CN117894628A - Static support and low-frequency circuit breaker - Google Patents
Static support and low-frequency circuit breaker Download PDFInfo
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- CN117894628A CN117894628A CN202311809064.1A CN202311809064A CN117894628A CN 117894628 A CN117894628 A CN 117894628A CN 202311809064 A CN202311809064 A CN 202311809064A CN 117894628 A CN117894628 A CN 117894628A
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- valve
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- valve seat
- static
- check valve
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- 230000003068 static effect Effects 0.000 title claims abstract description 75
- 238000009423 ventilation Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000008033 biological extinction Effects 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 65
- 230000005484 gravity Effects 0.000 description 6
- 241000276425 Xiphophorus maculatus Species 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000002923 metal particle Substances 0.000 description 4
- 229910018503 SF6 Inorganic materials 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Circuit Breakers (AREA)
Abstract
The invention relates to the technical field of high-voltage switches, in particular to a static support and a low-frequency circuit breaker, which comprises a moving contact and a static contact, wherein the static contact is connected with the static support, the static support comprises a cylindrical main body with a sealed rear end, the front end of the cylindrical main body is provided with a connecting end connected with the static contact, the rear end of the cylindrical main body is provided with a radial through exhaust channel, a check valve is arranged between the connecting end and the exhaust channel in the cylindrical main body so as to prevent high Wen Miehu gas from flowing back when flowing from the connecting end to the exhaust channel through the check valve, and the problem that arc extinction is affected by the back flow of high-temperature high-speed high-pressure gas flow of arc extinction in the circuit breaker in the prior art after the high-speed high-pressure gas flow is blown to the static side from a nozzle is solved.
Description
Technical Field
The invention relates to the technical field of high-voltage switches, in particular to a static support and a low-frequency circuit breaker.
Background
The high-voltage gas circuit breaker is mainly used for closing, bearing and switching on and off short-circuit current, and is critical to the safe operation of ultra-high voltage and ultra-high voltage transmission lines. In the process of switching off the short-circuit current, a thermal breakdown phenomenon happens sometimes in the high-voltage gas circuit breaker, wherein the excessive temperature in an arc-extinguishing chamber is a main reason for reducing the dielectric insulation performance, so that the hot gas with reduced gas density caused by electric arc among the breaks is required to be rapidly discharged in order to avoid the excessive temperature in the arc-extinguishing chamber, and the cooling of the gas at the switching-off position after the arc is continuously enhanced. In order to discharge the hot air flow, a corresponding exhaust channel is arranged at the static end of the circuit breaker so as to discharge the high-temperature and high-pressure air at the fracture along the exhaust channel. However, prior art power systems that differ from the frequency of 50Hz are increasingly entering an exemplary operating phase, e.g., 20Hz, 16.7Hz, etc., with lower frequencies resulting in longer arcing times and greater on-off energy. Meanwhile, in order to reduce occupied space, coordinate with environment and facilitate combination, miniaturization is a development trend of high-voltage switch equipment, the volume of the existing circuit breaker is developing toward miniaturization, and other environment-friendly gases (such as nitrogen and carbon dioxide) are generally adopted to replace sulfur hexafluoride in the prior art because of strong greenhouse effect of sulfur hexafluoride, but the insulating performance of other environment-friendly gases (such as nitrogen and carbon dioxide) is lower than that of sulfur hexafluoride.
The invention patent in China with the application publication number of CN115798984A discloses a circuit breaker and a static end structure thereof, wherein a front cylinder opening and a rear cylinder opening are respectively arranged at the front end and the rear end of the static main contact, the rear cylinder opening faces the static support, a middle beam crossing the rear cylinder opening is arranged at the rear end of the static main contact, a penetrating hole for the static arc contact to penetrate is formed in the middle beam, the middle beam and the inner wall of a cylinder body of the static main contact enclose an air flow hole, the middle beam is of a linear structure, the air flow holes are arc-shaped, two air flow holes are symmetrically arranged at the left side and the right side of the middle beam, and hot air generated by a fracture of the circuit breaker flows into the inner cavity of the static support from the inner cavity of the static main contact through the air flow hole. Although the patent encloses the air flow holes with larger opening area, the flow area is increased, and the smoothness of the static side air flow exhaust channel is improved. However, when the static arc contact is separated from the throat of the nozzle, high-temperature high-speed high-pressure air flow is blown to the static side by the nozzle, part of air is discharged through the air channel on the static support after reaching the tail of the static end, and part of air returns to the space between the static contact and the static contact. When the arcing time is long, the breaking energy is large or the length of the static side exhaust channel of the space is limited to be insufficient, the temperature of the gas returned to the space between the moving contact and the static contact is still high, so that failure current cannot be broken, and the product performance and the safe operation of the power system are affected.
Disclosure of Invention
The invention aims to provide a static support for solving the problem that arc extinction is affected by backflow after high-temperature high-speed high-pressure airflow subjected to arc extinction in the prior art is blown to a static side through a nozzle. The invention also provides a low-frequency circuit breaker, which is used for solving the problem that arc extinction is affected by backflow after arc extinction is generated from a nozzle to a static side in the circuit breaker in the prior art, so that the normal opening and closing of the circuit breaker are affected.
The utility model provides a quiet support, includes the tubular body of rear end shutoff, and the front end of tubular body has the link of connecting the stationary contact, and the rear end has radial through exhaust passage, and the position between link and the exhaust passage is provided with the check valve in the tubular body to avoid high Wen Miehu gas to flow back when passing through the check valve from the link and flowing to the exhaust passage.
Further, the check valve is a spring type check valve.
Further, the spring type check valve comprises a plate-shaped valve seat, the plate-shaped valve seat is fixedly connected to the inner wall of the cylindrical main body, the plate-shaped valve seat is provided with a ventilation valve port, the plate-shaped valve seat is also provided with a valve rod in a sliding insertion manner along the air flow direction, the rear side of the plate-shaped valve seat on the valve rod is provided with a valve cover corresponding to the ventilation valve port, and the front side of the plate-shaped valve seat on the valve rod is sleeved with a pressure spring.
Further, a plurality of valve ports are circumferentially and uniformly distributed on the plate-shaped valve seat, and one valve cover is arranged to cover all the valve ports.
Further, a plurality of valve rods are arranged on the plate-shaped valve seat and are uniformly distributed in the circumferential direction.
The invention improves the prior art, in particular: the high-temperature high-pressure gas enters the static support from the connecting end and moves towards the exhaust passage and is discharged into the circuit breaker, the check valve is automatically opened when the high-temperature high-pressure gas reaches the check valve, the high-temperature high-pressure gas flows to the exhaust passage after the check valve is opened, when the high-temperature high-pressure gas contacts with the tail end of the static support, part of the high-temperature high-pressure gas is discharged, and part of the high-temperature high-pressure gas returns, but due to the check valve, the high-temperature high-pressure gas cannot pass through the check valve and cannot return between the dynamic contact and the static contact, the break of fault current is not affected, and the problem that arc extinction is affected by the backflow after the high-temperature high-speed high-pressure gas flow of arc extinction in the prior art is blown to the static side by the nozzle is solved.
The utility model provides a circuit breaker, includes moving contact and static contact, and the static contact is connected with the static support, and the static support includes the tubular main part of rear end shutoff, and the front end of tubular main part has the link of connecting the static contact, and the rear end has radial through exhaust passage, and the position between link and the exhaust passage is provided with the check valve in the tubular main part to avoid high Wen Miehu gas to flow back when passing through the check valve from the link to the exhaust passage.
Further, the check valve is a spring type check valve.
Further, the spring type check valve comprises a plate-shaped valve seat, the plate-shaped valve seat is fixedly connected to the inner wall of the cylindrical main body, the plate-shaped valve seat is provided with a ventilation valve port, the plate-shaped valve seat is also provided with a valve rod in a sliding insertion manner along the air flow direction, the rear side of the plate-shaped valve seat on the valve rod is provided with a valve cover corresponding to the ventilation valve port, and the front side of the plate-shaped valve seat on the valve rod is sleeved with a pressure spring.
Further, a plurality of valve ports are circumferentially and uniformly distributed on the plate-shaped valve seat, and one valve cover is arranged to cover all the valve ports.
Further, a plurality of valve rods are arranged on the plate-shaped valve seat and are uniformly distributed in the circumferential direction.
The invention improves the existing circuit breaker, in particular: a check valve is arranged in a static support of the circuit breaker, high-temperature and high-pressure gas enters the static support from a connecting end and moves towards an exhaust channel and is discharged into the circuit breaker, the check valve is automatically opened when the high-temperature and high-pressure gas reaches the check valve, the high-temperature and high-pressure gas flows to the exhaust channel after the check valve is opened, when the high-temperature and high-pressure gas contacts with the tail end of the static support, part of the high-temperature and high-pressure gas is discharged, part of the high-temperature and high-pressure gas returns, but due to the check valve, the high-temperature and high-pressure gas cannot pass through the check valve and cannot return between a dynamic contact and a static contact, the breaking of fault current is not influenced, and the problem that arc extinction is influenced by the return flow after arc extinction is generated by a nozzle in the circuit breaker in the prior art is solved.
And because the check valve needs to be pressed and opened by high-temperature high-pressure gas, the kinetic energy of a part of high-temperature high-pressure gas is consumed, the speed of the high-temperature high-pressure gas is reduced, most of metal particles carried in the high-temperature high-pressure gas are further deposited and left in the static support, the high-temperature high-pressure gas cannot be discharged to the outer side of the static support, the number of the metal particles entering the outer side of the static support and the inner side of the arc extinguishing chamber shell is reduced, the ground insulation failure is avoided as much as possible, and the insulation performance of the circuit breaker is better maintained.
Drawings
Fig. 1 is: the static support and the static contact of the embodiment of the low-frequency circuit breaker are structurally schematic;
fig. 2 is: the valve cover and the valve seat of the embodiment of the low-frequency circuit breaker are matched in a structural schematic diagram;
fig. 3 is: an enlarged view at a in fig. 1.
In the figure: 1. a plate-like valve seat; 2. a valve cover; 3. a valve stem; 4. a pressure spring; 5. a valve port; 6. a connection end; 7. a cylindrical main body; 8. an exhaust passage; 9. an air guide cone; 10. and (5) pressing plates.
Detailed Description
The main conception of the breaker of the invention is as follows:
the utility model provides a circuit breaker, includes the moving contact and the fixed contact of on-current, and the fixed contact is connected with the static support, and the static support includes the tube-shape main part, and the front end of tube-shape main part has the link of connecting the fixed contact, and the rear end has radial through exhaust passage, and the position between link and the exhaust passage is provided with the check valve in the tube-shape main part to avoid high Wen Miehu gas to flow back when passing through the check valve from the link to the exhaust passage.
The high-temperature high-pressure gas enters the static support from the connecting end of the static support and flows to the exhaust channel, the high-temperature high-pressure gas needs to pass through the check valve in the flowing process, and when the high-temperature high-pressure gas passes through the check valve, the high-temperature high-pressure gas is opened and passes through the check valve to flow to the exhaust channel. When the high-temperature high-pressure gas reaches the end of the static support. The high-temperature high-pressure gas contacts with the tail end of the static support, part of the high-temperature high-pressure gas is discharged out of the static support, and part of the high-temperature high-pressure gas returns, but the high-temperature high-pressure gas cannot pass through the check valve and cannot return between the movable contact and the static contact due to the check valve.
According to the invention, the corresponding check valve is arranged, so that normal discharge of high-temperature and high-pressure gas is not affected, and if backflow occurs, the high-temperature and high-pressure gas does not move between the moving contact and the fixed contact, so that breaking of fault current is affected, and the problem that arc extinction is affected by the fact that arc extinction is affected by backflow of high-temperature and high-speed high-pressure gas flow of arc extinction in the circuit breaker in the prior art after the high-temperature and high-speed high-pressure gas flow is blown to the static side from the nozzle is solved.
And because the check valve needs to be pressed and opened by high-temperature high-pressure gas, the kinetic energy of the high-temperature high-pressure gas is partially consumed, so that the speed of the high-temperature high-pressure gas is reduced, most of metal particles carried in the high-temperature high-pressure gas are further deposited and left in the static support, and cannot be discharged to the outer side of the static support along with the high-temperature high-pressure gas, so that the number of the metal particles entering the outer side of the static support and the inner side of the arc extinguishing chamber shell is greatly reduced, the ground insulation failure is avoided as much as possible, and the insulation performance of the circuit breaker is better maintained.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
An embodiment of the low frequency circuit breaker of the present invention is as follows: the present embodiment is described taking a low frequency circuit breaker as an example, and the corresponding structure in the present invention can also be applied to a high frequency circuit breaker.
As shown in fig. 1-3: the utility model provides a low frequency circuit breaker, includes moving contact and stationary contact, and the stationary contact is connected with the static support, and the static support includes tubular body 7, and the front end of tubular body 7 has the link 6 of connecting the stationary contact, and the rear end is shutoff through air guide cone 9. The air guide cone 9 is provided with a corresponding fixing flange, bolt through holes are formed in the flange, threaded holes are formed in the rear end of the cylindrical main body 7, and bolts penetrate through the pressing plate 10 and the flange to be matched with the cylindrical main body 7 to fix the air guide cone 9. The tubular main body 7 near the air guide cone 9 is provided with a radially-through exhaust passage 8, and a check valve is arranged in the tubular main body 7 at a position between the connecting end 6 and the exhaust passage 8 so as to prevent high Wen Miehu air from flowing back from the connecting end 6 to the exhaust passage 8 through the check valve.
Because when the short circuit happens, the breaker automatically opens and closes, if the check valve can not be opened and closed by the self, the check valve is not opened until the high-temperature high-pressure gas reaches the check valve, or the check valve is not closed until the high-temperature high-pressure gas reaches the check valve, and the structure is the same as that in the prior art, so that the check valve has no optimal effect. Therefore, the check valve needs to be of a structure capable of self-opening and closing, for example, a gravity check valve can be adopted: the corresponding valve seat is arranged in the cylindrical main body 7 of the static support, the valve seat is provided with a valve port 5 through which the corresponding gas passes, the upper side of one side of the valve seat away from the connecting end 6 is hinged with a valve cover 2, the valve cover 2 is kept in a state of sealing the valve port 5 on the valve seat under the action of self gravity at ordinary times, and when the high-temperature high-pressure gas moves to the check valve, the high-temperature high-pressure gas pushes the valve cover 2 open and continues to move towards the exhaust channel 8. When the bottom of the valve body is contacted with the air guide cone 9, part of air is discharged, and part of air returns, but the valve cover 2 of the check valve falls back to block the valve port 5 under the action of self gravity, so that high-temperature high-pressure air cannot return to the movable and static contacts to influence the opening of the valve.
However, with the gravity check valve, when the installation posture of the circuit breaker is inaccurate and has a certain inclination angle, the valve cover 2 cannot close the valve port 5 well in a natural state. Therefore, it is preferable that: the check valve is a spring type check valve. For example: a structure similar to that of a gravity check valve is adopted, but a torsion spring is arranged at the hinge position of the valve cover 2 and the valve seat. When the high-temperature high-pressure gas jacks up the valve cover 2, the torsion spring deforms, and after the high-temperature high-pressure gas passes through, the torsion spring returns to the original state, so that the valve cover 2 closes the valve port 5. When the circuit breaker is in an inclined posture, the spring type check valve can still work normally, and the application range of the spring type check valve is larger than that of the gravity type check valve.
Or other configurations of spring-type check valves may be employed, such as: the spring type check valve comprises a plate valve seat 1, the plate valve seat 1 is fixedly connected to the inner wall of a cylindrical main body 7, the plate valve seat 1 is provided with a ventilation valve port 5, the plate valve seat 1 is also provided with a valve rod 3 in a sliding insertion manner along the air flow direction, the rear side of the plate valve seat 1 on the valve rod 3 is provided with a valve cover corresponding to the ventilation valve port 5, the valve rod 3 is provided with a protrusion which is in blocking fit with the valve cover 2 in the direction away from the plate valve seat 1, and the valve rod 3 and the valve cover 2 can be integrally arranged in other embodiments, so long as the valve rod 3 and the valve cover 2 are not separated under the action of high-temperature high-pressure air. The front side of the plate-shaped valve seat 1 on the valve rod 3 is sleeved with a pressure spring 4, the tail end of the valve rod 3 is provided with a pin hole, the valve rod 3 is sleeved with a gasket, a stop pin is inserted into a pin hole, and the pressure spring 4 is limited by the gasket and the valve seat. The high-temperature high-pressure gas drives the valve cover 2 to move in a direction away from the platy valve seat 1, and at the moment, the valve rod 3 moves along with the valve cover 2 to compress the pressure spring 4. The high-temperature high-pressure gas passes through, the pressure spring 4 pulls the valve rod 3 back to the original position, and the valve cover 2 is driven to close the valve port 5 of the valve seat. The valve rod 3, the pressure spring 4 and the platy valve seat 1 are matched, so that the structure is relatively simple, and the installation is convenient.
The valve port 5 may be provided with one valve port, but if only one valve port 5 is provided, the high-temperature high-pressure air flow is still in a state of uneven air flow distribution after passing through the valve port 5. Therefore, it is preferable that: the valve ports 5 are three and circumferentially distributed on the plate valve seat 1, although in other embodiments four or two valve ports 5 may be used. A plurality of valve ports 5 are arranged, so that the high-temperature high-pressure air flow is more uniform and stable after passing through. And three valve ports 5 are adopted, and three valve caps 2 can also be adopted, and one valve port 5 is correspondingly provided with one valve cap 2. However, if three valve caps 2 are used, the manufacturing difficulty and cost are increased to some extent. Therefore, it is preferable that: the valve cover has one and covers all valve ports 5. The adoption of one valve cover to seal all valve ports 5 is relatively simple in structure, and the manufacturing cost and difficulty are relatively low.
All valve ports 5 can be closed by a valve stem 3 in cooperation with a valve cap 2, for example: the center of the platy valve seat 1 is penetrated with a valve rod 3, one end of the valve rod 3 is in stop fit with the valve cover 2, and the other end is penetrated with a pressure spring 4. The high-temperature high-pressure gas drives the valve cover 2 to be far away from the platy valve seat 1, the valve port 5 is opened, and when the high-temperature high-pressure gas passes through, the pressure spring 4 pulls the valve rod 3 back to the original position and closes the valve port 5 through the valve cover 2. However, if a single valve rod 3 is used in combination with the compression spring 4, the requirement for the elastic force provided by the compression spring 4 is high, so that it is preferable: three valve rods 3 are arranged on the plate-shaped valve seat and are uniformly distributed in the circumferential direction. In this embodiment three valve stems 3 are provided, although in other embodiments four valve stems 3 or two or more may be provided. The plurality of valve rods 3 are matched with the pressure springs 4, so that the elastic acting force provided by the single pressure spring 4 is reduced, and the volume of the pressure springs 4 is reduced.
The high-temperature high-pressure gas enters the static support from the connecting end 6 and moves to the check valve, the valve cover 2 is driven to be far away from the platy valve seat 1, the valve rod 3 is driven to move and compress the pressure spring 4, the valve port 5 is opened, and when the high-temperature high-pressure gas passes through, the pressure spring 4 pulls the valve rod 3 back to the original position and closes the valve port 5 through the valve cover 2. After being rectified by the valve port 5, the high-temperature high-pressure gas directly contacts the air guide cone 9, most of the gas is discharged through the exhaust channel 8 on the cylindrical main body 7, and the rest part of the gas cannot move between the movable contact and the static contact because of the check valve to influence the breaking of fault current.
Embodiments of the static mount of the present invention: the specific structure is the same as that of the static support in the embodiment of the low-frequency circuit breaker, and will not be described herein.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a quiet support, includes the tubular main part of rear end shutoff, and the front end of tubular main part has the link of connecting the stationary contact, and the rear end has radial exhaust passage that link up, its characterized in that: a check valve is provided in the tubular body at a location between the connection end and the vent passage to prevent backflow of high Wen Miehu gas from the connection end through the check valve to the vent passage.
2. The static mount of claim 1, wherein: the check valve is a spring type check valve.
3. A static mount according to claim 2, wherein: the spring type check valve comprises a plate-shaped valve seat, the plate-shaped valve seat is fixedly connected to the inner wall of the cylindrical main body, the plate-shaped valve seat is provided with a ventilation valve port, the plate-shaped valve seat is also provided with a valve rod in a sliding insertion manner along the air flow direction, the rear side of the plate-shaped valve seat on the valve rod is provided with a valve cover corresponding to the ventilation valve port, and the front side of the plate-shaped valve seat on the valve rod is sleeved with a pressure spring.
4. A static mount according to claim 3, wherein: the valve ports are distributed on the plate-shaped valve seat in a circumferential manner, and the valve cover is arranged on one valve port and covers all the valve ports.
5. The static mount of claim 4, wherein: the valve rods arranged on the plate-shaped valve seat are a plurality of and uniformly distributed in the circumferential direction.
6. The utility model provides a circuit breaker, includes moving contact and stationary contact, and the stationary contact is connected with the static support, and the static support includes the tubular main part of rear end shutoff, and the front end of tubular main part has the link of connecting the stationary contact, and the rear end has radial exhaust passage who link up, its characterized in that: a check valve is provided in the tubular body at a location between the connection end and the vent passage to prevent backflow of high Wen Miehu gas from the connection end through the check valve to the vent passage.
7. The circuit breaker of claim 6, wherein: the check valve is a spring type check valve.
8. The circuit breaker of claim 7, wherein: the spring type check valve comprises a plate-shaped valve seat, the plate-shaped valve seat is fixedly connected to the inner wall of the cylindrical main body, the plate-shaped valve seat is provided with a ventilation valve port, the plate-shaped valve seat is also provided with a valve rod in a sliding insertion manner along the air flow direction, the rear side of the plate-shaped valve seat on the valve rod is provided with a valve cover corresponding to the ventilation valve port, and the front side of the plate-shaped valve seat on the valve rod is sleeved with a pressure spring.
9. The circuit breaker of claim 8, wherein: the valve ports are distributed on the plate-shaped valve seat in a circumferential manner, and the valve cover is arranged on one valve port and covers all the valve ports.
10. The circuit breaker according to claim 9, characterized in that: the valve rods arranged on the plate-shaped valve seat are a plurality of and uniformly distributed in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809064.1A CN117894628A (en) | 2023-12-26 | 2023-12-26 | Static support and low-frequency circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809064.1A CN117894628A (en) | 2023-12-26 | 2023-12-26 | Static support and low-frequency circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117894628A true CN117894628A (en) | 2024-04-16 |
Family
ID=90642002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311809064.1A Pending CN117894628A (en) | 2023-12-26 | 2023-12-26 | Static support and low-frequency circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117894628A (en) |
-
2023
- 2023-12-26 CN CN202311809064.1A patent/CN117894628A/en active Pending
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