Mechanical arm for electrolytic machining of corrosion defects in pipe

Abstract

The invention discloses a mechanical arm for electrolytic machining of corrosion defects in a pipe, and the mechanical arm is used for machining the interior of the pipe. The mechanical arm comprises an upper base 14, an upper mechanical arm body 16, a lower mechanical arm body 2, a wrist 5, a mechanical claw 7 and a cathode corrosion mold 9. An upper rotary plate 3 is fixed to the tail end of the lower mechanical arm body 2, a lower rotary plate 4 is fixed to the top end of the wrist 5, and the lower rotary plate 4 and the upper rotary plate 3 are connected and can rotate around the central axis where the lower mechanical arm body 2 is located. An electrolyte channel is formed between the upper surface and the lower surface of the cathode corrosion mold 9, and an electrolyte inlet guide tube 10 communicating with the electrolyte channel is fixed to the upper surface of the cathode corrosion mold 9. The electrolytic machining on the corrosion defects in the pipe is carried out by continuously injecting electrolytes through the electrolyte channel with the cathode corrosion mold 9 as a cathode and a machining pipeline as an anode.

Description

technical field [0001] The invention relates to a mechanical arm for electrolytic processing of internal and external corrosion defects of laboratory pipelines, which mainly solves the problem of difficult internal processing of small-diameter pipe fittings, and can also be used for external corrosion shape processing. The device can be used to process corrosion defects of different shapes on the inner and outer surfaces of small-diameter pipe fittings, and make pipe samples with corrosion defects, so as to conduct buckling tests of pipes with corrosion defects, and explore the influence of internal corrosion defects on the bearing capacity of pipe fittings. Background technique [0002] Corrosion exists widely in metal materials. For steel machinery equipment and oil and gas pipelines exposed to corrosive environments for a long time, corrosion has undoubtedly become the most important factor for structural failure. For marine pipelines, due to the erosion of acidic gas, sm...

AI Technical Summary

Problems solved by technology

[0004] 1. The equipment is complex, and the processing trajectory needs to be controlled by the program;

[0005] 2. The equipment is huge and the loading mechanism is complicated. In order to process the curved groove inside the pipe fitting, an additional motor is needed to assist the movement and rotation of the pipe fitting to process the required groove shape.

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