Common faults in hydraulic hoses and emergency treatment methods（1）

 Failure of the outer rubber layer

1.Cracks appear on the outside of the hose: In a cold environment, cracks appear on the outer surface of the hose. If there is a crack on the outside of the hose, pay attention to whether the glue inside the hose is cracked and decide whether to replace the hose immediately. Therefore, do not move the hose or disassemble the hydraulic system in a cold environment, and if necessary, indoors. If you need to work in a cold environment for a long time, you should replace the cold-resistant hose.

2. There is bubbling on the outside of the hose: the appearance of bubbling on the outside of the hose is due to the unqualified quality of the hose or improper use. If the bubble appears in the middle of the hose, mostly the quality of the hose production, the qualified hose should be replaced in time; if the bubble appears at the joint of the hose, it may be due to improper installation of the joint. The wire braiding, winding hose joint and hose connection end are detachable and buckled. The detachable joint shell and the joint core have a hexagonal shape, and the outer wall of the joint core has a conical shape, which is convenient for disassembling the hose. After the joint core is connected to the nut, the wire is inserted to prevent loosening. The crimping type hose joint is composed of a joint shell and a joint core. The outer rubber layer is peeled off during assembly, the sleeve is connected to the core head, the joint jacket is tightened, and then the mold is pressed on the special equipment to obtain a certain compression amount to achieve tightness. connection.

3. The hose is not broken but a large amount of oil seepage: If the hose is not found to be broken but a large amount of oil seeps, the reason is that when the hose passes through the high-pressure liquid flow, the inner rubber is washed away and scratched until a large area leaks out of the steel layer. Seepage oil. This failure generally occurs at the bend of the pipe. Check the replacement hose and ensure that the bend radius of the hose meets the technical requirements during use.

4. The outer rubber layer of the hose is seriously deteriorated, and the surface is slightly cracked: this is a manifestation of the natural aging of the hose for a long time. Due to aging deterioration, the outer layer is continuously oxidized to embrittle the surface layer. As the embrittlement layer deepens with time, the hose is slightly bent when used, and microcracks are generated. In this case, the hose should be replaced.