CN202996532U - Novel large-current sleeve for transformer - Google Patents
Novel large-current sleeve for transformer Download PDFInfo
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- CN202996532U CN202996532U CN 201220586019 CN201220586019U CN202996532U CN 202996532 U CN202996532 U CN 202996532U CN 201220586019 CN201220586019 CN 201220586019 CN 201220586019 U CN201220586019 U CN 201220586019U CN 202996532 U CN202996532 U CN 202996532U
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- sleeve pipe
- electric current
- large electric
- current sleeve
- novel transformer
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Abstract
The utility model discloses a novel large-current sleeve for a transformer. The novel large-current sleeve comprises a conductor structure and an insulator, wherein the conductor structure comprises a wiring terminal in gas, a central conductor and a wiring terminal in oil sequentially from top to bottom; the insulator is arranged at the periphery of the central conductor; and the central conductor comprises more than two metal rods or metal pipes with the identical length and metal plates fixedly connected to two ends of the metal rods or metal pipes. The novel large-current sleeve has the characteristics of low temperature rise, no partial discharge, low dielectric loss, no maintenance, convenience in mounting, attractive appearance and the like and is inevitably popularized and applied widely.
Description
Technical field
The utility model relates to the large electric current sleeve pipe of a kind of novel transformer.
Background technology
The large electric current sleeve pipe of transformer industry generally adopts capacitance type structure at present, such as paper condenser, epoxy impregnation formula etc., all to increase the capacitive insulation layer on the very large conductor of external diameter, this type of jacket exterior size and own wt are all larger, install and safeguard very inconvenience, in addition, the large electric current sleeve pipe of capacitance type structure, the conductor weak heat-dissipating, problem of temperature rise is more serious, the heat that conductor produces can not Quick diffusing, it is overheated easily to cause, causes the problems such as internal over pressure, main insulation heat ageing, affects product and normally moves.On the other hand, due to the impact of kelvin effect, electric current is higher, select the diameter of conductor also larger, even adopt tubing, when electric current reaches certain value, the section bar of manufacturing large-size is also very difficult, and this is also one of bottleneck of limiting boot current class lifting.
The utility model content
The purpose of this utility model is to provide the large electric current sleeve pipe of a kind of novel transformer, has overcome that prior art weight is large, conductor weak heat-dissipating, temperature rise, inefficiency, making difficulty, high in cost of production defective.
For solving the problems of the technologies described above, the technical solution of the utility model is:
The large electric current sleeve pipe of a kind of novel transformer, comprise conductor structure and insulation, described conductor structure comprises gas middle connecting terminal, center conductor and oily middle connecting terminal from top to bottom successively, described insulation is located at the center conductor periphery, described center conductor comprises metal bar isometric more than two or metal tube, and the metallic plate that is connected in metal bar or metal tube two ends.
The large electric current sleeve pipe of above-mentioned novel transformer guiding center conductor comprises metal bar or the metal tube more than two, has increased conductive area, has improved electrical efficiency, and be conducive to heat radiation, easy to make.Modes such as can adopting welding is connected.
Make, carry for convenient, improve electrical efficiency, described metal bar or metal tube are more than the six roots of sensation.
In order to improve the uniformity of center conductor conduction, described metal bar or metal tube are arranged in the form of a ring.
Above-mentioned ring-type comprises the curve that annulus, elliptical ring etc. seamlessly transit, and has so effectively avoided kelvin effect, is preferably circular.
Make for convenient, and can guarantee the conductance of center conductor, described metal bar or metal tube have eight.
For the ease of using, described insulation comprises in gas porcelain bushing in porcelain bushing and oil from top to bottom successively, insulation also comprises and is located in gas the insulation oil reservoir between insulator and center conductor in insulator and oil, be provided with radome between week and center conductor periphery in mounting flange, described gas middle connecting terminal is provided with air relief cock.Being provided with of radome is beneficial to the distribution that improves field intensity, avoids partial discharge.
Above-mentioned insulation oil reservoir is interior insulation, in gas in porcelain bushing and oil porcelain bushing be external insulation, be preferably the true procelain structure,
The large electric current sleeve pipe of described novel transformer also can adopt the epoxy resin impregnated paper condenser-type terminal, and described center conductor is arranged with insulating cylinder outward.Epoxy resin impregnated paper condenser-type terminal external insulation also can adopt above-mentioned porcelain bushing structure.External insulation also can adopt other forms.
For easy to use, reduce costs, guarantee simultaneously insulation effect, described insulating cylinder is poured into a mould by epoxy impregnation by ply of paper and aluminium foil layer and is formed.
For economical with materials, weight reduction, described center conductor comprises metal tube isometric more than two.
In order to guarantee the conductive effect of metal tube, the wall thickness of described metal tube is 8-15mm.
Center conductor can adopt the preparation of metals such as aluminium, copper.Metal bar is solid construction, and metal tube is hollow structure.
The large electric current sleeve pipe of this novel transformer have temperature rise low, without office put, the various features such as low dielectric loss, non-maintaining and easy for installation, good looking appearance, will obtain extensive promotion and application, specific as follows: unique center conductor structural design, for significantly improving the product current capacity, and the product that manufactures and designs larger current class provides effective foundation, and large senior general low product weight, improved fail safe; Heat radiation in service is convenient in the existence of sleeve pipe conductor internal cavities and oil clearance, plays vital effect for reducing temperature rise, can guarantee the operation of product long time stability; This conductor structure design is applicable to the true procelain structure, epoxy soaks the multiple sleeve structure current－carrying conductor designs such as paper structure; This center conductor structure is equally applicable to other products that needs the structural design of high current－carrying conductor.
Description of drawings
Fig. 1 is the structural representation of the utility model conductor.
Fig. 2 is that Figure 1A-A is to zoomed-in view.
Fig. 3 is the utility model pure porcelain casing tube structural representation.
Fig. 4 is the utility model dry type epoxy resin impregnated paper condenser-type terminal.
Fig. 5 is that Fig. 4 A-A is to zoomed-in view.
Embodiment
In order to understand better the utility model, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model not only is confined to the following examples.
Conductor structure as shown in Figure 1, 2 is: with eight even circular arrangements of isometric aluminum pipe 1, and weld to get center conductor 9 with the aluminium sheet 2 that is positioned at aluminum pipe 1 two ends, center conductor 9 one end welding gas middle connecting terminals 3, other end aluminium soldering oil middle connecting terminal 4, gas middle connecting terminal 3 is provided with air relief cock and is convenient to get rid of the inside pipe casing air, makes the inner chamber oil clearance be full of transformer oil.
This kind structural design, can significantly improve the current-carrying area in the confined space, greatly reduce the impact of kelvin effect, can effectively solve the conductor manufacturing to the restriction of product size, make the product that manufactures and designs larger current class become possibility, the existence of internal cavities and oil clearance can guarantee energy efficiently radiates heat in service, reduce the product temperature rise, and each conductor aluminum pipe is in equipotential, and electric field is relatively even, and is very little for the internal discharge impact.This kind structure is equally applicable to copper conductor design, but under large current class, conductor weight is higher.
Embodiment 2
As shown in Figure 3, embodiment 1 gained conductor structure is adopted true procelain formula sleeve pipe, described true procelain formula sleeve pipe comprises insulator 7 in insulator 5 in gas, mounting flange 6 and oil from top to bottom successively, insulation also comprises and is located in gas the insulation oil reservoir 8 between insulator and center conductor in insulator and oil, be provided with radome between described interior week of mounting flange 6 and center conductor 9 peripheries, described gas middle connecting terminal 5 is provided with air relief cock, during use, mounting flange 6 is connected with transformer-cabinet 10, and ground connection during mounting flange 6 operation.In figure, the arrow indication is oil circuit.
This design has reduced the manufacture difficulty of porcelain insulating, has been full of transformer oil between conductor and porcelain piece, and this oil clearance is as the main insulation of sleeve pipe, and dielectric dissipation factor tan δ is very little, less than 0.2%.Ground connection during the flange operation, this position electric field strength is very effective for reducing, also greatly reduce the partial discharge quantity at this place, when electric pressure is higher, locate the field strength distribution that radome can improve this place is installed at sleeve pipe mounting flange (grounded part), make product under power-frequency withstand voltage without partial discharge, the 40.5kV/25000A sleeve pipe, measure under 85kV voltage, its partial discharge quantity is 2pC only.
As shown in Fig. 4,5, embodiment 1 products obtained therefrom is adopted the epoxy resin impregnated paper condenser-type terminal, the aluminum pipe of annular arrangement is increased insulating cylinder 11 outward, insulating cylinder is composited by ply of paper and aluminium foil layer, the mode that adopts epoxy to soak paper is processed conductor main insulation, all the other external insulation structures and mounting means are identical with example 2, possess equally that rapid heat dissipation, temperature rise low, low office puts, low dielectric loss, the advantages such as stable and reliable operation.In figure, 12 is capacitor core, and 13 are the end shield lead-in wire.
The utility model is NM all with reference to prior art.
Claims (10)
1. large electric current sleeve pipe of novel transformer, it is characterized in that: comprise conductor structure and insulation, described conductor structure comprises gas middle connecting terminal, center conductor and oily middle connecting terminal from top to bottom successively, described insulation is located at the center conductor periphery, described center conductor comprises metal bar isometric more than two or metal tube, and the metallic plate that is connected in metal bar or metal tube two ends.
2. the large electric current sleeve pipe of novel transformer as claimed in claim 1, it is characterized in that: described metal bar or metal tube are more than the six roots of sensation.
3. the large electric current sleeve pipe of novel transformer as claimed in claim 2, it is characterized in that: described metal bar or metal tube are arranged in the form of a ring.
4. the large electric current sleeve pipe of novel transformer as claimed in claim 3, it is characterized in that: described metal bar or metal tube have eight.
5. the large electric current sleeve pipe of novel transformer as described in claim 1 to 4 any one, it is characterized in that: described insulation comprises in gas porcelain bushing in porcelain bushing and oil from top to bottom successively, insulation also comprises and is located in gas the insulation oil reservoir between insulator and center conductor in insulator and oil, be provided with radome between week and center conductor periphery in mounting flange, described gas middle connecting terminal is provided with air relief cock.
6. the large electric current sleeve pipe of novel transformer as described in claim 1 to 4 any one, it is characterized in that: the large electric current sleeve pipe of described novel transformer is the epoxy resin impregnated paper condenser type.
7. the large electric current sleeve pipe of novel transformer as claimed in claim 6, it is characterized in that: described center conductor is arranged with insulating cylinder outward.
8. the large electric current sleeve pipe of novel transformer as claimed in claim 7, it is characterized in that: described insulating cylinder is poured into a mould by epoxy impregnation by ply of paper and aluminium foil layer and is formed.
9. the large electric current sleeve pipe of novel transformer as claimed in claim 1, it is characterized in that: described center conductor comprises metal tube isometric more than two.
10. the large electric current sleeve pipe of novel transformer as claimed in claim 9, it is characterized in that: the wall thickness of described metal tube is 8-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220586019 CN202996532U (en) | 2012-11-08 | 2012-11-08 | Novel large-current sleeve for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220586019 CN202996532U (en) | 2012-11-08 | 2012-11-08 | Novel large-current sleeve for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202996532U true CN202996532U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220586019 Expired - Fee Related CN202996532U (en) | 2012-11-08 | 2012-11-08 | Novel large-current sleeve for transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN202996532U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295736A (en) * | 2013-06-27 | 2013-09-11 | 特变电工沈阳变压器集团有限公司 | Labyrinth oil circulation exchange structure for insulating-gas inflated direct-current bushing |
| CN103345990A (en) * | 2013-06-16 | 2013-10-09 | 中国科学院电工研究所 | Line outgoing casing pipe applied to high-pressure superconductivity electrical equipment |
| CN106597179A (en) * | 2017-01-25 | 2017-04-26 | 沈阳变压器研究院股份有限公司 | Coaxial type high-current casing pipe temperature rise testing device |
| CN113488286A (en) * | 2021-06-17 | 2021-10-08 | 重庆市南方阻燃电线电缆有限公司 | Wire repairing method and wire repairing structure of mineral magnesium oxide insulated copper sheathed cable |
-
2012
- 2012-11-08 CN CN 201220586019 patent/CN202996532U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345990A (en) * | 2013-06-16 | 2013-10-09 | 中国科学院电工研究所 | Line outgoing casing pipe applied to high-pressure superconductivity electrical equipment |
| CN103345990B (en) * | 2013-06-16 | 2015-08-26 | 中国科学院电工研究所 | A kind of outlet casing tube being applied to high pressure superconducting power apparatus |
| CN103295736A (en) * | 2013-06-27 | 2013-09-11 | 特变电工沈阳变压器集团有限公司 | Labyrinth oil circulation exchange structure for insulating-gas inflated direct-current bushing |
| CN103295736B (en) * | 2013-06-27 | 2016-06-29 | 沈阳和新套管有限公司 | Fill insulating gas DC bushing labyrinth type oil circulation switching fabric |
| CN106597179A (en) * | 2017-01-25 | 2017-04-26 | 沈阳变压器研究院股份有限公司 | Coaxial type high-current casing pipe temperature rise testing device |
| CN106597179B (en) * | 2017-01-25 | 2024-03-19 | 沈阳变压器研究院有限公司 | Coaxial type heavy-current sleeve temperature rise test device |
| CN113488286A (en) * | 2021-06-17 | 2021-10-08 | 重庆市南方阻燃电线电缆有限公司 | Wire repairing method and wire repairing structure of mineral magnesium oxide insulated copper sheathed cable |
| CN113488286B (en) * | 2021-06-17 | 2022-09-30 | 重庆市南方阻燃电线电缆有限公司 | Wire repairing method and wire repairing structure of mineral magnesium oxide insulated copper sheathed cable |
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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: 20130612 Termination date: 20211108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |