Corrosion welding repair device and method for petroleum or natural gas conveying steel pipeline

Abstract

The invention discloses a petroleum or natural gas conveying steel pipeline corrosion welding repair device and method, the repair device comprises an anchor rod, a steel wire rope and a clamp, the two ends of the steel wire rope are connected to the steel wire rope, and the clamp comprises a pressing plate, an elastic telescopic rod and two sets of clamping plate mechanisms; the pressing plate is used for pressing the repairing plate outside a to-be-repaired area of a steel pipe line, the elastic telescopic rod is perpendicularly fixed to the middle of the outer surface of the pressing plate, a through hole is formed in the end, away from the pressing plate, of the elastic telescopic rod, the steel wire rope penetrates through the through hole in a sliding mode, and the two clamping plate mechanisms are located on the two sides of the elastic telescopic rod respectively and used for clamping the two ends of the repairing plate in the circumferential direction. According to the repairing method, the repairing device is adopted, the repairing plate is fixed to the steel pipe line through the anchor rod, the steel wire rope and the clamp, the steel wire rope is fixed to the ground through the anchor rod, and therefore an anchoring point does not need to be found on the steel pipe line, and fixing of the steel wire rope on the ground is easy to operate. And fixation is firm.

Description

technical field [0001] The invention relates to a pipe welding device, in particular to a corrosion welding repair device and method for oil or natural gas transmission steel pipelines. Background technique [0002] Chinese Patent Publication No. CN101579773A discloses an online repair welding process for oil pipelines. It uses different welding methods and welding processes for corrosion reinforcement under various pipeline materials and operating conditions; when repairing the repair plate, the material and wall thickness of the repair plate are the same as those of the welded pipeline, and low-hydrogen electrodes are used. The temperature of the inter-weld metal should be lower than 150°C; repair the pitting corrosion pit directly, and use a low-hydrogen electrode; if the repair welding is not completed at one time, and the welding needs to be continued, wait until the weld metal cools below 150°C. And remove the welding slag before proceeding. [0003] The patch will a...

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Problems solved by technology

[0003] The mending plate will also be added with a cylindrical panel that is compatible with the steel pipe line. At present, when the common mending plate is welded, the mending plate is fixed on the pipeline by rigging. It is not easy to set the anchor point when fixing the patch board, and it is difficult to fix the patch board

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