Safety valve for multi-way valve

Abstract

The invention relates to the technical field of engineering elements, in particular to a safety valve for a multi-way valve. The safety valve comprises a safety valve assembly installed on a front cover of the multi-way valve, wherein the safety valve assembly comprises a valve body, a valve element is installed in the valve body, a sealing part installation groove is formed in the outer surface of the valve element, the installation groove is composed of a high-pressure area groove part for accommodating a first O-shaped ring and a low-pressure area groove part for accommodating a first servo gasket, and the high-pressure area groove part is provided with a splayed bottom. According to the safety valve for the multi-way valve, an original sealing part installation groove in the outer surface of the valve element is improved by being divided into the high-pressure area groove part for accommodating the first O-shaped ring and the low-pressure area groove part for accommodating the first servo gasket, the high-pressure area groove part is provided with the splayed bottom, in this way, abrasive wear and distorsion damage of a sealing part can be reduced, the service life of the sealing part can be prolonged, and replacement frequency can be reduced.

Description

technical field [0001] The invention relates to the technical field of engineering components, in particular to a safety valve for a multi-way valve. Background technique [0002] The safety valve on the multi-way valve in the hydraulic lifting system is most prone to failure, resulting in internal leakage of the multi-way valve, and the phenomenon that light loads can be lifted but heavy loads cannot be lifted. The safety valve is on the front cover of the multi-way valve, close to the oil return chamber. Through the overflow of the valve port, the safety valve keeps the pressure of the controlled hydraulic system constant, realizes the function of stabilizing, regulating or limiting the pressure, and prevents the system from overloading. The relief valve must meet the conditions of large pressure regulation range, small pressure regulation deviation, sensitive action, large flow capacity and low noise. [0003] When the lifting system is loaded, the spool of the four-pos...

AI Technical Summary

Problems solved by technology

When the O-ring on the safety valve spool is damaged or broken, the high-pressure oil will flow from the damaged gap of the O-ring on the safety valve spool to the return chamber of the multi-way valve at high speed, resulting in the oil entering the hydraulic cylinder The pressure is insufficient, the flow rate is reduced, the system is hot and noisy, the multi-way valve leaks internally, and the light load can be lifted, but the heavy load cannot be lifted.

Images