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Fireproof cable used for firefighting

A cable and fire-fighting technology, which is applied in the field of fire-resistant cables for fire-fighting, can solve the problems of easy deformation and aging of cables, achieve excellent heat insulation performance and electrical insulation ability, good mechanical toughness, and improve the effect of tensile strength

Inactive Publication Date: 2018-06-19
安徽清启系统集成有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fire-resistant cable for fire-fighting to solve the problem of easy deformation and aging of the cable under high temperature in the above-mentioned background technology

Method used

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  • Fireproof cable used for firefighting

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Embodiment 1

[0021] Please refer to the attached figure 1 , which discloses an embodiment 1 of the present invention, including a cable core 1, a high temperature resistant insulating layer 2, an aluminum metal sheath 3, an epoxy / benzoxazine resin-based fire-resistant inner sheath 4 and a low-smoke halogen-free polyolefin outer sheath 5.

[0022] High temperature resistant insulating layer 2 is made of 45 parts of mica powder, 20 parts of glass fiber, 15 parts of polytetrafluoroethylene modified phenolic compression molding powder and 5 parts of Mg(OH) 2 made.

[0023] Three copper wires are twisted with each other and wrapped in ceramic silicone rubber 7 to form an insulated conductor 6. The ceramic silicone rubber solidifies into a hard ceramic body under high temperature conditions, shields the internal conductor, and keeps the cable at 950°C-1000°C Under high temperature, it can maintain a working time of more than 90 minutes, so that the power transmission at the fire scene is smoot...

Embodiment 2

[0025] Please refer to the attached figure 1 , which discloses the embodiment 2 of the present invention, the present embodiment is similar to the embodiment 1, the difference is that the high temperature resistant insulating layer (2) is made of 55 parts of mica powder, 30 parts of glass fiber, 25 parts of polytetrafluoroethylene modified phenolic pressed plastic powder and 10 parts Mg(OH) 2 Made with a thickness of 3mm, the insulated conductor is made by twisting eight copper wires.

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Abstract

The invention discloses a fireproof cable used for firefighting. The fireproof cable is characterized by comprising a cable core, a high-temperature-resistant insulating layer, an aluminum metal sleeve, an epoxy / benzoxazine resin-based fireproof internal sheath and a low-smoke halogen-free polyolefin external sheath. The cable core is formed by four strands of insulating conductors which are mutually and externally tangent. The high-temperature-resistant insulating layer is formed by mica powder, glass fiber, teflon modified phenolic molding powder and Mg(OH)2 and wraps the cable core. The aluminum metal sleeve is formed by aluminum wires which are spirally and closely wound on the external side of the high-temperature-resistant insulating layer. The epoxy / benzoxazine resin-based fireproofinternal sheath wraps the aluminum metal sleeve. The low-smoke halogen-free polyolefin external sheath wraps the epoxy / benzoxazine resin-based fireproof internal sheath. The cable is ensured to normally operate under high temperature, and the shrinkage is close to zero without the aging phenomenon so as to have great mechanical performance and electrical insulation performance.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a fireproof cable for fire protection. Background technique [0002] At present, the widely used fireproof cables mainly include UL series flame-retardant cables and flame-retardant low-smoke halogen-free cables. Although the fire-resistant cable has good fire-resistant performance, so that it can operate normally in the fire environment, it is easy to shrink and deform under high temperature conditions, causing aging and cracking of the cable, and the service life is limited, which increases the cost of fire protection. [0003] The patent application number is CN201510009364.0, which discloses a kind of isolated magnesium oxide insulated fireproof cable, which uses ceramic fireproof coating layer and inorganic mineral fireproof isolation layer to improve the fireproof performance of the cable, and wraps the inner core with a synthetic magnesium oxide powder insulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/17H01B7/18H01B7/28H01B7/282H01B7/29
CPCY02A30/14H01B7/292H01B7/17H01B7/1875H01B7/28H01B7/2825H01B7/29
Inventor 章涛林
Owner 安徽清启系统集成有限公司
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