Tool and method for detecting high-pressure helium mass spectrum leakage rate of diaphragm valve

Abstract

The invention relates to a diaphragm valve detection tool, and particularly relates to a tool and method for detecting the high-pressure helium mass spectrum leakage rate of a diaphragm valve. The invention aims to solve the problems of complex assembly, poor sealing performance, low reliability and long detection time in the prior art. The detection tool mainly comprises a first filler neck, a second filler neck, an annular leakage detection assembly, end face O-shaped sealing rings, radial O-shaped sealing rings and the like, and is characterized in that a straight joint is communicated withan annular sleeve through a straight pipe section; the first filler neck and the second filler neck are in butt joint through bolts; the annular sleeve is arranged at the butt joint in a sleeving manner; the end face O-shaped sealing rings are respectively arranged between the first filler neck and the diaphragm valve to be tested and between the second filler neck and the diaphragm valve to be tested; and the radial O-shaped sealing rings are arranged between the outer side surfaces of two annular bosses and the inner side surface of the annular sleeve respectively. The tool and the method for detecting the high-pressure helium mass spectrum leakage rate of the diaphragm valve can meet the pressure condition, can prevent products from being damaged, and are simple to assemble, high in sealing performance, short in detection time and high in reliability.

Description

technical field [0001] The invention relates to a diaphragm valve detection tool, in particular to a diaphragm valve high-pressure helium mass spectrometer leak rate detection tool and method. Background technique [0002] The diaphragm valve of the pressurized delivery system on the aerospace vehicle is located upstream of the filter and has the characteristics of "reverse pressure and forward blasting". The diaphragm valve can isolate the steam generated by the propellant and avoid spontaneous combustion when oxygen and combustion steam meet. When the pressurization system is working, the high-pressure gas from the upstream normally opens the diaphragm valve and enters the storage tank for pressurization. Therefore, the tightness of the diaphragm valve is crucial to the entire pressurized delivery system. [0003] In order to verify the sealing performance of the diaphragm valve, a helium mass spectrometry leak test is usually required. During the test, in order to avoid ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex assembly, poor sealing, low reliability and long detection time in the prior art, and provide a tooling and method for leak rate detection of high-pressure helium mass spectrometry of diaphragm valves

Images