Compression bar destabilizing trigger type emptying pressure relief valve applied to micro-pressure working condition

Abstract

The invention discloses a compression bar destabilizing trigger type emptying pressure relief valve applied to the micro-pressure working condition. Main components of the compression bar destabilizing trigger type emptying pressure relief valve comprises a valve body, a valve clack, a slender bar, a top plate, a nut, a screw stud, a sleeve, a linear bearing, a locknut and the like. The slender bar is an element of the trigger action, and the compression bar destabilizing principle is applied, so that the slender bar triggers the compression bar destabilizing trigger type emptying pressure relief valve to relieve. Under the normal working condition, the load on the slender bar is less than the critical load of the slender bar, the slender bar remains stable, and the valve clack can not move along the sleeve under the action of axial force at the same time, so that the valve clack and the valve body are kept to be in a sealed state. Under the abnormal working state, the load on the slender bar is greater than or equal to the critical load of the slender bar, the slender bar is destabilized momentarily and is bent, and the supporting effect on the valve clack is lost; the valve clack is pushed by the medium pressure to move along the sleeve through the linear bearing, and the valve clack is disengaged from the valve body to make a medium to be discharged to the outside, so that the purpose of pressure relief is achieved.

Description

technical field [0001] The present invention relates to a pressure relief valve, more specifically to an empty pressure relief valve that can be automatically opened when the pressure exceeds a set value. Background technique [0002] In order to protect oil storage tanks and other equipment from overpressure damage, it is necessary to set up a pressure relief valve that automatically opens when the pressure in the storage tank exceeds the limit. The permissible overpressure of petroleum storage tanks is usually very low, which places high demands on this type of pressure relief valve. [0003] The invention is a pressure bar instability trigger type venting pressure relief valve suitable for low-pressure working conditions, and its design is based on the principles of pressure bar stability and pressure bar instability. The medium pressure acts on the valve disc to generate a thrust load, which is loaded on the slender rod through the valve stem. When the force generated ...

AI Technical Summary

Problems solved by technology

[0004] After investigation, there is currently no pressure rod instability trigger type exhaust and pressure relief valve suitable for low pressure conditions

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