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Direct-current cable of short-time power supply module for subway power system and preparation method thereof

A power system and power supply module technology, applied in the direction of power cables, cable/conductor manufacturing, insulated cables, etc., can solve problems that affect the safety and efficiency of subway operation, short service life, high hardness, etc., and achieve excellent electrical performance and physical Mechanical properties, improved service life, low hardness effect

Inactive Publication Date: 2018-02-06
天津金山电线电缆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing DC cables for short-time power supply modules of subway power systems have disadvantages such as high hardness, large outer diameter, and short service life, which seriously affect the safety and efficiency of subway operation.

Method used

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  • Direct-current cable of short-time power supply module for subway power system and preparation method thereof
  • Direct-current cable of short-time power supply module for subway power system and preparation method thereof
  • Direct-current cable of short-time power supply module for subway power system and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A DC cable for a short-time power supply module of a subway power system, including a conductor, an insulating layer, a waterproof layer, and an oxygen barrier sheath layer; the conductor (1) is sequentially arranged from the inside to the outside, and the conductor (1) is tinned soft round copper Composite stranding structure, the conductor (1) has an insulating layer (2), and the insulating layer (2) has a waterproof layer (3), and the waterproof layer (3) is an overlapping layer of aluminum-plastic composite tape and an extruded layer It is waterproof, and the waterproof layer (3) has an oxygen barrier layer (5) outside, and a sheath layer (6) is extruded outside the oxygen barrier layer (5).

[0044] The specific structure is as figure 1 , 2 , 3 shown. A highly flexible and high-capacity DC cable for a short-time power supply module of a subway power system provided by a preferred embodiment of the present invention, the cable includes a conductor 1, an insulating...

Embodiment 2

[0056] The preparation process of the DC cable for the short-time power supply module of the subway power system in Embodiment 1 of the present invention includes a stranding process, a re-twisting process, a wrapping process and a wrapping process. The specific implementation process is as follows:

[0057] A method for preparing a highly flexible and high-capacity DC cable for a short-time power supply module of a subway power system includes the following steps:

[0058] Step 1: stranding process, the tinned soft round copper wire is stranded, the pitch ratio of the stranding is 18 times, and the stranding direction is rightward;

[0059] Step 2: Re-twisting process, first re-twisting the first bundle of stranded conductors to obtain a re-twisted conductor, and then re-twisting the re-twisted conductor to obtain a conductor, the pitch diameter ratio of the re-twisted strand is 15 times, and the stranding direction is left Towards;

[0060] Step 3: Extrusion process, the i...

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Abstract

The present invention relates to a direct-current cable of a short-time power supply module for a subway power system and a preparation method thereof. The invention belongs to the technical field ofwires and cables. The direct-current cable of the short-time power supply module for the subway power system is characterized by comprising a conductor, an insulating layer, a waterproof layer, an oxygen-barrier layer and a jacket layer. The direct-current cable sequentially comprises the conductor (1) from inside to outside. The conductor (1) is of a tinned soft round copper wire composite stranded structure. The conductor (1) is provided with the insulating layer (2) and the insulating layer (2) is externally provided with the waterproof layer (3). The waterproof layer (3) is formed throughoverlapping and wrapping a layer of aluminum-plastic composite tape, and extruding the waterproof material on the layer of aluminum-plastic composite tape. The waterproof layer (3) is externally provided with the oxygen-barrier layer (5). The jacket layer (6) is extruded outside the oxygen-barrier layer (5). The direct-current cable is simple in process, convenient in operation, high in product flexibility, high in carrying-capacity and small in bending radius, and can withstand a short-time large current. Meanwhile, the direct-current cable is long in service life, anti-rat, anti-termite, environment-friendly, low in smoke, halogen-free, A-type in flame-resistant performance, ultraviolet ray-resistant and the like.

Description

technical field [0001] The invention belongs to the technical field of wires and cables, in particular to a DC cable for a short-time power supply module of a subway power system and a preparation method thereof. Background technique [0002] At present, urban rail transit has the characteristics of large capacity, fast speed, safety, punctuality, environmental protection, energy saving and land use. As a mode of rail transit, subway hardly occupies the street area and does not interfere with ground traffic. The obvious advantages such as safety, high speed, high punctuality rate, and less environmental pollution have been significantly developed quickly. The rapid development of the subway has also brought a huge market to the cable industry. [0003] The existing DC cables for the short-time power supply module of the subway power system have disadvantages such as high hardness, large outer diameter, and short service life, which seriously affect the safety and operation e...

Claims

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Application Information

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IPC IPC(8): H01B9/00H01B7/04H01B7/295H01B7/18H01B7/28H01B7/282H01B13/00
CPCH01B9/006H01B7/04H01B7/18H01B7/28H01B7/2806H01B7/282H01B7/295H01B13/00
Inventor 王永久曾智民程俊龙李胜涛程玉洁
Owner 天津金山电线电缆股份有限公司
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