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Novel low smoke zero halogen fire resistant armoured cable

A low-smoke flame-retardant, armored cable technology, applied in the field of wire and cable, can solve the problems of poor tear resistance, shortened service life, low elongation at break, etc., to achieve wide application prospects, good social benefits and economic effect of benefit

Inactive Publication Date: 2007-05-16
JIANGSU HONGTU HIGH TECHNOLOGY STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the double-layer steel tape armor in the cable is directly extruded with a halogen-free low-smoke flame-retardant polyolefin outer sheath; because the material of the halogen-free low-smoke flame-retardant polyolefin outer sheath has poor tear resistance, low tensile strength, and fracture The elongation is low, and the cable forms stress concentration at the gap between the steel strips during bending and use, causing the outer sheath at the gap between the steel strips to crack easily due to the stress concentration, resulting in damage to the cable, shortened service life, and reduced reliability

Method used

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  • Novel low smoke zero halogen fire resistant armoured cable

Examples

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Effect test

Embodiment 1

[0027] Halogen-free low-smoke flame-retardant XLPE insulated polyolefin sheathed steel tape armored power cable, WDZ-JYY 23 3×50 0.6 / 1kV:

[0028] 50mm 2 Copper conductor 1, cross-linked polyethylene insulation 2, three-core insulated core 9 twisted cable 11, wrapped with a layer of non-woven fabric 3, polyolefin inner sheath 5, double-layer interval wrapped steel tape armor 6, wrapped Two layers of halogen-free low-smoke glass ribbon 7, extruded halogen-free low-smoke flame-retardant polyolefin outer sheath 8.

Embodiment 2

[0030] Halogen-free low-smoke flame-retardant steel tape armored computer cable, WDZ-DJYYP 2-23 20×2×0.5450 / 750V:

[0031] 0.5mm 2 Copper conductor 1, polyethylene insulation 2, 2 insulated wire cores 9 twisted into a wire group 10, 20 wire groups 10 twisted cables 11, polyester wrapping tape 3, copper tape wrapping shielding 4, polyolefin inner sheath 5 , double-layer spaced steel tape armor 6, wrapped with two layers of low-smoke halogen-free glass ribbon 7 and a layer of non-woven fabric 7, extruded low-smoke halogen-free flame-retardant polyolefin outer sheath 8.

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Abstract

The related halogenless low-smoke fire retardation armoured cable comprises: between the dual-layer open lapping tape armoring and the halogenless low-smoke fire retarding polyolefin oversheath, arranging a buffer layer as lapping or extruding structure to eliminate stress concentration and prevent the oversheath cracking led by the armoring. This invention has well physical and chemical performances, and can improve cable reliability for long service time.

Description

Technical field: [0001] The invention relates to the technical field of cables, more precisely, the invention relates to a halogen-free low-smoke flame-retardant armored cable. It belongs to the technical field of electric wires and cables. Background technique [0002] At present, the double-layer steel tape armor in the cable is directly extruded with a halogen-free low-smoke flame-retardant polyolefin outer sheath; because the material of the halogen-free low-smoke flame-retardant polyolefin outer sheath has poor tear resistance, low tensile strength, and fracture The elongation is low, and the cable forms stress concentration at the gap between the steel strips when it is bent and used, causing the outer sheath at the gap between the steel strips to crack easily due to the stress concentration, resulting in cable damage, shortened service life, and reduced reliability. Invention content: [0003] The object of the present invention is to provide a double-layer steel t...

Claims

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Application Information

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IPC IPC(8): H01B7/17H01B7/295
Inventor 毛文沛李佳东
Owner JIANGSU HONGTU HIGH TECHNOLOGY STOCK CO LTD
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