CN104144600B - A kind of shading ring and shielding construction and casting type voltage mutual inductor - Google Patents

A kind of shading ring and shielding construction and casting type voltage mutual inductor Download PDF

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Publication number
CN104144600B
CN104144600B CN201310361404.9A CN201310361404A CN104144600B CN 104144600 B CN104144600 B CN 104144600B CN 201310361404 A CN201310361404 A CN 201310361404A CN 104144600 B CN104144600 B CN 104144600B
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China
Prior art keywords
cushion rubber
shading ring
winding
type voltage
crimped paper
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CN201310361404.9A
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Chinese (zh)
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CN104144600A (en
Inventor
李阳
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
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Priority to CN201310361404.9A priority Critical patent/CN104144600B/en
Publication of CN104144600A publication Critical patent/CN104144600A/en
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Abstract

The invention discloses a kind of shading ring and shielding construction and casting type voltage mutual inductor, shading ring includes cushion rubber and the screen layer formed by semiconductive crimped paper is provided with the side face of cushion rubber;Because semiconductive crimped paper is high-resistance conductor, shield effectiveness can be reached, shading ring is provided with elastically-deformable ability using cushion rubber, on the one hand when in use, make use of the flexible fastening of itself in shielded body;On the other hand when being used in casting type voltage mutual inductor, elastic shrinkage can occur with the cooling meat of pour mass, shield effectiveness will not be impacted, also not interfere with casting quality.

Description

A kind of shading ring and shielding construction and casting type voltage mutual inductor
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 first winding end of the casting type voltage mutual inductor used in high-voltage electric power system unshielded knot mostly Structure, this results in first winding Analysis of End Electric Field concentration, and after pouring into a mould finished product, shelf depreciation value is bigger than normal, and product cast qualification rate is inclined It is low;Some producers attempt to install the shading ring of metal additional in first winding end before cast, but because of the shrinkage and epoxy of metal Shrinkage when resin cools down is inconsistent, and the irregular deformation of metallic shield ring is caused when being cooled down after product cast or produces air gap Or product cracking, product still suffer from the problem of pouring into a mould low qualified.
The content of the invention
It can solve the problem that what casting type voltage mutual inductor first winding Analysis of End Electric Field was concentrated it is an object of the invention to provide a kind of Shading ring;Invention also provides the shielding construction and casting type voltage mutual inductor using this shading ring.
To achieve the above object, the present invention uses following technical scheme:
A kind of shading ring, including cushion rubber, the side face of the cushion rubber are provided with the screen layer formed by semiconductive crimped paper.
The semiconductive crimped paper half lap is wrapped on the cushion rubber.
The cushion rubber is ethylene-propylene-diene monomer cushion rubber.
A kind of shielding construction, including shielded body and the shading ring being arranged on shielded body corresponding position, the shielding Ring includes cushion rubber, and the side face of the cushion rubber is provided with the screen layer formed by semiconductive crimped paper, and the shielding hoop is shielding On body.
The semiconductive crimped paper half lap is wrapped on the cushion rubber.
The cushion rubber is ethylene-propylene-diene monomer cushion rubber.
A kind of casting type voltage mutual inductor, including first winding, the outer rounded ends of the first winding are provided with shading ring, institute Stating shading ring includes cushion rubber, and the side face of the cushion rubber is provided with the screen layer formed by semiconductive crimped paper, the shielding hoop In first winding.
The semiconductive crimped paper half lap is wrapped on cushion rubber.
The cushion rubber is ethylene-propylene-diene monomer cushion rubber.
The shading ring is by conductive adhesive in first winding.
The shading ring of the present invention includes cushion rubber and the screen layer formed by semiconductive crimped paper is provided with the side face of cushion rubber; Because semiconductive crimped paper is high-resistance conductor, shield effectiveness can be reached, shading ring is provided with elastic deformation using cushion rubber Ability, on the one hand when in use, make use of the flexible fastening of itself in shielded body;On the other hand work as and be used in cast When in formula voltage transformer, elastic shrinkage can occur with the cooling meat of pour mass, shadow will not be caused to shield effectiveness Ring, also do not interfere with casting quality.
The casting type voltage mutual inductor of the present invention by cushion rubber and is located at cushion rubber week in the cylindrical end set of first winding The shading ring that semiconductive crimped paper on face is formed, semiconductive crimped paper can play shield effectiveness, improve first winding end The situation that electric field is concentrated, while the use of cushion rubber makes shading ring also produce elastic shrinkage during pour mass cooling meat, keeps away Exempt from the situation that pour mass produces air gap or cracking, improve cast qualification rate.
Further, the cushion rubber in the present invention uses ethylene-propylene-diene monomer cushion rubber, can make cushion rubber in casting type voltage mutual inductor It is consistent with the shrinkage of epoxy resin during cast cooling, casting quality and shield effectiveness are preferably ensured, and pass through conduction Glue is bonded, and preferably semiconductive crimped paper can be fixed in first winding.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the casting type voltage mutual inductor of the present invention;
Fig. 2 is Fig. 1 left view;
Fig. 3 is the enlarged drawing at A in Fig. 1;
Fig. 4 is the structural representation of cushion rubber in Fig. 1.
Embodiment
The embodiment of the casting type voltage mutual inductor of the present invention, as Figure 1-4, casting type voltage mutual inductor include annular Iron core 1 and the first winding 2 that is wound on 1 upside stem unshakable in one's determination, the cylindrical both ends of first winding 2 are equipped with shading ring, shielded Covering ring includes cushion rubber 3 of the section for circle, and 3 outer half lap of cushion rubber is wound with semiconductive crimped paper 4, and cushion rubber 3 is ethylene propylene diene rubber Material, its internal diameter are less than first winding external diameter 2mm;Shading ring conductive adhesive is protected in 2 outer rounded ends of first winding, conducting resinl Being reliably connected between cushion rubber 3 and first winding 2 is demonstrate,proved.
The casting type voltage mutual inductor of above-described embodiment shading ring in 2 cylindrical end set of first winding, shading ring Semiconductive crimped paper 4 has high resistance, can realize shield effectiveness, can improve the distribution of the Analysis of End Electric Field of first winding 2;And shield The cushion rubber 3 of ring has preferably elasticity, and the internal diameter of cushion rubber 3 is less than the external diameter of first winding 2, can will partly be led by elastic deformation Electric crimped paper 4 is fixed on the outer rounded ends of first winding 2, while shrinkage is consistent when cushion rubber 3 cools down with epoxy resin, is avoided that Plastic deformation occurs when pouring into a mould and cooling down or produces the situation of air gap or product cracking, and conducting resinl further ensures cushion rubber 3 Being reliably connected between first winding 2, casting type voltage mutual inductor of the invention can improve the electric field point of the end of first winding 2 Cloth, so as to improve the qualification rate of product cast.
The structure and the structure phase of the shading ring of the casting type voltage mutual inductor in above-described embodiment of the shading ring of the present invention Together, not repeat herein.
The embodiment of the shielding construction of the present invention, including shielded body and the shading ring for being located at shielded body corresponding position, Shading ring includes section and is wound with semiconductive crimped paper 4 for circular cushion rubber 3,3 outer half lap of cushion rubber, and cushion rubber 3 is ethylene-propylene-diene monomer Glue material, its internal diameter are less than shielded body external diameter;Shading ring conductive adhesive is in shielded body.
The above embodiment of the present invention employs section as circular cushion rubber, certainly in other embodiments of the invention Section can be used as semicircular rubber parts;In addition, the cushion rubber of the above embodiment of the present invention uses ethylene propylene diene monomer (EPDM) material, Certainly cushion rubber can also use other second third or styrene-butadiene rubber in other embodiments of the invention;In addition, the present invention In above-described embodiment, semiconductive crimped paper half lap is wrapped on the side face of cushion rubber, certainly, in other embodiments of the invention, Semiconductive crimped paper, which can also be segmented, to be surrounded on cushion rubber;In addition, the above embodiment of the present invention employs conducting resinl to shielding Ring is adhesively fixed, and certainly, in other embodiments of the invention, shading ring can also be bound round in shielded body, work as tensioning Power can be no longer bonded when reaching requirement.

Claims (7)

  1. A kind of 1. shading ring, it is characterised in that:Including cushion rubber, the side face of the cushion rubber is provided with what is formed by semiconductive crimped paper Screen layer, the semiconductive crimped paper half lap are wrapped on the cushion rubber, and the shielding hoop is in the cast-type electricity being adapted to it The outer rounded ends of the first winding of transformer are pressed, cushion rubber enables shading ring that elastic receipts occur with the cooling meat of pour mass Contracting.
  2. 2. shading ring according to claim 1, it is characterised in that:The cushion rubber is ethylene-propylene-diene monomer cushion rubber.
  3. 3. a kind of shielding construction, including shielded body and the shading ring that is arranged on shielded body corresponding position, it is characterised in that: The shading ring includes cushion rubber, and the side face of the cushion rubber is provided with the screen layer formed by semiconductive crimped paper, the semiconductive Crimped paper half lap is wrapped on the cushion rubber, and for the shielding hoop in shielded body, the shielded body is cast-type voltage The first winding of transformer, the shading ring are located at the outer rounded ends of first winding, and cushion rubber enables shading ring with pour mass Cooling meat and elastic shrinkage occurs.
  4. 4. shielding construction according to claim 3, it is characterised in that:The cushion rubber is ethylene-propylene-diene monomer cushion rubber.
  5. 5. a kind of casting type voltage mutual inductor, including first winding, it is characterised in that:The outer rounded ends of the first winding are provided with Shading ring, the shading ring include cushion rubber, and the side face of the cushion rubber is provided with the screen layer formed by semiconductive crimped paper, described Semiconductive crimped paper half lap is wrapped on cushion rubber, and for the shielding hoop in first winding, cushion rubber enables shading ring with pouring The cooling meat of injection body and elastic shrinkage occurs.
  6. 6. casting type voltage mutual inductor according to claim 5, it is characterised in that:The cushion rubber is ethylene propylene diene rubber Circle.
  7. 7. the casting type voltage mutual inductor according to claim 5 or 6, it is characterised in that:The shading ring is by conductive gluing It is connected in first winding.
CN201310361404.9A 2013-08-19 2013-08-19 A kind of shading ring and shielding construction and casting type voltage mutual inductor Active CN104144600B (en)

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

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CN104144600A CN104144600A (en) 2014-11-12
CN104144600B true CN104144600B (en) 2017-12-08

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106925724B (en) * 2015-12-31 2018-11-30 中核北方核燃料元件有限公司 A kind of depleted uranium shielding's 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101136281B (en) * 2006-08-28 2011-10-26 Abb技术有限公司 High voltage transformer with a shield ring, a shield ring and a method of manufacture same
CN102064011B (en) * 2010-11-05 2012-05-30 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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