1、 Poor manufacturing quality

high pressure Sandblasting pipe The inner and outer layers of the wall are oil resistant rubber, and the middle layer is (2-4 layers) cross braided steel wire or winding steel wire. Poor quality Sandblasting pipe There will be: uneven thickness of the hose wall; The steel wire braiding is too tight, too loose or the number of steel wire layers is too small; Sandblasting pipe The deformation (elongation, shortening or bending deformation) after compression is large; The poor air tightness of the outer layer leads to the corrosion of the steel wire; The poor sealing of the inner layer glue makes the high-pressure oil easily enter the steel wire layer; The adhesive force between adhesive layer and steel wire layer is insufficient. The above conditions will reduce the bearing capacity of the hose, and eventually burst at the weak part of the pipe wall.

Sandblasting pipe Improper selection of the amount and speed of crimping when assembling with the joint, or unreasonable selection of the structure, material and size of the joint, can lead to too tight or too loose pressure between the hose and the joint, resulting in early damage at the joint.

During assembly, if the amount of crimping is too small, that is, if 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 the amount of buckling is too large, the joint and the rubber hose are pressed too tightly, which is likely to cause local damage to the inner layer of the rubber hose, causing cracks. High pressure oil will enter the steel wire layer directly from the crack, and then move along the gap between the steel wires to the tail of the jacket, or move along the steel wire layer to a certain place to accumulate, causing the outer layer of rubber to bulge or even break. During the assembly of rubber hose and joint, if the buckling speed is too fast, it is easy to damage the inner rubber and break the steel wire layer Sandblasting pipe Premature failure in use.

In addition, unreasonable joint design and poor processing quality will also cause damage to the inner rubber; If the joint material is improperly selected, it is easy to deform in the process of crimping, thus affecting the quality of crimping Sandblasting pipe The life of is shortened.

2、 Improper use

Under the premise of quality assurance, if used improperly, it will also be greatly shortened Sandblasting pipe Service life. In practice, most of the high voltage Sandblasting pipe The damage of is caused by improper use.

It is subject to frequent and severe pressure impact. high pressure Sandblasting pipe Bursting is generally not caused by too much static pressure, but is related to the intensity and frequency of pressure shock. During the operation of construction machinery, the sudden increase or decrease of oil pressure in the oil pipe will occur repeatedly, which will result in frequent pressure impact on the oil pipe, leading to increased oil seal damage in each part Sandblasting pipe Bubbles and cracks as well as looseness and leakage of pipe joints occur. Therefore, during operation, the valve rod shall not be pulled too hard, and must be gentle.

The operating temperature of the oil is too high. During the operation of construction machinery, the hydraulic system heats the oil due to power loss, and the influence of external temperature (especially in summer) can make the oil temperature rise sharply. The higher the oil temperature is, the easier the rubber is to age, the worse the elasticity, and the lower the strength and sealing performance, Sandblasting pipe It will burst soon. Therefore, when the temperature rise of the hydraulic system is too high or too fast during operation, the causes should be found out and eliminated in time; Necessary cooling measures shall be taken for operations in summer, especially continuous operations.

Sandblasting pipe The selection and installation are unreasonable. When replacing the high-pressure rubber hose, the length of the selected rubber hose, the number of steel wire layers, the shape and size of the joint should be reasonable, and the bending degree of the rubber hose should be minimized; When tightening the joint nut, do not twist the hose. Excessive bending and twisting will greatly reduce the service life of the hose; Protective measures shall be taken for parts prone to friction to prevent hose from bursting due to wear.