CN2904215Y

CN2904215Y - Aluminium alloy core alluminium twisted cross-linked polytene insulated water resistance overhead cable

Info

Publication number: CN2904215Y
Application number: CN 200620041479
Authority: CN
Inventors: 吴才彪; 成战利
Original assignee: SHANGHAI FEIHANG ELECTRIC WIRE AND CABLE CO Ltd; Shanghai Municipal Electric Power Co
Current assignee: SHANGHAI FEIHANG ELECTRIC WIRE AND CABLE CO Ltd; Shanghai Municipal Electric Power Co
Priority date: 2006-04-29
Filing date: 2006-04-29
Publication date: 2007-05-23
Anticipated expiration: 2016-04-29

Abstract

The utility model discloses a polyethylene water-resisting overhead cable which is of aluminium alloy cores and aluminum strands crosslinked, comprising a cable conductor, an internal shield covering the cable conductor, an insulating layer and water-resisting fiber arranged among the cable cores. The cable conductor comprises an inner core and an outer core. The inner core is made up of central conductors in the center of the cable, and multi-strands aluminium alloy conductors. The outer core is made up of multi-strands pure aluminium conductors above the inner core. Aluminium alloy conductors, pure aluminum conductors and water-resisting fibers form a core bundle through twisting and compacting. Because the technique proposal of the utility model is adopted, the advantages of the various existing cables are integrated, the conductivity of the overhead cable is enhanced and the weight is reduced when aluminum alloy core cables and steel core aluminum strand wires are compared with. And comparing with aluminum core cables, tensile strength of cables are enhanced and erection span of overhead cables is enlarged. At the same time, vertical water-resisting function is realized; therefore the accident of stress line breakage due to cable conductor corrosion is avoided.

Description

The crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand

Technical field

The utility model relates to a kind of electric wire, is specifically related to the crosslinked polyetylene insulated aerial cable that blocks water of a kind of aluminium alloy core, aluminium strand.

Background technology

At present, the 10kV insulated circuit that set up in the suburb is the aluminium core, and span can not effectively amplify, the span of insulated conductor generally can not be greater than 50 meters, and present suburb or rural area plain conductor overwhelming majority spans are 65-70 rice, and when former plain conductor transposing was common insulated aluminum wire, more place needed inserted link.The part inserted link is down to the span inequality, and the part not place of inserted link will cause following a series of problem: difficult design, and expense increases; The circuit discrepancy in elevation, sag strengthen, windage yaw is not enough, hidden danger increases; Intensity is impaired, nargin reduces.

Former insulated aluminum wire does not block water, connect place's joining seam owing to prop up, insulated conductor has opening, though wrapped the insulative water-proof adhesive tape in the joint, but water still can therefrom infiltrate, and the rainwater that accumulates over a long period core along the line always penetrates in the middle of the lead sag, because the acid rain influence, with aluminium conductor generation chemical reaction, progressively corrosion causes the stress broken string.

If adopt insulated copper wire, (1) certainly will will increase cost (be aluminium 2.55 times); (2) the conductor unit quality is big, and sag is big, and span can not be put greatly; Coefficient of safety can not be too little, otherwise wire tension is big, and electric pole is stressed influential; (3) the stolen phenomenon of lead is serious;

If adopt the insulation steel reinforced aluminium conductor, though tension force is big, have following shortcoming: (1) its steel core and conductor are not equivalent lifes, corrode easily at peeling opening part and lead sag central authorities steel core; (2) because its steel core resistance ratio aluminium alloy is big, so the insulated conductor area increases much the increase of lead blast; (3) steel proportion is much larger than aluminium alloy, and quality is also big, so sag also will increase.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of aluminium alloy core, aluminium strand the crosslinked polyetylene insulated aerial cable that blocks water, and it can improve the tensile strength and the conductance of cable, increases the span of setting up of aerial cable.

The purpose of this utility model is achieved by following technical scheme: comprise the insulating barrier of cable conductor, parcel cable conductor and be placed in the fiber that blocks water between conductor, it is characterized in that the inner core that described conductor is made of the multi-lever and multi-strand aluminium alloy conductor that is positioned at cable center and be positioned at the outer field outer core that constitutes by multiply fine aluminium lead of inner core and constitute a core bundle body in stranded mode of pressing with the fiber that blocks water.

The above-mentioned crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand, wherein, described inner core is made of seven strands of aluminium alloy conductors, and outer core is made of 12 strands of fine aluminium leads.

The above-mentioned crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand, wherein, the diameter of described aluminium alloy conductor and fine aluminium lead is 2.4mm or 3.04mm.

The above-mentioned crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand, wherein, the fiber that blocks water of described filling, at the inner core center conductor is three single lines, outside the multiply aluminium alloy conductor of center conductor or inner core and outside be six roots of sensation single line between the core, core is outward three single lines outside.

The above-mentioned crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand, wherein, the inner surface of the insulating barrier of described parcel conductor is covered with screen.

Owing to adopted the technical solution of the utility model, cable conductor is formed by being positioned at the inner core that cable center's multi-lever and multi-strand aluminium alloy conductor constitutes and being positioned at the outer field outer core that is made of multiply fine aluminium lead of inner core, and aluminium alloy conductor, fine aluminium lead constitute a core bundle body with the fiber that blocks water in stranded mode of pressing.Combine the advantage of various existing cables, compare, improved the conductance of aerial cable, reduced weight with aluminium alloy core cable, steel reinforced aluminium conductor cable; Compare with aluminium cable, improved the tensile strength of cable, increased the span of setting up of aerial cable; Realize vertical water stop function simultaneously, can avoid the stress broken string accident that causes because of the cable conductor corrosion.

Description of drawings

Fig. 1 is the sectional view of the crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand of the present utility model.

Embodiment

See also Fig. 1, the crosslinked polyetylene insulated aerial cable 1 that blocks water of aluminium alloy core, aluminium strand of the present utility model is made of conductor 2, the fiber 3 that blocks water, screen 4 and insulating barrier 5.The fiber 3 that blocks water that conductor 2 comprises inner core 21 and outer core 22 and is placed in 2 of conductors, wherein, inner core 21 is made of center conductor and the six strands of seven strands of aluminium alloy conductors around center conductor that are positioned at cable 1 center totally, outer core 22 is positioned at the outer of inner core 21 and is made of 12 strands of fine aluminium leads, and inner core 21 and outer core 22 constitute a core bundle body with the fiber 3 that blocks water in stranded mode of pressing.

Inner core 21 and outside core 22 with the fiber 3 that blocks water during with stranded pressing, the fiber 3 that blocks water of filling is three single lines at inner core 21 center conductors, or inner core 21 outer around the multiply aluminium alloy of center conductor and outside be six roots of sensation single line between the core 22, core 22 is three single lines outward outside.Adopt above-mentioned filling mode, promptly guaranteed the stability and the roundness of the construction of cable, and guaranteed vertical block-water performance of cable, increased the conductance of conductor again, improved the ability of comprehensively breaking of cable simultaneously, guaranteed that can be used for the built on stilts of big span lays.

When cable 1 sectional area is 70mm ²The time aluminium alloy conductor and fine aluminium lead diameter adopt 2.4mm; When cable 1 sectional area is 120mm ²The time aluminium alloy conductor and fine aluminium lead diameter adopt 3.04mm.

Screen 4 is a semi-conductive layer, and it is coated on conductor 2 peripheries equably; Crust 5 can adopt the weather-proof shape crosslinked polyethylene insulation material of black, and it closely is extruded on screen 4 outer walls, not only satisfies insulating requirements, has increased the tensile strength and the anti-vibration performance of cable again.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims

1. an aluminium alloy core, aluminium twists the crosslinked polyetylene insulated aerial cable that blocks water, comprise the insulating barrier of cable conductor, parcel cable conductor and be placed in the fiber that blocks water between conductor, it is characterized in that the inner core that described conductor is made of the multi-lever and multi-strand aluminium alloy conductor that is positioned at cable center and be positioned at the outer field outer core that constitutes by multiply fine aluminium lead of inner core and constitute a core bundle body in stranded mode of pressing with the fiber that blocks water.

2. the crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand according to claim 1 is characterized in that described inner core is made of seven strands of aluminium alloy conductors, and outer core is made of 12 strands of fine aluminium leads.

3. the crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand according to claim 1 is characterized in that the diameter of described aluminium alloy conductor and fine aluminium lead is 2.4mm or 3.04mm.

4. the crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand according to claim 1, it is characterized in that, the fiber that blocks water of described filling, at the inner core center conductor is three single lines, outside the multiply aluminium alloy conductor of center conductor or inner core and outside be six roots of sensation single line between the core, core is outward three single lines outside.

5. the crosslinked polyetylene insulated aerial cable that blocks water of aluminium alloy core, aluminium strand according to claim 1 is characterized in that the inner surface of the insulating barrier of described parcel conductor is covered with screen.