Intrinsically safe control cables for monitoring and alarm systems

Abstract

The invention discloses an intrinsic safety type control cable for a monitoring alarm system. A cable core comprises a Y-shaped rubber skeleton of a hollow structure, a plurality of small holes are evenly formed in the Y-shaped rubber skeleton, and a drainage wire is arranged in the center of the Y-shaped rubber skeleton. Three gaps of the Y-shaped rubber skeleton are provided with two ground wire cores and one control wire core respectively. Each ground wire core comprises a fan-shaped conductor, a silicon rubber insulation layer is wrapped outside each fan-shaped conductor, the control wire cable comprises three circular conductors and fluoroplastic insulation layers wrapped outside the circular conductors, a mica layer is wrapped outside the three circular conductors which are twisted, and then the three circular conductors are twisted with two tensile ropes. A wrapping layer and a sheath layer are sequentially wrapped outside the cable core. The Y-shaped rubber skeleton of the hollow structure is used, the small holes are evenly formed in the Y-shaped rubber skeleton, so that the drain wire drains the current of any electric leakage wire core out, the using safety of the cable is guaranteed, and the firmness and the stability of the cable are further improved.

Description

technical field [0001] The invention mainly relates to the field of cables, in particular to an intrinsically safe control cable for a monitoring and alarm system. Background technique [0002] The inner conductor of the traditional monitoring and alarm system control cable is a copper conductor, and the sheath is a single-layer PVC sheath. Most of the power cables now require the cables to be safe, low-smoke, halogen-free, environmentally friendly, corrosion-resistant, and insect-resistant. Bite and water blocking characteristics, obviously the traditional control cables can no longer meet the requirements of modern monitoring and alarm systems [0003] Traditional cable sheathing materials are prone to breakage and cracking when encountering high impact external forces, which will affect the normal operation of the cable. Contents of the invention [0004] The object of the present invention is to provide an intrinsically safe control cable for a monitoring and alarm sy...

AI Technical Summary

Problems solved by technology

[0002] The inner conductor of the traditional monitoring and alarm system control cable is a copper conductor, and the sheath is a single-layer PVC sheath. Most of the power cables now require the cables to be safe, low-smoke, halogen-free, environmentally friendly, corrosion-resistant, and insect-resistant. Bite and water blocking characteristics, obviously the traditional control cables can no longer meet the requirements of modern monitoring and alarm systems

[0003] Traditional cable sheathing materials are prone to breakage and cracking when encountering high impact external forces, which will affect the normal operation of the cable.

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