Applications hose and hose fittings attention matters

Applications hose and hose fittings attention matters:Stop hose lines envisaged should protect piping assembly and disassembly and debugging spatial position, to prevent the machine installation of the pipeline annoyance. In addition to the use of compressed air before receiving just inside and connectors impurities. Piping should be clean and decency, Hydraulic tube fittings number, tied, easy review. Applications should pay attention to things that case temperature hose, the hose because it will indirectly affect the pressure and things robustness. Hose is not too long, to reduce the loss of air pressure in the pipeline. The value of the radius of curvature in the demarcation line above, do not be too tortuous leaned local joints, lest caused leaks, prevent hose changed. Tighten rib fittings, they should pay attention to proper tightening torque.

Professional production companies ferrule fittings hose fittings classification tell you

Push-in fittings : Often used in pneumatic circuits nylon tubing and polyurethane tube link. * Banned * Solenoid valve * ban * Parameter parsing level
Application after inserting the tube by fitting the elastic snap ring firmly its own bite by an O- ring seal . Just unloading tube circlip depressed , you can conveniently pull out the tube . Push-in fittings variety, dimension series is also very complete, is the most extensive use of hose fittings a . Quick Change Connector: neither need a thing but also to achieve rapid loading and unloading of pipe joints in the piping assembly and disassembly are often needed especially useful . Quick-change Hydraulic hose fittings with internal unidirectional element , ball joints rely on each other when convergence positioned on both sides of the gas line connected ; joints unloaded open , gas is disconnected , no longer need to install air source switch. Quick coupler with inner rib, outer rib , metric rib, rib cylindrical tube , tapered tube and one end of the rib rib, the other end of Budo joints, two are Budo are rib joints and two other kinds of situations . Joint body data with brass or steel. Hydraulic pipe fittings in the name of individual nickel-plated chrome finish. Quick screw fittings : its structure in the outer cone connector body has an arc -shaped table , the receiver will be set in the hose fitting on the outer cone nut can be tightened to seal probation . It is useful in nylon tube , plastic tube convergence. Budo fittings : in fact, used in rubber tubes and plastic tubes convergence, when things pressure > 0.4Mpa, the wire will probably need to use hose clamps truss .

Card sets of pipe joints assembly

Preloaded ① fittings fittings fittings fittings of the most important aspects of pre-installed, directly affects the reliability of the seal. Generally require a dedicated preheater. Small diameter connector can be pre-installed in a vise. In practice, with a connector as the parent, the nut, ferrule onto the tube can be pressed. There are card sets straight couplings, sleeve type end through turn heads, ferrule tube Hydraulic pipe fittings and other types. I found that even in the same factory shipment, these types of connector body tapered hole depth is often not the same, the result is caused by a leak, and this problem is often overlooked. The correct approach is, the pipe end what kind of connector body connection, the corresponding connection terminal is preloaded with the same type of connector, so to avoid possible leakage problems. ② pipe end should be flush. After sawing the pipe should be flush grinding wheel and other tools, and deburring, cleaning with high-pressure air to blow before use. ③ pre-installed, you should try to keep the tube and the coaxial connector body, if the pipe deflection is too large will cause seal failure. ④ preloaded force should not be too large so that the ferrule tube embedded in the outer wall just inside the edge, card sets shall have no deformation. During pipeline connection, then the provisions of the tightening force assembled. ф6-1 card sets tightening force is 64-1 15n, 16фmmr 259n, ф18mm for 450n. If the pre-deformed when the card holder will lose the seal. (Two). Prohibit adding sealant filler. It was sealed in order to achieve better results, ferrules, apply sealant, sealant was the result into the hydraulic system, hydraulic components causing blockage damping hole fault. (III). Connecting pipe should be sufficient deformation of the tube margin, to prevent the tube subjected to tensile strength. (Four). Connecting pipe should avoid subjecting it to lateral forces, lateral forces caused Mifengbuyan over the General Assembly. (Five). Connecting pipe should be a good one, to avoid multiple disassemble, otherwise it will seal performance deteriorated.

Fittings and installation methods of prevention

In the hydraulic system, both the metal pipe fitting, or hose fittings, there are prone to leakage problems. Hydraulic pipe fittings, mostly due to pipeline subject to greater external force or impact force, the card sets loose or deformed face caused by leaking pipe, you should check whether the card holder out of round, edge whether the defect, the pipe end is intact and nut, compression level, etc., while also eliminating pipeline force. For flared fittings, mostly due to excessive flaring, quality, undesirable or multiple demolition, resulting in flared cracks or deformation caused by leaks, then you can be re-flared front truncated. If you use a male and female cone top pressure seal, the leakage is mostly due to two cone damage, available on the cone abrasive grit grinding. In some with "о" or outer-ring face seal by the occasion, the leakage following reasons: "о" ring aging or deformation caused by leakage; "о" ring assembly is not in place, so that the two plane connection when pressure is uneven or "о" ring is cut resulting in leakage.

Flared fittings factory tells you to prevent leakage of hydraulic quick coupling

In the hydraulic system, both the metal pipe coupling, or hydraulic fittings, there are prone to leakage problems. For ferrule fittings, mostly due to pipeline subject to greater external force or impact, so that the card sleeve loose or deformed face caused by leaking pipe, you should check whether the card holder out of round, whether the defect edge, whether the pipe ends intact and nut, compression level, etc., while also eliminating pipeline force. For flared fittings, mostly due to excessive flaring, quality, undesirable or multiple demolition, resulting in flared cracks or deformation caused by leaks, then you can be re-flared front truncated. If you use a male and female cone top pressure seal, the leakage is mostly due to two cone damage, available on the cone abrasive grit grinding.In some with "о" or Hydraulic pipe fittings face seal by the occasion, the leakage following reasons: "о" ring aging or deformation caused by leakage; "о" ring assembly is not in place, so that the two plane connection when pressure is uneven or "о" ring being cut cause leakage; "о" rings uncompacted, elastic deformation caused by insufficient leakage; "о" spigot ring groove too deep and cause leaks. In this regard, the need to re-select the same diameter and cross-sectional thick "о" rings can also be sealed with a rabbet plane for cutting grooves or grinding to reduce the rabbet groove depth, so that "о" rings are flexible enough to deformation (compression should generally be between 0.35-0.65mm).For the use of oil and rubber, wool felt, soft steel cardboard, combined sealing gasket or sealant leaking pipe joints, whether any material, you should first check the seals for damage, deformation, aging and rough through the large, etc. and then take the appropriate measures.

Hydraulic fittings system which causes abnormal pressure

Hydraulic fittings system pressure anomalies generally reserved for system piping design a lot of pressure measuring points , measured using the pressure gauge readings , and comparative analysis to determine the cause of the normal abnormal pressure of the Hydraulic ferrules components. Velocity anomalies individually adjustable throttle, variable speed control valve and variable pump body , corresponding to the test speed of the actuator range values ​​, comparative analysis with the design values ​​can be determined . Each movement abnormalities switching valve, observe the actions related to the implementation of components status is normal , you can find out the abnormal valve, then check the action sequence and stroke control , identify exception handling . Other abnormal vibration, noise , oil spills, heat , etc., do not be turned off , it should be exactly two see three observation and analysis process to determine abnormality .Integrated hydraulic fittings used in Hydraulic adapters fluid mechanics knowledge , theoretically hydraulic fittings and hydraulic components for hydraulic circuits any failure analysis. The following example will be explained the general failure of hydraulic fittings lookup process . Fault Name : hydraulic pump cavitation ; failure phenomenon : vibration, noise , cavitation ; main reasons: the pump suction pressure is lower than the gas separation pressure , or inhaled air . Inference analysis : the use of the energy equation and the continuity equation for flow pump suction process analysis, determine the hydraulic fittings hydraulic pump failure reasons: oil level is too low --- pressure tank vents clogged pump inlet flow rate is too high.

Classification and different name hose

"Hose" mainly refers to the "rubber hose" that is, rubber hose, material can be divided according to the enhancement layer wire braid (winding) hose, fiber braid (winding) hoses and hose cloth, Hydraulic hose fittings subdivided as an ordinary cloth hose, suction hose (suction hose buried, not only as a fabric layer and spiral steel wire reinforcing material), nylon tire cord fabric (nylon cord) hose, etc.;
Use can be divided into water hose, air hose, oil hose, acid hose, heat-resistant hose, oxygen hose, acetylene hose, gas hose ...... and so on.
It was also the PVC, PE and other plastic hoses called "hose."...

Corrugated metal hose is a modern industrial pipeline a high quality flexible connection pipe

Corrugated metal hose is a modern industrial pipeline a high quality flexible connecting tube. It mainly consists of metal bellows, metal mesh and various different forms of joint components. It is a spiral-shaped corrugated inner tube or annular corrugated thin-walled stainless steel bellows, bellows outer sleeve made ​​of stainless steel wire mesh or stainless steel woven according to certain parameters. Hose connectors at both ends of piping or equipment in accordance with the user's joint form prepared Hydraulic pipe fittings bellows hose is made of stainless steel seamless or longitudinally welded stainless steel thin walled tube through precision molded plastic deformation. Bellows hose contour determines the elasticity of softness and fatigue resistance, easy to absorb all kinds of sports deformation and cyclic loading, especially to meet the system larger displacement compensation. Corrugated metal hose has good flexibility, fatigue resistance, high temperature resistance, corrosion resistance, and many other excellent features, it is relative to other types of hose (rubber hose, plastic hose) lifetime is much higher, with the the development of modern industry, resistant to high temperature, high pressure, corrosion-resistant corrugated metal hose is increasingly widely used.

Stainless steel plastic coated metal hose

Stainless steel plastic coated metal hose has good flexibility, corrosion resistance, high temperature resistance, abrasion resistance, tensile strength, water resistance and provides some electromagnetic shielding performance.
Stainless steel plastic coated metal hose can be freely bent into a variety of angles and radii of curvature in all Hydraulic hose fittings have the same softness and durability; sections side buckle with a certain tensile strength, soft plastic bag to prevent cause damage to the internal pipe laying hose lines exposed.
Stainless steel plastic coated metal hose, light weight, good flexibility and strength of the connection with accessories, electrical properties and oil resistance, flame retardant, splash water, etc., are widely used in electric power, chemical industry, metallurgy, light industry, machinery and other industries.

Metal hose fittings and technical knowledge

With the rapid development of modern industry and the mutual penetration of various disciplines, metal hose in the machinery manufacturing, petrochemical, instrumentation, and is widely used on various projects. Nearly three decades, it has expanded used in aerospace, aviation, nuclear power, shipbuilding, electronics and new construction and other industrial sectors, a modern engineering technology indispensable accessory, plays a prominent role.In China, it appears the early fifties the most original metal hose, which is based on the strip is wrapped around the body of the bellows. However, it is developing very fast, after five years or so, we have gone Hydraulic adapters  through other countries traveled nearly a hundred years. Currently, we have been able to produce some reached the international advanced level of metal hose. However, due to technical exchange and standardization issues, a number of technical personnel in the field of design of the structural characteristics of modern metal hose, performance indicators is not very clear, resulting in a lot of new metal hose should use the occasion still use those structures in the form of relatively old metal hose, rubber tubes and plastic tubes. Universal metal hose technical knowledge, is to enable more people to become familiar with and master the knowledge of modern metal hose for wider and more reasonable to use it.

Corrosion-resistant stainless steel hose excellent main function

Metals and oxygen in the reaction atmosphere in the surface oxide film. In plain carbon steel iron oxide formed on inheritance oxidation, rust continues to expand, the ultimate formation of holes. You can use paint or oxidation-resistant metal (eg, zinc, nickel and chromium) plating to ensure the steel surface, but, as people know, this protection is only a film. If the protective layer is damaged, the following steel began to rust. Corrosion resistance of stainless steel hose depends Hydraulic tube fittings content, if the amount of chromium added to 10.5%, the steel is resistant to atmospheric corrosion performance increased significantly, but higher chromium content, while still being progressive erosion resistance, but not significant. The reason is of steel with a chromium alloying treatment, the change in the type of surface oxide became similar to pure chromium metal oxide formed on the surface. This tight adhesion of chromium-rich oxide protective surface to prevent further oxidation. This thin oxide layer, through which you can see the surface of the natural luster of stainless steel, the stainless steel has a unique surface. Moreover, if the surface is damaged, the exposed surface of the steel, and self-repair reaction atmosphere, re-formation of this "passive film" Inheritance protective effect. Therefore, all of the stainless steel tube used have a common characteristic, that chromium content of 10.5% or more.

Metal hose reel machine nonmetal parts cleaning method

Metal hose reel machine nonmetal parts cleaning method - in metal hose machine with metal parts, there are also non-metallic parts, metal hose machine maintenance, it is necessary for some spare parts for cleaning. Clean metal parts, generally diesel, petrol or cleaning agents. However, in cleaning metallic parts, can not be used diesel oil, gasoline and the like for cleaning it. Otherwise, it will make some non-metallic parts deformation, deterioration or failure. Therefore, the non-metallic parts should be based on different materials, use of Hydraulic hose fittings cleaning fluid.1, is to clean friction plate, such as the clutch friction plate, brake linings, etc., can only use petrol to clean.2, which is made ​​of rubber parts cleaning, such as rubber sheet, aprons, etc., should be cleaned with alcohol or brake fluid.3, is to clean paper parts, can not be washed with water in the diesel fuel to clean.4, is made ​​of parts cleaning foam should use detergent or soap and water.5, is to clean leather accessories, such as drive belts, etc., they can be washed or wiped clean with a cloth

How to choose metal hose connector Adhesives

Metal hose fittings selecting the basic principles of adhesives - Adhesives with special features and practical value in the metal hose connector is widely used . The world for different purposes than ten thousand kinds of adhesive above , the choice of adhesive , to be based on the following four indicators . ( 1 ) anti-media functionsAir, water, oil , acid, etc. referred to a qualitative , most preferably adhesive resistant to air dielectric function , is bonded to the adhesive member in the air the highest intensity . In the different types of gas or injection of the adhesive force of dissolution medium is quite different , and even then angle during operation of a prime mainly air , water, oil , and acids . Use adhesive should be selected using the media -resistant plastic . 2) The adhesive strength of the adhesive face of each 1cm2 , the normally gentle air medium is called Hydraulic tube fittings strength , in MPa . And the adhesive strength of tensile strength, shear strength, torsional shear strength and peel strength lengths , respectively mean adhesion member in a different direction of the force of the breaking strength . Select adhesives, should be based on the position of mechanical parts and force intelligence misinterpreted selection with suitable strength adhesive . ( 3 ) Temperature function refers to fully cured layer can withstand temperature range, such as a temperature -60oC-120oC, that is, the stick and is available in the range of -60oC to 120oC combined , exceed this limit , the adhesive force decreased significantly. Construction machinery cooled engine , the body temperature up to 130oC. Hydraulic oil up to 120oC, the selected bonding adhesive must be in this type of adhesive can withstand the temperature range. ( 4 ) curing time Curing time can be divided into the beginning of solid ( or called fixed ) time and Full cure time . It refers to the adhesive bonding at room temperature into a solid gel hereinafter gummy house at the time . Fixture is exposed adhesive layer is not due to weight loss pieces time required ; whole solid layer is fully cured , and the highest strength and resistance to media stick Sharp function best time . Fixture time adhesives can be divided by cyanoacrylate ( or Quick Adhesive ) and slow Adhesive two kinds . Cyanoacrylate Fixture time only a few seconds or tens of seconds . For more on the slow Adhesive shorten the curing time , the available heat blowing heated oven baking and other measures , but the heating temperature and time should be different types of plastic may be. Choose instant dry or slow adhesive kind , according to the different circumstances of the adhesive pieces and work needs. In general, the slow adhesive bond strength and superior anti-media performance cyanoacrylate .
The above points are selected adhesive metal hose connector fundamental principles , and only choose exactly adhesives in order to achieve the desired results, the use of metal hose restore function .

DPJ externally threaded metal hose connector termination structure and characteristics

DPJ externally threaded metal hose connector termination structure and characteristics:* DPJ external thread termination metal hose connector is JB/GQ0552-83 D95-5 metal connectors of extension products;
* MetalHydraulic hose fittings made ​​of zinc alloy die-casting, zinc plated, brushed, or chrome; compact, non-porous, high strength. Reliable connection with metal hose, aesthetic appearance;
* This termination type metal connector is used to connect the metal hose on the straight line connecting the cabinet member;
* Adapter Metal Hose: JS type, JSH type, JSB type, JSHG type;
* Recommended use imperial or metric threaded metal hose connector metal joints;
* Can be customized non-standard metal hose joints and special metal joints.

DKJ card sets of metal joint structure and characteristics

DKJ card sets of metal joint structure and characteristics:
* DKJ card sets metal hose connector, can non-threaded steel pipe and hose connections, save the threading process, you can simply screw into;
* Metal Hydraulic pipe fittings  made ​​of zinc alloy die-casting, zinc plated, brushed, or chrome; compact structure, high strength. Steel and metal hose connection, reliable, attractive appearance;
* This card sets the metal connector is used to connect to the metal hose pipe without threaded over;
* Adapter Metal Hose: JS type, JSH type, JSB type, JSHG type;
* Adapter Pipe: thin steel wire tube, black, galvanized iron pipes (water, gas pipes);
* Use metal connector DKJ card sets, please note the connection pipe hose specifications, dimensions.

Such maintenance so bright as new faucet

Buy a favorite bathroom faucet, how to properly use and maintain, is that many users feel headaches and nerve-racking thing. In fact, as long as the installation, use and maintenance of the correct well, tap the actual life can continue for a long time and can remain bright as new. 1, to please experienced and qualified professionals in construction and installation. Installation, the faucet should try not to bump with a hard object, not to cement, glue residue on the surface to avoid damaging the surface gloss coating. Pay attention to the pipes installed after the debris removal Hydraulic tube fittings tap. 2, in the pressure of not less than 0.02mpa (ie 0.2kgf/cm2) in the case, in use for some time, if found out of water is reduced, or even turn off the water heater's phenomenon, can be at the head of the outlet gently unscrew the screen cover, remove impurities, generally can be restored as ever.3, water taps do not overexert, gently turn to homeopathy. Even the traditional style taps, nor do they need a lot of effort to twist die. Especially not to handle or use as a handrail to support. 4, the shower bathtub faucet metal hose should be kept natural stretch state, do not, do not be coiled in the faucet. Meanwhile, in use or not, pay attention to the hose and valve body joints do not form a corner, so as not to break or damage the hose.

Resistant metal hose

Resistant metal hose coal injection system in ironmaking, steelmaking refining furnace and other solid materials to ease the occasion, with ordinary metal hose soon frayed, Hydraulic hose fittingsHydraulic hose fittings manufactured using wear resistant stainless steel corrugated hose advanced technology from developed, proved through practice, high-speed flow in the pipe body particle abrasion, long service life.
Wear-resistant metal hose pipe body using multi-layer composite structure, followed by heat from outside to inside layer of asbestos cloth, wire mesh layer, a metal layer and a trapezoidal cross-section bellows wound metal hose layer. Its layers and hoop ends welded together tight combinations, hose quick connector used between the body. The metal hose better solution because partial burning of the surface and the inner tube wear two major problems affecting the service life of metal hose, metal hose and compared to similar existing product life greatly improved, the relative cost of production significantly reduced iron plant particularly suitable application technique used in pulverized coal injection.

The role is a hose

Metal hose used for automated meter signal wire protection tube and instrument protection tube. Instrument for the protection circuit, protecting precision optical ruler to protect the sensing lines threading stainless steel hose, metal hose electrical protection; stainless steel Hydraulic hose fittings hose, good softness, dustproof, waterproof, anti-oil, anti-rust; abrasion resistance, and provide some shielding effect.The sensing for precision optical ruler line protection, industrial sensor circuit protection. Has good flexibility, corrosion resistance, high temperature resistance, abrasion resistance, tensile strength.

Country analysis of metal hose industry cluster advantages

Industrial clusters as a form of industrial organization, both to avoid the "integration" and caused a large group management and agency costs too high, but also avoid the long-distance exchange transaction costs and lead to the problem of high cost of logistics . 1, is conducive to the depth of the division of labor among enterprises, but also beneficial to the depth of the division of labor and the spirit, helping improve efficiency, is conducive to technological innovation. In this industrial cluster metal hose Hydraulic pipe fittings  models are generally "core competencies plus outsourcing." That each firm will be fully funded entirely concentrate to do their most advantageous that point, this point made ​​the country's most expensive, best, and even the world's most expensive, best. This is mostly the company's core capabilities. Other work, including other parts of the production, product design, sales and other related businesses, are outsourced to other specialized companies to complete. In this way, each product is a summary of a number of core competence.
1, industrial clusters help to save the cost of trading two industrial clusters favorable industry and professional market mutual promotion three industrial clusters easier to stimulate the sense of competition 4, favorable investment five industry clusters, industry clusters favorable treatment "credit deficit disorder 6, industrial creation of regional clusters favorable brand

Country analysis of metal hose industry cluster advantages

Industrial clusters as a form of industrial organization, both to avoid the "integration" and caused a large group management and agency costs too high, but also avoid the long-distance exchange transaction costs and lead to the problem of high cost of logistics . 1, is conducive to the depth of the division of labor among enterprises, but also beneficial to the depth of the division of labor and the spirit, helping improve efficiency, is conducive to technological innovation. In this industrial cluster metal hose, business models are generally "core competencies plus outsourcing." Hydraulic tube fittings firm will be fully funded entirely concentrate to do their most advantageous that point, this point made ​​the country's most expensive, best, and even the world's most expensive, best. This is mostly the company's core capabilities. Other work, including other parts of the production, product design, sales and other related businesses, are outsourced to other specialized companies to complete. In this way, each product is a summary of a number of core competence.1, industrial clusters help to save the cost of trading two industrial clusters favorable industry and professional market mutual promotion three industrial clusters easier to stimulate the sense of competition 4, favorable investment five industry clusters, industry clusters favorable treatment "credit deficit disorder 6, industrial creation of regional clusters favorable brand

Plastic coated metal hose and application overview

Plastic coated metal hose Major parts of the austenitic stainless steel, thus ensuring a plastic coated metal hose excellent heat resistance and corrosion resistance, plastic coated metal hose operating temperature range greatly, as -196-600 ℃, in actual use, according to corrosive media channels to select the appropriate grade of stainless steel, plastic coated metal hose to ensure corrosion resistance. Annular Hydraulic hose fittings coated metal hose was closed annular tubular housing by the ring between waves and wave ripples in series. Annular plastic coated metal hose made seamless pipe or welded pipe forming process. Constrained by the processing methods, compared with spiral corrugated pipe, its single-tube length is usually shorter. Plastic coated metal hose is made of very thin-walled stainless steel seamless or welded congregation plastic coated metal hose through high-precision plastic processing forming. As plastic coated metal tube determines the elastic properties of the silhouette hose has good flexibility and fatigue resistance, making it very easy to absorb deformation of the cyclic loading a variety of sports, particularly in the piping system has the ability to compensate for a large amount of displacement .

Corrugated metal hose Features

Corrugated metal hose Features1, the recommended maximum allowable amount of expansion of each wave: full-height △ α = ± 24mm half-high △ α = ± 12mm.
2, block gray plate: less dust on the air duct pipe may not be used for dusty flue should file gray board.3, to reduce the number of bellows node should be considered cold drawn 50%.4, the standard half-height corrugated metal hose for cross-sectional area less than 4.6 square meters and the smoke duct dimensions less than 1.5m in one side but Hydraulic tube fittings greater than 0.6mm occasions. Standard full-height corrugated metal hose for all the smoke duct.Corrugated metal hose has good flexibility, fatigue resistance, high pressure, high temperature resistance, corrosion resistance, and many other features, it is relative to other hoses (rubber, plastic hose) much higher lifetime would therefore it also has a high overall economic efficiency. With the development of modern industry, for high temperature, high pressure corrugated hose you also demand greater and greater.Hose Scope: need fully flexible pipes, to prevent vibration premises piping for steam, gas, air, heavy oil, petroleum, chemical-pharmaceutical etc apply.

Metal hose material characteristics

Metal hose connectors at both ends: Connector includes threaded connection, flange connection, quick connector, metal hose three main functions: to reduce the stress of the pipe installation, compensating pipe nominal position to absorb the vibration of piping system.Stainless steel Hydraulic pipe fittings  mesh cover is a metal braided hoses installed in the pressure line of the main pressure parts, while the protective effect of the metal hose, the pressure in the pipe size and locations, you can select one or more layers of stainless steel wire or steel band performed according to certain parameters is woven to form a high pressure metal hose, I produced the metal braided hose pressure range usually ask PN0.6-32.0MPa, up to 42.0MPa. Stainless steel mesh nets are set with steel nets two types.

How to put a good quality metal hose

Raw materials for metal hose metal hose production enterprises is crucial is to ensure product quality metal hose basis. However, with the metal hose increasingly fierce competition in the market, there are always some mercenary manufacturers or unscrupulous traders, metal hose will shoddy products to market, even if some of the regular manufacturers, due to their own loopholes in management or other reasons, may also make Some low-quality products into the market. These inferior products used Hydraulic tube fittings production process, constitute a significant quality or safety problems, has become the product quality accidents or safety incidents culprit. In addition, the procurement of raw materials back if not properly controlled, but also directly affect the quality of products. How to prevent shoddy or deterioration of raw materials into the production line, every business needs to study. Experts believe that the metal hose business enterprise to control the quality of raw materials procurement, to ensure product quality and safety, from the raw material supplier evaluation, selection, strengthen inspection before storage of raw materials, improve storage management to control quality and other aspects .

Overview of the hose

Hose mainly divided into: stainless steel hose, metal hose, corrugated hose, plastic hoseCorrosion resistance of stainless steel hose depends on the chromium content, if the amount of chromium added to 10.5%, the atmospheric corrosion resistance of steel significantly increased,Jic hydraulic fittings  but the higher chromium content, while still being improved corrosion resistance, but obvious. The reason is of steel with a chromium alloying treatment, the change in the type of surface oxide became similar to pure chromium metal oxide formed on the surface.This tight adhesion of chromium-rich oxide protective surface to prevent further oxidation of this thin oxide layer, through which you can see the surface of the natural luster of stainless steel, the stainless steel has a unique surface. Moreover, if the surface is damaged, the exposed steel surface and atmospheric reactions will self repair, re-formation of this kind of "passive film" and continue to play a protective role.

China's metal hose industry

Nearly half a year, the joint efforts of all parties, the financial crisis in an increasingly ice ablation. Ceramic industry for the better stabilization of the overall situation, but the pressures and challenges still. In fact, due to various reasons, our metal hose industry sector in the development process accumulated in some deep-seated contradictions and problems, not only surfaced, but exposes future development focus and difficulty lies. Excessive investment led to serious excess capacity is widespread, and the industry concentration is low, the structure is irrational, big but not strong problem is very prominent. Insufficient capacity for independent innovation capability, attention to light, less investment, care for immediate benefits at the expense of long-term development, product homogeneity is still fairly obvious. Metal hose enterprises are facing pressure on energy saving is still heavy, product unit energy consumption and resource utilization Hydraulic adapters  compared with the international advanced level there are still gaps. Meanwhile, the company's cost remains high. China's metal hose enterprise development, enterprise scale is uneven, the overall competitiveness of the industry needs to be strengthened. The face of the financial crisis triggered by the economic downturn, the timely introduction of the implementation of the national expansion of domestic demand growth, improve the export tax rebate rate and a series of favorable policies and measures, effectively pulling the domestic market, metal hose enterprises to reduce losses generated rebound positive effects play an important role. Ceramic industry for the better stabilization of the overall situation, but the pressures and challenges still. In fact, due to various reasons, our metal hose industry in the development process accumulated in some deep-seated contradictions and problems, not only surfaced, but exposes future development focus and difficulty lies. Requires us to stand on the height of a global perspective, a good grasp of the economic development cycle, analyze the national macro-policy direction for the metal hose industry market conditions to analyze specific issues, understand the situation, seize opportunities, reasonable forecast future trend of metal hose industry and formulate correct development planning, timely adjust their development strategies, and actively explore new markets, the crisis in an invincible position in the development of a higher level.

Application of flexible metal hose

Flexible metallic conduit is used in wire and cable protection sleeve of the new material, belonging to the flexible metal hose, can be used for a variety of occasions that concealed within the dark and in-situ concrete laying. Bathroom bath or kitchen washing equipment leakage of water, it will depend on whether the connector metal hose connectors and bolts burst fracture, triangle valve bolt burst phenomenon. If you encounter this situation, measures should be taken to repair the water shutoff, corrugated metal Hydraulic tube fittings  hose adopts foreign advanced technology, combined with the development of the domestic market, the characteristics of the stainless steel bellows and rubber elasticity characteristics of Nepal, to optimize the combination, compensation devices, widely used ship, central air conditioning pumps, high-rise building fire pumps, engine export, effectively absorb vibration host or system, reduce transmission source and system expansion and contraction and installation of compensation, noise absorption piping systems, protective equipment, environmental protection, extended equipment and system life. has: Durable, high temperature, high pressure, corrosion, environmental protection advantages. replaced the soft rubber joints caused by unsanitary, easy to aging, pressure unstable, delamination tear, blasting and other adverse factors, to solve the system running worries. damping bellows compensator, metal hose is vibration system supporting the best choice.

Reinforced metal hose production process

Reinforced metal hose: hose housing and disposed therein end portions of the rubber tube is placed between the fastening with three metal sleeve, and the inner flange and the cap casing the outer layer and the intermediate metal valgus sleeve edge clamped together. Connections are secure, using the process will not fall off the hose casing and production installation convenient and simple. Hose casing and placed in one of the rubber tube, rubber tube ends and the ends of the socket with union nut connection gap with metal cap sleeves, middle and outer metal sleeve placed between the metal sleeve. Metal bellows, welded bellows end of the band tapered pipe thread Hydraulic pipe fittings, characterized in that the bellows other end a and its connected as one of the light pipe, the light pipe sleeve with nuts, inside a the light tube is connected to the one of the convex ring, which has a convex outer ring gasket. Using a local one structure, only the use of a weld, the weld to reduce its impact, reducing the chance of leakage of gas, to improve the safety of use.

Stainless steel plastic coated metal hose

Stainless steel plastic coated metal hose:Stainless steel plastic coated metal hose has good flexibility, corrosion resistance, high temperature resistance, abrasion resistance, tensile strength, water resistance and provides some electromagnetic shielding performance.Stainless steel plastic coated metal hose can be freely bent into a variety of Hydraulic hose fittings and radii of curvature in all directions have the same softness and durability; sections side buckle with a certain tensile strength, soft plastic bag to prevent cause damage to the internal pipe laying hose lines exposed.Stainless steel plastic coated metal hose, light weight, good flexibility and strength of the connection with accessories, electrical properties and oil resistance, flame retardant, splash water, etc., are widely used in electric power, chemical industry, metallurgy, light industry, machinery and other industries.

Metal hose (English name: Metal Hose

Bellows one series of products.Metal hose is an important engineering technology connecting member by corrugated flexible tube, a combination of nets and Hydraulic tube fittings. In a variety of gas, fluid piping systems as well as length, temperature, position and angle compensation systems as compensation components, sealing elements, connecting elements and a damping element, used in aerospace, petrochemical, mining, electronic, mechanical shipbuilding, medical health, textile electronics, energy and construction fields.China was in 1993 issued a national standard "corrugated metal hose general technical conditions" (GB/T14525-93).Austenitic stainless steel metal hose material or materials required by the user, with excellent flexibility, corrosion resistance, high temperature resistance (-235 ℃ ~ +450 ℃), high pressure resistance (up to 32MPa), the tube path can be connected in any direction, for temperature compensation, and absorb vibration and reduce noise, change the medium conveying direction, remove pipe or between pipes and the mechanical displacement devices, double flange metal corrugated hose to a displacement, vibration a variety of pumps, valves and other flexible joints is particularly applicable.

Metal hose connector construction and performance overview

Metal hose connector is a modern industrial pipeline a high quality flexible connecting tube . It mainly consists of metal hose , metal mesh and various different forms of joint components. It is a spiral -shaped corrugated inner tube or annular corrugated thin-walled stainless steel bellows , bellows outer sleeve made ​​of stainless steel wire mesh or stainless steel woven according to certain parameters . Hose connectors at both ends of piping or equipment in accordance with the user 's joint form prepared Hydraulic hose fittings  hose is made of stainless steel seamless or longitudinally welded stainless steel thin walled tube through precision molded plastic deformation . Bellows hose contour determines the elasticity of softness and fatigue resistance , easy to absorb all kinds of sports deformation and cyclic loading , especially to meet the system larger displacement compensation . Metal hose has good flexibility , fatigue resistance , high temperature resistance, corrosion resistance , and many other excellent features, it is relative to other types of hose ( rubber hose , plastic hose ) lifetime is much higher, as development of modern industry , resistant to high temperature , high pressure , corrosion-resistant corrugated metal hose is increasingly widely used.

Hose connector installation should pay attention to matters

1, stainless steel hose bellows made ​​of chromium-nickel austenitic stainless steel, the use of nitrogen ions attention to prevent pitting corrosion and dilute sulfuric acid, sulfuric acid corrosive damage.2, the user of the device is equipped with stainless steel hose, piping for water pressure test, should prevent rust block shock, chlorine ions Hydraulic hose fittings sedimentation, causing corrosion and mechanical damage.3, when installing metal hoses need to prevent welding spatter burns and mechanical damage, otherwise it will cause leaks.4, sealing piping should strictly comply with safety rules and prevent the improper operation or other factors caused by overpressure caused by the pull-off or blasting hose.5, carefully digested stainless steel hose installation method of example, and in strict accordance with the correct thumbnail installation.

Metal hose connector overview

Metal joints made ​​of zinc alloy die-casting, zinc plated, brushed, or chrome; compact, non-porous, high strength. Reliable connection with metal hose, attractive appearance; metal connectors of Hydraulic adapters termination type, metal hose is used to connect to the box straight connector; adaptation metal hose: JS type, JSH type, JSB type, JSHG type ; recommend using imperial or metric threaded metal hose connector metal joints; can be customized non-standard metal hose joints and special metal joints.

The composition and properties of the hose

Bellows hose is made of stainless steel seamless or longitudinally welded stainless steel thin walled tube through precision molded plastic deformation. Bellows hose contour determines the elasticity of softness and fatigue resistance, easy to absorb all kinds ofHydraulic tube fittings sports deformation and cyclic loading, especially to meet the system larger displacement compensation. Corrugated metal hose has good flexibility, fatigue resistance, high temperature resistance, corrosion resistance, and many other excellent features, it is relative to other types of hose (rubber hose, plastic hose) lifetime is much higher, with the the development of modern industry, resistant to high temperature, high pressure, corrosion-resistant corrugated metal hose connector is increasingly widely used.

Classification of fittings

Classification of fittingsHydraulic hose, high pressure ball valves, intentions odd quick connector ferrule fittings, welded pipe fittings,highpressurehoses.Metal hose fittings, hose Hydraulic pipe fittings Hydraulic pipe fittings, transition fittings, ferrule fittings, tee pipe fittings, non-standard pipe fittings, flare fittings, angled fittings, swivel fittings, quick connectors , stainless steel pipe fittings, copper fittings.

Cable connector Installation Overview

Cable connector can be divided according to the installation location indoor type and outdoor type two.Press the fabrication and installation of materials can be divided into heat shrinkable (most commonly used), and epoxy resin casting dry-inclusive formula and cold shrink.Press materials can be divided into copper wire core power cable heads and aluminum Hydraulic adapters cables head.Its main role is to make lines smooth, so that the cable remain sealed, and to ensure that the cable joints insulation levels, making it safe and reliable operation. If the seal is bad, not only oil spills caused by oil impregnated paper dry and moisture intrusion inside the cable will make paper insulation performance.

EMT fittings

EMT fittings(A) the highest tensile properties, derived from a special patented design crowns clamping jaw and seal the match. (2) the product packing nut with a thread, relaxing design, able to withstand high near vibration caused by mechanical equipment loose danger. (3) a professional point of view using high specification materials performance, the most outstanding weathering performance has been verified numerous user Hydraulic ferrules experience. (4) the history of the most perfect dustproof and waterproof design when the cable and connectors through an appropriate mix of up to 50 meters underwater safe to use. Protection class IP68. (5) This product is fully complied with strict safety design, its material properties are also able to resist a variety of chemicals, solvents, oil and gas and oil, etc. caused by erosion. This product is UL inspection (6) As a professional leader in fixed head, we have their proactive customer service provide all kinds of safety documents

Swivel hose fitting routine maintenance knowledge

Swivel hose fitting routine maintenance knowledge1, rotary joints should be kept inside the drum and pipe cleaning. Special attention should be on the new equipment, if necessary, take the filter in order to avoid foreign bodies caused by abnormal wear rotary joint.2, because the machine will lead to long-term use internal scaling and rotating joints from rust, please note that there will be such as re-use drip stuck or situations from occurring.3, with periodic oiling oiling device please ensure the reliability  Hydraulic pipe fittings  rotary joint bearing operation.4, the flow of heat medium rotary joint body should be gradually born temperature to avoid thermal shock.5, check the wear condition of the sealing surface and the thickness variation (normal wear and tear of 5 - 10mm); observe the sealing surface of the friction track and see whether there is intermittent or three, scratches and other issues, if any, is on the condition, should be replaced immediately.6, the rotary joint should be gently prohibited by the impact, in order to avoid loss of the coupling member.7, is strictly prohibited foreign matter into the rotary joint interior.8, the rotary joint not long idling.

Metal pipe fittings industry trends

Technical process is a measure of whether a company has advanced, the availability of market competitiveness, whether competitors can keep ahead of the important indicators are based. With China's metal fittings market, the rapid development associated with core production technology and R & D will become the focus of the industry's enterprises. Understanding of domestic production of the metal quick connector core technology research and development trends, process equipment, technology applications Hydraulic ferrules  for enterprises to improve product specifications, improve market competitiveness is critical.By and large, the metal fittings will be towards the development of the following aspects:(1) With the new technology, new technologies continue to emerge, new materials will continue to come out, the use of performance indicators excellent new material at reasonable cost some parts making metal joints, metal joints to improve corrosion resistance, anti-fatigue, temperature, Hydraulic hose fittings pressure, softness and effective way.(2) As for road, railway, transportation engineering, power plants, reservoirs, electrical transmission and distribution systems to continuously improve the overall level of facilities, the performance of its facilities has put forward higher requirements. In order to constantly adapt to a variety of topography, ground conditions and complex geographical environment, the need for the overall performance of metal joints were measured, such as bending resistance, overall tensile strength, etc., by improving the overall quality level of insulation joints to accommodate the actual work in the harsh natural environment and engineering requirements.

Metal hose fittings are two reasons for failure of individual

Metal hose fittings in stainless steel mesh cover mainly on the protective effect of the bellows and bellows withstand the pressure within the medium (mainly axial force) effect. Nets coated on the outside bellows, bellows and ends with end rings and joints welded.(1) Weld mesh sleeve pull-off caused byBecause the quality of welding causes the bellows, ring and steel mesh welding process sets in the Trinity caused some wire Weld (burnt or welded on the end). Such as steel wire hose into the pipe after the uneven force, under pressure in the medium, Weld wire at first pull off, so that Hydraulic ferrules  whole steel mesh sleeve pull-off, resulting in failure of the outer drum bellows, dangerous.(2) improper installation, causing the screen to pull off Hose installation process, because improper installation, or when the pressure is too high, the hose will be subjected to tensile and distorting effects, when the tensile stress generated in excess or distortion of the hose sleeve ultimate strength steel wire, makes the soft Trinity pipe welding parts nets or other parts of the nets to pull off, and then the bellows outer drum tensile failure, caused by media leaks, this should be properly designed and selection, installation accurate. In order to eliminate this happens, we should improve the quality of welding, metal hose fittings factory pressure and tightness test should be carried out examination, after passing to the factory.

Select Quick metal hose connector to note

1, the installation of the shape and size Make sure the quick connector type and material, and specify the corresponding properties in the assembly of piping shapes and sizes.2, the quick hose connector using environmentCombined withenvironmental conditions of humidity and dust conditions, and lightly corrosive environments such as the use to consider the type of the selected quickconnector, bulk materials, sealing materials.Select Quick metal hose connector to note a few points:3, Hydraulic hose fittings  liquid pressureFluid pressure is also quick connector selected key.4, the automatic switching valve structureFor the valve structure, there are two-way switch type, one-way and two-way switching open. 5, the type of fluid, temperature,The fluid, for the body material, the sealing material is different. Recommended steel, is the water you choose brass or stainless steel. Since the two-way switch in addition to the separation type other than a fluid flow from the piping. So please be careful.

Metal connector installation and routine maintenance of knowledge

Pronation type metal connector with the inner tube and Hydraulic pipe fittings tolerances recommended H8/e7 fit.An inner tube assembly, with attention to the size and weight of the auxiliary support. 2, the rotary joint rotation stopper should be properly supported and generally lever detent hole diameter should be smaller than 2mm, so as not to affect the freedom of swivel adjustment and compensation. 3, the rotary joint and pipeline connection between the hose must be used to connect (we recommend the use of scrambling and good company metal hose), the absolute prohibition of rigid connection. 2, concentric installed as to ensure the smooth functioning of the rotary joint. Connected to the device for rotating the joints of the various connections (According to the detailed structure of the equipment used to set various types of connections daily maintenance to reduce joint auxiliary weight and prolong life. 4, a rotary joint in threaded connections installation should pay attention to the inner and outer tube is threaded to the direction of rotation of the drum corresponds to the inner and outer pipes and screwed to it should be consistent. 5, the rotary joint in the handling and storage process should avoid bumps and drops, to avoid damage to the interface and internal parts. 6, the rotary joint and import as directly as possible with the metal connectors connected.

Metal hose connector fitting how to choose

1, the type of fluid, temperature (see selected for the type of fluid, the temperature of the body material and the sealing material of the metal fitting), the fluid, for the body material, the sealing material is different
2, the liquid pressure (Please select appropriate function of the fluid pressure of the pressure metal joints), the fluid pressure is also selected quick  3, quick connectors use of the environment, combined with the humidity premise, dust conditions, and easy to use environment, erosion, etc., to consider the type of the selected quick connector, bulk materials,Hydraulic tube fittings sealing materials. Withstand voltage characteristic corresponding to the metal mounting structure is different. 4, the installation of shape, size (in determining the final shape and size after ordering products) 5, automatic switch valve structure (please select appropriate use of the valve structure pipe quick connector) for the valve structure, there are two-way switch type, one-way and two-way switching open. Because in addition to the separation type two-way switch other than a fluid flow  Metal hose connector selection is a very important activity, a good metal hose allows you peace of mind, effort and more money. Metal hose selection procedure is divided into more than five steps, in accordance with such guidelines, basically able to select a suitable metal hose connector.

Swivel in all walks of introduction

Follow us mechanical level progresses, the rotary joint in the major fields of application is widely used, here we are here to introduce swivel joints specific application areas, as a detailed applications, chemical and pharmaceutical industries are also often used in operating rotary joints, such as the Some cylindrical and similar frustum-shaped drum dryer must be used on connection swivel on its connectivity; Second, swivel joints in the printing industry is relatively broad, mainly in rotary Hydraulic ferrules  and layered drying equipment, mixer, etc., gravure printing machine; Third, the rotary joint in the machinery manufacturing industry applications include: hydraulic machines, hydraulic machines, cooling screw press, pneumatic and hydraulic equipment and grasp the relevant device grip device, flexible hose , necking equipment; four, pinch, and he machine ji, food shipin drying equipment, vent xiefang Amps, rolling fensui crushing destroy equipment, rotary honggan drying equipment; Fifth, the rotary joint in the paper industry uses mainly: some paper the jiagong processing shebei equipment, like that zaozhi honggang paper machine dryer, zhengqiu steam ball, tubu coater, yaguang calendering machine: six, rubber and plastics industry and ultimately the rotary joint, the most common is ya calender , luoxuan screw extruder, mixed jiaoban mixers, kneading machines, laminating machines slewing and cengya, rubber vulcanization with gushi drum machines and automatic liuhua vulcanizing machines, zhushechengxing injection molding machine, mixer, foam machine, sheet manufacturing machine, mixing machine, dryer, cloth machine, paint machine, etc.: seven, electrical industry: dual water cooled generator zhuanzi leng rotor cooling, wire dianlan cable processing shebei equipment; eight, rotary joints in the building materials industry application: Plastic bizhi wallpaper processing equipment, shiyan test equipment, embossing machine, printing machine, pressing machine Hydraulic hose fittings and wood processing ditch printing machine. Rotary joint production technology continues to progress, production process sophistication, making it in all walks of life have made great use of its future development people are optimistic. ruanmu cork processing equipment. Asbestos zhipin products laminator.

Metal connector extension products

External thread termination metal hose connector is JB/GQ0552-83 D95-5 metal connector extension products;Metal joints made ​​of zinc alloy die-casting, zinc plated, brushed, or chrome; compact, non-porous, high strength. Reliable connection with metal hose, aesthetic appearance;This termination type metal connector is used to connect the metal Hydraulic pipe fittings hose on the straight line connecting the cabinet member;Metal hose adapter: JS type, JSH type, JSB type, JSHG type;
Recommended use imperial or metric threaded metal hose connector metal joints;
Can be customized non-standard metal hose joints and special metal joints.

Ordinary galvanized metal hose connector (snakeskin pipe fittings)

Hydraulic ferrules
Hose connector with polyamide (nylon) plastic. One end of the tubular metal hose fitted with the same specifications, the other end male thread (with thick pipe thread), with the same thread Hydraulic ferrules size electrical equipment, pipe joints and other connections. Connector specifications equipped with metal hose nominal Neijing size to distinguish, and hose fittings according to technical data sheet.

Metal hose connector There are several common types

Metal hose connector There are several common types?
(A) male connector: mainly used for in situ junction box and hose connections. Local box opening, stuffed joints, with lock nut fixed.
(2) female connector: mainly used for cable pipe and hose threaded connection.
(3) compression fittings: mainly used for metal hose and pipe connections, Hydraulic tube fittings mounted on the pipe without threading, the joints in the pipe end, a card that is in prison, with easy installation features.
(4) a plug-in connector: mainly used for embedded pipe-intensive small gap, insert the pipe diameter, easy to install.
(5) adjustable joints: mainly used for steel and metal hose diameter inconsistencies in the case, according to the on-site installation requirements of any larger and smaller.

Quality inspection of metal joints

Metal joints quality inspection: Connector core tube, jacket and the connection quality of the sealing portion, the joint must be rigorous testing prior to assembly. Test items, except the size, tolerances and machining accuracy shall conform to the provisions of joint drawings must also be careful to check the connectors and the hose interchangeability and whether to match. Including the threaded portion of the outer connecting application specific standard ring gauge, plug gauge tests have been passed, in order to ensure that the user's normal connection. Should also focus on checking the core tube surface finish, sharp edges smooth angular extent. If found  Hydraulic pipe fittings  metal parts have sharp corners or burrs must be carefully trimmed to use, otherwise it will seriously affect the hose assembly performance and life;Fitting metal parts used in the machining of steel itself has potential pitfalls (such as severe corrosion, internal cracks, etc.), the naked eye and difficult to find in the joint assembly and crimping process or during the hydraulic pressure test will occur in the radial or axial fracture gap. When the problem occurs, the connector on the same batch of metal parts should be a rigorous test piece by piece, while the hydraulic hose assembly inspection sampling proportion should be increased, so as to avoid the quality problems with the hose assembly to users be used.
In addition to the hose joints connecting portion size and smooth sealing surface should be particularly careful precision inspection, assembly, be careful not to damage the product is shipped with a plastic bag or plugs should pay attention to the protection, so as not to affect the quality of the installation. The joint surface of the outer metal mass in the hose assembly must be checked prior to assembly, coating removing undesirable coupling parts.

Method for processing metal joints Release

Method for processing metal joints metal joints are manufactured from metal profiles to use for assembly of fittings, pipe connection because of forms and for different purposes , and batch processing of different sizes, the processing procedures and forms are often not the same. Common metal joints processing technology and methods are as follows .
1 . Metal cutting metal cutting hoseJic hydraulic fittings are mainly turning oriented. General use of conventional metal cutting machine tools, lathes cases , turret lathe , lathes and CNC lathes. Large quantities of standard pipe fittings also have the automatic CNC lathes, multi-axis computerized automatic machines for processing. According to materials of different profiles and fittings types, often also need some auxiliary cutting and processing technology, such as hexagonal planer planing , planing wrench flat deep . Milling Milling Hex wrench flat milling depth . Grinding Grinding some pipe joint sealing surface. Wire clamp locking ring knock bed child lock nut for processing into other required shape accuracy and fittings.2 . No less cutting metal materials in order to improve the utilization , saving raw materials, and improve production efficiency. Hose Hydraulic pipe fittings in the processing , should minimize the amount of metal cutting . Under the conditions of the license , the outer grooves of the die roll forming method can be used . External thread rolling machine can roll out forming , thread tapping machine can attack the molding. In the air hose or some medium and low pressure tubing fittings die , should maximize the use of metal pipe with end forming machine or mold forming die sealed end . Coat is applied with low carbon content of sheet steel stamping jacket. Some types of joints such as the radial size of the die gap ( such as a flange type pipe joint ) , one end of the die is too long to be bent or curved angle of the die , can be segmented processing method of welding quality . Welding methods are welding, sub-arc welding , welding , etc. No less cutting pipe joints, most widespread application to the number of hot forging and cold extrusion process . It is suitable for mass production of standard pipe fittings , can greatly improve the utilization rate of the metal material , to improve the mechanical strength of the material , increase productivity and reduce production costs. General use certain tonnage forging machine , the cutting profile by forging or cold forming agent to the base pressure , by a small amount of metal cutting , you can obtain the required shape accuracy and fittings. Particularly suitable for pipe joint nuts and coat processing .3 . Heat hose Hydraulic hose fittings generally do not need treatment , as long as you can choose a suitable metallic material . However, the pipe joint parts or special requirements of individual pipe joint is sometimes necessary before the steel in the metal processing , quenching , annealing, heat treatment or chemical . To improve the material, to improve the life of the fittings and safety parts .
4 . Joint metal parts of the surface treatment . Hose connector jacket, in addition to the core pipe and fittings with stainless steel and brass easily corroded material processing , are in need of surface treatment to prevent corrosion and beautify the appearance to suit different purposes and occasions. Here are a few hose connector surface treatment method .

Dissimilar metal joints form is characterized by indirect connection

Dissimilar metal joints form is characterized by indirect connection1) indirect connection between dissimilar metals, pressure welding method is not usually used, instead of using welding and brazing methods may be used for riveting or screw connection method.2) indirect connection of dissimilar metal joints in space technology, nuclear reactors,  Hydraulic pipe fittings marine and petrochemical fields many applications.3) connected indirectly dissimilar metal joints, through a third party, the two metals are connected together to form a permanent connection not removable.4) indirect connection dissimilar metal joints, fill plus a third metal, is pre-prepared wire, plates, gaskets, rod, powder or other transition section. Connection process is more complex, requiring a high level of operation.

Metal connector

For aluminum-plastic composite pipes, multilayer composite pipes and other metal lined pipe, the welding difficulties will occur, so use more rigid metal connector, a pair of metal composite pipe fittings respectively connected to one end, and then tighten the screw through together, in this connection, the most error-prone areas is a composite pipe with metal  Hydraulic tube fittings of the question of the connection, such as aluminum-plastic composite pipe and pass between the metal fittings to connect the cone clamping collar, the collar is due a non-diagonal gap closed metal ring, tighten the nut collar is closed to compress the pipe and seals small. Installation even when a large pressing force, but the time may be too long because of relaxation of the polymer material leakage. Can not be welded to the cross-linked polyethylene pipe connector of this type can also be used.

How to find cavitation and air entrainment

How to know when a system is working with cavitation it? One way is mounted on the pump inlet side of a vacuum gauge and confirm that the pressure is equal to or higher than the nominal working pressure of the pump.
No cavitation vacuum table found the best way is to listen to the sound of the pump. Pump cavitation occurs emits a high-pitched sounds or screams. Sometimes it is difficult to bearing noise, coupling noise, or noise from nearby distinguish the machine, but can be distinguished empirically.Through the failure of the entire system can also be found cavitation and air mixing, for example: More knowledge about Hydraulic pipe fittings  Standard Health professionals canSince the pump suction dissatisfaction pump output flow will be reduced. This is enough to make the hydraulic cylinder or hydraulic operation of the motor slows down.
Damaged by cavitation control valve, the valve active channel becomes large, the movement speed and time may be allowed.System may show "spongy" action, particularly in the case of air into more so. Servo valve, mixed with air or the occurrence of cavitation in fluids will appear larger compressibility, the control circuit reduces the stiffness of the system operator can easily discover this phenomenon.

Different ways to connect the piston cylinder head structure and its assembly process are different.

Different ways to connect the piston cylinder head structure and its assembly process are differentflanged cylinder. When the cylinder bore hole chamfer at the end without eating bumps, piston surface has been coated with  Hydraulic adapters oil, and concentric with the piston inside the cylinder bore, the piston assembly can be loaded. Head static sealing incision should be coated backing grease or industrial vaseline, and to ensure that the backing does not pop dislocation, according to the specified torque and evenly symmetrical sturdy cylinder head bolts.Neckar-bonded head. When assembling the cylinder bore surface of the card must be filled keyway, round cylinder bore surface to ensure no card group, piston seal is not damaged, commonly used in two waysFactory jobs or in the case of conditions should be processed three snap ring, with its filled card keyway, the piston and the cylinder head to be guided into the cylinder barrel after the suit, and then three snap ring out, and then load the card key. Needed to be reset before loading the guide sleeve head positioning ring, retainer and other pieces.Or no processing at the construction site conditions, asbestos can cut a strip (width keyways and the card), with its groove fill card are the same as described above. This method is fast, convenient, and can guarantee the quality of  threaded connection head. Since the cylinder bore is internally threaded end easy on the seal damage, it must be processed when assembling a thin opening guide sleeve, with its fixed on the piston head, the piston inside the cylinder into a smooth, both to protect the seal pieces, but also improve the quality of assembly Generally: Just follow the above process seriously seals and hydraulic cylinder assembly, you can make the hydraulic cylinder seal failure due to greatly reduce the frequency to ensure reliable operation of construction machinery.

Plastic coated metal hose industry will be branded as a link

Plastic coated metal hose industry will be branded as a link, innovative marketing model. Plastic coated metal hose industry with brands as a link, innovative marketing model, the role of traditional physical market, shops, stores, and various exhibitions as a platform; networks and the use of modern information technology, to develop the role of network sales trading platform . In the "Twelve Five" period, with  Hydraulic tube fittings abundance of metal hose will establish a sound system of coordination, elongated and improve the industrial chain. . Plastic coated metal hose industry focus on talent as support, improve the overall quality. In the "Twelve Five" period, plastic coated metal hose industry is not only to bring in some industries, enterprises need of senior professionals, but also to accelerate the training of personnel shortage, creating an excellent quality of the system locks staff, for the same abundance plastic coated metal hose industry continues to provide strong technical support.
Innovative marketing model

Metal hose assembly is an important engineering technology connecting member

Metal hose assembly is an important engineering technology connecting member. In a variety of gas, fluid piping systems as well as length, temperature, position and angle compensation systems as compensation components, sealing elements, connecting elements and a damping element, metal hose used in aerospace, petrochemical, mining, electronic, mechanical shipbuilding, health care, textile electronics, energy, construction and other fields
The first is the role of joint bellows coupling nets as a whole, meanwhile, is also metal hose fittings and metal hose assemblies or other fittings, devices coupled components. It ensures that the medium in the piping system to work properly.  Hydraulic hose fittings  materials are usually the bellows, the same material nets, stainless steel-based multi. To reduce production costs, some of the larger diameter metal hose is not strong in conveying corrosive or non-corrosive media, the joint can be carbon steel; For corrosive media work in case of metal hose fittings, if the design to take appropriate measures to avoid contact with the medium can also be used to produce steel.

Threaded diameter is 50 mm below the metal hose connector

Threaded diameter is 50 mm below the metal hose connector to withstand high working pressure in the case of multi-threaded to the main thread when tightened after the two connectors on the inner and outer taper surface closely with a hermetic seal. Cone angle is generally 60 degrees, 74 degrees is also useful. The structure, good sealing, but the installation must ensure two countertop concentricity. In order to solve Hydraulic tube fittings  engineering often seen repeated demolition, installation and easy concentric and other issues, can also be designed as conical connector mating with the ball. Flange disc diameter of 25 mm above the metal hose joint, to withstand normal working pressure in the case in the main flange disc (see Figure 2-5c). It fit the form of tongue and groove seal. Rotating a radial direction, but also axially slidable flange looper tension force of the fastening bolts to connect two bodies. This structure sealing performance is good, but difficult process, the sealing surface is easy to bruise. Quick release is required for special occasions, you can tighten the bolts through the holes cut open, made ​​of quick-release flange.

A new hydraulic fittings and problems to improve

New rapid fittings, its advantages are: easy accessibility, connections are secure , reliable sealing, small size . However, the process used in the field , there are individual problems , especially for the following description and analysis. 2 connector and pipe fittings Figure 1 shows the structure of the connecting pipe is not turned on their structure diagram . The overall structure of the pipe for the connection , the overall structure of the outer pipe fittings threaded connection via a fixed piping , Hydraulic tube fittings  core 16 may be sliding around inside the outer tube is not connected to connector pin 16 under the action of the spring 3 ports sealed. Core structure diagram for the pipe joints for pipe outer tube structure diagram . 6 can move around in the jacket , from the reduction of the role of the ball , and stretch or compress the spring 7 ; ball 5 off when you connect a groove on the outer tube and the tube fittings securely attached ; retaining ring 4 restrictions Jacket the maximum protrusion amount ; outer tube 13 is threadedly connected and fixed to the joint core 11 ; fitting and piping connected to the fixed core 11 does not move ; inner sleeve 14 can be moved around , while the spring extension or compression,

High speed hydraulic coupling of the axial force

As a hydraulic transmission fluid coupling device has many advantages. Especially variable speed fluid couplings used in fans, pumps and other energy-saving effect is obvious on the device speed. When the fluid coupling work, will have a greater axial force, fatigue and accelerated bearing wear and shorten bearing life, thereby affecting the life of the machine. Fluid coupling impeller itself, there is no wear, its reliability and longevity is mainly determined by the bearings and seals. Therefore, the study axial force to improve the fluid coupling life and reliability is important. In this paper, the National High Technology Research and Development Program (863 Program) special issue "Large Hydraulic pipe fittings pump and fan speed control key technology research" (2007AA05Z256), using computational fluid dynamics numerical calculation method, the fluid coupling of the flow field and axial force calculation analysis to identify its variation, and the axial force were tested. Investigate the fluid coupling axial force influencing factors, and to analyze the axial force reduces fluid coupling measures. The main contents and conclusions are as follows: 1, fluid coupling theoretical analysis axial force axial force fluid coupling includes a pump wheel and turbine axial force to the force, they are working chamber and the auxiliary chamber axial axial force power of two parts.

Hydraulic coupling flow field simulation analysis method and its moment coefficient of

Fluid coupling is carried out using the kinetic energy transfer fluid hydraulic transmission machinery. Having a flexible transmission, cushion the impact, light-load start, overload protection, torsional vibration isolation, coordination and more balanced power machine drives and other outstanding features, widely used in shipbuilding, metallurgy, power generation, mining and other heavy industries. Through theoretical analysis and simulation technology research, to establish a fluid coupling flow field simulation analysis method, the fluid coupling torque coefficient λ_B theoretical research, combined with the flow field simulation results are summarized λ_B coefficient of variation of the speed n_B and apply JO65XR  Hydraulic tube fittings  coupling verified by experiments. The main contents are as follows. (1) hydraulic coupling flow field simulation analysis methods. First study the current flow field simulation analysis techniques, including turbulence model, mesh generation technology, the formation fluid coupling flow field simulation analysis methods to guide the process. Then the fluid coupling conditions and the flow field to make certain assumptions to facilitate geometric modeling. Combined with STAR-CCM + software, in-depth study fluid coupling dimensional flow field modeling and simulation methods and processes, including geometry, computational grid model, physical model settings, boundary conditions, convergence criteria, the results display.

Hydraulic coupling internal flow visualization and velocity Identification Method

Fluid coupling is mainly depend on the kinetic energy of the working fluid to pass and implement energy transformation hydraulic components. Fluid coupling as transmission components widely used in vehicle transmission, high inertia and high power device startup speed drive on. In many areas of the national economy in the fluid coupling has a broad application prospects. Internal flow fluid coupling is an extremely complex unsteady three-dimensional flow, the internal flow characteristics determine the fluid coupling of external performance. Strengthen internal fluid coupling characteristics of the flow field  Hydraulic adapters  coupling for improving the work performance, to ensure the safety and reliability of its operation is extremely important. With the development of modern science and technology, flow visualization techniques in the study of fluid flow inside the machine has made tremendous progress. Through flow visualization method can be visually observed picture of the internal flow fluid coupling and flow characteristics, can be qualitatively analyzed fluid coupling internal flow field distribution and flow parameters for identification and quantification of extraction. Meanwhile, the flow visualization and flow parameter identification results by the fluid coupling theory of flow field numerical provide test basis. In order to gradually improve the fluid coupling modern design methods, must pass this powerful flow visualization fluid coupling means to carry out the internal flow pattern of research, its internal flow identification,

Hydraulic coupling of CAD and its dynamic characteristics

Context for forklift hydraulic coupling for detailed research and analysis. The use of Pro / E modeling software and CFD flow field analysis software hydraulic coupling internal flow field numerical calculation, and the results were analyzed in detail. Get the fluid coupling output torque at rated conditions, and with the manufacturers should be provided for during the actual results were analyzed. Finally, the C programming language will be rated condition data expanded to the entire operating range. This specific study mainly the following aspects: (1) the use of Pro / E software, by simplifying assumptions, with the parameterization of the parts for  Hydraulic tube fittings  coupling modeling, assembly, and conduct interference analysis. (2) extracting section flow channel entities, binding studies that, according to theoretical calculations, the gambit meshing software, quality inspection, to determine the boundary conditions and the region. (3) the meshed model into fluent software for numerical simulation, the use of selected models and algorithms for filling rates were 80% and 30% of the two conditions is simulated, and according to the results of numerical simulation filling rate under different hydraulic coupling internal velocity field, the pressure difference, liquid, etc. comparative analysis and torque detected and compared with the experimental data,

A new hydraulic fittings and problems to improve

A new hydraulic fittings and problems to improve1 Introduction tubing and tubing fittings are , tubing and hydraulic components between the removable connector . Many different types of fittings , press fittings and tubing connections can be divided into flaring , welded , card sets ( bolts tight ) and so on. With the continuous development of hydraulic technology , people on the hydraulic lines and Hydraulic pipe fittings shave become increasingly demanding , specific requirements are: easy accessibility, connections are secure , reliable sealing, small size, through the oil capacity , pressure loss and technology is good and so on. Currently, almost no one pipe joint to fully meet the above requirements . Now in Germany a quick fittings , for example, analysis of its working principle , problems , and suggestions for improvement of the program . 2 connector and the pipe structure pipe connector and tubing is not turned on their structure

A new hydraulic fittings and problems to improve

New rapid fittings, its advantages are: easy accessibility, connections are secure , reliable sealing, small size . However, the process used in the field , there are individual problems , especially for the following description and analysis. 2 connector and pipe fittings Figure 1 shows the structure of the connecting pipe is not turned on their structure diagram . The overall structure of the pipe for the connection , the overall structure of the outer pipe fittings threaded connection via a fixed piping , Hydraulic ferrules  core 16 may be sliding around inside the outer tube is not connected to connector pin 16 under the action of the spring 3 ports sealed. Core structure diagram for the pipe joints for pipe outer tube structure diagram . 6 can be moved around in the jacket , from the reduction of the role of the ball , while stretch or compress the spring 7 ; ball 5 when connecting a tank down in the tube outer pipe and fittings securely attached ; retaining ring 4 restrictions Jacket the maximum protrusion amount ; outer tube 13 is threadedly connected and fixed to the joint core 11 ; fitting and piping connected to the fixed core 11 does not move ; inner sleeve 14 can be moved around , while the spring extension or compression,

Steering hydraulic pipe joints may be sealed structural improvements

Adjustable radial adjustable fitting the steering , the car, and some engineering machinery, hydraulic power steering system, since the space is small, can be widely applied to steering tube fitting. But because of some pipe joints sealed design is unreasonable , resulting in a hydraulic system leak or noise occurs . Our factory is a designated manufacturer of steering hydraulic pump , motor vehicles and some engineering mechanical power steering system that connects the pump and the tank connector to use more steerable bent joints in our service found that some manufacturers of pipe Hydraulic pipe fittings and pumps port connection is a combination of a sealing gasket used in the form of face seal fitting part shown in Figure 1 , the combination of the radial seal gasket will not achieve the seal , it can only play a seal . Therefore , the oil in the hydraulic screw down the connector locking nut from leaking outward , and are thus outside of the air into the pump , causing oil spills, noise failure.

Selection of hydraulic hose

Hydraulic hose systems commonly used in moving parts or vibrating portion pull the flexible connection, though there are already serialized standards and a professional factory in manufacturing , to meet the requirements of general use , but with the development of science and technology and cutting-edge fields pioneering  Hydraulic tube fittings hoses are also put forward higher performance requirements. If used improperly , it will actually run in debug or system failure caused female mouth tube bubbler , internal blocking , pipe rupture , fittings and connectors permeability shedding phenomena ) , and even a major accident . In order to ensure proper system operation, requires the correct selection , joint design is reasonable, inspection checks , ' _ installation and reasonable. This discussion applies to temperature, pressure, there are strict requirements of the use of harsh applications , can also be used for general applications. Hydraulic hose types can be divided into three types: , 1 ) metal hose , 2 ) rubber hose , 3 ) Teflon , and other nylon tube and so on. According to the system temperature , pressure, working on the medium were selected .

Analysis of hydraulic hose connector assembly structure and sealing performance

Analysis of hydraulic hose connector assembly structure and sealing performance in the hydraulic system of hydraulic hose assemblies to connect and play the role of conveying hydraulic oil , hydraulic system known as " blood ." However, since the structure of the hydraulic hose assembly and manufacturing is relatively simple , it is not been adequate attention , are often unreasonable or processing and assembling structural design of mistakes, so that product quality is poor, affecting the host to use. Hydraulic hose assembly connector part by the joint core , jacket, union nut and hose components. Connector nut is coupled with supporting host , will not be discussed here . Common  Hydraulic hose fittings hose assembly broadly divided into two structural forms: the first joint portion of the structure is determined by a smooth cylindrical jacket and a small cone -shaped core and hose fittings composition ( Figure 1 ) . Figure 1 of this structure fitting jacket , the core processing is simple, easy to assemble , process performance, suitable for mass production . Hose connector is to rely on the hose connector core diameter hose up volume and coat on the outside diameter of the amount withheld to form a seal . Small cone -shaped connector core mainly by a small section of the cylindrical surface of the cone and form a seal .

Hydraulic hoses must pay attention to the matching problem with the system oil

There any hydraulic system oil hose material matching problem with the system . Such as matching improperly nuclear a system malfunction. Such as: petroleum based hydraulic oil will soon make it with ethylene, propylene, diene material qualitative change of the hydraulic hoses , hose damage resulting eve channel blocking , equipment failure , reduced productivity , increased maintenance costs , etc. These are hydraulic hose material and system oil mismatch results. This article will help the system designer or so . A  Hydraulic pipe fittings hoses and systems to choose matching relationship between oil , in order to ensure the reliability and life of the hydraulic system . First, the hydraulic parts of the type of material of soft neoprene used in the hydraulic hoses common synthetic materials . It consists of a large family composed of a polymer having some characteristics similar to natural rubber and oil , antioxidant, anti-burning characteristics. Orange ratio and natural rubber , the edge of the former has a better appearance , easy to deformation when heated , and good corrosion resistance and other properties. Originally used petroleum oils wave pressure rubber hose material eleven Sui , is a polymer which has excellent corrosion resistance. Grasping Sulfonephthalein polyethylene synthetic rubber ( Hypalon ) is an affordable rubber material, it can meet a variety of different formulations of the actual needs ' , such as: excellent resistance to oxidation , corrosion , abrasion , heat , anti- burning , cracking

Use and repair of hydraulic hoses

Hydraulic hose from the high pressure steel wire braided hose and fittings components. Common damaged hydraulic hoses and fittings are bursting slider or ball nut sealing surface is damaged and so on. A hydraulic hose burst reasons (l) hydraulic hose aging, cracks, or due to prolonged sun exposure . Exposure to gasoline , diesel , etc. , so that the hose corrosion damage. ( 2 ) farm tools and other elevated to the transport position after high-speed driving on uneven pavement , hanging body severe turbulence generated in the high-pressure hose several times larger than the original shock loads , then the safety valve in an instant and hard work, forcing the soft pipe burst. ( 3 ) improper installation of  Hydraulic tube fittings hose , because twisted, bent , wire layer abrasion , corrosion or partial overload and burst . ( 4 ) error using ' punch up " position . Operating tools and downs due to the uneven ground , in the" neutral "position, the cylinder piston pressure generated by the movement over the hose pressure capacity and rupture. ( 5 ) safety valve opening pressure adjusted high , long-term overloading hydraulic hose burst . ( 6 ) automatic return mechanism distributor disorders, joystick can not jump back in time "neutral " position , the operator without promptly pulled the hose to withstand greater loads arising from prolonged burst 2. pipe joints causes of damage (l) slider nut and sealing surfaces for damage .

Construction machinery hydraulic hose assemblies used

Department of Construction machinery hydraulic hose assembly hydraulic system of hydraulic components mainly due to improper selection and use of frequent failure, or even result in long-term shutdown the host . Feedback information from the user , and often reflect these problems . To this end , construction machinery hydraulic hose assembly between the selection and use of questions drawn increasing OEMs , supporting plant and the user 's attention. A hydraulic hose assembly composition and type of a  Hydraulic hose fittings hose assembly hydraulic hose assembly consists of the composition of hydraulic hose ( or resin hose ) and metal fittings components. Hydraulic hose from the outer layer , reinforcing layer and the inner layer composition. The inner layer in contact directly with the hydraulic pump , generally small wax rubber , the long-term corrosion from the fluid state , to leak-proof, the enhancement layer is the skeleton of the hydraulic hose , mainly from the effect of pressure , the outer layer adhered to the enhancement layer protective effect on the general use of polybutadiene rubber grip and prevent the aging cracking. Metal fittings from the joint core , nuts and coat composition. (2) according to the type of hydraulic hose assembly hydraulic hose with metal fittings are connected not wait , can be divided into removable and withholding , withholding type can be divided into Straight and elbow -type , according to the form of enhancement layer different

Hydraulic hose repair

Hydraulic hose easily damaged , and the price is higher, the use of a homemade hydraulic hose fittings to repair , not only less expensive , but the effect is good, not leaking. A self-made special tools use a small tube cutter , the original cutter and two rollers Remove separate custody . 3 turning roller of the same size , the inner diameter Hydraulic pipe fittings  same as L and the original sub- rollers , the other dimensions shown in Figure 1 . Tian l 3 wheeler press had made ​​a good future, with the original screws and roller cutter in the original position. 2 hose Juan ; repair by a ( 1 ) oil spill at the hose sawn, remove breakage . ( 2 ) car manufacturing an inner core as shown in Figure 2 , the same diameter and inner diameter of the hose , the inner core can manually insert the hose , but requires a certain degree of tightness . Each end of the core about 80 mm. Mild steel car system two identical outer diameter of the hose iron pipe , wall thickness 2 mm , about 80 mm . ( 4 ) First iron pipe set in the outer hose and hose cutouts , measure the position of the inner core chamfering and recorded , and then insert the hose

Hose in the assembly process , several issues need attention

 Hose in the assembly process, but also need to pay attention several issues hose is too long, to increase purchasing costs ; hose is too short , when the pressure and stretch or shrink , the expansion is not enough headroom , damage cause abnormal hose ; hose assembly , do not let it distort , or significantly reduce the hose life and even cause damage to Hydraulic tube fittings  hose or cause abnormal joint of loose ; apparatus for moving parts between the hose, should be set aside sufficient length , and to prevent friction and other objects . If the hose in the use of frequent friction with the hard phase , it is recommended to install a spring jacket tube

Correct choice of hydraulic hose

The correct choice of hydraulic hose, to the entire hydraulic system can work , and corporate procurement costs. Therefore, the choice should make reference to the hydraulic hose assembly equipment maintenance manuals, and focus on the following aspects: Depending on the device working conditions ( temperature ) and the hydraulic medium situation , choose the right hose . Hose Working environment temperature is too high or too low will affect the life of the hose and pressure capability , which allows it to be used within the scope of the hose , long-term working temperature is not within the scope of its allowed system should be used hose jacket or purchasing special hose . If special media , make sure the hose inner and outer , fittings, and seals compatible with the media  according to the system pressure , determine the maximum  Hydraulic tube fittings working pressure hose . Each hose has a maximum working pressure of the hose burst pressure of 3-4 times the maximum working pressure . Hose pressure is higher, the higher the price , so the actual pressure based system , select the maximum working pressure of the hose , which can ensure the normal operation , but also save procurement costs. If the system impact pressure frequently , you should use a higher pulse life hose , and should choose an appropriate  Hydraulic hose fittings increase in the maximum working pressure of the hose . according to the flow selector hose diameter, tube diameter is too small will increase the flow rate of the medium , the system heat, reduce efficiency , and will produce excessive pressure drop , affecting the overall system performance , the diameter over the General Assembly to increase procurement costs and affect the normal operation of the system , so the hose diameter to be appropriate. When the hose pipe or hose clamp through the plate , they should also pay attention to the outside diameter of the hose .the choice should be aware of when high pressure hose high pressure hose bend radius , bend radius should be calculated by subtracting the length of the front connector crimping . If the device hose bend radius is too small, will reduce the ability of the pressure hose and reduce  the arrangement should be based on rational use of hydraulic fitting manner , the joint angle and hose assembly mounting angle.

How to choose the correct hydraulic hose assembly

High pressure hose is a modern industrial equipment, construction machinery parts in the important convergence of one application in hydraulic systems is very commonHydraulic hose is a modern industrial equipment, construction machinery is one of the important pieces of convergence in the application of the hydraulic system is very common. The tube has to withstand medium pulse pressure and protect the wire from erosion effects; outer layer to protect wire from damage; wire (ф0.3-2.0 enhancement layer) layer is a reinforcing material from the enhancement. Wires of the layer structure (woven / wound) and a different number of layers, Hydraulic hose fittings  pressure hose is different, from one layer to the wires of the layer 6 layer to reach maximum pressure 90MPA, or even higher. Hydraulic hose for conveying hydraulic fluid, hydraulic oil, fuel oil, lubricating oil, emulsion, aqueous solution of ethylene glycol and water. Common hose suitable working temperature: steel braided hose -40 ℃ - +100 ℃, wire winding hose -40 ℃ - +120 ℃, working conditions or higher than this temperature range transport special media, please choose the appropriate specialty hose.

Explain the seal of the sealing principle

Explain the seal of the sealing principle. That the seal (rotating dynamic seal) sealing machine, and sealing principle reason lubrication characteristics of two parts. Lubrication: oil seal friction characteristics are affected by the viscosity of the fluid and the sliding speed control, the relative sliding of the shaft seal surfaces separated lubrication oil film of moving, so keeping friction, wear small. Sealing principle: the sliding contact surface of the seal oil flow from the atmosphere side  Hydraulic ferrules  oil side and from the oil side to the atmosphere side of the loop. The sliding surface lubrication, prevent wear and tear, thus there is no leakage. When moving speed is too high, the impact of a continuous lubricating film formation, resulting in frictional heat increases the temperature range beyond the seal material is caused by damage to the seal. Pressure is too large, in addition to affecting film formation, but also on the rubber seals have a "squeeze gap" effect, generally can be added, "ring" to improve. Or select a low coefficient of friction, good self-lubricating PTFE seals portfolio structure will help to improve the lubrication between the friction, suitable for high speed and high pressure systems reciprocating cylinder piston, the piston rod seal. Depending on the system environment, working conditions and a reasonable selection of media seals and sealing materials, proper installation and maintenance of seals, is to obtain effective sealing effect, reliability and service life of the key.