2013年9月29日星期日

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.

2013年9月28日星期六

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."...