Air tightness detection system and method thereof

Abstract

The invention discloses an air tightness detection system and method. The system comprises a main pipeline, a plurality of booster pumps, a plurality of middle air storage tanks, an inlet air bag, an outlet air storage tank, a multi-stage recovery pipeline and a recovery pump. The plurality of booster pumps are sequentially connected along the direction from the inlet to the outlet of the main pipeline, and the boosting capacities are sequentially increased to boost the detected gas step by step. And at least one middle gas storage tank is connected between every two adjacent booster pumps. The inlet air bag is connected with an inlet of the booster pump located at an inlet of the main pipeline and externally connected with an air source. The outlet gas storage tank is connected with an outlet of the booster pump located at an outlet of the main pipeline. The recovery pipelines are connected in parallel and connected with switch valves, at least two recovery pipelines are connected to the inlet air bag, and at least one recovery pipeline is connected to the middle air storage tank. And a recovery pump is connected in one recovery pipeline connected with the inlet air bag. The gas tightness detection system is small in occupied area, low in manufacturing cost and not prone to damage, and gas recovery is simpler and more convenient.

Description

technical field [0001] The invention relates to the field of sealing technology, in particular to an airtightness detection system and a method thereof. Background technique [0002] Many existing workpieces require high air-tightness requirements in use. In order to ensure their airtightness, their airtightness needs to be tested, and different workpieces have different uses, and the pressures they bear during use are also different. During the performance test, it is necessary to simulate the use pressure to test the air tightness under this pressure, so the pressure requirement for the helium gas that is passed into the test is relatively high. For example, as for the fuel rail of an automobile, because it will bear a relatively high pressure during its work, the high pressure reaches 300bar, and the helium gas that is introduced is pressurized to 300bar when its airtightness is checked. However, in the prior art, a booster pump is used to directly pressurize the helium ...

AI Technical Summary

Problems solved by technology

However, in the prior art, a booster pump is used to directly pressurize the helium to the required high pressure, and the equipment used in this method is bulky and expensive, and in use, the helium is directly raised from normal pressure to high pressure. The booster pump is also vulnerable

And the recovery is also recovered through an air bag. Since high-pressure gas recovery is required, the recovered helium needs to be depressurized, and the recovery is cumbersome.

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