CN102237157B - Dry-type all-insulating tubular bus - Google Patents
Dry-type all-insulating tubular bus Download PDFInfo
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- CN102237157B CN102237157B CN201010152738A CN201010152738A CN102237157B CN 102237157 B CN102237157 B CN 102237157B CN 201010152738 A CN201010152738 A CN 201010152738A CN 201010152738 A CN201010152738 A CN 201010152738A CN 102237157 B CN102237157 B CN 102237157B
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Abstract
The invention discloses a dry-type all-insulating tubular bus and relates to power generation, transmission, transformation and distribution devices of an electric power system. The dry-type all-insulating tubular bus comprises a hollow conducting tube, a first epoxy resin insulating layer and a first shielding layer, wherein the first epoxy resin insulating layer is coated outside the hollow conducting tube; and the first shielding layer is coated outside the first epoxy resin insulating layer. By using a coaxial capacitance principle and an epoxy resin molding technology, the dry-type all-insulating tubular bus has the advantages of high bus capacity, low volume, energy conservation, maintenance-free performance, safe operation and convenience for large-scale manufacturing.
Description
Technical field
The present invention relates to electric power system generating, transmission of electricity, become the distribution device, specifically is a kind of novel dry type all insulation tube type bus.
Background technology
Along with China's rapid development of economy, supply electricity capacity unprecedented soaring.The step down side rated current is also continuing to increase.At present, 110KV and 220KV transformer separate unit capacity reach 120MVA, and low-pressure side voltage is 6.3---13.8KV, and operating current is up to 5000A---11000A.Simultaneously, during China's separate unit capacity 125MW and following thermal power generation unit are in and close down gradually.200MW, 300MW and 600MW machine consist of the main flow generating equipment, and its outlet voltage is respectively 15.75KV, 18KV and 20KV, and the outlet electric current is respectively 8625A, 11320A and 19000A.
Existing bus comprises conventional rectangular bus bar (flexible copper bar bus) and the wrapped all insulation tube type bus of filling type teflin tape, and the bus of these two kinds of structures can't satisfy the requirement at big electric current Down Highway heating and short-circuit electromotive force:
1),,, can not reach the purpose that is completely fixed even the stingy heat-shrink tube that added tightens up layer because teflin tape is very smooth for the wrapped all insulation tube type bus of filling type teflin tape.In production, transportation, installation and running, teflin tape and screen are inevitable along collecting together of bus axis, must cause electric field distribution inequality and bad change takes place;
Teflin tape is extruded the bubble between each layer by being coated with silicone oil in winding process, belong to the insulation of oil immersion wet type, can't avoid the interlayer entrained air bubbles.This processing worker generation will be shown high to production place humiture, simultaneously, owing to adopt artificial wrapped production, the workman perspires, sneezes etc. and can bring the impurity that causes into, product office put be difficult to up to standard.Along with the increase of the operation time limit, the bubble or the impurity that are mingled with constantly discharge, and bubble dielectric is on every side constantly corroded, and office discharges water to put down and runs down, until flashover breakdown.According to statistics, this isolated bus was operation about 3 years, and office high-volume very easily exceeds standard, and causes frequently taking place accidents such as puncture, had brought great threat for the safe operation of electrical network.
Teflin tape and shielding paper tension, bending strength are low, this wrapped formula isolated bus, because each layer can independently slide, in the deformation of bus, insulating material can not meet with stresses, and each is to unbalanced stress, can cause local deformation to misplace even situation such as fracture.
2) conductive bodies of conventional rectangular bus bar is a solid conductor, and kelvin effect is big in the course of the work, and electric energy loss in transmission course is big, brings declining to a great extent of current capacity, has a strong impact on and restrict the safe operation of transformer station.And heat dispersion is not good, and working temperature is higher, and all influential to bus use and life-span, mechanical strength is general,
Summary of the invention
In order to solve the problem that exists in the prior art, the present invention provides a kind of dry type all insulation tube type bus, reaches the purpose that improves fail safe, reduces the wastage, improves intensity and electric property through improving bus structure.
For this reason, the present invention adopts following technical scheme:
Dry type all insulation tube type bus is characterized in that it comprises:
Hollow contact tube has the interior air duct that runs through body;
Be coated on the first epoxy resins insulation layer in the contact tube outside, hollow contact tube is insulated with the external world mutually;
Be coated on the first outer screen of the first epoxy resins insulation layer.
The present invention adopts the epoxy resins insulation layer of dry type, is convenient to straight forming, and each layer is consolidated, and does not have between each layer and collects together, and Electric Field Distribution is even, and hollow contact tube skin effect coefficient is low, and loss is little.
As to the improving and replenishing of technique scheme, the present invention further takes the following technical measures or the combination in any of these measures:
Described first screen is coated with the second epoxy resins insulation layer; The second epoxy resins insulation layer is coated with the secondary shielding layer; Described secondary shielding layer is coated with the 3rd epoxy resins insulation layer; The 3rd epoxy resins insulation layer is coated with the 3rd screen, and the 3rd screen links to each other with the ground zero potential, forms the shielding protection layer.
Described hollow contact tube, each epoxy resins insulation layer and screen are the coaxial circles body.
Described epoxy resins insulation layer forms through automatic pressure gelation process, solidifies insulating material and screen in aggregates.
Described bus two ends have the ventilation hole that is communicated with the interior air duct of hollow contact tube.
Beneficial effect: the present invention utilizes the coaxial capacitance principle, adopts the molding for epoxy resin technology, and the bus capacity is big, volume is little, energy-conservation, non-maintaining, and work safety is convenient to extensive manufacturing.
Description of drawings
Fig. 1 is the structural representation of bus of the present invention.
Embodiment
Dry type all insulation tube type bus as shown in Figure 1; Comprise hollow contact tube 1, the first epoxy resins insulation layer 2, first screen 3, the second epoxy resins insulation layer 4, secondary shielding layer 5, the 3rd epoxy resins insulation layer 6, the 3rd screen 7 from inside to outside successively; The 3rd screen links to each other with the ground zero potential, forms the shielding protection layer.Hollow contact tube, each epoxy resins insulation layer and screen are the coaxial circles body.
The present invention adopts epoxy resin specially-shaped technology, even release pressure, and each is to stress equilibrium, and village's matter density is consistent, and the magnetic line of force does not have distortion symmetrically, no bubble, office puts and is almost equal to zero.Because the good insulation characterisitic and the curing characteristics of epoxy resin itself.Epoxy resin becomes as a whole with insulating material and each layer screen full solidification, can't cut apart mobilely, and tension and flexural stress are 30 times of common bus.In process of production, owing to adopt vacuum pouring technology, middle not stratified, not oil-filled, for pouring into a mould the dry insulation of one fully, thoroughly avoided the generation of bubble in the insulating material, office discharges water to put down and can not change along with the time.It is a kind of perfect busbar connection system.
The design of bus available modules, the uranium pipe that with the external diameter is ∮ 70 be as conductor, and the bus external diameter is unified to be ∮ 100, the equal unified specifications of annex such as bus gold utensil, and deceleration annex quantity and kind are convenient to large-scale production, installation and O&M.
Advantage of the present invention comprises:
1), ampacity is big
The main body of dry type all insulation tube type bus is hollow copper tubing or aluminium-alloy pipe, and surface area is big, conventional relatively rectangular bus bar, and its conductive surface electric current distribution is even, and maximum amount is decided electric current can reach 20000A.
2), mechanical strength is high
Dry type all insulation tube type bus main body allowable stress is 4 times of rectangular bus bar, and the short circuit current that can bear is big, and mechanical strength is high, makes bus support the span maximum and can reach 9 meters.
3), good heat dissipation, temperature rise are low
Dry type all insulation tube type bus is a hollow conductor, and the bus two ends have ventilation hole, and the internal diameter air channel can form hot-air convection naturally, and radiating condition is good, and temperature rise is low.The tube type bus connecting portion, temperature rise is lower than conductor.
4), loss is low
Copper loss is low, and the profile of dry type all insulation tube type bus has determined that its surperficial skin effect coefficient is low, Kf≤1, and resistivity is up to 99.98%, and resistance is little, thereby copper loss is low.Decrease in no whirlpool, totally-enclosed, all insulation bus that this tube type bus is made up of the multilayer screen layer, outermost layer shielding layer grounding zero potential.Thereby to around the no electromagnetic induction of permeability magnetic material (gold utensil, steel framework and pillar in reinforcing bar etc.), do not have the whirlpool damage basically, tube type bus compares that rectangular bus bar is energy-conservation to reach 10%.
5), electrical insulation properties is strong
Dry type all insulation tube type bus adopts epoxy resin APG (automatic pressure gelation process) technology, forms insulating material and high axiality and the inhomogeneity insulation system of shielding material, and current potential is zero by lining and outer reduction successively up to surperficial earthing of casing current potential.Because electric shield has: a. makes Electric Field Distribution even, and does not receive the electric field and the magnetic interference of other phase bus; B. CONTROLLED POTENTIAL with the restriction electric field; C. avoid producing partial discharge at insulating surface; D. conduct leakage current and charging current; E. the touch voltage of danger such as is protected at characteristic, so this insulated shield cable shape busbar Electric Field Distribution is even, the dielectric loss of insulating barrier is not higher than 0.01%, and electrical insulation properties is very strong.Right directly to be laid in cable trough and the cable interlayer.
6), the insulating material heat-resistance coefficient is high
The main insulation material of dry type all insulation tube type bus is an epoxy resin, and good weatherability and chemical stability are arranged, can be at-40 ℃---operate as normal in the time of+200 ℃, material fire-retardant, ageing-resistant performance is strong, be no less than 20 years the useful life of product.
7), high dynamic stability
Moving stability test result shows that dry type all insulation tube type bus can directly be fixed on steel framework or the concrete support, and cancellation wall bushing and post insulator have extremely strong dynamic stability.As, the copper tube type bus of voltage 10KV, rated current 4000A, the impact that can bear 63KA (4S) short circuit current.
8), do not receive environmental interference, reliability is high
Dry type all insulation tube type bus adopts epoxy resin to process through special process, every equal mutually shielding insulation, and inner no condensation produces, and has eliminated extraneous moisture, caused ground connection of dust and foreign object and phase fault, operation has the reliability of height.
9), the bus framework is succinct, layout is clear, easy for installation
Dry type all insulation tube type bus props up intercolumniation and is generally 3000mm, and spaced apart is generally 300mm, no wall bushing and post insulator.The bus bending radius is little, is not more than 300mm, the layout of can turning flexibly, and the bus framework is succinct, and the corridor takes up room little, gives to arrange and install to bring great convenience.
10), the product once mounting, maintenance-free.
Should be pointed out that present embodiment just lists expressivity principle of the present invention and effect are described, but not be used to limit the present invention.Any personnel that are familiar with this technology all can make amendment to the foregoing description under spirit of the present invention and scope.Therefore, rights protection scope of the present invention should be listed like claims.
Claims (3)
1. dry type all insulation tube type bus is characterized in that it comprises:
Hollow contact tube has the interior air duct that runs through body;
Be coated on the first epoxy resins insulation layer in the contact tube outside, hollow contact tube is insulated with the external world mutually;
Be coated on the first outer screen of the first epoxy resins insulation layer;
Described first screen is coated with the second epoxy resins insulation layer; The second epoxy resins insulation layer is coated with the secondary shielding layer; Described secondary shielding layer is coated with the 3rd epoxy resins insulation layer; The 3rd epoxy resins insulation layer is coated with the 3rd screen, and the 3rd screen links to each other with the ground zero potential, forms the shielding protection layer;
Described epoxy resins insulation layer forms through automatic pressure gelation process, solidifies insulating material and screen in aggregates.
2. dry type all insulation tube type bus according to claim 1 is characterized in that: described hollow contact tube, each epoxy resins insulation layer and screen are the coaxial circles body.
3. according to each described dry type all insulation tube type bus of claim 1 to 2, it is characterized in that: described bus two ends have the ventilation hole that is communicated with the interior air duct of hollow contact tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010152738A CN102237157B (en) | 2010-04-22 | 2010-04-22 | Dry-type all-insulating tubular bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010152738A CN102237157B (en) | 2010-04-22 | 2010-04-22 | Dry-type all-insulating tubular bus |
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| Publication Number | Publication Date |
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| CN102237157A CN102237157A (en) | 2011-11-09 |
| CN102237157B true CN102237157B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010152738A Active CN102237157B (en) | 2010-04-22 | 2010-04-22 | Dry-type all-insulating tubular bus |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856001B (en) * | 2012-10-09 | 2015-06-17 | 清远市合意氟塑电线有限公司 | Communication cable and production process thereof |
| CN103077770A (en) * | 2013-01-24 | 2013-05-01 | 张选 | Insulating tubular generatrix and production method for same |
| CN103680685B (en) * | 2013-12-20 | 2016-08-17 | 浙江南网电气有限公司 | Dry type full-shield insulative tubular bus |
| CN107230521B (en) * | 2017-07-16 | 2022-11-25 | 深州市远征氟塑料有限公司 | Integrated insulating tubular bus, special production equipment and preparation method of bus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0237441A2 (en) * | 1986-03-13 | 1987-09-16 | Standard Telefon Og Kabelfabrik A/S | Coaxial fluid cooled high frequency high power cable |
| CN1702780A (en) * | 2005-06-13 | 2005-11-30 | 罗志昭 | Novel insulated main lead |
| CN2755739Y (en) * | 2004-11-16 | 2006-02-01 | 马宇慧 | Tubular insulative trunk |
| CN101022042A (en) * | 2007-03-01 | 2007-08-22 | 罗志昭 | Insulation composite pipe bus and producing method thereof |
| CN101546626A (en) * | 2009-05-05 | 2009-09-30 | 天津市津特线缆有限责任公司 | Hollow self-cooled cable |
| CN201397713Y (en) * | 2009-01-20 | 2010-02-03 | 江苏大全封闭母线有限公司 | Shielding insulation sleeve for tube busbar |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1131424A (en) * | 1997-07-10 | 1999-02-02 | Hitachi Cable Ltd | Superconducting current limiting cable |
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2010
- 2010-04-22 CN CN201010152738A patent/CN102237157B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0237441A2 (en) * | 1986-03-13 | 1987-09-16 | Standard Telefon Og Kabelfabrik A/S | Coaxial fluid cooled high frequency high power cable |
| CN2755739Y (en) * | 2004-11-16 | 2006-02-01 | 马宇慧 | Tubular insulative trunk |
| CN1702780A (en) * | 2005-06-13 | 2005-11-30 | 罗志昭 | Novel insulated main lead |
| CN101022042A (en) * | 2007-03-01 | 2007-08-22 | 罗志昭 | Insulation composite pipe bus and producing method thereof |
| CN201397713Y (en) * | 2009-01-20 | 2010-02-03 | 江苏大全封闭母线有限公司 | Shielding insulation sleeve for tube busbar |
| CN101546626A (en) * | 2009-05-05 | 2009-09-30 | 天津市津特线缆有限责任公司 | Hollow self-cooled cable |
Non-Patent Citations (1)
| Title |
|---|
| JP平11-31424A 1999.02.02 |
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| CN102237157A (en) | 2011-11-09 |
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