Why is the high pressure oil pipe damaged?

(1) The inner and outer layers of the high-pressure hose wall are made of oil-resistant rubber, and the middle is (2 to 4 layers) of cross-braided steel wire or wound steel wire. Poor quality hose will appear: the thickness of the hose wall is uneven; the wire braid is too tight, too loose or the number of steel wire layers is too small; the deformation of the hose (elongation, shortening or bending deformation) after pressurization is large; the outer layer of rubber Poor air tightness leads to corrosion of the steel wire; poor sealing performance of the inner layer of glue makes it easy for high-pressure oil to enter the steel wire layer; insufficient adhesion between the glue layer and the steel wire layer. The above conditions will reduce the bearing capacity of the hose, and it will burst at the weak point of the pipe wall.

(2) Improper selection of the amount of crimping and crimping speed when assembling the hose and the joint, or unreasonable selection of the structure, material and size of the joint, can cause the hose and the joint to be pressed too tightly or too loosely, resulting in early damage to the joint. During assembly, if the crimping amount is too small, that is, when the pressure between the joint and the hose is too loose, the hose may come out of the joint at the beginning of use under the action of oil pressure; If it is too tight, it is easy to cause local damage to the inner layer of the hose and cracks. , causing the outer layer of rubber to bulge or even rupture. When the hose and the joint are assembled, if the crimping speed is too fast, it is easy to cause damage to the inner rubber and rupture of the steel wire layer, which will cause the hose to be damaged prematurely in use. In addition, the unreasonable design of the joint and the poor processing quality will also cause damage to the inner rubber; if the material of the joint is not properly selected, it is easy to deform during the crimping process, thereby affecting the crimping quality and shortening the life of the hose.