Dual-opening-pressure dual-displacement safety valve

Abstract

The invention discloses a structural design and a realization way of a dual-opening-pressure and dual-displacement safety valve. The safety valve is provided with two different pressure regulation mechanisms capable of providing opening pressures of two different types and corresponding displacements, wherein a primary pressure-displacement regulating mechanism is composed of a valve body, a valve core, a main spring, a spring sleeve and a locking nut and provides the primary opening pressure and displacement of the safety valve; and a secondary pressure-displacement is composed of a valve core, a built-in valve core, a secondary spring, a regulation rod, a spring sleeve and a regulating nut and is used for providing the secondary opening pressure and displacement of the safety valve. The dual-opening-pressure dual-displacement safety valve is applicable to various air pressure systems, is used for releasing gas with pressure higher than the safe pressure of the systems and maintaining the safe operation of the system, and is especially applicable to a condition that the gas supply of the system is limited; when the pressure of the system is slightly higher, small displacement is needed for performing slow pressure relief, so that the gas in the system is prevented from being rapidly lost and being supplied. The safety valve is of an all-metal structure and is also applicable to high temperature systems.

Description

technical field [0001] The invention relates to a double-opening pressure and double-displacement safety valve, which can be used to maintain various normal temperature and high temperature gas (liquid) pressure control, and implement system pressure safety; economical system. Background technique [0002] The safety valve is used to maintain the safety of the gas (hydraulic) system and discharge the excess medium beyond the safe pressure range of the system to the outside of the system. The opening pressure and discharge volume of the safety valve are its important technical indicators, which determine the scope and conditions of its application. Usually, the safety valve in the system only needs to provide a kind of opening pressure, that is, the highest pressure that the weakest structure in the system can bear reliably. If the pressure exceeds this pressure, the safety valve should be opened to quickly release the pressure, so that the pressure in the system can be main...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing safety valve with single opening pressure and single discharge volume cannot meet the requirements of system safety and economy, the present invention provides a valve that can be opened and exhausted slowly under a certain pressure, and when the small displacement cannot restore the system pressure to normal , and a large number of rapid exhaust safety valves

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