Combined valve

Abstract

The invention belongs to the technical field of hydraulic elements, relates to a combined valve device, in particular to a combined valve integrating the functions of a hydraulic control one-way valve, a one-way throttle valve and a relief valve. The combined valve comprises a valve body, wherein a first check valve plug, a second check valve plug, a throttle core rod, a hydraulic control valve plug and an overflow component and other control parts are arranged in the valve body, so that actual requirement can be achieved by using combination of the control parts. The combined valve has smart structure, is compact and reasonable, has no inside connection thereby avoiding leakage point, has simple circuit connection, can be detached and maintained quickly and conveniently, improves production efficiency, has high rigidity and strength, can bear 70MPa hyperpressure, is safe and reliable, has wide application range, integrates the functions of the hydraulic control one-way valve, the one-way throttle valve and the relief valve, can effectively save space, and saves cost.

Description

technical field [0001] The invention belongs to the technical field of hydraulic components, and relates to a combined valve device, in particular to a combined valve integrating three functions of a hydraulic control check valve, a check throttle valve and an overflow valve. Background technique [0002] In the prior art, in order to achieve pressure maintenance after jacking, synchronous descent, and pressure relief during overload, the main jacking oil circuit of the hydraulic positioner must have a hydraulic control check valve, a one-way valve in the oil circuit design. If the throttle valve and overflow valve are used in combination with three single-function valves, it will take up a lot of space, the assembly is difficult, the line connection is complicated, and the connection joints are prone to leakage, which will cause great damage to maintenance and repair. Inconvenience; and although a relatively small valve can save some space, it is expensive and the cost is t...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, in order to achieve pressure maintenance after jacking, synchronous descent, and pressure relief during overload, the main jacking oil circuit of the hydraulic positioner must have a hydraulic control check valve, a one-way valve in the oil circuit design. If the throttle valve and overflow valve are used in combination with three single-function valves, it will take up a lot of space, the assembly is difficult, the line connection is complicated, and the connection joints are prone to leakage, which will cause great damage to maintenance and repair. Inconvenience; while a relatively small valve can save some space, but it is expensive and the cost is too high

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