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A Repairing Method for Insulation Defects of Power Cable Thermoplastic Material

A thermoplastic material and insulation defect technology, which is applied in the direction of insulation/armored cable repair equipment, can solve the problems of defect expansion, waste, and low reliability, and achieve the effect of ensuring long-term safe operation and avoiding waste

Active Publication Date: 2017-12-22
INNER MONGOLIA RENDA SPECIAL CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reliability of this processing method is not high. If the processing method is wrong, it may also cause the expansion of defects.
Another treatment method is to cut the wire core at the place where the defect occurs, which is not advisable for products that require fixed lengths, and will cause a lot of waste

Method used

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  • A Repairing Method for Insulation Defects of Power Cable Thermoplastic Material
  • A Repairing Method for Insulation Defects of Power Cable Thermoplastic Material
  • A Repairing Method for Insulation Defects of Power Cable Thermoplastic Material

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Embodiment 1

[0025] Embodiment 1: A method for repairing insulation defects of thermoplastic materials of power cables, characterized in that it comprises the following steps: (1) slotting at the defect of the insulation layer; (2) preparing rubber strips; (3) wrapping glue in the annular groove (4) Put the wire core wrapped with rubber strip repair layer into the shaping mold; (5) extrusion molding; (6) repair the interface; (7) complete the repair after detection; among them,

[0026] (1) Grooving at the defect of the insulating layer: such as figure 2 As shown in Fig. 1, an annular groove with an isosceles triangular cross-section is opened at the defect of the insulating layer of the wire core with a circular planer. The advantage of equal sides is to ensure the quality of the subsequent process and prevent the formation of stress concentration here. . The angle between the waist of the isosceles triangle and the center line of the core is 15 degrees. If the degree is too large, the ...

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Abstract

The invention discloses a method for repairing insulation defects of a thermoplastic material of a power cable, which is characterized in that it comprises the following steps: (1) opening a groove at the defect of the insulation layer; (2) preparing a rubber strip; (3) wrapping the rubber in the annular groove (4) Put the wire core covered with the rubber strip repair layer into the shaping mold; (5) Extrude; (6) Flatten the interface; (7) Complete the repair after inspection. The advantage of the present invention is that the method of the present invention can safely, reliably and effectively repair the insulation defect of the thermoplastic material of the 6KV and below power cable, ensure that the quality of the treated insulated core is consistent with that of the normal insulated core, and can ensure the quality of the product. Long-term safe operation; and effectively repair the core to avoid unnecessary waste.

Description

Technical field: [0001] The invention relates to a cable repair method, in particular to a repair method suitable for insulation defects of thermoplastic materials of 6KV and below power cables. Background technique: [0002] Power cables are cables used to transmit and distribute electric energy. They are often used in urban underground power grids, power stations, and power input or output lines of industrial and mining enterprises. They are the most widely used types of cables in society. [0003] Insulation performance is the most important performance index of power cable products, which directly affects the quality of the entire cable product and whether it can be operated safely. [0004] When cable conductors are insulated and extruded, due to the extrusion temperature control, the cleanliness of the machine chamber, machine head and mold surface, and even the cleanliness of the insulating material itself, the extrusion performance of the insulation will be affected,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/16
Inventor 刘钢王怀山李义东李永在
Owner INNER MONGOLIA RENDA SPECIAL CABLE
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