Problems encountered in the use of acid and alkali resistant hoses?

 

The following problems may occur: bulging, puncture and joint dislodging. However, no matter what damage is caused, the damaged area must be cut off during the repair process, and then repaired by retightening the joint. The acid and alkali resistant hose joint consists of a mandrel and a jacket.

 

The following mainly introduces the problems that need to be paid attention to in maintaining the acid-base hose.

 

1. The inner layer of acid and alkali resistant hose

 

The mandrel is usually in the form of a reverse pull, the main purpose of which is to increase the firmness of the connection between the mandrel and the hose. After the barb machining of the mandrel is complete, the barb tip must also be blunted. Otherwise, the barbed tip will pierce the lining material of the acid and alkali resistant hose during the crimping process. Even if the acid and alkali resistant hose joint is fastened, if the inner layer is damaged, high-pressure water will leak from the crimping place.

 

2. Selection of acid and alkali resistant hose materials

 

Mandrels and jackets must be of different materials. Their strength and plastic deformation should be different. The outer sheath should be less strong than the mandrel. The purpose is to make the outer layer easier to deform than the mandrel and to increase the firmness and reliability of the retaining ring, and the anti-corrosion performance requirements of the mandrel should also be considered.

 

3. Master the strength of withholding

 

Before crimping, it is necessary to make a mandrel that is slightly thinner than the inner hole of the mandrel. When crimping, apply a little oil to the mandrel and insert into the inner hole of the mandrel. The proper force is to withdraw the mandrel. This can avoid the phenomenon that the diameter of the inner hole of the mandrel is reduced or even blocked due to the excessively large pressure path of the retaining ring, and can also ensure that the joint can be fastened without falling off.

 

Today, acid-base hoses have been widely used in all walks of life. The working conditions of the acid-base hose are relatively poor, and it is a link that is easily overlooked. Therefore, we must pay attention to the selection, use, maintenance and repair of multiple links.