Valve sealing structure, valve body and low-pressure valve using sealing structure

A valve sealing and valve body technology, used in lift valves, control valves, safety valves, etc., can solve the problem of valve opening pressure exceeding the design pressure, and achieve the effect of improving work stability, improving sensitivity, and facilitating maintenance and replacement.

Inactive Publication Date: 2018-06-29
HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a valve sealing structure to solve the problem that the actual opening pressure exceeds the design pressure when the valve is opened for the first time due to rubber adhesion in the existing valve sealing structure

Method used

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  • Valve sealing structure, valve body and low-pressure valve using sealing structure
  • Valve sealing structure, valve body and low-pressure valve using sealing structure

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Experimental program
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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the drawings.

[0027] An embodiment of the valve sealing structure of the present invention figure 1 Shown is a low-pressure one-way valve, which mainly includes a valve body and a valve core 5. The valve body includes a secondary valve body 1, a main valve body 6. One end of the main valve body 6 is provided with a medium inlet 9, and the other end is provided with an external Thread, the auxiliary valve body 1 and the main valve body 6 are connected by a thread and an O-ring 3 is used to achieve sealing. The inner end of the flow passage of the auxiliary valve body is equipped with a spring seat 2 with a circumferential flow hole. The outer peripheral surface of the spring seat 2 is a stepped surface, forming a positioning step for the spring 4 to be sleeved and positioned in the axial direction. The outer circle of the spring seat 2 is The inner hole of the auxiliary valve body 1 has a clearance ...

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Abstract

The invention relates to a valve sealing structure, and provides the valve sealing structure, a valve body and a low-pressure valve using the sealing structure. The valve sealing structure comprises avalve body and a valve element; the valve element is provided with a rubber pad; the valve body is provided with a valve base; the valve base is provided with a sealing fit surface for forming a sealing pair with the rubber pad; an outermost layer of the sealing fit surface is a plastic spraying coating layer; and the plastic spraying coating layer is formed by sprayed Teflon. The outermost layerof the sealing fit surface, forming the sealing pair with the rubber pad, of the valve base is the plastic spraying coating layer; the plastic spraying coating layer is formed by the sprayed Teflon;as Teflon is excellent in non-adhesive performance, the influence on primary opening pressure by attachment of rubber on the sealing fit surface can be prevented; and the valve element adopts an existing valve element without needing special treatment, so that maintenance and replacement are convenient, and the generality is excellent.

Description

Technical field [0001] The invention relates to a valve sealing structure. Background technique [0002] With the development of hydraulic and pneumatic technology, the demand for valve products continues to expand, and the performance and technical requirements of the valve are constantly improving. One-way valves and safety valves are two commonly used valves. They generally include a valve body. The valve body has a valve cavity for the spool to move. The end of the spool near the entrance of the one-way valve is provided with a sealing structure. There is a valve seat corresponding to the valve core, and an adapted sealing structure is provided on the valve seat. In normal use, the valve core relies on the spring to press against the valve seat to block the check valve inlet. When the check valve inlet pressure increases to the set value, the spring is compressed and the valve core moves back to the check valve inlet. Realize one-way communication. [0003] At present, the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/04F16K15/02F16K1/42
CPCF16K1/42F16K15/025F16K17/04
Inventor 张聪超张振炎杨凯幸涛荆兵孟丽娜张耀新王刘朝孔宁宁黄世朋
Owner HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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