Low-temperature leak detection system and leak detection method of valve

Abstract

The invention relates to the technical field of low-temperature leak detection testing of valves, in particular to a low-temperature leak detection system and leak detection method of a valve. The system comprises a gas supply and distribution device, a refrigeration device, a first helium mass spectrometer leak detector, a second helium mass spectrometer leak detector, a plurality of gas inlet pipelines, a plurality of gas outlet pipelines and a vacuum detection platform, wherein the gas supply and distribution device is communicated with the vacuum detection platform through the gas inlet pipelines, the first helium mass spectrometer leak detector is communicated with the vacuum detection platform through the gas outlet pipelines, each pair of gas inlet pipeline and gas outlet pipeline is respectively connected to two ends of the corresponding valve to be detected, and valves are respectively arranged on the first helium mass spectrometer leak detector, the second helium mass spectrometer leak detector, the gas inlet pipelines and the gas outlet pipelines. According to the invention, the refrigeration device is used as a cold source, so that the safety and the reliability of thetest are improved, the labor cost and the test cost are reduced, the temperature of a sample is accurate and controllable, a plurality of valves to be tested can be detected in one test, and the testperiod is short.

Description

technical field [0001] The invention relates to the technical field of valve low-temperature leak detection testing, in particular to a valve low-temperature leak detection system and a leak detection method. Background technique [0002] Cryogenic technology is not only closely related to people's contemporary high-quality life, but also to many cutting-edge scientific researches in the world (such as superconducting technology, aerospace and aviation technology, high-energy physics, controlled thermonuclear fusion, far-infrared detection, precision electromagnetic metrology, biology and life sciences, etc.) are inseparable. With the development of modern science and technology, industrial production, new energy development and aerospace industry, cryogenic valves have been applied in many occasions. Cryogenic valves are widely used, but they are also prone to leakage and have high requirements for manufacturing. Since cryogenic valves mostly work in the ultra-low tempera...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a valve low-temperature leak detection system and leak detection method, which are used to solve the problem of large resource and energy consumption caused by the low-temperature leak detection method of valves in the prior art, complex system structure, low safety and reliability, and long sample replacement time , low efficiency, complex and cumbersome operation, long test cycle, can only realize the test at a specific temperature, can not achieve accurate and controllable temperature, high time cost, labor cost and test cost

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