CN103928274A - Solid insulation vacuum switch three-position isolation earth switch module - Google Patents
Solid insulation vacuum switch three-position isolation earth switch module Download PDFInfo
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- CN103928274A CN103928274A CN201410170206.9A CN201410170206A CN103928274A CN 103928274 A CN103928274 A CN 103928274A CN 201410170206 A CN201410170206 A CN 201410170206A CN 103928274 A CN103928274 A CN 103928274A
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Abstract
A solid insulation vacuum switch three-position isolation earth switch module is composed of a three-position isolation earth switch operation side, a three-position isolation earth switch, a bus interface, a wire outlet terminal, a vacuum switch, an isolation fixed contact, a grounding contact, an epoxy resin shell and an end cover. The solid insulation vacuum switch three-position isolation earth switch module is characterized in that the three-position isolation earth switch and the vacuum switch are cast inside the epoxy resin shell in parallel and connected with a conductive button contact base through a moving contact support; the grounding contact and the moving contact support are fixedly packaged to the end cover and the epoxy resin shell respectively; the isolation fixed contact is cast in the bus interface and connected with a conductor in the bus interface. The appearance profiles of all high-voltage components of the module are optimized, a shielding screen does not need to be additionally cast to the inner portion of the epoxy resin shell, miniaturization of the product is easily achieved, and the manufacturing process is simplified. Under the condition that portions capable of being touched by the human body are all grounded, magnitude of partial discharge of the product is still low; the requirement for the appearance profile of the moving contact support is low, part allowable errors are higher, the manufacturing process is simpler, cost is low, and the service life of the product is prolonged.
Description
Technical field
The present invention relates to a kind of vacuum switch three station isolation grounding switch modules that are used in high voltage switchgear, particularly a kind of for the vacuum switch three station isolation grounding switch modules on solid insulation fully closed combined electrical apparatus.
Background technology
Ring network power supply is power supply form conventional in distribution system, and ring main unit is the core component of realizing safe power supply, generally divides air insulation, SF6 insulation and solid insulation three classes.Due to air insulation performance limitations, the general volume of air insulation ring main unit is larger, and floor space is large.And because electrification in high voltage parts are directly exposed in air, properties of product are subject to can be directly affected by environment with reliability.SF6 is the extremely strong gases of a kind of greenhouse effect, is about more than 23000 times of CO2, and is extremely difficult for decomposing, and SF6 ring main unit also exists and leaks and seriously reduce the hidden danger of product insulation property in addition.
Solid insulation ring main unit passes through electrification in high voltage parts sealing, in epoxy material, to utilize the electric property of epoxy excellence to realize insulation.Although be air equally at the dielectric of epoxy inside cavity, its volume is far smaller than conventional air ring main unit.Because electrification in high voltage parts are all sealed in epoxy cavity, product strengthens greatly to the adaptability of environment.In addition the outer surface of epoxy resin housing coat conduction or semi-conductive layer be grounded, more make product reliability greatly improve.Solid insulation has its unique advantage as new technique, in same design, also brings new challenge, how to realize product miniaturization, obtains lower partial discharge quantity when insulating part is external surface grounded.
Solid insulation ring main unit primary side element mainly comprises vacuum switch, earthed switch, and isolating switch,, there is sleeve pipe/interface in entrance bushing/interface, fuse etc.And by vacuum switch, earthed switch and/or isolating switch and to cast in a module be the main flow design in market.In at present design, earthed switch and isolating switch have and make disconnecting link formula three-station, and also useful vacuum switch is realized isolation and grounding function.
Fixing disconnecting link need to be used screw or pin, because can causing electric field, the projection of screw or pin concentrates, thus the voltage endurance capability of reduction product.Particularly, for the design of insulating part external ground, be unfavorable for product miniaturization.This class design gauze screen of also need to casting in epoxy material improves electric field, manufacturing process complexity.Can effectively control electric field with vacuum switch, reduce partial discharge quantity, but vacuum switch cost be high, vacuum switch is not also widely accepted as isolating switch owing to the factor such as leaking and fracture is invisible in addition.
Summary of the invention
For the defect of above-mentioned prior art, the design's object is to provide simple, the inner field intensity of a kind of manufacture craft evenly controlled, the miniaturization solid isolated vacuum switch three station isolation grounding switch devices that insulating part is external surface grounded.
To achieve these goals, the design's technical scheme is as follows:
A kind of solid isolated vacuum switch three station isolation grounding switch devices, by three station isolation grounding switch operating sides, three station isolation grounding switchs, bus interface, outlet terminal, vacuum switch, isolation fixed contact, grounding contact, epoxy resin housing and end cap main element composition; Water parallel with vacuum switch of described three station isolation grounding switchs casts from epoxy resin housing, and supported with conductive contact finger seat and be connected by moving contact; Moving contact supports sealing in epoxy resin housing; Isolation fixed contact waters and casts from bus interface and be connected with bus interface inner conductor.
Described epoxy resin housing has the opening coordinating with end cap in upper end, lower end has the interface coordinating with bus interface.
Described bus interface is fixedly linked by bolt and epoxy resin housing, and both mating interfaces can be taper, can be not limited to taper, can be other bayonet socket shapes, and this kind of design can ensure accuracy and the sealing of location.
In described conductive contact finger seat, be processed with the groove that conductive contact finger is installed.
Described conductive contact finger seat is arranged on moving contact by the mode of rear assembling and supports;
Between described conductive contact finger seat and moving contact support, be removable being fixedly connected with; Can be to be threaded, but be not limited to be threaded; Support as being arranged on moving contact by screw.
Described moving contact supports to water together with vacuum switch and casts from epoxy resin housing, between be connected with conductive contact finger by conductive contact finger seat.
Three described one end, station isolation grounding switch operating side are fixed together by the removable mode that is fixedly connected with three station operating mechanism output shafts, the removable mode that is fixedly connected with can be that pin connects, the other end is fixed together by the removable mode that is fixedly connected with insulation drive rod through grounding contact, and the removable mode that is fixedly connected with can be to be threaded; Three station isolation grounding switch operating sides and grounding contact seal with sealing ring.
Three described station operating mechanisms are prior art, can select motor-driven gear transmission composition.Drive the three positive and negative rotations in station isolation grounding switch operating side by motor positive and inverse, the diverse location of realizing switch switches.
Described grounding contact both sides are provided with bearing, for supporting three station isolation grounding switch operating sides.
Three described station isolation grounding switchs are moved up and down and are realized the closing of three station isolation grounding switchs, isolation and ground connection by moving contact.
Described moving contact is fixedly connected with drive nut.
Described moving contact supports inwall and is provided with fixing guide pad, rotates for limiting moving contact.
Conductive contact finger is equipped with at described moving contact two ends, supports for the isolation fixed contact of conducting in the time closing position and moving contact, and in the time of earthing position, conducting grounding contact and moving contact support.
Described vacuum switch lower end is cast with outlet terminal, and for connecting outlet, upper end is connected with insulated tension pole by screw thread.
Described insulated tension pole and bellows upper end are tightly connected, and bellows lower end is sealingly fastened on end cap, realize the sealing of insulated tension pole interface and epoxy resin shell cavity.
On described epoxy resin housing and the contact-making surface of end cap, there is seal groove, for packing sealing ring into, reach the sealing between epoxy resin housing and end cap.
Described epoxy resin housing left side has observation window, and for judging the service position of moving contact, epoxy resin housing inner side is cast with full skirt.
Described moving contact inside is provided with position indicator and back-moving spring, and the moving contact total holding position of back-moving spring direction board in the time of ungrounded position is given prominence to outside moving contact.When moving contact is in isolated location, operator can see position indicator by observation window.In the time that moving contact moves to earthing position, grounding contact will promote position indicator compression reseting spring.This method for indicating position is not increasing under the prerequisite of contact head insulated distance, does not increase under the prerequisite of product size, and clearer and more definite location identification mark can be provided.
This programme design has the following advantages:
1, all high voltage components in the time of service position outside table skeleton all pass through optimization, the extra gauze screen of need to not casting in epoxy resin housing, product electric field is even, insulation distance required under identical withstand voltage is shorter, is easy to realize product miniaturization.Due to without casting gauze screen, simplify manufacturing process in addition.
2, under whole module operating state charged parts around air gap can set according to designing requirement, do not exist internal field to concentrate, though meet human body can touch position all under the condition of ground connection product partial discharge quantity also very low.
3, in the present invention, moving contact supports can do less, more save material. because supporting to water, moving contact casts from epoxy resin housing, the relative air of its surperficial electric field value allowable will improve greatly, require lower so moving contact supports appearance profile, part admissible error is higher, manufacturing process is simpler, and cost is lower.
4, in the present invention, conductive contact finger seat is assemblied in moving contact support by dismountable mode, mode than direct pouring in epoxy resin housing, has avoided owing to forgetting and packing the risk that conductive contact finger causes whole product rejection into before conductive contact finger damage or casting.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.
In the accompanying drawings:
Fig. 1 is structural principle composition of the present invention.
Embodiment
As shown in Figure 1, a kind of solid isolated vacuum switch three station isolation grounding switch devices, comprise three station isolation grounding switch operating sides 1, three station isolation grounding switchs 3, bus interface 11, outlet terminal 13, vacuum switch 16, epoxy resin housing 18 and end cap 20.Described three station isolation grounding switchs 2 and vacuum switch 16 horizontal arrangement are in same air chamber, and support 6 by moving contact and be connected with conductive contact finger seat 15, and conductive contact finger seat 15 inside are processed with the groove that conductive contact finger is installed; Grounding contact 2 and moving contact support 6 other sealings in end cap 20 and epoxy resin housing 18; Isolation fixed contact 12 waters and casts from bus interface 11 and be connected with bus interface 11 inner conductors.
Three 1 one end, station isolation grounding switch operating sides are connected with three station operating mechanisms, and the other end is fixed together through grounding contact 2 and insulation drive rod 4.Three station isolation grounding switch operating sides 1 also can be made of one with insulation drive rod 4.Three station isolation grounding switch operating sides 1 seal by sealing ring with grounding contact 2.Grounding contact 2 both sides are provided with bearing, for supporting three station isolation grounding switch operating sides 1.
The grounding contact 2 of three station isolation grounding switchs 3 and moving contact support 6 sealings are in end cap 20 and epoxy resin housing 18 respectively, and isolation fixed contact 12 waters and casts from bus interface 11 and be connected with bus interface 11 inner conductors; Bus interface 11 is fixedly linked by bolt and epoxy resin housing 18; Both mating interfaces do tapered, certainly other bayonet socket shapes also can, this kind of design can ensure accuracy and the sealing of location.
Moving contact supports on 6 sidewalls and has processed two perforates, and before casting, guide pad 7 is pressed into perforate and casts in epoxy resin housing 18.Moving contact 9 supports in 6 and moves up and down and realize closing of three station isolation grounding switchs at moving contact, isolation and ground connection, its motion implementation is: three station operating mechanisms drive insulation drive rods 4 to rotate by three station isolation grounding switch operating sides 1, and the drive nut 10 that is fixed together of drive and moving contact 9.Because guide pad 7 can rotate by restriction moving contact 9, drive nut 10 and moving contact 9 can only be moved up and down.Conductive contact finger 8 is equipped with at moving contact 9 two ends, for the circuit between conducting moving contact 9 and other parts.
Vacuum switch 14 waters and casts from epoxy resin housing together with moving contact support 6, between them, connects by conductive contact finger seat 15 and conductive contact finger.Vacuum switch 14 lower ends are cast with the outlet terminal 13 for connecting outlet, and upper end is connected with insulated tension pole 17 by screw thread.Insulated tension pole 17 is tightly connected with bellows 21 upper ends, and bellows 21 lower ends are sealingly fastened on end cap 20, realize the sealing of insulated tension pole 17 interfaces and epoxy resin housing 18 cavitys.On the contact-making surface of epoxy resin housing 18 and end cap 20, there is seal groove 19, realize the sealing between the two for packing sealing ring into.After assembling, all electrification in high voltage parts all can be reached the degree of protection of IP68 by epoxy sealing, and module can normally be moved under water.The outer surface of epoxy material scribble conduction or semi-conductive layer for ground connection, so just ensured that the territory, access area of whole module is all in low potential.
Epoxy resin housing 18 left sides have observation window 5, for judging the service position of moving contact 9, have improved processing safety.Its feasible implementation is: in moving contact 9 inside, position indicator 22 and back-moving spring 23 are installed, the moving contact 9 total holding position of back-moving spring direction board 22 in the time of ungrounded position is given prominence to outside moving contact 9.When moving contact 9 is in isolated location, operator can see position indicator 22 by observation window 5.In the time that moving contact 9 moves to earthing position, grounding contact 2 will promote position indicator 22 compression reseting springs.This method for indicating position is not increasing under the prerequisite of contact head insulated distance, does not increase under the prerequisite of product size, and clearer and more definite location identification mark can be provided.In order to meet creepage distance requirement in the confined space, epoxy resin housing 18 inner sides are cast with full skirt.
Claims (11)
1. solid isolated vacuum switch three station isolation grounding switch devices, by three station isolation grounding switch operating sides, three station isolation grounding switchs, bus interface, outlet terminal, vacuum switch, isolation fixed contact, grounding contact, epoxy resin housing and end cap composition; It is characterized in that: water parallel with vacuum switch of described three station isolation grounding switchs casts from epoxy resin housing, and supported with conductive contact finger seat and be connected by moving contact; Described grounding contact and moving contact support difference sealing in end cap and epoxy resin housing; Described isolation fixed contact waters and casts from bus interface and be connected with bus interface inner conductor.
2. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: described epoxy resin housing has the opening coordinating with end cap in upper end, lower end has the interface coordinating with bus interface.
3. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1 and 2, is characterized in that: described bus interface is fixedly linked by bolt and epoxy resin housing, and both mating interfaces can be taper.
4. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: described conductive contact finger seat is arranged on moving contact by the mode of rear assembling and supports above, and mounting means is removable being fixedly connected with.
5. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, it is characterized in that: three described one end, station isolation grounding switch operating side are fixed together by the removable mode that is fixedly connected with three station operating mechanism output shafts, the other end is fixed together by the removable mode that is fixedly connected with insulation drive rod through grounding contact; Between three station isolation grounding switch operating sides and grounding contact, seal with sealing ring.
6. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: described grounding contact both sides are provided with bearing, support three station isolation grounding switch operating sides.
7. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: described moving contact supports inwall and is provided with fixing guide pad, rotate for limiting moving contact.
8. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: between described conductive contact finger seat and moving contact support, be removable being fixedly connected with.
9. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: in described conductive contact finger seat, be processed with the groove that conductive contact finger is installed.
10. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: conductive contact finger is equipped with at described moving contact two ends.
11. solid isolated vacuum switch three station isolation grounding switch devices according to claim 1, is characterized in that: described moving contact inside is provided with position indicator and back-moving spring; The moving contact total holding position of back-moving spring direction board in the time of ungrounded position is given prominence to outside moving contact; When moving contact is in isolated location, operator can see position indicator by observation window; In the time that moving contact moves to earthing position, grounding contact will promote position indicator compression reseting spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170206.9A CN103928274B (en) | 2014-04-25 | 2014-04-25 | Solid insulation vacuum switch three-position isolation earth switch module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170206.9A CN103928274B (en) | 2014-04-25 | 2014-04-25 | Solid insulation vacuum switch three-position isolation earth switch module |
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| Publication Number | Publication Date |
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| CN103928274A true CN103928274A (en) | 2014-07-16 |
| CN103928274B CN103928274B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410170206.9A Active CN103928274B (en) | 2014-04-25 | 2014-04-25 | Solid insulation vacuum switch three-position isolation earth switch module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922801A (en) * | 2018-05-31 | 2018-11-30 | 国网上海市电力公司 | A kind of contact linear motion drive mechanism |
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| CN101677177A (en) * | 2008-09-19 | 2010-03-24 | 沈阳昊诚电力科技有限公司 | Epoxy pouring type solid insulation switch with three-cabin |
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| CN108922801A (en) * | 2018-05-31 | 2018-11-30 | 国网上海市电力公司 | A kind of contact linear motion drive mechanism |
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| CN103928274B (en) | 2017-01-11 |
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Effective date of registration: 20160322 Address after: 361006 Mike building, torch high tech Industrial Development Zone, Huli District, Fujian, Xiamen, China Applicant after: AI Kai (Xiamen) Electric Technology Co., Ltd. Address before: 361006 Mike building, torch high tech Industrial Development Zone, Huli District, Fujian, Xiamen, China Applicant before: SPEED FAIR (XIAMEN) CO., LTD. |
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