CN101714431B - Process for manufacturing steel-cored aluminum strand for extra high voltage direct current transmission line - Google Patents
Process for manufacturing steel-cored aluminum strand for extra high voltage direct current transmission line Download PDFInfo
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- CN101714431B CN101714431B CN2009100546452A CN200910054645A CN101714431B CN 101714431 B CN101714431 B CN 101714431B CN 2009100546452 A CN2009100546452 A CN 2009100546452A CN 200910054645 A CN200910054645 A CN 200910054645A CN 101714431 B CN101714431 B CN 101714431B
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Abstract
The invention discloses a process for manufacturing a steel-cored aluminum strand for an extra high voltage direct current transmission line, which comprises the following steps of: a) stranding a steel wire core; b) standing an aluminum rod for more than 12 hours; c) drawing the aluminum rod, namely drawing the aluminum rod after the standing into an aluminum wire on a wire drawing machine, wherein a guide wheel and a guide device of the wire drawing machine are covered with a non-metal material to prevent the aluminum wire from directly contacting other iron components except a wire drawing roller; d) stranding the aluminum wire, namely on a stranding device, stranding the aluminum wire on the steel wire core, wherein a wire-through guide wheel and a threading sleeve of the stranding device are made of hard wear resistant plastics; and e) winding up the wires. According to the process, a special standing treatment is performed on the aluminum rod before drawing, and protective measures are adopted during the whole manufacturing process, so that the aluminum wire is prevented from directly contacting the iron components, and a conductor is ensured to be undamaged and be always in a smooth state; besides, a product has corona resistance, electromagnetic wave interference resistance, high compactness and large current-carrying capacity.
Description
Technical field
The present invention relates to a kind of manufacturing process of aerial condutor, be specifically related to the manufacturing process of a kind of heavy in section steel reinforced aluminium conductor.
Background technology
Ultra high voltage is the technology of transmission of electricity that a kind of ± 800kV direct current or 1000kV exchange, characteristics such as have remote, big capacity, low-loss transmits electric power and economize the land resource.The aerial condutor that is used for UHV transmission line not only requires the electric conductivity height, also will have anti-corona performance and anti-radio interference.Corona is because rough conductor produces uneven electric field, the electrode that radius of curvature is little around uneven electric field is all around when voltage is elevated to certain value, because free of air will discharge, form corona, thereby can increase loss and electromagnetic wave pollution.
Because traditional drawing strand system process using hard material is as guide wheel, sleeve pipe, guide and guards or the like, lead and the serious spin friction of traction wheel when also ignoring lead and crossing traction wheel, cause conductive line surfaces to cause certain damage therefrom, cause product that corona phenomenon easily takes place.Simultaneously, the standard of product such as the equal zero deflection requirement of tensile strength of ASTM B232, JIS C3110, DIN 48204, BS 2627 and 61089 pairs of aluminum steel monofilament of IEC at present, thereby can have influence on aluminum steel monofilament electric conductivity and mechanical performance.This technology is considered emphatically to improve the smoothness of conductive line surfaces and the tightness of lead, and aluminium monofilament tensile strength is carried out Deviation Control, improves conductor conductivity and anti-corona characteristic.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of manufacturing process that is used for the steel reinforced aluminium conductor of extra high voltage direct current transmission line, to overcome the above-mentioned defective of prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of manufacturing process of steel-cored aluminum strand for extra high voltage direct current transmission line may further comprise the steps: a) strand system steel wire core; B) the aluminium bar leaves standstill and handles more than 12 hours; C) aluminium bar drawing: the aluminium bar after will leaving standstill processing on the wire drawing machine is drawn into aluminum steel, all covers nonmetallic materials on the guide wheel of described wire drawing machine, the guide and guards, avoids aluminum steel directly to contact with other irony member except that fiberizing drum; D) aluminum steel strand system: on wire twisting equipment, with the aluminum steel strand on the steel wire core, described wire twisting equipment cross wire carrier and the threading cover all adopts the hard, wear-resistant plastics; E) take-up.
Preferably, the environmental condition that described aluminium bar leaves standstill processing is: relative humidity≤45%, temperature≤18 ℃.
Preferably, described wire drawing machine is the immersion High Speed Heavy-Duty Aluminium Wire Drawing.
Preferably, adopt the glomerocryst wire drawing die of high heat conduction on the described wire drawing machine.
Preferably, described wire drawing machine adopts low sliding ratio to join mould, sliding ratio τ=1.015-1.02.
Preferably, in described aluminium bar drawing process, adopt the non-hydrophily lubricating fluid of being furnished with extreme pressure agent.
Preferably, all wrapped polytetrafluoroethylplastic plastic band on the guide wheel of described wire drawing machine, the guide and guards.
Preferably, all wire carrier excessively and threading covers are nonmetallic materials on the described wire twisting equipment.
Further, the described wire carrier of crossing adopts the high strength hard wear-resistant plastic, is provided with screw thread hard, wear-resistant plastic tube in the penetration pipe, adopts bakelite doubling mould in the strand system process.
Preferably, the traction wheel surface on the described wire twisting equipment coats with protective materials.
Further, the protective materials on described traction wheel surface is a nonwoven fabrics.
Preferably, twisted pair wire equipment cleans before aluminum steel strand system, in the outlet blowing device is set, and prevents that aluminium bits and other bits end are stained with the aluminium stranded conductor surface.
Preferably, when take-up, isolate with protective materials between adjacent arbitrarily lead.
Further, described protective materials is a cable paper.
Preferably, in the described aluminum steel strand system process, laying tension keeps evenly, and tension force air pressure is 0.2-0.4Mpa.
Advantage of the present invention is: this technology is taked the special processing of leaving standstill to the aluminium bar before drawing, and takes safeguard measure in whole manufacturing process, avoids aluminum steel directly to contact with the irony member, guarantees the conductor not damaged and remains smooth state.Compare with traditional handicraft, the aluminium that the present invention produces is considered to be worth doing less and is little.Manufacturing process of the present invention improves the tightness of the smoothness and the lead of conductive line surfaces emphatically, tensile strength deviate to the aluminum steel monofilament is controlled, and produces conductance and reaches the 61.8%IACS steel reinforced aluminium conductor, and product has anti-corona and anti-electromagnetic wave interference, product tightness height, ampacity is big.
Embodiment
With a kind of ± cross section that the 800kV extra high voltage direct current transmission line is used is 900mm
2Steel reinforced aluminium conductor be example, manufacturing process of the present invention is described.
Implementation condition is the immersion High Speed Heavy-Duty Aluminium Wire Drawing, and the frame winch leaves standstill process chamber.
Described steel reinforced aluminium conductor comprises the galvanized strand wires core, and strand core twists the system aluminum steel outward.
The manufacture method of described steel reinforced aluminium conductor comprises the steps:
(1) the galvanized steel skein silk is made strand core.
(2) the aluminium bar adopts and leaves standstill processing before wire drawing.Environmental requirement: relative humidity is≤45%, temperature≤18 ℃, and the time is more than 12 hours.With this reliability and stability of guaranteeing the electric and mechanical performance of aluminium bar, make aluminum steel tensile strength deviate controlled.
(3) aluminium bar drawing.Aluminium bar after will leaving standstill processing on the wire drawing machine (immersion High Speed Heavy-Duty Aluminium Wire Drawing) is drawn into aluminum steel,
The drawing process main points:
A: all cover nonmetallic materials on the guide wheel of wire drawing machine, the guide and guards, avoid aluminum steel directly to contact with other irony member except that fiberizing drum;
B: adopt low sliding ratio to join mould, sliding ratio τ=1.015-1.02;
C: the glomerocryst wire drawing die that adopts high heat conduction.This glomerocryst mould and traditional wolfram steel wire drawing die are compared have better thermal conductivity (about more than 5 times), the more smooth textured surface and the resistance to wear of super-long-term with common glomerocryst mould.The heat that makes aluminum steel draw to be produced in deformation process is able to moment and distributes, thereby makes that the electric and physical property of aluminum steel is all guaranteed.
D: adopt the non-hydrophily aluminium wiredrawing lubricating liquid of being furnished with extreme pressure agent, extreme pressure agent plays the effect of isolating wire rod and die wall in the wire rod distortion.
(4) aluminum steel strand system.Go up the aluminum steel strand on the steel wire core at wire twisting equipment (frame winch).In this step, the abandoning tradition defective workmanship, carried out remarkable process modification:
A: the frame winch is all crosses wire carrier and the threading cover is nonmetallic materials, adopts the high strength hard wear-resistant plastic as crossing wire carrier, is provided with screw thread hard, wear-resistant plastic tube in the penetration pipe, adopts bakelite doubling mould in the strand system process.
B: frame winch traction wheel surface coats with protective materials.Twisted pair wire equipment cleans before aluminum steel strand system, increases blowing device (to remove the fricative aluminium bits of lead and doubling intermode, preventing that aluminium bits and other bits end are bonded on the aluminium stranded conductor surface) in outermost layer outlet zone.
C: in manufacture process, the tightness of lead is taked the multi-point average mode, and lead is measured and relatively, maximum ratio is no more than 0.5% when advancing into traction wheel by lower wall and behind the lower wall.
(5) take-up.Isolate with protective materials between arbitrarily adjacent lead during take-up, as cable paper.
Adopt manufacturing process of the present invention, can reduce the quantity and the size that produce the aluminium bits significantly, as shown in table 1.
Aluminium bits state contrast in table 1 technology of the present invention and the traditional handicraft drawing process
| Control the size (ton) | Aluminium bits state | Aluminium bits quantity is (kg) approximately | |
| The present invention | 100 | Fine and smooth dust | 0.07 |
| Traditional handicraft | 100 | Particle | 3.13 |
Manufacturing process embodiment of the present invention is as follows:
1, product specification:
JL/G3A-900/40-72/7
Steel (1+6) * Φ 2.66+ aluminium (9+15+21+27) * Φ 3.99
2, aluminium bar drawing, the technological process of aluminum steel strand system:
Adopt the aluminium bar to require: resistivity≤0.02775 Ω mm
2/ m, tensile strength 115-120Mpa, and require the aluminium bar by the direct refining of electrolytic aluminium liquid, the double glazing fabric screen is adopted in pot exit in the middle of the aluminium liquid, takes nitrogen spray formula refining agent.
Before drawing, the aluminium bar is left standstill processing, leave standstill environmental requirement: relative humidity 40%, 10 ℃ of temperature, time 24h.Carry out drawing after the aluminium bar leaves standstill, carry out non-anneal and draw Φ 3.99 aluminum steels on German Niehoff M85 immersion wire drawing machine, the drawing aluminum steel adopts high heat conduction glomerocryst mould.Design adopts low sliding ratio to join mould (τ=1.015-1.02), all wrapped polytetrafluoroethylplastic plastic band of all guide wheels, guide and guards on the wire drawing machine.After aluminum steel draws, outside twisting the steel core that makes, carry out expression of first degree strand system aluminum steel.Wringing equipment adopts JL K/630 type 91 dish frame winches, and speed 10m/min adopts pre twist, destressing device, crosses traction wheel and adopt the vertical packing of packing paper to put and each passage doubling mould during twisted wire.The reply stranding machine overhauls before the strand system, and laying tension should keep evenly suitably, and tension force air pressure is 0.2-0.4Mpa.Used threading cover internal configurations polytetrafluoroethylplastic plastic screwed pipe, destressing device guide wheel adopts poly-fluorine hard, wear-resistant plastics.Traction wheel is with the nonwoven fabric belts clad surface or install the wrapped machine of paper tape before traction wheel additional, rubs on traction wheel to prevent lead in order to wrapped paper tape.Adopt bakelite (etc. nonmetallic materials) doubling mould.The examination and test of products is carried out in the back take-up of strand system.
3, product detects
The testing result of projects is as shown in the table:
Table 2JL/G3A-900/40-72/7 main performance testing result
| Sequence number | Test event | Specification requirement | Assay |
| 1 | The lead corona | ||
| Surface roughness coefficient | ≥0.90 | (0.937 seeing Table 3) | |
| 2 | Radio interference test | ||
| Interference voltage (RIV) μ V | ≤1000 | Qualified (seeing Table 4) | |
| 3 | Tightness | ||
| The perimeter change rate | ≤2％ | 0.56％ | |
| 4 | Aluminum steel performance (strand back) | ||
| The tensile strength uniformity | ≤25 | 24.6 | |
| 5 | Dc resistivity Ω mm in the time of 20 ℃ 2/m | ≤0.028034 | 0.027941 |
| 6 | 70 ℃ of long-term ampacity A of conductor (35 ℃ of ring temperature) | 1080 | 1217 |
The surface roughness coefficient result of calculation of table 3 steel reinforced aluminium conductor JL/G3A-900/40-72/7
The test of table 4 steel reinforced aluminium conductor JL/G3A-900/40-72/7 radio interference voltage
The invention solves the problem of anti-corona of steel reinforced aluminium conductor and anti-radio interference, surface roughness coefficient reaches 0.941.Improved the aluminum steel conductance, ampacity is big, and its radio interference level is not more than 1000 microvolts, lead tightness height.According to the steel reinforced aluminium conductor that manufacturing process of the present invention is produced, the tensile strength deviate of aluminum steel monofilament is not more than 20MPa, and limiting value is no more than 25Mpa, and conductance reaches 61.8%IACS greater than 61.5%IACS.
Claims (6)
1. the manufacturing process of a steel-cored aluminum strand for extra high voltage direct current transmission line is characterized in that may further comprise the steps:
A) strand system steel wire core;
B) the aluminium bar leaves standstill and handles more than 12 hours, and the environmental condition that described aluminium bar leaves standstill processing is: relative humidity≤45%, temperature≤18 ℃;
C) aluminium bar drawing: the aluminium bar after will leaving standstill processing on the wire drawing machine is drawn into aluminum steel, all cover the polytetrafluoroethylplastic plastic band on the guide wheel of described wire drawing machine, the guide and guards, avoid aluminum steel directly to contact with other irony member except that fiberizing drum, adopt the glomerocryst wire drawing die of high heat conduction on the described wire drawing machine, adopt low sliding ratio to join mould, sliding ratio τ=1.015-1.02 adopts the non-hydrophily aluminium wiredrawing lubricating liquid of being furnished with extreme pressure agent in aluminium bar drawing process;
D) aluminum steel strand system: on wire twisting equipment, aluminum steel is twisted on the steel wire core, the wire carrier excessively and the threading cover of described wire twisting equipment all adopt the hard, wear-resistant plastics, wire carrier excessively and threading covers all on the wire twisting equipment are nonmetallic materials, cross wire carrier and adopt the high strength hard wear-resistant plastic, be provided with screw thread hard, wear-resistant plastic tube in the penetration pipe, adopt bakelite doubling mould in the strand system process, traction wheel surface on the wire twisting equipment coats with protective materials, twisted pair wire equipment cleans before aluminum steel strand system, in the outermost layer outlet blowing device is set, prevents that aluminium bits and other bits end are stained with the aluminium stranded conductor surface;
E) take-up when take-up, is isolated with protective materials between adjacent arbitrarily lead.
2. the manufacturing process of steel-cored aluminum strand for extra high voltage direct current transmission line according to claim 1, it is characterized in that: described wire drawing machine is the immersion High Speed Heavy-Duty Aluminium Wire Drawing.
3. the manufacturing process of steel-cored aluminum strand for extra high voltage direct current transmission line according to claim 1 is characterized in that: all wrapped polytetrafluoroethylplastic plastic band on the guide wheel of described wire drawing machine, the guide and guards.
4. the manufacturing process of steel-cored aluminum strand for extra high voltage direct current transmission line according to claim 1, it is characterized in that: the protective materials on described traction wheel surface is a nonwoven fabrics.
5. the manufacturing process of steel-cored aluminum strand for extra high voltage direct current transmission line according to claim 1, it is characterized in that: conductor spacing adjacent during take-up is a cable paper from the described protective materials of usefulness.
6. the manufacturing process of steel-cored aluminum strand for extra high voltage direct current transmission line according to claim 1 is characterized in that: in the described aluminum steel strand system process, laying tension keeps evenly, and tension force air pressure is 0.2-0.4Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100546452A CN101714431B (en) | 2009-07-10 | 2009-07-10 | Process for manufacturing steel-cored aluminum strand for extra high voltage direct current transmission line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100546452A CN101714431B (en) | 2009-07-10 | 2009-07-10 | Process for manufacturing steel-cored aluminum strand for extra high voltage direct current transmission line |
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| Publication Number | Publication Date |
|---|---|
| CN101714431A CN101714431A (en) | 2010-05-26 |
| CN101714431B true CN101714431B (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100546452A Expired - Fee Related CN101714431B (en) | 2009-07-10 | 2009-07-10 | Process for manufacturing steel-cored aluminum strand for extra high voltage direct current transmission line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578653A (en) * | 2013-10-28 | 2014-02-12 | 黄山市诚意金属有限公司 | Production method for long span aluminum clad steel stranded wires |
| CN113077943A (en) * | 2021-04-19 | 2021-07-06 | 江苏南瑞银龙电缆有限公司 | Preparation method of low-strength extremely-poor steel-cored aluminum strand |
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