2022-11-12

There are many kinds of rubber hose structures, which can be distinguished according to different uses. They are mainly used in hydraulic and electrical equipment, such as brake lines of automobiles, hydraulic pumps, and internal drive lines of pumps, which can prevent impurities inside the lines Enter the hydraulic system, thereby preventing the pollution of the oil circuit and improving the reliability of the hydraulic system. At the same time, it can also prevent the fluid inside the pipeline from being blocked due to contamination by impurities. So if it is necessary to install rubber hoses outdoors, how to choose high-pressure rubber hoses? There are many kinds of rubber hoses on the market, including hose hoses, ordinary hoses and high-pressure rubber hoses. However, due to its different application fields, we should also choose some suitable rubber hoses according to the application occasions when choosing, such as some high-pressure hoses, ordinary hoses, etc. are all types of rubber hoses. So how do we choose high-pressure hoses when we make choices?

Select according to the application field
High-pressure rubber hoses are used in hydraulic pumps and hydraulic piping systems. Therefore, when we choose, we must choose according to the application field, and we must not choose blindly. Because the rubber hose is an elastic element, it has its own unique characteristics. When it is subjected to external influences, it will cause deformation or damage of the hose. Therefore, when we choose, we must choose high-pressure rubber hose according to its characteristics.

Select according to the material and shape of the high-pressure rubber hose
Generally, the high-pressure rubber hose is mainly composed of middle rubber, inner rubber hose, and outer steel wire layer. Its material is mainly vulcanized rubber or nitrile rubber, and its shape is mainly tubular and conical. However, due to the different degrees of physical, chemical and mechanical properties produced by various rubber materials during processing, the design of vulcanized rubber or inner rubber hose must be vulcanized according to different service conditions. When the vulcanization temperature is too high or too low, the method of reducing the vulcanization temperature can be used to reduce the degree of shrinkage deformation during compression deformation; but when the vulcanization temperature is too low or too high, it will cause the rubber layer of the inner rubber hose to age and deteriorate, thus The phenomenon of aging, deformation, cracking and other phenomena of rubber materials occurs. And when the vulcanization temperature is too high or too low, these problems will also occur: after vulcanization, the metal sulfide and the rubber hose will have a chemical reaction, and then the rubber vulcanization will decompose to produce incomplete vulcanization (incomplete vulcanization) in the rubber The formation of solid particles leads to fracture and cracking; when the rubber hose is stretched, a large amount of gas will be generated on the inner wall of the stretched tube core; the air enters the rubber tube and destroys the chemical action of the glue in the air, which causes a large amount of glue to leak out and cause sulfide pores Blockage will cause aging and cracking; when the compressed rubber tube is mixed with water or other substances, it will cause water droplets and foaming in the tube body, and as the medium in the tube circulates, bubbles and other defects will occur. Phenomena such as aging and hardening form cracks (that is, rubber soft aging).

Select according to the pressure of the high-pressure rubber hose
The pressure grades of high-pressure rubber hoses and ordinary rubber hoses are different. Generally, the higher the pressure grade, the higher the applicable pressure, and the harsher the working environment; the higher the high-pressure speed, the higher the applicable pressure. high. For example, in the industry, the pressure of the rubber hose commonly used for high-pressure drive is 1.5-2bar; 10 bar. And as the pressure increases, the service life of the rubber hose increases accordingly, so in general, if the working pressure of the high-pressure rubber hose is less than 5bar, its service life is longer; otherwise, the service life is shorter; However, if the working pressure is greater than 5bar and the rubber hose itself has aging problems or is improperly installed and causes the rubber hose to rupture, it will cause the rubber hose to be unable to use normally or even damage the machine or personal safety is at risk. Therefore, in order to increase the working pressure, reduce the service life and avoid the danger of accidents, it is necessary to choose according to the actual situation.