CN102842394B - Pot-type insulator - Google Patents
Pot-type insulator Download PDFInfo
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- CN102842394B CN102842394B CN201210300238.7A CN201210300238A CN102842394B CN 102842394 B CN102842394 B CN 102842394B CN 201210300238 A CN201210300238 A CN 201210300238A CN 102842394 B CN102842394 B CN 102842394B
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- 239000012212 insulator Substances 0.000 title claims abstract description 60
- 238000009413 insulation Methods 0.000 claims abstract description 43
- 230000005684 electric field Effects 0.000 claims abstract description 26
- 230000007704 transition Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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Abstract
The invention relates to a pot-type insulator, which comprises an insulation pouring body which is of a pot shape, wherein the inner wall of a pot body of the insulation pouring body is smoothly connected with correspondent surfaces of a pot edge and a pot bottom respectively through a first arc surface section and a second arc surface section, which are tangential with each other, the junction part of the pot body and the pot edge of the insulation pouring body is embedded with a shield ring which is coaxial with the insulation pouring body and used for improving the distribution of an electric field on the edge surface of the insulator, and the shape of the shield ring is consistent with the shape of a pot opening of the insulation pouring body; and on the longitudinal cross section of an axis of the insulator, a contour line of the first arc surface section is of an arc section, the cross section of a ring body of the shield ring is of a circular shape or an elliptic shape, a symmetric axis of the cross section of the shield ring body is overlapped with an angular bisector of a central angle corresponding to the arc section, and the distance from the center of the cross section of the shield ring body to the top surface of the insulation pouring body is not smaller than the minimal insulation distance. Due to adopting the pot-type insulator, the distribution of the electric field of the edge surface of the insulator can be well improved, the flashover can be prevented, and the application requirement of a high-voltage insulator can be met.
Description
Technical field
The present invention relates to high voltage switchgear technical field, particularly a kind of for the disc insulator in high voltage switchgear.
Background technology
For high voltage switchgear, the height of its electric pressure depends primarily on every electricity function index and the mechanical performance index of insulator, and electric pressure is higher, higher to the requirement of insulator.As the large-scale disc insulator of 1100kV GIS product, require that it has the insulation property under 1100 kV electric pressures, this having higher requirement along face Electric Field Distribution to disc insulator.
Document number is that the Chinese patent of CN 20153603.4 U discloses a kind of Novel basin-shaped insulator, this insulator comprises the insulation pouring body in peviform by poured with epoxy resin, insulation pouring body is formed by the bottom of basin edge, basin body and basin, wherein basin body is tapered, the internal face of basin body is smoothly connected respectively by corresponding the first tangent cambered surface section and the second cambered surface section with the respective surfaces at the bottom of basin edge and basin, at the bottom of the basin of insulation pouring body, be also provided with center conductor, center conductor is bonded together by cast and insulation pouring body.The disc insulator of this structure, in use because it easily causes insulator arc-over to discharge along face Electric Field Distribution inequality, at present, the method of the additional grading ring of usual employing improves the problem of Electric Field Distribution inequality, but the effect improved but has very large difference because the size of grading ring is different with installed position, this to improve insulator inapplicable for the disc insulator of such as 1100 kV voltage levels along the method for face Electric Field Distribution, can not meet the requirement of voltage levels.
Summary of the invention
The object of this invention is to provide and a kind ofly can improve insulator very well along face Electric Field Distribution to adapt to the disc insulator of electric field requirement under voltage levels.
For achieving the above object, the present invention adopts following technical scheme: a kind of disc insulator, comprise the insulation pouring body in peviform, the internal face of the basin body of insulation pouring body is smoothly connected respectively by corresponding the first tangent cambered surface section and the second cambered surface section with the respective surfaces at the bottom of basin edge and basin, the basin body of insulation pouring body and the connecting portion on basin edge be embedded with coaxial with insulation pouring body, for improving the shading ring of insulator along face Electric Field Distribution, the shape of this shading ring is consistent with the basin mouth-shaped of insulation pouring body; On the longitudinal section crossing axis of insulator, the outline line of described first cambered surface section is arc section, the ring body section of shading ring is rounded or oval, the angular bisector of the central angle that the symmetry axis of shading ring ring body section is corresponding with described arc section overlaps, and the distance between the center of shading ring ring body section and insulation pouring body end face is not less than minimum insulation distance.
The ring body section of described shading ring is in the sector region that surrounded by the radius at described arc section and these arc section two ends.
The outline line of described shading ring ring body section and the radius at described arc section two ends tangent.
The ring body of described shading ring is provided with for conducting electricity the conduction connection cylinder connecting outward flange.
The internal face of the basin body of described insulation pouring body is made up of upper and lower two conical surface sections and the transition circle cambered surface section being smoothly connected this two conical surfaces section, the two ends of this transition circle cambered surface section are corresponding tangent with upper and lower conical surface section, upper conical surface section is connected with the first described cambered surface section, lower conical surface section is connected with the second described cambered surface section, and the taper angle of upper conical surface section is less than the taper angle of lower conical surface section.
The present invention is by burying shading ring at insulation pouring body basin body and basin underground along connecting portion, and the symmetry axis of the circle of shading ring or vesica piscis body section overlaps with described angular bisector, make shading ring ring body equal with the distance at described arc section two ends, thus ensure that shading ring along face and insulator basically identical along face direction of an electric field, improve insulator dramatically along face Electric Field Distribution situation, and when introducing shading ring in other positions, then cannot realize shading ring and the insulator consistency along face direction of an electric field, and then affect electric field and improve effect.
Based on Theory of Electromagnetic Field and utilize software to 1100kV disc insulator do not install shading ring and install difformity size shading ring time surface electric field intensity distribution and calculate along path Electric Field Distribution, account form is: simulate on the circular cylinder body that to be installed on by insulator with center conductor, carry out modeling, at " the SF that in January, 2010 publishes
6high-Voltage Electrical Appliances " (Li Binzhu) the 56th page the table 6-1 field intensity design basis value of table 4-1 and the 82nd page in choose criterion, carry out analysis of electric field calculating.Shading ring is not installed and the results are shown in following table with the electric Field Calculation of installing shading ring in position of the present invention:
Result shows: after shading ring is introduced in position of the present invention, improve the situation of disc insulator along face non-uniform electric, disc insulator is only 10.056kV/mm along face electric field strength, far below the level of disc insulator 12 kV/mm in the past, effectively reduce insulator surrounding electric field intensity, thus suppress flashover and the generation punctured, increase substantially the insulation property of disc insulator.By test, the electrical property of this large-scale disc insulator is by resistance to 1270 kV/1min of AC power frequency, lightning impulse withstand voltage 2800 kV (1.2/50 μ s peak value), and office puts and is reduced to below 1pC by original General Requirement 3 below pC.In addition, because shading ring is arranged near flange, peripheral foreign matter switch middle cylinder body equipotential being put to possibility guiding discharge also serves good shield effectiveness, ensure that the insulation property of insulating part.
The present invention, by after tangent for the radius at the outline line of shading ring ring body section and described arc section two ends, can ensure that the electric field in described sector region is evenly reducing along on fan-shaped radial direction, thus prevent distortion.
In the present invention, the basin body of insulation pouring body adopts and to be smoothly transitted the constituted mode be connected by two conical surface sections and a tangent transition circle cambered surface section, so both can ensure that insulator had gentle incline, and diameter and the height of insulator can have been reduced again, make the structure of insulator compacter; Further, can also ensure under the prerequisite not reducing hydraulic pressure breakdown strength, the thickness of corresponding reduction insulation pouring body, realize the miniaturization of the large-scale disc insulator of voltage levels, lightweight, the object that reduces costs.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the partial schematic diagram of shading ring in Fig. 1;
Fig. 3 is the partial sectional view that in Fig. 1, shading ring conduction connects cylinder place.
Embodiment
The embodiment of disc insulator provided by the invention is shown in shown in Fig. 1-Fig. 3, it comprises by the bottom of basin 13, the insulation pouring body 1 in peviform that basin body 11 and basin are formed along 12, at the bottom of the basin of insulation pouring body, 13 are provided with by the cast center conductor 2 that formation one is overall with it, the internal face of the basin body 11 of insulation pouring body and basin at the bottom of 12 and basin 13 respective surfaces connect respectively by corresponding the first tangent cambered surface section ab and the second cambered surface section ef, first cambered surface section is arc surface section, the internal face of described basin body 11 is by upper, lower two conical surface section bc, de forms with the transition circle cambered surface section cd being connected this two conical surfaces section, the two ends of this transition circle cambered surface section cd and upper, lower conical surface section correspondence is tangent, upper conical surface section bc is smoothly connected by the first cambered surface section ab all tangent with both with the corresponding surface on basin edge, lower conical surface section de is smoothly connected by the second all tangent with it cambered surface section ef with the corresponding surface at the bottom of basin, and the taper angle of upper conical surface section bc is less than the taper angle of lower conical surface section de.
In the present embodiment, also be embedded with for improving insulator along face Electric Field Distribution, the shading ring 3 reducing insulator surrounding electric field intensity at basin body 11 and the basin connecting portion along 12 of insulation pouring body, this shading ring 3 is coaxially arranged with insulation pouring body, and the shape of shading ring is consistent with the basin mouth-shaped of insulation pouring body, in the present embodiment, both shapes are circle; On the longitudinal section crossing axis of insulator, the outline line of the first cambered surface section ab is arc section, the ring body section of shading ring 3 is rounded, and the ring body section of shading ring 3 is in the sector region that surrounded by the radius oa at this arc section and arc section two ends and ob, point O is the center of circle of this arc section, and the outline line of the radius at these arc section two ends and shading ring ring body section is tangent; In addition, the distance h between the center of the ring body section of shading ring and insulation pouring body end face should be not less than minimum insulation distance, to prevent from puncturing.In addition, the ring body of shading ring is provided with for conducting electricity the conduction connection cylinder 31 connecting outward flange, the end face that conduction connects cylinder 31 extends radially outwardly into insulation pouring body basin along on the periphery of 12, the end face of conduction connection cylinder offers connecting hole 32, when assembling, be electrically connected by the outward flange of connector by shading ring and insulator, both realizations equipotential, because outward flange and cylindrical shell are assembled together, cylindrical shell ground connection, thus surrounding electric field intensity is being declined rapidly along fan-shaped radial direction.
Another embodiment of disc insulator provided by the invention, the difference of itself and above-described embodiment is: on the longitudinal section crossing axis of insulator, the ring body section oval in shape of shading ring, now oval symmetry axis needs to overlap with the angular bisector of the central angle corresponding to described arc section.
In other embodiments provided by the invention, on the longitudinal section crossing axis of insulator, the outline line of shading ring ring body section can not be tangent with the radius at described arc section two ends, but on the angular bisector being centrally located at central angle corresponding to described arc section of now ring body section, ring body section can be in described sector region, also can exceed described sector region, equally also can play and improve the effect of insulator along face Electric Field Distribution.
The structure of the various embodiments described above adopts when being particularly suitable for producing large-scale disc insulator, the middle-size and small-size disc insulator reducing insulator structure size is not needed for other, its basin body then can adopt existing basin body structure form, and the specific position of the insulation pouring body basin mouth only described in the above-described embodiments is buried shading ring underground and can be realized improving along face Electric Field Distribution, the object reducing field intensity around insulator.
Claims (6)
1. a disc insulator, comprise by the bottom of basin, basin body and basin be along the insulation pouring body in peviform formed, the internal face of the basin body of insulation pouring body is smoothly connected respectively by corresponding the first tangent cambered surface section and the second cambered surface section with the respective surfaces at the bottom of basin edge and basin, it is characterized in that: the basin body of insulation pouring body and the connecting portion on basin edge be embedded with coaxial with insulation pouring body, for improving the shading ring of insulator along face Electric Field Distribution, the shape of this shading ring is consistent with the basin mouth-shaped of insulation pouring body; On the longitudinal section crossing axis of insulator, the outline line of described first cambered surface section is arc section, the ring body section of shading ring is rounded or oval, the angular bisector of the central angle that the symmetry axis of shading ring ring body section is corresponding with described arc section overlaps, and the distance between the center of shading ring ring body section and insulation pouring body end face is not less than minimum insulation distance.
2. disc insulator according to claim 1, is characterized in that: the ring body section of described shading ring is in the sector region that surrounded by the radius at described arc section and these arc section two ends.
3. disc insulator according to claim 2, is characterized in that: the outline line of described shading ring ring body section and the radius at described arc section two ends tangent.
4. the disc insulator according to claim 1 or 2 or 3, is characterized in that: the ring body of described shading ring is provided with for conducting electricity the conduction connection cylinder connecting outward flange.
5. the disc insulator according to claim 1 or 2 or 3, it is characterized in that: the internal face of the basin body of described insulation pouring body is made up of upper and lower two conical surface sections and the transition circle cambered surface section being smoothly connected this two conical surfaces section, the two ends of this transition circle cambered surface section are corresponding tangent with upper and lower conical surface section, upper conical surface section is connected with the first described cambered surface section, lower conical surface section is connected with the second described cambered surface section, and the taper angle of upper conical surface section is less than the taper angle of lower conical surface section.
6. disc insulator according to claim 5, is characterized in that: the ring body of described shading ring is provided with for conducting electricity the conduction connection cylinder connecting outward flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210300238.7A CN102842394B (en) | 2012-08-22 | 2012-08-22 | Pot-type insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210300238.7A CN102842394B (en) | 2012-08-22 | 2012-08-22 | Pot-type insulator |
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| Publication Number | Publication Date |
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| CN102842394A CN102842394A (en) | 2012-12-26 |
| CN102842394B true CN102842394B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210300238.7A Active CN102842394B (en) | 2012-08-22 | 2012-08-22 | Pot-type insulator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456431B (en) * | 2013-01-24 | 2017-10-27 | 河南平高电气股份有限公司 | A kind of disc insulator and the high-voltage switch gear using the insulator |
| CN104992797B (en) * | 2015-06-30 | 2017-10-27 | 西北核技术研究所 | Coaxial transmission line high voltage isolation insulation |
| CN105486587A (en) * | 2015-11-18 | 2016-04-13 | 河南平高电气股份有限公司 | Basin-type insulator hydrostatic test tool and test cylinder thereof |
| CN107807316A (en) * | 2017-11-27 | 2018-03-16 | 清华四川能源互联网研究院 | Local discharge detection device and system |
| CN108320869A (en) * | 2018-02-01 | 2018-07-24 | 清华大学 | A kind of direct current disc insulator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387684A (en) * | 2008-10-28 | 2009-03-18 | 北京天一世纪科技有限公司 | Interior partial discharge detection device for gas insulation composite apparatus |
| CN201449826U (en) * | 2009-06-12 | 2010-05-05 | 中国西电电气股份有限公司 | Firm lightning arrester |
| CN102255258A (en) * | 2011-07-19 | 2011-11-23 | 沈阳华利能源设备制造有限公司 | 126-kV cabinet type gas-insulated metal-closed switching equipment |
| CN202133746U (en) * | 2011-06-09 | 2012-02-01 | 平高集团有限公司 | Insulation test device of ultra-high rod-type insulating part |
| CN202166716U (en) * | 2011-06-10 | 2012-03-14 | 平高集团有限公司 | Insulation test device used for superhigh voltage basin-type insulator |
| CN202720974U (en) * | 2012-08-22 | 2013-02-06 | 河南平高电气股份有限公司 | Disc insulator |
-
2012
- 2012-08-22 CN CN201210300238.7A patent/CN102842394B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387684A (en) * | 2008-10-28 | 2009-03-18 | 北京天一世纪科技有限公司 | Interior partial discharge detection device for gas insulation composite apparatus |
| CN201449826U (en) * | 2009-06-12 | 2010-05-05 | 中国西电电气股份有限公司 | Firm lightning arrester |
| CN202133746U (en) * | 2011-06-09 | 2012-02-01 | 平高集团有限公司 | Insulation test device of ultra-high rod-type insulating part |
| CN202166716U (en) * | 2011-06-10 | 2012-03-14 | 平高集团有限公司 | Insulation test device used for superhigh voltage basin-type insulator |
| CN102255258A (en) * | 2011-07-19 | 2011-11-23 | 沈阳华利能源设备制造有限公司 | 126-kV cabinet type gas-insulated metal-closed switching equipment |
| CN202720974U (en) * | 2012-08-22 | 2013-02-06 | 河南平高电气股份有限公司 | Disc insulator |
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| CN102842394A (en) | 2012-12-26 |
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Address after: South East of Pingdingshan city in Henan province 467001 No. 22 Applicant after: Pinggao Electric Co., Ltd., Henan Applicant after: Pinggao Group Co., Ltd. Applicant after: State Grid Corporation of China Address before: South East of Pingdingshan city in Henan province 467001 No. 23 Applicant before: Pinggao Electric Co., Ltd., Henan Applicant before: Pinggao Group Co., Ltd. Applicant before: State Grid Corporation of China |
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