Novel fire-resistant cable

A fire-resistant cable, a new type of technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of rising production costs, increased outer diameter, and increased raw material consumption, so as to improve production efficiency, increase temperature resistance, and reduce production costs. Effect

Inactive Publication Date: 2014-05-28
SHANGHAI CARDIFF CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing process of producing fire-resistant cables by overlapping and wrapping fire-resistant mica tape outside the conductor generally increases the outer diameter of the insulating layer and subsequent layers, thereby increasing the amount of raw materials for the insulating layer and subsequent layers, and increasing production costs.

Method used

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Examples

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Effect test

Embodiment 1

[0067] A ceramic fire-resistant cable with a rated voltage of 0.6 / 1 kV and below. The structure of the ceramic fire-resistant cable is basically the same as that of the non-fire-resistant product of this type. The cable wrapping tape is replaced with a 2-layer ceramic fire-resistant and fire-resistant composite tape. . The ceramic refractory cable includes five insulated wire cores, and each insulated wire core includes a copper conductor 11 and a cross-linked polyethylene insulating layer 12 covering the copper conductor 11 . The 5 insulated wire cores are wrapped with 2 layers of ceramicized fireproof and refractory composite tapes 14, and there are polypropylene mesh belt filling layers 13 between the insulated wire cores and between the insulated wire cores and the porcelainized fireproof and refractory composite tapes 14. Porcelain fireproof and refractory composite belt 14 is extruded with PVC outer sheath 15, see figure 1 .

Embodiment 2

[0069] A new type of fire-resistant cable, including four insulated wire cores, each insulated wire core includes a copper conductor 21 and a polyvinyl chloride insulating layer 22 covering the copper conductor 21. The 4 insulated wire cores are wrapped with 2 layers of ceramicized fireproof and refractory composite tapes 24, and there are polypropylene mesh belt filling layers 23 between the insulated wire cores and between the insulated wire cores and the porcelainized fireproof and refractory composite tapes 24. Porcelain fire-proof and refractory composite tape 24 is extruded with PVC inner sheath 25, and the outer side of PVC inner sheath 25 is provided with galvanized steel tape armor layer 26, and the outer side of armor layer 26 is extruded with PVC outer sheath 27 ,See figure 2 .

Embodiment 3

[0071] A new type of fire-resistant cable, including 7 insulated wire cores, each insulated wire core includes a copper conductor 31 and a cross-linked polyethylene insulating layer 32 covering the copper conductor 31. The 7 insulated wire cores are wrapped with 2 layers of ceramicized fireproof and refractory composite tape 33, and a copper wire braided shielding layer 34 is arranged on the outer side of the porcelainized fireproof and refractory composite tape 33, and the outer side of the shielding layer 34 is wrapped with a halogen-free flame-retardant low-smoke polyolefin outer layer. Sheath 35, see image 3 .

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Abstract

The invention discloses a novel fire-resistant cable comprising a plurality of insulation wire cores. Two layers of porcelain fireproof fire-resistant composite belts are wrapped outside the plurality of insulation wire cores. A shielding layer is arranged outside the porcelain fireproof fire-resistant composite belts. An outer sheath is arranged outside the shielding layer. The porcelain fireproof fire-resistant composite belts are utilized to generate the novel fire-resistant cable, so that the temperature-resistant level of the fire-resistant cable is improved, the normal power on time is prolonged; and meanwhile, the production efficiency of the fire-resistant cable is improved, and the production cost is substantially reduced.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a novel ceramic refractory cable. Background technique [0002] Existing fire-resistant cables use refractory mica tape wrapped around the outer conductor. Even if the insulation layer of the cable is completely destroyed in the flame of 950-1000°C, the refractory mica tape wrapped around the outer conductor can ensure normal power-on for more than 90 minutes, and the leakage current Not greater than 2A. [0003] However, the existing process of producing fire-resistant cables by overlapping and wrapping fire-resistant mica tape outside the conductor generally increases the outer diameter of the insulating layer and subsequent layers, thereby increasing the amount of raw materials for the insulating layer and subsequent layers, and increasing production costs. Contents of the invention [0004] The present invention provides a novel fire-resistant cable in order to solve the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B7/17H01B7/29H01B7/295
Inventor 代秋霞张亮张伟
Owner SHANGHAI CARDIFF CABLE
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