High-pressure stop valve used for hydrogen system

Abstract

The invention discloses a high-pressure stop valve used for a hydrogen system. The stop valve comprises a shell, a valve rod and a valve seat. The valve rod is mounted in the shell through a plug capand a bearing. A combined sealing component is arranged between the valve rod and the shell. The lower end of the valve rod is connected with an ejection ball which is in threaded fit with the shell.The lower end of the ejection ball is connected with a valve element. The valve element abuts against the valve seat to form a sealing pair. The high-pressure stop valve used for the hydrogen system has the beneficial effects that axial movement of the ejection ball drives the valve element to move axially in the valve opening direction, the valve element is made to move away from or close to thevalve seat so as to achieve the purpose of opening or closing the valve, no relative rotation occurs between the valve element and the valve seat, accordingly, no abrasion is generated in the sealingpair, the reliability of the sealing pair is effectively guaranteed after multiple times of opening and closing of the valve, and the service life is greatly prolonged. In addition, abrasion seldom occurs between the valve element and the valve seat, almost no excessive substances is produced, and the probability of pollution of the excessive substances on a galvanic pile is lowered.

Description

technical field [0001] The invention relates to a shut-off valve, in particular to a high-pressure shut-off valve for a hydrogen system. Background technique [0002] Fuel cell is a new type of power generation device that can convert the chemical energy of fuel into electrical energy. Among them, hydrogen fuel cell has the advantages of high power generation efficiency and low environmental pollution, and has been paid more and more attention by people. Hydrogen is the most abundant and clean energy in the world, and it is the best fuel for fuel cells. As a new energy in the automobile industry, it has been valued and vigorously developed by various countries because of its rich resources, high efficiency and environmental protection. [0003] In various hydrogen systems, stop valves are inevitably used. In the prior art, stop valves are generally composed of a valve body, a valve core, a valve seat and an actuating mechanism. Among them, the valve core and the valve seat ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-pressure shut-off valve for a hydrogen system to solve the problems of the existing shut-off valve in the above-mentioned background technology, such as large volume, weight, and high cost, excess waste generated by sealing surface wear, and sealing performance.

Images