CN219246589U - High-voltage vacuum circuit breaker - Google Patents
High-voltage vacuum circuit breaker Download PDFInfo
- Publication number
- CN219246589U CN219246589U CN202320264730.7U CN202320264730U CN219246589U CN 219246589 U CN219246589 U CN 219246589U CN 202320264730 U CN202320264730 U CN 202320264730U CN 219246589 U CN219246589 U CN 219246589U
- Authority
- CN
- China
- Prior art keywords
- arc
- moving contact
- lever
- extinguishing
- contact
- 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.)
- Active
Links
Images
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a high-voltage vacuum circuit breaker, which comprises a vacuum arc-extinguishing chamber, wherein the vacuum arc-extinguishing chamber comprises an airtight insulating shell, a moving contact, a fixed contact and a shielding cover, one side of the end face of the moving contact is provided with a lever, the middle part of the lever is rotationally connected with the moving contact, the inner end of the lever is fixedly provided with an arc-extinguishing baffle plate, the arc-extinguishing baffle plate is used for shielding the end face of the moving contact, a reset spring is arranged between the lever and the moving contact, the outer end of the lever is provided with a roller, and the inner wall of the shielding cover is correspondingly provided with a guide rail in rolling fit with the roller. The lever rotates to close the arc-extinguishing baffle inwards in the process of separating the fixed contact from the moving contact, so that the arc is blocked, the arc-extinguishing time is shortened, and the service life and the arc-extinguishing grade of the high-vacuum arc-extinguishing chamber are improved; in the closing process of the fixed contact and the moving contact, the lever rotates under the action of the guide rail and the roller to open the arc extinguishing baffle outwards.
Description
Technical Field
The utility model relates to a circuit breaker, in particular to a high-voltage vacuum circuit breaker.
Background
A vacuum circuit breaker is a power switching device widely used in power transmission and transformation projects, and is dominant in high-voltage and ultra-high-voltage distribution networks. The main shielding cover of the current vacuum arc-extinguishing chamber is fixedly welded on the insulating shell, and the axial movement of the moving contact and the fixed contact perform switching-on and switching-off operation. During the switching-off and switching-on movement of the contacts of the vacuum arc-extinguishing chamber, an electric arc can be generated between the moving contact and the fixed contact, and the longer the duration of the electric arc is, the more metal vapor and liquid drops are splashed and the more heat is generated, so that the service life of the vacuum arc-extinguishing chamber is shortened.
Disclosure of Invention
The utility model aims to solve the problems in the prior art, and provides a high-voltage vacuum circuit breaker which shortens the arc extinguishing time in the switching-off process and improves the arc extinguishing efficiency, thereby prolonging the service life of a vacuum arc extinguishing chamber and improving the arc extinguishing grade.
The utility model solves the technical problems by adopting the technical scheme that: the utility model provides a high-voltage vacuum circuit breaker, includes vacuum interrupter, vacuum interrupter includes airtight insulating housing, moving contact, fixed contact and shield cover, airtight insulating housing's upper portion fixed mounting fixed contact, airtight insulating housing's lower part slidable mounting moving contact, fixed mounting shield cover on airtight insulating housing's the middle part inner wall, the shield cover encircles the inner of fixed contact and moving contact, terminal surface one side of moving contact is equipped with a lever, and the lever middle part is connected with the moving contact rotation, the inner fixed mounting of lever has the arc-extinguishing baffle, and the arc-extinguishing baffle is used for sheltering from the terminal surface of moving contact, be equipped with reset spring between lever and the moving contact, reset spring is used for driving the lever rotation at the in-process that fixed contact and moving contact break brake inwards closes the arc-extinguishing baffle, the outer end of lever is equipped with the roller, corresponds on the inner wall of shield cover to be provided with the roller rolling fit's guide rail, and the guide rail is used for driving the lever rotation at the in-process that fixed contact and moving contact combined floodgate outwards opens the arc-extinguishing baffle.
Further perfecting, one side of the arc-extinguishing baffle is provided with a limit cushion block, and the limit cushion block contacts with the end face of the moving contact when the arc-extinguishing baffle is closed.
The beneficial effects of the utility model are as follows: the lever and the arc-extinguishing baffle are arranged on the moving contact, the lever rotates to inwards close the arc-extinguishing baffle in the process of separating the fixed contact from the moving contact, the arc is blocked, the arc-extinguishing time is shortened, and the service life and the arc-extinguishing grade of the high-vacuum arc-extinguishing chamber are improved; the lever rotates under the action of the guide rail and the roller to open the arc extinguishing baffle outwards in the closing process of the fixed contact and the moving contact, so that the distance of an arc generated when the fixed contact and the moving contact are closed is shortened, the amount of metal vapor and liquid drop splashing generated by the arc is reduced when the fixed contact and the moving contact are closed, and the electric erosion degree of the closing arc to the fixed contact and the moving contact is reduced.
Drawings
FIG. 1 is a schematic diagram of a split-gate structure according to the present utility model;
FIG. 2 is a schematic diagram of a closing state structure according to the present utility model;
reference numerals illustrate: 1. the device comprises an airtight insulating shell, 2, a moving contact, 3, a fixed contact, 4, a shielding case, 5, a lever, 6, an arc extinguishing baffle, 7, a reset spring, 8, a guide rail, 9, a limit cushion block, 10 and a roller.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
referring to fig. 1-2: the embodiment is characterized in that the high-voltage vacuum circuit breaker comprises a vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber comprises an airtight insulating shell 1, a moving contact 2, a fixed contact 3 and a shielding cover 4, the fixed contact 3 is fixedly arranged on the upper portion of the airtight insulating shell 1, the moving contact 2 is slidably arranged on the lower portion of the airtight insulating shell 1, the shielding cover 4 is fixedly arranged on the inner wall of the middle portion of the airtight insulating shell 1, the shielding cover 4 surrounds the inner ends of the fixed contact 3 and the moving contact 2, one side of the end face of the moving contact 2 is provided with a lever 5, the middle portion of the lever 5 is rotationally connected with the moving contact 2, an arc-extinguishing baffle 6 is fixedly arranged at the inner end of the lever 5, the arc-extinguishing baffle 6 is used for shielding the end face of the moving contact 2, a reset spring 7 is arranged between the lever 5 and the moving contact 2, the reset spring 7 is used for driving the lever 5 to rotate to inwards close the arc-extinguishing baffle 6 in the process of opening the fixed contact 3 and the moving contact 2, a roller 10 is correspondingly arranged on the inner wall of the shielding cover 4, and the guide rail 8 is used for driving the lever 6 to rotate to outwards in the process of opening the moving contact 5. The arc chute 6 is composed of a double-layered insulating plate 62.
The structure of a general vacuum circuit breaker mainly comprises three major parts: vacuum interrupter, electromagnetism or spring operating mechanism, support and other parts. The operating mechanism is different according to the type of the breaker, and the operating mechanism adopted is different. The common operating mechanisms include a spring operating mechanism, a CD10 electromagnetic operating mechanism, a CD17 electromagnetic operating mechanism, a CT19 spring energy storage operating mechanism and a CT8 spring energy storage operating mechanism. When the moving contact 2 is driven to move downwards to switch off by the electromagnetic or spring operating mechanism, vacuum electric arcs and arc products such as metal vapor and liquid drops generated by the contacts are generated between the contacts, the shielding cover 4 blocks the metal vapor and liquid drops generated by the contacts during arc extinction and absorbs most of heat energy generated by the electric arcs at the same time, so that the airtight insulating shell 1 is protected. When the moving contact 2 moves to the bottom, the roller 10 is separated from the guide rail 8, the reset spring 7 pulls the lever 5 to rotate clockwise to close the arc extinguishing baffle 6 inwards, the arc extinguishing baffle is shielded on the end face of the moving contact 2, the insulation strength between the contacts is improved, the electric arc can be rapidly blocked, the duration of the electric arc is effectively shortened, the generated metal vapor and liquid drop splashing and heat are reduced, and the service life of the vacuum arc extinguishing chamber is prolonged. When the electromagnetic or spring operating mechanism drives the moving contact 2 to move upwards to switch on, the roller 10 is in rolling fit with the guide rail 8, the driving lever 5 rotates anticlockwise by 90 degrees to open the arc-extinguishing baffle 6 outwards, the insulation strength between the contacts is gradually weakened in the outwards rotating process of the arc-extinguishing baffle 6, the moving contact 2 and the fixed contact 3 generate an electric arc when the distance is relatively short, then the electric arc is completely switched on, and the electric arc disappears. The distance of electric arcs generated when the fixed contact and the moving contact are switched on is shortened, the amount of metal vapor and liquid drop splashing generated by the electric arcs is reduced during switching on, and the electric erosion degree of the switching on electric arcs to the fixed contact and the moving contact is reduced. Further optimized, one side of the arc-extinguishing baffle 6 is provided with a limit cushion block 9, and the limit cushion block 9 contacts with the end face of the movable contact 2 when the arc-extinguishing baffle 6 is closed. The limit cushion block 9 can heighten the arc-extinguishing baffle 6, so that a space exists between the arc-extinguishing baffle 6 and the end face of the moving contact 2, the arc-extinguishing effect can be improved, and the arc-extinguishing baffle 6 is prevented from being adhered to the moving contact 2.
While the utility model has been shown and described with reference to a preferred embodiment, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the utility model.
Claims (2)
1. The utility model provides a high-voltage vacuum circuit breaker, includes vacuum interrupter, vacuum interrupter includes airtight insulating housing (1), moving contact (2), stationary contact (3) and shield cover (4), the upper portion fixed mounting stationary contact (3) of airtight insulating housing (1), the lower part slidable mounting moving contact (2) of airtight insulating housing (1), fixed mounting shield cover (4) on the middle part inner wall of airtight insulating housing (1), the inner of stationary contact (3) and moving contact (2) is encircleed in shield cover (4), its characterized in that: one side of the end face of the moving contact (2) is provided with a lever (5), the middle part of the lever (5) is rotationally connected with the moving contact (2), the inner end of the lever (5) is fixedly provided with an arc-extinguishing baffle plate (6), the arc-extinguishing baffle plate (6) is used for shielding the end face of the moving contact (2), a reset spring (7) is arranged between the lever (5) and the moving contact (2), the reset spring (7) is used for driving the lever (5) to rotate to open the arc extinguishing baffle (6) inwards in the process of opening the fixed contact (3) and the moving contact (2), the roller (10) is arranged at the outer end of the lever (5), the guide rail (8) in rolling fit with the roller (10) is correspondingly arranged on the inner wall of the shielding cover (4), and the guide rail (8) is used for driving the lever (5) to rotate to open the arc extinguishing baffle (6) outwards in the process of closing the fixed contact (3) and the moving contact (2).
2. A high voltage vacuum circuit breaker according to claim 1, characterized in that: one side of the arc-extinguishing baffle (6) is provided with a limit cushion block (9), and the limit cushion block (9) is contacted with the end face of the moving contact (2) when the arc-extinguishing baffle (6) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320264730.7U CN219246589U (en) | 2023-02-10 | 2023-02-10 | High-voltage vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320264730.7U CN219246589U (en) | 2023-02-10 | 2023-02-10 | High-voltage vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219246589U true CN219246589U (en) | 2023-06-23 |
Family
ID=86838925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320264730.7U Active CN219246589U (en) | 2023-02-10 | 2023-02-10 | High-voltage vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219246589U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116666150A (en) * | 2023-08-02 | 2023-08-29 | 四川宝光电器设备有限公司 | Vacuum circuit breaker and switchgear |
-
2023
- 2023-02-10 CN CN202320264730.7U patent/CN219246589U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116666150A (en) * | 2023-08-02 | 2023-08-29 | 四川宝光电器设备有限公司 | Vacuum circuit breaker and switchgear |
| CN116666150B (en) * | 2023-08-02 | 2023-10-03 | 四川宝光电器设备有限公司 | Vacuum circuit breaker and switchgear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3813506A (en) | Vacuum-type circuit breaker with improved ability to interrupt capacitance currents | |
| US6573815B1 (en) | Circuit breaker | |
| CN219246589U (en) | High-voltage vacuum circuit breaker | |
| CN107359068B (en) | Moulded case circuit breaker with compound arc extinguishing performance | |
| CN111477522B (en) | Arc extinguishing device of circuit breaker | |
| WO2020151464A1 (en) | Vacuum arc extinguishing chamber and vacuum circuit breaker | |
| EP3899998B1 (en) | Switching device for guiding and switching of load currents | |
| KR101231764B1 (en) | Gas insulated switchgear | |
| US3813507A (en) | Synchronous puffer circuit breaker | |
| CN107393780B (en) | Miniature circuit breaker with strong breaking capacity | |
| CN209785830U (en) | Three-phase box type vacuum circuit breaker | |
| CN107393777B (en) | Moulded case circuit breaker with high breaking performance | |
| CN115863103A (en) | Pole-mounted circuit breaker with built-in isolating switch | |
| CN102290278B (en) | Arc striking device for electric switch equipment | |
| CN112071719A (en) | Circuit breaker opening and closing contact mechanism and circuit breaker | |
| CN109755065B (en) | Arc extinguishing mechanism for load switch | |
| CN220290696U (en) | Vacuum interrupter and vacuum circuit breaker of 40.5KV | |
| US3701866A (en) | Disconnecting switch for force-cooled isolated phase bus | |
| CN220651928U (en) | Arc breaking structure of universal circuit breaker | |
| CN220731404U (en) | High-voltage vacuum circuit breaker | |
| CN211376575U (en) | Contact system with arc contact and arc striking angle | |
| CN219350124U (en) | Circuit breaker structure with high breaking capacity | |
| JP7362007B1 (en) | switchgear | |
| CN215644288U (en) | Permanent magnet type indoor high-voltage vacuum circuit breaker | |
| CN116936301A (en) | Vacuum interrupter and vacuum circuit breaker of 40.5KV |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |