35kv cold shrinking joint

Abstract

The invention discloses a 35kv cold shrinking joint. The cold shrinking joint comprises a connecting pipe, a semi-conductive band, insulation bodies, a cold shrinking intermediate joint pipe, a semi-conductive layer, a constant-force spring, a copper shielding layer, a cable inner sheath, an inner protecting layer, a copper braided wire, an armored layer, an outer protecting layer and a cable outer sheath, the insulation bodies are molded by injection and vulcanization in a factory by employing silicone rubber, parts of the cold shrinking joint are molded by injection and vulcanization by employing materials same as the insulation bodies and then form parts of various cable accessories through diameter expansion and match of plastic supporting objects, the connecting pipe is used for connecting two cable conductors, and each cable conductor, located at two sides of the connecting pipe and the semi-conductive band, is provided with the insulation bodies in an extruding manner. The beneficial effects of the cold shrinking joint are that the size is small, the weight is low, safety and reliability are achieved, the installation is convenient, and the stability between the cable accessories is maintained.

Description

technical field [0001] The invention relates to the field of power cable joints, in particular to a 35kv cold shrinkable joint. Background technique [0002] Cold-shrinkable cable accessories are made of elastomer materials (commonly used are silicone rubber and ethylene-propylene rubber) in the factory for injection vulcanization, and then expanded in diameter and lined with plastic spiral supports to form various cable accessories. When installing on site, put these pre-expansion parts on the treated cable ends or joints, pull out the inner supporting plastic spiral strip (support), and press it on the cable insulation to form a cable accessory. Because it depends on the elastic retraction force at room temperature, instead of being heated and shrunk by fire like heat-shrinkable cable accessories, it is commonly called cold-shrinkable cable accessories. [0003] At present, the connection of the intermediate joint conductors in the market is to use the conductor connectin...

AI Technical Summary

Problems solved by technology

[0003] At present, the connection of the intermediate joint conductors in the market is to use the conductor connecting tube to crimp the two separate cable conductors and connect them together. After the conductors are connected, wrap the semi-conductive tape on the outside of the connecting tube until it is flush with the insulation. Due to the uneven quality of the installers Uneven, when the support bar is pulled, the support bar rubs against the semi-conductive tape to bring the semi-conductive tape into the insulating layer, causing the product to break down during operation. In addition, the viscosity of the semi-conductive tape on the market is uneven. The conductive tape may be scattered during installation and brought into the insulation layer, resulting in product quality accidents

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