Plate-type non-return valve

Abstract

A plate check valve, relating to the field of hydraulic control valve, comprises a valve body, wherein a main hole, opened in the center of the valve body, is in the form of step blind hole, screws are arranged on the shoulder surface on the right end of the valve body; a bottom plate arranged on the bottom part of the valve body, wherein an oil inlet P1 and an oil outlet P2 are opened on the bottom surface of the valve body and communicated with the main hole of the valve body, and a sealing ring is arranged at the interface of the oil inlet P1 and the oil outlet P2 and the bottom surface of the valve body; a cone valve arranged in the main hole, wherein the end part of the cone valve is arranged to be cone-shaped, the cone body is arranged to be a cylinder, the step part of the end part and the cone body is arranged to be chamfer; an end cover arranged on the right end of the valve body, wherein the outside of the end cover is provided with screws which are fit with the screws on the shoulder surface on the right end of the valve body, the interface of the end cover and the valve body is sealed through the sealing ring and a retaining ring; a spring arranged on the cylindrical surface on the right end of the cone valve, wherein one end of the spring is contacted with the step part of the end and the valve body, the other end is sleeved on the shoulder surface of the end cover.

Description

Technical field: [0001] The invention relates to the field of hydraulic control valves, in particular to a plate-type one-way valve for controlling one-way flow of an oil circuit. Background technique: [0002] At present, the plate check valve is a check valve connected by a bottom plate, which only allows the oil to flow in one direction and cut off in the reverse direction. For the structure of the traditional plate check valve, please refer to the attached figure 2 and attached image 3 . In the traditional structure, the distance between the oil sealing port of the cone valve and the oil outlet P2 is small, which makes the opening position of the cone valve not large enough. The service life of the spring is shortened due to the close pressure and size. Due to the position limitation, only one spring opening pressure can be designed, which cannot meet various opening pressure requirements. The spring seat and the end cover adopt a split structure, and the spring seat...

AI Technical Summary

Problems solved by technology

In the traditional structure, the distance between the oil sealing port of the cone valve and the oil outlet P2 is small, which makes the opening position of the cone valve not large enough. The service life of the spring is shortened due to the close pressure and size. Due to the position limitation, only one spring opening pressure can be designed, which cannot meet various opening pressure requirements. The spring seat and the end cover adopt a split structure, and the spring seat needs to be installed The oil groove prevents oil trapping. The gap between the spring seat and the cone valve is small, which makes the processing and assembly cumbersome. The limit of the cone valve is limited by the left end surface of the spring seat, so that the impact and collision during work are concentrated on The shoulder of the cone valve affects the service life of the cone valve

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