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Medium-voltage fire-resistant power cable

A power cable and fire-resistant technology, which is applied in the direction of power cables, power cables with shielding layers/conductive layers, insulated cables, etc., can solve problems such as single structure, inability to control fires in time, and inability to solve high combustion temperatures, so as to prevent fire from expanding Effect

Active Publication Date: 2020-05-22
上海业燊科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing power cable has a single structure, which can only simply isolate the external high temperature or external combustion, and cannot solve the combustion caused by the internal short circuit and the internal high temperature, and cannot timely control the fire caused by the short circuit

Method used

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  • Medium-voltage fire-resistant power cable

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Effect test

Embodiment 1

[0022] like figure 1 As shown, a medium-voltage fire-resistant power cable includes a cable core, a cooling layer 7, a fire-resistant composite layer 9, a metal armor layer 10 and a sheath 11, and the cooling layer 7 is covered with several cable cores. The cooling layer 7 is coated with a refractory composite layer 9, a metal armor layer 10 and a sheath 11 sequentially from the inside to the outside. The cable core includes a plurality of wire core bundles, and the wire core bundle includes a conductor 1, a conductor shielding layer 2, The insulating layer 3, the insulating shielding layer 4 and the metal shielding layer 5; the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are extruded on the conductor 1 at one time by three-layer co-extrusion, and the insulating shielding layer Layer 4 is covered with a metal shielding layer 5, and the conductor shielding layer 2 is extruded on the conductor 1 by a semiconducting tape and the semico...

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Abstract

The invention relates to a medium-voltage fire-resistant power cable. The cable comprises cable cores, a cooling layer, a fireproof composite layer, a metal armor layer and a sheath. The plurality ofcable cores are coated in the cooling layer; and the cooling layer is sequentially coated with a fireproof composite layer, a metal armor layer and a sheath from inside to outside. Each cable core comprises a plurality of wire core bundles. A plurality of dry powder pipes are arranged in gaps among the plurality of wire core bundles; the dry powder pipes are filled with a fire extinguishing agent,each wire core bundle comprises a conductor, and a conductor shielding layer, an insulating layer, an insulating shielding layer and a metal shielding layer which are coated outside the conductor, and the conductor shielding layer, the insulating layer and the insulating shielding layer are extruded on the conductor in a three-layer co-extrusion manner in a one-step molding manner. The medium-voltage fire-resistant power cable disclosed by the invention has certain fire resistance and cooling performance, can ensure the transportation of electric power and signals when a fire occurs, or has the effects of extinguishing fire and retarding flame when a short circuit fire occurs.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a medium-voltage fire-resistant power cable. Background technique [0002] With the sustained and rapid development of my country's economy, modern office buildings, hotels, restaurants, railway stations and other important public places are becoming more and more luxuriously decorated, and more and more combustible materials are used; major and medium cities in the country have successively built subway lines, such as These important public places require that once a fire occurs, the wires can normally and continuously transmit power, transmit various control signals and alarm signals to provide valuable services for people's escape, automatic alarm, start of fire-fighting facilities, rescue and use of emergency equipment. The time, and the fire-resistant wire is to ensure that the line is normally powered on for a certain period of time when a fire occurs, and transmit various con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/42H01B7/295H01B7/29A62C3/16
CPCH01B9/027H01B9/024H01B7/423H01B7/295H01B7/292A62C3/16Y02A30/14
Inventor 代荣记张拓朱冬荣蔡志祥欧阳从军班龙成
Owner 上海业燊科技有限公司
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