Flanged large-diameter pe pipeline repairing structure under pressure and its repairing method

Abstract

The invention relates to a flange-type large-diameter PE pipe pressure repair structure and a repair method thereof, including a PE flange with a neck split in the middle, a looper flange and a neck flange with a metal material split in the middle, and a PE flange The inner arc surface and split surface are inlaid with electromagnetic insulated heating wires and pre-embedded temperature measuring probes. Two PE flanges are located on both sides of the damaged part of the PE pipe, and are fused with the PE pipe through electromagnetic melting; the loop flange Set on the neck of PE flange and welded together through its split surface, the neck flange is set on the PE pipe and welded together through its split surface, neck flange, loop flange, The PE flanges are sealed and connected by bolts; the PE pipe between the two necked flanges is covered with a metal pipe, and the two ends of the metal pipe are welded to the neck of the necked flange to form a sealed cavity around the damaged part of the PE pipe. The invention can repair the damage of any form and any part under pressure under the running state of the PE pipeline.

Description

technical field [0001] The invention relates to the damage repair of PE pipes in running state, in particular to a flange-type large-diameter PE pipe pressure repair structure and a repair method thereof. Background technique [0002] PE material pipes, especially large-diameter pipes, are being widely used in recent years because of their excellent corrosion resistance, high elasticity and plasticity, easy long-distance laying and long service life. Due to reasons such as manufacturing, installation and force majeure, the pipeline will be damaged or even broken, resulting in waste of materials, production stoppage, environmental pollution and even major accidents. [0003] PE material is a polymer inert material, which is difficult to bond with other materials, and has great elasticity but low stiffness. As the operating pressure of the pipeline changes, the geometric dimensions such as the diameter, length, and thickness of the pipeline will change dynamically. Traditiona...

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problem of pressure repair of large-diameter PE pipe damage, and provides a flange-type large-diameter PE pipe that can repair any form and any part of the PE pipe under pressure when the PE pipe is running. Repairing structure under pressure and its repairing method

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