CN202102959U - Circuit breaker arc-extinguishing chamber - Google Patents
Circuit breaker arc-extinguishing chamber Download PDFInfo
- Publication number
- CN202102959U CN202102959U CN 201120182659 CN201120182659U CN202102959U CN 202102959 U CN202102959 U CN 202102959U CN 201120182659 CN201120182659 CN 201120182659 CN 201120182659 U CN201120182659 U CN 201120182659U CN 202102959 U CN202102959 U CN 202102959U
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- chamber
- pressure
- storage chamber
- piston
- plenum chamber
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Abstract
The utility model discloses a circuit breaker arc-extinguishing chamber which comprises a fixed contact module (10), a movable contact module (12), a pressure cylinder (14), a piston (18), a gas storage chamber (22), and a valve unit. A pressure chamber (20) is formed between the piston (18) and the pressure cylinder (14); the movable contact module (12) and the pressure cylinder (14) are connected together; the valve unit is arranged between the pressure chamber (20) and the gas storage chamber (22); when the pressure difference between the pressure chamber (20) and the gas storage chamber (22) is higher than a pre-set value, gas in the pressure chamber is charged in the gas storage chamber, and when the pressure of the gas storage chamber is higher than that of the pressure chamber, the gas in the gas storage chamber is recharged into the pressure chamber, so as to realize the sequential storage and recharge process to the gas of the pressure chamber by the gas storage chamber, and achieve the technical effects that over-high air pressure generated in the pressure chamber when the circuit breaker is opened is avoided, the operation power of an operating mechanism is lowered, the effective air-blowing time to arc is prolonged, the open/close capability of the circuit breaker and the product reliability are improved, and the cost of the operating mechanism is lowered.
Description
Technical field
The utility model relates to a kind of arc-extinguishing chamber of circuit breaker.
Background technology
Circuit breaker air pressing type arc control device are to accomplish the extinguishing of electric arc to produce air-flow by the gas of compression in the plenum chamber, and existing arc-extinguishing chamber of circuit breaker comprises fixed contact module, motive contact module, air cylinder and piston, forms plenum chamber between this piston and air cylinder.This motive contact module and air cylinder link together and drive the relative piston activity of motive contact module through air cylinder, to change the plenum chamber volume.During sub-switching operation, the indoor gas of calming the anger is compressed, and arc burning causes gas to expand, and makes that the gas pressure in the plenum chamber rises.When the pressure of the indoor gas of calming the anger was elevated to an optimum value (critical pressure), extinguish arcs can reach optimum efficiency, as long as in the process of extinguish arcs, keep this pressure just can obtain optimum efficiency.Yet thing is really not so, and along with the indoor gas of calming the anger is constantly increased by the energy of constantly compression arc burning, the gas pressure in the plenum chamber continues rising and just become inevitable; When the pressure of air cylinder reaches very high; Will produce very strong cylinder counter-force and hinder the separating brake motion of circuit breaker, even opening velocity is reduced to zero, shown in stroke curve in the oscillogram of accompanying drawing 1 and accompanying drawing 2; Tangible stagnation is arranged in the breaker open operation motion process, even bounce-back.
For overcoming this cylinder counter-force, just need big, the baroque heavy operating mechanism of adapted operating work, could accomplish the breaker open operation operation like hydraulic mechanism.But show that according to investigation hydraulic mechanism usually can produce leakage problem, and price is higher relatively.
To above-mentioned deficiency; At present one of normal method of using is: pressure that will the too high indoor gas of calming the anger (like the setting pressure relief valve) is by some way drained it, though such way has reduced the pressure in the plenum chamber, has also reduced the interior gaseous mass of plenum chamber simultaneously; Gas density in the spout is reduced; Insulation property reduce, and the gas in later stage blows the electric arc ability drop, slatterns the gas that is used for extinguish arcs.
To above-mentioned deficiency; Two of the normal method of using are at present: the residual volume that directly increases plenum chamber; Though such way can limit the pressure that cut-offs the indoor gas of calming the anger when big electric current is grown arcing; But when cut-offfing the short arcing of little electric current, can there be the problem with the air pressure deficiency that rises slowly of gas pressure in the plenum chamber.
The utility model content
The utility model provides a kind of arc-extinguishing chamber of circuit breaker, and it has overcome the existing deficiency of circuit breaker air pressing type arc control device in the background technology.
The utility model solves one of technical scheme that is adopted of its technical problem:
A kind of arc-extinguishing chamber of circuit breaker; It comprises fixed contact module (10), motive contact module (12), air cylinder (14) and piston (18); Form plenum chamber (20) between this piston (18) and air cylinder (14), this motive contact module (12), air cylinder (14) link together and air cylinder (14) piston (18) activity relatively; It is characterized in that: it also comprises air storage chamber (22) and valve unit, and this valve unit is located between plenum chamber (20) and air storage chamber (22) and comprises and opening when a pressure differential when plenum chamber (20) and air storage chamber (22) is higher than preset value so that this plenum chamber (20) gas charges into unidirectional valve (28) and a valve (30) when air storage chamber (22) pressure is higher than plenum chamber (20) pressure of air storage chamber (22) opens so that this air storage chamber (22) gas recharges the valve (30) of plenum chamber (20).
Among one preferred embodiment: be installed with storage cover (24) behind this piston (18), this storage cover (24) and piston (18) cooperate forms air storage chamber (22).
Among one preferred embodiment: this valve unit is installed in piston (18).
Among one preferred embodiment: this air storage chamber (22) is also established a valve (26).
Among one preferred embodiment: this fixed contact module (10) comprises a quiet main contact (32) and a quiet arc contact (34); This motive contact module (12) is installed in air cylinder (14) and comprises a moving main contact (36), a moving arcing contact (38), a big spout (40) and a little spout (42), and this big spout (40) is connected plenum chamber (20) with little spout (42).
Among one preferred embodiment: it also comprises a support bar (44), and this air cylinder (14) has a cylinder part and a pull bar part, and this pull bar partly is slidingly connected in the support bar (44), affixed piston of this support bar (44) (18) and hermetically passing storage cover (24).
Two of the technical scheme that is adopted of its technical problem of the utility model solution is:
A kind of arc-extinguishing chamber of circuit breaker; It comprises fixed contact module (10), motive contact module (12), air cylinder (14) and piston (18); Form plenum chamber (20) between this piston (18) and air cylinder (14), this motive contact module (12) and air cylinder (14) link together and air cylinder (14) piston (18) activity relatively; It is characterized in that: it also comprises air storage chamber (22) and valve unit, and this valve unit is located between plenum chamber (20) and air storage chamber (22) and comprises and opening when the pressure when plenum chamber (20) is higher than preset value so that this plenum chamber (20) gas charges into unidirectional valve (28) and a valve (30) when air storage chamber (22) pressure is higher than plenum chamber (20) pressure of air storage chamber (22) opens so that this air storage chamber (22) gas recharges the valve (30) of plenum chamber (20).
The present technique scheme is compared with background technology, and it has following advantage:
1, when being higher than preset value (or plenum chamber pressure) plenum chamber gas charges into air storage chamber when the pressure differential of plenum chamber and air storage chamber is higher than preset value; Air storage chamber gas recharges plenum chamber when air storage chamber pressure is higher than plenum chamber pressure; Can realize that then air storage chamber is to storage earlier of plenum chamber gas and the anti-process of mending in back; Then can overcome the existing technical problem of background technology; And produce following technique effect: a. and avoid that plenum chamber produced hyperbar when breaker open operation, improve breaking capacity of breaker and product reliability; B. make to act on and hinder the air chamber counter-force that separating brake carries out in the plenum chamber and reduce, reduce the operating work of operating mechanism, reduce the cost of operating mechanism; C. prolong effective air-blowing time, increase arc blow-out ability, improve breaking capacity of breaker and product reliability arc control device electric arc to electric arc; D. reduce gas temperature in the plenum chamber, help preventing thermal breakdown; E. reach little operating work and extinguish the effect of large power electric arc.
2, be installed with storage cover behind this piston, this storage cover and piston cooperate forms air storage chamber, rationally distributed.
3, this valve unit is installed in piston, and is simple in structure, and cost is low.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 has illustrated that the switch of traditional air pressing type arc control device cut-offs the middle arcing oscillogram of mode in the background technology, wherein: 1-stroke curve, 2-recovery voltage, 3-drop-out current.
Fig. 2 has illustrated that the switch of traditional air pressing type arc control device cut-offs the long arcing oscillogram of mode in the background technology, wherein: 1-stroke curve, 2-recovery voltage, 3-drop-out current.
Fig. 3 has illustrated the structural representation of the arc control device of a preferred embodiment, and this moment, circuit breaker was in closing position.
Fig. 4 has illustrated the structural representation of the arc control device of a preferred embodiment, and this moment, circuit breaker was in the separating brake position.
Embodiment
Please refer to Fig. 3 and Fig. 4, arc-extinguishing chamber of circuit breaker, it comprises fixed contact module 10, motive contact module 12, air cylinder 14, piston 18, air storage chamber 22 and valve unit.
This fixed contact module 10 comprises a coaxial quiet main contact 32 and a quiet arc contact 34 that is solid-located.
This motive contact module 12 comprises moving main contact 36, a moving arcing contact 38, one big spout 40 and a little spout 42.Among the present embodiment, said motive contact module 12 matches with fixed contact module 10, and can control contact and disconnection through relative motion.Among the present embodiment, said moving main contact 36 and quiet main contact 32 are suitable, and said moving arcing contact 38 is suitable with quiet arc contact 34.
This air cylinder 14 has a cylinder part and a pull bar part, and this cylinder part comprises that perisporium and is located at the front stall of perisporium front end, and said motive contact module 12 is installed on the air cylinder 14, and said big spout 40 is also connected plenum chamber 20 with little spout 42.This pull bar partly is enclosed in the cylinder part, and is fixed in the front stall center of cylinder part.Among the present embodiment, this cylinder part and pull bar part are one-body molded, but not as limit, said as required cylinder part and pull bar part also can be made earlier again and be connected.
Set firmly a storage cover 24 behind this piston 18, this storage cover 24 cooperates with piston 18 and forms air storage chamber 22.These piston 18 rear center positions set firmly a hollow support rails 44, and these support bar 44 back-end sealings pass storage cover 24, and this support bar 44 is affixed relatively with storage cover 24.
Among the present embodiment, the sealing of the perisporium of this air cylinder 14 is slided and is surrounded piston 18, makes 14 formation plenum chambers 20 of this piston 18 and air cylinder.
This air cylinder 14 front stalls and motive contact module 12 is fixed together and partly drive cylinder part and motive contact module 12 relative piston 18 activities through pull bar are to change plenum chamber 20 volumes.Among the present embodiment, this pull bar part back-end sealing slides and puts in support bar 44 mesopores, and attended operation mechanism.
This valve unit is located at 22 of plenum chamber 20 and air storage chambers, and among the present embodiment, this valve unit is installed in piston 18.This valve unit comprises a unidirectional valve 28 and a valve 30; Unidirectional valve 28 is opened when the pressure differential of plenum chamber 20 and air storage chamber 22 is higher than preset value, and these plenum chamber 20 gases charge into air storage chamber 22; Valve 30 is opened when air storage chamber 22 pressure are higher than plenum chamber 20 pressure, and these air storage chamber 22 gases recharge plenum chamber 20.Among the present embodiment; Being provided with of this preset value can consider to make plenum chamber pressure in the arc extinction process, to remain on about 1～2 times of critical pressure scope; But not as limit, those skilled in the art can select suitable preset value according to model, the characteristics of selected circuit breaker.
Among the present embodiment, best, also establish a valve 26 at this air storage chamber 22, when making automatic reclosing, there is sufficient gas to be present in the plenum chamber to guarantee circuit breaker.
Please refer to Fig. 3 and Fig. 4, when breaker open operation began, pull bar partly drove the motion backward together of motive contact module 12, cylinder part, and the gas in the plenum chamber 20 is compressed, and adds that arc burning causes gas to expand, and gas pressure rises in the plenum chamber 20.When cut-offfing little electric current, because arc energy is little, the gas pressure rising can be very not high in the plenum chamber 20, and the pressure P 1 of plenum chamber 20 is not enough to open check valve 28 with the pressure differential that air storage chamber pressure P 2 forms, and plenum chamber 20 is in isolation with air storage chamber 22.When cut-offfing big electric current, because arc energy is big, gas pressure rises very high in the plenum chamber 20; The pressure differential that the pressure P 1 of plenum chamber 20 and air storage chamber pressure P 2 form can open check valve 28, and after unidirectional valve 28 was opened, the gas of plenum chamber 20 imported in the air storage chamber 22; The pressure P 1 and the temperature T 1 of plenum chamber 20 all begin to descend, and air storage chamber 22 pressure P 2 rise with temperature T 2; When air cylinder 14 continuation motion quiet arc contacts no longer stop up big spout; Gas vomits from spout in the plenum chamber 20, and the pressure P 1 of plenum chamber 20 descends and valve 30 unlatchings when being lower than air storage chamber 22 pressure P 2, and the gas in the air storage chamber 22 recharges in the plenum chamber 20; Continue as arc blow-out blast pressure is provided, prolong the arc blow-out time.
Among the present embodiment,, therefore can replace hydraulic operating mechanism, have considerable economy with spring operating mechanism owing to reduced the operating work of mechanism.
Among another preferred embodiment, it and a last preferred embodiment difference are: unidirectional valve 28 is opened when the pressure of plenum chamber 20 is higher than preset value.
The above is merely preferred embodiment of the present invention, so can not limit the scope that the present invention implements according to this, the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that the present invention contains.
Claims (7)
1. arc-extinguishing chamber of circuit breaker; It comprises fixed contact module (10), motive contact module (12), air cylinder (14) and piston (18); Form plenum chamber (20) between this piston (18) and air cylinder (14), this motive contact module (12) and air cylinder (14) link together and air cylinder (14) piston (18) activity relatively; It is characterized in that: it also comprises air storage chamber (22) and valve unit, and this valve unit is located between plenum chamber (20) and air storage chamber (22) and comprises and opening when a pressure differential when plenum chamber (20) and air storage chamber (22) is higher than preset value so that this plenum chamber (20) gas charges into unidirectional valve (28) and a valve (30) when air storage chamber (22) pressure is higher than plenum chamber (20) pressure of air storage chamber (22) opens so that this air storage chamber (22) gas recharges the valve (30) of plenum chamber (20).
2. a kind of arc-extinguishing chamber of circuit breaker according to claim 1 is characterized in that: be installed with storage cover (24) behind this piston (18), this storage cover (24) and piston (18) cooperate forms air storage chamber (22).
3. a kind of arc-extinguishing chamber of circuit breaker according to claim 2 is characterized in that: this valve unit is installed in piston (18).
4. a kind of arc-extinguishing chamber of circuit breaker according to claim 1 is characterized in that: this air storage chamber (22) is also established a valve (26).
5. according to claim 2 or 3 or 4 described a kind of arc-extinguishing chamber of circuit breaker, it is characterized in that: this fixed contact module (10) comprises a quiet main contact (32) and a quiet arc contact (34); This motive contact module (12) is installed in air cylinder (14) and comprises a moving main contact (36), a moving arcing contact (38), a big spout (40) and a little spout (42), and this big spout (40) is connected plenum chamber (20) with little spout (42).
6. a kind of arc-extinguishing chamber of circuit breaker according to claim 5; It is characterized in that: it also comprises a support bar (44); This air cylinder (14) has a cylinder part and a pull bar part; This pull bar partly is slidingly connected in the support bar (44), affixed piston of this support bar (44) (18) and hermetically passing storage cover (24).
7. arc-extinguishing chamber of circuit breaker; It comprises fixed contact module (10), motive contact module (12), air cylinder (14) and piston (18); Form plenum chamber (20) between this piston (18) and air cylinder (14), this motive contact module (12) and air cylinder (14) link together and air cylinder (14) piston (18) activity relatively; It is characterized in that: it also comprises air storage chamber (22) and valve unit, and this valve unit is located between plenum chamber (20) and air storage chamber (22) and comprises and opening when the pressure when plenum chamber (20) is higher than preset value so that this plenum chamber (20) gas charges into unidirectional valve (28) and a valve (30) when air storage chamber (22) pressure is higher than plenum chamber (20) pressure of air storage chamber (22) opens so that this air storage chamber (22) gas recharges the valve (30) of plenum chamber (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120182659 CN202102959U (en) | 2011-06-01 | 2011-06-01 | Circuit breaker arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120182659 CN202102959U (en) | 2011-06-01 | 2011-06-01 | Circuit breaker arc-extinguishing chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102959U true CN202102959U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120182659 Expired - Lifetime CN202102959U (en) | 2011-06-01 | 2011-06-01 | Circuit breaker arc-extinguishing chamber |
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| CN (1) | CN202102959U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306590A (en) * | 2011-06-01 | 2012-01-04 | 厦门华电开关有限公司 | Arc extinguishing chamber of circuit breaker |
| CN104299841A (en) * | 2014-04-25 | 2015-01-21 | 国家电网公司 | Arc extinguishing chamber and circuit breaker using mechanism |
| CN104319169A (en) * | 2014-04-25 | 2015-01-28 | 国家电网公司 | Arc extinguishing chamber and circuit breaker employing same |
| CN104319169B (en) * | 2014-04-25 | 2016-11-30 | 国家电网公司 | Arc-chutes and use the chopper of these arc-chutes |
| CN107077988A (en) * | 2014-06-02 | 2017-08-18 | Abb瑞士股份有限公司 | High voltage puffer circuit breaker and the breaker unit with this puffer circuit breaker |
| CN110838420A (en) * | 2018-08-15 | 2020-02-25 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
| CN110838421A (en) * | 2018-08-15 | 2020-02-25 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
-
2011
- 2011-06-01 CN CN 201120182659 patent/CN202102959U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306590A (en) * | 2011-06-01 | 2012-01-04 | 厦门华电开关有限公司 | Arc extinguishing chamber of circuit breaker |
| WO2012163068A1 (en) * | 2011-06-01 | 2012-12-06 | 厦门华电开关有限公司 | Arc extinguishing chamber for circuit breaker |
| CN102306590B (en) * | 2011-06-01 | 2013-08-28 | 厦门华电开关有限公司 | Arc extinguishing chamber of circuit breaker |
| CN104299841A (en) * | 2014-04-25 | 2015-01-21 | 国家电网公司 | Arc extinguishing chamber and circuit breaker using mechanism |
| CN104319169A (en) * | 2014-04-25 | 2015-01-28 | 国家电网公司 | Arc extinguishing chamber and circuit breaker employing same |
| CN104319169B (en) * | 2014-04-25 | 2016-11-30 | 国家电网公司 | Arc-chutes and use the chopper of these arc-chutes |
| CN107077988A (en) * | 2014-06-02 | 2017-08-18 | Abb瑞士股份有限公司 | High voltage puffer circuit breaker and the breaker unit with this puffer circuit breaker |
| CN110838420A (en) * | 2018-08-15 | 2020-02-25 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
| CN110838421A (en) * | 2018-08-15 | 2020-02-25 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
| CN110838421B (en) * | 2018-08-15 | 2022-03-29 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
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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: 20120104 Effective date of abandoning: 20130828 |
|
| RGAV | Abandon patent right to avoid regrant |