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

Abstract

The invention discloses a halogen-free low-smoke sheathed locking cable for coal mines, which belongs to the technical field of power cables, and aims to provide a coal mine-used halogen-free and low-smoke sheathed locking cable, which improves the performance of multi-strand wire cores. The efficiency of setting the protective layer outside. The cable includes a cable core and a protective layer; each strand of wire core includes multiple groups of core materials and insulating layers, and a second filling layer is filled between the core material and the insulating layer; the outer cylindrical surface of the insulating layer of each strand of wire core is A positioning protrusion is provided, a first groove-shaped structure is provided on the side of the positioning protrusion, a second groove is provided on the lower side of the positioning protrusion, and a raised edge protrusion is provided on the outer end of the second groove; There is a second groove-shaped structure on the outer cylindrical surface of the insulating layer of each strand of wire core, and a raised structure is arranged on the lower side of the second groove-shaped structure. Groove: when two adjacent wire cores are connected, a locking strip is installed in the space formed by the first groove-shaped structure of one wire core and the second groove-shaped structure of the other wire core.

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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