Hose not adapted to ambient temperature

Due to the unsuitable selection of hose, the rubber hose in the low-temperature environment when working under the operation or bending Cracks appear when operating or bending in low temperature environment; rubber aging phenomenon appears when working in high temperature environment. Aging phenomenon.

Treatment: the machine works in cold environment, should use low temperature resistant hose, the hose itself should be better than the temperature of the environment; machine in the high temperature environment, should use high temperature resistant hose, the hose itself should adapt to high The temperature should be greater than the ambient temperature.

Bulging of the outer cladding

If the bulge appears in the middle part of the hose, it is mainly due to the production of the hose quality problem; if the bulge appears near the joint of the hose, it is mainly due to improper installation of the joint. improper installation.

Treatment: bulging, the hose should be replaced in a timely manner, and hose factory and communicate with the hose manufacturer to control the quality of the hose product, while curing the site assembly and buckling process, to ensure that the quality of raw materials and assembly and buckling of the hose requirements.

Oil seepage at the bend of the outer cladding

Oil seepage at the exterior bend of the hose may be caused by the following reasons: one of them is The actual working pressure of the hose is too high to accelerate the damage of the inner rubber, and the excessive The oil pressure inside the tube is too high, which causes the synthetic rubber of the inner lining layer to be washed out, and the rubber will be washed out continuously during the long-term work. The rubber will be washed off continuously in the long-term work, thus appearing the phenomenon of oil seepage at the bend of the outer surface; its Second, the bending radius of the hose is too small is the main cause of this failure, if If the actual bending radius of the hose is less than its minimum bending radius, it will accelerate the If the actual bending radius of the hose is less than its minimum bending radius, the damage of the hose will be accelerated, thus leading to oil seepage.

Treatment: Oil seepage should be replaced in time. Hose in use The bending radius in use is greater than the minimum bending radius specified to ensure smooth bending. The actual working pressure of the hose should be less than the maximum working pressure of the hose. If the pressure is too high, it will cause the hose to burst. Therefore, when selecting the hose, it is recommended that the maximum working pressure of the hose is 1.33 times of the actual working pressure. Therefore, when selecting the hose, it is recommended that the maximum working pressure of the hose is more than 1.33 times the actual working pressure to ensure safety.

Cracking of the outer cladding

Cracking on the outer surface of the hose is a manifestation of the aging of the hose, which has a lot to do with the quality of the hose manufacturer. As the outer lining layer of synthetic rubber is less resistant to integrated media, making the outer surface easy to age and deteriorate. A long time of exposure to its deterioration accelerated, the hose in motion or bending, the surface It will crack.

Treatment: If the surface of the hose is aging and cracking, the hose should be replaced. Hose The outer lining layer should choose synthetic rubber which is oil resistant, wear resistant and resistant to all kinds of media. The demand side and the supply side should reach an agreement to ensure that the hose meets the requirements of the working environment where the whole machine is located. The demander and the supplier shall agree to ensure that the hose meets the life requirements of the working environment where the machine is located.

The failure analysis and treatment of the outer cladding is basically the above 4 cases. In the following articles, we will analyze several other cases in detail. If you have other questions, please feel free to contact us.

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