CN103839728A - Tank-type breaker for gas insulated switchgear - Google Patents
Tank-type breaker for gas insulated switchgear Download PDFInfo
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- CN103839728A CN103839728A CN201410085208.8A CN201410085208A CN103839728A CN 103839728 A CN103839728 A CN 103839728A CN 201410085208 A CN201410085208 A CN 201410085208A CN 103839728 A CN103839728 A CN 103839728A
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Abstract
The invention relates to a tank-type breaker for a gas insulated switchgear, and belongs to the technical field of power supply equipment control devices. The breaker comprises a movable contact installed at one end of a shell and can move axially and a fixed contact which is fixedly arranged at the other end in the shell and is opposite to the movable contact. The movable contact is mainly composed of an annular movable contact body and a movable end arcing contact body which extends out from the center of the movable contact body. The fixed contact is mainly formed by a fixed contact body and an axially movable end arcing contact body in the center of the fixed contact body. The fixed contact body is provided with an inserting hole matched with the external contour of the movable contact body, and the fixed end arcing contact body is provided with a stretching-out end which can be connected with the movable end arcing contact body in an inserted mode; the end, far away from the stretching-out end, of the fixed end arcing contact body is hinged to one end of a short connecting rod, the other end of the short connecting rod is hinged to one end of a lever with the middle supported on the inner portion of the shell in a hinged mode, the other end of the lever is provided with a sliding groove which forms a moving pair with one end of an insulating pull rod, and the other end of the insulating pull rod is fixedly connected with the movable contact. Thus, the breaker can effectively prevent the ferromagnetic resonance phenomenon from occurring in a system without arranging a shunt capacitor at a fracture.
Description
Technical field
The present invention relates to a kind of circuit breaker, especially a kind of switchgear potting breaker, belongs to power supply unit control device technical field.
Background technology
According to the applicant understood, potting breaker is the important composition parts of the high-power gas insulated switching installations such as 550kV, when work, need to carry normal duty electric current, also wants disengagement failure electric current reliably.Divide by structure, potting breaker mainly contains two kinds of double-fracture band fracture equalizing capacitance and single break band shunt capacitances.Electric capacity on this two classes breaker fracture can improve the condition of cut-offfing of circuit breaker, is conducive to the control of cut-offfing of electric power system fault electric current.But, its easily with gas-insulated switchgear on electromagnetic potential transformer generation ferro resonance, the safe operation of gas-insulated switchgear has been buried to potential safety hazard.In addition, the relationship between quality of electric capacity itself is to the safe operation of equipment, and the fracture electric capacity of high-quality certainly will increase the manufacturing cost of equipment.
Summary of the invention
The object of the invention is to: the shortcoming existing for above-mentioned prior art, proposes a kind ofly to improve circuit breaker by reliable quick deciliter and cut-off the gas-insulated switchgear potting breaker of condition.
In order to reach above object, gas-insulated switchgear of the present invention with potting breaker basic technical scheme is: comprise be arranged in housing one end can axially movable moving contact be fixed on housing in the other end fixed contact relative with moving contact, described moving contact is mainly made up of extended moved end, the moving contact main body He Qi center arcing contact of ring-type, and described fixed contact is mainly made up of the moved axially end arcing contact at fixed contact main body He Qi center; Described fixed contact main body has the jack matching with described moving contact main body gabarit, and described quiet end arcing contact has and the plug-in external part of described moved end arcing contact; Described quiet end arcing contact is hinged away from one end of external part and one end of short connecting rod, the hinged lever one end in housing in the other end of described short connecting rod and middle part is hinged, the other end of described lever is shaped with the chute that forms moving sets with insulated tension pole one end, and the other end of described insulated tension pole and described moving contact are connected.
Like this, when in gate-dividing state, described moving contact is in leaving the retracted position of fixed contact, and described quiet end arcing contact is the position away from moved end arcing contact in retraction fixed contact main body; When in "on" position, described moving contact is in inserting the propelling position of fixed contact, and described quiet end arcing contact is in stretching out the moved end arcing contact plug-in position of fixed contact main body and propelling.The bi-directional expansion mechanism consisting of lever and short connecting rod and quiet end arcing contact due to moving contact is pushing moving contact in the making process of fixed contact, not only make moved end arcing contact advance towards fixed contact direction with moving contact, and be that quiet end arcing contact is towards moved end arcing contact counter motion simultaneously, separating brake process is just in time contrary, thereby realize rapid closing and separating brake, significantly improve the condition of cut-offfing of circuit breaker, can effectively avoid ferro resonance to occur without fracture shunt capacitance.
The present invention further improves, described moved end arcing contact has center hub, the guiding nozzle that outer end is flaring bell mouth shape is housed between described moving contact main body and moved end arcing contact, the external part of described quiet end arcing contact is made up of the inserting paragraph matching with described center hub and the extension diameter section at middle part, between described inserting paragraph and extension diameter section for and the changeover portion that matches of guiding nozzle tapering.Like this, when in "on" position, the inserting paragraph of quiet end arcing contact can contact with guiding nozzle with the center hub of moved end arcing contact with extension diameter section simultaneously, thereby it is reliable to ensure to peg graft, accurate positioning.
The present invention further improves, and it is protruding that the center of described fixed contact main body has the cone extending towards moved end arcing contact direction, and the inside of the profile that described cone is protruding and described guiding nozzle matches.Therefore when in "on" position, the cone of quiet end arcing contact is protruding will insert contact with it in guiding nozzle, thereby further ensure accurate positioning, peg graft reliable.
The present invention further improves, and described moving contact is connected with the operating mechanism that is produced axial motion by power by actuating push rod.Like this, can realize easily the automatic manipulation of separating brake and combined floodgate.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the gate-dividing state partial enlarged drawing of Fig. 1.
Fig. 3 is the "on" position partial enlarged drawing of Fig. 1.
Embodiment
Embodiment mono-
Potting breaker (referring to Fig. 2 and Fig. 3) as shown in Figure 1 for the gas-insulated switchgear of the present embodiment, installs the operating mechanism 2 that is produced horizontal axis motion by power outside tank-like shell 1 one end.Be equipped with by moved end insulating supporting 3 the interior one end of housing 1 can axially movable moving contact 4, and moving contact 4 is connected with operating mechanism 2 by actuating push rod 11.The interior other end of housing 1 is equipped with the fixed contact relative with moving contact 46 by quiet end insulating supporting 5.The outer radome 10 that is covered with respectively of moving contact 4 and fixed contact 6.Moving contact 4 is mainly made up of the moving contact main body 4-1He Qi center extended moved end arcing contact 4-2 of ring-type, and moved end arcing contact 4-2 has center hub.Fixed contact 6 is mainly made up of the moved axially end arcing contact 6-2 at fixed contact main body 6-1He Qi center.Fixed contact main body 6-1 has the jack matching with moving contact main body 4-1 gabarit, quiet end arcing contact 6-2 has the plug-in external part with moved end arcing contact 4-2, the external part of quiet end arcing contact 6-2, by forming with the inserting paragraph 6-A of moved end arcing contact 4-2 center hub and the extension diameter section 6-B at middle part, is changeover portion 6-C between inserting paragraph 6-A and extension diameter section 6-B.The guiding nozzle 4-3 that outer end is flaring bell mouth shape is housed between moving contact main body 4-1 and moved end arcing contact 4-2, and the changeover portion 6-C of quiet end arcing contact 6-2 matches with guiding nozzle 4-3 tapering.Fixed contact main body 6-1 center has the protruding 6-3 of cone extending towards moved end arcing contact 4 directions, and the profile of boring protruding 6-3 matches with the inside of guiding nozzle 4-3.Quiet end arcing contact 6-2 is hinged away from one end of external part and one end of short connecting rod 7, hinged lever 8 one end in housing in the other end of short connecting rod 7 and middle part are hinged, the other end of lever 8 is shaped with the chute 8-1 that forms moving sets with insulated tension pole 9 one end, and the other end of insulated tension pole 9 and moving contact 4 are connected.
In addition, the gas-insulated switchgear of the present embodiment also has following structure with potting breaker:
1. adsorbent equipment is equipped with in the position between the corresponding moving contact 4 in housing 1 inwall top and fixed contact 6, for effectively adsorbing subfluoride, acidic materials and the moisture etc. that in housing, SF6 produces in circuit-breaker switching on-off process.
2. explosion-protection equipment is equipped with in the position between the corresponding moving contact 4 in housing 1 outer wall bottom and fixed contact 6.When circuit breaker internal fault, arc energy raises SF6 temperature, and enclosure interior increased pressure can make housing weak part destroy.Arrange after explosion-protection equipment, in the time that the rapid increasing of enclosure interior pressure exceedes certain value, will ignite explosion-protection equipment pressure release, thereby ensure Shell of circuit breaker safety.
When work, operating mechanism can drive moving contact horizontal shift by realizing easily a point insulation push rod, realizes the automatic manipulation of required separating brake and combined floodgate.When in gate-dividing state, as shown in Figure 2, moving contact is in leaving the retracted position of fixed contact, and quiet end arcing contact is the position away from moved end arcing contact in retraction fixed contact main body; When combined floodgate, being insulated push rod drives the moving contact moving towards fixed contact direction when moved end arcing contact is advanced towards fixed contact direction thereupon, also by insulated tension pole and lever and short connecting rod, make quiet end arcing contact stretch out the counter motion of fixed contact, thereby the quiet end arcing contact external part in center is under the guiding function of guiding nozzle, first peg graft fast with moved end arcing contact, and then peripheral moving contact main body completes and the grafting of fixed contact main body.When in "on" position, as shown in Figure 3, moving contact is in inserting the propelling position of fixed contact, and in stretching out, fixed contact main body, its inserting paragraph and extension diameter section contact with guiding nozzle with the center hub of moved end arcing contact quiet end arcing contact simultaneously, the protruding insertion of cone of quiet end arcing contact guides the plug-in position contacting with it in nozzle.
Facts have proved, the gas-insulated switchgear of the present embodiment does not have under the prerequisite of shunt capacitance only having on a fracture and fracture with potting breaker, by the counter motion of dynamic and static end arcing contact, accurately location, reliable pegging graft, significantly improved contact of breaker point, resultant motion speed, thereby effectively avoided circuit breaker to cut-off the fault current in (and point, close) process, effectively eliminated the potential risk of ferro resonance.And rational in infrastructure, can effectively reduce device fabrication cost.
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of requirement of the present invention.
Claims (7)
1. a gas-insulated switchgear potting breaker, comprise be arranged in housing one end can axially movable moving contact be fixed on housing in the other end fixed contact relative with moving contact, it is characterized in that: described moving contact is mainly made up of extended moved end, the moving contact main body He Qi center arcing contact of ring-type, and described fixed contact is mainly made up of the moved axially end arcing contact at fixed contact main body He Qi center; Described fixed contact main body has the jack matching with described moving contact main body gabarit, and described quiet end arcing contact has and the plug-in external part of described moved end arcing contact; Described quiet end arcing contact is hinged away from one end of external part and one end of short connecting rod, the hinged lever one end in housing in the other end of described short connecting rod and middle part is hinged, the other end of described lever is shaped with the chute that forms moving sets with insulated tension pole one end, and the other end of described insulated tension pole and described moving contact are connected.
2. gas-insulated switchgear potting breaker according to claim 1, it is characterized in that: described moved end arcing contact has center hub, the guiding nozzle that outer end is flaring bell mouth shape is housed between described moving contact main body and moved end arcing contact, the external part of described quiet end arcing contact is made up of the inserting paragraph matching with described center hub and the extension diameter section at middle part, between described inserting paragraph and extension diameter section for and the changeover portion that matches of guiding nozzle tapering.
3. gas-insulated switchgear potting breaker according to claim 2, is characterized in that: it is protruding that the center of described fixed contact main body has the cone extending towards moved end arcing contact direction, and the inside of the profile that described cone is protruding and described guiding nozzle matches.
4. gas-insulated switchgear potting breaker according to claim 3, is characterized in that: described moving contact is connected with the operating mechanism that is produced axial motion by power by actuating push rod.
5. gas-insulated switchgear potting breaker according to claim 4, is characterized in that: described moving contact and fixed contact are covered with respectively radome outward.
6. gas-insulated switchgear potting breaker according to claim 5, is characterized in that: adsorbent equipment is equipped with in the position between the corresponding moving contact in inwall top and the fixed contact of described housing.
7. gas-insulated switchgear potting breaker according to claim 6, is characterized in that: explosion-protection equipment is equipped with in the position between the corresponding moving contact in outer wall bottom and the fixed contact of described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410085208.8A CN103839728A (en) | 2014-03-10 | 2014-03-10 | Tank-type breaker for gas insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410085208.8A CN103839728A (en) | 2014-03-10 | 2014-03-10 | Tank-type breaker for gas insulated switchgear |
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| Publication Number | Publication Date |
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| CN103839728A true CN103839728A (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410085208.8A Pending CN103839728A (en) | 2014-03-10 | 2014-03-10 | Tank-type breaker for gas insulated switchgear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405721A (en) * | 2015-11-12 | 2016-03-16 | 成都格瑞思文化传播有限公司 | Tank-type circuit breaker |
| CN106504940A (en) * | 2016-12-23 | 2017-03-15 | 中国西电电气股份有限公司 | A kind of double acting contact transmission device of breaker |
| CN107564758A (en) * | 2017-07-31 | 2018-01-09 | 许继集团有限公司 | A kind of high-voltage switch gear and its double acting transmission system |
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| CN101770894A (en) * | 2008-12-31 | 2010-07-07 | Ls产电株式会社 | High voltage gas circuit breaker |
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2014
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Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0809269A2 (en) * | 1996-05-24 | 1997-11-26 | Siemens Aktiengesellschaft | High voltage circuit breaker with two driven switch contact pieces |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405721A (en) * | 2015-11-12 | 2016-03-16 | 成都格瑞思文化传播有限公司 | Tank-type circuit breaker |
| CN106504940A (en) * | 2016-12-23 | 2017-03-15 | 中国西电电气股份有限公司 | A kind of double acting contact transmission device of breaker |
| CN107564758A (en) * | 2017-07-31 | 2018-01-09 | 许继集团有限公司 | A kind of high-voltage switch gear and its double acting transmission system |
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Application publication date: 20140604 |
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