Slender-rod pressure release valve

Abstract

The invention relates to a slender-rod pressure release valve. A valve body is a cylinder; an upper valve cover is hermetically arranged on the top of the valve body; a bottom cover is hermetically arranged on the bottom of the valve body; the upper valve cover, the valve body and the bottom cover form a sealed cylindrical cavity; a valve element is assembled in the cylindrical cavity and can move up and down; the lower end of a valve rod is connected with the valve element, and the upper end of the valve rod passes through a central through hole of the upper valve cover; the top of the valve rod is connected with the lower end of a slender rod vertically arranged; the upper end of the slender rod is connected with a support rack; the support rack is fixedly connected with the upper valve cover; the bottom cover is provided with a medium high-pressure input passage; inner port of the medium high-pressure input passage is opposite to the bottom of the valve element; the valve body is provided with a medium low-pressure output passage; an inner port of the medium low-pressure output passage is positioned in an inner wall of the valve body; when the valve element is kept static, the inner port of the medium low-pressure output passage is plugged by the valve element; when the valve element moves upward, the inner port of the medium low-pressure output passage is opened. The slender-rod pressure release valve is wide in application range and high in adjustment precision.

Description

technical field [0001] The invention relates to a pressure relief valve, in particular to a slender rod pressure relief valve, which belongs to the technical field of valve equipment. Background technique [0002] With the development of industry and the progress of science and technology, people pay more and more attention to safety issues and have higher and higher requirements. In various occasions, more and more attention is paid to the use of pressure relief valves (safety valves). [0003] At present, the pressure relief valves that are often used mainly include bursting disc type, spring type, bursting needle type pressure relief butterfly valve and pilot plunger valve, etc. They all have their own advantages and disadvantages: 1. The bursting disc type cannot be reused, and the quality is not good. Hershey is easy to fatigue and cause failure, and it is troublesome to replace; 2. The spring load changes greatly with the rise of the valve disc, and its performance is...

AI Technical Summary

Problems solved by technology

[0003] At present, the pressure relief valves that are often used mainly include bursting disc type, spring type, bursting needle type pressure relief butterfly valve and pilot plunger valve, etc. They all have their own advantages and disadvantages: 1. The bursting disc type cannot be reused, and the quality is not good. Hershey is easy to fatigue and cause failure, and it is troublesome to replace; 2. The spring load changes greatly with the rise of the valve disc, and its performance is greatly affected by high temperature; The pressure trigger mechanism is too complicated, the precision is not high, and the cost is too high; 4. The pilot-operated plunger valve is quite complicated, and it is directly connected with the main valve, which has limitations in use and is not suitable for high temperature and low pressure occasions

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