CN103928274B - 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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- CN103928274B CN103928274B CN201410170206.9A CN201410170206A CN103928274B CN 103928274 B CN103928274 B CN 103928274B CN 201410170206 A CN201410170206 A CN 201410170206A CN 103928274 B CN103928274 B CN 103928274B
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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 isolating grounding switch module being used in high-tension switch gear, a kind of vacuum switch three-station isolating grounding switch module on solid insulation fully closed combined electrical apparatus.
Background technology
Ring network power supply is power-supplying forms conventional in distribution system, and ring main unit is the core component realizing safe power supply, typically divides air insulation, SF6 insulation and solid insulation three class.Owing to air insulation performance limits, the general volume of air insulation ring main unit is relatively big, and floor space is big.And owing to high-voltage live parts is directly exposed in air, properties of product are subject to and reliability can be the most affected by environment.SF6 is more than 23000 times of the gas that a kind of greenhouse effect is extremely strong, about CO2, and pole is not easily decomposed, and additionally SF6 ring main unit there is also leakage and seriously reduces the hidden danger of product insulating properties.
Solid insulation ring main unit by by high-voltage live parts sealing in epoxy material, the electric property utilizing epoxy excellent realizes insulation.Although the dielectric in epoxy inside cavity is air equally, but its volume is far smaller than conventional air ring main unit.Owing to high-voltage live parts is all sealed in epoxy cavity, the adaptability of environment is greatly enhanced by product.Additionally the outer surface at epoxy resin housing coats conduction or semi-conductive layer is grounded, more makes product reliability be greatly improved.Solid insulation has the advantage of its uniqueness as new technique, and same design is also brought new challenge, the most how to realize product miniaturization, is obtaining relatively low partial discharge quantity while insulating part is external surface grounded.
Solid insulation ring main unit primary side element mainly includes vacuum switch, earthed switch, disconnecting switch, entrance bushing/interface, sleeve pipe/interface, fuse etc. occurs.And by vacuum switch, earthed switch and/or disconnecting switch with to cast in a module be the mainstay in market.In at present design, earthed switch and disconnecting switch have and make disconnecting link formula three-station, and the most useful vacuum switch realizes isolation and grounding function.
Fixing disconnecting link needs to use screw or pin, owing to the projection of screw or pin can cause electric field to concentrate, thus reduces the voltage endurance capability of product.Especially for the design of insulating part external ground, it is unfavorable for product miniaturization.This kind of design gauze screen that also needs to cast in epoxy material is to improve electric field, and manufacturing process is complicated.Can efficiently control electric field with vacuum switch, reduce partial discharge quantity, but vacuum switch cost is high, additionally vacuum switch is not the most widely accepted as disconnecting switch owing to the factor such as leaking and fracture is invisible.
Summary of the invention
For the defect of above-mentioned prior art, the purpose of the design is to provide a kind of processing technology field intensity uniform, controllable simple, internal, the miniaturization solid insulation vacuum switch three-station isolating grounding switch device that insulating part is external surface grounded.
To achieve these goals, the technical scheme of the design is as follows:
A kind of solid insulation vacuum switch three-station isolating grounding switch device, by three-station isolating grounding switch operating side, three-station isolating grounding switch, bus interface, outlet terminal, vacuum switch, isolation static contact, grounding contact, epoxy resin housing and end cap main element composition；Water parallel with vacuum switch of described three-station isolating grounding switch casts from epoxy resin housing, and is connected with conductive contact finger seat by moving contact support；Moving contact supports sealing in epoxy resin housing；Isolation static contact waters in casting from bus interface and is connected with bus interface inner conductor.
Described epoxy resin housing has the opening coordinated with end cap in upper end, and lower end has the interface coordinated with bus interface.
Described bus interface is fixedly linked with epoxy resin housing by bolt, and both mating interfaces are taper, can be not limited to taper, can be other bayonet shape, and this kind of design can ensure accuracy and the sealing of location.
Described conductive contact finger seat is machined with the groove installing conductive contact finger.
Described conductive contact finger seat is arranged on moving contact by the way of rear assembling and supports；
Described conductive contact finger seat and moving contact fixing are connected for removable between supporting；Can be threaded, but be not limited to 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 connected by conductive contact finger seat and conductive contact finger.
Described one end, three-station isolating grounding switch operating side is fixed together by removable fixing connected mode with three station operating mechanism output shafts, removable fixing connected mode can be that pin connects, the other end is fixed together by removable fixing connected mode through grounding contact with insulation drive rod, and removable fixing connected mode can be threaded；Three-station isolating grounding switch operating side seals with grounding contact sealing ring.
Three described station operating mechanisms are prior art, optional motor-driven gear transmission composition.The positive and negative rotation in three-station isolating grounding switch operating side is driven, it is achieved the diverse location switching of switch by motor positive and inverse.
Described grounding contact both sides are provided with bearing, are used for supporting three-station isolating grounding switch operating side.
Described three-station isolating grounding switch is moved up and down by moving contact and realizes the closing of three-station isolating grounding switch, isolates and ground connection.
Described moving contact is fixing with driving nut to be connected.
Described moving contact supports inwall and is provided with fixing guide pad, is used for limiting moving contact and rotates.
Described moving contact two ends, equipped with conductive contact finger, support for conducting isolation static contact and moving contact when closing position, turn on grounding contact when earthing position and moving contact supports.
Described vacuum switch lower end is cast with outlet terminal, is used for connecting outlet, and upper end is connected with insulated tension pole by screw thread.
Described insulated tension pole is tightly connected with corrugated tube upper end, and corrugated tube lower end is sealingly fastened on end cap, it is achieved insulated tension pole interface and the sealing of epoxy resin shell cavity.
Described epoxy resin housing has seal groove on the contact surface of end cap, is used for loading sealing ring, reaches the sealing between epoxy resin housing and end cap.
Having observation window on the left of described epoxy resin housing, for judging the operating position of moving contact, epoxy resin case inside is cast with full skirt.
Described moving contact is internally installed position indicator and back-moving spring, and when moving contact is in ungrounded position, back-moving spring total holding position direction board highlights outside moving contact.When moving contact is in isolated location, and operator can see position indicator by observation window.When moving contact moves to earthing position, grounding contact is by pushing position direction board compression reseting spring.This method for indicating position is not on the premise of increasing contact head insulated distance, on the premise of not increasing product size, it is provided that location identification mark definitely.
This programme design has the following advantages:
1, all high voltage components outer table skeleton when operating position all passes through optimization, it is not necessary to extra gauze screen of casting in epoxy resin housing, product electric fields uniform, insulation distance required under identical withstanding voltage is shorter, it is easy to accomplish product miniaturization.Additionally, due to without gauze screen of casting, simplify manufacturing process.
2, parts surrounding air gap charged under whole module duty can set according to design requirement, there is not internal field and concentrates, even if product partial discharge quantity is the lowest under conditions of meeting the accessible position of human body all ground connection.
3, in the present invention moving contact support can do less, more save material. cast from epoxy resin housing owing to moving contact supports to water, its surface electric field value allowable relative atmospheric to be greatly improved, so moving contact supports appearance profile and requires relatively low, part allowable 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, compared to direct pouring mode in epoxy resin housing, it is to avoid damage due to conductive contact finger or forget to load conductive contact finger before casting and cause the risk of whole product rejection.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.
In the accompanying drawings:
Fig. 1 is present configuration principle composition.
Detailed description of the invention
As it is shown in figure 1, a kind of solid insulation vacuum switch three-station isolating grounding switch device, including three-station isolating grounding switch operating side 1, three-station isolating grounding switch 3, bus interface 11, outlet terminal 13, vacuum switch 16, epoxy resin housing 18 and end cap 20.Described three-station isolating grounding switch 2 and vacuum switch 16 is horizontally disposed is in same air chamber, and support 6 by moving contact and be connected with conductive contact finger seat 15, the internal groove being machined with installation conductive contact finger of conductive contact finger seat 15；Grounding contact 2 and moving contact support 6 other sealings in end cap 20 and epoxy resin housing 18；Isolation static contact 12 waters in casting from bus interface 11 and is connected with bus interface 11 inner conductor.
One end, three-station isolating grounding switch operating side 1 is connected with three station operating mechanisms, and the other end is fixed together through grounding contact 2 with insulation drive rod 4.Three-station isolating grounding switch operating side 1 can also be made of one with insulation drive rod 4.Three-station isolating grounding switch operating side 1 is sealed by sealing ring with grounding contact 2.Grounding contact 2 both sides are provided with bearing, are used for supporting three-station isolating grounding switch operating side 1.
The grounding contact 2 of three-station isolating grounding switch 3 and moving contact support 6 respectively sealings in end cap 20 and epoxy resin housing 18, and isolate static contact 12 water cast from bus interface 11 in and be connected with bus interface 11 inner conductor；Bus interface 11 is fixedly linked with epoxy resin housing 18 by bolt；Both mating interfaces does tapered, certainly other bayonet shape can also, this kind of design can ensure that accuracy and the sealing of location.
Moving contact supports and machined two perforates on 6 sidewalls, and before casting, guide pad 7 is pressed into perforate and casts in epoxy resin housing 18.Moving contact 9 moves up and down in moving contact supports 6 and realizes closing of three-station isolating grounding switch, isolation and ground connection, its motion implementation is: three station operating mechanisms drive insulation drive rod 4 to rotate by three-station isolating grounding switch operating side 1, and drive the driving nut 10 being fixed together with moving contact 9.Rotate owing to guide pad 7 can limit moving contact 9 so that drive nut 10 and moving contact 9 to move up and down.Moving contact 9 two ends are equipped with conductive contact finger 8, for turning on the circuit between moving contact 9 and other parts.
Vacuum switch 14 waters together with moving contact support 6 and casts from epoxy resin housing, is connected by conductive contact finger seat 15 and conductive contact finger between them.Vacuum switch 14 lower end is 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 corrugated tube 21 upper end, and corrugated tube 21 lower end is sealingly fastened on end cap 20, it is achieved insulated tension pole 17 interface and the sealing of epoxy resin housing 18 cavity.Epoxy resin housing 18 has seal groove 19 on the contact surface of end cap 20, realizes sealing therebetween for loading sealing ring.After assembling, all high-voltage live parts are all by the epoxy sealing degree of protection up to IP68, and module can be the most properly functioning.The outer surface of epoxy material scribble conduction or semi-conductive layer for ground connection, this ensures that there the accessible region of whole module all in low potential.
Have observation window 5 on the left of epoxy resin housing 18, for judging the operating position of moving contact 9, improve processing safety.Its feasible implementation is: having position indicator 22 and back-moving spring 23 moving contact 9 is internally installed, when moving contact 9 is in ungrounded position, back-moving spring total holding position direction board 22 highlights outside moving contact 9.When moving contact 9 is in isolated location, operator can see position indicator 22 by observation window 5.When moving contact 9 moves to earthing position, grounding contact 2 is by pushing position direction board 22 compression reseting spring.This method for indicating position is not on the premise of increasing contact head insulated distance, on the premise of not increasing product size, it is provided that location identification mark definitely.In order to meet creep age distance requirement in the confined space, inside epoxy resin housing 18, it is cast with full skirt.
Claims (10)
1. a solid insulation vacuum switch three-station isolating grounding switch device, by three-station isolating grounding switch operating side, three-station isolating grounding switch, bus interface, outlet terminal, vacuum switch, isolation static contact, grounding contact, epoxy resin housing and end cap composition；It is characterized in that: water parallel with vacuum switch of described three-station isolating grounding switch casts from epoxy resin housing, and be connected with conductive contact finger seat by moving contact support；Described grounding contact and moving contact support difference sealing in end cap and epoxy resin housing；Described isolation static contact waters in casting from bus interface and is connected with bus interface inner conductor；Described moving contact is internally installed position indicator and back-moving spring；When moving contact is in ungrounded position, back-moving spring total holding position direction board highlights outside moving contact；When moving contact is in isolated location, and operator can see position indicator by observation window；When moving contact moves to earthing position, grounding contact is by pushing position direction board compression reseting spring.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described epoxy resin housing has the opening coordinated with end cap in upper end, and lower end has the interface coordinated with bus interface.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1 and 2, it is characterised in that: described bus interface is fixedly linked with epoxy resin housing by bolt, and both mating interfaces are taper.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described conductive contact finger seat is arranged on moving contact by the way of rear assembling and supports, and mounting means is removable fixing connection.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterized in that: described one end, three-station isolating grounding switch operating side is fixed together by removable fixing connected mode with three station operating mechanism output shafts, the other end is fixed together by removable fixing connected mode through grounding contact with insulation drive rod；Seal with sealing ring between three-station isolating grounding switch operating side and grounding contact.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described grounding contact both sides are provided with bearing, support three-station isolating grounding switch operating side.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described moving contact supports inwall and is provided with fixing guide pad, is used for limiting moving contact and rotates.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described conductive contact finger seat and moving contact fixing are connected for removable between supporting.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described conductive contact finger seat is machined with the groove installing conductive contact finger.
Solid insulation vacuum switch three-station isolating grounding switch device the most according to claim 1, it is characterised in that: described moving contact two ends are equipped with conductive contact finger.
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 |
Applications Claiming Priority (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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| CN103928274A CN103928274A (en) | 2014-07-16 |
| CN103928274B true CN103928274B (en) | 2017-01-11 |
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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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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2911947Y (en) * | 2006-06-12 | 2007-06-13 | 丁文军 | State indicator of circuit breaker |
| CN101677177B (en) * | 2008-09-19 | 2011-09-07 | 沈阳昊诚电气股份有限公司 | Epoxy pouring type solid insulation switch with three-cabin |
| CN102013354B (en) * | 2010-12-29 | 2013-07-03 | 常州森源力拓开关有限公司 | Three-station isolating switch |
| CN102810426A (en) * | 2011-06-01 | 2012-12-05 | 北京维益埃电气有限公司 | Combined type vacuum circuit breaker |
| CN102420399B (en) * | 2011-08-19 | 2014-09-03 | 北京清畅电力技术股份有限公司 | Isolated insulation cover and isolating switch device |
| CN202473734U (en) * | 2012-03-23 | 2012-10-03 | 中能电气（福清）有限公司 | Embedded pole unit for solid insulated switchgear |
| CN203312132U (en) * | 2013-06-27 | 2013-11-27 | 北京清畅电力技术股份有限公司 | Three-position solid insulation isolation switch |
| CN203826329U (en) * | 2014-04-25 | 2014-09-10 | 协励行(厦门)电气有限公司 | Three-position isolated ground switch device for solid insulation vacuum switch |
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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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