CN204303435U - A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds - Google Patents
A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds Download PDFInfo
- Publication number
- CN204303435U CN204303435U CN201420786184.4U CN201420786184U CN204303435U CN 204303435 U CN204303435 U CN 204303435U CN 201420786184 U CN201420786184 U CN 201420786184U CN 204303435 U CN204303435 U CN 204303435U
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- cable
- conductor
- split
- share block
- insulation
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- 238000009413 insulation Methods 0.000 title claims abstract description 14
- 238000002955 isolation Methods 0.000 title claims abstract description 11
- 239000004020 conductor Substances 0.000 claims abstract description 68
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 229920000591 gum Polymers 0.000 claims abstract description 9
- 238000005253 cladding Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 23
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000004411 aluminium Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 230000001070 adhesive Effects 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 210000003491 Skin Anatomy 0.000 description 4
- 230000003247 decreasing Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Abstract
The utility model discloses a kind of split isolation volume enlarging high pressure power cable of the insulation that bonds, comprise cable outer layer and the cable core being located at cable outer layer center, described cable core is made up of multiple split share block, described split share block is made up of many copper conductors, described split share block is fan-shaped, multiple split share block forms a full circle and coated semiconductive band around cable center, is provided with insulating paper between described each split share block, described copper conductor outer cladding insulating sticky gum deposit.Large size conductor cable core is divided into a few part milliken conductors insulated from each other by the utility model, every root copper conductor before stranded applies one deck insulating sticky gum deposit, alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduce the loss heating of conductor, increase the ampacity of conductor, play energy-conservation effect.
Description
Technical field
The utility model relates to power cable technology.
Background technology
Superhigh pressure, Large Copacity transmit electric power both at home and abroad at present, adopt 1000mm more
2, 1200mm
2even more heavy in section is to 2500mm
2cable, when this kind of electric cable with large cross-section conductor runs, inside very easily produces eddy current, causes conductor temperature to rise, causes energy loss.This is the existence due to kelvin effect in AC system, the ampacity in conductor is caused to be not increase with cable conductor cross section and increase in direct ratio, but when conductor diameter increases to a certain degree, kelvin effect is serious, cause the alternating current effective resistance of conductor and AC resistance can obviously be greater than its D.C. resistance, thus depend merely on increasing section and also just lose its practicality and economy.Kelvin effect can produce eddy current in every root wire, and proximity effect also can produce eddy current in every root wire.Therefore, not only there is eddy current in every root wire under actual conditions, if do not insulate between wire, between wire, also can there is eddy current.Concerning cable line, the existence of kelvin effect and proximity effect increases making the AC resistance of cable core, thus the permission ampacity of cable is reduced, and namely cable wastes very most of conveying electric current.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of split isolation volume enlarging high pressure power cable of the insulation that bonds, alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduce the loss heating of conductor, increase the ampacity of conductor.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of split isolation volume enlarging high pressure power cable of the insulation that bonds, comprise cable outer layer and the cable core being located at cable outer layer center, described cable core is made up of multiple split share block, described split share block is made up of many copper conductors, described split share block is fan-shaped, multiple split share block forms a full circle and coated semiconductive band around cable center, insulating paper is provided with, described copper conductor outer cladding insulating sticky gum deposit between described each split share block.
Preferably, described fan-shaped split share block is provided with 5.
Preferably, described cable outer layer comprises semiconductive inner shield, insulating barrier, semiconductive external shield, semi-conductive buffer water-blocking band, aluminium sheath, asphalt corrosion resistant layer, oversheath, conductive layer laterally successively from center.
Preferably, the sectional area>=1000mm of described power cable
2.
The utility model is in order to alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduce the loss heating of conductor, increase the ampacity of conductor, several parts insulated from each other are divided into by large size conductor cable core namely to form milliken conductor, by selecting milliken conductor optimum structure, have selected and be conducive to 5 segmenting structures of constitutionally stable sector element by pretwist, this is most rock-steady structure.
In order to reduce the energy loss of heavy in section high-tension cable further, improve the ampacity of cable, in conductor structure, every root wire all insulate.Because super-section cable conductor is as adopted stranded compressing structure, the skin effect coefficient conducted electricity in transmission of electricity process will reach 54%; And according to milliken conductor structure (split isolation copper conductor), skin effect coefficient then can drop to 26%; If in milliken conductor structure, every root wire all insulate (insulation system of anti-eddy current concentration effect class), the electric heating loss of conductor is then decreased to 8%.Therefore the every root copper conductor before stranded applies one deck insulating sticky gum deposit, this adhesive glue adhesion strength is high, good toughness, after overcompaction is stranded, adhesive glue can not ftracture and come off, the method that fan-shaped pretwist conductor strand adopts layering and many rolls successively to press, the conductive surface that adhesive glue adheres to all the time can not come off and split.
Because root wire every in milliken conductor structure all insulate (insulation system of anti-eddy current concentration effect class), the electric heating loss of conductor is then decreased to 8%.Milliken conductor smooth surface rounding, alleviates the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduces the loss heating of conductor, increase the ampacity of conductor, play energy-conservation effect.
Pre-electric heating cable aluminium cover before cable aluminium cover outer coating asphalt corrosion resistant layer, can avoid the aluminium sleeving temperature because of high-tension cable too low and the phenomenon such as pitch caking, pitch holiday that causes.
Oversheath extrudes technological design and adopts double-layer coextrusion technology, and oversheath and conductive layer are extruded simultaneously.Owing to have employed double-layer coextrusion technology, conductive layer thickness is even, good with cable cover(ing) adhesive property, ensure that the reliability of oversheath DC break down voltage performance, and traditional technique conductive layer adopts equadag coating, easily come off when laying, pollute and produce and lay site environment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the utility model power cable section structure chart.
Embodiment
A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds, comprise cable outer layer and the cable core being located at cable outer layer center, described cable core is made up of multiple split share block, described split share block is made up of many copper conductors 1, described split share block is fan-shaped, and multiple split share block forms a full circle and coated semiconductive band 4 around cable center, is provided with insulating paper 3 between described each split share block, described copper conductor outer cladding insulating sticky gum deposit 2, the sectional area>=1000mm of this power cable
2.
Concrete, insulating paper adopts insulating crepe paper, and described fan-shaped split share block is provided with 5.Described cable outer layer comprises semiconductive inner shield 5, insulating barrier 6, semiconductive external shield 7, semi-conductive buffer water-blocking band 8, aluminium sheath 9, asphalt corrosion resistant layer 10, oversheath 11, conductive layer 12 laterally successively from center.
In order to alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reducing the loss heating of conductor, increasing the ampacity of conductor, large size conductor will be divided into several parts insulated from each other namely to form milliken conductor.The solution that the utility model adopts, by selecting milliken conductor optimum structure, reduce the energy loss of heavy in section high-tension cable further, improve the ampacity of cable, in conductor structure, every root wire all insulate.Because super-section cable conductor is as adopted stranded compressing structure, the skin effect coefficient conducted electricity in transmission of electricity process will reach 54%; And according to milliken conductor structure (split isolation copper conductor), skin effect coefficient then can drop to 26%.
If in milliken conductor structure, every root wire all insulate (insulation system of anti-eddy current concentration effect class), the electric heating loss of conductor is then decreased to 8%.Therefore when determining the structure of milliken conductor, the utility model have selected and is conducive to 5 segmenting structures of constitutionally stable sector element by pretwist, and this is the most rock-steady structure of the utility model design.For this reason, the every root copper conductor before stranded applies one deck insulating sticky gum deposit, and this adhesive glue adhesion strength is high, good toughness, and after overcompaction is stranded, adhesive glue can not ftracture and come off.Due to coating one deck insulating sticky gum deposit, in milliken conductor structure, every root wire all insulate (insulation system of anti-eddy current concentration effect class), and the electric heating loss of conductor is then decreased to 8%.Milliken conductor smooth surface rounding, alleviates the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduces the loss heating of conductor, increase the ampacity of conductor, play energy-conservation effect; The method that fan-shaped pretwist conductor strand adopts layering and many rolls successively to press, the conductive surface that adhesive glue adheres to all the time can not come off and split, insulation coat can be adapted at sulfuration 300 DEG C of high temperature consistency in crosslinked production process, can be applicable to the normal operating condition of cable the highest 90 DEG C time.
The cabling procedure of milliken conductor is identical with conventional large size conductor stranding mode, and technical process comprises the steps: that copper conductor connects and moves back wire drawing, and---------sector element is stranded, and---------drying room is degassed, and---buffer strip is wrapped, and------coating asphalt corrosion resistant layer---extrudes oversheath and conductive layer---and tests cross-linked three-layer co-extrusion milliken conductor stranding to extrude aluminium sheath for the coating of insulating sticky gum deposit and oven dry in wire cleaning.
In addition, preheating aluminium sheath before aluminium sheath applies asphalt corrosion resistant layer outward, can avoid the aluminium sleeving temperature because of high-tension cable too low and the phenomenon such as pitch caking, pitch holiday caused; Oversheath extrudes technological design and adopts double-layer coextrusion technology, oversheath and conductive layer are extruded simultaneously, conductive layer is made to extrude thickness even, good with cable cover(ing) adhesive property, ensure that the reliability of oversheath DC break down voltage performance, and traditional technique conductive layer adopts equadag coating, easily comes off when laying, pollute and produce and lay site environment, there is environment protecting.
Claims (3)
1. the split isolation volume enlarging high pressure power cable of the insulation that bonds, comprise cable outer layer and the cable core being located at cable outer layer center, described cable core is made up of multiple split share block, described split share block is made up of many copper conductors, it is characterized in that: described split share block is fan-shaped, multiple split share block forms a full circle and coated semiconductive band around cable center, is provided with insulating paper between described each split share block, described copper conductor outer cladding insulating sticky gum deposit.
2. the split isolation volume enlarging high pressure power cable of a kind of insulation that bonds according to claim 1, is characterized in that: described fan-shaped split share block is provided with 5.
3. the split isolation volume enlarging high pressure power cable of a kind of insulation that bonds according to claim 1, is characterized in that: the sectional area>=1000mm of described power cable
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786184.4U CN204303435U (en) | 2014-12-12 | 2014-12-12 | A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786184.4U CN204303435U (en) | 2014-12-12 | 2014-12-12 | A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204303435U true CN204303435U (en) | 2015-04-29 |
Family
ID=53108957
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|---|---|---|---|
| CN201420786184.4U Active CN204303435U (en) | 2014-12-12 | 2014-12-12 | A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds |
Country Status (1)
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| CN (1) | CN204303435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575824A (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | Fission isolation capacity-increasing high voltage power cable with high bonding insulation and manufacturing method |
-
2014
- 2014-12-12 CN CN201420786184.4U patent/CN204303435U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575824A (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | Fission isolation capacity-increasing high voltage power cable with high bonding insulation and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A high voltage power cable with bonded insulation and split isolation Effective date of registration: 20201203 Granted publication date: 20150429 Pledgee: Dushangang sub branch of Zhejiang Pinghu Rural Commercial Bank Co., Ltd Pledgor: ZHEJIANG CHENGUANG CABLE Co.,Ltd. Registration number: Y2020330001100 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210617 Granted publication date: 20150429 Pledgee: Dushangang sub branch of Zhejiang Pinghu Rural Commercial Bank Co., Ltd Pledgor: ZHEJIANG CHENGUANG CABLE Co.,Ltd. Registration number: Y2020330001100 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |