CN201877159U - High-conductivity and ultrahigh-strength 10kV overhead insulated cable - Google Patents
High-conductivity and ultrahigh-strength 10kV overhead insulated cable Download PDFInfo
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- CN201877159U CN201877159U CN2010206673680U CN201020667368U CN201877159U CN 201877159 U CN201877159 U CN 201877159U CN 2010206673680 U CN2010206673680 U CN 2010206673680U CN 201020667368 U CN201020667368 U CN 201020667368U CN 201877159 U CN201877159 U CN 201877159U
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- insulated cable
- est
- molded lines
- shaped steel
- high conductivity
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Abstract
The utility model relates to a high-conductivity and ultrahigh-strength 10kV overhead insulated cable, which is provided with an EST steel strand core, the EST steel strand core is wrapped by annealed aluminium wire layers, each annealed aluminium wire layer is formed by the way that a plurality of annealed aluminium wires are tightly and concentrically twisted in the form of an annular array, each annealed aluminium wire has a trapeziform cross section, the trapezoidal short sides are inward, and the annealed aluminium wire layers are wrapped by an insulating layer. The cable has the advantages of compact conductor structure, smooth surface, high electric conductivity, little loss and long service life.
Description
Technical field
The utility model relates to a kind of insulated cable of architecture advances, specifically, relates to a kind of high conductivity, the light-duty aerial insulated cable of superhigh intensity 10kV.
Background technology
Along with the develop rapidly of power distribution network, power supply area is covered by trees, and serious all multifactor influences such as burn into typhoon make the reliability of power distribution network face new difficulty.Aerial insulated cable is a kind of new profile and wire that grows up in the construction of 10kV power distribution network in recent years, it is compared with common built on stilts plain conductor, has the high advantage of cost performance, and price is again than underground cable considerably cheaper, therefore, in the 10kV power distribution network is built, progressively be that people are selected.Aerial insulated cable mainly contain following characteristics:
1), good insulation preformance: suspended insulated guide wire reduces the insulating requirements to the supporter of circuit because many layer insulatings than the superior insulation property of plain conductor, can reduce the circuit phase spacing, improves the feeder number of joint using circuit;
2), Corrosion Protection is good: suspended insulated guide wire is because skin has insulating barrier, and littler than the degree of the oxidated corrosion of plain conductor, resistance to corrosion is stronger, but the useful life of extension wire;
3), anti-outside destroy: reduce be subjected to trees, the influence of the external factors such as metal film and dust that fly to waft, reduce phase fault and ground fault.
Aerial insulated cable conductor wire core in the power distribution network circuit of prior art adopts conventional aluminium conductor, steel core aluminium conductor, copper conductor more.Conventional aluminium conductor aerial insulated cable poor electric conductivity, loss is big, and tensile strength is low, can not grow the built on stilts of distance and lay; Steel core aluminium conductor aerial insulated cable poor electric conductivity, loss is big; Copper conductor aerial insulated cable own wt is bigger, be doomed can not be greatly distance lay, and cost an arm and a leg.
Summary of the invention
The purpose of this utility model is at above-mentioned existing problems, a kind of conductor structure compactness, smooth surface are provided, conduct electricity very well, loss is few, the high conductivity of long service life, the light-duty aerial insulated cable of superhigh intensity 10kV.
The purpose of this utility model is achieved in that to have EST shaped steel twisted wire core, the coated outside of EST shaped steel twisted wire core has soft aluminium molded lines layer, soft aluminium molded lines layer is that trapezoidal, trapezoidal minor face is inside, the compact concentric stranding of the soft aluminium molded lines of annular array constitutes by many cross sections, and the outside of soft aluminium molded lines layer is coated with insulating barrier.
The utility model, conductor specification are 120/20 ~ 400/50mm
2
The utility model, EST shaped steel twisted wire core is by seven stranded forming of EST shaped steel line.
The utility model, the tensile strength 〉=1770MPa of EST shaped steel line, stress 〉=1550MPa during 1% elongation.
EST shaped steel twisted wire of the present utility model refers to prestress wire, and EST shaped steel line refers to the prestressing force steel wire.
The utility model, soft aluminium molded lines layer has two-layer or three layers.
The utility model, the conductance 〉=63%IACS of soft aluminium molded lines, tensile strength is 60～95MPa, percentage elongation 〉=25%.
The utility model, the material of insulating barrier are a kind of of crosslinked polyethylene or high density polyethylene (HDPE).
The utility model, the nominal thickness of insulating barrier are 2.5mm.
The utility model has the following advantages:
1), high conductivity: conductor adopts conductance can reach the soft aluminium molded lines of 63%IACS, compares with common hard-drawn aluminium wire conductance 61%IACS, and conductance has improved 3.3%, compares with the conventional aluminium conductor of same cross-sectional, can reduce line loss 6%;
2), superhigh intensity: aluminium conductor adopts EST shaped steel twisted wire strengthening core, EST shaped steel twisted wire is made up of EST shaped steel line, EST shaped steel line tensile strength 〉=1770MPa, stress 〉=1550MPa during 1% elongation, with common steel wire tensile strength 〉=1340MPa, stress 〉=1310MPa compares during 1% elongation, intensity increases substantially, this kind aerial insulated cable can lay by the built on stilts of farther distance, increases the distance between the tower bar, has reduced the power transmission and transformation line construction cost;
3), economical with materials: because the conductor structure compactness, the gap between the aluminum steel thigh is little, and conductor filled coefficient height is compared external diameter with the common steel core aluminium conductor of same cross-sectional and obviously reduced, saving shielding material and Insulation Material that can be a large amount of;
4), long service life:, can reduce the partial discharge of aerial insulated cable, longer service life owing to conductor structure compactness, smooth surface.
The utility model has conductor structure compactness, smooth surface, conducts electricity very well, loss is few, the advantage of long service life.
Following embodiment is further described the utility model in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 of the present utility model;
Fig. 2 is the structural representation of embodiment 2 of the present utility model.
Among the figure, 1, EST shaped steel twisted wire core; 2, soft aluminium molded lines layer; 3, insulating barrier.
Embodiment
With reference to Fig. 1, present embodiment 1 is a kind of high conductivity, the light-duty aerial insulated cable of superhigh intensity 10kV, the coated outside of EST shaped steel twisted wire core 1 has two-layer soft aluminium molded lines layer 2, EST shaped steel twisted wire core 1 is by seven stranded forming of EST shaped steel line, tensile strength 〉=the 1770MPa of EST shaped steel line, stress 〉=1550MPa during 1% elongation, soft aluminium molded lines layer 2 is trapezoidal by many cross sections, trapezoidal minor face is inside, the compact concentric stranding of the soft aluminium molded lines of annular array constitutes, and it is the weather resistant crosslinked polyethylene of 2.5mm or a kind of insulating barrier 3 of weather resistant high density polyethylene (HDPE) that the outside of soft aluminium molded lines layer 2 is coated with nominal thickness; Conductance 〉=the 63%IACS of soft aluminium molded lines, tensile strength is 60～95MPa, percentage elongation 〉=25%.
With reference to Fig. 2, present embodiment 2 is a kind of high conductivity, the light-duty aerial insulated cable of superhigh intensity 10kV, the coated outside of EST shaped steel twisted wire core 1 has three layers of soft aluminium molded lines layer 2, EST shaped steel twisted wire core 1 is by seven stranded forming of EST shaped steel line, tensile strength 〉=the 1770MPa of EST shaped steel line, stress 〉=1550MPa during 1% elongation, soft aluminium molded lines layer 2 is trapezoidal by many cross sections, trapezoidal minor face is inside, the compact concentric stranding of the soft aluminium molded lines of annular array constitutes, and it is the weather resistant crosslinked polyethylene of 2.5mm or a kind of insulating barrier 3 of weather resistant high density polyethylene (HDPE) that the outside of soft aluminium molded lines layer 2 is coated with nominal thickness; Conductance 〉=the 63%IACS of soft aluminium molded lines, tensile strength is 60～95MPa, percentage elongation 〉=25%.
Manufacture method of the present utility model may further comprise the steps:
One, employing meets the A4 serial model No. round aluminum rod of GB/T3954-2008 standard, on the big wire drawing machine of LHD-450/13 type aluminium, draw, totally 7～9 times, in the pulling process, the wire-drawing die of front adopts conventional typical circular cross section wire drawing die, road second from the bottom and the 3rd road wire-drawing die adopt oval wire drawing die, last one stock mould adopts cross section such as trapezoidal forming wire drawing die drawing system, make trapezoidal duralumin single line, the stock mould sectional dimension is by each specification finished product lead technological requirement control, typical circular mould wire drawing lengthening coefficient is controlled at below 1.35, oval and last trapezoidal shaper lengthening coefficient together is controlled at below 1.30, and the wire drawing linear velocity is controlled at below the 15m/s;
Two, trapezoidal duralumin molded lines softening annealing is handled, the programming rate that is no more than 10 ℃ with per minute heats up, and temperature is 370 ℃～400 ℃ annealing, after 150 minutes time, naturally cools to ambient temperature, obtains the trapezoidal soft aluminium molded lines of high conductivity;
Three, adopting suitable stranding machine, is the axle center with EST shaped steel twisted wire, the two-layer or three layers of soft aluminium molded lines of its peripheral concentric stranding.In the stranded process of conductor wire core, the internal layer lay ratio is greater than outer lay ratio, adjacent layer strand is on the contrary, outermost layer strand is to being left-hand, and between 16～22 times of the stranded lay ratios of EST shaped steel twisted wire, the stranded lay ratio internal layer of soft aluminium molded lines is between 10～16 times, outer between 10～14 times, adopt the nano diamond coating diamond mould as the doubling mould, guarantee stranded closely, any surface finish;
Four, be extruded with insulating barrier equably on the soft aluminium molded lines skin, material is a kind of of weather resistant crosslinked polyethylene or weather resistant high density polyethylene (HDPE), nominal thickness is 2.5mm, when adopting insulating layer material to be the weather resistant crosslinked polyethylene, should carry out steam or poach crosslinked, crosslinked poly-second heat extends 〉=175%.
With 400/50 specification is example, selects the A4 type Φ 9.5mm round aluminum rod that meets the GB/T3954-2008 standard for use, and aluminium bar tensile strength is 95MPa, and resistivity was 27.86 n Ω m when percentage elongation was 12%, 20 ℃.
1), drawing nominal cross is 9.21mm
210 of trapezoidal duralumin molded lines, the wire drawing linear velocity is controlled at 10m/min, adopt 8 road moulds to draw altogether, front 5 road moulds adopt typical circular cross section wire drawing die, the wire drawing lengthening coefficient is controlled between the per pass 1.30～1.35,6th, 7 road moulds adopt the elliptic cross-section wire drawing die, and the wire drawing lengthening coefficient is controlled at 1.28,1.25 respectively, and mould is similar to sectional area 14.03mm
2, 11.22mm
2, the 8th road mould is trapezoidal wire drawing die, and the wire drawing lengthening coefficient is controlled at 1.20, considers that wire drawing is extended and strand system process can make the aluminum steel cross section reduce, and the 8th road mould effective cross-section is bigger by 1.5% than the actual monofilament cross section that requires, and selecting to calculate the cross section is 9.35mm
2Trapezoidal wire drawing die to be drawn into nominal cross be 9.21mm
2Trapezoidal duralumin molded lines.
2), drawing nominal cross is 9.00mm
215 of trapezoidal duralumin molded lines, the wire drawing linear velocity is controlled at 10m/min, adopt 8 road moulds to draw altogether, front 5 road moulds adopt typical circular cross section wire drawing die, the wire drawing lengthening coefficient is controlled between the per pass 1.30～1.35,6th, 7 road moulds adopt the elliptic cross-section wire drawing die, and the wire drawing lengthening coefficient is controlled at 1.28,1.25 respectively, and mould is similar to sectional area 13.71mm
2, 10.97mm
2, the 8th road mould is trapezoidal wire drawing die, and the wire drawing lengthening coefficient is controlled at 1.20, considers that wire drawing is extended and strand system process can make the aluminum steel cross section reduce, and the 8th road mould effective cross-section is bigger by 1.5% than the actual monofilament cross section that requires, and selecting to calculate the cross section is 9.14mm
2Trapezoidal wire drawing die to be drawn into nominal cross be 9.00mm
2Trapezoidal duralumin molded lines.
3), drawing nominal cross is 9.76mm
218 of trapezoidal duralumin molded lines, the wire drawing linear velocity is controlled at 10m/min, adopt 8 road moulds to draw altogether, front 5 road moulds adopt typical circular cross section wire drawing die, the wire drawing lengthening coefficient is controlled between the per pass 1.30～1.35,6th, 7 road moulds adopt the elliptic cross-section wire drawing die, and the wire drawing lengthening coefficient is controlled at 1.28,1.25 respectively, and mould is similar to sectional area 14.86mm
2, 11.89mm
2, the 8th road mould is trapezoidal wire drawing die, and the wire drawing lengthening coefficient is controlled at 1.20, considers that wire drawing is extended and strand system process can make the aluminum steel cross section reduce, and the 8th road mould effective cross-section is bigger by 1.5% than the actual monofilament cross section that requires, and selecting to calculate the cross section is 9.91mm
2Trapezoidal wire drawing die to be drawn into nominal cross be 9.76mm
2Trapezoidal duralumin molded lines.Trapezoidal duralumin single line after drawing is put into annealing furnace carry out the softening annealing processing, 7 ℃ of programming rate per minutes, annealing temperature is 380 ℃, heat treatment time is 150 minutes, natural cooling obtained the trapezoidal soft aluminium molded lines of high conductivity in 24 hours after ambient temperature, with 7 diameters EST shaped steel twisted wire that is 3.07mm as heart yearn, soft aluminium molded lines internal layer is 10, and nominal cross is 9.21mm
2Trapezoidal soft aluminium molded lines, stranded lay ratio internal layer is controlled at 15.5 times, and adjacent skin is that 15 nominal crosss are 9.00mm
2Trapezoidal soft aluminium molded lines, stranded lay ratio internal layer is controlled at 15 times, and skin is that 18 nominal crosss are 9.76mm
2Trapezoidal soft aluminium molded lines, stranded lay ratio internal layer is controlled at 13 times, carry out concentric stranding, each section of frame type stranding machine strand cage all is furnished with anti-soft aluminium molded lines equipment for supporting patient with burn, produce in the stranded process, adopt the aperture be 25.1mm nano diamond coating diamond mould as the doubling mould, guarantee that conductive line surfaces is bright and clean, tight.The high conductivity of making, the soft aluminium molded lines of the light-duty aerial insulated cable conductor of superhigh intensity 10kV resistivity mean value are 27.237n Ω m, conductance is 63.3%IACS, with the common duralumin of 61%IACS mutually specific conductivity improved 3.8%, measuring tensile strength mean value is 87MPa, percentage elongation 27%.Insulating barrier adopts 120 plastic extruding machines, and insulating barrier adopts the weather resistant cross-linking polyethylene materials to extrude, and extrusion temperature is controlled at 160 ℃～215 ℃.Its THICKNESS CONTROL is at 2.5～2.58mm.Prevent that when insulation extrudes the cable two ends to be sealed after finishing moisture from entering conductor, should put into and steam the room and carry out vapor crosslinking putting in order the dish cable after sealing is finished that temperature is 90 ℃, insulation is no less than 9 hours.
The utility model more meets and builds into conservation-minded society's developing direction, has a extensive future.
Claims (7)
1. a high conductivity, the light-duty aerial insulated cable of superhigh intensity 10kV, has EST shaped steel twisted wire core (1), it is characterized in that: the coated outside of described EST shaped steel twisted wire core (1) has soft aluminium molded lines layer (2), described soft aluminium molded lines layer (2) is that trapezoidal, trapezoidal minor face is inside, the compact concentric stranding of the soft aluminium molded lines of annular array constitutes by many cross sections, and the outside of described soft aluminium molded lines layer (2) is coated with insulating barrier (3).
2. high conductivity according to claim 1, the light-duty aerial insulated cable of superhigh intensity 10kV is characterized in that: the material of described insulating barrier (3) is a kind of of weather resistant crosslinked polyethylene or weather resistant high density polyethylene (HDPE).
3. high conductivity according to claim 2, the light-duty aerial insulated cable of superhigh intensity 10kV is characterized in that: described soft aluminium molded lines layer (2) has two-layer or three layers.
4. high conductivity according to claim 3, the light-duty aerial insulated cable of superhigh intensity 10kV is characterized in that: the conductance 〉=63%IACS of described soft aluminium molded lines, tensile strength is 60～95 MPa, percentage elongation 〉=25%.
5. high conductivity according to claim 4, the light-duty aerial insulated cable of superhigh intensity 10kV is characterized in that: described EST shaped steel twisted wire core (1) is by seven stranded forming of EST shaped steel line.
6. high conductivity according to claim 5, the light-duty aerial insulated cable of superhigh intensity 10kV is characterized in that: the tensile strength 〉=1770MPa of described EST shaped steel line, stress 〉=1550 MPa during 1% elongation.
7. high conductivity according to claim 6, the light-duty aerial insulated cable of superhigh intensity 10kV is characterized in that: the nominal thickness of described insulating barrier (3) is 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206673680U CN201877159U (en) | 2010-12-17 | 2010-12-17 | High-conductivity and ultrahigh-strength 10kV overhead insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206673680U CN201877159U (en) | 2010-12-17 | 2010-12-17 | High-conductivity and ultrahigh-strength 10kV overhead insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877159U true CN201877159U (en) | 2011-06-22 |
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ID=44165072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206673680U Expired - Fee Related CN201877159U (en) | 2010-12-17 | 2010-12-17 | High-conductivity and ultrahigh-strength 10kV overhead insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877159U (en) |
-
2010
- 2010-12-17 CN CN2010206673680U patent/CN201877159U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20171217 |