Structure for repairing arc plate type large caliber PE pipeline under pressure and repair method of structure

Abstract

The invention relates to a structure for repairing an arc plate type large caliber PE pipeline under pressure and a repair method of the structure. The structure comprises a leakage stopping plate and a PE arc plate. The leakage stopping plate blocks the damaged position of the PE pipeline through a high elasticity seal ring and a fastening screw, the inner arc face of the PE arc plate is matched with the outer surface of the PE pipeline, a groove in which the leakage stopping plate is embedded is formed in the middle of the inner arc face, an electromagnetic insulation heating wire is inlaid in the inner arc face on the periphery of groove, and a temperature measuring probe is buried in the inner arc face. The PED arc plate is fused with the PE pipeline into a whole through electromagnetic hot melting, and the leakage stopping plate is arranged in space formed by the groove in the inner surface of the PE arc plate and the PE pipeline. According to the structure for repairing the arc plate type large caliber PE pipeline under pressure and the repair method of the structure, mechanical leakage stopping and electromagnetic hot melting are organically combined, a leakage medium is blocked through mechanical leakage stopping, initial sealing is formed, conditions are created for fusion of the PE arc plate and the original PE pipeline through electromagnetic hot melting, and finally the PE arc plate is fused with the PE pipeline into a whole to achieve repair under pressure of the damaged position of the PE pipeline.

Description

technical field [0001] The invention relates to the damage repair of PE pipes in running state, in particular to an arc-plate 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. Tr...

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Problems solved by technology

[0004] The invention aims to solve the problem of repairing damaged large-diameter PE pipes under pressure, and provides a method that can prevent penetrating cracks with a length of less than 3M and holes smaller than the diameter of the pipe that appear on the PE pipe body when the PE pipe is in normal operation. Arc-plate type large-diameter PE pipe under pressure repair structure and its repair method

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