Vacuum box type leakage inspector and inspection method

Abstract

The invention discloses a vacuum box type leakage inspector. The vacuum box type leakage inspector comprises a rack, a vacuum box for containing a workpiece, a box cover moving mechanism for pressing the workpiece, an air inflow mechanism for inflating the workpiece, a plugging mechanism for plugging a water pipe opening of the workpiece, a vacuum pump connected with the vacuum box and a sealing tester connected with the vacuum pump. The air inflow mechanism is connected with the workpiece, and the workpiece is placed on a fixing die of the vacuum box. The vacuum box, the box cover moving mechanism, the air inflow mechanism and the plugging mechanism are arranged on the rack. By the adoption of the structure, the inspection result is high in accuracy and reliability. By optimizing the mechanism design of a vacuum system, the sealing performance of the vacuum system is improved, and the air leakage rate of the system is reduced; high-temperature-resistant sealing elements are selected as ancillary facilities for improving the equipment vacuum degree; the precision sealing tester is selected and used, so that the inspection result is more reliable; by the adoption of the advanced sensing technology and the precision sealing tester, the system can be automatically controlled.

Description

technical field [0001] The invention relates to the field of welding equipment, in particular to a vacuum box-type leak detector and a testing method. Background technique [0002] For the quality detection method of the liner after welding, there are mainly water immersion detection method and gas pressurized leak detection method at home and abroad. The water immersion detection method is completely based on the observation of the operator to judge whether the leakage is within the allowable range, so the reliability is not high, the detection accuracy is low, the labor intensity is high, and the production efficiency is low, so it is not suitable for automatic production. The principle of the gas pressure leak detection method is based on the gas pressure differential method. The pressure sensor directly reflects the test pressure drop caused by the possible leakage, and it can detect the small leakage of the workpiece in a short time according to the inspection paramete...

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Problems solved by technology

[0003] The purpose of the present invention is to disclose a vacuum box-type leak detector and a testing method, which solves the problems of low reliability, low detection accuracy, high labor intensity, and low production efficiency in the prior art for welding quality detection after welding the inner tank.

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