CN112635230A - Circuit breaker and double-acting arc extinguishing chamber - Google Patents
Circuit breaker and double-acting arc extinguishing chamber Download PDFInfo
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- CN112635230A CN112635230A CN202011131922.8A CN202011131922A CN112635230A CN 112635230 A CN112635230 A CN 112635230A CN 202011131922 A CN202011131922 A CN 202011131922A CN 112635230 A CN112635230 A CN 112635230A
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- rack
- static
- double
- side rack
- acting
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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
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
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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
- H01H33/42—Driving mechanisms
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a double-acting arc extinguish chamber of a circuit breaker, and provides the circuit breaker and the double-acting arc extinguish chamber. Double acting explosion chamber, including quiet end subassembly, move end subassembly and double acting linkage structure, double acting linkage structure includes: the driving side rack is fixedly connected to the movable end assembly and is used for the front and back actions of the follow-up end assembly; the driven side rack is fixedly connected to the static arc contact and is used for driving the static arc contact to move back and forth; the reversing gear is rotatably arranged in the arc extinguishing chamber and is used for being meshed with the driving side rack and the driven side rack simultaneously; double acting explosion chamber still includes: the movable end rack seat and the static end rack seat are respectively used for front and back guide assembly of the driving side rack and the driven side rack; the movable end rack seat and the static end rack seat are fixed on the inner wall of the static support and are arranged oppositely; and a transmission arm is fixed at one end of the driven side rack close to the movable end component, and the transmission arm is fixedly connected with the static arc contact. The scheme solves the problems of large quantity of parts and complex structure of the existing double-acting arc extinguish chamber.
Description
Technical Field
The invention relates to a double-acting arc extinguishing chamber of a circuit breaker.
Background
With the rapid development of national economic construction and electric power science and technology, the industrial and living electrification degree is high, and the requirements on the electric power demand and the electric energy quality are increasingly improved. The safe and reliable operation and cost reduction of circuit breaker products are the goals of increasing attention. The arc extinguishing chamber is used as a core component of the circuit breaker, and has important significance in arc extinguishing capability, requirements on operation power, space occupation and the like. In order to improve the arc extinguishing capability of the arc extinguishing chamber, a double-acting arc extinguishing chamber is provided in the prior art, a static arc contact of the double-acting arc extinguishing chamber is arranged in a mode of guiding and moving, and a double-acting linkage structure is arranged between the static arc contact and a moving end part of the arc extinguishing chamber. The double-acting linkage structure comprises a connecting rod transmission form, a gear and rack transmission form, a shifting fork sliding groove transmission form and the like, and is used for enabling the static arc contact to move when the switch is switched on and switched off.
In the existing arc extinguish chamber structure, the connecting rod transmission type double-acting structure has the advantages that the connecting rod at the movable end and the fixed end is easy to deflect and deform and even can collide with parts such as a static support, so that the action is unstable and unreliable; the double-acting structure in the form of shifting fork chute transmission and the double-acting structure in the form of gear rack transmission are respectively a double-shifting fork structure and a double-gear rack structure disclosed in Chinese patent document with the publication number of CN107658175A, for the double-acting structure in the form of shifting fork chute transmission, a linkage structure mounting seat (namely a guide rail in the patent document) needs to be arranged in a static support of a static end component, a push-pull rod needs to be provided with a transmission pin and the like matched with the shifting fork chute, and the arc extinguish chamber has more static end parts, complex structure, high research and development cost, large material usage amount and heavy weight; for a double-acting structure in a gear and rack transmission mode, a linkage structure mounting seat needs to be arranged in a static support of a static end assembly, and the problems of more static end parts and complex structure of an arc extinguish chamber exist.
Disclosure of Invention
The invention aims to provide a double-acting arc extinguish chamber of a circuit breaker, which solves the problems of more parts and complex structure of the existing double-acting arc extinguish chamber; the invention also aims to provide a circuit breaker, which solves the problems of large quantity of double-acting arc extinguish chamber parts and complex structure of the existing circuit breaker.
The double-acting arc extinguish chamber adopts the following technical scheme:
double acting explosion chamber includes:
the static end assembly comprises a static support and a static arc contact, and the static arc contact is arranged on the static support in a front-back guiding manner;
the moving end assembly is used for moving back and forth under the driving of the operating mechanism so as to realize opening and closing;
double acting linkage structure for take the action of sound arc contact when moving the end subassembly action, include:
the driving side rack is fixedly connected to the movable end assembly and is used for the front and back actions of the follow-up end assembly;
the driven side rack is fixedly connected to the static arc contact and is used for driving the static arc contact to move back and forth;
the reversing gear is rotatably arranged in the arc extinguishing chamber and is used for being meshed with the driving side rack and the driven side rack simultaneously;
double acting explosion chamber still includes:
the movable end rack seat and the static end rack seat are respectively used for front and back guide assembly of the driving side rack and the driven side rack;
the movable end rack seat and the static end rack seat are fixed on the inner wall of the static support and are arranged oppositely;
and a transmission arm is fixed at one end of the driven side rack close to the movable end component, and the transmission arm is fixedly connected with the static arc contact.
Has the advantages that: by adopting the technical scheme, the movable end rack seat and the static end rack seat are arranged on the inner wall of the static support, so that the guide assembly of the driving side rack and the driven side rack can be directly realized, and meanwhile, the transmission of the driven side rack and the static arc contact can be realized through the transmission arm, so that the double-acting linkage of the arc extinguish chamber is realized; compared with the prior art in which the platy linkage structure mounting seat is arranged in the static support, the scheme can effectively reduce the number of parts, simplify the structure and reduce the cost.
As a preferred technical scheme: the reversing gear comprises a large gear part and a small gear part, and the reference circle diameter of the large gear part is larger than that of the small gear part;
the large gear part is meshed with a driving side rack, and the small gear part is meshed with a driven side rack.
Has the advantages that: by adopting the technical scheme, the movement speed of the driven side rack is lower than that of the driving side rack, the requirement on the operation function of the operating mechanism is low, and the cost is favorably reduced.
As a preferred technical scheme: the number of the movable end rack seats is more than two, and the movable end rack seats are arranged at intervals from front to back;
the static end rack seats are more than two, and the static end rack seats are arranged at intervals in the front and back.
Has the advantages that: by adopting the technical scheme, good guiding of the driving side rack and the driven side rack can be ensured, and the transmission stability is improved.
As a preferred technical scheme: and the meshing point of the reversing gear and the driven side rack is positioned between two adjacent static end rack seats.
Has the advantages that: by adopting the technical scheme, the driven side rack can be better prevented from generating flexural deformation under the action of the reversing gear, so that the action reliability and the transmission precision of the mechanism can be improved.
As a preferred technical scheme: the length of the driving side rack is greater than that of the driven side rack, and the number of the movable end rack seats is greater than that of the static end rack seats.
Has the advantages that: by adopting the technical scheme, the number of the rack seats can be reasonably arranged according to the length of the rack, so that the cost is reduced, and the rack is convenient to assemble and disassemble.
As a preferred technical scheme: when the arc extinguish chamber is in the opening position and the closing position, more than two gear teeth are arranged on the reversing gear on two sides of any one meshing point of the rack.
Has the advantages that: by adopting the technical scheme, the reliable limit of the gear and the rack can be realized, the meshing of the reversing gear and the corresponding rack is ensured, and the accurate positioning of the static arc contact is ensured.
As a preferred technical scheme: the movable end assembly comprises a large nozzle, a rack connecting seat is arranged on the large nozzle, and the rack connecting seat is assembled on the static support in a guiding mode.
Has the advantages that: by adopting the technical scheme, the movable end component can be guided through the rack connecting seat, the stable motion of the movable end component is ensured, and the reliable work of the double-acting linkage structure is further ensured.
As a preferred technical scheme: the driven side rack and the transmission arm are arranged in an L shape.
Has the advantages that: by adopting the technical scheme, the lateral force perpendicular to the front and back directions is favorably reduced, and the stability of the rack action is improved.
As a preferred technical scheme: the driven side rack and the transmission arm are of an integrated structure.
Has the advantages that: by adopting the technical scheme, the structure is reliable, the number of parts is small, and the assembly is convenient.
The circuit breaker adopts the following technical scheme:
the circuit breaker comprises a double-acting arc extinguish chamber and an operating mechanism, wherein the operating mechanism is used for driving a moving end component of the double-acting arc extinguish chamber to act;
double acting explosion chamber includes:
the static end assembly comprises a static support and a static arc contact, and the static arc contact is arranged on the static support in a front-back guiding manner;
the moving end assembly is used for moving back and forth under the driving of the operating mechanism so as to realize opening and closing;
double acting linkage structure for take the action of sound arc contact when moving the end subassembly action, include:
the driving side rack is fixedly connected to the movable end assembly and is used for the front and back actions of the follow-up end assembly;
the driven side rack is fixedly connected to the static arc contact and is used for driving the static arc contact to move back and forth;
the reversing gear is rotatably arranged in the arc extinguishing chamber and is used for being meshed with the driving side rack and the driven side rack simultaneously;
double acting explosion chamber still includes:
the movable end rack seat and the static end rack seat are respectively used for front and back guide assembly of the driving side rack and the driven side rack;
the movable end rack seat and the static end rack seat are fixed on the inner wall of the static support and are arranged oppositely;
and a transmission arm is fixed at one end of the driven side rack close to the movable end component, and the transmission arm is fixedly connected with the static arc contact.
Has the advantages that: by adopting the technical scheme, the movable end rack seat and the static end rack seat are arranged on the inner wall of the static support, so that the guide assembly of the driving side rack and the driven side rack can be directly realized, and meanwhile, the transmission of the driven side rack and the static arc contact can be realized through the transmission arm, so that the double-acting linkage of the arc extinguish chamber is realized; compared with the prior art in which the platy linkage structure mounting seat is arranged in the static support, the scheme can effectively reduce the number of parts, simplify the structure and reduce the cost.
As a preferred technical scheme: the reversing gear comprises a large gear part and a small gear part, and the reference circle diameter of the large gear part is larger than that of the small gear part;
the large gear part is meshed with a driving side rack, and the small gear part is meshed with a driven side rack.
Has the advantages that: by adopting the technical scheme, the movement speed of the driven side rack is lower than that of the driving side rack, the requirement on the operation function of the operating mechanism is low, and the cost is favorably reduced.
As a preferred technical scheme: the number of the movable end rack seats is more than two, and the movable end rack seats are arranged at intervals from front to back;
the static end rack seats are more than two, and the static end rack seats are arranged at intervals in the front and back.
Has the advantages that: by adopting the technical scheme, good guiding of the driving side rack and the driven side rack can be ensured, and the transmission stability is improved.
As a preferred technical scheme: and the meshing point of the reversing gear and the driven side rack is positioned between two adjacent static end rack seats.
Has the advantages that: by adopting the technical scheme, the driven side rack can be better prevented from generating flexural deformation under the action of the reversing gear, so that the action reliability and the transmission precision of the mechanism can be improved.
As a preferred technical scheme: the length of the driving side rack is greater than that of the driven side rack, and the number of the movable end rack seats is greater than that of the static end rack seats.
Has the advantages that: by adopting the technical scheme, the number of the rack seats can be reasonably arranged according to the length of the rack, so that the cost is reduced, and the rack is convenient to assemble and disassemble.
As a preferred technical scheme: when the arc extinguish chamber is in the opening position and the closing position, more than two gear teeth are arranged on the reversing gear on two sides of any one meshing point of the rack.
Has the advantages that: by adopting the technical scheme, the reliable limit of the gear and the rack can be realized, the meshing of the reversing gear and the corresponding rack is ensured, and the accurate positioning of the static arc contact is ensured.
As a preferred technical scheme: the movable end assembly comprises a large nozzle, a rack connecting seat is arranged on the large nozzle, and the rack connecting seat is assembled on the static support in a guiding mode.
Has the advantages that: by adopting the technical scheme, the movable end component can be guided through the rack connecting seat, the stable motion of the movable end component is ensured, and the reliable work of the double-acting linkage structure is further ensured.
As a preferred technical scheme: the driven side rack and the transmission arm are arranged in an L shape.
Has the advantages that: by adopting the technical scheme, the lateral force perpendicular to the front and back directions is favorably reduced, and the stability of the rack action is improved.
As a preferred technical scheme: the driven side rack and the transmission arm are of an integrated structure.
Has the advantages that: by adopting the technical scheme, the structure is reliable, the number of parts is small, and the assembly is convenient.
For the subject to be protected by the present patent, each preferred technical solution under the same subject may be adopted alone, and when the preferred technical solutions under the same subject can be combined, two or more preferred technical solutions under the same subject may be arbitrarily combined, and the technical solutions formed by the combination are not specifically described here, and are included in the description of the present patent in this form.
Drawings
Fig. 1 is a schematic structural diagram of a double-acting arc-extinguishing chamber in embodiment 1 of the present invention, the double-acting arc-extinguishing chamber is in a closing state; the structure of the double-acting arc-extinguishing chamber in one embodiment of the circuit breaker is also shown schematically;
fig. 2 is a schematic structural view of the double-acting arc extinguishing chamber in fig. 1 in an opening state;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 10-an insulating sleeve, 20-a stationary end component, 21-a stationary support, 22-a stationary arc contact, 23-a stationary contact, 24-a stationary contact guide seat, 25-a rack joint, 30-a moving end component, 31-a moving contact, 32-a large nozzle, 33-a small nozzle, 34-a moving arc contact, 35-an insulating pull rod, 36-a rack connecting seat, 37-a moving support, 40-a double-acting linkage structure, 41-a driving side rack, 42-a driven side rack, 43-a reversing gear, 44-a moving end rack seat, 45-a stationary end rack seat, 46-a transmission arm, 47-a large gear part and 48-a small gear part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are 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. Also, the terms "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, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The invention relates to a double-acting arc extinguishing chamber:
as shown in fig. 1 and 2, the double acting arc chute is an arc chute used in a column type circuit breaker, and includes an insulating sleeve 10, and the insulating sleeve 10 is used to form a closed gas chamber to be filled with SF6An arc-extinguishing gas; inside the insulating sleeve 10 is provided withA stationary end assembly 20, a moving end assembly 30 and a double acting linkage 40.
The static end assembly 20 comprises a static support 21, a static arc contact 22 and a static contact 23, wherein a static contact guide seat 24 is arranged on the static support 21, and the static arc contact 22 is arranged on the static contact guide seat 24 in a front-back guiding manner.
The moving end component 30 comprises a moving contact 31, a large nozzle 32, a small nozzle 33, a moving arc contact 34 and an insulating pull rod 35, the moving contact 31 is guided and assembled in a moving support 37 on the arc extinguish chamber, and the insulating pull rod 35 is fixed with the moving contact.
The double-acting linkage structure 40 includes a driving-side rack 41, a driven-side rack 42, and a reversing gear 43. The driving side rack 41 is fixedly connected to the rack connecting seat 36 of the movable end assembly 30 and is used for the front and back movement of the follow-up end assembly 30; the inner wall of the static support 21 is provided with a movable end rack seat 44, and the movable end rack seat 44 is used for front and back guiding assembly of the driving side rack 41. The driven side rack 42 is fixedly connected to the static arc contact 22 and is used for driving the static arc contact 22 to move back and forth; and a static end rack seat 45 is arranged on the inner wall of the static support 21, and the static end rack seat 45 is used for front and back guiding assembly of the driven side rack 42. The reversing gear 43 is rotatably disposed in the arc extinguishing chamber for simultaneous engagement with the driving-side rack 41 and the driven-side rack 42. Due to the fact that the driving side rack 41 and the static arc contact 22 are spaced along the radial direction of the static support 21, a transmission arm 46 is fixed to one end, close to the driving end assembly 30, of the driven side rack 42, and the transmission arm 46 is fixedly connected with the static arc contact 22.
During operation, as shown in fig. 1, at this time, the arc extinguish chamber is in a closing state, and when opening is required, the moving end assembly 30 moves to the right side in the figure under the action of the operating mechanism, the driving side rack 41 moves to the right side in the figure along with the movement of the driving side rack 41, the reversing gear 43 is driven to rotate anticlockwise, and meanwhile, the reversing gear 43 drives the driven side rack 42 to move to the left side in the figure, so as to drive the static arc contact 22 to move back to the moving end assembly 30, and thus the linkage of the static arc contact 22 is. The state after opening is shown in fig. 2. When the switch needs to be switched on, the arc extinguish chamber acts reversely.
Example 1 of the double acting arc chute of the circuit breaker described above:
as shown in fig. 1 and 2, the reversing gear 43 is directly mounted on the static support 21 through a rotating shaft, and includes a large gear portion 47 and a small gear portion 48, wherein the large gear portion 47 is an AOB portion in the figure, and the small gear portion 48 is a COD portion in the figure. The large gear portion 47 and the small gear portion 48 are coaxially arranged, the pitch circle diameter of the large gear portion 47 is larger than that of the small gear portion 48, the large gear portion 47 is engaged with the driving side rack 41, and the small gear portion 48 is engaged with the driven side rack 42. The radian of the large gear part 47 is slightly smaller than a semicircle, and the radian of the small gear part 48 is slightly larger than a semicircle, so that the large gear part 47 can be prevented from interfering with the driven side rack 42 when the brake is opened in place and the brake is closed in place. In order to avoid the flexible deformation of the driven side rack 42 as much as possible, the meshing point of the reversing gear 43 and the driven side rack 42 is located between two adjacent stationary rack seats 45.
As shown in fig. 1 and 2, the movable rack holder 44 and the stationary rack holder 45 are guide blocks fixed to the inner wall of the stationary support 21 by screws, and correspondingly, the main bodies of the driving rack 41 and the driven rack 42 are in the form of slide rails. The guiding by the cooperation of the guide block and the slide rail is a conventional technology, and the specific structure is not described in detail here. The length of the driving side rack 41 is greater than that of the driven side rack 42, correspondingly, three movable end rack seats 44 are arranged, and the movable end rack seats 44 are arranged at intervals in the front and back; the number of the movable end rack seats 44 is more than two, and the movable end rack seats 44 are arranged at intervals in the front-back direction.
As shown in fig. 1 and 2, when the arc extinguishing chamber is in the opening position and the opening position, two or more gear teeth are arranged on two sides of the meshing point of the reversing gear 43 and the driving side rack 41 and the driven side rack 42. Specifically, when the arc extinguishing chamber is in the opening position and the opening position, two or more gear teeth are still provided between the meshing point of the reversing gear 43 and the driving side rack 41 and the end of the large gear portion 47, and two or more gear teeth are still provided between the meshing point of the reversing gear 43 and the driven side rack 42 and the end of the small gear portion 48.
As shown in fig. 1 and fig. 2, the movable contact base of the movable terminal assembly 30 is assembled in the movable support 37 in a guiding manner, and the insulating pull rod 35 is fixed to the movable contact base and is used for driving the movable contact 31, the large nozzle 32, the small nozzle 33, the movable arc contact 34 and other components to move under the driving of the operating mechanism. The rack connecting seat 36 is fixed at the front end of the large nozzle 32, and the rack connecting seat 36 is fixedly connected with the driving side rack 41 through a hinge shaft. The driving side rack 41 is a straight rack and is directly and fixedly connected with the rack connecting seat 36 on the large nozzle 32 after passing through the static contact guiding seat 24. The driven side rack 42 and the transmission arm 46 are of an integral structure, are perpendicular to each other and are arranged in an L shape; the end of the static arc contact 22 away from the moving end assembly 30 is provided with a rack joint 25, and the transmission arm 46 is directly fixed on the rack joint 25.
The opening motion process: fig. 1 is a schematic diagram of a switching-on position. After the opening motion starts, the operating mechanism pulls the insulating pull rod 35, the moving contact 31, the large nozzle 32 and the small nozzle 33 to move to the right, the large nozzle 32 drives the driving side rack 41 to move linearly to the right, the driving side rack 41 is meshed with the large gear part 47 of the reversing gear 43, so that the reversing gear 43 rotates anticlockwise at the same time and drives the driven side rack 42 to move linearly to the left, the driven side rack 42 drives the static arc contact 22 to move to the left and move to the opening motion at the same time, and finally the moving end and the static end are moved to open the opening motion at the same time. When the brake is opened, the position of the reversing gear 43 meshed with the driven side rack 42 is also at the position of two teeth away from the right end of the OB line, so that the limiting effect is achieved, and the accurate positioning of the static arc contact 22 and the meshing of the reversing gear 43 and the corresponding rack are guaranteed. Because the AOB part and the COD part of the reversing gear 43 are the same circle center, the displacement ratio of the opening motion of the movable end and the static end is OA/OC, and the opening and closing performance of the circuit breaker can be improved. Because the driving side rack 41 and the driven side rack 42 both move linearly and have guidance, compared with the existing connecting rod transmission form, the connecting rod transmission form can avoid deformation of the connecting rod and collision with other parts.
The closing motion process is as follows: FIG. 2 is a schematic diagram of the open position. After the switching-on motion starts, the operating mechanism pulls the insulating pull rod 35, the moving contact 31, the large nozzle 32 and the small nozzle 33 to perform the switching-on motion to the left, the large nozzle 32 drives the driving side rack 41 to perform the linear motion to the left, the driving side rack 41 is meshed with the large gear part 47 of the reversing gear 43, so that the reversing gear 43 simultaneously rotates clockwise and drives the driven side rack 42 to perform the linear motion to the right, the driven side rack 42 drives the static arc contact 22 to perform the switching-on motion to the right simultaneously, and finally the simultaneous switching-on motion of the dynamic end and the static end is realized. And the position of the reversing gear 43 meshed with the driving side rack 41 is also at the position of two teeth away from the right end of the OB line until the switch-on position is at the bottom position, so that the limiting effect is achieved, and the accurate positioning of the static arc contact 22 and the meshing of the reversing gear 43 and the corresponding rack are ensured. The closing movement speed ratio of the moving end and the static end is the length ratio of OA and OC. If OA = OC, then closing speed is twice of moving end speed, can shorten the time of puncture in advance greatly, reduces the ablation of arc contact, main contact, provides good environment to the breaking test of later stage explosion chamber, improves the breaking performance of explosion chamber.
The double-acting arc extinguish chamber can realize the great reduction of the number of parts at the static end of the circuit breaker, has a simplified structure, reduces the maintenance cost, reduces the operation work required by the mechanism and has high operation reliability; the controllability of the motion characteristics of the movable end and the static end of the arc extinguish chamber can be realized through the reversing gear 43, the transmission characteristic of the circuit breaker is optimized, and the breaking performance of the circuit breaker is improved; meanwhile, the connecting rod does not deform and rub with other parts, so that impurities in the arc extinguish chamber can be reduced, unnecessary breakdown caused by bonding of abraded objects is avoided, the running reliability of a product is improved, and the running cost of equipment is reduced.
Example 2 of the double acting arc chute of the circuit breaker of the invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the reversing gear 43 is directly mounted on the stationary support 21 through a rotating shaft, and includes a large gear portion 47 and a small gear portion 48, whereas in this embodiment, the reversing gear 43 is a circular gear. Of course, in other embodiments, the large gear portion 47 may mesh with the driven-side rack 42 and the small gear portion 48 may mesh with the driving-side rack 41, and the ratio of the pitch circle diameter of the large gear portion 47 to the pitch circle diameter of the small gear portion 48 may be adjusted as needed according to the switching characteristic requirements of the arc extinguishing chamber.
Example 3 of the double acting arc chute of the circuit breaker of the invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the driven-side rack 42 and the transmission arm 46 are perpendicular to each other; in this embodiment, however, the transmission arm 46 is arranged obliquely with respect to the driven-side rack 42. In other embodiments, actuator arm 46 may be an arcuate actuator arm.
Example 4 of the double acting arc chute of the circuit breaker of the invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the driven-side rack 42 and the transmission arm 46 are of an integral structure, and in this embodiment, the driven-side rack 42 and the transmission arm 46 are separately arranged and fixed together by a threaded fastener.
The embodiment of the circuit breaker of the invention comprises the following components: the circuit breaker comprises a double acting arc extinguishing chamber and an operation operating mechanism, wherein the operation operating mechanism is used for driving a moving end component 30 of the double acting arc extinguishing chamber to act, and the double acting arc extinguishing chamber is the double acting arc extinguishing chamber described in any embodiment of the double acting arc extinguishing chamber and is not described in detail here.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. Double acting explosion chamber includes:
the static end assembly (20), the static end assembly (20) comprises a static support (21) and a static arc contact (22), and the static arc contact (22) is arranged on the static support (21) in a front-back guiding manner;
the moving end assembly (30) is used for moving back and forth under the driving of the operating mechanism so as to realize opening and closing;
double acting linkage structure (40) for taking sound arcing contact (22) action when moving end subassembly (30) action includes:
the driving side rack (41) is fixedly connected to the movable end assembly (30) and is used for the front and back movement of the follow-up end assembly (30);
the driven side rack (42) is fixedly connected to the static arc contact (22) and is used for driving the static arc contact (22) to move back and forth;
the reversing gear (43) is rotatably arranged in the arc extinguishing chamber and is used for being simultaneously meshed with the driving side rack (41) and the driven side rack (42);
its characterized in that, double acting explosion chamber still includes:
the movable end rack seat (44) and the static end rack seat (45) are respectively used for front and back guide assembly of the driving side rack (41) and the driven side rack (42);
the movable end rack seat (44) and the static end rack seat (45) are fixed on the inner wall of the static support (21) and are oppositely arranged;
and a transmission arm (46) is fixed at one end of the driven side rack (42) close to the movable end component (30), and the transmission arm (46) is fixedly connected with the static arc contact (22).
2. Double-action arc extinguishing chamber according to claim 1, characterized in that the reversing gear (43) comprises a bull gear part (47) and a pinion gear part (48), the pitch circle diameter of the bull gear part (47) being greater than the pitch circle diameter of the pinion gear part (48);
the large gear portion (47) meshes with the driving side rack (41), and the small gear portion (48) meshes with the driven side rack (42).
3. The double-acting arc extinguishing chamber according to claim 1 or 2, characterized in that there are more than two moving-end rack seats (44), each moving-end rack seat (44) being arranged at a distance from the front to the back;
the number of the static end rack seats (45) is more than two, and the static end rack seats (45) are arranged at intervals in the front-back direction.
4. The double-acting arc extinguishing chamber according to claim 3, characterized in that the point of engagement of the commutation pinion (43) with the driven-side rack (42) is located between two adjacent stationary-end rack seats (45).
5. Double-acting arc extinguishing chamber according to claim 3, characterized in that the length of the driving-side rack (41) is greater than the length of the driven-side rack (42), the number of moving-end rack seats (44) being greater than the number of static-end rack seats (45).
6. Double-acting arc extinguishing chamber according to claim 1 or 2, characterised in that the arc extinguishing chamber has more than two teeth on the reversing gear (43) on both sides of any rack meshing point when in the opening and closing position.
7. The double-acting arc extinguishing chamber according to claim 1 or 2, characterized in that the moving end assembly (30) comprises a large spout (32), on which large spout (32) a rack and socket (36) is provided, the rack and socket (36) being guide fitted on the static seat (21).
8. Double-acting arc extinguishing chamber according to claim 1 or 2, characterized in that the driven-side rack (42) is arranged in an L-shape with the transmission arm (46).
9. Double-acting arc extinguishing chamber according to claim 1 or 2, characterized in that the driven-side rack (42) is of one-piece construction with the transmission arm (46).
10. The circuit breaker comprises a double-acting arc extinguish chamber and an operating mechanism, wherein the operating mechanism is used for driving a moving end component (30) of the double-acting arc extinguish chamber to act;
it is characterized in that the preparation method is characterized in that,
the double acting arc extinguishing chamber is the double acting arc extinguishing chamber of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011131922.8A CN112635230B (en) | 2020-10-21 | 2020-10-21 | Circuit breaker and double-acting arc extinguishing chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011131922.8A CN112635230B (en) | 2020-10-21 | 2020-10-21 | Circuit breaker and double-acting arc extinguishing chamber |
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| CN112635230A true CN112635230A (en) | 2021-04-09 |
| CN112635230B CN112635230B (en) | 2023-03-31 |
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| Publication number | Publication date |
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| CN112635230B (en) | 2023-03-31 |
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