CN114758921B - Explosion chamber and use circuit breaker of this explosion chamber - Google Patents
Explosion chamber and use circuit breaker of this explosion chamber Download PDFInfo
- Publication number
- CN114758921B CN114758921B CN202111593243.7A CN202111593243A CN114758921B CN 114758921 B CN114758921 B CN 114758921B CN 202111593243 A CN202111593243 A CN 202111593243A CN 114758921 B CN114758921 B CN 114758921B
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- energy storage
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- arc
- chamber
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- 238000004880 explosion Methods 0.000 title description 7
- 238000004146 energy storage Methods 0.000 claims abstract description 183
- 238000003860 storage Methods 0.000 claims abstract description 62
- 230000003068 static effect Effects 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims description 20
- 238000005192 partition Methods 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 description 15
- 238000007906 compression Methods 0.000 description 15
- 239000000306 component Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000010891 electric arc Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000007664 blowing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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
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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
- H01H33/22—Selection of fluids for arc-extinguishing
Landscapes
- Circuit Breakers (AREA)
Abstract
The invention aims to provide an arc-extinguishing chamber and a circuit breaker using the same, so as to solve the technical problem of low operation power utilization rate of the arc-extinguishing chamber in the prior art. The circuit breaker comprises a frame, an arc extinguishing chamber and an operating mechanism, wherein the arc extinguishing chamber comprises a static end component and a movable end component, the static end component comprises a static arc contact and a static end supporting seat, the movable end component comprises a movable end supporting seat and a movable contact, and the movable contact comprises a movable contact rod, a movable arc contact and a pressure cylinder; the air compressing cylinder is internally provided with an air compressing chamber and an expansion chamber, the movable end supporting seat is provided with an air storage cylinder, and the front end opening of the air storage cylinder is communicated with the air compressing chamber; an energy storage spring and an energy storage plate are arranged in the air cylinder, and the movable contact rod is in sliding fit with the energy storage plate; the energy storage plate is slidably assembled in the air storage cylinder, the energy storage plate is used for enclosing an air temporary storage cavity with the air storage cylinder, the air temporary storage cavity is communicated with the air pressing chamber, and the energy storage spring is used for providing forward elasticity for the energy storage plate; the rear end of the air cylinder is provided with an air vent so as to discharge air at the rear side of the energy storage plate when the energy storage plate moves backwards.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a structure of an air chamber in an arc extinguishing chamber.
Background
The most critical element in the high-voltage switch equipment is a high-voltage breaker, the breaker controls the connection and disconnection of a circuit, and the circuit can be cut off by opening the breaker when the circuit is required to be cut off or when the circuit is subjected to local fault maintenance. Circuit breakers are generally classified into gas-filled circuit breakers and vacuum circuit breakers, and the vacuum circuit breakers often employ SF due to high component precision and difficulty in setting required to maintain vacuum therein 6 A gas filled circuit breaker. The core component of the circuit breaker is an arc-extinguishing chamber, and the arc-extinguishing chamber can be divided into a compressed air arc-extinguishing chamber and a self-energy arc-extinguishing chamber according to an arc-extinguishing mechanism.
The pneumatic arc extinguishing chamber is of a single air chamber structure, and the pneumatic cylinder is driven to move through the mechanism to compress SF in the pneumatic chamber 6 Gas, generating high-pressure air blow arc extinction; the moving end assembly of the self-powered arc extinguishing chamber is shown in FIG. 1The movable contact comprises a movable end supporting seat 1 and a movable contact, wherein the movable contact is assembled on the movable end supporting seat 1 in a front-back guiding sliding manner, and the movable contact comprises a movable contact rod 2, a movable arc contact 4 positioned at the front end of the movable contact rod 2 and a pressure cylinder 5 positioned at the periphery of the movable arc contact 4; the inside of the air compressing cylinder 5 is provided with an air compressing chamber 7 and an expansion chamber 8, the air compressing chamber 7 and the expansion chamber 8 are separated by a partition plate 6, the partition plate 6 is provided with an air outlet valve 9, and the movable contact rod 2 penetrates through the partition plate 6. When the breaker breaks large current, the arc extinguishing chamber heats SF by utilizing arc energy 6 The gas generates a high-pressure gas blow-out, and when a small current is turned off, the gas blow-out is generated by the plenum 7. The self-energy arc extinguishing chamber can utilize the arc energy to extinguish the arc, so that the self-energy arc extinguishing chamber has lower operation work and higher mechanical reliability.
In order to reduce the magnitude of the compressive reaction force generated in the plenum during the opening operation of the circuit breaker, as shown in fig. 1, a pressure relief structure 20 is further provided in the plenum of the arc extinguishing chamber, and includes a pressure relief valve 21 and a pressure relief channel 22. When the pressure value in the pressure chamber is larger than the relief pressure, the relief valve 21 is opened to relieve the pressure in the pressure chamber 7. The provision of the pressure relief structure 20 effectively dampens the counter-pressure of the air but wastes the work of operation of the mechanism.
Disclosure of Invention
The invention aims to provide an arc-extinguishing chamber so as to solve the technical problem of low operation power utilization rate of the arc-extinguishing chamber in the prior art. In addition, the invention also aims to provide a circuit breaker using the arc extinguishing chamber so as to solve the problems.
In order to achieve the above purpose, the technical scheme of the arc extinguishing chamber provided by the invention is as follows:
an arc extinguishing chamber comprises a static end assembly and a moving end assembly, wherein the static end assembly comprises a static arc contact and a static end supporting seat, and the moving end assembly comprises a moving end supporting seat and a moving contact; the movable contact is assembled on the movable end supporting seat in a front-back guiding and sliding way, and comprises a movable contact rod, a movable arc contact at the front end of the movable contact rod and a pressure cylinder at the periphery of the movable arc contact; the air compressing cylinder is internally provided with an air compressing chamber and an expansion chamber, the air compressing chamber is separated from the expansion chamber by a partition board, a movable arc contact is positioned at the front side of the partition board, the movable end supporting seat is provided with an air storage cylinder sleeved outside the movable contact rod, and the front end opening of the air storage cylinder is communicated with the air compressing chamber to supply air in the air compressing chamber into the air storage cylinder; an energy storage spring and an energy storage plate are arranged in the air storage cylinder, and the movable contact rod penetrates through the energy storage plate and is in sliding fit with the energy storage plate back and forth; the energy storage plate is slidably assembled in the air storage cylinder, the energy storage plate is used for enclosing with the air storage cylinder to form a gas temporary storage cavity positioned at the front side of the energy storage plate, the gas temporary storage cavity is communicated with the air pressing chamber and used for temporarily storing gas when the gas in the switching-off air pressing chamber of the arc extinguishing chamber is compressed, and the energy storage spring is used for providing forward elasticity for the energy storage plate; the rear end of the air cylinder is provided with an air vent so as to discharge air at the rear side of the energy storage plate when the energy storage plate moves backwards.
The beneficial effects are that: through set up the gas receiver of cover on moving the feeler lever on moving the end supporting seat, the front end opening and the plenum chamber intercommunication of gas receiver to can make the gas of rapid expansion get into the gas temporary storage chamber in the plenum chamber and store when the circuit breaker breaking, the gas in the reasonable utilization plenum chamber has reduced the waste of operating work. The arrangement of the energy storage plate and the energy storage spring enables the gas entering the air storage cylinder to push the energy storage plate to compress the energy storage spring, when the pressure of the gas in the air compression chamber is reduced after the gas is conveyed to the expansion chamber, the energy storage spring can reversely push the energy storage plate to move forward, and then the gas stored in the air storage cylinder is pressed into the air compression chamber, so that the gas entering the air compression chamber can be pushed all the time to have pushing pressure, and the gas is pressed into the expansion chamber to be used for blowing an electric arc in front of the arc contact. Meanwhile, the diameter of the pressure chamber of the arc-extinguishing chamber and the stroke of the arc-extinguishing chamber can be reduced, compared with the arc-extinguishing chamber in the prior art, the increase of the gas quantity of the arc-extinguishing chamber by the gas storage cylinder increases the quantity of gas finally entering the expansion chamber, the pushing of the energy storage spring also enables the gas entering the expansion chamber to keep a certain pressure, and the waste of operation work is reduced while the operation work of the mechanism is reduced. The technical problem of low utilization rate of the operation power of the arc extinguishing chamber in the prior art is effectively solved.
Preferably, the movable end supporting seat comprises a cylindrical seat body and a mounting plate fixed in the cylindrical seat body, the movable contact rod is assembled on the mounting plate in a front-back guiding sliding manner, the rear end of the air storage cylinder is fixed on the mounting plate, the rear end opening of the air storage cylinder forms the air vent, and a mounting plate through hole communicated with the air vent is formed in the mounting plate. The mounting panel is convenient for the gas receiver in moving the installation in the end supporting seat, and the rear end opening of gas receiver forms the gas outlet of gas receiver, and processing is convenient.
Preferably, the rear end of the air cylinder is provided with an air cylinder flange, and the air cylinder is fixed on the mounting plate through the air cylinder flange. The air reservoir flange is arranged to facilitate connection of the air reservoir and the mounting plate, so that the air reservoir is firmly assembled and tightly matched.
Preferably, the rear end of the energy storage spring is propped against the mounting plate. The energy storage spring is convenient to set, and is fast to install and take out.
Preferably, the front end of the air cylinder is provided with an energy storage plate stopping structure for limiting the energy storage plate to be pulled out forwards. Through the cooperation of stopping of energy storage board structure and energy storage board, restrict the energy storage board in the gas receiver, prevent that the energy storage board from deviate from or misplacement after deviating from the gas receiver.
Preferably, the energy storage spring is pre-compressed and installed in the air cylinder. After the pressure in the pressure chamber reaches a certain value, gas can enter the gas temporary storage cavity against the elasticity of the energy storage spring, so that the gas in the gas temporary storage cavity is discharged under higher pressure, and a better blowing effect is generated on an electric arc at the moving arc contact.
Preferably, the energy storage plate blocking structure is a blocking edge arranged at the front end opening of the air cylinder, and the blocking edge is used for being matched with the front and back blocking of the energy storage plate to limit the energy storage plate from falling off. The processing of keeping off the edge is convenient, simple structure, can keep off the energy storage board through keeping off the edge and end, and compact structure nature is high, keeps off and ends effectually.
Preferably, the energy storage spring is sleeved on the periphery of the movable contact rod. The energy storage spring is sleeved on the periphery of the movable contact rod, so that the energy storage spring is prevented from shifting after being compressed and stretched for a long time, and the energy storage plate can stably run in the air cylinder.
Preferably, the separator is provided with an air outlet valve for allowing air to enter the expansion chamber from the air pressure chamber, and the air outlet valve is a one-way valve. The one-way air outlet valve is arranged on the partition plate, so that high-pressure air in the air pressure chamber can be conveyed into the expansion chamber in one way during opening, and then the electric arc at the arc contact is blown forward through the expansion chamber, and the high-pressure air in the expansion valve is prevented from being reversely flushed into the air pressure chamber.
Preferably, the mounting plate is provided with a boss protruding forwards, the movable contact rod penetrates through the boss, and the inner wall of the air cylinder is matched with the peripheral surface of the boss in a positioning mode. Through the setting of boss, the cylinder wall cover of gas receiver is established directly when installing the gas receiver and can be accomplished the location of gas receiver on the boss, makes things convenient for the installation setting of gas receiver.
Preferably, the energy storage plate has an outer cylindrical surface in sliding fit with the inner wall surface of the air cylinder and an inner cylindrical surface in sliding fit with the movable contact rod. Through the outer cylindrical surface and the inner cylindrical surface that set up on the energy storage board to make the energy storage board can overlap on moving the feeler lever and slide simultaneously its periphery can with gas receiver inner wall sliding fit, do benefit to the energy storage board and receive after the gaseous top and slide fast in the gas receiver.
Preferably, a spring mounting boss extending into the energy storage spring is provided on a side of the energy storage plate facing the energy storage spring. The energy storage plate is connected and fastened with the spring through the spring mounting boss on one side of the energy storage plate towards the spring, and the spring mounting boss stretches into the spring for internal fixation during connection, so that the connection is convenient.
The technical scheme of the circuit breaker provided by the invention is as follows:
the circuit breaker comprises a frame, an arc extinguishing chamber and an operating mechanism, wherein the arc extinguishing chamber is arranged on the frame, the operating mechanism is arranged on the frame and comprises a static end assembly and a moving end assembly, the operating mechanism is used for driving the moving end assembly of the arc extinguishing chamber to move, the static end assembly comprises a static arc contact and a static end supporting seat, and the moving end assembly comprises a moving end supporting seat and a moving contact; the movable contact is assembled on the movable end supporting seat in a front-back guiding and sliding way, and comprises a movable contact rod, a movable arc contact at the front end of the movable contact rod and a pressure cylinder at the periphery of the movable arc contact; the air compressing cylinder is internally provided with an air compressing chamber and an expansion chamber, the air compressing chamber is separated from the expansion chamber by a partition board, a movable arc contact is positioned at the front side of the partition board, the movable end supporting seat is provided with an air storage cylinder sleeved outside the movable contact rod, and the front end opening of the air storage cylinder is communicated with the air compressing chamber to supply air in the air compressing chamber into the air storage cylinder; an energy storage spring and an energy storage plate are arranged in the air storage cylinder, and the movable contact rod penetrates through the energy storage plate and is in sliding fit with the energy storage plate back and forth; the energy storage plate is slidably assembled in the air storage cylinder, the energy storage plate is used for enclosing with the air storage cylinder to form a gas temporary storage cavity positioned at the front side of the energy storage plate, the gas temporary storage cavity is communicated with the air pressing chamber and used for temporarily storing gas when the gas in the switching-off air pressing chamber of the arc extinguishing chamber is compressed, and the energy storage spring is used for providing forward elasticity for the energy storage plate; the rear end of the air cylinder is provided with an air vent so as to discharge air at the rear side of the energy storage plate when the energy storage plate moves backwards.
The beneficial effects are that: through set up the gas receiver of cover on moving the feeler lever on moving the end supporting seat, the front end opening and the plenum chamber intercommunication of gas receiver to can make the gas entering gas of sharp inflation in the plenum chamber store in the gas temporary storage chamber when the circuit breaker breaking, the gas in the rational utilization plenum chamber has reduced the waste of operating work. The arrangement of the energy storage plate and the energy storage spring enables the gas entering the air storage cylinder to push the energy storage plate to compress the energy storage spring, when the pressure of the gas in the air compression chamber is reduced after the gas is conveyed to the expansion chamber, the energy storage spring can reversely push the energy storage plate to move forward, and then the gas stored in the air storage cylinder is pressed into the air compression chamber, so that the gas entering the air compression chamber can be pushed all the time to have pushing pressure, and the gas is pressed into the expansion chamber to be used for blowing an electric arc in front of the arc contact. Meanwhile, the diameter of the pressure chamber of the arc-extinguishing chamber and the stroke of the arc-extinguishing chamber can be reduced, compared with the arc-extinguishing chamber in the prior art, the increase of the gas quantity of the arc-extinguishing chamber by the gas storage cylinder increases the quantity of gas finally entering the expansion chamber, the pushing of the energy storage spring also enables the gas entering the expansion chamber to keep a certain pressure, and the waste of operation work is reduced while the operation work of the mechanism is reduced. The technical problem that the operation power utilization rate of the arc extinguish chamber in the circuit breaker in the prior art is low is effectively solved by arranging the arc extinguish chamber of the gas storage cylinder and the component thereof in the circuit breaker.
Preferably, the movable end supporting seat comprises a cylindrical seat body and a mounting plate fixed in the cylindrical seat body, the movable contact rod is assembled on the mounting plate in a front-back guiding sliding manner, the rear end of the air storage cylinder is fixed on the mounting plate, the rear end opening of the air storage cylinder forms the air vent, and a mounting plate through hole communicated with the air vent is formed in the mounting plate. The mounting panel is convenient for the gas receiver in moving the installation in the end supporting seat, and the rear end opening of gas receiver forms the gas outlet of gas receiver, and processing is convenient.
Preferably, the rear end of the air cylinder is provided with an air cylinder flange, and the air cylinder is fixed on the mounting plate through the air cylinder flange. The air reservoir flange is arranged to facilitate connection of the air reservoir and the mounting plate, so that the air reservoir is firmly assembled and tightly matched.
Preferably, the rear end of the energy storage spring is propped against the mounting plate. The energy storage spring is convenient to set, and is fast to install and take out.
Preferably, the front end of the air cylinder is provided with an energy storage plate stopping structure for limiting the energy storage plate to be pulled out forwards. Through the cooperation of stopping of energy storage board structure and energy storage board, restrict the energy storage board in the gas receiver, prevent that the energy storage board from deviate from or misplacement after deviating from the gas receiver.
Preferably, the energy storage spring is pre-compressed and installed in the air cylinder. After the pressure in the pressure chamber reaches a certain value, gas can enter the gas temporary storage cavity against the elasticity of the energy storage spring, so that the gas in the gas temporary storage cavity is discharged under higher pressure, and a better blowing effect is generated on an electric arc at the moving arc contact.
Preferably, the energy storage plate blocking structure is a blocking edge arranged at the front end opening of the air cylinder, and the blocking edge is used for being matched with the front and back blocking of the energy storage plate to limit the energy storage plate from falling off. The processing of keeping off the edge is convenient, simple structure, can keep off the energy storage board through keeping off the edge and end, and compact structure nature is high, keeps off and ends effectually.
Preferably, the energy storage spring is sleeved on the periphery of the movable contact rod. The energy storage spring is sleeved on the periphery of the movable contact rod, so that the energy storage spring is prevented from shifting after being compressed and stretched for a long time, and the energy storage plate can stably run in the air cylinder.
Preferably, the separator is provided with an air outlet valve for allowing air to enter the expansion chamber from the air pressure chamber, and the air outlet valve is a one-way valve. The one-way air outlet valve is arranged on the partition plate, so that high-pressure air in the air pressure chamber can be conveyed into the expansion chamber in one way during opening, and then the electric arc at the arc contact is blown forward through the expansion chamber, and the high-pressure air in the expansion valve is prevented from being reversely flushed into the air pressure chamber.
Preferably, the mounting plate is provided with a boss protruding forwards, the movable contact rod penetrates through the boss, and the inner wall of the air cylinder is matched with the peripheral surface of the boss in a positioning mode. Through the setting of boss, the cylinder wall cover of gas receiver is established directly when installing the gas receiver and can be accomplished the location of gas receiver on the boss, makes things convenient for the installation setting of gas receiver.
Preferably, the energy storage plate has an outer cylindrical surface in sliding fit with the inner wall surface of the air cylinder and an inner cylindrical surface in sliding fit with the movable contact rod. Through the outer cylindrical surface and the inner cylindrical surface that set up on the energy storage board to make the energy storage board can overlap on moving the feeler lever and slide simultaneously its periphery can with gas receiver inner wall sliding fit, do benefit to the energy storage board and receive after the gaseous top and slide fast in the gas receiver.
Preferably, a spring mounting boss extending into the energy storage spring is provided on a side of the energy storage plate facing the energy storage spring. The energy storage plate is connected and fastened with the spring through the spring mounting boss on one side of the energy storage plate towards the spring, and the spring mounting boss stretches into the spring for internal fixation during connection, so that the connection is convenient.
Drawings
Fig. 1 is a state diagram of venting when a plenum chamber of a moving end assembly of an arc chute is compressed (arrows indicate gas flow direction in the plenum chamber) in the background art;
fig. 2 is a state diagram of the backward movement of the energy storage plate (the arrow indicates the direction of the gas in the gas compressing chamber entering the gas storage cylinder) when the gas compressing chamber of the arc extinguishing chamber in the specific embodiment 1 of the circuit breaker provided by the invention.
Reference numerals illustrate:
1. a movable end supporting seat; 2. a movable feeler lever; 3. a mounting plate; 4. a moving arc contact; 5. a pressure cylinder; 6. a partition plate; 7. a plenum chamber; 8. an expansion chamber; 9. an air outlet valve; 10. an air cylinder; 11. an intake valve; 12. an energy storage spring; 13. an energy storage plate; 14. a mounting plate through hole; 15. a boss; 16. a gas cylinder flange; 17. a fixing bolt; 18. a blocking edge; 19. a gasket; 20. a pressure relief structure; 21. a pressure release valve; 22. a pressure relief channel; 23. and a spring mounting boss.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
Specific embodiment 1 of the circuit breaker provided by the invention:
the circuit breaker includes the frame, disposes the explosion chamber in the frame and sets up the operating mechanism in the frame, and the explosion chamber includes quiet end subassembly and moving end subassembly, and operating mechanism is used for driving the moving end subassembly motion of explosion chamber to regulate and control circuit breaker separating brake and closing a floodgate. The movable end component comprises a movable end supporting seat and a movable contact, the fixed end component comprises a fixed end supporting seat and a fixed arc contact, the movable end component and the fixed end component are connected with each other, the movable contact and the fixed arc contact are connected when the operating mechanism is controlled to switch on the circuit breaker, and the movable contact and the fixed arc contact are disconnected when the operating mechanism is controlled to switch off the circuit breaker.
As shown in fig. 2, the movable end support seat 1 is a cylindrical seat body, and a mounting plate 3 is fixed in the seat body. Defining one end of the movable end supporting seat 1 facing the static end assembly as the front end. The movable contact comprises a movable contact rod 2, a movable arc contact 4 is arranged at the front end of the movable contact rod 2, and a pressure cylinder 5 is arranged at the periphery of the movable arc contact 4. The center of the mounting plate 3 is provided with a through hole for the movable contact rod 2 to pass through, and the movable contact rod 2 is guided back and forth through the mounting plate 3 and is slidingly assembled on the mounting plate 3. As shown in fig. 2, the air cylinder 5 is also in a cylindrical structure, a partition plate 6 is arranged in the air cylinder 5, the partition plate 6 divides the air cylinder 5 into an air pressure chamber 7 and an expansion chamber 8, a communication hole is arranged on the partition plate 6, an air outlet valve 9 is arranged on the communication hole, the air outlet valve 9 is a one-way valve, the one-way valve enables the air in the air pressure chamber 7 to enter the expansion chamber 8, and the air in the expansion chamber 8 cannot flow back into the air pressure chamber 7. The movable contact rod 2 is fixed on the partition plate 6, and the movable arc contact 4 at the front end of the movable contact rod 2 stretches into the expansion chamber 8 so that the movable arc contact 4 can be in sliding butt joint with and separated from the static arc contact.
As shown in fig. 2, in order to reduce energy loss in the air cylinder 5 during switching-off and arc extinguishing and reduce air compression reaction force and operation work during switching-off operation, an air cylinder 10 sleeved on the movable contact rod 2 is further arranged in the movable end supporting seat 1, the air cylinder 10 is of a cylinder structure with openings at the front end and the rear end, the front end of the air cylinder 10 stretches into the air compression chamber 7 from the rear end of the air cylinder 5 so that gas in the air compression chamber 7 can backwards enter the air cylinder 10, a guide ring protruding outwards is arranged at the outer side of a cylinder opening of the air cylinder 10 and is in sliding fit with the inner wall of the air compression chamber 7, an air inlet hole is formed in the guide ring, an air inlet valve 11 for supplying air to the air compression chamber 7 is arranged on the air inlet hole, and the air inlet valve 11 is also a one-way valve so that the air in the air compression chamber 7 can be pressed into the air during switching-on of a circuit breaker.
As shown in fig. 2, an energy storage spring 12 and an energy storage plate 13 are arranged in the air cylinder 10, the energy storage plate 13 is an annular plate sleeved on the movable contact rod 2, the energy storage spring 12 is a pressure spring sleeved on the periphery of the movable contact rod 2, and the rear end of the pressure spring is propped against the mounting plate 3. The energy storage plate 13 and the movable contact rod 2 are in sliding fit, the energy storage plate 13 is slidably assembled in the air cylinder 10, the energy storage plate 13 can be pushed backwards by air when the air pressure in the air pressure chamber 7 is overlarge, and the energy storage spring 12 is compressed so as to store air in the air cylinder 10, so that the energy storage plate 13 and the air cylinder 10 enclose an air temporary storage cavity positioned on the front side of the energy storage plate 13, and the air temporary storage cavity is communicated with the air pressure chamber 7 and is used for temporarily storing air when the air in the switching-off air pressure chamber 7 of the arc extinguishing chamber is compressed. When the breaker is closed, the air pressure in the air pressure chamber 7 is reduced, and the energy storage spring 12 can push the energy storage plate 13 forwards to press the air stored in the air temporary storage cavity into the air pressure chamber 7. As shown in fig. 2, a blocking edge 18 for limiting the energy storage plate 13 from being pulled out forward is arranged at the front end nozzle of the air storage cylinder 10, and the blocking edge 18 is perpendicular to the cylinder body and expands outwards circumferentially to block the annular energy storage plate 13 in the air storage cylinder 10.
As shown in fig. 2, in order to prevent the air reservoir 10 and the mounting plate 3 from being suffocated in the air reservoir 10 at the rear side of the energy storage plate 13 after being fixed, the energy storage plate 13 cannot move backward, a mounting plate through hole 14 is formed in the mounting plate 3 at the rear end of the air reservoir 10, and the mounting plate through hole 14 penetrates through the mounting plate 3 and is communicated with the outside, so that the air at the rear side of the energy storage plate 13 is discharged when the energy storage plate 13 moves backward. In this embodiment, the conventional length of the storage spring 12 is greater than the body of the air cylinder 10, and the storage spring 12 is pre-compressed and installed in the air cylinder 10. As shown in fig. 2, a spacer 19 is further provided between the mounting plate 3 and the spring to prevent the spring from being worn against the mounting plate 3.
In the present invention, the energy storage spring 12 is pre-compressed and installed in the air cylinder 10, and the specific pre-compression amount is determined according to the size of the arc extinguishing chamber and the arc extinguishing requirement. Because the energy storage spring 12 has a certain precompression amount, the energy storage spring 12 still keeps higher pressure in the pressure chamber 7 at the tail end of the release elastic stroke, after the elastic force of the energy storage spring 12 is completely released, the gas in the pressure chamber 7 still flows to the expansion chamber 8 and then is sprayed to the moving arc contact 4, and the electric arc at the moving arc contact 4 has higher blowing-out effect, so that the switching-off stroke of the moving contact rod 2 can be effectively shortened in the switching-off process of the arc extinguishing chamber, and under the action of the energy storage spring 12, even if the moving contact rod 2 does not move any more, the sufficient high-pressure gas can be supplied to the expansion chamber 8.
As shown in fig. 2, in order to make the air reservoir 10 firmly assembled on the mounting plate 3, the rear end of the air reservoir 10 is provided with an air reservoir flange 16, a fixing bolt 17 is inserted forward on the rear side surface of the mounting plate 3, and a threaded hole matched with the fixing bolt 17 is formed on the air reservoir flange 16, so that the mounting plate 3 and the air reservoir 10 are tightly connected. When the air cylinder 10 is installed, a boss 15 protruding forward is further arranged on the mounting plate 3 for positioning, the movable contact rod 2 penetrates through the boss 15 to extend forward, and the inner wall of the air cylinder 10 is matched with the outer peripheral surface of the boss 15 in a positioning mode.
In this embodiment, the outer ring cylindrical surface of the energy storage plate 13 is in sliding fit with the inner wall of the air cylinder 10, the inner ring cylindrical surface is in sliding fit with the outer peripheral surface of the movable contact rod 2, the front side surface of the energy storage plate 13 is a plane, the front end blocking edge 18 of the air cylinder 10 is in blocking fit and contacts with the air pressing chamber 7, the rear side surface is provided with a cylindrical boss 15, and the cylindrical boss 15 is used for fixing the energy storage spring 12. The energy storage plate 13 is provided with a spring mounting boss 23 extending into the energy storage spring 12 on the side facing the energy storage spring 12, and the energy storage plate 13 and the energy storage spring 12 are connected and fastened through the spring mounting boss 23.
In this embodiment, since the air cylinder 10 has a cylindrical structure with both front and rear ends open, the rear end opening of the air cylinder 10 forms an air vent of the air cylinder 10, and the air vent is communicated with the mounting plate through hole 14 to discharge air out of the air cylinder 10. The stop edge 18 of the cylinder opening of the air cylinder 10 forms an energy storage plate stop structure for limiting the energy storage plate 13. In other embodiments, the air reservoir is a cylindrical structure with one end closed and the other end open. The open end of the air cylinder is arranged towards the front end, a blocking edge is arranged at the open end of the air cylinder to block the energy storage plate, and the closed end at the bottom of the air cylinder is connected with the mounting plate. At this time, a penetrating hole for the movable feeler lever to pass through is formed in the cylinder bottom sealing plate of the air cylinder, and a vent hole communicated with the mounting plate through hole is formed in the cylinder bottom plate at the same time.
The working process of the movable end assembly in the embodiment when the arc extinguishing chamber is opened is as follows: firstly, in the switching-off overtravel stage, a pressure chamber 7 is compressed, gas in the pressure chamber 7 enters an expansion chamber 8 through a gas outlet valve 9, the pressure of the expansion chamber 8 is increased, after entering an arcing stage, the expansion chamber 8 absorbs arc energy, the pressure is rapidly increased, and the gas outlet valve 9 is closed; along with the opening of the arc extinguishing chamber, the pressure chamber 7 is continuously compressed to continuously increase the air pressure in the pressure chamber 7, the high-pressure air can push the energy storage plate 13 at the rear end of the pressure chamber 7 to press the energy storage spring 12, and when the pressure value in the pressure chamber 7 exceeds the pressure value in the expansion chamber 8, the high-pressure air can continuously open the air outlet valve 9 to convey the high-pressure air into the expansion chamber 8, so that the electric arc is continuously blown out. When the pressure of the high-pressure gas in the expansion chamber 8 and the pressure chamber 7 is reduced, the energy storage spring 12 can rebound, so that the energy storage plate 13 is pushed and the gas in the gas storage cylinder 10 is rapidly pressed into the pressure chamber 7, so that the gas entering the pressure chamber 7 still keeps high pressure, and the high-pressure gas continuously enters the expansion chamber 8 for arc blowing. The working process of the movable end assembly when the arc extinguish chamber is switched on is that the energy storage spring 12 pushes the energy storage plate 13 to the port of the air cylinder 10, at the moment, the operation mechanism is controlled to switch on, the movable contact rod 2 and the air cylinder 5 move forwards, the air inlet valve 11 is opened to supplement air for the air cylinder 7, and the movable arc contact 4 at the front end of the movable contact rod 2 can be in butt joint with the static arc contact to realize circuit conduction.
Compared with the traditional pressure relief structure which is needed to discharge the gas in the gas compressing chamber through the pressure relief structure when the switch-off is carried out by the gas storage cylinder 10, the invention has the advantages that the gas in the gas compressing chamber is reserved by the gas storage cylinder 10 and is reused under the action of the energy storage spring 12, the gas is discharged to the expansion chamber for arc extinction, the waste of operation work is reduced, the gas counter-force during the switch-off operation is reduced, the operation work of the mechanism is reduced, the mechanical reliability of the circuit breaker is improved, the manufacturing cost of the circuit breaker is reduced, the flexible design of the diameter of the gas compressing chamber and the stroke of the arc-extinguishing chamber is realized, and the personalized requirement of engineering application is met.
Specific embodiment 2 of the circuit breaker provided by the invention:
the difference from embodiment 1 is that in embodiment 1, the energy storage spring 12 is a compression spring, and the compression spring is pre-compressed and installed in the air cylinder 10. In this embodiment, the conventional length of the energy storage spring is smaller than the length of the cylinder body of the air cylinder, and the spring can be directly installed in the energy storage cylinder.
Specific embodiment 3 of the circuit breaker provided by the invention:
unlike embodiment 1, in embodiment 1, the rear end of the air cylinder 10 is provided with an air cylinder flange 16, and the air cylinder 10 is fixed to the mounting plate 3 via the air cylinder flange 16. In this embodiment, the cylinder wall of the air cylinder is made thick, at this time, a bolt can be inserted through the rear side of the mounting plate, and a threaded hole adapted to the bolt is formed in the rear end surface of the air cylinder, so that the air cylinder and the mounting plate are fixed.
Specific embodiment 4 of the circuit breaker provided by the invention:
unlike embodiment 1, in embodiment 1, the energy storage plate stopping structure is a stopping edge 18 provided at the nozzle of the air cylinder 10. In this embodiment, the front end nozzle of the energy storage barrel is of an equal diameter structure, and the energy storage plate blocking structure is a retainer ring or a baffle plate welded at the nozzle. In other embodiments, the energy storage plate blocking structure may also be a bolt or a pin which is perpendicular to the cylinder wall of the air cylinder and is penetrated and fixed, and the bolt or the pin blocks the energy storage plate.
Specific embodiment 5 of the circuit breaker provided by the invention:
unlike embodiment 1, in embodiment 1, the energy storage spring 12 is sleeved on the periphery of the movable contact rod 2. In this embodiment, the energy storage spring is a plurality of springs that extend back and forth of equipartition in the clearance between movable feeler lever and gas receiver, and each spring one end roof pressure is on the mounting panel, and the other end all is with energy storage board trailing flank fixed connection.
Specific embodiment 6 of the circuit breaker provided by the invention:
unlike embodiment 1, in embodiment 1, a boss 15 protruding forward is provided on the mounting plate 3, and the movable contact rod 2 passes through the boss 15, and the inner wall of the air cylinder 10 is in positioning fit with the outer peripheral surface of the boss 15. In this embodiment, the gas holder rear end sets up beyond the convex boss in back to set up on the mounting panel with boss outer peripheral face location complex mounting hole to make the gas holder rear end wear to set up the location on the mounting panel.
Specific embodiment 7 of the circuit breaker provided by the invention:
unlike embodiment 1, in embodiment 1, the side of the energy storage plate 13 facing the energy storage spring 12 is provided with a spring mounting boss protruding into the energy storage spring 12. In this embodiment, the energy storage plate is provided with a groove, and the energy storage spring extends into the groove on the energy storage plate to be matched and fixed.
Specific embodiment 8 of the circuit breaker provided by the invention:
the difference from embodiment 1 is that in embodiment 1, the front end of the air cylinder has no stop edge to be in stop fit with the energy storage spring 12, and in this embodiment, the air cylinder extends forward to a certain dimension in the air compressing chamber, and the end of the travel of the energy storage plate moving towards the air compressing chamber is always in the air cylinder.
The specific embodiment of the arc extinguishing chamber provided by the invention comprises:
the arc-extinguishing chamber comprises a static end component and a dynamic end component, and is assembled in the circuit breaker when in use so as to blow out an arc generated when the circuit breaker is opened. The structure and composition of the arc extinguishing chamber are the same as those of the arc extinguishing chamber in the above embodiments, and are not described herein.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An arc extinguishing chamber comprises a static end assembly and a moving end assembly, wherein the static end assembly comprises a static arc contact and a static end supporting seat, and the moving end assembly comprises a moving end supporting seat (1) and a moving contact; the movable contact is assembled on the movable end supporting seat (1) in a front-back guiding and sliding way, and comprises a movable contact rod (2), a movable arc contact (4) positioned at the front end of the movable contact rod (2) and a pressure cylinder (5) positioned at the periphery of the movable arc contact (4); an air pressing chamber (7) and an expansion chamber (8) are arranged in the air pressing cylinder (5), the air pressing chamber (7) and the expansion chamber (8) are separated by a partition plate (6), and a moving arc contact (4) is positioned at the front side of the partition plate (6), and the air pressing cylinder is characterized in that an air storage cylinder (10) sleeved outside a moving contact rod (2) is arranged on a moving end supporting seat (1), and the front end opening of the air storage cylinder (10) is communicated with the air pressing chamber (7) to supply air in the air pressing chamber (7) to enter the air storage cylinder (10); an energy storage spring (12) and an energy storage plate (13) are arranged in the air cylinder (10), and the movable contact rod (2) passes through the energy storage plate (13) and is in sliding fit with the energy storage plate (13) back and forth; the energy storage plate (13) is slidably assembled in the air storage cylinder (10), the energy storage plate (13) is used for enclosing with the air storage cylinder (10) to form a gas temporary storage cavity positioned at the front side of the energy storage plate (13), the gas temporary storage cavity is communicated with the air pressing chamber (7) and used for temporarily storing gas when the gas in the switching-off air pressing chamber (7) of the arc extinguishing chamber is compressed, and the energy storage spring (12) is used for providing forward elasticity for the energy storage plate (13); the rear end of the air cylinder (10) is provided with a vent hole so as to discharge air at the rear side of the energy storage plate (13) when the energy storage plate (13) moves backwards.
2. The arc extinguishing chamber according to claim 1, characterized in that the movable end supporting seat (1) comprises a cylindrical seat body and a mounting plate (3) fixed in the cylindrical seat body, the movable contact rod (2) is assembled on the mounting plate (3) in a front-back guiding sliding manner, the rear end of the air storage cylinder (10) is fixed on the mounting plate (3), the rear end opening of the air storage cylinder (10) forms the air vent, and a mounting plate through hole (14) communicated with the air vent is formed in the mounting plate (3).
3. An arc chute according to claim 2, characterized in that the rear end of the gas cylinder (10) is provided with a gas cylinder flange (16), the gas cylinder (10) being fixed to the mounting plate (3) by means of the gas cylinder flange (16).
4. The arc chute according to claim 2, characterized in that the rear end of the energy storage spring (12) is pressed against the mounting plate (3).
5. An arc chute as claimed in any one of claims 1 to 4, wherein the front end of the gas cylinder (10) is provided with a storage plate stop structure for limiting the forward withdrawal of the storage plate (13).
6. The arc chute as claimed in claim 5, wherein said energy storage spring (12) is pre-compressed mounted in the air reservoir (10).
7. The arc extinguishing chamber according to claim 5, wherein the blocking structure of the energy storage plate (13) is a blocking edge (18) arranged at the front end opening of the air cylinder (10), and the blocking edge (18) is used for being matched with the front and back blocking of the energy storage plate (13) to limit the energy storage plate (13) from falling off.
8. The arc chute as claimed in any one of claims 1 to 4, wherein the energy storage spring (12) is sleeved on the periphery of the movable contact rod (2).
9. An arc chute as claimed in any one of claims 1 to 4, wherein the partition (6) is provided with a gas outlet valve (9) for gas from the plenum (7) into the expansion chamber (8), the gas outlet valve (9) being a one-way valve.
10. The arc extinguishing chamber according to any one of claims 2 to 4, characterized in that a boss (15) protruding forward is arranged on the mounting plate (3), the movable contact rod (2) penetrates through the boss (15), and the inner wall of the air storage cylinder (10) is matched with the outer peripheral surface of the boss (15) in a positioning mode.
11. An arc chute as claimed in any one of claims 1 to 4, wherein the energy storage plate (13) has an outer cylindrical surface in sliding engagement with the inner wall surface of the cylinder (10) and an inner cylindrical surface in sliding engagement with the movable contact rod (2).
12. An arc chute as claimed in any one of claims 1 to 4, wherein the side of the energy storage plate (13) facing the energy storage spring (12) is provided with a spring mounting boss extending into the energy storage spring (12).
13. A circuit breaker comprising a frame, an arc-extinguishing chamber arranged on the frame and an operating mechanism arranged on the frame, wherein the arc-extinguishing chamber comprises a static end component and a moving end component, and the operating mechanism is used for driving the moving end component of the arc-extinguishing chamber to move, and is characterized in that the arc-extinguishing chamber is the arc-extinguishing chamber according to any one of claims 1-12.
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| CN202111593243.7A CN114758921B (en) | 2021-12-23 | 2021-12-23 | Explosion chamber and use circuit breaker of this explosion chamber |
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| CN202111593243.7A CN114758921B (en) | 2021-12-23 | 2021-12-23 | Explosion chamber and use circuit breaker of this explosion chamber |
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| CN114758921A CN114758921A (en) | 2022-07-15 |
| CN114758921B true CN114758921B (en) | 2024-03-26 |
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| CN116131422B (en) * | 2023-04-04 | 2023-07-04 | 四川电器集团中低压智能配电有限公司 | Energy storage signal amplifying device of high-voltage switch cabinet vacuum arc-extinguishing chamber |
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| CN114758921A (en) | 2022-07-15 |
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