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Rail transit vehicle cable with rated AC voltage of 3kV or below

A rail transit vehicle, rated voltage technology, used in power cables, insulated cables, flexible cables, etc., can solve the problems of less than 150 ° C, no fire resistance, etc., and achieve stable conductor structure, low corrosion, and volume. small effect

Pending Publication Date: 2019-08-30
东方交联电力电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the cables provided for rail transit vehicles are basically flame-retardant, low-smoke, halogen-free, and heat-resistant cables. Although they can only withstand heat up to 125°C, they cannot reach 150°C at all, and they have no fire resistance.

Method used

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  • Rail transit vehicle cable with rated AC voltage of 3kV or below
  • Rail transit vehicle cable with rated AC voltage of 3kV or below
  • Rail transit vehicle cable with rated AC voltage of 3kV or below

Examples

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Embodiment Construction

[0022] Such as figure 1 , 2 As shown in , 3, a cable for rail transit vehicles with an AC rated voltage of 3 kV and below includes a conductor 1, and the outside of the conductor 1 is coated with a fireproof layer 2 and an insulating outer sheath 3 in turn; the specification of the conductor at 16mm 2 and below, the conductor adopts tinned annealed copper wire 4, which is twisted into conductor 1 by layering and small pitch, the central layer is a tinned copper wire, and the maximum number of twisted layers is 4 layers. Depending on the cross-section of the conductor, each layer is 6, 12, 18, and 24 tinned copper wires, the outermost layer is twisted to the left, and the middle twisting direction is right, left, and right from outside to inside. In the direction, the stranding pitch of the middle layer is not greater than 14 times the outer diameter of the stranding, and the stranding pitch of the outermost layer is not greater than 10 times the outer diameter of the strandi...

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Abstract

The invention discloses a rail transit vehicle cable with rated AC voltage of 3kV or below, comprising a conductor which is coated with a fireproof layer and an insulating outer sheath in turn. The specification of the conductor is 16mm<2> or below. The conductor is formed by stranding tin-plated soft copper wires based on layering and small pitch. The center layer includes one tin-plated copper wire. The conductor has four layers, which are composed of 6, 12, 18 and 24 tin-plated copper wires respectively. The tin-plated copper wires in the outermost layer are stranded to the left. The tin-plated copper wires in the middle layers are stranded to the right, to the left and to the right respectively from outside to inside. The stranding pitches of the middle layer are not more than 14 timesof the outer diameter of stranding, and the stranding pitch of the outermost layer is not more than 10 times of the outer diameter of stranding. The structure design is reasonable, and the conductorstructure is optimized, so that the conductor structure is stable, round and compact, does not loosen easily and can be repeatedly bended and dragged without deformation.

Description

technical field [0001] The invention relates to the technological field of changing the technical structure of electric wires for rail transit vehicles, in particular to a flexible fireproof and heat-resistant thin-wall insulated cable for rail transit vehicles with an AC rated voltage of 3 kV and below. Background technique [0002] At present, my country's urban rail transit has entered a period of rapid development, and rail transit will become the backbone of public transportation in megacities and the main public transportation mode in large and medium-sized cities. As one of the supporting electrical equipment for rail transit vehicles to transmit energy and transmit information - cables for rail transit vehicles play an important role in the entire rail transit system. At present, the reliability and safety of cables for rail transit vehicles are not up to the requirements for use, and the flexibility, fire resistance, and heat resistance of the cables are relatively ...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/04H01B7/29H01B7/295H01B9/00H01B3/44
CPCH01B9/006H01B7/29H01B7/295H01B7/04H01B7/292H01B7/0275H01B3/441
Inventor 曹奎红赵国辉冯增华赵建国王玉龙
Owner 东方交联电力电缆有限公司
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