CN202758806U - Vacuum circuit breaker - Google Patents
Vacuum circuit breaker Download PDFInfo
- Publication number
- CN202758806U CN202758806U CN 201220383411 CN201220383411U CN202758806U CN 202758806 U CN202758806 U CN 202758806U CN 201220383411 CN201220383411 CN 201220383411 CN 201220383411 U CN201220383411 U CN 201220383411U CN 202758806 U CN202758806 U CN 202758806U
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- Prior art keywords
- vacuum interrupter
- guide rod
- vacuum
- rod
- piston
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Abstract
Provided is a vacuum circuit breaker, comprising vacuum arc extinguish chambers. Each phase of the vacuum circuit breaker is provided with a firs vacuum arc extinguish chamber and a second vacuum arc extinguish chamber in series connection. A static guide rod of the firs vacuum arc extinguish chamber and a static guide rod of the second vacuum arc extinguish chamber are in connection with a fixed mount; a dynamic guide rod of the second vacuum arc extinguish chamber is in connection with a connecting rod; a tail end of the connecting rod is in connection with a cylinder sleeve, the inner of which is provided with a piston; a moving direction of the piston is consistent with a moving direction of the dynamic guide rod of the second vacuum arc extinguish chamber and the dynamic guide rod of the firs vacuum arc extinguish chamber; the piston is in connection with a piston rod which extends out of the cylinder sleeve. A moving rack is also included and is used for driving the piston rod and the dynamic guide rod of the firs vacuum arc extinguish chamber to move; the moving rack is in connection with the piston rod and the dynamic guide rod of the first firs vacuum arc extinguish chamber. The vacuum circuit breaker can separate a cut-off performance from an anti-fusion-welding performance and can effectively raise an anti-fusion-welding performance of a vacuum arc extinguish chamber and reduce capacitive current cut-off restrike probability of the vacuum arc extinguish chamber.
Description
(1) technical field
The utility model relates to a kind of vacuum circuit-breaker.
(2) background technology
Vacuum circuit-breaker generally comprise a vacuum interrupter, vacuum interrupter comprises a confined space that is made of insulation crust, moved end end cap, quiet end end cap, confined space inside is vacuum state.Moving guide rod driven end end cap passes, and quiet guide rod sound end end cap passes.The end of moving guide rod is provided with moving contact, and the end of quiet guide rod is provided with fixed contact, and moving contact is relative with fixed contact and all be positioned at confined space.Moving guide rod motion makes moving contact contact with fixed contact during combined floodgate, and moving guide rod motion makes moving contact separate with fixed contact during separating brake.
In middle pressure reactive compensation system running, frequent because of electrical network loading condition fluctuation, for the Adjustment System power factor (PF), reduce harmonic wave, burning voltage and reduce the wastage, will drop into continually and excise capacitive load.According to China's operation of power networks experience, the active power of whenever sending 1kW needs the idle normal working voltage that just can keep electrical network of 1.2kvar～1.4kvar.According to the foreign study investigation, vacuum circuit-breaker is applied to the capacity current operation and can reaches 300～700 times every year, and 1～2 time minute operation of closing is namely arranged every day.For operation task so frequently, compared with other gas switchs, the advantage of vacuum circuit-breaker itself is so that it is more applicable for the switching operation of capacitive load in the reactive compensation system.Its advantage: the first, vacuum circuit-breaker has up to ten thousand times mechanical action life-span; The second, contact Maintenance free in the vacuum circuit-breaker running; The 3rd, vacuum circuit-breaker affected by environment little and to environment without any pollution; The 4th, the vacuum extinction chamber interior is little to be opened apart from tolerating high voltage.Thus, the vacuum circuit-breaker capacity current technology of cut-offfing also becomes one of the study hotspot in current International Power switchgear field.Capacitive load is closed the high-frequency of closing meeting generation 4250Hz, 20kA in the process and is shoved, and its prebreakdown electric arc can Partial ablation contact surface also make contact generation melting welding; During interrupting capacitor set, drop-out current has hundreds of A, and this moment, the melting welding zone was pulled open, and then breaking finally forms micro-protuberance in contact surface.After the drop-out current zero passage, the direct current recovery voltage can be born in the vacuum arc-extinguishing chamber contact two ends, and the peak value that cut-offs single-phase electricity container group or threephase load neutral grounding capacitor group can reach 2 times of system voltage U
m, the peak value that cut-offs threephase load isolated neutral capacitor group can reach 2.5 times of system voltage U
mThis be so that re-breakdown phenomenon may occur in vacuum circuit-breaker after cut-offfing capacity current, even the drop-out current zero passage re-breakdown phenomenon of still can delaying time after several seconds.And overvoltage meeting badly damaged switch itself and other power system devices of generation are worn in bang, even cause casualties.
Waiting people's statistics to draw the bang of 40.5kV vacuum interrupter according to Lee of experiment station, Shaoxing electricity, to wear probability very high, generally more than 5%, make moderate progress after 2002, be down to 2.6% (present situation of vacuum circuit-breaker opening-closing capacitor bank performance and countermeasure. High-Voltage Electrical Appliances .Vol.39, No.5, pp44-46.2003).The high frequency that produces in the reason that at present research discovery generation bang is worn and the switching process shoves closely related, reason is that high frequency shoves meeting in making process, and the Partial ablation contact surface makes contact generation melting welding, broken ring contact surface structure has increased contact surface field emission factor beta.
Studies show that inevitable contacting arranged between inrush phenomenon and the re-breakdown phenomenon, the dielectric voltage withstand level that the bang generation of wearing depends mainly on the vacuum circuit-breaker capacity current after cut-offfing, and the dielectric strength that vacuum circuit-breaker shoves in the combined floodgate Preliminary breakdown process and understands the ablative degradation contact surface and then affect vacuum interrupter, so inrush phenomenon becomes the principal element that initiation vacuum circuit-breaker capacity current cut-offs re-breakdown phenomenon.
(3) summary of the invention
In order to overcome the more serious deficiency of vacuum interrupter re-breakdown phenomenon of existing vacuum circuit-breaker, the utility model provides a kind of electric current with vacuum interrupter to cut-off purpose, the reduction vacuum interrupter that function and resistance fusion welding can separate with the capacitive load switching of realizing vacuum interrupter and thumps and wear the vacuum circuit-breaker of rate.
The technical scheme in the invention for solving the technical problem is: a kind of vacuum circuit-breaker, comprise vacuum interrupter, each of described vacuum circuit-breaker all has two vacuum interrupters mutually, be respectively the first vacuum interrupter and the second vacuum interrupter, described the first vacuum interrupter and the series connection of the second vacuum interrupter;
The quiet guide rod of described the first vacuum interrupter and the quiet guide rod of the second vacuum interrupter are connected with a fixed support;
The moving guide rod of described the second vacuum interrupter is connected with a connecting rod, the end of described connecting rod is connected with a cylindrical sleeves, be provided with piston in the described cylindrical sleeves, the direction of motion of the direction of motion of the traffic direction of described piston and the moving guide rod of described the second vacuum interrupter, the moving guide rod of the first vacuum interrupter is consistent;
Described piston is connected with piston rod, and described piston rod stretches out outside the described cylindrical sleeves;
Comprise that also described moving support is connected with the moving guide rod of described piston rod and the first vacuum interrupter be used to the moving support of the moving guide rod motion that drives described piston rod and the first vacuum interrupter.
In making process, first the first vacuum interrupter is closed a floodgate, and then the second vacuum interrupter closed a floodgate: the moving support of operation, the first vacuum interrupter directly closes a floodgate under mechanism's effect, the moving guide rod of the second vacuum interrupter keeps motionless, behind the other end of cylindrical sleeves, the moving guide rod that promotes the second vacuum interrupter begins to close a floodgate, and closes after the realization at piston movement; In the separating brake process, the first vacuum interrupter is direct separating brake under mechanism's effect, and the moving guide rod of the second vacuum interrupter keeps motionless,, drives the moving guide rod of the second vacuum interrupter and begins separating brake behind the other end of cylindrical sleeves at piston movement, realizes rear minute.
Can close first and close the first vacuum interrupter so that the second vacuum interrupter closes after than the first vacuum interrupter in making process, the not conducting of circuit this moment is without any electric current appearance.Then close and close the second vacuum interrupter, when the dynamic/static contact of the second vacuum interrupter moves to certain position, when the dielectric strength between contact will be lower than the voltage that is applied between contact, prebreakdown electric arc will produce on the second vacuum arc-extinguishing chamber contact surface, and the ablative degradation contact surface; Melting welding can occur in the second vacuum arc-extinguishing chamber contact surface after contact closure, and the destruction that the first vacuum arc-extinguishing chamber contact is shoved.
In the separating brake process can so that the second vacuum interrupter than the first vacuum interrupter after minute, open first the first vacuum interrupter, can form power frequency drop-out current electric arc (400A～1600A), studies show that this electric current has the ageing effect between contact; Behind the current over-zero, recovery voltage can put on the first vacuum arc-extinguishing chamber contact two ends; The destruction of being shoved in cause the first vacuum arc-extinguishing chamber contact surface is so have good withstand voltage properties.Then open the second vacuum interrupter, use the low bang of double-fracture technique guarantee and wear probability.
Fixed support described in the present embodiment comprises the head rod that is connected with the quiet guide rod of described the first vacuum interrupter, the second connecting rod that is connected with the quiet guide rod of described the second vacuum interrupter, also comprise fixed lever, the afterbody of the afterbody of described head rod, the second connecting rod all is connected with described fixed lever.
The utility model also has following additional technical feature: described head rod is provided with the first spring spool, is provided with the first spring in described the first spring spool, and the quiet guide rod of described the first vacuum interrupter is connected with the end of described the first spring.
Be provided with the second spring between the moving guide rod of described moving support and described the first vacuum interrupter.
Described the second spring is located in the second spring spool, and described the second spring spool is located on the backstay.
Be provided with bolster between described piston and the described cylindrical sleeves.
The beneficial effects of the utility model are: break performance and resistance fusion welding can be separated, wear probability but Effective Raise vacuum interrupter resistance fusion welding can cut-off bang with minimizing vacuum interrupter capacity current.
(4) description of drawings
Fig. 1 is the structural representation of the vacuum circuit-breaker of embodiment one.
Fig. 2 is the structural representation of the vacuum circuit-breaker of embodiment two.
Fig. 3 is the structural representation of the vacuum circuit-breaker of embodiment three
Fig. 4 is the structural representation of the vacuum circuit-breaker of embodiment four.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment one
With reference to Fig. 1, a kind of vacuum circuit-breaker, comprise vacuum interrupter, each of described vacuum circuit-breaker all has two vacuum interrupters mutually, be respectively the first vacuum interrupter 1 and the second vacuum interrupter 2, described the first vacuum interrupter 1 and the second vacuum interrupter series connection 2, the first vacuum interrupter 1 and the second vacuum interrupter 2 vertically arrange side by side in the present embodiment, and the first vacuum interrupter 1 and the second vacuum interrupter 2 all are that quiet guide rod is descending at upper, moving guide rod.
The quiet guide rod 3 of described the first vacuum interrupter and the quiet guide rod 4 of the second vacuum interrupter are connected with a fixed support.In the present embodiment, described fixed support comprises the head rod 5 that is connected with the quiet guide rod 3 of described the first vacuum interrupter, the second connecting rod 6 that is connected with the quiet guide rod 4 of described the second vacuum interrupter, also comprise fixed lever 7, the afterbody of the afterbody of described head rod 5, the second connecting rod 6 all is connected with described fixed lever 7.
The moving guide rod 8 of described the second vacuum interrupter is connected with a connecting rod 9, the end of described connecting rod 9 is connected with a cylindrical sleeves 10, be provided with piston 11 in the described cylindrical sleeves 10, the direction of motion of the direction of motion of the traffic direction of described piston 11 and the moving guide rod 8 of described the second vacuum interrupter, the moving guide rod 12 of the first vacuum interrupter is consistent.
Described piston 11 is connected with piston rod 13, and described piston rod 13 stretches out outside the described cylindrical sleeves 10.Can establish bolster (such as buffer spring) between described piston 11 and the described cylindrical sleeves 10 impacts to reduce.
Comprise that also described moving support 14 is connected with the moving guide rod 12 of described piston rod 13 and the first vacuum interrupter be used to the moving support 14 of moving guide rod 12 motions that drive described piston rod 13 and the first vacuum interrupter.
In making process, first the first vacuum interrupter 1 is closed a floodgate, and then the second vacuum interrupter 2 closed a floodgate: the moving support 14 of operation, the first vacuum interrupter 1 directly closes a floodgate under mechanism's effect, the moving guide rod 8 of the second vacuum interrupter keeps motionless, move to the other end of cylindrical sleeves 10 at piston 11 after, the moving guide rod 8 that promotes the second vacuum interrupter begins to close a floodgate, and closes after the realization; In the separating brake process, the first vacuum interrupter 1 direct separating brake under mechanism effect, the moving guide rod 8 of the second vacuum interrupter keeps motionless, move to the other end of cylindrical sleeves 10 at piston 11 after, drive the moving guide rod 8 beginning separating brakes of the second vacuum interrupter, divide after realizing.
Embodiment two
With reference to Fig. 2, be provided with the first spring spool 15 at head rod 5, be provided with the first spring 16 in described the first spring spool 15, the quiet guide rod 3 of described the first vacuum interrupter is connected with the end of described the first spring 16.All the other structures are identical with embodiment one with execution mode.
Embodiment three
With reference to Fig. 3, be provided with the second spring 17 between the moving guide rod 12 of described moving support 14 and described the first vacuum interrupter.Described the second spring 17 is located in the second spring spool 18, and described the second spring spool 18 is located on the backstay 19.All the other structures are identical with embodiment one with execution mode.
Embodiment four
With reference to Fig. 4, in the present embodiment, the first vacuum interrupter 1 and the second vacuum interrupter 2 horizontally sets, the moving guide rod 12 of the first vacuum interrupter is relative with the moving guide rod 8 of the second vacuum interrupter, moving support 14 contacts between the moving guide rod 8 of the moving guide rod 12 of the first vacuum interrupter and the second vacuum interrupter and with moving guide rod 12, the piston rod 13 of the first vacuum interrupter, and contacted is the inclined-plane, guides the moving guide rod 12 of the first vacuum interrupter, the motion of piston rod 13 by the inclined-plane.All the other structures are identical with embodiment one with execution mode.
Claims (6)
1. vacuum circuit-breaker, comprise vacuum interrupter, it is characterized in that: each of described vacuum circuit-breaker all has two vacuum interrupters mutually, is respectively the first vacuum interrupter and the second vacuum interrupter, described the first vacuum interrupter and the series connection of the second vacuum interrupter;
The quiet guide rod of described the first vacuum interrupter and the quiet guide rod of the second vacuum interrupter are connected with a fixed support;
The moving guide rod of described the second vacuum interrupter is connected with a connecting rod, the end of described connecting rod is connected with a cylindrical sleeves, be provided with piston in the described cylindrical sleeves, the direction of motion of the direction of motion of the traffic direction of described piston and the moving guide rod of described the second vacuum interrupter, the moving guide rod of the first vacuum interrupter is consistent;
Described piston is connected with piston rod, and described piston rod stretches out outside the described cylindrical sleeves;
Comprise that also described moving support is connected with the moving guide rod of described piston rod and the first vacuum interrupter be used to the moving support of the moving guide rod motion that drives described piston rod and the first vacuum interrupter.
2. vacuum circuit-breaker as claimed in claim 1, it is characterized in that: described fixed support comprises the head rod that is connected with the quiet guide rod of described the first vacuum interrupter, the second connecting rod that is connected with the quiet guide rod of described the second vacuum interrupter, also comprise fixed lever, the afterbody of the afterbody of described head rod, the second connecting rod all is connected with described fixed lever.
3. vacuum circuit-breaker as claimed in claim 2, it is characterized in that: described head rod is provided with the first spring spool, be provided with the first spring in described the first spring spool, the quiet guide rod of described the first vacuum interrupter is connected with the end of described the first spring.
4. vacuum circuit-breaker as claimed in claim 1 or 2 is characterized in that: be provided with the second spring between the moving guide rod of described moving support and described the first vacuum interrupter.
5. vacuum circuit-breaker as claimed in claim 4, it is characterized in that: described the second spring is located in the second spring spool, and described the second spring spool is located on the backstay.
6. vacuum circuit-breaker as claimed in claim 1 or 2 is characterized in that: be provided with bolster between described piston and the described cylindrical sleeves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220383411 CN202758806U (en) | 2012-08-03 | 2012-08-03 | Vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220383411 CN202758806U (en) | 2012-08-03 | 2012-08-03 | Vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202758806U true CN202758806U (en) | 2013-02-27 |
Family
ID=47737974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220383411 Expired - Lifetime CN202758806U (en) | 2012-08-03 | 2012-08-03 | Vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202758806U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779682A (en) * | 2012-08-03 | 2012-11-14 | 库柏(宁波)电气有限公司 | Vacuum circuit breaker |
| CN104576176A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | Circuit breaker of arc extinguish chambers in series connection |
-
2012
- 2012-08-03 CN CN 201220383411 patent/CN202758806U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779682A (en) * | 2012-08-03 | 2012-11-14 | 库柏(宁波)电气有限公司 | Vacuum circuit breaker |
| CN104576176A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | Circuit breaker of arc extinguish chambers in series connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130227 Effective date of abandoning: 20150225 |
|
| RGAV | Abandon patent right to avoid regrant |