Heat-insulation mica insulation metal protection fireproof cable

Abstract

The invention provides a heat-insulation mica insulation metal protection fireproof cable, and belongs to the technical field of a power cable. The fireproof cable comprises a cable core and a sheath. The fireproof cable is characterized in that the cable core is formed by a plurality of fireproof insulated wire cores; the cable core is externally provided with a metal protection layer, a copper sheath and an interlocking S-shaped crossed armor layer in sequence; the sheath is formed by a low-smoke zero-halogen polyolefin inner sheath and a low-smoke zero-halogen polyethylene outer sheath, and is arranged outside the armor layer; a fireproof isolating layer is arranged between the metal protection layer and the copper sheath; and each fireproof insulated wire core is formed by stranded copper conductors, a mica insulating layer and a ceramic fireproof composite belt. The cable has the advantages of special material, simple structure and advanced technology and the like; and the cable is long in length and continuous, and meanwhile, has excellent electrical performance and mechanical performance. The cable has better flexibility, so that the cable is convenient for construction and installation, and meanwhile, the service life of the cable is prolonged; and the effect of protecting the cable for a long term is realized, and the service life of the cable in the fire site is prolonged.

Description

technical field [0001] The invention relates to a high flame-retardant and fire-resistant cable, in particular to a heat-insulating mica-insulated metal-protected fire-resistant cable, which belongs to the technical field of power cables. Background technique [0002] At present, cables with fire resistance performance on the market are mainly divided into three categories: [0003] One is that the glass silk cloth tape bonded with mica sheet is wound on the outer surface of the copper wire as a fireproof layer. This cable has poor fireproof performance. Poor fire performance; [0004] The second type is a rigid fireproof cable using mineral powder as the insulating layer. The outer layer of the cable is a copper tube, and the hard fireproof cable is laid. The process is complicated, the production is difficult, the production and use costs are high, and the bending performance is poor. Construction is more difficult; [0005] The last type is silicone rubber insulated ca...

AI Technical Summary

Problems solved by technology

[0003] One is that the glass silk cloth tape bonded with mica sheet is wound on the outer surface of the copper wire as a fireproof layer. This cable has poor fireproof performance. Poor fire performance;

[0004] The second type is a rigid fireproof cable using mineral powder as the insulating layer. The outer layer of the cable is a copper tube, and the hard fireproof cable is laid. The process is complicated, the production is difficult, the production and use costs are high, and the bending performance is poor. Construction is more difficult;

[0005] The last one is silicone rubber insulated cable. Silicone rubber has a low fireproof temperature, so the fireproof performance is poor, and poisonous gas will be released in a fire.

Images