Atmosphere accumulation leak detection system and leak detection method thereof

Abstract

The invention provides an atmosphere accumulation leak detection system which comprises a collector, a leak detector, an atmosphere reference gas source, a probe gas sampling system and a leak rate calibration system. The invention also provides an atmosphere accumulation leak detection method. The leak detection system and the leak detection method are suitable for the total leak rate detection of large-size workpieces of the aerospace industry, ships, vehicles, the nuclear industry, and the like, and meanwhile, the leak detection system and the leak detection method are also suitable for smaller workpieces having sealing requirements of other industries. The detection method belongs to the range of non-contact nondestructive detection, cannot do any damage to detected pieces and completely conforms to national relative standards of nondestructive detection.

Description

technical field [0001] The invention relates to a total leakage rate detection system, in particular to a detection system and a leak detection method for the total leakage rate of large components and complex sealing systems using atmospheric cumulative leak detection technology. Background technique [0002] There are mainly two kinds of total leak detection methods currently used, namely: pressure change leak detection method and vacuum leak detection method. [0003] The pressure change leak detection method can be divided into the pressure rise method and the pressure drop method. It is a method to detect the total leak rate by detecting the pressure change of the gas in the inspected part. It is a relatively easy-to-understand principle. The composition, operation and use are relatively simple, and a total leak rate detection method with relatively low costs. However, the leak detection sensitivity of this method is related to the volume of the object to be tested, th...

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Problems solved by technology

Therefore, the equipment of this leak detection method is complex and the manufacturing, operation and maintenance costs are high; at the same time, the leak detection cycle is long, the use and operation are complicated, and the labor cost is high

For most civilian enterprises, high-cost and low-efficiency leak detection methods are obviously not applicable

[0005] At present, for the vast majority of civilian enterprises, the pressure change leak detection method with simple operation, low cost, but low sensitivity and precision is adopted, and the total leak rate index of the product has been at a relatively low level. Compared with the international industry standards, there is still a big gap, which largely affects the competitiveness of my country's related products in the international market

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