CN204011007U - For the ground screen of superhigh pressure or extra-high voltage transformer - Google Patents
For the ground screen of superhigh pressure or extra-high voltage transformer Download PDFInfo
- Publication number
- CN204011007U CN204011007U CN201420308208.5U CN201420308208U CN204011007U CN 204011007 U CN204011007 U CN 204011007U CN 201420308208 U CN201420308208 U CN 201420308208U CN 204011007 U CN204011007 U CN 204011007U
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- cable paper
- copper strips
- groove
- copper foil
- copper
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Abstract
The utility model relates to a kind of ground for superhigh pressure or extra-high voltage transformer screen, it comprises lower insulating board, upper insulating board, cable paper groove, Copper Foil, cable paper cover layer and copper strips, cable paper groove described in some is closely arranged and is bonded on lower insulating board, the middle part of each cable paper groove is respectively arranged with the groove of placing Copper Foil, the bonding Copper Foil of difference in the groove of each cable paper groove, above cable paper groove, be bonded with cable paper cover layer, the bonding upper insulating board in the tectal top of cable paper, described Copper Foil one side end is provided with the U-shaped connecting portion that bending forms, described copper strips extends to the tectal outside of cable paper through the notch of the U-shaped connecting portion on each Copper Foil, part insulation crimped paper and white cotton tape half that copper strips is positioned at cable paper cover layer outside are repeatedly wound around, outboard end at copper strips is provided with earth terminal, described copper strips is the copper strips of two-fold, the inner side of copper strips is adjacent to, and spot welding at a certain distance connects, described Copper Foil is connected by soldering with copper strips contact site.
Description
Technical field
The utility model relates to high-tension transformer accessory field, particularly a kind of ground for superhigh pressure or extra-high voltage transformer screen.
Background technology
The iron core of large-scale power transformer is mostly multistage cylindrical structural, all there is wedge angle at every grade of lamination place, after near the pressurization of iron core winding, being easy to form electric field at iron core column sharp corner concentrates, in the time that the electric field of iron core column sharp corner formation reaches initial partial discharge field intensity, just produce partial discharge, affect insulation life, even may cause insulation breakdown, therefore, the iron core column of large-scale power transformer conventionally all will be installed iron core outward and shielded, and iron core wedge angle is shielded, and makes ground electrode surface field even.Existing transformer core ground screen is normally laid many parallel thin copper belts, be welded to connect with a copper strips and each copper strips again, then by this root copper strips ground connection, the ground screen of this structure is fixing insecure to copper strips, and copper strips is easily offset, secondly, between copper strips, not prison welding is solid, easily occur rosin joint, ground connection copper cash is single line, easily broken string.
Summary of the invention
The purpose of this utility model is, for existing the problem of shielding existence described in background technology, to provide one to be connected firmly, the screen of the ground for superhigh pressure or extra-high voltage transformer that shield effectiveness is good.
The technical scheme that realizes goal of the invention of the present utility model is as follows:
A kind of ground for superhigh pressure or extra-high voltage transformer screen, it comprises lower insulating board, upper insulating board, cable paper groove, Copper Foil, cable paper cover layer and copper strips, cable paper groove described in some is closely arranged and is bonded on lower insulating board, the middle part of each cable paper groove is respectively arranged with the groove of placing Copper Foil, the bonding Copper Foil of difference in the groove of each cable paper groove, above cable paper groove, be bonded with cable paper cover layer, the bonding upper insulating board in the tectal top of cable paper, described Copper Foil one side end is provided with the U-shaped connecting portion that bending forms, described copper strips extends to the tectal outside of cable paper through the notch of the U-shaped connecting portion on each Copper Foil, part insulation crimped paper and white cotton tape half that copper strips is positioned at cable paper cover layer outside are repeatedly wound around, outboard end at copper strips is provided with earth terminal, described copper strips is the copper strips of two-fold, the inner side of copper strips is adjacent to, and spot welding at a certain distance connects, described Copper Foil is connected by soldering with copper strips contact site.
For reinforced insulation performance, described cable paper cover layer comprises the cable paper of at least two-layer 0.07mm thickness.
The groove of described cable paper groove is square groove, and the cross section of corresponding Copper Foil is also square.
For inner side after copper strips doubling is adjacent to, spot pitch is 150-200mm inside described copper strips.
Ground for superhigh pressure or extra-high voltage transformer of the present utility model screen adopts cable paper groove to position Copper Foil, Copper Foil can be arranged in parallel, prevent Copper Foil skew, adopt Copper Foil to substitute copper strips, reduce cost, Copper Foil and copper strips connecting portion are provided with U-shaped connecting portion, increase the contact area of Copper Foil and copper strips, make between Copper Foil and copper strips be connected more reliable, copper strips adopts the double-deck copper strips of doubling, copper strips inner side, according to a determining deviation spot welding, is adjacent to the copper strips inner side of doubling more, not yielding.By above setting, strengthen the fastness of ground screen, strengthen the shielding properties of ground screen, improve the quality of ground screen, also reduced production cost simultaneously.
Brief description of the drawings
Fig. 1 is the ground for superhigh pressure or extra-high voltage transformer of the present utility model screen schematic diagram;
Fig. 2 be in Fig. 1 A-A to cutaway view;
Fig. 3 be in Fig. 1 B-B to cutaway view;
In figure, 1 is lower insulating board, and 2 is upper insulating board, and 3 is cable paper groove, and 4 is Copper Foil, and 5 is cable paper cover layer, and 6 is copper strips, and 7 is U-shaped connecting portion, and 8 is white cotton tape, and 9 is insulation crimped paper, and 10 is earth terminal.
Embodiment
With reference to a kind of ground for superhigh pressure or the extra-high voltage transformer screen shown in Fig. 1, it comprises lower insulating board 1, upper insulating board 2, cable paper groove 3, Copper Foil 4, cable paper cover layer 5 and copper strips 6, cable paper groove 3 described in some is closely arranged and is bonded on lower insulating board 1, the middle part of each cable paper groove 3 is respectively arranged with the groove of placing Copper Foil 4, the bonding Copper Foil 4 of difference in the groove of each cable paper groove 3, above cable paper groove 3, be bonded with cable paper cover layer 5, the bonding upper insulating board 2 in top of cable paper cover layer 5, described Copper Foil 4 one side ends are provided with the U-shaped connecting portion 7 that bending forms, described copper strips 6 extends to the outside of cable paper cover layer 5 through the notch of the U-shaped connecting portion 7 on each Copper Foil 4, part insulation crimped paper 9 and white cotton tape 8 half that copper strips 6 is positioned at cable paper cover layer 5 outsides are repeatedly wound around, be provided with earth terminal 10 in the outboard end of copper strips 6, the copper strips that described copper strips 6 is two-fold, the inner side of copper strips 6 is adjacent to, and spot welding at a certain distance connects, described Copper Foil 4 is connected by soldering with copper strips 6 contacts site.
For reinforced insulation performance, described cable paper cover layer 5 comprises the cable paper of at least two-layer 0.07mm thickness.
The groove of described cable paper groove 3 is square groove, and the cross section of corresponding Copper Foil 4 is also square.
For inner side after making copper strips 6 doublings is adjacent to, described copper strips 6 inner side spot pitch are 150-200mm.
Ground for superhigh pressure or extra-high voltage transformer of the present utility model screen adopts cable paper groove 3 to position Copper Foil 4, Copper Foil 4 can be arranged in parallel, prevent that Copper Foil 4 is offset, adopt Copper Foil 4 to substitute copper strips, reduce cost, Copper Foil 4 is provided with U-shaped connecting portion 7 with copper strips 6 connecting portions, increase the contact area of Copper Foil 4 and copper strips 6, make between Copper Foil 4 and copper strips 6 be connected more reliable, copper strips 6 adopts the double-deck copper strips of doubling, copper strips inner side, according to a determining deviation spot welding, is adjacent to the copper strips inner side of doubling more, not yielding.By above setting, strengthen the fastness of ground screen, strengthen the shielding properties of ground screen, improve the quality of ground screen, also reduced production cost simultaneously.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not in the situation that departing from spirit and scope of the present utility model; can also make various conversion and variation and obtain the corresponding technical scheme being equal to, therefore all technical schemes that are equal to all should be included into scope of patent protection of the present utility model.
Claims (4)
1. the screen of the ground for superhigh pressure or extra-high voltage transformer, it is characterized in that: it comprises lower insulating board, upper insulating board, cable paper groove, Copper Foil, cable paper cover layer and copper strips, cable paper groove described in some is closely arranged and is bonded on lower insulating board, the middle part of each cable paper groove is respectively arranged with the groove of placing Copper Foil, the bonding Copper Foil of difference in the groove of each cable paper groove, above cable paper groove, be bonded with cable paper cover layer, the bonding upper insulating board in the tectal top of cable paper, described Copper Foil one side end is provided with the U-shaped connecting portion that bending forms, described copper strips extends to the tectal outside of cable paper through the notch of the U-shaped connecting portion on each Copper Foil, part insulation crimped paper and white cotton tape half that copper strips is positioned at cable paper cover layer outside are repeatedly wound around, outboard end at copper strips is provided with earth terminal, described copper strips is the copper strips of two-fold, the inner side of copper strips is adjacent to, and spot welding at a certain distance connects, described Copper Foil is connected by soldering with copper strips contact site.
2. the ground for superhigh pressure or extra-high voltage transformer according to claim 1 screen, is characterized in that: described cable paper cover layer comprises the cable paper of at least two-layer 0.07mm thickness.
3. the ground for superhigh pressure or extra-high voltage transformer according to claim 1 screen, is characterized in that: the groove of described cable paper groove is square groove, and the cross section of corresponding Copper Foil is also square.
4. the ground for superhigh pressure or extra-high voltage transformer according to claim 1 screen, is characterized in that: inside described copper strips, spot pitch is 150-200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308208.5U CN204011007U (en) | 2014-06-10 | 2014-06-10 | For the ground screen of superhigh pressure or extra-high voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308208.5U CN204011007U (en) | 2014-06-10 | 2014-06-10 | For the ground screen of superhigh pressure or extra-high voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204011007U true CN204011007U (en) | 2014-12-10 |
Family
ID=52050970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420308208.5U Expired - Fee Related CN204011007U (en) | 2014-06-10 | 2014-06-10 | For the ground screen of superhigh pressure or extra-high voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204011007U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048213A (en) * | 2015-08-13 | 2015-11-11 | 中国电力科学研究院 | Grounding device and grounding method for intelligent equipment electromagnetic compatibility detection |
| CN108231387A (en) * | 2017-12-20 | 2018-06-29 | 泰州新源电工器材有限公司 | A kind of device for being used to be bonded cable paper |
| CN108971681A (en) * | 2017-06-02 | 2018-12-11 | 特变电工沈阳变压器集团有限公司 | Shield lead welding technique to a kind of transformer copper |
| CN110797170A (en) * | 2018-08-01 | 2020-02-14 | 特变电工衡阳变压器有限公司 | Converter transformer |
| CN112714604A (en) * | 2019-10-26 | 2021-04-27 | 南通亚振电力科技有限公司 | High-pressure-resistant high-overload shielding paper and preparation method thereof |
| WO2022061601A1 (en) * | 2020-09-23 | 2022-03-31 | Siemens Gas And Power Gmbh & Co. Kg | Shielding device for an coil of transformer |
-
2014
- 2014-06-10 CN CN201420308208.5U patent/CN204011007U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048213A (en) * | 2015-08-13 | 2015-11-11 | 中国电力科学研究院 | Grounding device and grounding method for intelligent equipment electromagnetic compatibility detection |
| CN105048213B (en) * | 2015-08-13 | 2018-01-19 | 中国电力科学研究院 | A kind of smart machine electromagnetic compatibility detection earthing or grounding means and earthing method |
| CN108971681A (en) * | 2017-06-02 | 2018-12-11 | 特变电工沈阳变压器集团有限公司 | Shield lead welding technique to a kind of transformer copper |
| CN108231387A (en) * | 2017-12-20 | 2018-06-29 | 泰州新源电工器材有限公司 | A kind of device for being used to be bonded cable paper |
| CN108231387B (en) * | 2017-12-20 | 2024-03-19 | 泰州新源电工器材有限公司 | Device for bonding cable paper |
| CN110797170A (en) * | 2018-08-01 | 2020-02-14 | 特变电工衡阳变压器有限公司 | Converter transformer |
| CN112714604A (en) * | 2019-10-26 | 2021-04-27 | 南通亚振电力科技有限公司 | High-pressure-resistant high-overload shielding paper and preparation method thereof |
| WO2022061601A1 (en) * | 2020-09-23 | 2022-03-31 | Siemens Gas And Power Gmbh & Co. Kg | Shielding device for an coil of transformer |
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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: 20141210 Termination date: 20150610 |
|
| EXPY | Termination of patent right or utility model |