Halogen-free low-smoke protective layer locking type cable for coal mine

Abstract

The invention discloses a halogen-free low-smoke protective layer locking type cable for a coal mine, belongs to the technical field of power cables, and is intended to provide the halogen-free low-smoke protective layer locking type cable for the coal mine to improve the efficiency of arranging a protective layer out of multiple strands of cable cores. The cable comprises cable cores and a protective layer; each strand of the cable core includes multiple groups of core materials, and an insulating layer; a second filling layer is arranged between the core materials and the insulating layer; positioning bumps are arranged on an outer cylindrical surface of the insulating layer of the each strand of the cable core; a first grooved structure is arranged at a side of each of the positioning bumps; a second groove is formed on a lower edge of each of the positioning bumps; a raised edge bump is arranged at an outer end of each of the second grooves; second grooved structures are arranged on the outer cylindrical surface of the insulating layer of the each strand of the cable core; a bump structure is arranged at a lower edge of each of the second grooved structures; a clamping groove matched with each of the edge bumps is arranged at one end of each of the bump structures; and when adjacent two strands of the cable cores are connected, a space formed by the first grooved structureof one strand of the cable core and the second grooved structure of the other strand of the cable core is provided with a locking strip inside.

Description

technical field [0001] The invention belongs to the technical field of power cables, and in particular relates to a halogen-free low-smoke sheath lock type cable for coal mines. Background technique [0002] With the rapid development of our country's national economy and the continuous improvement of people's living standards, the requirements for accelerating the construction of urban special-purpose power grids are becoming increasingly urgent. However, the application occasions of communication cables are complex, and the performance requirements for cables are extremely strict. Cables must have good mechanical and physical properties and be able to withstand various mechanical stresses, and the electrical properties will not deteriorate in harsh environments, so as to ensure long-term reliable work. However, existing cables generally have disadvantages such as poor shielding effect, low transmission speed, and poor anti-interference ability, especially for cables used ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of halogen-free and low-smoke sheathed lock type cable for coal mines, in order to solve the technical problem that the wire core moves arbitrarily and causes the installation of the protective layer to be very troublesome when the protective layer is set outside the multi-strand wire core. Efficiency of protective layer outside multi-strand wire core

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