Device for detecting airtightness of workpiece

Abstract

The invention discloses a device for detecting the airtightness of a workpiece, which belongs to the field of airtightness detection. The device comprises a vacuum box, a helium mass spectrometer leakdetector, a first vacuum pump, an air blowing assembly and a helium filling assembly, the vacuum box comprises an upper box cover and a lower box plate, a vacuum cavity is formed between the upper box cover and the lower box plate, an air inlet of the helium mass spectrometer leak detector is communicated with the vacuum cavity, and an air outlet of the helium mass spectrometer leak detector is communicated with an air inlet of the first vacuum pump; the air blowing assembly comprises an air blowing bottle, a first pressure regulating valve and a first electromagnetic valve, the air blowing bottle is communicated with an air inlet of the first pressure regulating valve, an air outlet of the first pressure regulating valve is communicated with an air inlet of the first electromagnetic valve, and an air outlet of the first electromagnetic valve is communicated with the vacuum cavity. According to the device provided by the invention, high-speed flowing gas is blown in through the gas blowing assembly, and the gas has a driving effect on residual helium in the vacuum cavity, so that the residual helium is rapidly cleaned under the vacuumizing effect of the first vacuum pump.

Description

technical field [0001] The invention belongs to the field of airtightness detection, and more particularly relates to a device for detecting the airtightness of workpieces. Background technique [0002] With the continuous development of processing technology, aluminum alloy die-casting technology provides a wealth of workpieces for all walks of life. [0003] The workpiece needs to be tested for air tightness before leaving the factory to prevent the infiltration of moisture caused by internal pores, which will affect the quality of the workpiece. In the related technology, the detection of the airtightness of the workpiece is realized by the vacuum helium mass spectrometry detection method. Specifically, the workpiece is sealed and placed in the vacuum box first, and then the vacuum box is evacuated by the vacuum system to remove the residues in the vacuum box of the last detection. Helium (leakage of the workpiece itself or leakage of helium when the workpiece was unseal...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a device for detecting the airtightness of workpieces, the purpose of which is to improve the removal efficiency of residual helium in the vacuum box, thereby solving the problem that the removal efficiency of helium is relatively low. low technical issues

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