CN118942970B - Short-circuit protection mechanism of circuit breaker and adjusting method thereof - Google Patents
Short-circuit protection mechanism of circuit breaker and adjusting method thereof Download PDFInfo
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- CN118942970B CN118942970B CN202411301480.5A CN202411301480A CN118942970B CN 118942970 B CN118942970 B CN 118942970B CN 202411301480 A CN202411301480 A CN 202411301480A CN 118942970 B CN118942970 B CN 118942970B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title abstract description 6
- 238000012544 monitoring process Methods 0.000 claims description 31
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
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Abstract
The application relates to the technical field of circuit breakers, in particular to a circuit breaker short-circuit protection mechanism and an adjusting method thereof, comprising a circuit breaker mechanism arranged in an insulating shell, wherein the circuit breaker mechanism comprises an armature positioned in a coil, the lower extreme of coil is equipped with the current-conducting plate, the lower extreme of current-conducting plate is equipped with the contact, insulating housing's inside and be close to the position of coil are equipped with safety mechanism. The application sets the safety mechanism, sets the driving component and the connecting rod component outside the coil, sets the circuit current threshold and the temperature threshold through the processor, and disconnects the contact from the conducting plate by utilizing the connecting rod component, so that the internal circuit of the circuit breaker can be disconnected in time when the circuit current of the circuit breaker is overloaded and the magnetic field force of the coil is difficult to push the armature, the circuit breaker is set according to the requirement of the circuit breaker, the application range of the circuit breaker is enlarged, the safety of the circuit breaker connected with the circuit breaker is effectively protected, and the service life of the internal elements of the circuit breaker can be prolonged.
Description
Technical Field
The application relates to the technical field of circuit breakers, in particular to a circuit breaker short-circuit protection mechanism and an adjusting method thereof.
Background
A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and closing, carrying and breaking a current under abnormal circuit conditions within a predetermined time, and is generally composed of a contact system, an arc extinguishing system, an operating mechanism, a trip, a housing, and the like.
The circuit breaker can be used for distributing electric energy, starting the asynchronous motor infrequently, protecting a power line, the motor and the like, and automatically cutting off the circuit when serious overload or short circuit, undervoltage and other faults occur, and the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an over-under-heating relay and the like. And the parts are not required to be changed after breaking the fault current.
When short circuit, the magnetic field generated by large current (generally 10 to 12 times) overcomes the counter-force spring, the release pulls the operating mechanism to act, and the switch is tripped instantaneously.
For the related technology, when the circuit breaker is assembled, the specification of the assembled coil is determined, the magnetic field which can be generated in the coil is a fixed value, under different working environments, due to different specifications of the electric appliance, the internal circuit can bear different currents, when the internal current of the electric appliance is too large and insufficient to generate the magnetic field for pushing the armature, the circuit breaker cannot be disconnected in time, so that the internal elements of the electric appliance are damaged, and under the condition of too large current, the temperature of the coil rises, when the temperature of the coil rises, but the coil is insufficient to cause the deformation of an overload metal sheet, the internal elements of the circuit breaker are easy to accelerate aging due to continuous high temperature, and under the condition of determining the specification of the circuit breaker, the internal elements of the circuit breaker are difficult to adjust according to the requirements of the actual electric appliance, and the requirement of field work is difficult to be met.
Disclosure of Invention
In order to overcome the defects in the prior art, the application provides a short-circuit protection mechanism of a circuit breaker, which comprises a circuit breaking mechanism arranged in an insulating shell, wherein the circuit breaking mechanism comprises an armature positioned in a coil, a conductive plate is arranged at the lower end of the coil, a contact is arranged at the lower end of the conductive plate, and a safety mechanism is arranged in the insulating shell and close to the coil;
The safety mechanism comprises a top plate positioned at the upper end of the armature, a thimble is arranged at the lower end of the top plate and close to the armature, a connecting rod assembly is arranged at the lower end of the top plate and close to the edge of the coil, a driving assembly is sleeved outside the connecting rod assembly, a swinging part is arranged at the lower end of the connecting rod assembly, and the swinging part is connected with the contact;
The connecting rod assembly comprises a linkage gear, an upper connecting rod meshed with the linkage gear is arranged on one side of the linkage gear, the upper connecting rod is fixedly connected with the top plate, a lower connecting rod meshed with the linkage gear is arranged on the other side of the linkage gear, and the lower connecting rod is connected with the swinging part;
the driving assembly comprises a U-shaped frame positioned on the outer side of the linkage gear, a round groove for the linkage gear shaft to be inserted is formed in the inner side wall of the U-shaped frame, an electric push rod is arranged in the U-shaped frame, a processor is arranged at the upper end of the electric push rod, a monitoring module, a current controller and a temperature controller are arranged in the processor, and the current controller is in lap joint with the temperature controller and a coil circuit.
Further, the outside of going up the connecting rod is equipped with the stopper about last connecting rod symmetric distribution, the outside of connecting rod is equipped with the stopper about lower connecting rod symmetric distribution down, set up the rectangular channel that uses with the stopper cooperation on the inside wall of U type frame, the stopper slides in the rectangular channel.
Further, the swing part comprises a first bolt inserted into the lower end of the lower connecting rod, one end of the first bolt is provided with a swing rod, one end of the swing rod, far away from the first bolt, is provided with a second bolt, the center position of the swing rod is provided with a fixed ring, the fixed ring is fixedly connected with the insulating shell, the lower end face of the contact is provided with a jack at a position close to the second bolt, and the second bolt is inserted into the jack.
Further, the monitoring module is electrically connected with the electric push rod and used for controlling the electric push rod to start and stop, the advancing end of the electric push rod is fixedly connected with the upper connecting rod, and the electric push rod is used for pushing the upper connecting rod to displace.
Further, the current controller is arranged inside the U-shaped frame, one end of the current controller is electrically connected with the built-in monitoring module of the U-shaped frame, and the ammeter of the current controller is connected with the circuit in the coil in series.
Further, the temperature controller is arranged in the U-shaped frame, one end of the temperature controller is electrically connected with the built-in monitoring module of the U-shaped frame, and the probe of the temperature controller is overlapped with the outer side wall of the coil.
Further, a notch for inserting the lower connecting rod is formed in the position, close to the lower connecting rod, of the outer side of the upper connecting rod, and a notch for inserting the upper connecting rod is formed in the position, close to the upper connecting rod, of the outer side of the lower connecting rod.
The adjusting method based on the short-circuit protection mechanism of the circuit breaker comprises the following steps:
s1, setting a monitoring threshold, namely setting a current threshold of an internal circuit through a current controller according to electricity consumption requirements, and setting a temperature threshold at a coil through a temperature controller;
S2, circuit switching-on, namely when the circuit breaking mechanism of the circuit breaker is switched on, the advancing end of the electric push rod is positioned in the sleeve of the electric push rod, so that the contact is ensured to be in smooth contact with the conducting plate, the switching-on work of the circuit breaker is completed, and the normal path of current is ensured;
S3, breaking protection, namely when the monitoring module monitors that the current of the internal circuit reaches a set threshold value of the current controller or the surface temperature of the coil reaches a set threshold value of the temperature controller, transmitting the current to the monitoring module through an electric signal, and electrifying the electric push rod through the monitoring module;
S4, the contact is disconnected, namely the monitoring module controls the displacement of the advancing end of the electric push rod through an electric signal, so that the upper connecting rod is pushed to move downwards, the ejector pin impacts the armature, the armature is driven to move downwards, meanwhile, the linkage effect of the linkage gear is utilized to control the lower connecting rod to move upwards, the swing rod is driven to swing, one end, in contact with the conductive plate, of the contact is enabled to swing downwards, and the contact is disconnected from the conductive plate.
Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:
1. According to the application, the driving assembly and the connecting rod assembly are arranged on the outer side of the coil, the circuit current threshold value and the temperature threshold value are set through the processor, and the contact is disconnected with the conducting plate by utilizing the connecting rod assembly, so that when the circuit current of the electric appliance is overloaded and the magnetic field force of the coil is hard to push the armature, the internal circuit of the circuit breaker is disconnected in time, the circuit breaker is set according to the requirement of the electric appliance, the application range of the circuit breaker is enlarged, the safety of the electric appliance connected into the circuit breaker is effectively protected, and meanwhile, the service life of the internal element of the circuit breaker is prolonged;
2. According to the application, the connecting rod assembly is arranged, the synchronous reverse displacement of the upper connecting rod and the lower connecting rod is realized by utilizing the linkage gear, the armature is pushed to move by utilizing the downward pressing of the upper connecting rod, the swinging rod is pulled to swing by utilizing the upward moving of the lower connecting rod, and meanwhile, the contact part contacted with the conductive plate is pulled downward by utilizing the swinging of the swinging rod, so that the swinging amplitude of the swinging rod is large, the response speed of the lower connecting rod is high, the occupied space of the safety mechanism can be reduced, and the space in the insulating shell is effectively saved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic diagram of an interrupt mechanism according to an embodiment of the present application;
FIG. 3 is a schematic structural view of a protection mechanism according to an embodiment of the present application;
FIG. 4 is a schematic view of a connecting rod assembly according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a driving assembly according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a swing portion according to an embodiment of the present application;
FIG. 7 is a schematic view of a contact structure according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a processor according to an embodiment of the present application.
The device comprises a1, an insulating shell, a 2, a circuit breaking mechanism, a 21, a coil, a 22, an armature, a 23, a contact, a 24, a conducting plate, a 25, an arc extinguishing grid, a 3, a safety mechanism, a 31, a top plate, a 32, a thimble, a 33, a connecting rod assembly, a 331, an upper connecting rod, a 332, a lower connecting rod, 333, a linkage gear, a 4, a driving assembly, a 41, a U-shaped frame, a 42, a round groove, a 43, a rectangular groove, a 44, a limiting block, a 45, an electric push rod, a 46, a processor, a 5, a swinging part, a 51, a first bolt, a 52, a swinging rod, a 53, a second bolt, a 54, a jack, a 55 and a fixing ring.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to fig. 1-8 and specific embodiments of the present disclosure.
Referring to fig. 1 and2, the application discloses a short-circuit protection mechanism of a circuit breaker, which comprises an insulating shell 1, a circuit breaking mechanism 2 and a safety mechanism 3. The circuit breaking mechanism 2 is installed inside the insulating housing 1 and is used for controlling the closing and opening of the circuit breaker. The circuit breaking mechanism 2 comprises a coil 21, an armature 22, contacts 23, a conductive plate 24 and an arc chute 25. The coil 21 is fixedly mounted inside the insulating housing 1. The armature 22 is inserted inside the coil 21, and the armature 22 is displaced in the coil 21 in the axial direction of the coil 21. Contacts 23 with trip mechanisms are mounted inside the insulating housing 1 near the coils 21. The swinging of the contact 23 is controlled by a trip mechanism. The conductive plate 24 is fixedly installed inside the insulating housing 1 and near the coil 21, and a part of the structure of the conductive plate 24 is located below the coil 21, the contact 23 is in contact with the conductive plate 24, and the contact 23 and the conductive plate 24 are used for opening and closing the circuit. The arc chute 25 is installed inside the insulating housing 1 at a position close to the conductive plate 24, and a high voltage arc generated when the circuit is opened is eliminated by the arc chute 25. The safety mechanism 3 is mounted inside the insulating housing 1 near the coil 21. The safety mechanism 3 is used to assist the breaking mechanism 2 in breaking the contact 23 from the conductive plate 24.
During operation, the tripping mechanism is forced upwards, the spanner of the tripping mechanism is lifted upwards, the armature 22 in the coil 21 moves upwards, the contact 23 is in contact with the conducting plate 24, the internal circuit of the circuit breaker is completed, current is introduced from the upper end of the coil 21 and then is introduced from the lower end of the coil 21, the current passes through the conducting plate 24, and then is connected into the circuit at the lower end of the circuit breaker through the contact 23 overlapped with the conducting plate 24, so that the series connection of the circuit breaker and the electric circuit is realized, the connection of the electric circuit is realized, and meanwhile, the function of controlling the opening and closing of the electric circuit is endowed to the circuit breaker. When the internal circuit of the electrical appliance is short-circuited, the current of the internal circuit is multiplied, the internal current of the coil 21 is increased, so that the internal magnetic field force of the coil 21 is enhanced, the armature 22 is driven to move, the armature 22 downwards impacts the contact 23 and the tripping mechanism, the tripping mechanism drives the contact 23 to swing, the wrench of the tripping mechanism further swings downwards, the internal circuit of the circuit breaker is disconnected, and the internal circuit of the electrical appliance is protected. Meanwhile, the safety mechanism 3 is utilized to assist the circuit breaking structure, the safety mechanism 3 is utilized to trigger the circuit breaking mechanism 2 in advance when needed, the tripping mechanism of the circuit breaker works, and the contact 23 is disconnected with the conducting plate 24 in advance.
Referring to fig. 2 to 7, the safety mechanism 3 includes a top plate 31, a thimble 32, a link assembly 33, a driving assembly 4, and a swinging portion 5. The top plate 31 is fixedly installed in the insulating housing 1 and close to the armature 22, and the thimble 32 is fixedly installed on the lower end surface of the top plate 31 and close to the armature 22. The link assembly 33 is mounted on the lower end surface of the top plate 31 at a position close to the ejector pin 32. The link assembly 33 includes an upper link 331, a lower link 332, and a link gear 333. The upper connecting rod 331 is fixedly mounted on the lower end surface of the top plate 31 and is close to the thimble 32, and the upper end surface of the upper connecting rod 331 is fixedly connected with the top plate 31, and the upper connecting rod 331 is located beside the coil 21. The lower link 332 is installed at a position outside and near the lower end of the upper link 331. The link gear 333 is installed between the upper link 331 and the lower link 332, and the link gear 333 is engaged with the upper link 331 while the link gear 333 is engaged with the lower link 332. The lower end of the upper link 331 and a position close to the lower link 332 are provided with notches, and the upper end of the lower link 332 and a position close to the upper link 331 are provided with notches. The lower end of the upper link 331 can be spliced with the upper end of the lower link 332, reducing the occupation space of the link assembly 33. The driving assembly 4 is installed outside the linkage gear 333. The swinging portion 5 is installed inside the insulating housing 1 at a position close to the contact 23.
The driving assembly 4 comprises a U-shaped frame 41, a limiting block 44, an electric push rod 45 and a processor 46. The U-shaped frame 41 is fixedly installed inside the insulating housing 1 at a position close to the interlocking gear 333, and the interlocking gear 333 is installed inside the U-shaped frame 41 at a position close to the center. The inner side wall of the U-shaped frame 41 is provided with a circular groove 42 for the linkage gear 333 to be inserted in a rotating shaft, and the linkage gear 333 rotates in the circular groove 42 in the U-shaped frame 41. The stopper 44 is fixedly installed at a position outside the upper link 331 and close to the link gear 333, and similarly, the stopper 44 is installed at a position outside the lower link 332 and close to the link gear 333. The lower end of the upper link 331 is inserted into the U-shaped frame 41, and the upper end of the lower link 332 is inserted into the U-shaped frame 41. And a rectangular groove 43 is formed in the inner side wall of the U-shaped frame 41 and close to the limiting block 44, and the limiting block 44 slides in the rectangular groove 43. The upper link 331 and the lower link 332 are slidably connected to the rectangular groove 43 via the stopper 44 to realize displacement. When the upper link 331 is displaced, since the link gear 333 is simultaneously engaged with the upper link 331 and the lower link 332 on both sides, the lower link 332 is displaced in the opposite direction to the movement of the upper link 331 with the displacement of the upper link 331. The electric push rod 45 is fixedly installed inside the U-shaped frame 41, and the traveling end of the electric push rod 45 is fixedly connected with the lower end of the upper link 331. The displacement of the upper link 331 is controlled by the displacement of the traveling end of the electric push rod 45.
The swinging part 5 includes a first latch 51, a swing link 52, a second latch 53, and a fixing ring 55. The lower end of the lower connecting rod 332 is provided with a through hole, and the first bolt 51 is inserted into the through hole at the lower end of the lower connecting rod 332. The swing link 52 is fixedly arranged at one end of the first bolt 51, and the swing link 52 and the lower connecting rod 332 are not interfered with each other. The second latch 53 is fixedly mounted at an end of the swing link 52 remote from the first latch 51. The end of the contact 23 near the conductive plate 24 is provided with a jack 54, the second plug 53 is inserted into the jack 54 at one end of the contact 23, and the second plug 53 can rotate in the jack 54. The fixed ring 55 is fixedly arranged in the insulating shell 1 and is close to the center of the swing rod 52, and the fixed ring 55 is rotatably connected with the swing rod 52. And the swing rod 52 is arranged as a Z-shaped rod piece, so that the length of a connecting rod at the center of the swing rod 52 can be adjusted according to the installation requirement, the position of the swing rod 52 is close to the contact 23 but does not contact the contact 23, and the installation space of the swing rod 52 is reduced as much as possible.
After the circuit breaker is closed, the armature 22 is positioned inside the coil 21 near the upper end, the contact 23 is in contact with the conductive plate 24, and the traveling end of the electric push rod 45 is received in the sleeve of the electric push rod 45. When the contact 23 is required to be disconnected from the conductive plate 24, the electric push rod 45 is energized, so that the traveling end of the electric push rod 45 extends out, and the upper connecting rod 331 is driven to displace in the direction of the lower connecting rod 332. Since the linkage gear 333 is simultaneously engaged with the upper link 331 and the lower link 332, and the upper link 331 is located at one side of the linkage gear 333, the lower link 332 is located at the other side of the linkage gear 333, and when the upper link 331 moves in the direction of the lower link 332, the lower link 332 moves in the direction of the upper link 331 synchronously under the action of the linkage gear 333. Thus, the upper link 331 is displaced downward under the action of the electric push rod 45, and simultaneously carries the top plate 31 and the ejector pin 32 to displace toward the armature 22, and the ejector pin 32 pushes the armature 22 to displace downward, so that the armature 22 pushes the contact 23. While the upper link 331 is displaced downward, the lower link 332 is lifted upward by the linkage gear 333, the first pin 51 at one end of the swing link 52 is inserted into the through hole at the lower end of the lower link 332, and when the lower link 332 moves upward, one end of the swing link 52 connected with the lower link 332 swings upward, and at the same time, the other end of the swing link 52 swings downward. Because the end of the swing rod 52 that swings downward is connected to the contact 23 through the second latch 53, when the swing rod 52 swings, the contact 23 is driven to bend downward, so that the contact 23 is separated from contact with the conductive plate 24. After the contact 23 is disconnected from the conductive plate 24, the circuit breaker internal circuit will be in a broken state. And after the armature 22 moves downwards and impacts the contact 23, a tripping mechanism connected with the contact 23 acts in a linkage way, so that a spanner of the tripping mechanism rotates downwards, and the spanner of the tripping mechanism rebounds to a position before closing. When the circuit breaker is required to complete the circuit, the spanner of the tripping mechanism is required to be pulled to the closing position again, and the armature 22 is further moved to the upper side of the coil 21.
Referring to fig. 5 and 8, a processor 46 is fixedly installed at the upper end of the electric push rod 45, and the processor 46 is located inside the U-shaped frame 41. The processor 46 has a built-in monitoring module, current controller and temperature controller. The current controller is used for setting a current threshold value of the internal circuit of the coil 21, and is connected in series with the internal circuit of the coil 21. The temperature controller is used for setting a temperature threshold value on the surface of the coil 21, and the temperature controller is overlapped with the outer side wall of the coil 21.
It should be noted that the current controller is internally provided with a current meter, and the temperature controller is internally provided with a temperature meter. The ammeter is used for detecting the current of the circuit of the coil 21, and the thermometer is used for detecting the temperature of the outer side wall of the coil 21. When the ammeter detects that the current reaches the current threshold value set by the current controller, an electric signal is sent to the electric push rod 45 through the monitoring module, and the advancing end of the electric push rod 45 is controlled to extend. When the thermometer detects that the surface temperature of the coil 21 reaches the threshold value of the temperature controller, an electric signal is sent to the electric push rod 45 through the monitoring module, and the advancing end of the electric push rod 45 is controlled to extend.
Before the breaker is switched on, the breaker is set through a current controller and a temperature controller, a current threshold value and a temperature threshold value are set according to the requirements of an electric appliance, after the internal circuit of the breaker is switched on, a current meter is arranged in the current controller to detect the current of the coil 21, when the current of the coil 21 reaches the current threshold value set by the current controller, the current controller sends an electric signal to a monitoring module, the monitoring module controls an electric push rod 45 to start, the advancing end of the electric push rod 45 stretches out, the upper connecting rod 331 is driven to displace in the direction of the lower connecting rod 332, the upper connecting rod 331 drives the top plate 31 to move downwards, the ejector pin 32 at the lower end of the top plate 31 pushes the armature 22 to displace, the armature 22 pushes the contact 23, meanwhile, the lower connecting rod 332 displaces in the direction of the upper connecting rod 331 under the action of the linkage gear 333, the contact 23 is disconnected with the conductive plate 24, and the internal circuit of the breaker is cut off.
Similarly, when the temperature of the outer side wall of the coil 21 reaches the temperature threshold set by the temperature controller, the temperature controller sends an electric signal to the monitoring module, and then the monitoring module controls the electric push rod 45 to push the upper connecting rod 331 to displace, so that the contact 23 is disconnected with the conducting plate 24, and the internal circuit of the circuit breaker is cut off.
The method for adjusting the short-circuit protection mechanism of the circuit breaker comprises the following steps:
S1, setting a monitoring threshold, namely setting a current threshold of an internal circuit through a current controller according to electricity consumption requirements, and setting a temperature threshold at a coil 21 through a temperature controller;
s2, circuit switching-on, namely when the circuit breaker mechanism 2 is switched on, the advancing end of the electric push rod 45 is positioned in the sleeve of the electric push rod 45, so that the contact 23 is ensured to be in smooth contact with the conducting plate 24, the circuit breaker switching-on work is completed, and the normal current path is ensured;
S3, breaking protection, namely when the monitoring module monitors that the current of the internal circuit reaches a current controller set threshold value or the surface temperature of the coil 21 reaches a temperature controller set threshold value, transmitting the current to the monitoring module through an electric signal, and electrifying the electric push rod 45 through the monitoring module;
S4, the contact is disconnected, namely the monitoring module controls the displacement of the advancing end of the electric push rod 45 through an electric signal, so that the upper connecting rod 331 is pushed to move downwards, the ejector pin 32 impacts the armature 22 to drive the armature 22 to move downwards, meanwhile, the linkage effect of the linkage gear 333 is utilized to control the lower connecting rod 332 to move upwards, the swing rod 52 is driven to swing, the end, in contact with the conductive plate 24, of the contact 23 swings downwards, and the contact 23 is disconnected from the conductive plate 24.
The working principle of the embodiment of the application is as follows:
Before the breaker is closed, an internal circuit current threshold is set through a current controller, and a temperature threshold of the outer side wall of the coil 21 is set through a temperature controller. After the circuit breaker is switched on, the circuit path of the electric appliance is normal, when the current meter in the current controller detects that the current at the coil 21 reaches the set current threshold value, the electric push rod 45 is controlled to move through the monitoring module, the electric push rod 45 is utilized to push the upper connecting rod 331 to displace towards the lower connecting rod 332, meanwhile, the linkage gear 333 drives the lower connecting rod 332 to displace towards the upper connecting rod 331, and then one end of the swing rod 52 with the first bolt 51 is lifted, one end of the swing rod 52 with the second bolt 53 swings downwards, the part, which is in contact with the conducting plate 24, of the traction contact 23 bends downwards, and the contact 23 is disconnected with the conducting plate 24, so that the circuit breaker internal circuit is broken.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411301480.5A CN118942970B (en) | 2024-09-18 | 2024-09-18 | Short-circuit protection mechanism of circuit breaker and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411301480.5A CN118942970B (en) | 2024-09-18 | 2024-09-18 | Short-circuit protection mechanism of circuit breaker and adjusting method thereof |
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| CN118942970B true CN118942970B (en) | 2025-04-22 |
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| CN120453135B (en) * | 2025-05-07 | 2026-01-02 | 北京华电美仪电气科技有限公司 | Operating mechanism of circuit breaker accessory and circuit breaker system |
| CN120637173B (en) * | 2025-06-12 | 2026-01-23 | 深圳市智电神盾科技有限公司 | A circuit breaker device and method with fire protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207367828U (en) * | 2017-08-23 | 2018-05-15 | 河北宝凯电气股份有限公司 | A kind of high-breaking miniature breaker |
| CN113506712A (en) * | 2021-06-29 | 2021-10-15 | 浙江百事宝电器股份有限公司 | Quick action mechanism of hydraulic electromagnetic type circuit breaker and circuit breaker with quick action mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7298236B2 (en) * | 2005-04-27 | 2007-11-20 | Jingzheng Chen | Circuit breaker electromagnetic tripping device |
| CN215896286U (en) * | 2021-06-29 | 2022-02-22 | 浙江百事宝电器股份有限公司 | Quick action mechanism of hydraulic electromagnetic circuit breaker and circuit breaker with same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207367828U (en) * | 2017-08-23 | 2018-05-15 | 河北宝凯电气股份有限公司 | A kind of high-breaking miniature breaker |
| CN113506712A (en) * | 2021-06-29 | 2021-10-15 | 浙江百事宝电器股份有限公司 | Quick action mechanism of hydraulic electromagnetic type circuit breaker and circuit breaker with quick action mechanism |
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