Novel one-way valve element structure

Abstract

A new check valve spool structure belongs to the technical field of valves and is composed of a valve stem, a valve plate, a sealing gasket, a pressure plate and a nut. The valve stem is a stepped shaft, and the shaft head of the stepped shaft is processed with external threads. Placed on the shoulder of the stepped shaft, the gasket is placed under the valve plate, the pressure plate is placed under the gasket, the nut is tightened under the pressure plate, and a pin hole through the valve stem is opened on the tightened nut. A latch is arranged in the pin hole. The invention has simple structure and clear working principle. Compared with the traditional valve core structure, it avoids the welding connection between the valve stem and the valve plate, and the fracture of the root of the valve stem is caused by the stress concentration; the setting of the gasket can play a buffering and sealing effect , prolonging the service life of the sealing surface; the use of cylindrical pins can avoid the entanglement of fibrous substances and affect the matching of the sealing surface, further improving the sealing performance.

Description

Technical field [0001] The invention belongs to the technical field of valves, and relates to a novel check valve spool structure, in particular to a check valve spool structure used in a pump body pipeline. Background technique [0002] Valves whose opening and closing parts are opened or closed by the flow and force of the medium to prevent the medium from flowing back are called check valves. According to the structure, it can be divided into three types: lift check valve, swing check valve and butterfly check valve. These one-way valves are often used in factories, heating systems, compressed air, water supply and other devices to prevent backflow or discharge. [0003] The one-way valve core structure generally uses lock nuts, elastic washers, flat washers, and gaskets to realize the sealing of the one-way valve to the valve body, so that the fluid can not be circulated; and when working in high pressure or large flow situations, the valve core structure There are many recip...

AI Technical Summary

Problems solved by technology

[0004] The invention improves on the deficiencies of the spool structure of the traditional one-way valve during use, and proposes a new spool structure of the one-way valve, which decomposes the integrated structure of the traditional valve stem and valve plate, and adds an anti-loosening structure , can solve the problem of valve stem fracture caused by stress concentration, and can prolong the service life of the valve core

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