CN110838420A - Circuit breaker and arc extinguish chamber thereof - Google Patents
Circuit breaker and arc extinguish chamber thereof Download PDFInfo
- Publication number
- CN110838420A CN110838420A CN201810929457.9A CN201810929457A CN110838420A CN 110838420 A CN110838420 A CN 110838420A CN 201810929457 A CN201810929457 A CN 201810929457A CN 110838420 A CN110838420 A CN 110838420A
- Authority
- CN
- China
- Prior art keywords
- chamber
- expansion chamber
- pressure
- circuit breaker
- storage chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/22—Selection of fluids for arc-extinguishing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
Abstract
The invention relates to a circuit breaker and an arc extinguish chamber thereof, wherein the arc extinguish chamber comprises a main nozzle and an expansion chamber communicated with the main nozzle, an air storage chamber is arranged in the expansion chamber, and a damping structure communicated with the air storage chamber and the expansion chamber is arranged on the wall of the air storage chamber. The pressure in the expansion chamber begins to rise at the initial stage of switching off of the arc extinguish chamber, and when the pressure in the expansion chamber is greater than the pressure in the gas storage chamber, the gas in the expansion chamber enters the gas storage chamber through the damping hole to release partial pressure; when the separating brake is close to the end, the pressure in the expansion chamber is rapidly reduced, when the pressure in the expansion chamber is smaller than the pressure in the air storage chamber, the air in the air storage chamber enters the expansion chamber through the damping hole, the certain air blowing capacity is still ensured at the last stage of the separating brake, the on-off of the circuit breaker is ensured, and the problems that the air blowing capacity of the expansion chamber at the last stage of the separating brake is insufficient and the circuit breaker is not favorable for the on-off of the circuit breaker in the prior art.
Description
Technical Field
The invention relates to a circuit breaker and an arc extinguish chamber thereof.
Background
At high pressure of SF6In the research and development of the arc extinguish chamber of the circuit breaker, the current development trend is to reduce the cost, reduce the operation power and improve the reliability of the operating mechanism, so that the existing arc extinguish chamber, particularly the arc extinguish chamber with the super-voltage and extra-high voltage level is required to be converted from a pneumatic structure to a self-energy structure. The self-energy arc extinguish chamber has the advantages that when a large current is cut off, the gas in the expansion chamber is heated and pressurized under the action of electric arc energy, and strong air blowing is provided at the moment when the electric arc is extinguished, so that the purpose of arc extinction is achieved. Meanwhile, after a certain pressure is built up in the expansion chamber, the valve plate between the expansion chamber and the air compression chamber is closed, the two air chambers are isolated, and lower air pressure is maintained in the air compression chamber, so that the mechanism does not need larger operation power.
Chinese patent with publication number CN201315287Y and publication date 2009.09.23 discloses a dual-chamber thermal expansion self-energy sulfur hexafluoride breaker arc extinguish chamber and a cylinder thereof, as shown in fig. 1, the arc extinguish chamber includes a piston rod 9, a cylinder, and a thermal expansion chamber 6 and a pressure air chamber 8 isolated from each other, the cylinder of the cylinder is composed of a pressure air chamber cylinder 7 with a closed and fixed bottom and a thermal expansion chamber cylinder 5 slidably inserted in the pressure air chamber cylinder 7, and the top of the thermal expansion chamber cylinder 5 is provided with a main nozzle, i.e. the nozzle 1 shown in fig. 1. The bottom of the thermal expansion chamber cylinder 5 is sealed with a partition plate 11, the partition plate 11 is provided with a check valve 12 which is opened and closed according to the thermal expansion airflow pressure generated by electric arc, the upper end of the piston rod 9 is inserted into the thermal expansion chamber cylinder 5 and is fixedly connected with the thermal expansion chamber cylinder 5 through the partition plate 11, the lower end of the piston rod 9 penetrates out of the wire outlet plate 10, the outside of the part of the piston rod 9 inserted into the thermal expansion chamber cylinder 5 is sleeved with a flow guide body 3, the end of the flow guide body 3 is provided with an auxiliary nozzle, namely a small nozzle 2 shown in figure 1, the thermal expansion chamber cylinder 5 is internally provided with a thermal expansion chamber 6 above the partition plate 11, a pressure air chamber 8 is formed below the partition plate in the pressure air chamber cylinder 7. The thermal expansion cylinder 5 and the components in the thermal expansion chamber 6 can slide up and down in the air compression chamber cylinder 7 to compress the gas in the space in the air compression chamber 8. The piston rod only needs to drive the thermal expansion cylinder barrel where the thermal expansion chamber is located to move so as to complete work, and the operation work is reduced. However, when the pressure of the expansion chamber of the circuit breaker using the arc extinguishing chamber is low, the gas blowing is insufficient at the moment of arc extinguishing, and the medium recovery after the arc between the fractures is not facilitated.
Disclosure of Invention
The invention aims to provide an arc extinguish chamber, which aims to solve the problems that the gas blowing capacity of an expansion chamber at the last stage of opening a brake is insufficient and a circuit breaker is not easy to open in the prior art; it is also an object of the present invention to provide a circuit breaker that solves the above mentioned problems.
The technical scheme of the arc extinguish chamber is as follows:
the explosion chamber includes main jet and the expansion chamber with main jet intercommunication, be equipped with the gas receiver in the expansion chamber, be equipped with the damping structure of intercommunication gas receiver and expansion chamber on the chamber wall of gas receiver.
For the design of making things convenient for the gas receiver, be equipped with annular baffle in this scheme the expansion chamber, annular baffle set up between movable main contact and main jet and with movable main contact and main jet enclose the gas receiver, the damping structure sets up on annular baffle. The air storage chamber and the expansion chamber are isolated by adding a partition plate in the original expansion chamber, and the design and the processing are convenient.
In order to facilitate processing and save cost, the damping structure is a damping hole in the scheme.
For the design and processing of convenient explosion chamber, in this scheme the gas receiver is equipped with one.
The technical scheme of the circuit breaker is as follows:
the circuit breaker includes the explosion chamber, the explosion chamber include main mouth and with the expansion chamber of main mouth intercommunication, be equipped with the gas receiver in the expansion chamber, be equipped with the damping structure of intercommunication gas receiver and expansion chamber on the chamber wall of gas receiver.
An annular partition plate is arranged in the expansion chamber, the annular partition plate is arranged between the movable main contact and the main nozzle and surrounds the movable main contact and the main nozzle to form the air storage chamber, and the damping structure is arranged on the annular partition plate.
The damping structure is a damping hole.
The air storage chamber is provided with one air storage chamber.
The invention has the beneficial effects that: the expansion chamber is internally provided with an air storage chamber, the wall of the air storage chamber is provided with a damping hole, when the breaker is switched off, the pressure in the expansion chamber starts to rise at the opening initial stage of the arc extinguish chamber, and when the pressure in the expansion chamber is greater than the pressure in the air storage chamber, the gas in the expansion chamber enters the air storage chamber through the damping hole to release partial pressure; when the separating brake is close to the end, the pressure in the expansion chamber is rapidly reduced, when the pressure in the expansion chamber is smaller than the pressure in the air storage chamber, the air in the air storage chamber enters the expansion chamber through the damping hole, the certain air blowing capacity is still ensured at the last stage of the separating brake, the on-off of the circuit breaker is ensured, and the problems that the air blowing capacity of the expansion chamber at the last stage of the separating brake is insufficient and the circuit breaker is not favorable for the on-off of the circuit breaker in the prior art.
Drawings
FIG. 1 is a schematic diagram of a prior art arc chute;
fig. 2 is a schematic view of the arc extinguishing chamber before the separation of the arcing contacts in the specific embodiment of the circuit breaker according to the invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic view of the structure of the arc extinguishing chamber with the arcing contacts separated in the embodiment of the circuit breaker of the present invention;
FIG. 5 is a partial enlarged view of the portion B in FIG. 4;
fig. 6 is a schematic structural view of an arc extinguishing chamber when an arc is extinguished in an embodiment of a circuit breaker according to the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 6 at C;
in fig. 1: 1-nozzle, 2-small nozzle, 3-flow guide body, 5-thermal expansion chamber cylinder, 6-thermal expansion chamber, 7-air compression chamber cylinder, 8-air compression chamber, 9-piston rod, 10-outlet plate, 11-partition plate, 12-check valve and 13-sealing ring;
in fig. 2 to 7: 100-expansion chamber, 101-pneumatic chamber, 102-pull rod, 103-moving arc contact, 104-moving main contact, 105-static main contact, 106-static arc contact, 107-check valve, 108-through hole, 109-damping hole, 110-air storage chamber, 112-annular partition plate, 113-main nozzle, 114-auxiliary nozzle, 115-pneumatic chamber cylinder and 116-baffle.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 2 to 7, the circuit breaker according to the present invention includes an arc-extinguishing chamber including a main nozzle 113 and an expansion chamber 100 communicated with the main nozzle 113, and an air storage chamber 110 is disposed in the expansion chamber 100. The arc chute also includes a plenum 101, and an expansion chamber cylinder is slidably mounted within plenum cylinder 115. And a damping structure for communicating the air storage chamber 110 with the expansion chamber 100 is arranged on the wall of the air storage chamber 110. When the circuit breaker is switched off, the pressure in the expansion chamber 100 at the initial stage of opening the arc extinguish chamber begins to rise, and when the pressure in the expansion chamber 100 is greater than the pressure in the gas storage chamber 110, the gas in the expansion chamber 100 enters the gas storage chamber 110 through the damping structure to release partial pressure; when the opening is close to the end, the pressure in the expansion chamber 100 is rapidly reduced, when the pressure in the expansion chamber 100 is smaller than the pressure in the air storage chamber 110, the gas in the air storage chamber 110 enters the expansion chamber 100 through a damping structure, a main nozzle 113 and an auxiliary nozzle 114 at the last stage of opening are ensured to have certain blowing capacity, the opening and the closing of the circuit breaker are ensured, and the problems that the blowing capacity of the expansion chamber at the last stage of opening is insufficient and the circuit breaker is not favorable to opening and closing in the prior art are solved.
In order to facilitate the processing of the damping structure and save the cost, the damping structure in this embodiment is a damping hole 109. In order to facilitate the design and processing of the arc extinguishing chamber, one air storage chamber 110 is provided in the present embodiment. An annular partition plate 112 is arranged in the expansion chamber 100, the annular partition plate 112 is arranged between the movable main contact 104 and the main nozzle 113, the movable main contact 104 and the main nozzle 113 enclose an air storage chamber 110, and the damping hole 109 is arranged on the annular partition plate 112. The design and processing are convenient by adding an annular partition 112 in the original expansion chamber 100 to separate the air storage chamber 110 and the expansion chamber 100. In other embodiments, the damping structure may also be a damping valve; more than two air storage chambers can be arranged; the air storage chamber can also be enclosed by a plurality of partition plates; the air storage chamber can also be enclosed by a clapboard and a movable main contact; the air storage chamber can also be enclosed by a clapboard and a main nozzle.
The arc extinguishing process of the arc extinguishing chamber comprises the following steps: as shown in fig. 2 and 3, when the arc extinguish chamber is in the initial stage of opening, the moving arc contact 103 and the moving main contact 104 slide into the air compression chamber 101 under the driving of the pull rod 102. Since the baffle 116 of the plenum 101 is fixed relative to the plenum cylinder 115, the plenum 101 is compressed during movement of the moving arcing contacts 103, the gas pressure in the plenum 101 rises, the gas flow in the plenum 101 flows through the through holes 108 into the expansion chamber 100 in the direction shown in fig. 2, and the pressure in the expansion chamber 100 begins to rise. The check valve 107 slides and closes the through hole 108 under the high pressure in the expansion chamber 100. As shown in fig. 4 and 5, as the opening process continues, the static main contact 105 and the dynamic main contact 104, and the static arc contact 106 and the dynamic arc contact 103 are sequentially separated, the expansion chamber 100 is communicated with the gas storage chamber 110 through the damping hole 109, gas in the expansion chamber 100 flows to the gas storage chamber 110 through the damping hole 109, the expansion chamber 100 increases in volume and reduces in pressure, and the problems that shock waves are easily formed in the nozzle at the arc extinguishing time due to overhigh internal pressure, and the gas blowing speed in the region behind the shock waves is low, so that the opening is not facilitated are solved. As shown in fig. 6 and 7, when the opening is nearly finished, the gas pressure in the expansion chamber 100 is rapidly reduced, and at this time, the high-pressure gas in the gas storage chamber 110 is discharged into the expansion chamber 100 through the damping hole 109, so that a certain blowing capacity is ensured at the end of opening, and the establishment of medium recovery after arc is facilitated.
To ensure high pressure SF6The breaking performance of the breaker under heavy current will expand in the breaking processThe highest pressure built in the chamber is maintained within a certain range, and the air blowing at the tail end of the opening gate is increased, so that the breaking performance of the long-burning arc and the medium recovery strength after the arc are improved. Meanwhile, the breaking performance of the circuit breaker under low current is ensured, and relatively high pressure can be built in the expansion chamber in the breaking process.
The circuit breaker can improve the breaking performance of the existing self-energy arc extinguish chamber with the voltage class of 252kV and below, and provides a technical basis for popularization and application of the self-energy arc extinguish chamber to the circuit breakers with the high voltage classes of 420 kV, 550 kV, 800 kV and 1100 kV. The on-off reliability of the self-energy arc extinguish chamber is improved, and the self-energy arc extinguish chamber is popularized and applied to high-voltage-level circuit breakers, so that the research and development cost can be reduced, the product quality is improved, and the economic benefit and the social benefit of a company are greatly improved.
In the specific embodiment of the arc extinguish chamber of the present invention, the arc extinguish chamber in the embodiment has the same structure as that described in the specific embodiment of the circuit breaker, and details are not repeated.
Claims (8)
1. The arc extinguish chamber comprises a main nozzle and an expansion chamber communicated with the main nozzle, and is characterized in that an air storage chamber is arranged in the expansion chamber, and a damping structure communicated with the air storage chamber and the expansion chamber is arranged on the wall of the air storage chamber.
2. The arc extinguish chamber according to claim 1, wherein an annular partition plate is arranged in the expansion chamber, the annular partition plate is arranged between the movable main contact and the main nozzle and forms the air storage chamber with the movable main contact and the main nozzle in a surrounding mode, and the damping structure is arranged on the annular partition plate.
3. Arc chute according to claim 1 or 2, characterized in that the damping structure is a damping orifice.
4. Arc chute according to claim 1 or 2, characterized in that one air reservoir is provided.
5. The circuit breaker comprises an arc extinguish chamber, the arc extinguish chamber comprises a main nozzle and an expansion chamber communicated with the main nozzle, and is characterized in that a gas storage chamber is arranged in the expansion chamber, and a damping structure communicated with the gas storage chamber and the expansion chamber is arranged on the wall of the gas storage chamber.
6. The circuit breaker as claimed in claim 5, wherein an annular partition is provided in the expansion chamber, the annular partition is disposed between the movable main contact and the main nozzle and encloses the air storage chamber with the movable main contact and the main nozzle, and the damping structure is disposed on the annular partition.
7. The circuit breaker according to claim 5 or 6, wherein the damping structure is a damping orifice.
8. The circuit breaker according to claim 5 or 6, characterized in that there is one of said reservoirs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929457.9A CN110838420A (en) | 2018-08-15 | 2018-08-15 | Circuit breaker and arc extinguish chamber thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929457.9A CN110838420A (en) | 2018-08-15 | 2018-08-15 | Circuit breaker and arc extinguish chamber thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110838420A true CN110838420A (en) | 2020-02-25 |
Family
ID=69573202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810929457.9A Pending CN110838420A (en) | 2018-08-15 | 2018-08-15 | Circuit breaker and arc extinguish chamber thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110838420A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725024A (en) * | 2020-06-29 | 2020-09-29 | 西安西电开关电气有限公司 | High-voltage circuit breaker and arc extinguish chamber thereof |
| CN111799128A (en) * | 2020-07-17 | 2020-10-20 | 西安西电开关电气有限公司 | Air cylinder system and high-capacity switch equipment thereof |
| CN112002605A (en) * | 2020-08-25 | 2020-11-27 | 西安西电开关电气有限公司 | Switch device and arc extinguish chamber thereof |
| CN112908771A (en) * | 2020-11-26 | 2021-06-04 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
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| EP0676783A2 (en) * | 1994-04-06 | 1995-10-11 | Siemens Aktiengesellschaft | High-tension circuit-breaker with a heating chamber and a compression chamber |
| CN1379424A (en) * | 2002-05-15 | 2002-11-13 | 宁波天安（集团）股份有限公司 | Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker |
| CN101416263A (en) * | 2006-04-05 | 2009-04-22 | Abb研究有限公司 | Arc chamber of a high-voltage switch with a heating volume of variable size |
| CN201315287Y (en) * | 2008-11-19 | 2009-09-23 | 平高集团有限公司 | Arc extinguish chamber of double-chamber thermal expanding self-extinguishing type SF6 circuit breaker and an air cylinder thereof |
| CN202102959U (en) * | 2011-06-01 | 2012-01-04 | 厦门华电开关有限公司 | Circuit breaker arc-extinguishing chamber |
| CN101582346B (en) * | 2008-05-16 | 2012-09-26 | 日本Ae帕瓦株式会社 | Insulator type gas circuit-breaker |
| CN106206155A (en) * | 2012-09-28 | 2016-12-07 | 株式会社东芝 | Gas-break switch |
| CN106663564A (en) * | 2014-09-25 | 2017-05-10 | 现代重工业株式会社 | Gas insulated circuit breaker |
| JP2017135000A (en) * | 2016-01-28 | 2017-08-03 | 株式会社日立製作所 | Gas circuit breaker |
| CN107706044A (en) * | 2017-10-26 | 2018-02-16 | 平高集团有限公司 | A kind of moving contact component and arc-extinguishing chamber of circuit breaker, breaker |
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2018
- 2018-08-15 CN CN201810929457.9A patent/CN110838420A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0676783A2 (en) * | 1994-04-06 | 1995-10-11 | Siemens Aktiengesellschaft | High-tension circuit-breaker with a heating chamber and a compression chamber |
| CN1379424A (en) * | 2002-05-15 | 2002-11-13 | 宁波天安（集团）股份有限公司 | Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker |
| CN101416263A (en) * | 2006-04-05 | 2009-04-22 | Abb研究有限公司 | Arc chamber of a high-voltage switch with a heating volume of variable size |
| CN101582346B (en) * | 2008-05-16 | 2012-09-26 | 日本Ae帕瓦株式会社 | Insulator type gas circuit-breaker |
| CN201315287Y (en) * | 2008-11-19 | 2009-09-23 | 平高集团有限公司 | Arc extinguish chamber of double-chamber thermal expanding self-extinguishing type SF6 circuit breaker and an air cylinder thereof |
| CN202102959U (en) * | 2011-06-01 | 2012-01-04 | 厦门华电开关有限公司 | Circuit breaker arc-extinguishing chamber |
| CN106206155A (en) * | 2012-09-28 | 2016-12-07 | 株式会社东芝 | Gas-break switch |
| CN106663564A (en) * | 2014-09-25 | 2017-05-10 | 现代重工业株式会社 | Gas insulated circuit breaker |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725024A (en) * | 2020-06-29 | 2020-09-29 | 西安西电开关电气有限公司 | High-voltage circuit breaker and arc extinguish chamber thereof |
| CN111799128A (en) * | 2020-07-17 | 2020-10-20 | 西安西电开关电气有限公司 | Air cylinder system and high-capacity switch equipment thereof |
| CN111799128B (en) * | 2020-07-17 | 2022-07-29 | 西安西电开关电气有限公司 | Air cylinder system and high-capacity switch equipment thereof |
| CN112002605A (en) * | 2020-08-25 | 2020-11-27 | 西安西电开关电气有限公司 | Switch device and arc extinguish chamber thereof |
| CN112002605B (en) * | 2020-08-25 | 2022-08-12 | 西安西电开关电气有限公司 | Switch device and arc extinguish chamber thereof |
| CN112908771A (en) * | 2020-11-26 | 2021-06-04 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
| CN112908771B (en) * | 2020-11-26 | 2023-02-17 | 平高集团有限公司 | Circuit breaker and arc extinguish chamber thereof |
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Application publication date: 20200225 |
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| RJ01 | Rejection of invention patent application after publication |