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Medium voltage fire resisting cable

A fire-resistant cable, medium-voltage technology, applied to power cables with shielding/conducting layers, etc., can solve problems such as insufficient cable protection, and achieve the effect of improving shielding performance, good thermal insulation performance, and good encrustation performance.

Inactive Publication Date: 2012-12-12
JIANGSUSNGSHANG CABLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its ceramic-like solid refractory insulation layer does not provide enough protection for the inner cable in an oxygen combustion environment

Method used

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  • Medium voltage fire resisting cable
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  • Medium voltage fire resisting cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 with image 3 As shown, the medium-voltage fire-resistant cable has a conductor 1 in the middle, and the conductor 1 is a copper conductor. The conductor shielding layer 2, the insulating layer 3, and the insulating shielding layer 4 are sequentially extruded in a three-layer extruding manner outside the conductor 1. The insulating shielding layer 4 is provided with a metal shielding layer 5, and the metal shielding layer 5 is preferably a copper tape shielding layer. The conductor 1 , the conductor shielding layer 2 , the insulating layer 3 , the insulating shielding layer 4 and the metal shielding layer 5 form an insulated wire core 6 . The insulating core 6 is provided with a heat insulating layer 9 , a combined fire-resistant layer, a low-smoke, halogen-free flame-retardant tape 12 and an outer sheath 13 in sequence. The heat insulation layer 9 is preferably an alkali-free glass fiber braided tape. The combined refractory layer consists of an in...

Embodiment 2

[0034] Such as figure 2 with image 3 As shown, the medium-voltage fire-resistant cable has three conductors 1 in the middle, and the conductor 1 is a copper conductor. The conductor shielding layer 2, the insulating layer 3, and the insulating shielding layer 4 are sequentially extruded in a three-layer extruding manner outside the conductor 1. The insulating shielding layer 4 is provided with a metal shielding layer 5, and the metal shielding layer 5 is preferably a copper tape shielding layer. The conductor 1 , the conductor shielding layer 2 , the insulating layer 3 , the insulating shielding layer 4 and the metal shielding layer 5 form an insulated wire core 6 . The three insulated cores 6 and the filler 7 constitute the cable core 8, and the filler 7 is preferably an alkali-free glass fiber material. The cable core 8 is provided with a heat insulation layer 9 , a composite fire-resistant layer, a low-smoke halogen-free flame-retardant tape 12 and an outer sheath 13 i...

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Abstract

The invention discloses a medium voltage fire resisting cable, belongs to the technical field of power cables and aims to supply the medium voltage fire resisting cable which is not prone to damage and good in fire resistance in an aerobic and high temperature combustion environment. The technical scheme includes that the cable comprises a conductor (1), a conductor shielding layer (2), an insulating layer (3) and an insulating shielding layer (4) are sequentially formed on the conductor in an extrusion wrapping mode, a metal shielding layer (5), a thermal protective layer (9), a fire resisting layer and an outer sheath (13) are sequentially arranged on the exterior of the insulating shielding layer (4), and the fire resisting layer is formed by combining an inner fire resisting layer (10) made of a ceramic silicon rubber and an outer fire resisting layer (11) made of an incrustation type polyolefin. According to the technical scheme, the technical problems that similar ceramic solid fire resisting thermal protective layer is prone to damage in the aerobic and high temperature combustion environment and the protection for internal cables is insufficient are solved, and the fire resistance of the medium voltage fire resisting cable is improved.

Description

technical field [0001] The invention relates to a power cable, in particular to a medium-voltage fire-resistant cable, which belongs to the technical field of power cables. Background technique [0002] With the development of China's economy, the voltage of the power supply system in the city is gradually increasing. If 0.6 / 1kV low-voltage power distribution is used for high-rise and super-large high-rise buildings, the cable consumption and workload will be huge. In order to solve the actual power supply problem, buildings such as high-rise buildings and super-large high-rise buildings have begun to use medium-voltage power supply (6kV ~ 35kV). The main performance required by the medium-voltage power supply cable: in the case of combustion, it can guarantee normal power supply for a period of time. [0003] Chinese patent CN101236801A discloses a fire-resistant cable, which is coated with a 0.05mm-1.00mm fire-resistant insulation layer made of silicon compound and an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02
Inventor 袁常俊李斌刘威
Owner JIANGSUSNGSHANG CABLE GROUP