CN201266509Y

CN201266509Y - Copper wire sparse winding shielding high-voltage cable

Info

Publication number: CN201266509Y
Application number: CNU2008200399115U
Authority: CN
Inventors: 刘军; 陈晓军; 夏亚芳; 赵文明; 蒋胜
Original assignee: Wuxi Jiangnan Cable Co Ltd
Current assignee: Wuxi Jiangnan Cable Co Ltd
Priority date: 2008-07-17
Filing date: 2008-07-17
Publication date: 2009-07-01
Anticipated expiration: 2018-07-17

Abstract

The utility model provides a copper wire space-winding shielding high-voltage cable, comprising a wire core which sequentially consists of a conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer, a space-winding copper wire and a tied copper belt; and a semiconductive damping layer is arranged between the insulation shielding layer and the space-winding copper wire. As the semiconductive damping layer is arranged between the insulation shielding layer and the space-winding copper wire, the plastic has expansion space when the high-voltage cable gets electricity and is heated and the space-winding copper wire is not embedded in the insulation layer; simultaneously, under normal room temperature condition, the semiconductive damping layer leads the insulation shielding layer to be closely contacted with the space-winding copper wire, thus greatly improving the stability and safety when the high-voltage cable is in use.

Description

Copper wire is dredged around the shielding high-tension cable

Technical field

The utility model relates to a kind of high-tension cable, and particularly a kind of stability, safe copper wire are dredged around the shielding high-tension cable.

Background technology

The high-tension cable that the prior art kind is used is dredged in the actual manufacture process of geometric pattern medium and high voltage cable at copper wire, core successively by conductor, conductor screen, insulation, insulation shielding, thin around copper wire, tighten copper strips and constitute.As everyone knows, the thermal coefficient of expansion of plastics and metal differs greatly, after the high-tension cable fabrication and installation are finished, and its insulation shielding and to dredge be tight contact between copper wire, the centre has not a particle of the gap.When high-tension cable normally moved, conductor can generate heat, and the working temperature of high-tension cable can reach 90 ℃.Because insulation thickness is thick, its coefficient of expansion is much larger than copper wire, because insulation shielding closely contacts with copper wire, when the high-tension cable temperature is higher, copper wire can embed in the insulating barrier, causes that the insulation effective thickness reduces, and damages insulating barrier, thereby cause cable to be scrapped easily, produced great potential safety hazard.

The utility model content

The utility model purpose is not enough in order to solve in the prior art, provides a kind of stability, safe copper wire to dredge around the shielding high-tension cable.

To achieve these goals, the utility model discloses a kind of copper wire dredges around the shielding high-tension cable, comprise successively by conductor, conductor shield, insulating barrier, insulation screen, dredge, tighten the core that copper strips constitutes, at insulation screen with dredge and between copper wire, also be provided with the semi-conductive buffer layer around copper wire.

The utility model, the thickness of described semi-conductive buffer layer is less than 2mm.

The utility model, preferably, the thickness of described semi-conductive buffer layer is 0.5mm.Increase the semi-conductive buffer layer of one deck 0.5mm thickness, its effect is the expansion space that keeps high-tension cable adstante febre plastics, makes to dredge can not embed insulating barrier around copper wire; Simultaneously, under the normal room temperature condition, it plays insulation shielding and the thin effect that closely contacts around copper wire of allowing again.

The utility model, described by conductor, conductor screen, insulation, insulation shielding, dredge around copper wire, to tighten copper strips all same as the prior art, can also can in three-core cable, use at single-core cable.

The utility model is owing at insulation screen and the thin semi-conductive buffer layer that is provided with between copper wire, in the expansion space that keeps high-tension cable adstante febre plastics, make to dredge can not embed insulating barrier around copper wire; Simultaneously, under the normal room temperature condition, it plays insulation shielding and the thin effect that closely contacts around copper wire of allowing, stability and fail safe when having improved high-tension cable work greatly again.

Description of drawings

Fig. 1 is that the utility model embodiment 1 single core copper wire is dredged the schematic cross-section around the shielding high-tension cable.

Fig. 2 is that the utility model embodiment 2 three core copper wires are dredged the schematic cross-section around the shielding high-tension cable.

Embodiment

Below in conjunction with accompanying drawing the utility model is done further explanation.

Embodiment 1: as shown in Figure 1, present embodiment discloses a kind of single core copper wire and has dredged around the shielding high-tension cable, comprise successively by conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4, semi-conductive buffer layer 5, dredge, tighten the core that copper strips 7 constitutes, sheath 8 is arranged at the core peripheral hardware around copper wire 6.Sheath can and make up sheath for metal sheath, rubber and plastic sheath, and is same as the prior art.

Embodiment 2: as shown in Figure 2; present embodiment discloses a kind of three core copper wires and has dredged around the shielding high-tension cable; comprise three cores; every core successively by conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4, semi-conductive buffer layer 5, dredge around copper wire 6, tighten copper strips 7 and constitute; packing 9 is arranged between core and core; and be provided with twining package tape 10 at skin, be provided with protective layer 8 at outermost layer.

The utility model provides a kind of copper wire that is used for to dredge around the thinking and the method that shield high-tension cable; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.The all available prior art of each component part not clear and definite in the present embodiment is realized.

Claims

1, a kind of copper wire is dredged around the shielding high-tension cable, comprise successively by conductor, conductor shield, insulating barrier, insulation screen, dredge, tighten the core that copper strips constitutes around copper wire, it is characterized in that, at insulation screen and the thin semi-conductive buffer layer that between copper wire, is provided with.

2, copper wire according to claim 1 is dredged around the shielding high-tension cable, it is characterized in that the thickness of described semi-conductive buffer layer is less than 2mm.

3, copper wire according to claim 2 is dredged around the shielding high-tension cable, it is characterized in that the thickness of described semi-conductive buffer layer is 0.5mm.