Hydraulic hose assembly is the basis of hydraulic system components

Hydraulic hose assembly is the basis of hydraulic system components. Various hydraulic system is mainly used in construction machinery , metallurgy, mining machinery, and easy installation and removal of the . It is composed of high-pressure steel wire braided or twisted hydraulic hose assembly and steel fittings made ​​by special equipment withhold conduct hydraulic power transmission or conveying water, gas, oil pressure medium to ensure circulation of the liquid and transfer the liquid energy.
Hydraulic hoses need proper protection. Due to the complexity of hydraulic hose varieties , structural diversity, coupled with different conditions , so the length of life , not only on their quality , but also depends on the proper use and maintenance . So even if the product has high quality , if not properly used and maintained , will seriously affect the quality and longevity of its use , even a serious accident should not have occurred , causing damage to property . First of all, dedicated specifically to deal with . hydraulic hose assemblysand hose assembly can only be designed for transporting materials , other materials can not be used to send . Secondly , the use of the pressures within the . Hose and hose assembly should not be used in excess of the design working pressure ( including shock pressure ) . Third, the transportation of materials moderate temperature . Under hose and hose assembly conveyed medium temperature normal circumstances, should not exceed -40 ℃ - +120 ℃. Fourth, given the appropriate use of space hose , not bent. Hose and hose assembly should not be less than the minimum bend radius under the hose , to avoid bending or folding occurs near the pipe joints , otherwise it will impede hydraulic transmission and delivery of materials or damage to the hose assembly. Finally , keep the hose clean. Hose and hose assembly should be kept clean , inside should rinse ( especially acid output tubes, spray tubes, mortar tubes ) . To prevent foreign objects into the lumen , hinder the transport fluid , damage to the device .

Many factors will affect the use of hose assembly

Many factors will affect the use of the hose assembly. The first is the size of the hose. Inner diameter of hydraulic hose assemblysto the right, if it is too small, will affect efficiency. If the inside diameter is too large, will affect the overall system performance of the play. Therefore, it is important to select the appropriate inner diameter. Second, hydraulic hoses will also affect the temperature range of use. If the hydraulic hose working environment temperature exceeds the specified range, then the hydraulic hose pressure capacity will thus be greatly reduced. Experts suggest that if the high or low temperature working environment, should be put on the hydraulic hose jacket. In addition to the above two factors, the use of hydraulic hose assembly Hose working pressure is also affected by the impact stress and fatigue life, impact bending radius and chemical compatibility and other factors.
Hydraulic hose assembly in our lives is very wide, in the mining industry, agriculture and industrial sectors have a lot of use. It is transmitted through water and gas or oil substance hydraulic power to ensure adequate fluid energy during operation.

By utilizing high pressure hose and connector assembly and buckling mode selection is improper

By utilizing high pressure hose and connector assembly and buckling mode selection is improper. Or joint structure, material, size selection is not reasonable, can lead to joint and hose pressure too tight or too loose, causing joint early damage. The assembly, if the withholding amount is too small, crimping connector and hose pressure hydraulic flangestoo loose, under the action of oil pressure hose disengages from the joint may at the initial stage of use; if the withholding amount is too large, then the buckling pressing joint and hose pressure too tight, easily lead to hose inner layer by local damage, deformation, produce crack, high pressure oil from weak, rupture directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of the hydraulic tube fitting drum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use. In addition, the joint design is not reasonable, Jerry, the processing quality is bad, can also cause the glue in the joint damage; if the improper material selection, not up to the high pressure hose assembly requirements. Will shorten the service life of the high pressure hose.

The inner wall of the high pressure hose for oil resistant rubber

The inner wall of the high pressure hose for oil resistant rubber, the middle braided wire (steel wire braided hose) or winding steel wire (wire wound hose)
The inner wall of the high pressure hose for oil resistant Hydraulic pipe fittings, the middle braided wire (steel wire braided hose) or winding steel wire (wire wound hose). The poor quality of the hose will appear: tube wall is uneven; steel wire braided tightly (wire small stroke), too loose (steel large stroke) or the number of the steel wire is too small; hose compression deformation (elongation, shortening or bending deformation (national standard) larger wire stroke control within plus or minus 3); the outer layerhydraulic hoses air tightness differences lead to corrosion of the steel wire (main forms: bare wire); the inner layer glue sealing difference and make the high-pressure oil easily into the wire layer; adhesive layer and the steel wire layer adhesion deficiency. This will make the hose to bear force is reduced, finally appear in the weak point of tube wall burst. Especially in the inner layer, poor air tightness of words, a compression, it Water Leakage, then directly burst pressure.

Because plastic coated hose connector design unreasonable phenomenon caused by the failure

Pack plastic hose connector design is essential, which is the core technology of hose assemblies. In actual operation, including plastic Hydraulic adapters connector design is often not a good grasp of various key points, it will cause a variety of failures. Because plastic coated hydraulic hose assemblys connector design failures caused by the unreasonable phenomenon is most prevalent are withheld at the inner tube longitudinal cracks appear and circumferential cracks are two, there are other symptoms, but not common. There are the following two: 1 withhold longitudinal cracks appeared at the inner tube site withhold the end of the sleeve, the inner tube vertical microcracks appear, once a crack running through, it will result in failure of two hydraulic tube fitting assemblies withheld at the inner tube circumferential cracks appear in actual use, and the testing process is also one of the more common symptoms. Inner tube circumferential cracks appeared after the weak link here will become, along with the gradual extension circumferential cracks, often in the form here leak, resulting in failure of hose assemblies.

Butt weld dissimilar metal joints

Dissimilar metal joints or butt weld two different metals from the base material welded directly or using the first isolation layer added, after the method of welding, in the latter case, the spacer layer and a joint assessment of the welding process can be performed hydraulic flangesimultaneously .Taking into account the performance of existing materials, in all cases, especially in the cut specimen should be cut so that the specimen should be able to reflect the characteristics of each connection area and observe the following precautions:Transverse weld test should have been done the base material, the isolation layer (if any) and weld hydraulic fittings. Bend test shall be to make the fusion line, the isolation layer, deposited metal under stress manner. The number of samples and sampling method with the joint geometry should change.