Pipe helium mass spectrometer leak detection device and method

Abstract

The invention discloses a helium mass spectrometer leak detection device for pipe materials, which comprises a vacuum joint (1), a mandrel (2), a lower pressure piece (3), a sealing gasket (5), a support piece (6) and a helium mass spectrometer detector. The mandrel (2) is a hollow tubular structure, and a vacuum joint (1) is provided on the top of the mandrel (2), and the pressing member (3), the gasket (5) and the supporting member (6) are set Set on the mandrel (2), the support (6) is detachably fixed on the mandrel (2), and the pressing member (3) can move axially along the mandrel (2), so that the gasket ( 5) It can radially expand along the mandrel (2) under the extrusion action of the pressing member (3) and the supporting member (6). The pipe material helium mass spectrometer leak detection device of the present invention has many advantages such as easy manufacture, simple operation, high reliability, high leak detection efficiency, low cost, and reusability.

Description

technical field [0001] The invention relates to a leak detection device, in particular to a helium mass spectrometer leak detection device for a heat transfer tube of a nuclear island heat exchanger, belonging to the detection field. Background technique [0002] In the field of nuclear power equipment manufacturing, the heat transfer tube of the heat exchanger is the barrier between the radiative medium on the primary side and the secondary side. Once leakage occurs, it will cause great pollution to the secondary side. Therefore, the sealing requirements for the heat transfer tubes of the heat exchanger are very high. [0003] At present, the water pressure / air pressure test is generally used to test the tightness of the heat transfer tube, but its efficiency is low, the cost is high, and the processing is complicated. [0004] Helium mass spectrometry leak detection is an economical and convenient detection method. If it can be applied to the detection of heat transfer tu...

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Problems solved by technology

[0003] At present, the water pressure / air pressure test is generally used to test the tightness of the heat transfer tube, but its efficiency is low, the cost is high, and the processing is complicated

[0004] Helium mass spectrometry leak detection is an economical and convenient detection method. If it can be applied to the detection of heat transfer tubes in heat exchangers, the detection cost will be greatly reduced. However, it is limited by the functionality of the helium mass spectrometry leak detection device, especially the It is difficult to realize the sealing and vacuuming of the end, and it is not yet possible to apply helium mass spectrometry leak detection to the detection of heat transfer tubes of heat exchangers

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