A kind of rectangular conductor
Technical field
The present invention relates to a kind of rectangular conductor and be applicable to the bus of various electric pressures, the conductor of transformer.
Background technology
The conductor industry of existing bus, transformer, in order to improve ampacity, to fall cost, has proposed copper clad aluminum wire, multiple fission copper or aluminium busbar.But do not find a way that more produces effect and fall cost, improve ampacity.It is the conductor that the insulation isolation is arranged between copper, aluminium, copper cover aluminum, copper aluminium that the conductor of above-mentioned series products adopts, its shortcoming:
1. the copper ampacity is little, temperature rise, and cost is high.
2. the aluminium ampacity is little, temperature rise, the aluminium conductance with copper than relative poor and easy oxidation.
3. the copper cover aluminum ampacity is little, temperature rise, copper cover aluminum complex process, be metallurgical binding (being used in conjunction with of prior art copper and aluminium must be metallurgical binding, and not so electrochemical reaction is arranged), the adhesiveness of copper aluminium is that copper and aluminium are not stratified, be an integral body, electric current distribution is inhomogeneous.Prismatic copper bar is compared with copper clad aluminum wire, and copper bar is larger than copper clad aluminum wire ampacity, and waste and old copper clad aluminum wire is in recovery, and copper aluminum separation technique complexity is seriously polluted.
4. the shortcoming of multiple fission copper or aluminium busbar: ampacity is little, and temperature rise having the insulation isolation between copper aluminium, and the reaction of copper Al electrochemical has solved, but copper, aluminium are two independent conductors, equipotential not, and the electromagnetic field phase mutual interference between two conductors, reduce ampacity mutually.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art; (oxide layer is very thin for the bulk oxidation layer of proposition reservation copper and aluminium alloy; resistance is very little) as isolated protective layer; prevent electrochemical reaction; it is the overlap joint combination that copper coordinates with aluminium alloy (as almag, rare earth aluminium alloy), and by the division of isolated protective layer, copper, aluminium alloy form two relatively independent but conductors that current potential equates; can not produce electromagnetic interference each other, the even effect of electric current distribution improves greatly.
Realize the technical scheme of the object of the invention: a kind of rectangular conductor of the present invention is to adopt two copper strips folder aluminum alloy strips (aluminum alloy strip is in centre) for: rectangular conductor, with the bulk oxidation layer of copper strips, aluminum alloy strip as separator.Above-mentioned conductor according to electric pressure need can be on conductor additional insulating barrier or shield dielectric layer.
The invention has the beneficial effects as follows: a kind of rectangular conductor is to use the bulk oxidation layer of copper and aluminium alloy as isolated protective layer; it is the overlap joint combination that copper coordinates with aluminium alloy, and the even effect of electric current distribution is than between copper, aluminium, copper cover aluminum (combination of the copper metallurgy of aluminium), copper aluminium, having the conductor of insulation isolation good.Prismatic copper bar is compared with copper folder aluminium alloy row, and copper folder aluminium alloy row ampacity is large, and temperature rise is low.The formed conductor of a kind of rectangular conductor is larger than the conductor ampacity that the insulation isolation is arranged between copper, aluminium, copper cover aluminum, copper aluminium, and temperature rise is low.The application that metal oxide layer is done isolated protective layer has realized improving the energy-saving effect that ampacity, temperature rise are low, fall cost.
Below in conjunction with accompanying drawing, the present invention is further described
The accompanying drawing explanation
Accompanying drawing 1 (rectangular conductor) is structural representation of the present invention.
In accompanying drawing 1: 1. copper, 2. aluminium alloy row.
In accompanying drawing 1: 1. copper strips, 2. aluminum alloy strip.
Accompanying drawing 2 (rectangular conductor) is two of structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, a kind of rectangular conductor of the present invention, the method of making: method one: the bulk oxidation layer that retains copper sheathing and aluminium alloy bars, copper sheathing is enclosed within on aluminium alloy bars, [wall thickness of copper sheathing is determined (0.1mm-10mm) according to size of current, the diameter of aluminium alloy bars is determined (1mm-100mm) according to size of current], by rolling row's machine, the copper sheathing aluminium alloy bars is pressed into to copper (1) aluminium alloy row (2); Method two: the bulk oxidation layer that retains copper sheathing and aluminium alloy bars, with copper strips, evenly be coated on aluminium alloy bars, the seam welding of copper strips is become to copper sheathing, by rolling row's machine, the copper sheathing aluminium alloy bars is pressed into to copper (1) aluminium alloy row (2), the sectional area of copper (1) can account for 1%~90% of rectangular conductor total sectional area according to size of current.Described.Above-mentioned conductor according to electric pressure need can be on conductor additional insulating barrier or shield dielectric layer.
As shown in Figure 2, a kind of rectangular conductor of the present invention, make the method for rectangular conductor: retain the bulk oxidation layer of copper (1) and aluminum alloy strip (2), aluminium strip (2) is stacked in to two bronze medals (1) middle, aluminium strip (2) is wide with copper (1).The sectional area of copper (1) can account for 1%~90% of rectangular conductor total sectional area according to size of current.Above-mentioned conductor according to electric pressure need can be on conductor additional insulating barrier or shield dielectric layer.
Production process as stated above, rectangular conductor can be made busbar, transformer coil.