CN203103209U - Vacuum arc extinguishing chamber and vacuum circuit breaker using same - Google Patents
Vacuum arc extinguishing chamber and vacuum circuit breaker using same Download PDFInfo
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- CN203103209U CN203103209U CN 201320041605 CN201320041605U CN203103209U CN 203103209 U CN203103209 U CN 203103209U CN 201320041605 CN201320041605 CN 201320041605 CN 201320041605 U CN201320041605 U CN 201320041605U CN 203103209 U CN203103209 U CN 203103209U
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Abstract
A vacuum arc extinguishing chamber and a vacuum circuit breaker using the same are disclosed. The vacuum arc extinguishing chamber comprises a housing, a guiding sleeve, a moving electrode, a stationary electrode, and a corrugated pipe, wherein the housing consists of a first metal housing, a second metal housing, and an insulation ring; a vacuum cavity is formed in the vacuum arc extinguishing chamber; the moving electrode comprises a moving contact head and a moving contact head rod, and the moving contact head is arranged in the vacuum cavity; and the stationary electrode comprises a stationary contact head and a stationary contact head rod; the guiding sleeve is sleeved on the moving contact head rod and is fixed with the housing, an end of the corrugated pipe is connected with the moving contact head rod, and the other end is connected with the housing in an air-tight manner. The vacuum arc extinguishing chamber is characterized in that the insulation ring is arranged on the housing and positioned above the moving contact head, and the moving contact head and the stationary contact head are arranged in a surrounding space of the second metal housing when the moving contact head and the stationary contact head are in separated and closed position states. The vacuum arc extinguishing chamber is advantageous in that the corrugated pipe in the vacuum arc extinguishing chamber is protected, and therefore work of the arc extinguishing chamber is reliable and arc extinguishing effects are good, and that the vacuum circuit breaker using the vacuum arc extinguishing chamber is high in breaking capacity and long in electrical life is guaranteed.
Description
Technical field
The utility model belongs to vacuum circuit-breaker technical field in the low-voltage distribution system, is specifically related to a kind of vacuum interrupter and uses the vacuum circuit-breaker of these arc control device.
Background technology
In modern power distribution systems, circuit breaker has the distribution electric energy, the effect of fault harm such as protection power supply and power consumption equipment are avoided transshipping, under voltage, short circuit, ground connection.Wherein, it cut-offs fault current vacuum circuit-breaker, can avoid air pressure, temperature, humidity, pollution that traditional air type circuit breaker is subjected to surrounding environment of living in easily etc. to influence problem, really realized the zero arcing of disjunction whole process, use in the place that being specially adapted to mine, tunnel etc. has flammable explosive gas to produce, and just more and more is subjected to the attention and the welcome in market.
Vacuum interrupter is the core component of vacuum switch electrical equipment, it mainly acts on: by being sealed in the connection and the disjunction of a pair of dynamic and static contact realization power circuit in the vacuum interrupter, and by the good insulation property of vacuum in the pipe, make behind the circuitry cuts electric current blow-out rapidly and suppress electric current, thereby can reliably disconnect normal circuit and disengagement failure circuit.
In the prior art, the structure of vacuum interrupter such as Fig. 1, shown in Figure 2, this vacuum interrupter 5 comprises housing 51, fairlead 52, moving electrode 53, stationary electrode 54 and bellows 55, described housing 51 comprises first metal shell 511 of upper and lower settings, second metal shell 513 and be connected first metal shell 511, dead ring 512 between second metal shell 513, vacuum interrupter 5 inside are formed with vacuum chamber 514, described moving electrode 53 comprises that the moving contact 531 and the end that are arranged in the vacuum chamber 514 are connected with moving contact 531, the other end extends upwardly to the movable contact rod 532 outside the vacuum chamber 514, described stationary electrode 54 comprises that be used for fixed contact 541 and the end corresponding with described moving contact 531 that are arranged in the vacuum chamber 514 are connected with fixed contact 541, the other end extends downward the stationary contact head rod 542 outside the vacuum chamber 514, described fairlead 52 is set on the movable contact rod 532 and with described housing 51 and fixes, and is used for movable contact rod 532 is play the guiding role.One end of described bellows 55 is connected (as adopting the mode of welding) with movable contact rod 532, the other end of described bellows 55 is connected (as welding) with housing 51, to guarantee the vacuum degree of vacuum chamber 514 inside, the effect of bellows 55 is to guarantee that moving electrode 53 moves within the specific limits.Described dead ring 512 is positioned on the housing 51 and the position of close fixed contact 541, its effect is to make first metal shell 511 and 513 insulation of second metal shell, and assurance moving contact 531, fixed contact 541 are guaranteed the circuit disconnection that is connected and can be born correspondent voltage under separated position; In addition, the width of dead ring 512 is unsuitable excessive, and its width requires to be as the criterion to satisfy the circuit dielectric property, and to guarantee that housing 51 has enough big heat conduction and area of dissipation, this point is very important for the low-voltage, high-current vacuum interrupter.
When the certain electric current of disjunction, in the moment that moving contact 531 separates with fixed contact 541, electric current is retracted on several points of contact separation just, make the resistance between contact increase rapidly and cause that temperature raises rapidly, until the contact surface evaporation of metals takes place, form high electric field strength simultaneously, strong electric field cause launching and contact between the puncture in gap, produce vacuum arc.Electric arc spreads to periphery under the action of a magnetic field, simultaneously, red-hot particle spreads to vacuum area from the contact gap, in the gap of moving contact 531, fixed contact 541 and with contact contact-making surface corresponding shell 51 on the zone in (about 30mm scope, be symmetrically distributed along the contact contact-making surface), the concentration of high temperature particle is the highest, becomes to cut-off heat affected area a (as shown in Figure 2).The low-voltage vacuum arc control device are cut-offfing under the situation of big electric current, after the electric arc diffusion is extinguished,, form the electronics heat emission because there is the condition of high temperature of short time in contact surface, can have tens amperes the electric current of utmost point short time in the loop, this electric current that produces owing to the electronics heat emission is called post arc current.Generally, after surperficial heat was delivered to deep layer, the electronics heat emission stopped, and post arc current just can disappear.The vacuum interrupter 5 of prior art, because the tie point between the dead ring 512 and first metal shell 511, second metal shell 513 is in and cut-offs within a of heat affected area, and dead ring 512 is non-conductors of heat, so tie point is subjected to the bombardment of high temperature particle afterwards not as good as heat is promptly conducted, elevate the temperature, cause heat emission.Therefore, the post arc current that electric arc causes is except promptly the first post arc current path b(is as shown in Figure 2 along the gap of 541 of moving contacts 531, fixed contact) directly discharge, promptly the second post arc current path c(is as shown in Figure 2 also another kind of path).Simultaneously, because consideration for miniaturization, do not possess enough electric clearances between the contact of vacuum extinction chamber interior and the housing 51, therefore when breaking current, easily conducting between contact and the housing 51, thereby make post arc current via the second post arc current path c that fixed contact 541 → the first metal shells 511 → bellows 55 → movable contact rod 532 constitutes, make and bear bigger electric current on the bellows 55, thereby cause that temperature raises rapidly.In operate as normal, itself will be delivered to bellows 55 waste heat of movable contact rod 532, and its temperature is raise, if post arc current has a shunting to carry out along above-mentioned path again, causes that so very easily the temperature rise of bellows 55 is too high, thereby influences its fatigue strength.Because the thickness of bellows 55 just very little (0.2mm is following) itself, and during its work between the adjacent layer distance less, when therefore the electric current that flows through is big, easily cause the melting welding between the adjacent layer, and then cause bellows 55 under the mechanical external force effect, to damage, leak gas, vacuum interrupter was lost efficacy.
In view of above-mentioned prior art, be necessary existing vacuum arc extinguish chamber structure is improved, for this reason, the applicant has done actively and effectively to explore, and technical scheme described below produces under this background.
Summary of the invention
The purpose of this utility model is that a kind of vacuum interrupter will be provided, and it can make the bellows of vacuum extinction chamber interior be protected, and makes the work of arc control device more reliable, and arc quenching effect is better; Simultaneously, guaranteed to use the vacuum circuit-breaker of this kind arc control device to have higher breaking capacity and electrical endurance.
The purpose of this utility model reaches like this, a kind of vacuum interrupter, and this vacuum interrupter comprises housing, moving electrode, stationary electrode and bellows; Described housing comprises first metal shell of upper and lower settings, second metal shell and be connected first metal shell, dead ring between second metal shell, enclosure interior is formed with vacuum chamber, described moving electrode comprises that the moving contact and the end that are arranged in the vacuum chamber are connected with moving contact, the other end extends upwardly to the outer movable contact rod of vacuum chamber, described stationary electrode comprise be arranged in the vacuum chamber be used for the fixed contact corresponding with described moving contact and an end is connected with fixed contact, the other end extends downward the outer stationary contact head rod of vacuum chamber, one end of described bellows is connected with movable contact rod, the other end is connected with housing, it is characterized in that: described dead ring is positioned at the top of moving contact, moving contact, fixed contact all is in the encirclement space of second metal shell when separation and make position state.
In a specific embodiment of the present utility model, described dead ring is made by insulating material, and described insulating material is preferably pottery.
In another specific embodiment of the present utility model, described vacuum interrupter also comprises a fairlead, described fairlead is set on the movable contact rod and with described housing and fixes, constitute between described fairlead and the described movable contact rod and be slidingly matched, movable contact rod is play the guiding role by fairlead.
A kind of vacuum circuit-breaker, comprise Shell of circuit breaker, be fixed on operating mechanism on the Shell of circuit breaker, be fixed on last outlet busbar and following outlet busbar on the Shell of circuit breaker, it is characterized in that: described vacuum circuit-breaker also comprises an above-mentioned vacuum interrupter, described vacuum extinction chamber interior moving electrode attended operation mechanism, vacuum extinction chamber interior moving electrode is electrically connected goes up the outlet busbar, and stationary electrode is electrically connected outlet busbar down.
After adopting technique scheme of the present utility model, as shown in Figure 4, among vacuum interrupter, dead ring has cut off post arc current flows to bellows from fixed contact path, avoided flowing through on the bellows when the breaking current risk of post arc current has guaranteed that bellows is in safer operational environment all the time, thereby has guaranteed the smooth work of vacuum interrupter, make the breaking capacity of vacuum circuit-breaker comparatively reliable, and electrical endurance is higher.
During breaking current, produce electric arc between dynamic and static contact and spread to periphery, simultaneously, the high temperature particle spreads to whole vacuum area from the contact gap, in the contact gap and with contact contact-making surface corresponding shell on the zone in (approximately 30mm scope, along the symmetrical distribution of contact contact-making surface), the concentration of high temperature particle is the highest, the heat affected area is cut-off in formation, as shown in Figure 5.At this moment, because the tie point between the dead ring and first metal shell, second metal shell is not in and cut-offs within a of heat affected area, so the heat that cut-offs in a of heat affected area can conduct rapidly by the first good metal shell of thermal conductivity, second metal shell, can not cause the electronics heat emission at this place.Therefore, post arc current only is that the first post arc current path b directly discharges (as shown in Figure 5) along the gap between contact, and vacuum interrupter is arc extinguishing rapidly.Even the electric current of disjunction is big (as 80kA) very, causing cut-offfing the heat affected area enlarges, tie point between the dead ring and first metal shell, second metal shell is in to be cut-off within a of heat affected area, cause this place's generation electronics heat emission and produce post arc current, but because the existence of dead ring, therefore bellows can be not charged, guaranteed that bellows can work smoothly.At this moment, the path of post arc current is the first post arc current path b directly discharges except the gap along between contact, also there is another kind of path, the second post arc current path c(that to be post arc current constitute via moving contact → second metal shell → stationary contact head rod as shown in Figure 5), because second metal shell is made by conduction, thermal conductivity excellent material (as copper), and its surface area is bigger, so second metal shell can conduct electricity and dispel the heat smoothly, can not cause destroying.
In sum; vacuum interrupter of the present utility model can be protected inner bellows when breaking current; compared with prior art; the bellows of vacuum extinction chamber interior has been subjected to protection; make the work of arc control device more reliable; arc quenching effect is better, simultaneously, has guaranteed to use the vacuum circuit-breaker of this kind arc control device to have higher breaking capacity and electrical endurance.
Description of drawings
Fig. 1 is the structural representation of vacuum interrupter in the prior art.
Fig. 2 is the schematic diagram that cut-off heat affected area and post arc current path of vacuum interrupter when breaking current in the prior art.
Fig. 3 is the schematic diagram of a kind of feasible configurations of vacuum circuit-breaker of the present utility model.
Fig. 4 is an example structure schematic diagram of vacuum interrupter of the present utility model.
Fig. 5 is the schematic diagram that cut-off heat affected area and post arc current path of the utility model vacuum interrupter when breaking current.
Among the figure: 1. Shell of circuit breaker; 2. operating mechanism; 3. contact support; 4. go up the outlet busbar; 5. vacuum interrupter, 51. housings, 511. first metal shells, 512. dead rings, 513. second metal shells, 514. vacuum chambers, 52. fairleads, 53. moving electrodes, 531. moving contacts, 532. movable contact rod, 54. stationary electrodes, 541. fixed contacts, 542. stationary contact head rods, 55. bellowss; 6. descend the outlet busbar; A. cut-off the heat affected area; B. the first post arc current path; C. the second post arc current path.
Embodiment
In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; the applicant will describe in detail embodiment of the present utility model below in conjunction with the accompanying drawings; but the applicant is not restriction to technical scheme to the description of embodiment, anyly makes form but not the variation of essence all should be considered as protection range of the present utility model according to the utility model design.
Fig. 3 shows a kind of feasible configurations of the vacuum circuit-breaker of the technical scheme that adopts the utility model patent, the wherein internal structure of vacuum interrupter 5 such as Fig. 4.
Fig. 3 has illustrated a kind of vacuum circuit-breaker, comprise Shell of circuit breaker 1, be fixed on operating mechanism 2 on the Shell of circuit breaker 1, operating mechanism 2 connects contact support 3 on it, be fixed on last outlet busbar 4 and following outlet busbar 6 on the Shell of circuit breaker 1, comprise that also one is fixed on vacuum interrupter 5 on the Shell of circuit breaker 1, described vacuum interrupter 5 inner moving electrodes 53 are supported 3 attended operation mechanisms 2 by contact, vacuum interrupter 5 inner moving electrodes 53 are electrically connected goes up outlet busbar 4, and stationary electrode 54 is electrically connected outlet busbar 6 down.
Fig. 4,5 has illustrated a kind of vacuum interrupter, and this vacuum interrupter 5 comprises housing 51, fairlead 52, moving electrode 53, stationary electrode 54 and bellows 55; Described housing 51 is by first metal shell 511, second metal shell 513 and be connected first metal shell 511, dead ring 512 between second metal shell 513 is formed, vacuum interrupter 5 inside are formed with vacuum chamber 514, described moving electrode 53 comprises that the moving contact 531 and the end that are arranged in the vacuum chamber 514 are connected with moving contact 531, the other end extends to the movable contact rod 532 outside the vacuum chamber 514, described stationary electrode 54 comprises that be used for fixed contact 541 and the end corresponding with described moving contact 531 that are arranged in the vacuum chamber 514 are connected with fixed contact 541, the other end extends to the stationary contact head rod 542 outside the vacuum chamber 514, described fairlead 52 is set on the movable contact rod 532 and with described housing 51 and fixes, one end of described bellows 55 is connected with movable contact rod 532, the other end is connected with housing 51, described dead ring 512 is arranged on the top of moving contact 531, and be positioned at a side of fairlead 52, and corresponding to described movable contact rod 532 outsides.As Figure 4 and 5, when no matter dynamic and static contact 531,541 was make position or detached position, dynamic and static contact 531,541 all was arranged in the encirclement space of second metal shell 513.
When last outlet busbar 4 feeds short circuit current; circuit breaker reacts rapidly; drive vacuum interrupter 5 by mechanism and carry out separating brake; moving contact 531 in the vacuum interrupter 5 separates with fixed contact 541 and produces vacuum arc; when short circuit current when not being very big (＜80kA) the post arc current first post arc current path b shown in Figure 5 along the gap between contact directly discharges; electric arc is extinguished rapidly; even (〉 80kA when short circuit current is very big); post arc current is except that directly discharging in the gap along between contact; also produce the second post arc current path c among path such as Fig. 5; this moment, bellows 55 can not conduct electricity, and was protected.Second metal shell 513 can conduct electricity and dispel the heat smoothly, can not cause the destruction of vacuum interrupter 5, and provides shielding action to arc zone.Therefore the utensil that guaranteed to open circuit has higher breaking capacity and electrical endurance.
In sum, the technical scheme that the utility model provides has overcome the shortcoming in the prior art, has reached the purpose of innovation and creation, has embodied the described technique effect of applicant.
Claims (4)
1. vacuum interrupter, this vacuum interrupter (5) comprises housing (51), moving electrode (53), stationary electrode (54) and bellows (55); Described housing (51) comprises first metal shell (511) of upper and lower settings, second metal shell (513) and be connected first metal shell (511), dead ring (512) between second metal shell (513), housing (51) inside is formed with vacuum chamber (514), described moving electrode (53) comprises that the moving contact (531) and the end that are arranged in the vacuum chamber (514) are connected with moving contact (531), the other end extends upwardly to the outer movable contact rod (532) of vacuum chamber (514), described stationary electrode (54) comprise be arranged in the vacuum chamber (514) be used for the fixed contact (541) corresponding with described moving contact (531) and an end is connected with fixed contact (541), the other end extends downward the outer stationary contact head rod (542) of vacuum chamber (514), one end of described bellows (55) is connected with movable contact rod (532), the other end is connected with housing (51), it is characterized in that: described dead ring (512) is positioned at the top of moving contact (531), moving contact (531), fixed contact (541) all is in the encirclement space of second metal shell (513) when separation and make position state.
2. vacuum interrupter according to claim 1 is characterized in that described dead ring (512) made by insulating material, and described insulating material is preferably pottery.
3. vacuum interrupter according to claim 1, it is characterized in that described vacuum interrupter (5) also comprises a fairlead (52), the movable contact rod (532) that is set in described fairlead (52) goes up and is fixing with described housing (51), constitute between described fairlead (52) and the described movable contact rod (532) and be slidingly matched, movable contact rod (532) is play the guiding role by fairlead (52).
4. vacuum circuit-breaker, comprise Shell of circuit breaker (1), be fixed on operating mechanism (2) on the Shell of circuit breaker (1), be fixed on last outlet busbar (4) and following outlet busbar (6) on the Shell of circuit breaker (1), it is characterized in that: described vacuum circuit-breaker also comprises the vacuum interrupter (5) just like claim 1 or 2 or 3, the inner moving electrode of described vacuum interrupter (5) (53) attended operation mechanism (2), outlet busbar (4) in the inner moving electrode of vacuum interrupter (5) (53) electrical connection, stationary electrode (54) are electrically connected outlet busbar (6) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320041605 CN203103209U (en) | 2013-01-25 | 2013-01-25 | Vacuum arc extinguishing chamber and vacuum circuit breaker using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320041605 CN203103209U (en) | 2013-01-25 | 2013-01-25 | Vacuum arc extinguishing chamber and vacuum circuit breaker using same |
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| Publication Number | Publication Date |
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| CN203103209U true CN203103209U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320041605 Expired - Lifetime CN203103209U (en) | 2013-01-25 | 2013-01-25 | Vacuum arc extinguishing chamber and vacuum circuit breaker using same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943406A (en) * | 2014-04-15 | 2014-07-23 | 西安交通大学 | Rapid multi-gap vacuum disconnector |
| CN106558447A (en) * | 2015-09-30 | 2017-04-05 | 上海良信电器股份有限公司 | A kind of vacuum circuit breaker contact system |
| WO2017161597A1 (en) * | 2016-03-23 | 2017-09-28 | 周晓默 | Novel arc extinguishing chamber |
| CN108320998A (en) * | 2018-03-27 | 2018-07-24 | 西安交通大学 | It is a kind of that there is the unidirectional switch and its driving method for closing sub-electrode structure |
| CN108878209A (en) * | 2018-09-03 | 2018-11-23 | 厦门大恒科技有限公司 | A kind of miniature circuit breaker of internally provided with vacuum contact head mechanism |
| CN109841446A (en) * | 2019-01-07 | 2019-06-04 | 宏秀电气有限公司 | Breaker on one or two fusion serial columns |
| WO2021190666A1 (en) * | 2020-04-03 | 2021-09-30 | 郭桥石 | Arc extinguishing device |
-
2013
- 2013-01-25 CN CN 201320041605 patent/CN203103209U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943406A (en) * | 2014-04-15 | 2014-07-23 | 西安交通大学 | Rapid multi-gap vacuum disconnector |
| CN103943406B (en) * | 2014-04-15 | 2015-12-02 | 西安交通大学 | A kind of Multiple level vacuum interrupter |
| CN106558447A (en) * | 2015-09-30 | 2017-04-05 | 上海良信电器股份有限公司 | A kind of vacuum circuit breaker contact system |
| CN106558447B (en) * | 2015-09-30 | 2018-12-25 | 上海良信电器股份有限公司 | A kind of vacuum circuit breaker contact system |
| WO2017161597A1 (en) * | 2016-03-23 | 2017-09-28 | 周晓默 | Novel arc extinguishing chamber |
| CN108320998A (en) * | 2018-03-27 | 2018-07-24 | 西安交通大学 | It is a kind of that there is the unidirectional switch and its driving method for closing sub-electrode structure |
| CN108878209A (en) * | 2018-09-03 | 2018-11-23 | 厦门大恒科技有限公司 | A kind of miniature circuit breaker of internally provided with vacuum contact head mechanism |
| CN108878209B (en) * | 2018-09-03 | 2024-05-14 | 厦门大恒科技有限公司 | Miniature circuit breaker with built-in vacuum contact mechanism |
| CN109841446A (en) * | 2019-01-07 | 2019-06-04 | 宏秀电气有限公司 | Breaker on one or two fusion serial columns |
| WO2021190666A1 (en) * | 2020-04-03 | 2021-09-30 | 郭桥石 | Arc extinguishing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |