Leak detection device and use method thereof

A leak detection and hole-reserved technology, applied in measuring devices, using liquid/vacuum degree for liquid tightness measurement, and by detecting the appearance of fluid at the leak point, etc., can solve the problem of inconvenient operation and reduced impact resistance of the weld bead. , Welding bead strength reduction and other problems, to achieve the effect of eliminating adverse effects, large adjustable range and low deviation requirements
CN113252248APending Publication Date: 2021-08-13CNOOC GAS & POWER GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CNOOC GAS & POWER GRP
Publication Date
2021-08-13

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Abstract

The invention relates to a leak detection device and a use method thereof. The leak detection device comprises an upper pressing part which is configured to tightly press an upper preformed hole at the position of the upper preformed hole of equipment to be subjected to leak detection in a sealing mode, the upper pressing part comprises a gas channel, and the gas channel is communicated with the upper preformed hole; the leak detection device further comprises a lower pressing part which is configured to tightly press a lower preformed hole at the position of the lower preformed hole of the equipment to be subjected to leak detection in a sealing manner. The axial compression sealing mode is adopted for connection for leak detection, the requirement for deviation of the hole diameter is low, the adjustable range of the size in the compression axial direction is large, high universality is achieved, operation is convenient during use, adverse effects generated by secondary welding are eliminated, large compression force can be achieved in the axial direction, and sealing can reach the high grade.
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Description

technical field

[0001] The invention relates to the technical field of heat exchangers, in particular to a leak detection device for a PCHE microchannel heat exchanger and an application method thereof. Background technique

[0002] PCHE microchannel heat exchanger (printed circuit board heat exchanger) usually consists of side plates and etched plates. The heat exchanger includes two sets of channels or multiple sets of channels. The most important part is the heat exchange core. Due to the process characteristics of diffusion welding or vacuum brazing, the general products are mostly upper and lower plane structures. After welding, it needs Carry out preliminary airtight leak detection, and enter the subsequent processing procedure after confirming that the product is welded qualified. The structure of the heat exchanger product core after welding is as follows: figure 1 As shown, there are four reserved holes on the upper and lower surfaces to connect the leak detection...

Claims

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