Secondary cable carrot joint capable of thermally shrinking directly

Abstract

The invention discloses a secondary cable carrot joint capable of thermally shrinking directly. The secondary cable carrot joint is composed of a cable carrot joint main body and a thermally-shrinking overskirt, wherein the cable carrot joint main body is made of a thermally-shrinking material or soft plastics having certain elasticity and is cylindrical, and a wire inlet hole is formed axially at the center of the cable carrot joint main body; the thermally-shrinking overskirt is made of a thermally-shrinking material and is of a circular skirt shape (i.e., a cone shape); the wire inlet hole is of a shape of an outer contour of the integral cross section of a corresponding cable core, and the size of the outline of the hole is slightly less than the size of the outer contour of the corresponding cable core. The secondary cable carrot joint can be conveniently sheathed on the cutting end part of the cable, then is subjected to thermal shrinkage by a heat gun, and can be well fixed at the cable cutting end part after thermal shrinkage, the operation is simple, and inconsistent or inaesthetic appearance caused by the technological level of operators can be avoided; the cable carrot joint main body and the thermally-shrinking overskirt are of an integral structure, the outline of the diameter of the wire inlet hole can be well matched with the outer outline of the corresponding cable core, and the leakproofness is greatly improved.

Description

technical field [0001] The invention relates to the field of relay protection technology and cables, in particular to a secondary cable radish head which can be directly heat-shrinked. Background technique [0002] With the development of power system, relay protection technology plays an important role in power system. In the relay protection work, it is often necessary to cut the insulation layer at the end of the secondary cable, so as to leave a sufficient length of the secondary cable core for the secondary wiring. After the cable end is cut, the burr on the inner armor of the insulation layer is exposed and hurts the secondary core and the operator. At the same time, it plays a certain sealing role to prevent moisture from entering and corroding the armor of the insulation layer. In addition, it ensures the neatness and beauty of the cable end. At present, the end treatment method usually adopts the winding method to wrap the insulating tape on the outer wall of the s...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. Winding the insulating tape is time-consuming; 2. The quality of its workmanship has a lot to do with the operator's technical level

3. Due to the large gap between the insulating tape and the secondary wire core, there may also be a gap between the insulating tape and the wall of the heat shrinkable tube due to the process, and its sealing is relatively poor, and moisture may enter for a long time The insulating layer corrodes the armor and affects the overall performance of the cable

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