A space extrusion atmospheric pressure accumulation leak detection system and method

Abstract

The invention discloses a space extrusion normal pressure cumulative leak detection system, which comprises a collection container, a space extrusion device, a fan stirring device, a leak detector, a gas sampling and backfilling device, a leak detection calibration device and a product to be tested. The product is equipped with leak detection working fluid, which can leak into the collection container, and the collection container is equipped with a space extrusion device, which can compress and occupy the space in the collection container except the tested product; the fan stirring device is installed on Inside the collection container, it is used to stir the gas in the collection container to make all kinds of gases mix evenly; the gas sampling and backfill device samples the gas in the collection container in real time, and sends part of the sampled gas to the leak detector in real time, and the rest of the gas Transported back to the collection container in real time. Through the invention, the sampling gas is transported and circulated through the gas sampling and backfilling device, which overcomes the deficiency of the gas pumping ability of the leak detector and reduces the pressure loss.

Description

technical field [0001] The invention relates to a leak detection system and method for reducing the existing accumulation space and lowering the minimum detectable leak rate of the leak detection system, in particular to a space extrusion normal pressure accumulation leak detection system and method. Background technique [0002] All kinds of equipment with sealing performance need to be tested for their sealing performance during the development process. In order to detect the tightness of sealing equipment, it is necessary to measure its sealing performance indicators by appropriate methods. One of the methods adopted is helium mass spectrometry atmospheric pressure accumulation leak detection method. The principle of this method is to seal the equipment filled with the leak detection working fluid (helium) in a closed collector, the leaked leak detection working fluid gradually accumulates in the collector, and the partial pressure of the leak detection working fluid con...

AI Technical Summary

Problems solved by technology

Therefore, the increase in the volume of the inner cavity will increase the minimum detectable leak rate of the leak detection system, causing leaks smaller than this minimum detectable leak rate to be unable to be measured; if the minimum detectable leak rate of the leak detection system is reduced by increasing the cumulative time of leak detection Leak rate, the minimum detectable leak rate of the leak detection system is reduced to a fraction of the original value, and the new cumulative leak detection time will be several times the original cumulative time, thus greatly reducing the leak detection efficiency

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