Vacuum power cable

A power cable and vacuum technology, which is applied in the direction of power cables, insulated cables, rigid pipe cables, etc., can solve the problems of increasing the amount of insulating materials, and achieve the effects of less consumables, simple manufacture, and less energy consumption

Inactive Publication Date: 2009-04-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, with the continuous shortage of copper resources, it is gradually becoming a trend to replace copper with aluminum for power cable conductors, but after using aluminum wires, it is necessary to increase the amount of insulating materials

Method used

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  • Vacuum power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Segmented Assembly

[0027] A steel pipe, an aluminum pipe or an aluminum-plastic composite pipe is used as the outer sealing pipe 3, and the former two are coated with an anti-corrosion coating. The outer sealing tube 3 is connected in the following ways: 1. Mechanically detachable sealing method; 2. Welding method, which can be brazing, resistance welding, laser welding and other methods.

[0028] Conductive core 1 is aluminum or copper rod, bar, adopts screw connection, also can crimp with sleeve at connection. Teflon solid insulating support 4 is used between the conductive core 1 and the outer sealing tube 3 .

Embodiment 2

[0030] Continuous winding type

[0031] The outer sealing pipe 3 is welded longitudinally by steel or aluminum strips, rolled into corrugations, and coated with an anti-corrosion coating. The conductive core 1 is an aluminum or copper stranded wire, and is supported by ceramic solid insulation 4 .

Embodiment 3

[0033] Cable accessories

[0034] Rigid vacuum cables have only cable terminals and no intermediate connectors; for coiled cables, there are terminals and intermediate connectors. Both the terminal head and the intermediate connector are insulated by ceramics, and after the surface is metallized, it is welded with the conductive core and the metal shell to ensure vacuum sealing.

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PUM

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Abstract

The invention relates to a vacuum power cable which belongs to the power transmission technology field. The vacuum power cable comprises a conducting core, an external layer sealing pipe and a middle insulation layer. The vacuum power cable is characterized in that the middle insulation layer is composed of vacuum and a solid insulation support. The solid insulation support of hub structure is arranged between the conducting core and the external layer sealing pipe in uniform segments to avoid the collision of the conducting core and the external layer sealing pipe. The vacuum is used as the main insulation. The vacuum height is higher than 1.33*10<-2>Pa. the cable has the characteristics of less consumed material, low cost, simple manufacturing, small capacity and large transmission capacity. No oxidation and electric aging problems happen to the insulation and conductors. The service life of the cable is prolonged greatly. The cable is suitable to be used as power cable of middle and high voltage grade.

Description

technical field [0001] The invention relates to a vacuum power cable, in particular to a vacuum power cable mainly insulated by vacuum and supported by solid insulation. It belongs to the field of power transmission. Background technique [0002] At present, the vast majority of power cables are insulated with petroleum-based polyolefins. With the gradual depletion of petroleum, its price will further rise. In addition, with the continuous shortage of copper resources, it is gradually becoming a trend to replace copper with aluminum for power cable conductors, but the amount of insulating materials must be increased after using aluminum wires. [0003] The other is a compressed gas insulated cable, also known as a pipeline inflated cable, which is filled with SF with a certain pressure (generally 0.2-0.5MPa) between the inner and outer round tubes. 6 gas. The inner tube is a conductive core, which is supported in the outer tube at regular intervals by solid insulating gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/00H01B7/02H01B7/16H01B3/00
Inventor 王寿太王易
Owner SHANGHAI JIAO TONG UNIV
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