CN202230796U - Large sectional area power cable of radial layered stranded conductor - Google Patents
Large sectional area power cable of radial layered stranded conductor Download PDFInfo
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- CN202230796U CN202230796U CN 201120284736 CN201120284736U CN202230796U CN 202230796 U CN202230796 U CN 202230796U CN 201120284736 CN201120284736 CN 201120284736 CN 201120284736 U CN201120284736 U CN 201120284736U CN 202230796 U CN202230796 U CN 202230796U
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- power cable
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Abstract
The utility model relates to a large sectional area power cable of a radial layered stranded conductor, comprising conductors having circular cross sections. The conductors are divided into inner and outer two layers along a radius direction, the outer layer conductor is an outer-ring conductor, and the inner layer is a center conductor; a first insulating layer is arranged between the outer-ring conductor and the center conductor, the center conductor is formed by stranding a plurality of sector elements, a second insulating layer is arranged between two adjacent sector elements, and the outer ring conductor is formed by stranding a plurality of sector annular elements; a third insulating layer is arranged between the adjacent two sector annular elements, each sector element and each sector annular element are both composed of a plurality of metal single wires. The large sectional area power cable of the radial layered stranded conductor of the utility model enables the current density at the middle parts of the conductors to be improved by adding the first insulating layer, and enables the current-carrying capacity of the power cable to be improved under the situation of not adding conductors, thereby saving conductor materials.
Description
Technical field
The utility model relates to a kind of power cable, and power cable is amassed in particularly a kind of heavy in section of radially layered stranded conductor.
Background technology
Power cable generally is made up of copper conductor core, insulating barrier, metallic sheath, sheath and serving.The conductor of power cable is generally stranded copper single line and constitutes, and is bearing logical current-carrying Core Feature, when its conductor dbus is crossed alternating current, influenced by kelvin effect, and the electric current distribution of conductor is also inhomogeneous.Along with the increase of cross-sectional area of conductor, the effect that current density increases from inside to outside gradually is remarkable gradually, and the average current density on the conductor unit area reduces gradually, and the conductor utilance progressively descends, and its AC resistance increases gradually.China utility model CN2598104Y discloses a kind of heavy in section copper core five milliken conductors, is divided into five thigh pieces that are separated from each other to copper core cross section, and each strand interblock is provided with insulation crimped paper.China utility model CN101620898A discloses a kind of production method of crosslinked polyethylene insulating power cable for ultra-high voltage aluminum core segmental conductor, obtains the power cable that is formed by five strands of aluminium core thigh piece twists through this method.Because the kelvin effect of cable conductor, the electric current distribution of per share conductor are in its periphery, the current density of the middle part of per share conductor is just very little, has reduced the ampacity of conductor.China utility model CN201408562Y discloses a kind of milliken conductor and copper single line; Form one deck CuO film on every copper single line surface; Make every copper single line as a milliken conductor, reduce kelvin effect, but its complex manufacturing; Production efficiency is low, is not suitable for the long-pending power cable in heavy in section.
The utility model content
The utility model problem to be solved provides a kind of long-pending power cable in heavy in section of radially layered stranded conductor, overcomes the problems referred to above that exist in the prior art.
Power cable is amassed in the heavy in section of the utility model radially layered stranded conductor; The conductor that comprises circular cross-section, said conductor is divided into inside and outside two-layer along radial direction, and skin is the outer shroud conductor; Internal layer is a center conductor; First insulating barrier is set between outer shroud conductor and center conductor, and fan-shaped strand piece is stranded forms by a plurality of for said center conductor, between adjacent two fan-shaped strand of pieces second insulating barrier is set; Strand piece is stranded forms by a plurality of fans annular for said outer shroud conductor, between adjacent two fan annular strand pieces the 3rd insulating barrier is set, and each fan-shaped strand of piece constitutes by many metal single lines with each fan annular strand piece.
Said second insulating barrier of the utility model and the 3rd insulating barrier are insulation crimped paper.
The quantity of the said fan annular of the utility model strand piece equates with the quantity of fan-shaped strand of piece.
The quantity of the said fan annular of the utility model strand piece is the twice of fan-shaped strand of number of blocks.
Said first insulating barrier of the utility model is arranged on the midpoint of said conductor radius, and the external diameter that makes said outer shroud conductor is the twice of center conductor external diameter.
Said first insulating barrier of the utility model is a plastic insulating layer.
The outside of the said conductor of the utility model also is provided with semi-conductive layer, insulating barrier, semiconductive shielding layer, resilient coating, metallic sheath and serving successively.
Through above technical scheme, power cable is amassed in the heavy in section of the radially layered stranded conductor of the utility model, through in conductor, adding one deck first insulating barrier; Under the situation that does not increase cross-sectional area of conductor, improved the average current density of conductor middle part, reduced the AC resistance of conductor greatly; Improve the current capacity of cable conductor, and when processing, simplified the production technology of conductor, improved production efficiency; In cable joint place and end, better operate.In the past; In order to improve the ampacity of cable, can only reach this purpose by the sectional area that increases cable conductor, the utility model just can improve its ampacity under the sectional area that does not increase cable conductor; A large amount of conductors have so just been saved; Not only reduce the cost of cable, but also practiced thrift fossil energy sources, reduce CO2 emission, supported low carbon development.
Description of drawings
The concrete structure figure of Fig. 1 the utility model first embodiment.
The concrete structure figure of Fig. 2 the utility model second embodiment.
Embodiment
Like Fig. 1 and shown in Figure 2, power cable is amassed in the heavy in section of radially layered stranded conductor, comprises the conductor 1 of circular cross-section; Conductor is divided into inside and outside two-layer along radial direction; Skin is the outer shroud conductor, and internal layer is a center conductor, and first insulating barrier 3 is set between outer shroud conductor and center conductor; Fan-shaped strand piece is stranded forms by a plurality of for center conductor, between adjacent two fan-shaped strand of pieces second insulating barrier is set; Strand piece is stranded forms by a plurality of fans annular for the outer shroud conductor, between adjacent two fan annular strand pieces the 3rd insulating barrier is set, and each fan-shaped strand of piece constitutes by many metal single lines with each fan annular strand piece.Only need to be divided into conductor two-layer through first insulating barrier; Every layer is divided into multiply again, per share by many stranded the forming of metal single line, but every single line outer surface of adjacent metal single line conducting need not insulation setting; Just can reduce the influence of kelvin effect to conductor; Improve the average current density of conductor middle part, reduced the AC resistance of conductor greatly, improved the current capacity of cable conductor; Constitute conductor through layering and simplified production technology, improved production efficiency, be specially adapted to the long-pending power cable in heavy in section.
Be illustrated in figure 1 as a specific embodiment of the long-pending power cable in heavy in section of the utility model radially layered stranded conductor, this power cable is respectively conductor 1, semi-conductive layer 4, insulating barrier 5, semiconductive shielding layer 6, resilient coating 7, metallic sheath 8 and serving 9 from inside to outside.The quantity of fan-shaped strand of piece of the quantity of outer shroud conductor fan annular strand piece and center conductor equates (see figure 1), and second insulating barrier and the 3rd insulating barrier are the crimped paper 2 that insulate.This moment, conductor was divided into ten little conductor thigh pieces, had improved the current density of conductor middle part, had reduced the AC resistance of conductor, under the situation that does not increase conductor, had improved the ampacity of power cable.And when processing; Produce fan-shaped strand of piece of center conductor earlier; Because its cross section is easier to produce for a short time, stranded formation center conductor after five fan-shaped strand of pieces are accomplished respectively, again first insulating barrier 3 first outside center conductor; Around after be stranded in the periphery of first insulating barrier producing good fan annular strand piece again, form the conductor of power cable with this.Because reduced the sectional area of each strand piece, therefore improved the production efficiency of each strand piece and be prone to satisfy technical indicator.The slyness property of having strengthened power cable conductor through twice stranded production has improved the current-carrying performance of conductor, and has simplified the production technology of the long-pending cable conductor in heavy in section, makes at cable joint place and end and better operates.
Be illustrated in figure 2 as another specific embodiment of the long-pending power cable in heavy in section of the utility model radially layered stranded conductor, the quantity of fan annular strand piece is the twice of fan-shaped strand of number of blocks.Cable conductor is at first processed center conductor when moulding, the stranded sector conductor that is pressed into of circular copper single line, five sector conductors are twisted into center conductor more then, between adjacent two strands of fan-shaped strand of pieces, is provided with second insulating barrier; Add one deck first insulating barrier 3 once more in the center conductor periphery of processing, at the fan annular strand piece of its stranded moulding in outside, between fan annular strand piece, be provided with the 3rd insulating barrier then, second insulating barrier and the 3rd insulating barrier generally adopt insulation crimped paper 2.Owing between center conductor and outer shroud conductor, added first insulating barrier, the thigh piece number of outer shroud conductor can double, and therefore under the situation that does not increase conductor, has improved the ampacity ability of cable conductor more, has saved conductor material.
For the ampacity that makes power cable reaches the maximum carrying capacity with the cross section; Be arranged on first insulating barrier 3 midpoint of conductor radius; Making the external diameter of outer shroud conductor is the twice of center conductor external diameter, has realized under the situation of minimum layering, also can reach maximum anti-kelvin effect; Make power cable reach maximum carrying capacity, and simplified production technology.
First insulating barrier 3 is preferably plastic insulating layer, and plastic insulation and insulating paper are compared, and has very high intensity, and its tearing toughness is 300%, and the tearing toughness of insulating paper is about 30%, thereby has reduced the possibility of damage in insulation; And on technology; Plastic insulation can adopt full back twist technology; And insulating paper can not adopt this full back twist technology because itself if be used for that this technology can be destroyed the effect that loses insulation, and the benefit of this technology makes cable conductor rounding more exactly, has improved the performance of power cable.
Claims (7)
1. power cable is amassed in the heavy in section of a radially layered stranded conductor, comprises the conductor (1) of circular cross-section, it is characterized in that; Said conductor (1) is divided into inside and outside two-layer along radial direction; Skin is the outer shroud conductor, and internal layer is a center conductor, and first insulating barrier (3) is set between outer shroud conductor and center conductor; Fan-shaped strand piece is stranded forms by a plurality of for said center conductor, between adjacent two fan-shaped strand of pieces second insulating barrier is set; Strand piece is stranded forms by a plurality of fans annular for said outer shroud conductor, between adjacent two fan annular strand pieces the 3rd insulating barrier is set, and each fan-shaped strand of piece constitutes by many metal single lines with each fan annular strand piece.
2. power cable is amassed in heavy in section according to claim 1, it is characterized in that, said second insulating barrier and the 3rd insulating barrier are insulation crimped paper (2).
3. power cable is amassed in heavy in section according to claim 1, it is characterized in that, the quantity of said fan annular strand piece equates with the quantity of fan-shaped strand of piece.
4. power cable is amassed in heavy in section according to claim 1, it is characterized in that, the quantity of said fan annular strand piece is the twice of fan-shaped strand of number of blocks.
5. power cable is amassed in heavy in section according to claim 1, it is characterized in that, said first insulating barrier (3) is arranged on the midpoint of said conductor radius, and the external diameter that makes said outer shroud conductor is the twice of center conductor external diameter.
6. power cable is amassed in heavy in section according to claim 1, it is characterized in that, said first insulating barrier (3) is a plastic insulating layer.
7. power cable is amassed in heavy in section according to claim 1, it is characterized in that, the outside of said conductor also is provided with semi-conductive layer (4), insulating barrier (5), semiconductive shielding layer (6), resilient coating (7), metallic sheath (8) and serving (9) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120284736 CN202230796U (en) | 2011-08-05 | 2011-08-05 | Large sectional area power cable of radial layered stranded conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120284736 CN202230796U (en) | 2011-08-05 | 2011-08-05 | Large sectional area power cable of radial layered stranded conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202230796U true CN202230796U (en) | 2012-05-23 |
Family
ID=46081375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120284736 Expired - Lifetime CN202230796U (en) | 2011-08-05 | 2011-08-05 | Large sectional area power cable of radial layered stranded conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202230796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915809A (en) * | 2011-08-05 | 2013-02-06 | 上海电缆研究所 | Large sectional area power cable of radially layered stranded conductor |
-
2011
- 2011-08-05 CN CN 201120284736 patent/CN202230796U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915809A (en) * | 2011-08-05 | 2013-02-06 | 上海电缆研究所 | Large sectional area power cable of radially layered stranded conductor |
| CN102915809B (en) * | 2011-08-05 | 2015-09-30 | 上海电缆研究所 | Power cable is amassed in the heavy in section of radially layered stranded conductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |
|
| CX01 | Expiry of patent term |