CN107464708B - High-voltage circuit breaker with gas cooling channel - Google Patents
High-voltage circuit breaker with gas cooling channel Download PDFInfo
- Publication number
- CN107464708B CN107464708B CN201710892609.8A CN201710892609A CN107464708B CN 107464708 B CN107464708 B CN 107464708B CN 201710892609 A CN201710892609 A CN 201710892609A CN 107464708 B CN107464708 B CN 107464708B
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- CN
- China
- Prior art keywords
- supporting seat
- kuppe
- circuit breaker
- voltage circuit
- arc surface
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
- H01H71/0214—Housing or casing lateral walls containing guiding grooves or special mounting facilities
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- 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
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
- H01H2009/526—Cooling of switch parts of the high voltage switches
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- 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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H2033/888—Deflection of hot gasses and arcing products
Landscapes
- Circuit Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a high-voltage circuit breaker with a gas cooling channel, which comprises a shell, a nozzle and a supporting seat, wherein the nozzle and the supporting seat are arranged in the shell, the supporting seat is provided with an exhaust hole, the supporting seat is also provided with a flow guide cover, and the exhaust hole is positioned on the inner side of the flow guide cover. The invention has the advantages of reliable structure, effective prevention of breakdown, good cooling effect of polluted hot gas and the like.
Description
Technical Field
The invention relates to high-voltage power transmission and transformation equipment, in particular to a high-voltage circuit breaker with a gas cooling channel.
Background
In high voltage transmission and transformation systems, high voltage circuit breakers are essential devices of substations, mainly for collecting, distributing and transmitting electrical energy. Two arc contacts of the high-voltage circuit breaker are separated from each other in an off state, if an arc is pulled out from an air chamber filled with arc extinguishing gas, the arc extinguishing gas heated by the arc can pass through a narrow part of a nozzle and then is blown to the arc to extinguish the arc and prevent re-burning, and polluted hot gas after arc extinguishing is discharged from a supporting seat and enters a shell of the high-voltage circuit breaker. In order to ensure the safety in the using process, the shell of the high-voltage short-circuiting device is in a grounding state, namely, the ground potential, all equipment in the shell is in a high-voltage state, namely, the high potential, the factors such as the installation process of a product and the like are considered in the design of the conventional high-voltage circuit breaker, the structural design of a gas channel in the supporting seat is simpler, after the high-voltage circuit breaker is repeatedly switched on and off, the polluted hot gas mixed with metal particles directly acts on the metal shell to cause discharge and breakdown, so that the potential safety hazard is greater, and the next quick switching-on and switching-off can not be carried out.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-voltage circuit breaker with a gas cooling channel, which has a reliable structure and can effectively prevent breakdown.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a high voltage circuit breaker with gas cooling channel, includes the casing and locates spout and the supporting seat in the casing, be equipped with the exhaust hole on the supporting seat, still install the kuppe on the supporting seat, the exhaust hole is located the kuppe is inboard.
As a further improvement of the above technical solution: be equipped with the shoulder hole in the kuppe and the upper end aperture is less than the lower extreme aperture, kuppe upper end cover is located the supporting seat periphery, the exhaust hole is located kuppe lower extreme is inboard, the diameter of kuppe from top to bottom increases gradually, through last intrados and last extrados smooth connection between the outer wall of kuppe upper end tip and the inner wall, the radius of going up the extrados is greater than go up the radius of intrados, through intrados and the smooth connection of extrados down between the outer wall of kuppe lower extreme tip and the inner wall, the radius of extrados is greater than down the radius of intrados.
As a further improvement of the above technical solution: the supporting seat upper end still installs a shielding section of thick bamboo, the exhaust hole is located the supporting seat upper end, the supporting seat lower extreme is sealed, a shielding section of thick bamboo extends to exhaust hole below.
As a further improvement of the above technical solution: lower concave parts are symmetrically arranged on two sides of the lower end of the supporting seat.
As a further improvement of the above technical solution: the lower concave part comprises a first arc surface close to the center of the supporting seat and a second arc surface close to the inner wall of the supporting seat, the first arc surface is smoothly connected with the second arc surface, and the radius of the first arc surface is larger than that of the second arc surface.
As a further improvement of the above technical solution: the lower end of the shielding cylinder is located between 1/3-2/3 of the supporting seat.
As a further improvement of the above technical solution: the nozzle is characterized in that a shielding cover and a contact seat used for installing an arc contact are sequentially connected below the nozzle, the contact seat is connected with the supporting seat, and the contact seat is communicated with the gas circuit of the shielding cylinder.
As a further improvement of the above technical solution: the upper end of the shielding cover is sleeved on the periphery of the nozzle, the end part of the upper end of the shielding cover is downwards rolled, and the lower end of the shielding cover is conical and extends into the contact seat.
As a further improvement of the above technical solution: and a sealing element is arranged between the lower end of the shielding cover and the contact seat.
Compared with the prior art, the invention has the advantages that: the high-voltage circuit breaker with the gas cooling channel is characterized in that the guide cover is arranged on the supporting seat and surrounds the periphery of the exhaust hole, arc extinguishing gas sprayed out of the nozzle becomes polluted hot gas after arc extinguishing is finished, the polluted hot gas enters the supporting seat and is exhausted outwards through the exhaust hole, the flow velocity of the polluted hot gas is rapidly reduced and the flowing direction is changed under the action of the guide cover, the shell cannot be directly impacted, the generation of a high-low potential breakdown channel can be avoided, meanwhile, the flow path of the polluted hot gas is increased to a certain extent by the guide cover, the cooling effect is improved, and the circuit breaker can be rapidly switched on and switched off next time.
Drawings
Fig. 1 is a schematic view of the structure of a high voltage circuit breaker with a gas cooling channel according to the present invention.
The reference numerals in the figures denote: 1. a housing; 2. a spout; 3. a supporting seat; 31. an exhaust hole; 32. a lower recess; 321. a first arc surface; 322. a second arc surface; 4. a pod; 41. a stepped hole; 42. an upper intrados surface; 43. an upper outer arc surface; 44. a lower intrados surface; 45. a lower extrados surface; 5. a shielding cylinder; 6. a shield case; 7. an arcing contact; 8. a contact seat; 9. and a seal.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
As shown in fig. 1, the high voltage circuit breaker with the gas cooling channel of the present embodiment includes a housing 1, and a nozzle 2 and a support base 3 disposed in the housing 1, wherein an exhaust hole 31 is disposed on the support base 3, a dome 4 is further mounted on the support base 3, and the exhaust hole 31 is located inside the dome 4.
The high-voltage circuit breaker with the gas cooling channel is characterized in that the air guide sleeve 4 is arranged on the supporting seat 3, the air guide sleeve 4 surrounds the periphery of the exhaust hole 31, arc extinguishing gas (shown as an arrow in the figure) sprayed out of the nozzle 2 becomes polluted hot gas after completing arc extinguishing, the polluted hot gas enters the supporting seat 3 and is exhausted outwards through the exhaust hole 31, the flow velocity of the polluted hot gas is rapidly reduced and the flow direction of the polluted hot gas is changed under the action of the air guide sleeve 4, then the polluted hot gas flows downwards and enters the shell 1 without directly impacting the shell 1, the high-low potential breakdown channel can be avoided, meanwhile, the flow path of the polluted hot gas is increased to a certain extent by the air guide sleeve 4, the cooling effect is improved, and the next rapid switching-.
As a further preferable technical solution, in this embodiment, a stepped hole 41 is formed in the air guide sleeve 4, and the aperture of the upper end of the air guide sleeve is smaller than that of the lower end of the air guide sleeve, the upper end of the air guide sleeve 4 is sleeved on the periphery of the support base 3 and is fixed by a fastening screw, the exhaust hole 31 is located on the inner side of the lower end of the air guide sleeve 4, the diameter of the air guide sleeve 4 is gradually increased from top to bottom, that is, the air guide sleeve 4 is integrally in a hollow truncated cone shape, the outer wall and the inner wall of the upper end of the air guide sleeve 4 are smoothly connected through an upper inner arc surface 42 and an upper outer arc surface 43, the radius of the upper outer arc surface 43 is larger than that of the upper inner arc surface 42, the outer wall and the inner wall of the lower end of the. Because there is the potential difference between kuppe 4 and the casing 1, and kuppe 4 compares supporting seat 3 and is closer to casing 1, consequently leads to the breakdown more easily, if do not carry out optimal design to newly-increased kuppe 4's structure, leads to electric field distortion very easily, influences the medium field intensity distribution after the disconnection. Through repeated electric field simulation calculation, the air guide sleeve 4 with the structure can meet the requirement, namely the newly-added air guide sleeve 4 in the embodiment can not cause electric field distortion, and the field intensity distribution of the medium after the disconnection can not be influenced.
Furthermore, in this embodiment, the upper end of the supporting seat 3 is further installed with a shielding cylinder 5, the vent hole 31 is disposed at the upper end of the supporting seat 3, the lower end of the supporting seat 3 is closed, and the shielding cylinder 5 extends to the lower part of the vent hole 31. The pollution hot gas after the arc extinguishing flows downwards through the shielding cylinder 5 until the flow direction is changed after the lower end of the impact supporting seat 3 is impacted, then flows upwards and is discharged from the exhaust hole 31 at the upper end, so that the circulation distance of the pollution hot gas can be greatly increased, and a better cooling effect is achieved. Preferably, the upper end of the supporting seat 3 is provided with a step, the upper end of the shielding cylinder 5 is provided with a T-shaped structure and assembled at the step on the supporting seat 3, and the shielding cylinder 5 can be reliably clamped after the contact seat 8 and the supporting seat 3 are connected into a whole through a fastener, so that the structure is simple and reliable.
Furthermore, in the present embodiment, the lower end of the support base 3 is symmetrically provided with the lower concave portions 32 on the left and right sides. Compared with the planar structure, after the hot polluted gas impacts the two lower concave portions 32 which are symmetrically arranged, the hot polluted gas does not directly impact (or flow back) into the shielding cylinder 5, but flows towards the inner wall direction of the supporting seat 3 at the outer side, finally flows upwards along the gap between the supporting seat 3 and the shielding cylinder 5 according to the designed path, and is finally discharged from the exhaust hole 31.
Furthermore, in this embodiment, the lower concave portion 32 includes a first arc surface 321 close to the center of the supporting seat 3 and a second arc surface 322 close to the inner wall of the supporting seat 3, the first arc surface 321 is smoothly connected to the second arc surface 322, and the radius of the first arc surface 321 is greater than the radius of the second arc surface 322. As shown in the drawings, the concave part 32 of the structure is more beneficial to enabling polluted hot gas to roll up towards two sides, preventing the polluted hot gas from hitting back into the shielding cylinder 5 to the maximum extent, and better flowing upwards along the gap between the supporting seat 3 and the shielding cylinder 5 according to the designed path. Specifically, the radius of the first arc surface 321 is 53mm, and the radius of the second arc surface 322 is 40 mm.
Furthermore, as shown by the two dotted lines in the drawings, in the embodiment, the lower end of the shielding cylinder 5 is located between 1/3-2/3 of the supporting seat 3. If the shield tube 5 is too short, the effect of extending the distance for gas flow is very limited, and if the shield tube 5 is too long, the gas easily hits back into the shield tube 5 and cannot be smoothly discharged according to the designed route.
As a further preferred technical scheme, in this embodiment, the shielding case 6 and the contact seat 8 for installing the arc contact 7 are sequentially connected below the nozzle 2, the contact seat 8 is connected with the supporting seat 3, and the contact seat 8 is in gas path conduction with the shielding cylinder 5. Gas sequentially passes through the nozzle 2, the shielding cover 6 and the contact seat 8 to enter the shielding cylinder 5, and then enters the supporting seat 3 from the shielding cylinder 5.
Furthermore, in the present embodiment, the upper end of the shielding cover 6 is sleeved on the periphery of the nozzle 2, and the upper end of the shielding cover 6 is turned downward, and the lower end of the shielding cover 6 is tapered and extends into the contact seat 8. Through repeated electric field simulation calculation, the shielding cover 6 with the structure can not cause electric field distortion, the field intensity distribution of the medium after the disconnection can not be influenced, and the electric field distribution of the fracture of the two arc contacts 7 in the separation process is more uniform.
Furthermore, in the present embodiment, a sealing member 9 is disposed between the lower end of the shielding shell 6 and the contact block 8. The sealing property between the shielding cover 6 and the contact seat 8 is ensured through the sealing piece 9, and the gas is ensured to flow according to the designed path.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (5)
1. The utility model provides a high voltage circuit breaker with gas cooling channel, includes casing (1) and locates spout (2) and supporting seat (3) in casing (1), be equipped with exhaust hole (31) on supporting seat (3), its characterized in that: still install kuppe (4) on supporting seat (3), exhaust hole (31) is located kuppe (4) is inboard, be equipped with shoulder hole (41) in kuppe (4) and the upper end aperture is less than the lower extreme aperture, kuppe (4) upper end cover is located supporting seat (3) periphery, exhaust hole (31) is located kuppe (4) lower extreme inboard, the diameter of kuppe (4) from top to bottom increases gradually, through last intrados (42) and last extrados (43) smooth connection between the outer wall of kuppe (4) upper end tip and the inner wall, the radius of going up extrados (43) is greater than the radius of going up intrados (42), through intrados (44) and outer cambered surface (45) smooth connection down between the outer wall of kuppe (4) lower extreme tip and the inner wall, the radius of outer cambered surface (45) is greater than down the radius of intrados (44), supporting seat (3) upper end still installs shielding section of thick bamboo (5), exhaust hole (31) are located supporting seat (3) upper end, supporting seat (3) lower extreme is sealed, shielding section of thick bamboo (5) extend to exhaust hole (31) below, supporting seat (3) lower extreme bilateral symmetry is provided with concave part (32) down, concave part (32) are including first arc surface (321) that are close to supporting seat (3) center and second arc surface (322) that are close to supporting seat (3) inner wall down, first arc surface (321) with second arc surface (322) smooth connection, the radius of first arc surface (321) is greater than the radius of second arc surface (322).
2. High voltage circuit breaker with a gas cooling channel according to claim 1, characterized in that: the lower end of the shielding cylinder (5) is located between 1/3-2/3 of the supporting seat (3).
3. High voltage circuit breaker with a gas cooling channel according to claim 1, characterized in that: the utility model discloses a nozzle, including spout (2), spout (2) below connect gradually shield cover (6) and contact seat (8) that are used for installing arc contact (7), contact seat (8) with supporting seat (3) link to each other, contact seat (8) with shielding section of thick bamboo (5) gas circuit switches on.
4. High voltage circuit breaker with a gas cooling channel according to claim 3, characterized in that: the upper end of the shielding cover (6) is sleeved on the periphery of the nozzle (2) and the end part of the upper end of the shielding cover is turned downwards, and the lower end of the shielding cover (6) is conical and extends into the contact seat (8).
5. The high voltage circuit breaker with a gas cooling channel of claim 4, characterized in that: and a sealing element (9) is arranged between the lower end of the shielding cover (6) and the contact seat (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710892609.8A CN107464708B (en) | 2017-09-27 | 2017-09-27 | High-voltage circuit breaker with gas cooling channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710892609.8A CN107464708B (en) | 2017-09-27 | 2017-09-27 | High-voltage circuit breaker with gas cooling channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107464708A CN107464708A (en) | 2017-12-12 |
| CN107464708B true CN107464708B (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710892609.8A Active CN107464708B (en) | 2017-09-27 | 2017-09-27 | High-voltage circuit breaker with gas cooling channel |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011067122A1 (en) * | 2009-12-04 | 2011-06-09 | Siemens Aktiengesellschaft | Circuit breaker arrangement |
| CN204102798U (en) * | 2014-08-29 | 2015-01-14 | 国家电网公司 | A kind of SF6 high-voltage breaker explosion chamber with contact shield cover |
| CN106030744A (en) * | 2013-12-23 | 2016-10-12 | Abb 技术有限公司 | Electrical switching device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3275041D1 (en) * | 1981-09-30 | 1987-02-12 | Sprecher Energie Ag | Compressed-gas circuit breaker |
| EP1768150B1 (en) * | 2005-09-26 | 2010-02-17 | ABB Technology AG | High voltage circuit breaker with improved interrupting capacity |
| DE102011083594A1 (en) * | 2011-09-28 | 2013-03-28 | Siemens Aktiengesellschaft | Circuit-breaker interrupter unit |
| DE102013209663A1 (en) * | 2013-05-24 | 2014-11-27 | Siemens Aktiengesellschaft | Switching gas channel and switching device with switching gas channel |
| CN106710960B (en) * | 2016-12-01 | 2019-01-22 | 上海思源高压开关有限公司 | A kind of gas circuit breaker restoring function with reinforced insulation |
| CN207217344U (en) * | 2017-09-27 | 2018-04-10 | 湖南长高电气有限公司 | Primary cut-out with gas cooling passage |
-
2017
- 2017-09-27 CN CN201710892609.8A patent/CN107464708B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011067122A1 (en) * | 2009-12-04 | 2011-06-09 | Siemens Aktiengesellschaft | Circuit breaker arrangement |
| CN106030744A (en) * | 2013-12-23 | 2016-10-12 | Abb 技术有限公司 | Electrical switching device |
| CN204102798U (en) * | 2014-08-29 | 2015-01-14 | 国家电网公司 | A kind of SF6 high-voltage breaker explosion chamber with contact shield cover |
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| Publication number | Publication date |
|---|---|
| CN107464708A (en) | 2017-12-12 |
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