CN203055637U - Insulation structure of end portion of transformer coil - Google Patents

Insulation structure of end portion of transformer coil Download PDF

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Publication number
CN203055637U
CN203055637U CN 201220722705 CN201220722705U CN203055637U CN 203055637 U CN203055637 U CN 203055637U CN 201220722705 CN201220722705 CN 201220722705 CN 201220722705 U CN201220722705 U CN 201220722705U CN 203055637 U CN203055637 U CN 203055637U
Authority
CN
China
Prior art keywords
electrostatic ring
insulation structure
transformer
transformer coil
end portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220722705
Other languages
Chinese (zh)
Inventor
金吉昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Wuzhou Electric Power Technology Co., Ltd.
Original Assignee
BAODING TIANWEI GROUP (JIANGSU) WUZHOU TRANSFORMER Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BAODING TIANWEI GROUP (JIANGSU) WUZHOU TRANSFORMER Co Ltd filed Critical BAODING TIANWEI GROUP (JIANGSU) WUZHOU TRANSFORMER Co Ltd
Priority to CN 201220722705 priority Critical patent/CN203055637U/en
Application granted granted Critical
Publication of CN203055637U publication Critical patent/CN203055637U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an insulation structure of an end portion of a transformer coil. The insulation structure of the end portion of the transformer coil comprises a voltage-sharing electrostatic ring, wherein the end portion of the voltage-sharing electrostatic ring is a smooth arc connecting segment. An insulation cushion block is arranged above the linear segment of the voltage-sharing electrostatic ring, and the outer end of the insulation cushion block does not stretch out of the linear segment of the voltage-sharing electrostatic ring. The insulation structure of the end portion of the transformer coil has the advantage of improving the insulation reliability of a whole transformer.

Description

A kind of transformer coil overhang insulation structure
Technical field
The utility model relates to a kind of transformer coil overhang insulation structure.
Background technology
At present, the overhang insulation structure that high-power transformer such as voltage are higher than 110KV grade power transformer winding is: as shown in Figure 1, the end of all pressing electrostatic ring 21 is smooth circular arc linkage section 31, all press straightway 41 tops of electrostatic ring 21 to be provided with cross-over block 11, the outer end of cross-over block 11 extends through the top that is positioned at circular arc linkage section 31 behind the straightway 41 of all pressing electrostatic ring 21, makes cross-over block 11 and all press between the circular arc linkage section 31 of electrostatic ring 21 and form " wedge shape " gap.After the transformer that has above-mentioned transformer coil overhang insulation structure is positioned in the oil tank of transformer that transformer oil 51 is housed, since in " wedge shape " gap always because of multiple former thereby have air or a bubble, make the bottom of cross-over block 11 and all press between the circular arc linkage section 31 of electrostatic ring 21 and can form " oil film wedge ", be that transformer oil 51 soaks in not saturating " wedge shape " gap, will make maximum field strength appear at " oil film wedge " zone like this, make the incipient discharge voltage of " oil film wedge " regional partial discharge be lower than other regional incipient discharge voltage, partial discharge phenomenon just easily takes place in " oil film wedge " zone, thereby has reduced the insulation property of whole transformer.
The utility model content
The purpose of this utility model provides a kind of a kind of transformer coil overhang insulation structure that can improve the insulating reliability of whole transformer.
For achieving the above object, the utility model has adopted following technical scheme: described a kind of transformer coil overhang insulation structure, comprise: the end is all pressures electrostatic ring of smooth circular arc linkage section, all press the straightway top of electrostatic ring to be provided with cross-over block, the outer end of cross-over block does not extend through outside the straightway of all pressing electrostatic ring.
Further, aforesaid a kind of transformer coil overhang insulation structure, wherein: the outer end of cross-over block just in time flushes with the outside of the straightway of all pressing electrostatic ring.
By the enforcement of technique scheme, the utlity model has the advantage of the insulating reliability that can improve whole transformer.
Description of drawings
Fig. 1 is the structural representation of the transformer coil overhang insulation structure described in the background technology.
Fig. 2 is the structural representation of a kind of transformer coil overhang insulation structure described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, described a kind of transformer coil overhang insulation structure, comprise: the end is all pressures electrostatic ring 2 of smooth circular arc linkage section 3, all presses straightway 4 tops of electrostatic ring 2 to be provided with cross-over block 1, and the outer end of cross-over block 1 does not extend through outside the straightway 4 of all pressing electrostatic ring 2; In the present embodiment, the outer end of cross-over block 1 just in time flushes with the outside of the straightway 4 of all pressing electrostatic ring 2.Cross-over block 1 and all press between the circular arc linkage section 3 of electrostatic ring 2 and can not form " wedge shape " gap like this, after the transformer that has transformer coil overhang insulation structure described in the utility model is positioned in the oil tank of transformer that transformer oil 5 is housed, the bottom of cross-over block 1 and all press between the circular arc linkage section 3 of electrostatic ring 2 and can not form " oil film wedge ", so just avoided making this place's electric field strength become big phenomenon owing to transformer oil 5 soaks not saturating " wedge shape " gap, and then improved the incipient discharge voltage of partial discharge of transformer, improved the insulating reliability of whole transformer.

Claims (2)

1. transformer coil overhang insulation structure, comprise: the end is all pressures electrostatic ring of smooth circular arc linkage section, all press the straightway top of electrostatic ring to be provided with cross-over block, it is characterized in that: the outer end of cross-over block does not extend through outside the straightway of all pressing electrostatic ring.
2. a kind of transformer coil overhang insulation structure according to claim 1, it is characterized in that: the outer end of cross-over block just in time flushes with the outside of the straightway of all pressing electrostatic ring.
CN 201220722705 2012-12-25 2012-12-25 Insulation structure of end portion of transformer coil Expired - Fee Related CN203055637U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220722705 CN203055637U (en) 2012-12-25 2012-12-25 Insulation structure of end portion of transformer coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220722705 CN203055637U (en) 2012-12-25 2012-12-25 Insulation structure of end portion of transformer coil

Publications (1)

Publication Number Publication Date
CN203055637U true CN203055637U (en) 2013-07-10

Family

ID=48738565

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220722705 Expired - Fee Related CN203055637U (en) 2012-12-25 2012-12-25 Insulation structure of end portion of transformer coil

Country Status (1)

Country Link
CN (1) CN203055637U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050250A (en) * 2012-12-25 2013-04-17 保定天威集团(江苏)五洲变压器有限公司 Coil end insulation structure of transformer
CN107170569A (en) * 2017-05-30 2017-09-15 闫会云 A kind of coil insulation structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050250A (en) * 2012-12-25 2013-04-17 保定天威集团(江苏)五洲变压器有限公司 Coil end insulation structure of transformer
CN107170569A (en) * 2017-05-30 2017-09-15 闫会云 A kind of coil insulation structure

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address

Address after: 215600 No. 5 Jing Dong Road, Zhangjiagang Economic Development Zone (South District), Suzhou, Jiangsu

Patentee after: Jiangsu Wuzhou Electric Power Technology Co., Ltd.

Address before: Suzhou City, Jiangsu province 215600 Zhangjiagang Economic Development Zone (yangshe Village Wang) Baoding Print-Rite group (Jiangsu) Co., Ltd. Wuzhou transformer

Patentee before: Baoding Tianwei Group (Jiangsu) Wuzhou Transformer Co., Ltd.

CP03 Change of name, title or address
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130710

Termination date: 20201225

CF01 Termination of patent right due to non-payment of annual fee