Quick helium mass spectrum leakage detecting device for diaphragm inner circle welding joint

Abstract

The invention relates to a quick helium mass spectrum leakage detecting device for a diaphragm inner circle welding joint, solves the problem of difficulty in sealing caused by a small inner cavity formed due to a thin wall and welding of the inner circle welding joint, effectively avoids the problem the whole diaphragm box is scrapped due to leakage of inner circle welding joint, and improves theleak detection efficiency greatly. An inner supporting tool, an upper cover and a lower cover, a sealing ring and the like are used for sealing a narrow space formed after the diaphragm inner circlewelding joint is welded, so that quick and accurate helium mass spectrum leakage detecting is realized; compared with the prior art, the inner supporting tool, the upper cover and the lower cover, thesealing ring and the like are used for sealing the narrow space formed after the diaphragm inner circle welding joint is welded, so that diaphragm inner circle welding joint leakage detecting is realized, and the possibility that the whole diaphragm box is scrapped due to leakage of the weld joint of the diaphragm is reduced.

Description

technical field [0001] The invention relates to a fast helium mass spectrometer leak detection device for the inner circular weld seam of a diaphragm, which belongs to the technical field of aerospace manufacturing. Background technique [0002] The diaphragm box is an elastic element welded by multiple sets of diaphragms, and is an indispensable element in the aerospace field. The production process of the diaphragm box is: two pieces of diaphragm welding inner circle weld seam-diaphragm inner circle weld seam leak detection-welding diaphragm assembly-diaphragm assembly leak detection-welding diaphragm case-diaphragm case total leak detection, in the production process The leak detection of the inner circular weld of the diaphragm box is the most critical link. Since the quality of the weld meets the requirements of QJ1165-87 Class I, it must be ensured that there is no weld and no leak. As a result, the bellows was scrapped due to the leak rate exceeding the standard duri...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a device for quick helium mass spectrometry leak detection of the inner circular weld seam of the diaphragm, which solves the problem of the internal leakage of the diaphragm due to the thin wall and the welding of the inner circular weld seam. The problem that the cavity is small and difficult to seal effectively avoids the problem of scrapping the entire diaphragm box due to leakage of the inner circular weld seam of the diaphragm, and the leakage detection efficiency is greatly improved by using the device for rapid helium mass spectrometry leak detection of the inner circular weld seam of the diaphragm

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