Liquid-controlled non-return valve

Abstract

The invention discloses a hydraulic control one way valve and relates to a hydraulic control valve. The hydraulic control one way valve is characterized in that the middle of the hydraulic control one way valve is provided with a main hole; the underside is provided with an oil inlet hole A and an oil outlet hole B; free flow can be formed between the hole A and the hole B; and a hydraulic control port X and an oil drain port Y are also arranged on a valve body. Two sides of the valve body are closed by an end cover and a valve cover; and pressure oil between the end cover and the valve body and between the valve cover and the valve body is kept unleaked outside through a sealing ring and a retaining ring. The inside of the valve body is manufactured with two main flow passage holes by a foundry method in order that the hole A and the hole B are communicated with the main hole respectively. The hydraulic control one way valve has the advantages that the hydraulic control one way valve is optimized and is added with opening pressure in order that the valve has wider application; a right end cover adopts screw thread connection so as to simplify a structure; the structure can increase the oil control cubage and greatly increase oil through amount; and the pre-opening function of the valve can effectively reduce impact vibration and improve the smoothness of motion so as to increase the service life of the valve.

Description

Technical field: [0001] The invention relates to a hydraulic control valve, in particular to a hydraulic control check valve. Background technique: [0002] The hydraulic control check valve is a component widely used in machine tools, engineering machinery, ships and military technical equipment, which usually allows reverse flow after the hydraulic pressure is opened. This type of valve is used for the isolation of the part of the hydraulic circuit, that is, to prevent the load from falling when the pipeline fails and the load drops slowly due to the leakage of the spool. The flow path of the original hydraulic control check valve on the market is processed by machining, which is time-consuming and has a large pressure drop. Due to the direct contact between the poppet valve and the valve body, it is easy to cause the wear and tear of the valve body after working for a long time. At this time, the cost of replacing the valve body is high, and the processing is complicated...

AI Technical Summary

Problems solved by technology

The flow path of the original hydraulic control check valve on the market is machined, which is time-consuming and has a large pressure drop

Due to the direct contact between the cone valve and the valve body, it is easy to cause wear and failure of the valve body after long-term work. At this time, the cost of replacing the valve body is high, and the processing is complicated. At the same time, the hydraulic control check valve also has the problem of small oil control volume and oil flow.

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