Have the PVC Braided Hoses been Maintained Correctly?
Hydraulic hose outer layer failure
1. Cracks appear on the outer surface of the hose: In a cold environment, cracks appear on the outer surface of the hose, which will cause the hose to be bent. 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. Bubbling appears on the outside of the hose: bubbling occurs on the outside of the hose because the quality of the hose is unqualified or improperly used. 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 seepage, 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 rubber layer outside the rubber layer is seriously deteriorated, the surface appears micro-crack: this is the performance of the hose is too long to use natural aging. 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.
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