CN112233933A - Environment-friendly gas-insulated circuit breaker - Google Patents
Environment-friendly gas-insulated circuit breaker Download PDFInfo
- Publication number
- CN112233933A CN112233933A CN202011215250.9A CN202011215250A CN112233933A CN 112233933 A CN112233933 A CN 112233933A CN 202011215250 A CN202011215250 A CN 202011215250A CN 112233933 A CN112233933 A CN 112233933A
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- China
- Prior art keywords
- vacuum arc
- circuit breaker
- friendly gas
- environment
- gear
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Classifications
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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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
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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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
-
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses an environment-friendly gas-insulated circuit breaker, which comprises a closed metal box and a vacuum arc-extinguishing device arranged in the closed metal box, wherein a supporting sliding plate is arranged between two opposite wall surfaces of the closed metal box; the vacuum arc extinguishing device comprises a static contact, a shell, a vacuum arc extinguishing chamber and a moving contact connecting rod, wherein the static contact is arranged at the upper end part of the shell, the vacuum arc extinguishing chamber and the moving contact connecting rod are arranged inside the shell, and an environment-friendly insulator is arranged on the outer surface wall of the shell; the lower end face of the supporting sliding plate is connected with a horizontal transmission device, and the moving contact connecting rod is connected with a vertical transmission device. The invention meets the insulation requirement of the circuit breaker under the condition of not using SF6 gas as an external insulation medium, realizes the miniaturization of the circuit breaker, fills the totally-enclosed gas chamber with environment-friendly gas with certain pressure for insulation, has no pollution to the environment, and is safer and more environment-friendly.
Description
Technical Field
The invention relates to the technical field of circuit electrical engineering, in particular to an environment-friendly gas insulation circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, has the function equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, and generally does not need to change parts after breaking fault current. At present, it has been widely used.
In modern society, the power supply can not be separated in the fields of industry, agriculture, transportation, national defense, cultural and educational sanitation, finance, commerce, tourism service, people's life and the like. Distribution of electricity is an extremely important link in the generation, transmission and use of electricity. The traditional full-insulated circuit breaker in the existing market adopts SF6 gas insulation, although SF6 has good insulation and arc extinguishing performance, the circuit breaker is not environment-friendly, and the working SF6 gas can generate toxic gas under the action of electric arcs, so that potential safety hazards are caused. The environment-friendly gas all-insulation vacuum arc-extinguishing chamber adopting vacuum arc-extinguishing is pushed by an electric academy of sciences, but the environment-friendly gas all-insulation vacuum arc-extinguishing chamber in the current market is additionally provided with a disconnecting switch on the basis of the vacuum arc-extinguishing chamber, so that the cost of the product is increased, the height of the product is increased, and the miniaturization can not be realized.
Disclosure of Invention
The invention aims to solve the problems of large volume, high cost, environmental pollution and inconvenient installation and maintenance of the conventional vacuum circuit breaker.
In order to achieve the purpose, the invention adopts the following technical scheme:
an environment-friendly gas-insulated circuit breaker comprises a closed metal box and a vacuum arc-extinguishing device arranged in the closed metal box, wherein environment-friendly gas is filled in the closed metal box, a supporting sliding plate is arranged between two opposite wall surfaces of the closed metal box, and a horizontal sliding groove matched with the supporting sliding plate is arranged on the wall surface of the closed metal box;
the vacuum arc extinguishing device comprises a static contact, a shell, a vacuum arc extinguishing chamber and a moving contact connecting rod, wherein the static contact is arranged at the upper end part of the shell, the vacuum arc extinguishing chamber and the moving contact connecting rod are arranged inside the shell, and an environment-friendly insulator is arranged on the outer surface wall of the shell;
the lower end face of the supporting sliding plate is connected with a horizontal transmission device, and the moving contact connecting rod is connected with a vertical transmission device.
As a further description of the above technical solution:
and limiting blocks are arranged in the motion directions of the horizontal transmission device and the vertical transmission device.
As a further description of the above technical solution:
the vacuum arc extinguishing device is provided with three.
As a further description of the above technical solution:
one or more air inlets are arranged on the peripheral wall of the closed metal box.
As a further description of the above technical solution:
the shell is an insulating, high-strength and high-temperature-resistant porcelain shell.
As a further description of the above technical solution:
the vacuum arc extinguishing device is fixedly connected to the supporting sliding plate, and the moving contact connecting rod penetrates through the supporting sliding plate.
As a further description of the above technical solution:
horizontal transmission includes threaded rod, first rotary rod, first gear and first rack, the threaded rod is connected with first gear engagement, first gear with axle center fixed connection be in on the first rotary rod, first gear with first rack toothing is connected, first rack with terminal surface fixed connection under the support slide.
As a further description of the above technical solution:
the vertical transmission device comprises a second rotary rod, a second gear and a second rack, a horizontal sliding groove matched with the second rotary rod is formed in the wall surface of the closed metal box, the second gear is fixedly connected to the second rotary rod in a coaxial mode, the second gear is connected with the second rack in a meshed mode, and the second rack is fixedly connected with the end portion of the movable contact connecting rod.
As a further description of the above technical solution:
and an insulating plate is fixedly connected to the inner surface wall of the closed metal box, and is made of epoxy resin.
As a further description of the above technical solution:
fixedly connected with base on the outside lower terminal surface of airtight metal case, fixedly connected with fixed block on the horizontal both ends face of base, the base below is provided with the bottom plate, the horizontal both ends face of bottom plate be equipped with fixed block matched with L type spacing groove, the bottom plate up end be equipped with base matched with standing groove, the bottom plate has the fixed plate through bolted connection.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the environment-friendly insulator is arranged on the shell of the vacuum arc-extinguishing device, so that the creepage distance is increased under the condition of a certain volume, the insulation requirement of the circuit breaker is met under the condition that SF6 gas is not used as an external insulation medium, and the miniaturization of the circuit breaker is realized.
2. The invention solves the problems of low-temperature liquefaction and environmental pollution of the prior similar product by using SF6 gas, and simultaneously has the advantages of modular design and high mechanical reliability.
3. According to the invention, the base and the bottom plate are arranged at the bottom of the metal closed box, so that the installation is more convenient, and meanwhile, only the bolt for connecting the fixed block and the bottom plate needs to be detached during maintenance, so that the field maintenance is convenient and the workload is less.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of a vacuum arc extinguishing apparatus according to the present invention;
FIG. 4 is a top view of the base plate structure of the present invention;
fig. 5 is a side view of the bottom plate structure of the present invention.
Illustration of the drawings:
1. sealing the metal box; 2. supporting the sliding plate; 3. static contact; 4. a housing; 5. a vacuum arc-extinguishing chamber; 6. a moving contact connecting rod; 7. an environment-friendly insulator; 8. a horizontal transmission device; 81. a threaded rod; 82. a first rotating rod; 83. a first gear; 84. a first rack; 9. a vertical transmission; 91. a second rotating rod; 92. a second gear; 93. a second rack; 10. an air inlet; 11. an insulating plate; 12. a base; 13. a fixed block; 14. a base plate; 15. and (7) fixing the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-5, an environment-friendly gas-insulated circuit breaker includes a sealed metal case 1 and a vacuum arc-extinguishing device disposed inside the sealed metal case 1, wherein the sealed metal case 1 is filled with an environment-friendly gas instead of a conventional SF6 gas, which is environmentally friendly and free of environmental pollution; a supporting sliding plate 2 is arranged between two opposite wall surfaces of the closed metal box 1, and a horizontal sliding groove matched with the supporting sliding plate 2 is arranged on the wall surface of the closed metal box 1;
the vacuum arc extinguishing device comprises a static contact 3, a shell 4, a vacuum arc extinguish chamber 5 and a moving contact connecting rod 6, wherein the static contact 3 is arranged at the upper end part of the shell 4, the vacuum arc extinguish chamber 5 and the moving contact connecting rod 6 are arranged inside the shell 4, and an environment-friendly insulator 7 is arranged on the outer surface wall of the shell 4, so that the creepage distance is increased under the condition of unchanged volume, and the miniaturization of the circuit breaker is realized;
the lower end face of the supporting sliding plate 2 is connected with a horizontal transmission device 8, the moving contact connecting rod 6 is connected with a vertical transmission device 9, the arrangement of the horizontal transmission device 8 and the vertical transmission device 9 realizes grounding, closing and breaking of the circuit breaker, and meanwhile, the whole circuit breaker has the characteristics of modular design and high mechanical reliability and is convenient for field installation and maintenance;
limiting blocks are arranged in the motion directions of the horizontal transmission device 8 and the vertical transmission device 9, so that the vacuum arc-extinguishing device and the moving contact connecting rod 6 move in a proper interval;
three vacuum arc extinguishing devices are arranged;
one or more air inlets 10 are arranged on the peripheral wall of the closed metal box 1, so that sufficient environment-friendly gas is ensured in the closed metal box 1;
the shell 4 is an insulating, high-strength and high-temperature-resistant porcelain shell, so that the insulativity and the sealability of the vacuum arc-extinguishing device are realized, and the safety performance is high;
the vacuum arc extinguishing device is fixedly connected to the support sliding plate 2, and the moving contact connecting rod 6 penetrates through the support sliding plate 2;
the horizontal transmission device 8 comprises a threaded rod 81, a first rotating rod 82, a first gear 83 and a first rack 84, the threaded rod 81 is meshed with the first gear 83, the first gear 83 is coaxially and fixedly connected to the first rotating rod 82, the first gear 83 is meshed with the first rack 84, and the first rack 84 is fixedly connected with the lower end face of the support sliding plate 2;
the vertical transmission device 9 comprises a second rotating rod 91, a second gear 92 and a second rack 93, a horizontal chute matched with the second rotating rod 91 is arranged on the wall surface of the closed metal box 1, the second gear 92 is fixedly connected to the second rotating rod 91 coaxially, the second gear 92 is meshed with the second rack 93, and the second rack 93 is fixedly connected with the end part of the movable contact connecting rod 6;
the insulating plate 11 is fixedly connected to the inner surface wall of the closed metal box 1, the insulating plate 11 is made of epoxy resin, and the vacuum arc-extinguishing device can be protected through the insulating plate 11 made of epoxy resin, so that the problem that a mold is additionally arranged outside the vacuum arc-extinguishing device for insulation is solved, and the production cost is saved;
fixedly connected with base 12 on the terminal surface under airtight metal box 1 outside, fixedly connected with fixed block 13 on the horizontal both ends face of base 12, base 12 below is provided with bottom plate 14, the horizontal both ends face of bottom plate 14 is equipped with the L type spacing groove with fixed block 13 matched with, bottom plate 14 up end is equipped with the standing groove with base 12 matched with, bottom plate 14 has fixed plate 15 through bolted connection, set up fixed block 13 in the both sides of base 12 of circuit breaker, at the in-process of placing base 12, make fixed block 13 enter into the L type spacing inslot, be provided with fixed plate 15 in the top of bottom plate 14, fixed plate 15 is used for spacing base 12, base 12 has been prevented to drop from bottom plate 14, thereby reach the fixed purpose of base 12. This bottom plate 14 reasonable in design, convenient operation is convenient for clamp the circuit breaker, also conveniently dismantles the circuit breaker simultaneously, makes things convenient for people to maintain, and the people of being convenient for use.
The working principle is as follows: main circuit open state: when the vacuum arc-extinguishing device is at the open circuit position, the vacuum arc-extinguishing chamber 5 can not be switched on by operating the vertical transmission device 9; the main loop is switched on: operating the horizontal transmission device 8 to switch on the vacuum arc-extinguishing device, operating the vertical transmission device 9 to switch on the vacuum arc-extinguishing chamber 5, wherein the vacuum arc-extinguishing device cannot be operated after the switch-on, and the switch-on of the main circuit is finished; the main loop is switched on to switched off: operating the vertical transmission device 9 to open the vacuum arc-extinguishing chamber 5, operating the horizontal transmission device 8 to open the vacuum arc-extinguishing device, and returning the vacuum arc-extinguishing device to the open-circuit position; closing a grounding loop: the horizontal transmission device 8 is operated to close the vacuum arc-extinguishing device to the grounding position, the vertical transmission device 9 can be operated at the moment to close the vacuum arc-extinguishing chamber 5, the vacuum arc-extinguishing device cannot be operated after the vacuum arc-extinguishing device is closed, and the closing of the grounding loop is finished.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. An environment-friendly gas-insulated circuit breaker comprises a closed metal box (1) and a vacuum arc-extinguishing device arranged inside the closed metal box (1), and is characterized in that the closed metal box (1) is filled with environment-friendly gas, a supporting sliding plate (2) is arranged between two opposite wall surfaces of the closed metal box (1), and a horizontal sliding groove matched with the supporting sliding plate (2) is formed in the wall surface of the closed metal box (1);
the vacuum arc extinguishing device comprises a static contact (3), a shell (4), a vacuum arc extinguishing chamber (5) and a moving contact connecting rod (6), wherein the static contact (3) is arranged at the upper end part of the shell (4), the vacuum arc extinguishing chamber (5) and the moving contact connecting rod (6) are arranged inside the shell (4), and an environment-friendly insulator (7) is arranged on the outer surface wall of the shell (4);
the lower end face of the supporting sliding plate (2) is connected with a horizontal transmission device (8), and the moving contact connecting rod (6) is connected with a vertical transmission device (9).
2. An environmentally friendly gas insulated switchgear as claimed in claim 1, characterized in that the horizontal transmission means (8) and the vertical transmission means (9) are provided with limiting blocks in their direction of movement.
3. The environmentally friendly gas insulated switchgear as claimed in claim 1, wherein there are three vacuum arc extinguishing means.
4. An environmentally friendly gas-insulated circuit breaker as claimed in claim 1, characterized in that said closed metal tank (1) is provided with one or more gas inlet holes (10) in its peripheral wall.
5. An environmentally friendly gas-insulated circuit breaker according to claim 1, characterized in that the housing (4) is an insulating, high-strength, high-temperature-resistant porcelain shell.
6. An environmentally friendly gas insulated switchgear as claimed in claim 1, characterized in that said vacuum arc extinguishing device is fixedly connected to said supporting sled (2), and said movable contact link (6) penetrates said supporting sled (2).
7. An environmentally friendly gas-insulated circuit breaker according to claim 1, wherein the horizontal transmission device (8) comprises a threaded rod (81), a first rotating rod (82), a first gear (83) and a first rack (84), the threaded rod (81) is engaged with the first gear (83), the first gear (83) is fixedly connected to the first rotating rod (82) coaxially, the first gear (83) is engaged with the first rack (84), and the first rack (84) is fixedly connected to the lower end face of the support slide (2).
8. The environmentally friendly gas insulated switchgear as claimed in claim 1, wherein the vertical transmission device (9) comprises a second rotary rod (91), a second gear (92) and a second rack (93), a horizontal chute matched with the second rotary rod (91) is provided on the wall surface of the sealed metal box (1), the second gear (92) is fixedly connected to the second rotary rod (91) coaxially, the second gear (92) is connected to the second rotary rod (91) in a meshing manner, the second rack (93) is connected to the second gear (92), and the second rack (93) is fixedly connected to the end of the movable contact connecting rod (6).
9. The environmentally friendly gas-insulated circuit breaker according to claim 1, wherein an insulating plate (11) is fixedly connected to the inner surface wall of the sealed metal case (1), and the insulating plate (11) is made of epoxy resin.
10. The environmentally friendly gas insulated circuit breaker according to claim 1, wherein a base (12) is fixedly connected to the lower end face of the outside of the sealed metal box (1), fixed blocks (13) are fixedly connected to the two horizontal end faces of the base (12), a bottom plate (14) is arranged below the base (12), L-shaped limit grooves matched with the fixed blocks (13) are arranged on the two horizontal end faces of the bottom plate (14), a placement groove matched with the base (12) is arranged on the upper end face of the bottom plate (14), and the bottom plate (14) is connected with a fixed plate (15) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215250.9A CN112233933A (en) | 2020-11-04 | 2020-11-04 | Environment-friendly gas-insulated circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215250.9A CN112233933A (en) | 2020-11-04 | 2020-11-04 | Environment-friendly gas-insulated circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112233933A true CN112233933A (en) | 2021-01-15 |
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ID=74121882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011215250.9A Pending CN112233933A (en) | 2020-11-04 | 2020-11-04 | Environment-friendly gas-insulated circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112233933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116959915A (en) * | 2023-08-22 | 2023-10-27 | 博时达集团有限公司 | High-voltage vacuum circuit breaker with function of detecting air leakage of arc extinguishing chamber |
-
2020
- 2020-11-04 CN CN202011215250.9A patent/CN112233933A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116959915A (en) * | 2023-08-22 | 2023-10-27 | 博时达集团有限公司 | High-voltage vacuum circuit breaker with function of detecting air leakage of arc extinguishing chamber |
| CN116959915B (en) * | 2023-08-22 | 2024-01-30 | 博时达集团有限公司 | High-voltage vacuum circuit breaker with function of detecting air leakage of arc extinguishing chamber |
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Address after: 325000 leshang Pioneer Park, yueqingwan port area, Yueqing City, Wenzhou City, Zhejiang Province Applicant after: Zhejiang Changyou Electric Co.,Ltd. Address before: 325000 leshang Pioneer Park, yueqingwan port area, Yueqing City, Wenzhou City, Zhejiang Province Applicant before: ZHEJIANG CHANGYOU ELECTRIC CO.,LTD. |
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