CN110098086B - High-voltage arc extinction device for power grid - Google Patents
High-voltage arc extinction device for power grid Download PDFInfo
- Publication number
- CN110098086B CN110098086B CN201910371880.6A CN201910371880A CN110098086B CN 110098086 B CN110098086 B CN 110098086B CN 201910371880 A CN201910371880 A CN 201910371880A CN 110098086 B CN110098086 B CN 110098086B
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- CN
- China
- Prior art keywords
- grid
- shell
- air
- switch contact
- blowing
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- 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.)
- Expired - Fee Related
Links
- 230000008033 biological extinction Effects 0.000 title claims abstract description 23
- 238000007664 blowing Methods 0.000 claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000011261 inert gas Substances 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 7
- 238000010891 electric arc Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 description 6
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
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
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- 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
- H01H33/88—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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a high-voltage arc extinction device for a power grid, and mainly relates to the field of arc extinction devices. The device comprises a shell, wherein a switch contact is arranged in the shell and comprises a moving contact and a fixed contact, the shell is provided with a blowing device and a grid device, and the device also comprises an inert gas filling and discharging device; the blowing device comprises a dust filtering device, an air channel, an electromagnetic valve and a blowing fan; the grid device comprises a metal grid and a grid driving device. The invention has the beneficial effects that: the novel blowing device is adopted, so that airflow can be blown out at a constant speed, multidirectional staggered airflow can be blown out, the multidirectional staggered airflow can blow the arc to be long and curved in a multidirectional mode, and then arc extinction can be carried out more effectively by matching with the cutting effect of the grid plate device on the arc; and inert gas can be supplemented after one-time arc extinction, and the structure of the grid plate driving device is simpler and is convenient to control.
Description
Technical Field
The invention relates to the field of arc extinction devices, in particular to a high-voltage arc extinction device for a power grid.
Background
The arc extinguishing device is used for interrupting or extinguishing an arc generated when a pair of current-carrying contacts is opened. When the contacts are separated from each other, the current flows in a correspondingly tapering contact zone, so that the temperature in this zone increases gradually. A melting bridge is generated immediately before the contacts are separated, and the melting bridge is finally broken when the current is small; when the current is large, the melting bridge will be evaporated. The current can therefore only continue to flow via an arc which occurs in the form of a conductive plasma column.
In the existing arc extinction device, the air blowing device blows air through the air cylinder, the air cylinder blows air with great defects, air flow with uniform speed cannot be blown out, the arc can only be blown to be long, and the air flow orientation cannot achieve a good arc bending effect. And the use of inert gas in the shell is disposable, and after one-time arc extinction, corresponding inert gas supplement is not needed, and the structure of the grid sheet driving device is too complex and is not practical.
Disclosure of Invention
The invention aims to provide a high-voltage arc extinction device for a power grid, which adopts a novel air blowing device, not only can blow out airflow at a constant speed, but also can blow out multidirectional staggered airflow, the multidirectional staggered airflow can blow the arc to be long and curved in a multidirectional manner, and then the arc extinction can be more effectively carried out by matching with the cutting action of a grid plate device on the arc; and inert gas can be supplemented after one-time arc extinction, and the structure of the grid plate driving device is simpler and is convenient to control.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high-voltage arc extinction device for a power grid comprises a shell, wherein a switch contact is arranged in the shell and comprises a moving contact and a static contact, one end of the shell is provided with an air blowing device used for transversely blowing an electric arc, the other end of the shell is provided with a grid device used for cutting the electric arc, the middle part of the shell is provided with an electromagnetic device used for creating a magnetic field between the moving contact and the static contact, the grid device and the air blowing device are arranged oppositely, the switch contact is positioned between the grid device and the air blowing device, the electromagnetic device is arranged on two sides of the switch contact, and the high-voltage arc extinction device further comprises an inert gas supplement tank and an air release device; the blowing device comprises a dust filtering device, an air channel, an electromagnetic valve and a blowing fan; the dust filtering device is arranged in a dust filtering cavity on the outer side of the shell, the inner side of the dust filtering cavity is communicated with an air channel opening, the electromagnetic valve is arranged at the air channel opening, a fan cavity is arranged at the tail end of the air channel, the blowing fan is arranged in the fan cavity, a plurality of air distributing pipelines are arranged at the tail end of the fan cavity, and guide pipe caps in different directions are arranged at the tail ends of the air distributing pipelines; the grid device comprises a metal grid and a grid driving device, the metal grid corresponds to the position of the switch contact, the metal grid is connected with the grid driving device, the grid driving device can control the reciprocating motion of the metal grid, the grid driving device drives the metal grid to move towards the middle of the switch contact when the switch contact is disconnected, and the grid driving device drives the metal grid to move out of the middle of the switch contact when the switch contact is connected; when the switch contact is switched on, the electromagnetic device is powered off, and when the switch contact is switched off, the electromagnetic device is powered on; the gas blowing device is used for blowing the arc to the grid plate device in each direction, the electromagnetic device is used for bending the arc to the grid plate device in the transverse direction, the grid plate device is used for dividing the arc bent to the grid plate device into a series of short arcs, and the series of short arcs can be blown out under the blowing action of the gas blowing device for a period of time; the inert gas supplementing tank is arranged at the top of the shell and communicated with the inner cavity of the shell through a valve body, the air discharging device is arranged at the outlet of the metal grid piece and comprises an air discharging cylinder, an air discharging hole is formed in the air discharging cylinder, a spring is arranged at the bottom of the air discharging cylinder, and a sealing piston is arranged at the top of the spring.
The casing is including dismantling left side section shell, middle section shell, right side section shell and the stopper seat of connecting, gas blowing device sets up in left side section shell, switch contact, electromagnetic means set up in the middle section shell, gas blowing device sets up in the right side section shell, the stopper seat is used for fixing right side section shell to in the middle section shell.
The left section shell comprises a first shell section and a second shell section which are detachably connected, the air channel is located in the first shell section, and the air distribution pipeline is located in the second shell section.
The dust filtering device comprises a first-stage filter screen, a second-stage filter screen and a third-stage filter screen, and filter holes of the first-stage filter screen, the second-stage filter screen and the third-stage filter screen are gradually reduced.
The grid driving device is a cylinder or an electric servo cylinder.
Compared with the prior art, the invention has the beneficial effects that:
the device adopts the blowing fan as a blowing device, can blow out airflow at a constant speed, is provided with a plurality of air distribution pipelines at the tail end, and is provided with the guide pipe caps in different directions at the tail end, so that multidirectional staggered airflow can be blown out, the multidirectional staggered airflow can blow the arc to be long and curved in multiple directions, and then the arc can be more effectively extinguished by matching with the cutting effect of the grid plate device on the arc; and inert gas can be supplemented through an inert gas supplementing tank after primary arc extinction, and the structure of the grid driving device adopts a cylinder or an electric servo cylinder, so that the grid driving device can be controlled more simply and conveniently.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of an inert gas replenishing tank for replenishing inert gas according to the present invention.
FIG. 3 is a schematic view showing the structure of the inert gas replenishment tank according to the present invention when the inert gas replenishment is not performed.
Reference numerals shown in the drawings:
1. a housing; 2. a switch contact; 3. an electromagnetic device; 4. an inert gas replenishing tank; 5. a dust filtration device; 6. an air duct; 7. an electromagnetic valve; 8. a blowing fan; 9. a dust filtering cavity; 10. a fan cavity; 11. a wind distribution pipeline; 12. a draft tube cap; 13. a metal grid sheet; 14. a gate driving device; 15. an air discharge cylinder; 16. air bleeding holes; 17. a spring; 18. a sealing piston; 19. a left section shell; 20. a middle shell; 21. a right section shell; 22. a plug seat; 23. a first shell segment; 24. a second shell segment; 25. a first-stage filter screen; 26. a second-stage filter screen; 27. and (4) a three-stage filter screen.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The invention relates to a high-voltage arc extinction device for a power grid, which comprises a shell 1, wherein a switch contact 2 is arranged in the shell 1, the switch contact 2 comprises a moving contact and a fixed contact, one end of the shell 1 is provided with an air blowing device for blowing electric arcs transversely, the other end of the shell 1 is provided with a grid device for cutting electric arcs, the middle part of the shell 1 is provided with an electromagnetic device 3 for creating a magnetic field between the moving contact and the fixed contact, the grid device is arranged opposite to the air blowing device, the switch contact 2 is positioned between the grid device and the air blowing device, and the electromagnetic device 3 is arranged at two sides of the switch contact 2.
For the improvement of the technology, the blowing device comprises a dust filtering device 5, an air duct 6, an electromagnetic valve 7 and a blowing fan 8; dirt device 5 sets up in the dirt chamber 9 of straining in the outside of casing 1, dirt device 5 includes one-level filter screen 25, second grade filter screen 26 and tertiary filter screen 27, the filtration pore of one-level filter screen 25, second grade filter screen 26 and tertiary filter screen 27 reduces gradually. Thus, the blown air can be filtered, and impurities are prevented from entering the shell 1.
The inner side of the dust filtering cavity 9 is communicated with an opening of the air duct 6, the electromagnetic valve 7 is arranged at the opening of the air duct 6, a fan cavity 10 is arranged at the tail end of the air duct 6, the blowing fan 8 is arranged in the fan cavity 10, a plurality of air distribution pipelines 11 are arranged at the tail end of the fan cavity 10, and draft tube caps 12 in different directions are arranged at the tail ends of the air distribution pipelines 11; this device adopts blowing fan 8 as gas blowing device, can blow off the air current at the uniform velocity, 8 ends of blowing fan are equipped with many branch wind pipelines 11 moreover, and the end that divides wind pipeline 11 is equipped with the nozzle cap 12 of different orientations, consequently can blow off multidirectional crisscross air current, and multidirectional crisscross air current can be with the multidirectional blowing of electric arc length blowing and bending, then cooperates the cutting action of grid piece device to electric arc, can more effectually extinguish the arc.
The grid device comprises a metal grid 13 and a grid driving device 14, the metal grid 13 corresponds to the switch contact 2 in position, the metal grid 13 is connected with the grid driving device 14, the grid driving device 14 can control the reciprocating motion of the metal grid 13, and the grid driving device 14 is an air cylinder or an electric servo cylinder.
When the switch contact 2 is disconnected, the grid driving device 14 drives the metal grid 13 to move towards the middle of the switch contact 2, and when the switch contact 2 is connected, the grid driving device 14 drives the metal grid 13 to move out of the middle of the switch contact 2; when the switch contact 2 is switched on, the electromagnetic device 3 is powered off, and when the switch contact 2 is switched off, the electromagnetic device 3 is powered on; the gas blowing device is used for blowing the arc to the grid plate device in each direction, the electromagnetic device 3 is used for bending the arc to the grid plate device in the transverse direction, the grid plate device is used for dividing the arc bent to the grid plate device into a series of short arcs, and the series of short arcs can be blown out under the blowing action of the gas blowing device for a period of time; the device also comprises an inert gas supplement 4 filling and air discharging device. The inert gas supplement 4 is arranged at the top of the shell 1 in a filling mode, the inert gas supplement 4 is communicated with the inner cavity of the shell 1 through a valve body, the air release device is arranged at the outlet of the metal grid piece 13 and comprises an air release cylinder 15, an air release hole 16 is formed in the air release cylinder 15, a spring 17 is arranged at the bottom of the air release cylinder 15, and a sealing piston 18 is arranged at the top of the spring 17. The blowing device continuously blows air into the shell 1 to increase the internal air pressure, and the spring 17 is contracted after the internal air pressure is increased until the sealing piston 18 is pushed to the bottom of the air release hole 16 for air release. After the arc extinction is finished, the electromagnetic valve 7 is closed, and the sealing piston 18 is reset under the elastic force of the spring 17, so that the sealing piston 18 is pushed to the top of the air vent 16 to seal the air vent tube 15. Then, the inert gas supplement 4 is used for supplementing the inert gas 4. The structure of the grid driving device 14 adopts an air cylinder or an electric servo cylinder, and the control can be simpler and more convenient.
In order to make the device convenient to detach install, casing 1 is including dismantling left section shell 19, middle section shell 20, right section shell 21 and the stopper seat 22 of connecting, gas blowing device sets up in left section shell 19, switch contact 2, electromagnetic means 3 set up in middle section shell 20, gas blowing device sets up in right section shell 21, stopper seat 22 is used for fixing right section shell 21 to in middle section shell 20. The left section shell 19 comprises a first shell section 23 and a second shell section 24 which are detachably connected, the air duct 6 is located in the first shell section 23, and the air distribution duct 11 is located in the second shell section 24. The first shell section 23 and the second shell section 24 are in threaded connection, the second shell section 24 and the middle shell 20 are in threaded connection, the middle shell 20 and the right shell 21 are spliced, and the plug seat 22 is used for fixing the right shell 21 into the middle shell 20.
Claims (5)
1. The utility model provides a power electric wire netting high pressure arc extinction device, includes casing (1), be equipped with switch contact (2) in casing (1), switch contact (2) include moving contact and static contact, the one end of casing (1) is equipped with the gas blowing device who is used for horizontal blowing electric arc, the other end of casing (1) is equipped with the grid piece device that is used for cutting electric arc, the middle part of casing (1) is equipped with electromagnetic means (3) that are used for creating magnetic field between moving contact and static contact, the grid piece device with gas blowing device sets up relatively, switch contact (2) are located the grid piece device with between the gas blowing device, electromagnetic means (3) are located the both sides of switch contact (2), its characterized in that: also comprises an inert gas replenishing tank (4) and an air bleeder; the blowing device comprises a dust filtering device (5), an air duct (6), an electromagnetic valve (7) and a blowing fan (8); the dust filtering device (5) is arranged in a dust filtering cavity (9) on the outer side of the shell (1), the inner side of the dust filtering cavity (9) is communicated with an opening of the air duct (6), the electromagnetic valve (7) is arranged at the opening of the air duct (6), a fan cavity (10) is arranged at the tail end of the air duct (6), the blowing fan (8) is arranged in the fan cavity (10), a plurality of air distributing pipelines (11) are arranged at the tail end of the fan cavity (10), and guide pipe caps (12) with different directions are arranged at the tail ends of the air distributing pipelines (11); the grid device comprises a metal grid (13) and a grid driving device (14), the metal grid (13) corresponds to the position of the switch contact (2), the metal grid (13) is connected with the grid driving device (14), the grid driving device (14) can control the reciprocating motion of the metal grid (13), the grid driving device (14) drives the metal grid (13) to move towards the middle of the switch contact (2) when the switch contact (2) is disconnected, and the grid driving device (14) drives the metal grid (13) to move out of the middle of the switch contact (2) when the switch contact (2) is connected; when the switch contact (2) is switched on, the electromagnetic device (3) is powered off, and when the switch contact (2) is switched off, the electromagnetic device (3) is powered on; the gas blowing device is used for blowing the arc to the grid device in each direction, the electromagnetic device (3) is used for bending the arc to the grid device in the transverse direction, the grid device is used for dividing the arc bent to the grid device into a series of short arcs, and the series of short arcs can be blown out under the blowing action of the gas blowing device for a period of time; the inert gas replenishing tank (4) is arranged at the top of the shell (1), the inert gas replenishing tank (4) is communicated with the inner cavity of the shell (1) through a valve body, the air discharging device is arranged at the outlet of the metal grid piece (13), the air discharging device comprises an air discharging cylinder (15), an air discharging hole (16) is formed in the air discharging cylinder (15), a spring (17) is arranged at the bottom of the air discharging cylinder (15), and a sealing piston (18) is arranged at the top of the spring (17).
2. A power grid high voltage arc extinction device according to claim 1, wherein: casing (1) is including dismantling left section shell (19), middle section shell (20), right side section shell (21) and the stopper seat (22) of connection, gas blowing device sets up in left side section shell (19), switch contact (2), electromagnetic means (3) set up in middle section shell (20), gas blowing device sets up in right side section shell (21), stopper seat (22) are used for fixing right side section shell (21) to in middle section shell (20).
3. A power grid high voltage arc extinction device according to claim 2, wherein: the left section shell (19) comprises a first shell section (23) and a second shell section (24) which are detachably connected, the air duct (6) is located in the first shell section (23), and the air distribution pipeline (11) is located in the second shell section (24).
4. A power grid high voltage arc extinction device according to claim 1, wherein: dirt device (5) include one-level filter screen (25), second grade filter screen (26) and tertiary filter screen (27), the filtration pore of one-level filter screen (25), second grade filter screen (26) and tertiary filter screen (27) reduces gradually.
5. A power grid high voltage arc extinction device according to claim 1, wherein: the grid driving device (14) is an air cylinder or an electric servo cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371880.6A CN110098086B (en) | 2019-05-06 | 2019-05-06 | High-voltage arc extinction device for power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371880.6A CN110098086B (en) | 2019-05-06 | 2019-05-06 | High-voltage arc extinction device for power grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110098086A CN110098086A (en) | 2019-08-06 |
| CN110098086B true CN110098086B (en) | 2020-10-02 |
Family
ID=67447029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910371880.6A Expired - Fee Related CN110098086B (en) | 2019-05-06 | 2019-05-06 | High-voltage arc extinction device for power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110098086B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000837B (en) * | 2006-01-13 | 2010-06-09 | 河南平高电气股份有限公司 | High voltage circuit breaker |
| DE102008039813A1 (en) * | 2008-08-25 | 2010-03-04 | Siemens Aktiengesellschaft | High voltage circuit breaker with one switching path |
| JP2013218832A (en) * | 2012-04-06 | 2013-10-24 | Hitachi Ltd | Breaker |
| CN104124086B (en) * | 2014-08-18 | 2016-05-25 | 上海耐吉输配电设备有限公司 | A kind of electric arc-control device |
| CN108987152B (en) * | 2018-07-31 | 2020-10-27 | 平高集团威海高压电器有限公司 | Arc extinguish chamber and circuit breaker |
-
2019
- 2019-05-06 CN CN201910371880.6A patent/CN110098086B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN110098086A (en) | 2019-08-06 |
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Granted publication date: 20201002 Termination date: 20210506 |