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Repair method of insulation defect of power cable thermoplastic materials

A thermoplastic material, insulation defect technology, used in insulation/armored cable repair equipment and other directions, can solve the problems of waste, defect expansion, low reliability, etc., to avoid waste and ensure long-term safe operation.

Active Publication Date: 2015-05-13
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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  • Repair method of insulation defect of power cable thermoplastic materials
  • Repair method of insulation defect of power cable thermoplastic materials
  • Repair method of insulation defect of power cable thermoplastic materials

Examples

Experimental program
Comparison scheme
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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 repair method of the insulation defect of power cable thermoplastic materials. The repair method is characterized by comprising the following steps of step 1, grooving the defect position of an insulation layer; step 2, producing an adhesive tape; step 3, enabling the adhesive tape to wrap the inside of an annular groove; step 4, placing a wire core into a shaping mould, wherein an adhesive tape repair layer wraps the wire core; step 5, performing extrusion forming; step 6, trimming a connecting opening; step 7, achieving the repair after the detection. According to ye repair method of the insulation defect of power cable thermoplastic materials, the insulation defect of the 6 KV and 6 KV below of power cable thermoplastic materials can be safely, reliably and effectively repaired, the same quality of the insulation wire core after treatment and a normal insulation wire core is ensured, the long-term safe operation of the products can be ensured, and the waste is avoided due to the effective repair on the wire core.

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 Applications(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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