CN204242783U - A kind of shielding body of high voltage transformer tap lead wire - Google Patents
A kind of shielding body of high voltage transformer tap lead wire Download PDFInfo
- Publication number
- CN204242783U CN204242783U CN201420427249.6U CN201420427249U CN204242783U CN 204242783 U CN204242783 U CN 204242783U CN 201420427249 U CN201420427249 U CN 201420427249U CN 204242783 U CN204242783 U CN 204242783U
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- wire
- lead
- paper
- shielding body
- plain conductor
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Abstract
The utility model provides a kind of shielding body of high voltage transformer tap lead wire, comprise lead-in wire, plain conductor, crimped paper and metal wrinkled paper, crimped paper insulation is dressed outside to respective electrode shield diameter at described lead-in wire, place plain conductor, add gold filled and belong to the metal wrinkled paper in facing half repeatedly one deck, the additional bag crimped paper of metal wrinkled paper is to relevant voltage grade insulation thickness; Plain conductor is connected with lead-in wire, becomes equipotential line.The utility model simplifies lead-in wire shielding body, save winding protruding head for line, save workload, improve lead-in wire wrapping machinery and electrical strength, ensure that high voltage transformer is around lead-in wire shielding workmanship, improve extra-high pressure transformer lead Electric Field Distribution, reduce partial discharge of transformer level.
Description
Technical field
The utility model belongs to high-power transformer and manufactures field, is specifically related to a kind of shielding construction of high voltage transformer tap lead wire.
Background technology
The shielding construction of conventional high voltage transformer tap lead wire is for as shown in Figure 1: coil root 1 ' lift one's head wire 2 ', first wire 2 ' is removed turn insulation rear surface filling aluminum chaff 3 ', by aluminium foil multi-laminate together, form the aluminum foil strip that 20 ~ 40mm is wide, 0.5 ~ 2mm is thick, aluminum foil strip 3 ' is filled out and is placed on wire 2 ' surrounding, outside uses aluminum foil strip 3 ' to tightly wrap again, outside with metallization crimped paper 4 ' (metal covering inwardly) wrapping formation shielding; . more during high voltage product needed larger diameter bucking electrode, after wrapping up crimped paper 5 ' insulation on this basis, wrapping forms secondary shield again, specifically comprise: with metallization crimped paper 6 ' (metal covering outwardly) wrapping one deck, middle metallic braid or the copper cash of adopting is as short circuit band 7 ', metallization crimped paper 8 ' (metal covering inwardly) wrapping one deck, finally again wraps up crimped paper 9 ' and insulate.
For the transformer of high voltage low capacity, just easily produce following four problems so in the course of the work.
1. transformer lead size is less, and aluminium foil loading is large, loose after causing shielding, not consolidation.
2. troublesome poeration, waste dressing time.
3., because a large amount of aluminium foil in inside is filled, after insulating wrapping, lead-in wire easily rotates because external force produces, insecure.
4. conventional wire shielding construction, forms major diameter bucking electrode, is unfavorable for improving the distribution of transformer lead surface electric field intensity from the position ability that coil root is distant.
Utility model content
The utility model, for above shortcoming, carries out technological innovation to it further, provides a kind of shielding body of high voltage transformer tap lead wire, improves machinery and the electric property of the shielding of high voltage transformer tap lead wire.Effectively improve the distribution of transformer lead surface electric field intensity to reach, reduce the object of partial discharge of transformer level.
For achieving the above object, the utility model is taked following technical proposals to realize:
A kind of shielding body of high voltage transformer tap lead wire, comprise lead-in wire, plain conductor, crimped paper and metal wrinkled paper, crimped paper insulation is dressed outside to respective electrode shield diameter at described lead-in wire, place plain conductor, add gold filled and belong to the metal wrinkled paper in facing half repeatedly one deck, the additional bag crimped paper of metal wrinkled paper is to relevant voltage grade insulation thickness; Plain conductor is connected with lead-in wire, becomes equipotential line.
Further, described plain conductor is copper strap wire, is surrounded with aluminum foil strip.
Further, described plain conductor and lead-in wire Cold welding.
Further, plain conductor crimps with cold-pressed joint together with lead-in wire.
Further, the cold-pressed joint aluminium foil after crimping shields.
Further, metal wrinkled paper is wrapped up from distance of wire root 20mm place.
In a word, the beneficial effects of the utility model are:
The utility model coil lifts one's head wire for the original insulation of band, the electrode screening size to corresponding electric pressure is wrapped up with crimped paper, by wrapping metallization crimped paper on wire, formed by the large diameter bucking electrode of wire as equipotential line, it is wrapped up the insulation of respective thickness, the shielding reaching lead-in wire makes, described shielding construction is without the need to removing the original insulating barrier of wire, directly dress outside insulation at wire, and only wrap up once metal wrinkled paper, simplify in prior art the shielding body that goes between, save winding protruding head for line, save workload, improve lead-in wire wrapping machinery and electrical strength, ensure that high voltage transformer is around lead-in wire shielding workmanship, improve extra-high pressure transformer lead Electric Field Distribution, reduce partial discharge of transformer level.
Accompanying drawing explanation
Fig. 1 is the high voltage transformer tap lead wire shielding body schematic diagram of prior art.
Fig. 2 is the utility model embodiment high voltage appearance transformer tap lead wire shielding body schematic diagram.
Fig. 3 is A-A sectional schematic diagram in Fig. 2.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
Fig. 2 is the utility model embodiment high voltage appearance transformer tap lead wire shielding body schematic diagram, and Fig. 3 is A-A sectional schematic diagram in Fig. 2.Composition graphs 1 and Fig. 2 known, the shielding body of the high voltage transformer tap lead wire in the present embodiment, comprises tap lead wire 1, the first insulating barrier 2, short circuit band 3, metal wrinkled paper screen 4, second insulating barrier 5, and aluminium foil fills 6 and cold-pressed joint 7.
Wherein tap lead wire 1 is with original insulation, then from coil root 8, wraps up formation first insulating barrier 2 with crimped paper.The width W of the first insulating barrier 2 is determined by the electric pressure of transformer, and wherein W is of a size of, 500 kV: 40 ~ 45 mm; 330kV: 29 ~ 30 mm; 220kV: 19 ~ 20mm; 110kV: 14 ~ 15mm.
Short circuit band 3 can adopt various metals wire, preferably adopts bare copper flat wire in the present embodiment, and after gas welding heating anneal is softening, clean surface, chamfering is carried out in one end, and make the round and smooth impulse-free robustness in its end, copper strap wire aluminum foil strip holds.
On the broadside of lifting one's head wrapping the first insulating barrier 2, add short circuit band 3(length and to lift one's head wire identical), termination distance coil root 8 place 50 mm, fixes with the interim colligation of strap, makes short circuit band 3 and tap lead wire 1 close contact.
Metal wrinkled paper adopts metal covering inwardly, and wrapping from the place of distance coil root 8 place 20mm, partly repeatedly one deck is wrapped up, and with short circuit band 3 close contact, forms metal wrinkled paper screen 4.
In tap lead wire 1 assembling process, short circuit band 3 carries out colding pressing crimping with cold-pressed joint 7 together with tap lead wire 1, forms equipotential line.Adopt aluminium foil to fill 6 to cold-pressed joint 7 after crimping to shield.
Then from coil root 8, again wrap up formation second insulating barrier 5 with crimped paper, namely complete high voltage transformer lead-in wire shielding manufacture process.
The application of the above measures, simplify lead-in wire shielding body, save winding protruding head for line, save workload, improve lead-in wire wrapping machinery and electrical strength, ensure that high voltage transformer is around lead-in wire shielding workmanship, improves extra-high pressure transformer lead Electric Field Distribution, reduces partial discharge of transformer level.
Although the utility model discloses as above with preferred embodiment, the utility model is not defined in this.Any those skilled in the art, not departing from spirit and scope of the present utility model, all can make various changes or modifications, and therefore protection range of the present utility model should be as the criterion with claim limited range.
Claims (6)
1. the shielding body of a high voltage transformer tap lead wire, it is characterized in that, comprise lead-in wire, plain conductor, crimped paper and metal wrinkled paper, dress outside crimped paper insulation to respective electrode shield diameter at described lead-in wire, place plain conductor, add gold filled and belong to the metal wrinkled paper in facing half repeatedly one deck, the additional bag crimped paper of metal wrinkled paper is to relevant voltage grade insulation thickness; Plain conductor is connected with lead-in wire, becomes equipotential line.
2. shielding body according to claim 1, is characterized in that, described plain conductor is copper strap wire, is surrounded with aluminum foil strip.
3. shielding body according to claim 1, is characterized in that, described plain conductor and lead-in wire Cold welding.
4. shielding body according to claim 3, is characterized in that, plain conductor crimps with cold-pressed joint together with lead-in wire.
5. shielding body according to claim 4, is characterized in that, the cold-pressed joint aluminium foil after crimping shields.
6. shielding body according to claim 1, is characterized in that, metal wrinkled paper is wrapped up from distance of wire root 20mm place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427249.6U CN204242783U (en) | 2014-07-31 | 2014-07-31 | A kind of shielding body of high voltage transformer tap lead wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427249.6U CN204242783U (en) | 2014-07-31 | 2014-07-31 | A kind of shielding body of high voltage transformer tap lead wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204242783U true CN204242783U (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420427249.6U Expired - Fee Related CN204242783U (en) | 2014-07-31 | 2014-07-31 | A kind of shielding body of high voltage transformer tap lead wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204242783U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104916413A (en) * | 2015-06-05 | 2015-09-16 | 卧龙电气集团股份有限公司 | AT power supply 330 kV traction transformer lead capacitive shielding structure |
| CN105304294A (en) * | 2015-11-16 | 2016-02-03 | 西北核技术研究所 | Primary coil shielding structure for Tesla transformer |
-
2014
- 2014-07-31 CN CN201420427249.6U patent/CN204242783U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104916413A (en) * | 2015-06-05 | 2015-09-16 | 卧龙电气集团股份有限公司 | AT power supply 330 kV traction transformer lead capacitive shielding structure |
| CN105304294A (en) * | 2015-11-16 | 2016-02-03 | 西北核技术研究所 | Primary coil shielding structure for Tesla 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: 20150401 Termination date: 20200731 |
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| CF01 | Termination of patent right due to non-payment of annual fee |