Repairing method of large-section low-voltage single-core flexible cable

Abstract

The invention relates to a repairing method of a large-section low-voltage single-core flexible cable and belongs to the electric construction technical field. According to the method, an adhesive ofwhich the chemical compositions are identical with the chemical compositions of the insulation layer of a cable is attached to the damaged portion of the cable when the insulation layer does not falloff yet; when the insulation layer falls off, a gap is trimmed, and is filled with a rubber sheet of which the thickness and material are identical with the thickness and material of the insulation layer, the gap is adhered with an adhesive of which the chemical compositions are identical with the chemical compositions of the insulation layer; a high-voltage waterproof insulation rubber self-adhesive tape which can withstand 1.5 times of the rated voltage of the cable to be repaired is adopted to wrap the damaged portion in a semi-overlapped manner; an electrical insulation adhesive tape can withstand 1.5 times of the rated voltage of the cable to be repaired is adopted to wrap the damaged portion within the range of the high-voltage waterproof insulation rubber self-adhesive tape in a semi-overlapped manner; and a cross-linked polyethylene hard jacket with a thickness more than 2mm is adopted to wrap a damaged wrapping range, and is tightened by nylon cable ties. The method can realize fast construction speed; the materials adopted by the method are light; quality can be ensured, and safety is within a controllable range; and the method is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of electric construction, and relates to a repair method of a low-voltage single-core cable, in particular to a repair method of a large cross-section low-voltage single-core flexible cable. Background technique [0002] Cables are widely used in electrical installations in all walks of life. During the construction and operation of cables, affected by the environment, cables are prone to insulation damage to varying degrees. There are two methods for traditional cable repair. One is to use insulating tape for simple winding. This solution can only play a temporary repair role. Long-term operation requires regular replacement of insulating tape at the winding place; the other is to use vulcanization heat repair method , this method requires special repair tools, hot patchers, molds, etc., and it needs to be used under the condition of 220V power supply, and this method is applicable in the environment where ...

AI Technical Summary

Problems solved by technology

There are two methods for traditional cable repair. One is to use insulating tape for simple winding. This solution can only play a temporary repair role. Long-term operation requires regular replacement of insulating tape at the winding place; the other is to use vulcanization heat repair method , this method requires special repair tools, hot patchers, molds, etc., and it needs to be used under the condition of 220V power supply, and this method is applicable in the environment where the cable is horizontal or the slope is not large, and the site is wide. Difficult to use in harsh environments, such as cables inside the towers of megawatt-scale wind turbines

[0003] There is a working platform every 20m in the tower of the megawatt-level wind power generation unit. The platform has limited load-bearing capacity, and the cables are laid along the wall of the cylinder. Using traditional restoration methods, construction safety and quality cannot be guaranteed

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