What are the requirements for the installation of high-pressure rubber hoses
Time:2022-08-01Page views:4406When installing rubber hoses, try to avoid heat sources and stay away from the engine exhaust pipe. If necessary, a sleeve or protective net can be used to prevent the hose from deteriorating due to heat. When the high-pressure hose needs to pass through or may rub against mechanical surfaces during operation, protective devices such as hose clamps or springs should be used to prevent damage to the outer layer of the high-pressure hose.
When bending high-pressure rubber hoses, the bending radius should not be too small and should be greater than 9 times the outer diameter. The connection between the high-pressure rubber pipe and the joint should have a straight section that is twice the outer diameter of the pipe and should be installed under tension. Even if there is no relative movement between the two ends of the hose, the hose should remain loose. The tensioned hose will expand under pressure, and its strength will decrease. Do not twist the high-pressure rubber hose during installation, even slight twisting may reduce its strength and loosen the joint. When assembling, the joint should be fastened onto the hose, not onto the hose.
In terms of work pressure, high-pressure rubber hoses must withstand a certain amount of pressure when transporting materials due to factors such as material flow rate and the inner diameter of the hose. This pressure can be divided into positive pressure and negative pressure. So hoses are generally divided into low-pressure hoses and high-pressure hoses. The rated working pressure of the purchased high-pressure hose should be greater than the actual working pressure during use, because once the pressure exceeds the larger working pressure of the high-pressure hose, it will cause damage to the high-pressure hose, which may lead to rupture, breakage, or even serious breakage.
In terms of appearance, high-pressure hoses are generally straight in shape, while other shapes of high-pressure hoses are collectively referred to as irregular hoses. A straight pipe is a high-pressure rubber hose with no bending of the entire pipe body and no significant change in inner diameter. Irregular pipes refer to high-pressure rubber pipes other than straight pipes, such as variable diameter pipes with changes in inner diameter, flat bent pipes with flat bends, and partially three-dimensional bent pipes. When using it, we must choose a high-pressure hose with a suitable shape. Otherwise, if the hose is forcefully bent, the wall of the high-pressure hose may be damaged, and the pressure in various parts of the hose may also change, possibly exceeding the designed working pressure range of the high-pressure hose.
As for the length of the high-pressure rubber hose, we all know that it cannot be used decisively, but some people think that it doesn't matter if it is too long. But in reality, this is a wrong idea. An excessively long high-pressure hose will inevitably bend during use. Even if the bending degree of the high-pressure hose can withstand it, the pressure at the bend of the hose body will increase to a certain extent when conveying materials. Therefore, the working pressure that the high-pressure hose can withstand in its normal form may not be able to withstand during bending.