A stainless steel sealing detection method based on helium mass spectrometer leak detector

Abstract

The invention discloses a stainless steel sealing detection method based on a helium mass spectrometer leak detector. The detection steps are divided into three parts, namely preliminary screening, static detection and dynamic detection. , which can improve the efficiency and ensure the authenticity and accuracy of the detection. The significance of static detection of the instrument to be tested is to determine the stability and tightness of the instrument in a stable environment, and to provide a reference for subsequent dynamic detection. On the basis of static detection The temperature change and vibration change are added to the above, and the working conditions encountered by the actual simulation instrument in the actual use process are simulated, so that the obtained detection data is more authentic and effective, further improving the quality of the instrument itself, and providing convenience and durability for the follow-up. ensure.

Description

technical field [0001] The invention relates to a sealing detection method, in particular to a stainless steel instrument sealing detection method based on a helium mass spectrometer leak detector. Background technique [0002] The basic working principle of the gas sealing performance detector is the same as that of the balance, one end is the reference reference (standard product), and the other end is the tested part (tested product). However, its measurement sequence is just the opposite of that of the balance. Both sides of the reference object and the workpiece to be measured are filled with air of the same pressure at the same time, so that the two ends of the "balance" - the differential pressure sensor are balanced. If there is a leak in the tested workpiece, even if it is a small leak, the "balance" will be out of balance, thus detecting the differential pressure at both ends due to the leak. The gas sealing performance detector will measure the specific leakage o...

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Problems solved by technology

[0003] However, the detection method in the prior art usually detects the tightness of the pressure gauge in a static environment. On the one hand, this method is to ensure the accuracy of the detection, but on the other hand, according to the actual application of the relevant instrument, Temperature and vibration are the normal conditions for the instrument to work, so it is necessary to increase the dynamic test of the instrument in the test to ensure that the instrument can also ensure the airtightness in the normal working environment or even in the short-term extreme working environment