Defect detection method of high-pressure gas-filled connecting pipe

Abstract

The invention discloses a high-pressure gas-filled connection pipe defect detection method, which relates to test on fluid sealing performance of a structural part. According to the high-pressure gas-filled connection pipe defect detection method, a first standard channel and a second standard channel are arranged at two ends of the connection pipeline respectively, and a standard block capable of sliding in the first standard channel and the second standard channel is arranged. In the case of detection, the standard block is put in a first to-be-detected channel, the first standard channel, the connection pipe and the second standard channel are in sequential butt joint to form a to-be-detected channel; a high-pressure gas is filled in the to-be-detected channel, and the pressure inside the to-be-detected channel is kept to be 15 MPa; gas filling at a constant flow is carried out from the left end of the to-be-detected channel, external gas exhaust is carried out at the same at the right end of the to-be-detected channel, the standard block slides in the to-be-detected channel to the right end of the to-be-detected channel, a time-displacement curve of the standard block is recorded until the standard block operates to the other end of the to-be-detected channel, and then, gas filling is stopped; and through the time-displacement curve, a connection pipe defect can be directly judged.

Description

technical field [0001] The invention relates to the testing of fluid tightness of structural parts, in particular to a defect detection method of a high-pressure inflatable connecting pipe. Background technique [0002] In the filling process of high-pressure gas, in order to realize long-distance gas transportation, it is inevitable to connect multiple pipes to extend the delivery pipe. The pipe connection is connected by a special connecting pipe. The connecting pipe is made of metal casting to make it have high pressure bearing performance; the middle part of the connecting pipe is a cylindrical hollow channel, and the two ends of the connecting pipe are connecting parts. It is fixed to the pipe; when the connecting pipe connects two pipes, the two ends of the pipe are inserted into the hollow channel of the connecting pipe, and the connecting part fixes the pipe to connect the two pipes together. In order to prevent the tightness of the connection between the connecting...

AI Technical Summary

Problems solved by technology

[0005] The detection of the size defect of the connecting pipe is usually to eliminate the defect by controlling the size of the connecting pipe; however, due to the large surface area of ​​the inner wall of the connecting pipe, it is impossible to measure the dimensions of the hollow passage of the connecting pipe. The detection of pipe size is usually judged by the standard block. Since the standard block is matched with the connecting pipe, it cannot be observed intuitively, so it is usually judged by experience and cannot be accurately judged.

[0006] At present, the above two inspections are carried out separately. Due to the casting defects or size defects of the connecting pipes, the connecting pipes will be scrapped, so repeated inspections often occur, making the inspection efficiency low.

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