CN104144600A - Shielding ring, shielding structure and poured voltage transformer - Google Patents
Shielding ring, shielding structure and poured voltage transformer Download PDFInfo
- Publication number
- CN104144600A CN104144600A CN201310361404.9A CN201310361404A CN104144600A CN 104144600 A CN104144600 A CN 104144600A CN 201310361404 A CN201310361404 A CN 201310361404A CN 104144600 A CN104144600 A CN 104144600A
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- cushion rubber
- shielding
- shading ring
- winding
- crimped paper
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Abstract
The invention discloses a shielding ring, a shielding structure and a poured voltage transformer. The shielding ring comprises a rubber ring body and a shielding layer, wherein the shielding layer is arranged on the circumferential surface of the rubber ring body and formed by semiconductive crepe paper. Due to the fact that the semiconductive crepe paper serves as a high-resistance conductor, the shielding effect can be obtained. By means of the rubber ring body, the shielding ring has elastic deformation capacity. When being used, the shielding ring can be fixed to a body to be shielded through self elasticity. When being applied to the poured voltage transformer, the shielding ring can elastically contract along with cooling contraction of a poured body. Thus, the shielding effect cannot be affected, and the pouring quality cannot be affected.
Description
Technical field
The present invention relates to a kind of shading ring and shielding construction and casting type voltage mutual inductor.
Background technology
At present, the most unshielded structure of a winding overhang of the casting type voltage mutual inductor using in high-voltage electric power system, this just causes a winding overhang electric field to concentrate, and after cast finished product, partial discharge value is bigger than normal, product cast low qualified; Some producers attempts before cast installing additional in winding overhang the shading ring of metal, but because of the shrinkage of metal and the shrinkage of epoxy resin when cooling inconsistent, when cooling after product cast, causing the irregular deformation of metallic shield ring or produce air gap or product cracking, still there is the problem of cast low qualified in product.
Summary of the invention
The object of this invention is to provide and a kind ofly can solve concentrated shading ring of winding overhang electric field of casting type voltage mutual inductor; The present invention provides shielding construction and the casting type voltage mutual inductor that uses this shading ring simultaneously.
For achieving the above object, the present invention is by the following technical solutions:
A shading ring, comprises cushion rubber, and the side face of described cushion rubber is provided with the screen being formed by semiconductive crimped paper.
Described semiconductive crimped paper half lap is wrapped on described cushion rubber.
Described cushion rubber is ethylene-propylene-diene monomer cushion rubber.
A shielding construction, comprises conductively-closed body and is arranged on the shading ring on conductively-closed body corresponding position, described shading ring comprises cushion rubber, and the side face of described cushion rubber is provided with the screen being formed by semiconductive crimped paper, and described shielding hoop is on shield.
Described semiconductive crimped paper half lap is wrapped on described cushion rubber.
Described cushion rubber is ethylene-propylene-diene monomer cushion rubber.
A casting type voltage mutual inductor, comprises winding one time, and the outer rounded ends of a described winding is provided with shading ring, and described shading ring comprises cushion rubber, and the side face of described cushion rubber is provided with the screen being formed by semiconductive crimped paper, and described shielding hoop is on a winding.
Described semiconductive crimped paper half lap is wrapped on cushion rubber.
Described cushion rubber is ethylene-propylene-diene monomer cushion rubber.
Described shading ring by conductive adhesive on a winding.
Shading ring of the present invention comprises cushion rubber and on the side face of cushion rubber, is provided with the screen being formed by semiconductive crimped paper; Because semiconductive crimped paper is high-resistance conductor, can reach shield effectiveness, adopt cushion rubber to make shading ring there is elastically-deformable ability, on the one hand in use, utilized the flexible fastening of itself on conductively-closed body; In the time of on the other hand in being used in casting type voltage mutual inductor, can there is elastic shrinkage along with the cooling contraction of pour mass, can not impact shield effectiveness, also can not affect casting quality.
Casting type voltage mutual inductor of the present invention is provided with by cushion rubber and is located at the shading ring that the semiconductive crimped paper on cushion rubber side face forms in the outer rounded ends of a winding, semiconductive crimped paper can play shield effectiveness, improved the concentrated situation of winding overhang electric field one time, the use of cushion rubber simultaneously makes shading ring also produce elastic shrinkage in the cooling contraction process of pour mass, avoid pour mass to produce the situation of air gap or cracking, improved cast qualification rate.
Further, cushion rubber in the present invention adopts ethylene-propylene-diene monomer cushion rubber, can make cushion rubber pour into a mould when cooling consistent with the shrinkage of epoxy resin at casting type voltage mutual inductor, casting quality and shield effectiveness have better been ensured, and by conducting resinl, undertaken bondingly, semiconductive crimped paper can better be fixed on a winding.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of casting type voltage mutual inductor of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the enlarged drawing at A place in Fig. 1;
Fig. 4 is the structural representation of cushion rubber in Fig. 1.
Embodiment
The embodiment of casting type voltage mutual inductor of the present invention, as Figure 1-4, casting type voltage mutual inductor comprises annular iron core 1 and is wound on a winding 2 on 1 upside stem unshakable in one's determination, the two ends of winding 2 cylindricals are equipped with shading ring, shading ring comprises that cross section is circular cushion rubber 3, the outer half lap of cushion rubber 3 is wound with semiconductive crimped paper 4, and cushion rubber 3 is ethylene propylene diene monomer (EPDM) material, and its internal diameter is less than winding external diameter 2mm one time; Shading ring is with conductive adhesive an outer rounded ends of winding 2, and conducting resinl has guaranteed reliable connection the between cushion rubber 3 and a winding 2.
The casting type voltage mutual inductor of above-described embodiment is provided with shading ring an outer rounded ends of winding 2, and the semiconductive crimped paper 4 of shading ring has high resistance, can realize shield effectiveness, can improve the distribution of winding 2 Analysis of End Electric Fields, and the cushion rubber 3 of shading ring has good elasticity, and cushion rubber 3 internal diameters are less than winding 2 external diameters one time, can semiconductive crimped paper 4 be fixed on by elastic deformation to the outer rounded ends of a winding 2, when cushion rubber 3 is cooling with epoxy resin simultaneously, shrinkage is consistent, can avoid plastic deformation occurring when cast is cooling or producing air gap or the situation of product cracking, and conducting resinl has further guaranteed reliable connection the between cushion rubber 3 and winding 2, casting type voltage mutual inductor of the present invention can improve the Electric Field Distribution of winding 2 ends, thereby improved the qualification rate of product cast.
The structure of shading ring of the present invention is identical with the structure of the shading ring of casting type voltage mutual inductor in above-described embodiment, will not repeat herein.
The embodiment of shielding construction of the present invention, comprise conductively-closed body and the shading ring that is located at conductively-closed body corresponding position, shading ring comprises that cross section is circular cushion rubber 3, and the outer half lap of cushion rubber 3 is wound with semiconductive crimped paper 4, cushion rubber 3 is ethylene propylene diene monomer (EPDM) material, and its internal diameter is less than conductively-closed body diameter; Shading ring uses conductive adhesive on conductively-closed body.
It is circular cushion rubber that the above embodiment of the present invention has adopted cross section, and certainly also can adopt in other embodiments of the invention cross section is semicircular rubber parts; In addition, the cushion rubber of the above embodiment of the present invention adopts ethylene propylene diene monomer (EPDM) material, and cushion rubber also can adopt other second third or styrene-butadiene rubbers in other embodiments of the invention certainly; In addition, in the above embodiment of the present invention, semiconductive crimped paper half lap is wrapped on the side face of cushion rubber, certainly, in other embodiments of the invention, semiconductive crimped paper also can fragmented packets on cushion rubber; In addition, the above embodiment of the present invention has adopted conducting resinl to be adhesively fixed to shading ring, and certainly, in other embodiments of the invention, shading ring also can bind round on conductively-closed body, can no longer carry out bonding when tensile force reaches requirement.
Claims (10)
1. a shading ring, is characterized in that: comprise cushion rubber, the side face of described cushion rubber is provided with the screen being formed by semiconductive crimped paper.
2. shading ring according to claim 1, is characterized in that: described semiconductive crimped paper half lap is wrapped on described cushion rubber.
3. shading ring according to claim 1 and 2, is characterized in that: described cushion rubber is ethylene-propylene-diene monomer cushion rubber.
4. a shielding construction, comprise conductively-closed body and be arranged on the shading ring on conductively-closed body corresponding position, it is characterized in that: described shading ring comprises cushion rubber, the side face of described cushion rubber is provided with the screen being formed by semiconductive crimped paper, and described shielding hoop is on shield.
5. shielding construction according to claim 4, is characterized in that: described semiconductive crimped paper half lap is wrapped on described cushion rubber.
6. according to the shielding construction described in claim 4 or 5, it is characterized in that: described cushion rubber is ethylene-propylene-diene monomer cushion rubber.
7. a casting type voltage mutual inductor, comprise winding one time, it is characterized in that: the outer rounded ends of a described winding is provided with shading ring, and described shading ring comprises cushion rubber, the side face of described cushion rubber is provided with the screen being formed by semiconductive crimped paper, and described shielding hoop is on a winding.
8. casting type voltage mutual inductor according to claim 7, is characterized in that: described semiconductive crimped paper half lap is wrapped on cushion rubber.
9. casting type voltage mutual inductor according to claim 8, is characterized in that: described cushion rubber is ethylene-propylene-diene monomer cushion rubber.
10. according to the casting type voltage mutual inductor described in claim 7 or 8 or 9, it is characterized in that: described shading ring by conductive adhesive on a winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361404.9A CN104144600B (en) | 2013-08-19 | 2013-08-19 | A kind of shading ring and shielding construction and casting type voltage mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361404.9A CN104144600B (en) | 2013-08-19 | 2013-08-19 | A kind of shading ring and shielding construction and casting type voltage mutual inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104144600A true CN104144600A (en) | 2014-11-12 |
| CN104144600B CN104144600B (en) | 2017-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310361404.9A Expired - Fee Related CN104144600B (en) | 2013-08-19 | 2013-08-19 | A kind of shading ring and shielding construction and casting type voltage mutual inductor |
Country Status (1)
| Country | Link |
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| CN (1) | CN104144600B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023746A (en) * | 2015-07-29 | 2015-11-04 | 厦门大一互科技有限公司 | Internal field intensity balancing method for medium-voltage mutual inductor |
| CN106925724A (en) * | 2015-12-31 | 2017-07-07 | 中核北方核燃料元件有限公司 | A kind of depleted uranium shielding body casting method of Stainless Steel Shell |
| CN107808763A (en) * | 2017-11-29 | 2018-03-16 | 大连北方互感器集团有限公司 | Voltage transformer primary winding high-tension shielding apparatus and preparation method thereof |
| CN110444377A (en) * | 2019-09-09 | 2019-11-12 | 大连北方互感器集团有限公司 | A kind of voltage transformer primary coil high-tension shielding apparatus and preparation method thereof |
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| US20100007452A1 (en) * | 2006-08-28 | 2010-01-14 | Abb Technology Ltd. | High voltage transformer with a shield ring. a shield ring and a method of manufacture same |
| CN201601013U (en) * | 2009-11-26 | 2010-10-06 | 平高集团有限公司 | Voltage transformer and shielding case thereof |
| CN201741564U (en) * | 2010-07-20 | 2011-02-09 | 湖北大二互科技有限公司 | Epoxy-resin vacuum-pouring dry-type current transformer |
| CN102064011A (en) * | 2010-11-05 | 2011-05-18 | 宁波三爱互感器有限公司 | Voltage transformer |
| CN202796409U (en) * | 2012-07-20 | 2013-03-13 | 大连第一互感器有限责任公司 | Dry type voltage transformer for switchgears |
| CN203013493U (en) * | 2012-09-17 | 2013-06-19 | 熊江咏 | Electronic voltage transformer for high-voltage cubicle type gas insulated switchgear |
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2013
- 2013-08-19 CN CN201310361404.9A patent/CN104144600B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100007452A1 (en) * | 2006-08-28 | 2010-01-14 | Abb Technology Ltd. | High voltage transformer with a shield ring. a shield ring and a method of manufacture same |
| CN201601013U (en) * | 2009-11-26 | 2010-10-06 | 平高集团有限公司 | Voltage transformer and shielding case thereof |
| CN201741564U (en) * | 2010-07-20 | 2011-02-09 | 湖北大二互科技有限公司 | Epoxy-resin vacuum-pouring dry-type current transformer |
| CN102064011A (en) * | 2010-11-05 | 2011-05-18 | 宁波三爱互感器有限公司 | Voltage transformer |
| CN202796409U (en) * | 2012-07-20 | 2013-03-13 | 大连第一互感器有限责任公司 | Dry type voltage transformer for switchgears |
| CN203013493U (en) * | 2012-09-17 | 2013-06-19 | 熊江咏 | Electronic voltage transformer for high-voltage cubicle type gas insulated switchgear |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023746A (en) * | 2015-07-29 | 2015-11-04 | 厦门大一互科技有限公司 | Internal field intensity balancing method for medium-voltage mutual inductor |
| CN105023746B (en) * | 2015-07-29 | 2020-03-27 | 厦门大一互科技有限公司 | Method for equalizing field intensity in medium-voltage transformer |
| CN106925724A (en) * | 2015-12-31 | 2017-07-07 | 中核北方核燃料元件有限公司 | A kind of depleted uranium shielding body casting method of Stainless Steel Shell |
| CN107808763A (en) * | 2017-11-29 | 2018-03-16 | 大连北方互感器集团有限公司 | Voltage transformer primary winding high-tension shielding apparatus and preparation method thereof |
| CN110444377A (en) * | 2019-09-09 | 2019-11-12 | 大连北方互感器集团有限公司 | A kind of voltage transformer primary coil high-tension shielding apparatus and preparation method thereof |
| CN110444377B (en) * | 2019-09-09 | 2024-04-23 | 大连北方互感器集团有限公司 | Primary coil high-voltage shielding device of voltage transformer and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104144600B (en) | 2017-12-08 |
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Granted publication date: 20171208 |