A gamma-ray detection method for butt joints of small-diameter pipes

Abstract

The invention introduces a gamma ray detection method for butt joints of small-diameter pipes. The special tooling for detection includes a fixing mechanism for fixing the adjustment mechanism, an adjustment mechanism for adjusting the position of the gamma ray source, and a tightening device for fixing the gamma ray source. fixed mechanism; fix the tooling on the pipeline to be tested, and adjust the adjustment mechanism so that the height of the gamma ray source that can be installed is at a suitable position; adjust to make the horizontal position of the gamma ray source suitable; Place the film that needs to be exposed in the corresponding position; move the gamma ray source to the working position; the gamma ray source performs radiation exposure on the film, and understand the weld quality of the butt joint through the exposure results of the film. The method of the invention greatly improves the detection efficiency, shortens the detection cycle, reduces the number of auxiliary personnel, saves labor costs, ensures the detection quality, reduces detection radiation, and improves personal safety protection.

Description

technical field [0001] The invention relates to a detection technology for pipe butt joints, in particular to a gamma ray detection method for small diameter pipe butt joints. Background technique [0002] In recent years, the state's investment in environmental protection has gradually increased, and the upgrading of the industrial quality of the petroleum and chemical industries has also accelerated; the management level, personnel quality, and mechanization level of the construction team have also been greatly improved. It is not a legend that 10,000 tons of ethylene can be built within one to two years. As a testing unit specializing in petroleum and chemical construction and installation, it is still inseparable from the traditional testing technology—ray testing (х, gamma rays). As far as X-ray inspection is concerned, the equipment is bulky, easily damaged, and the maintenance cost is high. High-altitude fixed transillumination depends on the appropriateness of the...

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is to provide a gamma ray detection method for butt joints of small-diameter pipes, which can better and effectively solve the difficulty in selecting the focal length when gamma-rays are used to detect small-diameter pipe welds. ;Sensitivity is too low; Defect location is not accurate; The control of the length of the welding seam and the avoidance of missed inspections, etc.

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