CN203038684U - Aluminium tube type cable used for conductor crosslinked polyethylene insulation winding - Google Patents
Aluminium tube type cable used for conductor crosslinked polyethylene insulation winding Download PDFInfo
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- CN203038684U CN203038684U CN 201220642315 CN201220642315U CN203038684U CN 203038684 U CN203038684 U CN 203038684U CN 201220642315 CN201220642315 CN 201220642315 CN 201220642315 U CN201220642315 U CN 201220642315U CN 203038684 U CN203038684 U CN 203038684U
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- crosslinked polyethylene
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Abstract
The utility model relates to an aluminium tube type cable used for a conductor crosslinked polyethylene insulation winding. The cable successively comprises, from inside to outside, a conductor, a crosslinked polyethylene internal shielding layer mixed with conductive carbon black, a crosslinked polyethylene insulating layer and an outer shielding layer. The conductor is an annealing soft aluminium tube. The annealing aluminium tube is adopted by the cable to serve as the conductor so that a skin effect is minimized. Moreover, cooling water is arranged in the center of the aluminium tube and is capable of uniformly reducing a temperature rise of the conductor from the cable inside, thereby avoiding influence of heating upon the service life of the cable.
Description
Technical field
The utility model belongs to the cable technology field, relates to a kind of cable, the crosslinked polyetylene insulated winding cable of especially a kind of aluminum pipe formula conductor.
Background technology
Recent two decades comes, and power cable with cross-linked polyethylene insulation has obtained using widely.Because crosslinked cable has very good electric property and mechanical and physical performance, other power equipment that utilizes it to make also occurs in succession, such as high-tension transformer, generator, reactor and motor etc.
Be example with the high-tension transformer, it is the dry-type transformer (cable winding transformer) of winding with the crosslinked cable that Sweden ABB AB in 1997 produces in the world first, its main design feature is that power cable with cross-linked polyethylene insulation is directly turned to Transformer Winding, utilize cross linked insulation to replace traditional oil immersed type insulation, thereby solved the paper oil insulation problem of traditional oil-filled transformer.
Adopt this cable winding dry-type transformer, have many advantages.Because the outer semiconducting layer of cable winding is in earth potential, so the part beyond the Transformer Winding can partial discharge and corona discharge not occur like that as transformer.Therefore in addition, the turn insulation of cable winding dry-type transformer has the insulation level identical with main insulation, does not need to adopt the measure of electric field adjustment to realize protection to insulation at winding overhang like that as transformer.Using another important advantage of cable winding dry-type transformer is to reduce the line loss of electrical network, obtains tangible economic benefit.
On the basis of exploitation cable winding transformer, the electrician author has developed power equipments such as cable winding generator, reactor, motor in succession.Come out so far from these equipment, the cable winding power equipment has replaced most legacy equipment, also can be more widely used in the future.
The conductor part of the cross-linked polyethylene insulated cable that the cable winding power equipment uses is the thin round conductor twisted bundles of the mutually insulated cut apart, the single cylindrical conductor of twisted bundles adopts fine aluminium or fine copper, strand is forced oxidation in acidity or alkaline aqueous solution, the surface can form fine and close thin layer of metal oxide, and this thin layer plays minor insulation.In addition, cooling is the major issue of power equipment, is example with the cable winding transformer, and the coolant of employing is air, can constantly be replenished, and the source is abundant.Adopt thermal resistance sensor directly to measure the winding cable hot(test)-spot temperature in the design, every desk fan is equipped with variable-frequency governor, can regulate the wind rotating speed by the control circuit of fan like this, and variation of temperature is automatically adjusted.Because the measure error of circuit and delay return data, measurement result can cause certain influence to adjustment, and practice has also proved this point.Therefore, the winding cable of the development of new type of cooling is actual needs, and huge economic benefit and social benefit are arranged.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, provide a kind of aluminum pipe formula conductor crosslinked polyetylene insulated winding cable, this cable adopts the annealing aluminum pipe to make conductor, reduced kelvin effect, the aluminum pipe center leads to cooling water in addition, can be equably from the inner temperature rise that reduces conductor of cable, the influence to cable life of avoiding generating heat.
The purpose of this utility model solves by the following technical programs:
The crosslinked polyetylene insulated winding cable of this aluminum pipe formula conductor, cable are followed successively by conductor from the inside to the outside, are mixed with the crosslinked polyethylene internal shield of conductive black, crosslinked polyetylene insulated layer and outer shielding layer; Described conductor is the soft aluminum pipe of annealing.
The outside wall surface of above-mentioned crosslinked polyethylene internal shield and the soft aluminum pipe of described annealing fits tightly.Crosslinked polyethylene internal shield thickness is 1.0～1.5mm.
The thickness of above-mentioned crosslinked polyetylene insulated layer is 4.5～10.5mm.
Above-mentioned outer shielding layer is the crosslinked polyethylene outer shielding layer that is mixed with conductive black; Thickness is 0.8～1.2mm.
The crosslinked polyetylene insulated winding of the utility model aluminum pipe formula conductor is applicable to the winding of power equipments such as dry-type transformer, generator, reactor, motor with cable.The utility model adopts the annealing aluminum pipe to make conductor, has reduced kelvin effect, and the logical cooling water in aluminum pipe center in addition can be equably from the inner temperature rise that reduces conductor of cable, the influence to cable life of avoiding generating heat.The design and use of utility model, have tangible society and economic benefit at reliability and the useful life that can improve winding cable.
Description of drawings
Fig. 1 is cable cross-section structural representation of the present utility model.
Wherein: 1 is conductor; 2 is the crosslinked polyethylene internal shield; 3 is crosslinked polyetylene insulated layer; 4 is outer shielding layer.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
Referring to Fig. 1, the crosslinked polyetylene insulated winding of aluminum pipe formula conductor of the present utility model is followed successively by conductor 1 from the inside to the outside, is mixed with the crosslinked polyethylene internal shield 2 of conductive black, crosslinked polyetylene insulated layer 3 and outer shielding layer 4 with cable; Conductor 1 is the soft aluminum pipe of annealing.Crosslinked polyethylene internal shield 2 fits tightly with the outside wall surface of the soft aluminum pipe of annealing.The thickness of this crosslinked polyethylene internal shield is 1.0～1.5mm.The thickness of crosslinked polyetylene insulated layer 3 is 4.5～10.5mm.Outer shielding layer 4 is for being mixed with the crosslinked polyethylene outer shielding layer of conductive black; Thickness is 0.8～1.2mm.
Conductor 1 of the present utility model adopts the soft aluminum pipe of annealing.Aluminum pipe is after Overheating Treatment, and conductivity rises, and bending radius is littler.Aluminum pipe hollow can reduce the kelvin effect of conductor, reduces eddy current loss.The conductor center can reduce the temperature rise influence aging to cable, the useful life of improving cable equably from the inner temperature rise that reduces conductor of cable evenly by cooling water.After changing the type of cooling, the long-term loaded-up temperature of cable can be brought up to 90 ℃ by 70 ℃, and ampacity can improve about 20%; Under the equal ampacity, the cable specification can reduce by one grade.Conductor screen of the present utility model: the crosslinked polyethylene internal shield 2 that is mixed with conductive black contacts with conductor, tightly is enclosed in around the conductor, and it is made up of the crosslinked polyethylene that is mixed with conductive black, can reduce the wastage and prevents partial discharge.
The utility model makes power equipment adopt the cable insulation winding to replace traditional oil-impregnated paper insulation.Solid-state insulating barrier is that the crosslinked polyethylene of low-dielectric loss, high breakdown strength constitutes, the very high (〉=10-17 Ω/m) of the resistivity of cross linked insulation medium.Because winding cable is subjected to the effect of different electric field strength at the whole height of winding, begin the part number of turn at winding and use than thin insulating so adopt in making, the method that progressively increases cable insulation thickness is then improved electric field strength and is reduced volume.
The outer semiconducting layer of cable of the present utility model (being outer shielding layer 4) also is made up of the crosslinked polyethylene that is mixed with conductive black, and its effect is to reduce the wastage and prevent from linking to each other partial discharge with grounding system by earth resistance, is keeping earth potential.The too high meeting of the resistivity of earth resistance causes that the current potential between two contact points is higher in the outer semiconducting layer, and resistivity is crossed to hang down and can be made the power loss in the outer semiconducting layer excessive again.Therefore, resistivity must be controlled within the specific limits, generally is about 40 Ω cm.
In sum, the crosslinked polyetylene insulated winding of aluminum pipe formula conductor of the present utility model by to structure optimization design, has reduced the kelvin effect of conductor with cable, has reduced eddy current loss, has saved the operation cost of power equipment; By the change to the cable type of cooling, improve cooling effectiveness simultaneously, prolonged the useful life of cable.The design of this product and realization have improved the combination property of cable, can satisfy actual needs better, improve fail safe and the reliability of power equipments such as generator.
Claims (5)
1. the crosslinked polyetylene insulated winding cable of aluminum pipe formula conductor is characterized in that, cable is followed successively by conductor (1) from the inside to the outside, is mixed with the crosslinked polyethylene internal shield (2) of conductive black, crosslinked polyetylene insulated layer (3) and outer shielding layer (4); Described conductor (1) is the soft aluminum pipe of annealing.
2. the crosslinked polyetylene insulated winding cable of aluminum pipe formula conductor according to claim 1 is characterized in that, described crosslinked polyethylene internal shield (2) fits tightly with the outside wall surface of the soft aluminum pipe of described annealing.
3. the crosslinked polyetylene insulated winding cable of aluminum pipe formula conductor according to claim 1 is characterized in that the thickness of described crosslinked polyethylene internal shield is 1.0～1.5mm.
4. the crosslinked polyetylene insulated winding cable of aluminum pipe formula conductor according to claim 1 is characterized in that, the thickness of described crosslinked polyetylene insulated layer (3) is 4.5～10.5mm.
5. the crosslinked polyetylene insulated winding cable of aluminum pipe formula conductor according to claim 1 is characterized in that, described outer shielding layer (4) is for being mixed with the crosslinked polyethylene outer shielding layer of conductive black; Thickness is 0.8～1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220642315 CN203038684U (en) | 2012-11-16 | 2012-11-16 | Aluminium tube type cable used for conductor crosslinked polyethylene insulation winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220642315 CN203038684U (en) | 2012-11-16 | 2012-11-16 | Aluminium tube type cable used for conductor crosslinked polyethylene insulation winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203038684U true CN203038684U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220642315 Expired - Fee Related CN203038684U (en) | 2012-11-16 | 2012-11-16 | Aluminium tube type cable used for conductor crosslinked polyethylene insulation winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203038684U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616765A (en) * | 2015-01-22 | 2015-05-13 | 安徽凌宇电缆科技有限公司 | Oil-resistant solvent-resistant motor lead wire |
| CN107705913A (en) * | 2017-08-24 | 2018-02-16 | 郑州云海信息技术有限公司 | A kind of new DC power cables and application method |
-
2012
- 2012-11-16 CN CN 201220642315 patent/CN203038684U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616765A (en) * | 2015-01-22 | 2015-05-13 | 安徽凌宇电缆科技有限公司 | Oil-resistant solvent-resistant motor lead wire |
| CN107705913A (en) * | 2017-08-24 | 2018-02-16 | 郑州云海信息技术有限公司 | A kind of new DC power cables and application method |
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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 |
Granted publication date: 20130703 Termination date: 20151116 |
|
| EXPY | Termination of patent right or utility model |