Polypropylene cable and insulating layer repairing method and application thereof

Abstract

The invention belongs to the technical field of polypropylene cables, and particularly relates to a polypropylene cable and an insulating layer repairing method and application thereof. The invention provides a polypropylene cable and an insulating layer repairing method and application thereof, and the repairing method comprises the steps: wrapping a pencil stub slope insulating layer with a polypropylene insulating tape, then sequentially wrapping the polypropylene insulating tape with a rubber soft film, a metal foil and a polyimide film from inside to outside, and finally heating the polypropylene insulating tape to melt the polypropylene insulating tape, the polypropylene insulating tape can provide lasting radial pressure, the metal foil can uniformly transfer heat, and the polyimide film has relatively high tensile strength and relatively low load elongation, so that the polypropylene insulating tape and the to-be-repaired position of the polypropylene cable insulating layer are fused and combined, the repair of the polypropylene cable insulating layer is realized, and the service life of the polypropylene cable insulating layer is prolonged. The electrical performance of the polypropylene cable is guaranteed, and the technical problem that in the prior art, a polypropylene cable insulation layer repairing technology is lacked is solved.

Description

A polypropylene cable and its insulating layer repair method and application technical field The application belongs to polypropylene cable technical field, relate in particular to a kind of polypropylene cable and insulation layer repair method thereof and application. Background technique The excellent electrical properties of cross-linked polyethylene (XLPE) make cross-linked polyethylene insulating material as a long-distance transmission frame. The insulating layer of empty lines and the insulating layer of urban underground cables are widely used. But the polyethylene after the cross-linking is a kind of thermosetting material, cannot rely on self-degradation, can only adopt incineration during recycling And the way of crushing and landfilling, and some harmful cross-linking by-products will be produced in the process of cross-linking reaction, environmental protection pressure is high, dissatisfaction meet the requirements of green grid. Unlike cross-linked...

AI Technical Summary

Problems solved by technology

[0003] However, cross-linked polyethylene is a thermosetting material that cannot be degraded by itself. It can only be recycled by incineration and crushed to landfill, and some harmful cross-linked by-products will be produced during the cross-linking reaction. Environmental pressure Large, does not meet the requirements of the green grid

Different from cross-linked polyethylene, the production process of polypropylene is simple, without cross-linking and degassing process, low energy consumption, small plant area, and can be recycled after reaching the service life, and polypropylene has excellent electrical properties, melting temperature High temperature resistance and good water resistance. Therefore, polypropylene insulation mater

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