CN201251939Y

CN201251939Y - Bimetallic compound strand cable for power transmission

Info

Publication number: CN201251939Y
Application number: CNU2008201607914U
Authority: CN
Inventors: 陈天生; 邵剑波
Original assignee: WUJIN HENGTONG METAL STEEL WIRE CO Ltd CHANGZHOU CITY
Current assignee: WUJIN HENGTONG METAL STEEL WIRE CO Ltd CHANGZHOU CITY
Priority date: 2008-10-13
Filing date: 2008-10-13
Publication date: 2009-06-03
Anticipated expiration: 2018-10-13

Abstract

The utility model relates to a wire bimetallic compound strand cable for power transmission, in particular to coastal humid areas and heavy industrial pollutant areas, and comprises an inner core and an outer strand layer. The inner core is composed of at least one copper-clad steel wire and the outer strand layer is formed by a plurality of copper-clad aluminum wires twisted on the inner core. The wire bimetallic compound strand cable integrates high tensile strength of steel, high electric conductivity of copper, high corrosion resistance, low density of aluminum and low price into one body. More particularly contacting interfaces of strand cables are copper, which avoids the contacting electric double corrosion, largely enhances the entire resistance to corrosion, eliminates the difference of inner layers and outer layers of original electric wires and greatly extends the service life of the whole strand wires.

Description

Electric power transfer bimetallic composite twisted wire

Affiliated field

The utility model relates to a kind of electric power transfer lead, is specially adapted to the bimetallic composite twisted wire of coastal humid area and heavy industry IA.

Technical background

As everyone knows, the conductivity of copper, corrosion resistance are better than aluminium and steel, but the copper resource is more and more rare in the world, and price is also more and more expensive, therefore aluminium occurred for copper in reasonable range, the technology of copper take place of steel.

The used lead of China's electric power system generally is to be the steel reinforced aluminium conductor of the outside stranded pure aluminum wire of steel core with the zinc-coated wire at present, under the perfect condition, and transmission line design service life 30 years; But in fact, the zinc-plated steel core of steel reinforced aluminium conductor heavy corrosion just about 15 years, the steel core life-span, both did not match far below outer strand aluminum steel, and it is influence the main cause that electric power system normally moves.Along with the development of The modern industry, atmospheric environment worsens, particularly coastal humid area and heavy industry IA, not only make the life-span of zinc-plated steel core shorter, be directly exposed to aluminum steel in the atmospheric environment and also be subjected to corrosion-damagedly, cause conductivity to descend, the power transmission line consumption increases, and is in the state of going to work braving one's illness; And it is along with the intensification of extent of corrosion, zinc-coated wire as " strengthening core " its intensity also more and more a little less than, the area of indivedual seriously corrodeds even about 10 years, just need thread-changing.

Summary of the invention

The purpose of this utility model is to provide a kind of good conductivity, corrosion resistance height, long service life and the high electric power transfer of tensile strength bimetallic composite twisted wire.

The utility model realizes that its purpose technical scheme is, a kind of electric power transfer bimetallic composite twisted wire is made of inner core and outer strand layer, and described inner core is made up of at least one copper covered steel wire, and outer strand layer is combined to form by the multiply copper-clad aluminum conductor of concentric stranding on inner core.

And the inner core that described copper covered steel wire is formed can be single line individual layer or multi-thread structure of two layers, and described double-decker to be with single copper covered steel wire be the structure of center and outside hinge joint multiply copper covered steel wire;

As preferred embodiment of the present utility model: all single line concentric strandings in the described twisted wire, the strand of adjacent layer are on the contrary, and single line evenly closely is stranded on inner core or the interior strand layer under every layer, and any layer lay ratio is not more than the lay ratio of adjacent inner layer; Promptly when inner core is double-decker: the direction of lay of described twisted wire inner core is opposite with multiply copper-clad aluminum conductor direction of lay.

The utility model adopts the copper covered steel wire of high conductivity, high corrosion-resistant of the high-tensile integrate steel and copper as twisted wire inner core wire rod, and adopting the low-density of high conductivity, corrosion resistance and the aluminium of collection copper, low price is in the copper-clad aluminum conductor of the one outer strand deck wire as twisted wire; The wire rod combination of above-mentioned two kinds of structures is on the basis of the electricity mechanical index that fully satisfies the electric power delivery guidewire; What particularly protrude is that above-mentioned twisted wire contact interface is copper, has avoided the voltaic couple corrosion, has improved whole corrosion resistance greatly, and has eliminated former live wire internal layer and the skin difference in useful life, the very big life-span that must prolong whole twisted wire.

The utility model is because its above-mentioned characteristic: be specially adapted to seriously area of stronger coastal humid area of corrosivity and industrial pollution.

Description of drawings

Fig. 1 is the schematic cross-section of the utility model embodiment 1;

Fig. 2 is the schematic cross-section of the utility model embodiment 2.

Concrete enforcement

Technical solutions of the utility model are described further by embodiment below in conjunction with accompanying drawing:

Embodiment 1: as shown in Figure 1, this electric power transfer bimetallic composite twisted wire: inner core is that line diameter is that 4.0mm, conductance are the cold-drawn copper steel clad wire 1 of 25%IACS, and outer strand layer is that 4.2mm, conductance are that the cold drawn copper-clad aluminum conductor 2 of 70%IACS is formed by the multiply diameter of concentric stranding.

Promptly serve as reasons inner steel wire 1-1 and bag of copper covered steel wire is connected on the compound formation of copper layer 1-2 of periphery, the copper cover aluminum single line is and is connected on by the aluminum steel 2-2 of inside and bag that peripheral copper layer 2-1 is compound to be constituted, and two kinds of composite wires all adopt " vertically clad welded drawing " manufactured to form.

Embodiment 2: as shown in Figure 2, this composite twisted wire inner core is for being that 3.5mm, conductance are that the cold-drawn copper steel clad wire 1 of 30%IACS is formed by the multiply diameter, outer strand layer is that 3mm, conductance are that the cold drawn copper-clad aluminum conductor 2 of 65%IACS is formed by the multiply diameter of concentric stranding, and the stranded direction of the stranded direction of copper covered steel wire and copper-clad aluminum conductor is opposite.

Two kinds of bimetallic conductors in the utility model copper layer thickness separately can calculate definite according to conductance.

The alternative pure copper wire of the product that the utility model is produced uses, under the identical condition of D.C. resistance, pull-off force of the present utility model can improve about 18%, linear mass can descend about 17.5%, it is more convenient to transport, construct, especially the weight ratio of copper accounts for about 1/3 in the utility model, so can save copper resource, corresponding reducing cost greatly.

Claims

1, a kind of electric power transfer bimetallic composite twisted wire is made of inner core and outer strand layer, and it is characterized in that: described inner core is made up of at least one copper covered steel wire, and outer strand layer is combined to form by the multiply copper-clad aluminum conductor of concentric stranding on inner core.

2, according to the described electric power transfer of claim 1 bimetallic composite twisted wire, it is characterized in that: described inner core is the single line single layer structure.

3, according to the described electric power transfer of claim 1 bimetallic composite twisted wire, it is characterized in that: described inner core is the hinge joint double-decker at center with the single line for what formed by the multiply copper covered steel wire.

4, according to the described electric power transfer of claim 3 bimetallic composite twisted wire, it is characterized in that: the inner core direction of lay is opposite with the direction of lay of outer strand layer.