CN103594950A - Pole moving-end shielding structure of solid insulation switch - Google Patents
Pole moving-end shielding structure of solid insulation switch Download PDFInfo
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- CN103594950A CN103594950A CN201310620845.6A CN201310620845A CN103594950A CN 103594950 A CN103594950 A CN 103594950A CN 201310620845 A CN201310620845 A CN 201310620845A CN 103594950 A CN103594950 A CN 103594950A
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Abstract
The invention discloses a pole moving-end shielding structure of a solid insulation switch. The pole moving-end shielding structure comprises a grounding layer, an insulation layer formed through curing, a vacuum arc-extinguishing chamber, a three-medium junction consisting of a ceramic case and a metal cover in the vacuum arc-extinguishing chamber and epoxy resin, a lower wire outgoing terminal, a flexible connector, an insulation pull rod and a shielding case. The lower end of the vacuum arc-extinguishing chamber is respectively connected with the flexible connector and the insulation pull rod, the shielding case is arranged at the pole moving end of the vacuum arc-extinguishing chamber, the portion of the shielding case located outside the pole moving end surrounds the three-medium junction, the lower wire outgoing terminal and the outside of the flexible connector, and the flexible connector and the lower wire outgoing terminal are fixedly connected with the shielding case. A high electric field can be moved to the inside of the insulation layer, accordingly the problem of uneven electric field distribution on the shielding pole moving end side is solved, and the problem that edge electric field values of the three-medium junction and an electric conductor are out of the limits is mainly solved. The electric field distribution of the whole pole moving end is optimized, the ole moving-end shielding structure is simple, low in production cost and high in reliability, and accordingly the advantages of a solid insulation technology are played.
Description
Technical field
the present invention relates to power transmission and distribution switchgear and manufacture field, especially a kind of pole moved end shielding construction of solid insulation switch.
Background technology
Solid insulation switch is because it is without SF6 gas, therefore to environment environmental protection.Its outer surface has metal or the coated semiconductor of ground connection, and human body in service can touch; By utilizing tolerance field intensity and the comparatively good heat radiation that solid insulating material is higher, solid-state insulated switchgear structure is compacter.
At present pole mainly by insulated tension pole, be flexible coupling, lower wire end, arc control device assembly, epoxy package and upper outlet terminal form.Due to the epoxy earthing of casing, side, pole moved end mainly relies on air insulation.Affected by air insulation distance and pole moved end and its connector shape, in pole moved end, side Electric Field Distribution is extremely inhomogeneous, and electric field strength easily exceeds the tolerance field intensity of air, destroys the insulation property of product.The electric field of three medium intersections of the porcelain shell in vacuum interrupter and crown cap and epoxy resin also has obvious deterioration simultaneously.
Application number is: 201210340230.3 patent of invention discloses a kind of pole, its pole moved end side include be down flexible coupling, lower wire end, insulated tension pole.Outside the junction surface of upper leading-out terminal and upper outlet rod, be provided with cover body, can make pole internal electric field even, still, the insulating barrier earthing of casing, the pole moved end of vacuum interrupter links together with lower wire end and insulated tension pole by being flexible coupling.Three medium intersection field intensity of vacuum interrupter lower end and epoxy and air are higher, and arc control device easily produce the concentrated problem of field intensity with the junction being flexible coupling and the end of lower wire end.Cause for above-mentioned reasons the Electric Field Distribution of pole moved end side uneven, affect the insulation property of pole integral body.
Application number is: 201210329224.8 patent of invention discloses a kind of solid insulation pole moved end screening arrangement, includes the conductive seal circle of ground plane, insulating barrier, vacuum interrupter, radome and annular.The insulating barrier earthing of casing, the pole moved end of vacuum interrupter connects by conductive seal circle and radome the inside that is cast in described insulating barrier.Radome by insulating barrier inside solves the concentrated problem of pole moved end field intensity.In vacuum interrupter, the field intensity concentration problem of porcelain shell and crown cap and epoxy resin three medium intersections still can not get improving, and can not solve the electric field concentration problem at the sub-end of lower wire end in outlet structure and edge thereof.
Summary of the invention
The invention provides a kind of pole moved end shielding construction of solid insulation switch, by being located at the shielding case of the pole moved end of vacuum interrupter, around three medium intersections, be flexible coupling and lower wire end, high electric field is transferred to insulating barrier inside, thereby having solved the problem of the Electric Field Distribution inequality of shielding pole moved end side, is mainly the problem that the fringe field value of three medium intersections and electric conductor exceeds standard.
The present invention adopts following technical scheme: a kind of pole moved end shielding construction of solid insulation switch, comprise ground plane, the insulating barrier of curing molding, vacuum interrupter, the three medium intersections that porcelain shell in vacuum interrupter and crown cap and epoxy resin form, lower wire end, be flexible coupling, insulated tension pole and shielding case, the lower end of vacuum interrupter respectively be flexible coupling, insulated tension pole connects, described shielding case is located at the pole moved end of vacuum interrupter, described shielding case is positioned at the part outside pole moved end, around three medium intersections, lower wire end and the outside being flexible coupling, described be flexible coupling be fixedly connected with shielding case with lower wire end.
Preferably, the upper end of described shielding case is higher than three medium intersections, and its lower end is lower than the intersection of the metal in insulated tension pole and epoxy resin, and the distance >=2mm of described shielding case and vacuum interrupter, with the distance >=3mm of insulating barrier outer surface and inner surface.
Further, to be positioned at the part outside pole moved end be U-shaped sheet to described shielding case.
Further, the outward flange of described shielding case is provided with round flange or rounded corner, and shielding case is provided with a plurality of through holes.
Further, be provided with location inserts in described shielding case, the one end being flexible coupling and lower wire end are fixed on the inserts of location.
Further, described in be flexible coupling and comprise the sheet metal of multiple-layer stacked, the most advanced and sophisticated outstanding and interlayer in its side has air-gap, and side surface parcel one deck semiconductive silicon rubber.
Further, described in, be flexible coupling with the braided metal band of fillet.
Further, the sub-edge of described lower wire end is provided with round flange or rounded corner.
Usefulness of the present invention is, by being located at the shielding case of the pole moved end of vacuum interrupter, around three medium intersections, be flexible coupling and lower wire end, high electric field is transferred to insulating barrier inside, thereby having solved the problem of the Electric Field Distribution inequality of shielding pole moved end side, is mainly the problem that the fringe field value of three medium intersections and electric conductor exceeds standard; Optimized the Electric Field Distribution of whole pole moved end, made full use of the tolerance field intensity that solid insulating material is higher and make whole insulation system simpler, production cost is lower, reliability is higher, thereby has given play to the advantage of solid insulation technology; Whole equipment size is reduced, and equipment is more compact, and has higher reliability, solve existing product insulation weak link aspect problem, aspect the miniaturization that realizes solid insulation equipment, there is extremely important effect, and have very considerable economic benefit.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention;
Fig. 2 is the shielding case schematic diagram of the embodiment of the present invention 1;
Fig. 3 is the shielding case schematic diagram of the embodiment of the present invention 2;
Reference numeral: 1, ground plane; 2, the insulating barrier of curing molding; 3, shielding case; 31, shielding case is positioned at the part outside pole moved end; 311, outward flange; 312, through hole; 313, location inserts; 4, three medium intersections; 5, vacuum interrupter; 6, lower wire end; 7, be flexible coupling; 8, insulated tension pole; 81, metal; 82, epoxy resin.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As Figure 1-3, a kind of pole moved end shielding construction of solid insulation switch, comprise three medium intersections 4, lower wire end 6 that porcelain shell in the insulating barrier 2, vacuum interrupter 5, vacuum interrupter of ground plane 1, curing molding and crown cap and epoxy resin forms, be flexible coupling 7, insulated tension pole 8 and shielding case 3, the lower end of vacuum interrupter 5 respectively be flexible coupling 7, insulated tension pole 8 is connected.Owing to being coated with the setting of the ground plane 1 of conductor or semi-conducting material, between whole galvanic circle and ground plane 1, form strong electric field region.Particularly the electric field of three medium intersections 4 of the porcelain shell in vacuum interrupter 5 and crown cap and epoxy resin has obvious deterioration, pole moved end side be flexible coupling 7 and the surface of lower wire end 6 particularly the field intensity value at edge also have significantly and increase.
As shown in Figure 1, shielding case 3 is located at the pole moved end of vacuum interrupter 5, and shielding case 3 is positioned at that part outside pole moved end is looped around three medium intersections 4, lower wire end 6 and 7 the outside of being flexible coupling, and is flexible coupling 7 to be fixedly connected with shielding case 3 with lower wire end 6.Be flexible coupling on the positioned internal inserts 313 that 7 the other end and lower wire end 6 be fixed on shielding case 3.The upper end of shielding case 3 is higher than three medium intersections 4, and its lower end is the intersection with epoxy resin 82 lower than the metal 81 in insulated tension pole 8, and the distance >=2mm of shielding case 3 and vacuum interrupter 5, with the distance >=3mm of insulating barrier 2 outer surfaces and inner surface.High electric field being transferred to insulating barrier 2 inside, thereby solved the problem of the Electric Field Distribution inequality of electrode column of vacuum arc extinguishing chamber moved end side, is mainly the problem that the fringe field value of three medium intersections and electric conductor exceeds standard; Optimized the Electric Field Distribution of whole pole moved end.
As shown in Figure 2,3, the part that shielding case 3 is positioned at outside pole moved end is U-shaped sheet, and its outward flange 311 is provided with round flange or rounded corner, further optimizes the Electric Field Distribution in insulating barrier 2.This shielding case 3 pours into an integrated entity with the pole moved end of vacuum interrupter, and the location inserts 313 by shielding case inside is fixed on and on mould, is cast in epoxy inside again.The bottom shape solid insulation switch shell shape corresponding with it at its U-shaped position adapts.Shielding case 3 can be metal machine-shaping or semi-conducting material forms by cast, and for guaranteeing the casting performance of itself and insulating barrier 2, shielding case 3 is provided with a plurality of through holes 312.
7 sheet metals that comprise multiple-layer stacked that are flexible coupling, the most advanced and sophisticated outstanding and interlayer in its side has air-gap, and side surface parcel one deck semiconductive silicon rubber.Thereby further improve its Electric Field Distribution.
Be flexible coupling and 7 also can be a braided metal band with fillet.
By being located at the shielding case of the pole moved end of vacuum interrupter, around three medium intersections, be flexible coupling and lower wire end, high electric field is transferred to insulating barrier inside, thereby having solved the problem of the Electric Field Distribution inequality of shielding pole moved end side, is mainly the problem that the fringe field value of three medium intersections and electric conductor exceeds standard; Optimized the Electric Field Distribution of whole pole moved end, made full use of the tolerance field intensity that solid insulating material is higher and make whole insulation system simpler, production cost is lower, reliability is higher, thereby has given play to the advantage of solid insulation technology; Whole equipment size is reduced, and equipment is more compact, and has higher reliability, solve existing product insulation weak link aspect problem, aspect the miniaturization that realizes solid insulation equipment, there is extremely important effect, and have very considerable economic benefit.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but those skilled in the art should be understood that; within not departing from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (8)
1. the pole moved end shielding construction of a solid insulation switch, comprise ground plane, the insulating barrier of curing molding, vacuum interrupter, the three medium intersections that porcelain shell in vacuum interrupter and crown cap and epoxy resin form, lower wire end, be flexible coupling and insulated tension pole, the lower end of vacuum interrupter respectively be flexible coupling, insulated tension pole connects, shielding case, it is characterized in that, described shielding case is located at the pole moved end of vacuum interrupter, described shielding case is positioned at the part outside pole moved end, around three medium intersections, lower wire end and the outside being flexible coupling, described be flexible coupling be fixedly connected with shielding case with lower wire end.
2. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 1, it is characterized in that, the upper end of described shielding case is higher than three medium intersections, its lower end is lower than the intersection of the metal in insulated tension pole and epoxy resin, distance >=the 2mm of described shielding case and vacuum interrupter, with the distance >=3mm of insulating barrier outer surface and inner surface.
3. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 2, is characterized in that, the part that described shielding case is positioned at outside pole moved end is U-shaped sheet.
4. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 3, is characterized in that, the outward flange of described shielding case is provided with round flange or rounded corner, and shielding case is provided with a plurality of through holes.
5. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 4, is characterized in that, is provided with location inserts in described shielding case, and the one end being flexible coupling and lower wire end are fixed on the inserts of location.
6. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 5, is characterized in that, described in be flexible coupling and comprise the sheet metal of multiple-layer stacked, the most advanced and sophisticated outstanding and interlayer in its side has air-gap, and side surface parcel one deck semiconductive silicon rubber.
7. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 5, is characterized in that, described in be flexible coupling with the braided metal band of fillet.
8. the pole moved end shielding construction of a kind of solid insulation switch as claimed in claim 5, is characterized in that, the sub-edge of described lower wire end is provided with round flange or rounded corner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310620845.6A CN103594950B (en) | 2013-11-29 | 2013-11-29 | The pole moved end shielding construction of solid insulation switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310620845.6A CN103594950B (en) | 2013-11-29 | 2013-11-29 | The pole moved end shielding construction of solid insulation switch |
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| CN103594950A true CN103594950A (en) | 2014-02-19 |
| CN103594950B CN103594950B (en) | 2016-06-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201042A (en) * | 2014-09-04 | 2014-12-10 | 麦克奥迪（厦门）电气股份有限公司 | Polar column inner chamber shielding structure of solid insulation switch |
| CN104269768A (en) * | 2014-09-10 | 2015-01-07 | 平高集团有限公司 | Shielding cover, embedded pole with shielding cover and solid insulation ring main unit with shielding cover |
| CN104658811A (en) * | 2015-03-19 | 2015-05-27 | 麦克奥迪（厦门）电气股份有限公司 | Pole component of solid sealed terminal |
| CN108807068A (en) * | 2017-04-26 | 2018-11-13 | 伊顿电力设备有限公司 | A kind of solid insulation cylinder |
| CN114203371A (en) * | 2021-11-09 | 2022-03-18 | 北京中车赛德铁道电气科技有限公司 | Conductive insert connecting structure for solid insulation module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201042A (en) * | 2014-09-04 | 2014-12-10 | 麦克奥迪（厦门）电气股份有限公司 | Polar column inner chamber shielding structure of solid insulation switch |
| CN104269768A (en) * | 2014-09-10 | 2015-01-07 | 平高集团有限公司 | Shielding cover, embedded pole with shielding cover and solid insulation ring main unit with shielding cover |
| CN104658811A (en) * | 2015-03-19 | 2015-05-27 | 麦克奥迪（厦门）电气股份有限公司 | Pole component of solid sealed terminal |
| CN108807068A (en) * | 2017-04-26 | 2018-11-13 | 伊顿电力设备有限公司 | A kind of solid insulation cylinder |
| CN108807068B (en) * | 2017-04-26 | 2022-11-04 | 伊顿电力设备有限公司 | Solid insulating cylinder |
| CN114203371A (en) * | 2021-11-09 | 2022-03-18 | 北京中车赛德铁道电气科技有限公司 | Conductive insert connecting structure for solid insulation module |
| CN114203371B (en) * | 2021-11-09 | 2024-04-02 | 北京中车赛德铁道电气科技有限公司 | Conductive insert connecting structure for solid insulation module |
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| CN103594950B (en) | 2016-06-08 |
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Effective date of registration: 20201111 Address after: No.4a-5, No.810 Fangshan South Road, torch high tech Zone (Xiang'an) Industrial Zone, Xiamen City, Fujian Province Patentee after: Macaudi (Xiamen) Intelligent Electric Co.,Ltd. Address before: 361102 Fujian Province, Xiamen city Xiangan District torch hi tech Zone (Xiangan) Industrial Zone Fang Mountain Road No. 808 Patentee before: MOTIC (XIAMEN) ELECTRIC GROUP Co.,Ltd. |
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