Vacuum leakage inspection device based on differential pressure method

Abstract

The invention discloses a vacuum leakage testing device based on a differential pressure method. The device comprises a vacuum cover, a pluggable air pipe, a vacuum pump and a portable lithium battery pack; the vacuum cover is connected with the vacuum pump through the pluggable air pipe; and the vacuum pump is connected with the portable lithium battery pack. The vacuum cover comprises a panel; the panel of the vacuum cover is provided with an air pipe quick connector; a lighting supporting frame is fixed on the panel of the vacuum cover, a quick plug-in vacuum meter is fixed on the panel of the vacuum cover, an adjusting valve is fixed on the panel of the vacuum cover, an ergonomic handle is fixed on the panel of the vacuum cover, an adjustable nut is fixed on the panel of the vacuum cover, and a coated sealing strip is fixed at the bottom of the panel of the vacuum cover. The device has the advantages of light weight, convenience in transfer, and improved working efficiency; the device is waterproof and sealed, the reliability and maintenance performance of thedevice are improved, and the service cycle of the device reaches 1000 times; and a wrapping type sealing structure can rapidly wrap a welding seam, and it is guaranteed that the vacuum degree does not decrease within 5 s.

Description

technical field [0001] The invention belongs to a flat plate welding seam inspection device of a pressurized water reactor nuclear power plant, and in particular relates to a vacuum leakage inspection device based on a differential pressure method. Background technique [0002] Vacuum cover leak detection technology is a kind of bubble leak detection method. The leak detection equipment is mainly composed of vacuum cover, vacuum pump, vacuum gauge, and air release valve. The purpose of implementing leak detection is to detect the leak position of pressure-bearing parts that cannot be directly pressurized. The basic method and principle is to paint the foaming agent on the local area of ​​the inspected part, and place a vacuum cover on it, and evacuate the vacuum cover to form a pressure difference between the inside and outside of the local area. If there is a penetration in the inspected part If there is a permanent defect, the foaming agent at the defect position will for...

AI Technical Summary

Problems solved by technology

In the pre-commissioning stage, the requirements for electricity consumption are strict, requiring the use of high-standard power supplies, and most of the inspection objects are the welds on the surface of the pool, with a large drop and a large area. The inspectors need to climb and work on scaffolding, and there are difficulties in equipment transfer. , the problem of inconvenient power supply layout, in coastal areas, especially the high temperature weather in July, August and September, has aggravated the work difficulty of inspectors

The working environment in the pre-commissioning stage basically lacks ambient lighting, which is not conducive to the development of on-site co-walking, which requires higher requirements for leak detection equipment based on negative pressure difference

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