Quick maintenance method of cartridge valve in hydraulic oil cylinder

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a quick maintenance method of a cartridge valve in an oil hydraulic cylinder. A gate valve comprises a valve body, a valve element and a spring. The valve body is internally provided with a spring mounting groove, and the spring is arranged in the spring mounting groove. The upper end part of the spring is connected to the top surface of the inner wall of the spring mounting groove, and the lower end part of the spring is connected to the top of the valve element. During quick maintenance, firstly, the gate valve is disassembled, the lower end of the spring is separated from the top of the valve element, then pad plates are arranged at the top of the valve element, finally, the pad plates are connected to the lower end of the spring, and the gate valve is assembled, after the gate valve is assembled, the pad plates are all located in the spring mounting groove. By arranging the pad plates, the spring is compressed more tightly when the valve element is pushed out for use, the pressing elasticity is increased, it is ensured that the valve element has good sealing when used, the requirements forthe use of the gate valve are met, and moreover, the quick maintenance method is quick in repair, high in efficiency, low in cost, simple and practical.

Description

Technical field [0001] The invention relates to the technical field of hydraulic oil cylinders, in particular to a quick maintenance method for a cartridge valve in a hydraulic oil cylinder. Background technique [0002] A cartridge valve is provided in the hydraulic cylinder. The function of the plug-in valve is to push out the spool of the plug-in valve after the hydraulic cylinder stops, and the spool is fixed by the elastic force of the spring to lock the cylinder and make the piston rod stand still. status. After the hydraulic cylinder is used for a certain period of time, especially when the piston rod is connected to a relatively large load, the piston rod will slowly drop and other problems, which affect the use of the hydraulic cylinder. Through the inspection, one of the reasons is that the elastic force of the spring is weakened, which makes the valve core seal poorly, causing the piston rod to slowly drop. At present, after the above problems occur, it is basically ...

AI Technical Summary

Problems solved by technology

When the hydraulic cylinder is used for a certain period of time, especially when the piston rod is connected to a relatively large load, the piston rod will slowly drop and other problems, which will affect the use of the hydraulic cylinder

Through inspection, one of the reasons is that the spring force is weakened, which makes the sealing of the valve core not good, which causes the piston rod to drop slowly.

At present, after the above problems occur, it is basically replaced by a new cartridge valve. The new cartridge valve is expensive and the maintenance cost is high. Moreover, it is necessary to re-purchase a new gate valve, and the efficiency is also low.

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