Environment-friendly type underground power cable

A power cable and environmentally friendly technology, applied in the field of environmentally friendly subway power cables, can solve the problems of a large amount of smoke, troublesome fire and rescue work, and the cable will inevitably not burn, and achieve low smoke density and small emission. Effect

Inactive Publication Date: 2005-11-02
TEBIAN ELECTRIC APP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the fire affects the cables, it is difficult to prevent the cables from burning. At the same time, the cables will produce a lot of smoke after burning, which will bring more trouble to firefighting and rescue work.

Method used

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  • Environment-friendly type underground power cable
  • Environment-friendly type underground power cable
  • Environment-friendly type underground power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: as figure 2 As shown, in the present embodiment, the present invention has conductor 1, inner semiconductive shielding layer 2, insulating layer 3, outer semiconductive shielding layer 4, metal shielding layer 5 from inside to outside successively, and metal shielding layer 5 has special outer protection Layer 12, the special outer sheath 12 includes a water-blocking layer 6, a high-density polyethylene sheath 7, an oxygen barrier layer 8, an armor layer 9, and a low-smoke and halogen-free sheath 10 from inside to outside.

Embodiment 2

[0017] Embodiment 2: as image 3 As shown, in this embodiment, the present invention has a conductor 1, an inner semiconductive shielding layer 2, an insulating layer 3, an outer semiconductive shielding layer 4, and a metal shielding layer 5 from the inside to the outside. The sheath 12, the special outer sheath 12 includes a water blocking layer 6, a low-smoke and halogen-free sheath 10, an oxygen barrier layer 8, an armor layer 9, and a high-density polyethylene sheath 7 from inside to outside.

Embodiment 3

[0018] Embodiment 3: as Figure 4 As shown, in the present embodiment, the present invention has conductor 1, inner semiconductive shielding layer 2, insulating layer 3, outer semiconductive shielding layer 4, metal shielding layer 5 from inside to outside successively, and metal shielding layer 5 has special outer protection Layer 12, the special outer sheath 12 includes a water-blocking layer 6, a high-density polyethylene sheath 7, an oxygen barrier layer 8, an armor layer 9, and a low-smoke and halogen-free sheath 10 from inside to outside. There is a semiconducting resistive water layer 11 between the metal shielding layer 5 and the outer semiconducting shielding layer 4 .

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PUM

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Abstract

The invention relates to an environment-friendly power cable used in subway. From inside to outside, the said environment-friendly power cable comprises of conductor (1), inner conductor screen layer (2), insulating layer (3), outer conductor screen layer (4), metal screen layer (5), and the special outer protecting layer (12) on the outside of the metal screen layer. From inside to outside, the special outer protecting layer (12) comprises of water-resisting layer (6), high-density polyethylene protecting layer (7), obstructing oxygen layer (8), armoring layer (9), low fume non-bittern protecting layer (10); or from inside to outside comprising of water-resisting layer (6), low fume non-bittern protecting layer (10), obstructing oxygen layer (8), armoring layer (9), high-density polyethylene protecting layer (7).

Description

technical field [0001] The invention belongs to the field of power cables, and in particular relates to an environment-friendly power cable for subways. Background technique [0002] Traditional subway power cables wrap kraft paper on the conductor, or wrap kraft paper and polypropylene alternately on the surface of the conductor, and then fill it with insulating oil to achieve power transmission through this structure. The power cable of this structure is easy to leak oil, and this structure determines that the power cable is flammable and explosive, and it will produce a lot of smoke when it catches fire. Therefore, when a fire breaks out, it is easy to cause heavy casualties and economic major losses. [0003] For the power cables used in the subway, keeping the power system working normally in the event of a fire is a key factor to ensure the safety of people in the tunnel. Therefore, it is necessary to protect the power system from the fire for a period of time after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02
Inventor 刘坚栋李斌卢宏超包耀文
Owner TEBIAN ELECTRIC APP CO LTD
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