Method for removing welding slag and overlap on inner wall of steel pipeline

Abstract

The invention discloses a method for removing welding slag and overlap on the inner wall of a steel pipeline. The method specifically comprises the following steps: 1, the inner diameter size of the pipeline is detected; 2, according to the inner diameter size of the pipeline, a power sealing support assembly, a filing and grinding elastic assembly and a tooth-shaped arc surface grinding knife are manufactured and an overlap removing instrument is assembled; 3, according to the inner diameter size of the pipeline, an overlap-removing launching device is manufactured and mounted; 4, the overlap removing instrument is launched into the pipeline with the overlap to be removed through the overlap-removing launching device; 5, when the overlap removing instrument runs at a pipe section outside a welding line in the pipeline, the tooth-shaped arc surface grinding knife runs close to the inner wall of the pipe; and 6, when the overlap removing instrument runs near the welding line of the inner wall of the pipeline, the tooth-shaped arc surface grinding knife files and grinds the overlap to completely grind the overlap flat. The method for removing the welding slag and overlap on the inner wall of the steel pipeline can remove the welding slag and overlap on the inner wall of the pipeline safely, completely and rapidly and is high in work efficiency.

Description

technical field [0001] The invention relates to a technology for removing welding slag and welding nodules on the inner wall of a steel pipeline, in particular to a method for removing welding slag and welding nodules on the inner wall of a steel pipeline. Background technique [0002] The use of steel pipes to transport fluids is the safest, most convenient and cheapest method of transportation. According to the type, concentration, temperature, flow rate, pressure, etc. of the medium transported by metal pipes, it will have different degrees of damage to the inner wall of the steel pipe. Corrosion, wear and scaling have greatly limited the application of steel pipes. Reasonable selection of anti-corrosion materials and construction technology in the pipeline is an effective method to prolong the service life of the pipeline, reduce investment and prolong the production cycle. As high temperature, high pressure and strong corrosive media are more and more commonly used for...

AI Technical Summary

Problems solved by technology

[0003] At present, the removal of welding slag and welding burrs on the inner wall of steel pipes is usually to open a skylight near the weld seam with welding burrs, cut the pipe with gas cutting, use a grinder to smooth the welding slag and welding burrs, and then restore the skylight Welding, which not only prolongs the construction period, but also adds many weak points to the pipeline matrix

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