CN102682872B - Semihard aluminum wire, overhead wire and preparation method thereof - Google Patents
Semihard aluminum wire, overhead wire and preparation method thereof Download PDFInfo
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- CN102682872B CN102682872B CN201110066229.1A CN201110066229A CN102682872B CN 102682872 B CN102682872 B CN 102682872B CN 201110066229 A CN201110066229 A CN 201110066229A CN 102682872 B CN102682872 B CN 102682872B
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Abstract
The invention belongs to the field of electrotechnics, relates to an aluminum rod with a specific state, a semihard aluminum single wire, an overhead electric transmitting wire with the semihard aluminum single wire serving as a conductor layer and a preparation method of the semihard aluminum single wire. The aluminum rod with the specific state is prepared by controlling a casting process of the aluminum rod, and an aluminum single wire conductor which has the semihard characteristic and is stable in performance is directly prepared by controlling a drawing process. The preparation method of the semihard aluminum single wire has the advantages of being short in flow and simple to operate and the like. The prepared semihard aluminum single wire conductor consumes little electric energy and is stable in performance. The overhead electric transmitting wire made by enabling the semihard aluminum single wire to serve as a conductor material has the advantages of being energy-saving and good in construction characteristic and the like.
Description
Technical field
The invention belongs to electrical technology field, relate to a kind of have the aluminium bar of particular state, a kind of half duralumin single line and half duralumin single line is conductor layer thus overhead power transmission conducting wire and preparation method thereof.
Background technology
Overhead power transmission conducting wire is comprised of electric conducting material and backing material, and electric conducting material comprises aluminium and aluminium alloy, and backing material comprises galvanized steel wire, aluminium-clad steel wire, carbon fiber or other composite material plugs etc.At present, using the most extensively overhead power transmission conducting wire is steel reinforced aluminium conductor, and its conductor material is hard-drawn aluminium wire, and main performance index is that intensity is not less than 160MPa, and the DC resistivity of 20 ℃ is not more than 0.028264 Ω mm
2/ m.In order to reduce the electric energy loss in transmission of electricity process, the domestic overhead power transmission conducting wire being formed as electric conducting material by annealed aluminum wire that developed again subsequently, the main performance index of this annealed aluminum wire is that intensity is 60～90MPa, and the DC resistivity of 20 ℃ is not more than 0.02737 Ω mm
2/ m, percentage elongation is not less than 20%.This overhead power transmission conducting wire structure consisting of as electric conducting material annealed aluminum wire comprises compound core conducting wire, steel core soft aluminum conductor and gap-type conductor etc.The overhead power transmission conducting wire that contrast consists of as electric conducting material hard-drawn aluminium wire, this soft aluminum conductor, because resistivity is lower, has obvious energy-saving effect.But, in work progress, because annealed aluminum wire intensity is lower, conductive line surfaces easy damaged or damage, to wire, construction brings larger difficulty.In patent CN201498231U, mention and at soft aluminum conductor skin, extrude one deck semi-conductive layer and reduce the frictionally damage of wire in work progress.This method does not also adopt at present in actual production.
In light of this situation, the overhead power transmission conducting wire that adopts the aluminum steel with semihard feature of a kind of intensity between hard-drawn aluminium wire and annealed aluminum wire to form as conductor material can be taken into account transmission performance and workability simultaneously.Current China mainly contains the process of preparing of two kinds of semi-hard-drawn aluminum wires, and a kind of method is for adopting common electrical aluminum rod through " draw-anneal-drawing again " technique; Another kind method is for adopting common electrical aluminum rod through " drawing-annealing " technique.A kind of front method is mainly to make material softening by annealing, through suitable deflection, draw and obtain semi-hard-drawn aluminum wire again, a kind of rear method is by adopting suitable annealing process, control recrystallization and grain growth degree and stress elimination degree etc. and make aluminum steel keep certain intensity and good conductance, obtain semi-hard-drawn aluminum wire.Because these two kinds of techniques relate to the factors such as annealing process and deflection control simultaneously, production technology is comparatively complicated, and technique controlling difficulty is also larger, causes final semi-hard-drawn aluminum wire performance stable not, fluctuates larger.
Summary of the invention
The object of the invention is to provide a kind of aluminium bar, half duralumin single line and overhead power transmission conducting wire with particular state and preparation method thereof, to overcome the deficiencies in the prior art.
The present invention is by the aluminium bar of preparation particular state, then by controlling drawing process, directly preparation has the aluminium single line conductor of semihard feature and stable performance, the overhead power transmission conducting wire consisting of as conductor material this half duralumin single line is compared the current application overhead power transmission conducting wire that hard-drawn aluminium wire forms as conductor material the most widely and is had advantages of that electric energy loss is little, and compare the overhead power transmission conducting wire consisting of as conductor material annealed aluminum wire, to have construction simple and convenient, and the conductive line surfaces advantage such as easy damaged or damage not.
First, the invention provides a kind of aluminium bar and preparation method thereof.
An aluminium bar, its diameter is 8～12mm; Its main performance index: tensile strength is 70～110MPa; Percentage elongation is not less than 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
The preparation method of aluminium bar of the present invention, comprises the steps:
1) aluminium ingot melting: obtain aluminium liquid after the weight percentage of aluminium is not less than to the fusing of 99.70% aluminium ingot, the aluminium liquid of acquisition is carried out to refining to adjust or to control the content of impurity in aluminium liquid in holding furnace; Wherein, refining temperature control is 710～730 ℃.
Preferably, during refining, first adopt solid refined flux aluminium coating liquid surface to carry out refining treatment, then adopt chlorine nitrogen mixture gas to be blown in aluminium liquid, to carry out refining treatment;
Further, described solid refined flux is selected from NaCl, KCl, CaF
2and AlF
6in one or more, and the addition of solid refined flux is 5～8kg/t aluminium liquid; The volumn concentration of chlorine in described chlorine nitrogen mixture gas, as be 20%.
2) standing: the aluminium liquid of refining is standing.
Preferably, the described standing time is 40～60 minutes;
3) aluminium liquid holding furnace being flowed out, when through chute, adopts glass fiber mesh bag or foam ceramic tile to filter; Wherein, in the rear aluminium liquid of filtration, major impurity element and weight percentage thereof are controlled and are: Si≤0.11%, and Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%, and in aluminium liquid, the weight percentage control of aluminium is: Al >=99.7%.
4) the aluminium liquid after filtering enters casting machine crystallizing wheel and carries out direct casting and obtain ingot casting, wherein, the cast temperature of aluminium liquid is 680～710 ℃, and crystallizing wheel rotating speed is 2.5～3r/min, cooling water pressure is not less than 0.3MPa, and surface temperature control is within the scope of 450～500 ℃.
5) ingot casting step 4) obtaining directly enters tandem rolling unit and is rolled the described aluminium bar of acquisition, and the finishing temperature of wherein said rolling is controlled within the scope of 260～280 ℃.
Preferably, the described operation of rolling adopts the rolling of band Minimal Tension, and adopts emulsion breaker roll to carry out Cooling and Lubricator;
The present invention passes through stokehold aluminium liquid chemical composition rapid analysis, the content through refining treatment with adjustment or control impurity element; After described filtration, the component of aluminium liquid and content thereof are consistent with component and the content thereof of final the obtained aluminium bar with particular state.
The present invention makes the aluminium bar with particular state by above-mentioned control casting and rolling mill practice, and described aluminium shank diameter is 8～12mm; Its main performance index: tensile strength is 70～110MPa; Percentage elongation is not less than 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
Secondly, the invention provides a kind of half duralumin single line and preparation method thereof.
A half duralumin single line, its cross section is circle, ladder type or Z-type; Its main performance index: tensile strength is 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
The preparation of half duralumin single line of the present invention, comprises the steps:
The aluminium bar of above-mentioned acquisition is carried out after drawing, without annealing operation or other subsequent handlings, directly obtain described half duralumin single line; Wherein, the drawing of described aluminium bar adopts big drawing machine to draw circle line, or adopts molded line wire drawing machine to draw molded line, and its drawing speed is controlled within the scope of 4～10m/s, and every time changes of section rate is controlled in 16～24% scopes.
The preparation of half duralumin single line of the present invention can directly obtain the aluminium single line conductor with semihard feature by controlling drawing process without annealing or other subsequent technique processes.
Again, the invention provides a kind of overhead power transmission conducting wire of being made as conductor material by described half duralumin single line.
An overhead power transmission conducting wire of being made as conductor material layer by described half duralumin single line, described overhead power transmission conducting wire comprises layer of support material and one or more layers stranded half duralumin single line conductor layer outside layer of support material.
One or more in the half duralumin single line that described half duralumin single line conductor layer is circle, ladder type or Z-type by cross section form.
Described layer of support material is galvanized steel wire, zinc-plated invar line, aluminium-clad steel wire, aluminium bag invar line, carbon fiber composite twisted wire or carbon fiber plug.
Described overhead power transmission conducting wire twists wire, gap-type conductor or expanded conductor with one heart for circle line twists wire, molded line with one heart.
Adopt half duralumin single line of the present invention and backing material combined, through stranding machine, can obtain the overhead power transmission conducting wire of any required cross section, desired structure.
Involved in the present invention to the equipment such as casting machine, tandem rolling unit, big drawing machine, molded line wire drawing machine be conventional equipment of the prior art.
The preparation technology of the aluminium bar of half hard state of the present invention and half duralumin single line conductor, its key technology is to control the casting of aluminium bar and the drawing process of rolling mill practice and aluminium bar, and preparation method of the present invention has the features such as flow process is short, simple to operate.Little and the stable performance of prepared half duralumin single line conductor electric energy loss; The overhead power transmission conducting wire of being made as conductor material by this half duralumin single line has the features such as energy-conservation and construction property is good.
Accompanying drawing explanation
Preparation technology's schematic flow sheet of Fig. 1 aluminium bar, half duralumin single line and overhead power transmission conducting wire
The cross sectional shape schematic diagram of Fig. 2 half duralumin single line
Fig. 3 overhead power transmission conducting wire structural representation
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention, should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.
Preparation technology's schematic flow sheet of aluminium bar as shown in Figure 1, half duralumin single line and overhead power transmission conducting wire, its main processes comprises aluminium ingot melting, casting, rolling, drawing, the operation such as stranded, concrete steps are as follows:
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Then aluminium liquid carries out refining in holding furnace, refining temperature is within the scope of 710～730 ℃, first adopt solid refined flux NaCl (NaCl addition is 8kg/t aluminium liquid) aluminium coating liquid surface to carry out refining treatment, adopt chlorine nitrogen mixture gas to be blown into (in described chlorine nitrogen mixture gas, the volumn concentration of chlorine is 20%) in aluminium liquid again and carry out refining treatment, then aluminium liquid is standing 50 minutes.The aluminium liquid flowing out from holding furnace is when through chute, adopt glass fiber mesh bag to filter that (after filtering, in aluminium liquid, major impurity element and weight percentage thereof are controlled and be: Si≤0.10%, Fe≤0.20%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%), then enter casting machine crystallizing wheel and carry out direct casting, the cast temperature of aluminium liquid is controlled at 680～710 ℃, crystallizing wheel rotating speed 2.5～3r/min, cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 1290mm
2, surface temperature control is within the scope of 450～500 ℃.Ingot casting directly enters three-roller type tandem rolling unit and is rolled and obtains aluminium bar, wherein, the operation of rolling adopts the rolling of band Minimal Tension, and adopts emulsion breaker roll to carry out Cooling and Lubricator, the finishing temperature of aluminium bar is controlled within the scope of 260～280 ℃, and after rolling, the diameter of aluminium bar is 9.5mm left and right.
The aluminium bar that the present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
Adopt 13 mould slidingtype big drawing machines to draw circle line on above-mentioned aluminium bar, drawing speed is controlled within the scope of 4～10m/s, and every time changes of section rate should be controlled in 16～24% scopes.In pulling process, adopt good lubricating fluid to be lubricated with cooling mould and drum, after drawing, can directly obtain cross section is circle and the aluminium single line with semihard feature, as shown in Fig. 2 (a).
The main performance index of half duralumin single line conductor of the present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
Adopt backing material by this aluminum steel conductor material and can form that round line twists with one heart, the molded line overhead power transmission conducting wire of the various structures form such as strand, gap-type conductor or expanded conductor with one heart.
Overhead power transmission conducting wire as shown in Fig. 3 (a), comprise stranded zinc-plated invar line layer of support material 2 and two-layer stranded half duralumin single line conductor layer 1 outside layer of support material, described half duralumin single line conductor layer is that circle and the aluminium single line with semihard feature form by the cross section of the present embodiment gained.Described overhead power transmission conducting wire is the circle line structure that tangles with one heart.
The overhead power transmission conducting wire that the present embodiment adopts half duralumin single line of the stable performance of gained to form as conductor material has stable performance, the feature that energy-conservation and construction property is good.
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Then aluminium liquid carries out refining in holding furnace, and refining temperature, within the scope of 710～730 ℃, first adopts solid refined flux CaF
2(CaF
2addition is 6kg/t aluminium liquid) aluminium coating liquid surface carries out refining treatment, then adopt chlorine nitrogen mixture gas to be blown into (in described chlorine nitrogen mixture gas, the volumn concentration of chlorine is 20%) in aluminium liquid to carry out refining treatment, then aluminium liquid is standing 50 minutes.The aluminium liquid flowing out from holding furnace is when through chute, adopt foam ceramic tile to filter that (after filtering, in aluminium liquid, major impurity element and weight percentage thereof are controlled and be: Si≤0.11%, Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%), then enter casting machine crystallizing wheel and carry out direct casting, the cast temperature of aluminium liquid is controlled at 680～710 ℃, it is 2.5～3r/min that crystallizing wheel rotating speed is controlled, and cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 1290mm
2, surface temperature control is within the scope of 450～500 ℃.Ingot casting directly enters three-roller type tandem rolling unit and is rolled and obtains aluminium bar, wherein, the operation of rolling adopts the rolling of band Minimal Tension, and adopts emulsion breaker roll to carry out Cooling and Lubricator, the finishing temperature of aluminium bar is controlled within the scope of 260～280 ℃, and after rolling, the diameter of aluminium bar is 9.5mm left and right.
The aluminium bar that the present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
Adopt non-sliding type molded line wire drawing machine to draw molded line on above-mentioned aluminium bar, drawing speed is controlled within the scope of 4～10m/s, and every time changes of section rate should be controlled in 16～24% scopes.In pulling process, adopt good lubricating fluid to be lubricated with cooling mould and drum, after drawing, can directly obtain cross section is ladder type and the aluminium single line with semihard feature, T-shaped as shown in Fig. 2 (b) and have the aluminium single line of semihard feature and have the aluminium single line of semihard feature.
The main performance index of half duralumin single line conductor of the present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
Overhead power transmission conducting wire as shown in Fig. 3 (b), comprise carbon fiber plug layer of support material 2 and two-layer stranded half duralumin single line conductor layer 3 outside layer of support material, described half duralumin single line conductor layer is that ladder type and the aluminium single line with semihard feature form by the cross section of the present embodiment gained.Described overhead power transmission conducting wire is the molded line structure that tangles with one heart.
The overhead power transmission conducting wire that the present embodiment adopts half duralumin single line of the stable performance of gained to form as conductor material has stable performance, the feature that energy-conservation and construction property is good.
Embodiment 3
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Then aluminium liquid carries out refining in holding furnace, refining temperature is within the scope of 710～730 ℃, (addition of NaCl is 3kg/t aluminium liquid first to adopt solid refined flux NaCl and KCl, the addition of KCl is 4kg/t aluminium liquid) aluminium coating liquid surface carries out refining treatment, adopt chlorine nitrogen mixture gas to be blown into (in described chlorine nitrogen mixture gas, the volumn concentration of chlorine is 20%) in aluminium liquid again and carry out refining treatment, then aluminium liquid is standing 40 minutes.The aluminium liquid flowing out from holding furnace is when through chute, adopt foam ceramic tile to filter that (after filtering, in aluminium liquid, major impurity element and weight percentage thereof are controlled and be: Si≤0.11%, Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%), then enter casting machine crystallizing wheel and carry out direct casting, the cast temperature of aluminium liquid is controlled at 680～710 ℃, it is 2.5～3r/min that crystallizing wheel rotating speed is controlled, and cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 1290mm
2, surface temperature control is within the scope of 450～500 ℃.Ingot casting directly enters three-roller type tandem rolling unit and is rolled and obtains aluminium bar, wherein, the operation of rolling adopts the rolling of band Minimal Tension, and adopts emulsion breaker roll to carry out Cooling and Lubricator, the finishing temperature of aluminium bar is controlled within the scope of 260～280 ℃, and after rolling, the diameter of aluminium bar is 9.5mm left and right.
The aluminium bar that the present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
Adopt non-sliding type molded line wire drawing machine to draw molded line on above-mentioned aluminium bar, drawing speed is controlled within the scope of 4～10m/s, and every time changes of section rate should be controlled in 16～24% scopes.In pulling process, adopt good lubricating fluid to be lubricated with cooling mould and drum, after drawing, can directly obtain cross section is Z-type and the aluminium single line with semihard feature, the Z-type as shown in Fig. 2 (c) and have the aluminium single line of semihard feature.
The main performance index of half duralumin single line conductor of the present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
The overhead power transmission conducting wire of the present embodiment, comprise stranded aluminium-clad steel wire layer of support material 6 and two-layer stranded half duralumin single line conductor layer 5 outside layer of support material, described half duralumin single line conductor layer is that Z-type and the aluminium single line with semihard feature form by the cross section of the present embodiment gained.Described overhead power transmission conducting wire is the molded line structure that tangles with one heart.
The overhead power transmission conducting wire that the present embodiment adopts half duralumin single line of the stable performance of gained to form as conductor material has stable performance, the feature that energy-conservation and construction property is good.
Embodiment 4
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Then aluminium liquid carries out refining in holding furnace, refining temperature is within the scope of 715～725 ℃, first adopt solid refined flux KCl (addition of KCl is 5kg/t aluminium liquid) aluminium coating liquid surface to carry out refining treatment, adopt chlorine nitrogen mixture gas to be blown into (in described chlorine nitrogen mixture gas, the volumn concentration of chlorine is 20%) in aluminium liquid again and carry out refining treatment, then aluminium liquid is standing 60 minutes.The aluminium liquid flowing out from holding furnace is when through chute, adopt glass fiber mesh bag to filter that (after filtering, in aluminium liquid, major impurity element and weight percentage thereof are controlled and be: Si≤0.11%, Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%), then enter casting machine crystallizing wheel and carry out direct casting, the cast temperature of aluminium liquid is controlled at 690～700 ℃, crystallizing wheel rotating speed 2.5r/min, cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 915mm
2, surface temperature control is within the scope of 470～490 ℃.Ingot casting directly enters three-roller type tandem rolling unit and is rolled and obtains aluminium bar, wherein, the operation of rolling adopts the rolling of band Minimal Tension, and adopts emulsion breaker roll to carry out Cooling and Lubricator, the finishing temperature of aluminium bar is controlled within the scope of 270～280 ℃, and after rolling, the diameter of aluminium bar is 8mm left and right.
The aluminium bar that the present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
Adopt 13 mould slidingtype big drawing machines to draw circle line on above-mentioned aluminium bar, drawing speed is controlled within the scope of 4～7m/s, and every time changes of section rate should be controlled in 16～20% scopes.In pulling process, adopt good lubricating fluid to be lubricated with cooling mould and drum, after drawing, can directly obtain cross section is circle and the aluminium single line with semihard feature, as shown in Fig. 2 (a).
The main performance index of half duralumin single line conductor of the present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
Embodiment 4 overhead power transmission conducting wire, comprise carbon fiber composite twisted wire layer of support material and three layers of stranded half duralumin single line conductor layer outside layer of support material, described half duralumin single line conductor layer is that circle and the aluminium single line with semihard feature form by the cross section of the present embodiment gained.Described overhead power transmission conducting wire is the circle line structure that tangles with one heart.
The overhead power transmission conducting wire that the present embodiment adopts half duralumin single line of the stable performance of gained to form as conductor material has stable performance, the feature that energy-conservation and construction property is good.
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Then aluminium liquid carries out refining in holding furnace, and refining temperature, within the scope of 715～725 ℃, first adopts solid refined flux AlF
6(AlF
6addition is 6kg/t aluminium liquid) aluminium coating liquid surface carries out refining treatment, then adopt chlorine nitrogen mixture gas to be blown into (in described chlorine nitrogen mixture gas, the volumn concentration of chlorine is 20%) in aluminium liquid to carry out refining treatment, then aluminium liquid is standing 50 minutes.The aluminium liquid flowing out from holding furnace is when through chute, adopt glass fiber mesh bag to filter that (after filtering, in aluminium liquid, major impurity element and weight percentage thereof are controlled and be: Si≤0.11%, Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%), then enter casting machine crystallizing wheel and carry out direct casting, the cast temperature of aluminium liquid is controlled at 690～700 ℃, crystallizing wheel rotating speed 3r/min, cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 2058mm
2, surface temperature control is within the scope of 450～480 ℃.Ingot casting directly enters three-roller type tandem rolling unit and is rolled and obtains aluminium bar, wherein, the operation of rolling adopts the rolling of band Minimal Tension, and adopts emulsion breaker roll to carry out Cooling and Lubricator, the finishing temperature of aluminium bar is controlled within the scope of 260～270 ℃, and after rolling, the diameter of aluminium bar is 12mm left and right.
The aluminium bar that the present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2/ m.
Adopt 13 mould slidingtype big drawing machines to draw circle line on above-mentioned aluminium bar, drawing speed is controlled within the scope of 7～10m/s, and every time changes of section rate should be controlled in 20～24% scopes.In pulling process, adopt good lubricating fluid to be lubricated with cooling mould and drum, after drawing, can directly obtain cross section is circle and the aluminium single line with semihard feature, as shown in Fig. 2 (a).
The main performance index of half duralumin single line conductor of the present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
The overhead power transmission conducting wire that the present embodiment adopts half duralumin single line of the stable performance of gained to form as conductor material has stable performance, the feature that energy-conservation and construction property is good.
Overhead power transmission conducting wire as shown in Fig. 3 (c), comprise stranded aluminium bag invar line layer of support material 6 and stranded half duralumin single line conductor layer 5 and stranded half duralumin single line conductor layer 7 outside half duralumin single line conductor layer 5 outside layer of support material, described half duralumin single line conductor layer 5 is that Z-type and the aluminium single line with semihard feature form by the cross section of embodiment 3 gained, and described half duralumin single line conductor layer 7 is that circle and the aluminium single line with semihard feature form by the cross section of embodiment 1 gained.Described overhead power transmission conducting wire is the hybrid architecture of the concentric strand of circle line and the concentric strand of molded line.
The overhead power transmission conducting wire that the present embodiment adopts half duralumin single line of the stable performance of gained to form as conductor material has stable performance, the feature that energy-conservation and construction property is good.
Above-described embodiment does not limit protection scope of the present invention; especially the overhead power transmission conducting wire consisting of half duralumin single line and backing material is not limited to the listed structure of embodiment; adopting the half duralumin single line of above-described embodiment is conductor material; and in conjunction with backing material; through stranding machine, can obtain the overhead power transmission conducting wire in any required cross section; comprise that round line twists with one heart wire, molded line and twists with one heart the structures such as wire, gap-type conductor or expanded conductor, any simple transformation of those skilled in the art and equivalent substitution are all within protection scope of the present invention.
Claims (6)
1. a half duralumin single line, is 8～12mm for adopting diameter; Tensile strength is 70～110MPa, and percentage elongation is not less than 15%; The DC resistivity of 20 ℃ is not more than 0.02765 Ω mm
2the aluminium bar of/m directly carries out drawing and makes; Described aluminium bar is for adopting the preparation method who comprises the steps to obtain:
1) aluminium ingot melting: obtain aluminium liquid after the weight percentage of aluminium is not less than to the fusing of 99.70% aluminium ingot, the aluminium liquid of acquisition is carried out to refining to adjust or to control the content of impurity in aluminium liquid in holding furnace; Wherein, refining temperature control is 710～730 ℃;
2) standing: the aluminium liquid of refining is standing;
3) aluminium liquid holding furnace being flowed out, when through chute, adopts glass fiber mesh bag or foam ceramic tile to filter;
4) the aluminium liquid after filtering enters casting machine crystallizing wheel and carries out direct casting and obtain ingot casting, wherein, it is 680～710 ℃ that the cast temperature of aluminium liquid is controlled, and crystallizing wheel rotating speed is 2.5～3r/min, cooling water pressure is not less than 0.3MPa, and surface temperature control is within the scope of 450～500 ℃;
5) ingot casting that step 4) obtains directly enters three-roller type tandem rolling unit and is rolled the described aluminium bar of acquisition, and wherein, the finishing temperature of described rolling is controlled within the scope of 260～280 ℃;
In step 1), during refining, first adopt solid refined flux NaCl, KCl, CaF
2and AlF
6in one or more aluminium coating liquid surfaces carry out refining treatment, then adopt chlorine nitrogen mixture gas to be blown in aluminium liquid, to carry out refining treatment; Step 2), in, the described standing time is 40～60 minutes;
In step 3), in the rear aluminium liquid of filtration, major impurity element and weight percentage thereof are controlled and are:
Si≤0.11%, Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%, and in aluminium liquid, the weight percentage control of aluminium is: Al >=99.7%.
2. half duralumin single line as claimed in claim 1, is characterized in that, the cross section of described half duralumin single line is circle, ladder type or Z-type; The tensile strength of described half duralumin single line is 100～140MPa; Percentage elongation is not less than 3%; The DC resistivity of 20 ℃ is not more than 0.02781 Ω mm
2/ m.
3. the preparation method of half duralumin single line as described in as arbitrary in claim 1-2-, comprises the steps: the aluminium bar described in claim 1 to carry out after drawing, without annealing operation or other subsequent handlings, directly obtains described half duralumin single line; Wherein, the drawing of described aluminium bar adopts big drawing machine to draw circle line, or adopts molded line wire drawing machine to draw molded line, and the drawing speed of described drawing is controlled within the scope of 4～10m/s, and every time changes of section rate is controlled in 16～24% scopes.
4. an overhead power transmission conducting wire, is made as conductor layer by the arbitrary half described duralumin single line of claim 1-2.
5. overhead power transmission conducting wire as claimed in claim 4, is characterized in that, comprises layer of support material and one or more layers stranded half duralumin single line conductor layer outside layer of support material; Described layer of support material is galvanized steel wire, zinc-plated invar line, aluminium-clad steel wire, aluminium bag invar line, carbon fiber composite twisted wire or carbon fiber plug; One or more in the half duralumin single line that described half duralumin single line conductor layer is circle, ladder type or Z-type by cross section form.
6. the overhead power transmission conducting wire as described in claim 4 or 5, is characterized in that, described overhead power transmission conducting wire twists wire, gap-type conductor or expanded conductor with one heart for circle line twists wire, molded line with one heart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110066229.1A CN102682872B (en) | 2011-03-18 | 2011-03-18 | Semihard aluminum wire, overhead wire and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110066229.1A CN102682872B (en) | 2011-03-18 | 2011-03-18 | Semihard aluminum wire, overhead wire and preparation method thereof |
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| CN102682872B true CN102682872B (en) | 2014-03-26 |
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| CN103305711B (en) * | 2013-07-13 | 2016-09-07 | 浙江亘古电缆股份有限公司 | Steel core high connductivity energy-saving wire production technology |
| CN104342587A (en) * | 2013-07-31 | 2015-02-11 | 沈阳阻燃电缆有限责任公司 | High-electric-conduction and energy-saving aluminum guide bar and its production technology |
| CN104264011B (en) * | 2014-09-30 | 2017-06-20 | 石家庄新日锌业有限公司 | A kind of aluminium wire |
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| CN105761833A (en) * | 2016-04-25 | 2016-07-13 | 国网山东省电力公司莒南县供电公司 | Diameter expansion lead |
| CN106363034B (en) * | 2016-08-26 | 2018-11-20 | 远东电缆有限公司 | A kind of highly conductive aluminium single line of intermediate state and its manufacturing method |
| CN110164618A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
| CN110164620A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
| CN110164619A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
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