Mineral Halogen Free Low Smoke Flame Retardant Cable

Abstract

The invention discloses a mineral-based halogen-free low-smoke flame-retardant cable, which comprises a plurality of wire cores, a flame-retardant layer outside the wire cores, a filling layer between the wire cores and the flame-retardant layer, and a fire-retardant layer outside the flame-retardant layer. The outer sheath, the wire core includes a cylindrical base column, a plurality of separators uniformly distributed along the circumferential direction of the cylindrical base column, copper wires located between two adjacent separators, and filling the gap formed by the separators and copper wires The inner insulation layer; the separator extends axially along the cylindrical base column; elastic sheets are fixed on the adjacent surfaces of two adjacent separators, and the two elastic sheets form an opening for the copper wire to enter, and the opening is smaller than the diameter of the copper wire ; The end of the elastic sheet away from the separator is bent along the radial direction of the cylindrical base column to the central axis of the cylindrical base column to form a guide part; the abutment block is fixed on the separator, and the abutment blocks are arranged at intervals along the axial direction of the cylindrical base column ; After the copper wire is placed between two adjacent separators, the end of the guide part abuts against the outer side of the copper wire, and the inner side of the copper wire is in contact with the abutting block tightly.

Description

technical field [0001] The invention relates to the field of cables, in particular to mineral halogen-free low-smoke flame-retardant cables. Background technique [0002] Cable is a general term for items such as optical cables and cables. There are many uses of cables, mainly used for multiple functions such as control installation, connection equipment, power transmission, etc. It is a common and indispensable thing in daily life. Since the cables are live, installation requires special care. [0003] Existing cables, such as the irrigation cable disclosed by the notification number CN103606404A, include a central cable core and an outer sheath layer. The cable core and the polyurethane elastomer outer sheath layer are extruded from the inside to the outside with a polyvinyl chloride inner lining layer and an aluminum-plastic composite tape longitudinally wrapped shielding layer. The insulated core includes the conductor and the outer surface of the conductor Insulation...

AI Technical Summary

Problems solved by technology

[0004] The cable core is composed of several insulated wire cores twisted and combined, and polypropylene mesh tear fibers are arranged between adjacent insulated wire cores, and between adjacent insulated wire cores and the PVC inner lining layer. Filling, this method needs to bundle several insulated wire cores first, and the operation is more troublesome

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