Single-pole small intelligent circuit breaker and circuit breaking method

Abstract

The invention provides a single-pole small intelligent circuit breaker and a circuit breaking method, and the circuit breaker comprises a housing which comprises a pedestal, a pedestal, and a cover plate. A terminal group, an electromagnetic tripping mechanism, a circuit breaker free tripping mechanism, an on-off mechanism, an arc extinguishing mechanism and a signal processing circuit unit are arranged in the shell; the terminal group comprises an inlet wiring terminal and an outlet wiring terminal, the electromagnetic tripping mechanism comprises a magnet yoke, a tripper, a coil, a static contact and a static contact, the on-off mechanism comprises a motor, a worm, a worm gear, a transmission wheel, a main cam, a fan wheel and a tripping push rod, and the arc extinguishing mechanism is used for segmenting an electric arc. And the signal processing circuit unit is used for controlling the closing and opening mechanism to act. The monopole small intelligent circuit breaker is small in parts, ingenious in design and very convenient to install and use, can provide all-around protection and monitoring for voltage, current, temperature and the like, and also supports remote automatic closing and opening of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a single-pole small intelligent circuit breaker and a circuit breaking method. Background Art

[0002] Miniature circuit breakers are mainly used in various places such as industry, commerce, high-rise and residential buildings. They are used for overload and short-circuit protection of lighting, distribution lines and equipment in office buildings, residential buildings and similar buildings. They can also be used for infrequent on-off operation and conversion of lines. However, traditional miniature circuit breakers are powerless when overvoltage, undervoltage and overtemperature occur during use, which brings safety hazards to the power system.

[0003] As my country's power supply network gradually becomes intelligent, the State Grid Corporation of China has higher and higher requirements for power supply equipment. Among the existing power supply network terminals, traditional circuit breakers are still the most widely used, especially single-pole circuit breakers. Some smart grid terminals also use smart circuit breakers. Smart circuit breakers are generally assembled and combined with a remote control unit and a circuit breaker execution unit that occupies a switch position to realize real-time monitoring of power consumption, collect power consumption information, protect power line equipment, and perform intelligent functions such as opening and closing operations on circuit breakers. Therefore, they are relatively large in size, complex in structure, and high in cost. Summary of the invention

[0004] The object of the present invention is to provide a single-pole small intelligent circuit breaker and a circuit breaking method, which are used to solve the problem that the prior art cannot provide multi-faceted protection for abnormal states of the circuit breaker.

[0005] In a first aspect, the present application provides a single-pole small intelligent circuit breaker, comprising:

[0006] A shell, the shell comprising a base, a pedestal and a cover plate, wherein the pedestal is arranged between the base and the cover plate;

[0007] The housing is provided with a terminal group, an electromagnetic tripping mechanism, a circuit breaker free tripping mechanism, a closing and opening mechanism, an arc extinguishing mechanism and a signal processing circuit unit; wherein,

[0008] The terminal group includes an input terminal and an output terminal, the electromagnetic tripping mechanism includes a yoke, a release, a coil, a static contact and a static contact point, the closing and opening mechanism includes a motor, a worm, a worm gear, a transmission wheel, a main cam, a fan wheel and a tripping push rod, the arc extinguishing mechanism is used to split the arc, and the signal processing circuit unit is used to collect signals for processing and control the closing and opening mechanism to operate.

[0009] In a possible implementation of the present application, the input terminal includes an input terminal frame, an input terminal screw and an input terminal plate, and the input terminal frame is slidably connected to the input terminal plate; the output terminal includes an output terminal frame, an output terminal screw and an output terminal plate, and the output terminal frame is slidably connected to the output terminal plate.

[0010] In a possible implementation of the present application, the yoke is fixedly connected to the static contact, the end of the static contact away from the yoke is fixedly connected to the coil, the end of the coil away from the static contact is connected to the terminal board, the release is provided in the inner hole of the coil, and the static contact point is fixedly welded on the static contact.

[0011] In a possible implementation of the present application, the circuit breaker free tripping mechanism includes a handle, a tripping catch, a lock catch, a moving contact, a tripping piece, a tripping rod, a tripping catch reset spring and a U-shaped shaft, wherein a first circular hole is provided on the handle, the tripping catch is inserted into the first circular hole and is rotatably connected to the handle, one end of the tripping catch is fixedly connected to the reset spring, and the other end is placed in the U-shaped groove of the lock catch, the lock catch is hinged to the moving contact and is fixed in the housing through the U-shaped shaft, the U-shaped shaft and the lock catch are connected by the tripping catch reset spring, the tripping piece is provided between the moving contact and the static contact, the moving contact is connected to a thermal element, the thermal element is provided with a V-shaped angle, the V-shaped angle is used to limit the tripping rod, one end of the tripping piece is provided with a limiting hole, one side of the tripping rod is located in the V-shaped angle, and the other side is located in the limiting hole.

[0012] In a possible implementation of the present application, the handle is fixed by the base and the pedestal, and an operating portion is provided on the handle, and the operating portion passes through the shell and extends outward.

[0013] In a possible implementation of the present application, the arc extinguishing mechanism includes an arc striking plate, an arc extinguishing cover, an arc isolation plate, a magnetic conductive plate, an arc baffle plate and an arc spraying port, the magnetic conductive plate is provided below the arc isolation plate, the arc striking plate is provided on one side of the arc isolation plate, the arc extinguishing cover is provided on the other side of the arc isolation plate, the arc baffle plate is provided at the tail of the arc extinguishing cover, and the arc spraying port is provided on the base.

[0014] In a possible implementation of the present application, when the motor rotates, the worm gear located on the motor shaft drives the worm wheel to rotate, the worm wheel drives the transmission wheel and the main cam to rotate, the main cam drives the fan wheel to rotate and drives the release push rod to move, the fan wheel is connected to the handle, and the release push rod is connected to the release part.

[0015] In a possible implementation of the present application, a hexagonal hole is provided on the handle, and the impeller is connected to the handle through the hexagonal hole.

[0016] In a possible implementation of the present application, the signal processing unit includes a power supply module, a current acquisition module, a voltage acquisition module, a temperature acquisition processing module, a motor drive module, a storage module and an external interface.

[0017] In a second aspect, the present application provides a single-pole small intelligent circuit breaker circuit breaking method, which is applied to any of the single-pole small intelligent circuit breakers described above, and the method comprises the following steps:

[0018] Acquire target parameters in the circuit breaker circuit, wherein the target parameters include at least current parameters, voltage parameters and temperature parameters;

[0019] A judgment is made based on the target parameters and the corresponding target thresholds, wherein if one of the target parameters exceeds the corresponding target threshold, a preset closing and opening mechanism is controlled to perform an action to open the circuit breaker.

[0020] As described above, the single-pole small intelligent circuit breaker of the present invention has small parts, ingenious design, and is very easy to install and use. In addition, the single-pole small intelligent circuit breaker breaking method of the present invention can provide all-round protection and monitoring of voltage, current, temperature, etc., and also supports remote automatic closing and opening of circuit breakers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a structural schematic diagram of a single-pole small intelligent circuit breaker in one embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the housing structure of a single-pole small intelligent circuit breaker in one embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram showing the structure of the closing and opening mechanism of a single-pole small intelligent circuit breaker in one embodiment of the present invention;

[0024] Figure 4 Shown is a schematic diagram of the structure of a signal processing unit of a single-pole small intelligent circuit breaker in one embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram showing the method steps of a single-pole small intelligent circuit breaker circuit breaking method in one embodiment of the present invention.

[0026] Component number description

[0027] Steps S502 to S504

[0028] 1 Housing

[0029] 11. Base

[0030] 12 Base

[0031] 12A Base side

[0032] 12B Base side

[0033] 13 Cover

[0034] 2-in terminal block

[0035] 21 Enter the wiring frame

[0036] 22 Terminal screws

[0037] 23 Inlet terminal block

[0038] 3 Electromagnetic tripping mechanism

[0039] 31 Yoke

[0040] 32 Trip Unit

[0041] 321 Moving iron core

[0042] 33 Coil

[0043] 34 Stationary contact

[0044] 35 static contact

[0045] 4 Circuit breaker free tripping mechanism

[0046] 41 Contact indicator

[0047] 42 Handle

[0048] 421 Operation Department

[0049] 422 Hexagonal Hole

[0050] 423 First Hole

[0051] 43 Lock

[0052] 431 U-shaped groove

[0053] 44 Jump Dunk

[0054] 45 Jumper return spring

[0055] 46 Release parts

[0056] 461 Limit hole

[0057] 47 U-Shaped Shaft

[0058] 48 Moving contact return spring

[0059] 49 Moving contact

[0060] 491 Second Hole

[0061] 5 Trip lever

[0062] 6-outlet terminal block

[0063] 61 Outlet wiring frame

[0064] 62 Terminal screw

[0065] 63 Outlet terminal block

[0066] 7 Thermal element

[0067] 71 V-angle

[0068] 8 Arc extinguishing mechanism

[0069] 81 Arc starter plate

[0070] 82 Arc extinguishing hood

[0071] 83 Arc isolation plate

[0072] 84 Magnetic plate

[0073] 85 Arc baffle

[0074] 86 Arc Spray

[0075] 9 Signal Processing Unit

[0076] 91 Power Module

[0077] 911 Power Cord

[0078] 92 Current acquisition module

[0079] 921 Current Collector

[0080] 93 Voltage acquisition module

[0081] 94 Temperature acquisition and processing module

[0082] 941 Temperature Sensor

[0083] 95 Motor drive module

[0084] 96 Storage Module

[0085] 97 External Interface

[0086] 10. Merger and separation mechanism

[0087] 101 Motor

[0088] 102 Worm

[0089] 103 Worm gear

[0090] 104 Transmission wheel

[0091] 105 Main Cam

[0092] 106 Fan wheel

[0093] 107 Trip push rod DETAILED DESCRIPTION

[0094] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0095] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0096] See also Figure 1 In one embodiment of the invention, the single-pole small intelligent circuit breaker of the present invention comprises:

[0097] A shell, the shell comprising a base, a pedestal and a cover plate, wherein the pedestal is arranged between the base and the cover plate;

[0098] The housing is provided with a terminal group, an electromagnetic tripping mechanism, a circuit breaker free tripping mechanism, a closing and opening mechanism, an arc extinguishing mechanism and a signal processing circuit unit; wherein,

[0099] The terminal group includes an input terminal and an output terminal, the electromagnetic tripping mechanism includes a yoke, a release, a coil, a static contact and a static contact point, the closing and opening mechanism includes a motor, a worm, a worm gear, a transmission wheel, a main cam, a fan wheel and a tripping push rod, the arc extinguishing mechanism is used to split the arc, and the signal processing circuit unit is used to collect signals for processing and control the closing and opening mechanism to operate.

[0100] It should be noted that if Figure 2As shown, the housing 1 includes a base 11, a base 12 and a cover plate 13, the base 12 is arranged between the base 11 and the cover plate 13, in this embodiment, in order to better describe the structural layout, a base side 12A and a base side 12B are arranged on both sides of the base 12, wherein the incoming terminal 2 is arranged between the base 11 and the base side 12A, the base side 12B is used to illustrate the closing and opening mechanism, and the incoming terminal 2 includes an incoming wiring frame 21, an incoming wiring screw 22 and an incoming wiring board 23, the incoming wiring frame 21 and the incoming wiring board 2 3 sliding connection, specifically, by rotating the inlet wiring screw 22, the inlet wiring frame 21 can slide up and down in the inlet wiring board 23, so that you can adjust the size of the inlet wiring hole to connect wires of different sizes as needed; the outlet wiring terminal 6 includes an outlet wiring frame 61, an outlet wiring screw 62 and an outlet wiring board 63, and the outlet wiring frame 61 is slidably connected to the outlet wiring board 63. Specifically, by rotating the outlet wiring screw 62, the outlet wiring frame 61 can slide up and down in the outlet wiring board 63, so that you can adjust the size of the outlet wiring hole to connect wires of different sizes as needed.

[0101] Further, the electromagnetic tripping mechanism 3 includes the yoke 31, the release 32, the coil 33, and the static contact 34 and the static contact 35, wherein the yoke 31 is fixedly connected to the static contact 34, the end of the static contact 34 away from the yoke 31 is fixedly connected to the coil 33, the end of the coil 33 away from the static contact 34 is connected to the inlet terminal block 23, the release 32 is provided in the inner hole of the coil 33, the static contact 34 is fixedly welded with the static contact 35, and specifically, one side end surface of the yoke 31 is connected to the static contact The head 34 is welded, and accordingly, one end of the static contact 34 away from the yoke 31 is welded to the coil 33, and the other end of the coil 33 is welded to the incoming terminal board 23, and they are connected together through a conductive wire. The inner hole of the coil 33 is provided with the releaser 32, and one end of the moving iron core 321 in the releaser 32 is provided at the incoming terminal, and the other end is provided at the static contact end. A power line 911 is welded on the incoming terminal board 23, and the other end of the power line is connected to the signal processing unit, so as to draw power during operation. A static contact 35 is also welded on the static contact 34 for switching current on and off.

[0102] Further, in one embodiment of the invention, the circuit breaker free tripping mechanism includes a handle, a tripping catch, a lock catch, a moving contact, a tripping piece, a tripping rod, a tripping catch reset spring and a U-shaped shaft, wherein the handle is provided with a first circular hole, the tripping catch is inserted into the first circular hole and is rotatably connected to the handle, one end of the tripping catch is fixedly connected to the reset spring, and the other end is placed in the U-shaped groove of the lock catch, the lock catch is hinged to the moving contact and is fixed in the housing through the U-shaped shaft, the U-shaped shaft and the lock catch are connected by the tripping catch reset spring, the tripping piece is provided between the moving contact and the static contact, the moving contact is connected to a thermal element, the thermal element is provided with a V-shaped angle, the V-shaped angle is used to limit the tripping rod, one end of the tripping piece is provided with a limiting hole, one side of the tripping rod is located in the V-shaped angle, and the other side is located in the limiting hole.

[0103] It should be noted that the circuit breaker free tripping mechanism 4 includes a handle 42, a tripping buckle 44, a lock buckle 43, a moving contact 49, a tripping member 46, a tripping rod 5, a tripping buckle reset spring 45, a U-shaped shaft 47, a moving contact reset spring 48 and a contact indicator 41, wherein the handle 42 is fixed by the base 11 and the base 12 in the housing 1, and an operating portion 421 is provided on the handle 42, and the operating portion 421 penetrates the housing 1 and extends outward, so as to facilitate manual operation by the user, and a first circular hole 423 is provided on the handle 42, and the tripping buckle 44 is inserted into the first circular hole 423 to realize a rotational connection with the handle 42, one end of the tripping buckle 44 is fixedly connected to the tripping buckle reset spring 45 in the housing 1, and the other end is arranged in the U-shaped groove 431 of the lock buckle 43, and the lock buckle 43 is hinged to the moving contact 49 through a rivet shaft, and is fixed in the housing 1 by the U-shaped shaft 47, and the U-shaped The shaft 47 is connected to the lock catch 43 by the tripping reset spring 45. The tripping member 46 is provided between the moving contact 49 and the static contact 34. The tripping member 46 is provided with the limiting hole 461. When the tripping member 46 rotates, the tripping member 44 is driven to slide out of the U-shaped groove 431 of the lock catch 43. The moving contact 49 is connected with a thermal element 7 through a soft copper wire. The thermal element 7 is fixedly welded by the outlet terminal board 61 and the arc-starting plate 81. It is a metal material composed of two or three layers of different heating coefficients. A V-shaped angle 71 is provided on the thermal element 7. The V-shaped angle 71 is used to limit the tripping rod 5. One end of the tripping rod 5 is located in the V-shaped angle 71, and the other end is located in the limiting hole 461. In this way, when the thermal element 7 is heated to a certain bending amount in the closed state, it can drive the tripping member 46 to rotate through the tripping rod 5, so that the free tripping mechanism of the circuit breaker is tripped and disconnected. In addition, a second circular hole 491 is provided on the upper portion of the moving contact 49, which is linked to the contact indicator 41 fixed in the housing 1 by a transmission shaft. When the moving contact 49 is opened or closed, the contact indicator 41 is driven to rotate to indicate the corresponding contact state. The moving contact reset spring 48 is used to reset the moving contact 49.

[0104] Furthermore, in one embodiment of the invention, the arc extinguishing mechanism includes an arc striking plate, an arc extinguishing cover, an arc isolation plate, a magnetic conductive plate, an arc blocking plate and an arc spraying port, the magnetic conductive plate is provided under the arc isolation plate, the arc striking plate is provided on one side of the arc isolation plate, the arc extinguishing cover is provided on the other side of the arc isolation plate, the arc blocking plate is provided at the tail of the arc extinguishing cover, and the arc spraying port is provided on the base.

[0105] It should be noted that the arc extinguishing mechanism 8 is composed of an arc-striking plate 81, an arc-extinguishing cover 82, an arc-isolating plate 83, a magnetic plate 84, an arc-blocking plate 85 and an arc-spraying port 86, wherein the moving contact 49 and the static contact 34 are each provided with an arc-isolating plate 83 above and below, the magnetic plate 84 is below the arc-isolating plate 83, the arc-striking plate 81 is provided on one side of the arc-isolating plate 83, and the arc-extinguishing cover 82 is provided on the other side, the arc-extinguishing cover 82 is composed of "12" evenly distributed metal arc-extinguishing plates, which are used to divide the arc, and the tail of the arc-extinguishing cover 82 is provided with a mesh arc-blocking plate 85, and the arc-spraying port 86 is provided on the base 12.

[0106] Furthermore, in one embodiment of the invention, when the motor rotates, the worm gear located on the motor shaft drives the worm wheel to rotate, the worm wheel drives the transmission wheel and the main cam to rotate, the main cam drives the fan wheel to rotate and drives the release push rod to move, the fan wheel is connected to the handle, and the release push rod is connected to the release part.

[0107] It should be noted that if Figure 3 As shown, on the side of the base side 12B, the closing and opening mechanism 10 includes a motor 101, a worm 102, a worm wheel 103, a transmission wheel 104, a main cam 105, a fan wheel 106 and a trip push rod 107, wherein when the motor rotates, the worm 102 located on the motor shaft drives the worm wheel 103 to rotate, the worm wheel 103 drives the transmission wheel 104 and the main cam 105 to rotate, and the main cam 105 simultaneously drives the fan wheel 106 to rotate and drives the trip push rod 107 to move, the fan wheel 106 is connected to the handle 42 in the circuit breaker free tripping mechanism 4, so that the handle 42 can be closed and opened, and the trip push rod 7 is connected to the tripping member 46, so that in the closed state, the closing and opening mechanism 10 can open the current intelligent circuit breaker when it is actuated.

[0108] Furthermore, in one embodiment of the invention, a hexagonal hole is provided on the handle, and the impeller is connected to the handle through the hexagonal hole.

[0109] It should be noted that, in the above embodiment, it is described that the impeller 106 is connected to the handle 42 , while in this embodiment, it is described that the handle 42 is provided with the hexagonal hole 422 , which means that the impeller 106 is connected to the handle 42 via the hexagonal hole 422 .

[0110] Furthermore, in one embodiment of the invention, the signal processing unit includes a power supply module, a current acquisition module, a voltage acquisition module, a temperature acquisition processing module, a motor drive module, a storage module and an external interface.

[0111] It should be noted that the reference Figure 4 The signal processing unit 9 includes a power supply module 91, a current acquisition module 92, a voltage acquisition module 93, a temperature acquisition processing module 94, a motor drive module 95, a storage module 96 and an external interface 97, and the signal processing circuit unit 9 is used to collect signals for processing and control the closing and opening mechanism 10 to operate. Specifically, the output wiring board 61 passes through the center hole of the current collector 921 and is connected to the output wiring terminal 6. The output end of the current collector 921 is connected to the current acquisition module 92 of the signal processing unit 9. A temperature sensor 941 is arranged on the side of the arc starting plate 81 and is connected to the temperature acquisition processing module 94 to collect the temperature.

[0112] See also Figure 5 In one embodiment, a circuit breaking method for a single-pole small intelligent circuit breaker provided in this embodiment is applied to the single-pole small intelligent circuit breaker, and the method comprises the following steps:

[0113] Step S502, obtaining target parameters in the circuit breaker circuit, wherein the target parameters at least include current parameters, voltage parameters and temperature parameters;

[0114] Step S504, making a judgment based on the target parameters and the corresponding target thresholds, wherein if one of the target parameters exceeds the corresponding target threshold, controlling the preset closing and opening mechanism to perform an action to open the circuit breaker.

[0115] It should be noted that, in this embodiment, the target parameters in the circuit breaker circuit are obtained based on the signal processing unit in the single-pole small intelligent circuit breaker, wherein the obtained target parameters include current parameters, voltage parameters and temperature parameters, so that judgment is made based on the target parameters and the corresponding target thresholds, so that when any of the target parameters exceeds the corresponding target threshold, the preset closing and opening mechanism is controlled to perform an action to open the circuit breaker. Specifically, in actual application, the current parameter is obtained based on the current collector, the voltage parameter is obtained based on the voltage collector, and the temperature parameter is obtained based on the temperature sensor. When the threshold is judged, each parameter corresponds to a different target threshold. Taking temperature as an example, when the obtained temperature parameter exceeds the corresponding temperature threshold, the signal processing unit will output a closing and opening instruction to enable the corresponding closing and opening mechanism to act so that the circuit breaker can be opened in the original state of closing.

[0116] In summary, the single-pole small intelligent circuit breaker of the present invention has small parts, ingenious design, and is very easy to install and use. The single-pole small intelligent circuit breaker breaking method of the present invention can provide all-round protection and monitoring of voltage, current, temperature, etc., and also supports remote automatic closing and opening of circuit breakers.

[0117] Those of ordinary skill in the art should further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0118] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0119] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A single-pole small intelligent circuit breaker, characterized in that: include: A shell, the shell comprising a base, a pedestal and a cover plate, wherein the pedestal is arranged between the base and the cover plate; The housing is provided with a terminal group, an electromagnetic tripping mechanism, a circuit breaker free tripping mechanism, a closing and opening mechanism, an arc extinguishing mechanism and a signal processing circuit unit; wherein, The terminal group includes an input terminal and an output terminal, the electromagnetic tripping mechanism includes a yoke, a release, a coil, a static contact and a static contact point, the closing and opening mechanism includes a motor, a worm, a worm gear, a transmission wheel, a main cam, a fan wheel and a tripping push rod, the arc extinguishing mechanism is used to split the arc, and the signal processing circuit unit is used to collect signals for processing and control the closing and opening mechanism to operate.

2. The single-pole small intelligent circuit breaker according to claim 1, characterized in that: The input terminal includes an input wiring frame, an input wiring screw and an input wiring board, and the input wiring frame is slidably connected to the input wiring board; the output terminal includes an output wiring frame, an output wiring screw and an output wiring board, and the output wiring frame is slidably connected to the output wiring board.

3. The single-pole small intelligent circuit breaker according to claim 1, characterized in that: The yoke is fixedly connected to the static contact, the end of the static contact away from the yoke is fixedly connected to the coil, the end of the coil away from the static contact is connected to the input terminal board, the release is provided in the inner hole of the coil, and the static contact point is fixedly welded on the static contact.

4. The single-pole small intelligent circuit breaker according to claim 1, characterized in that: The circuit breaker free tripping mechanism comprises a handle, a tripping catch, a lock catch, a moving contact, a tripping piece, a tripping rod, a tripping catch reset spring and a U-shaped shaft, wherein the handle is provided with a first circular hole, the tripping catch is inserted into the first circular hole and is rotatably connected to the handle, one end of the tripping catch is fixedly connected to the reset spring, and the other end is placed in the U-shaped groove of the lock catch, the lock catch is hinged to the moving contact and is fixed in the housing through the U-shaped shaft, the U-shaped shaft and the lock catch are connected by the tripping catch reset spring, the tripping piece is provided between the moving contact and the static contact, the moving contact is connected with a thermal element, the thermal element is provided with a V-shaped angle, the V-shaped angle is used to limit the tripping rod, one end of the tripping piece is provided with a limiting hole, one side of the tripping rod is located in the V-shaped angle, and the other side is located in the limiting hole.

5. The single-pole small intelligent circuit breaker according to claim 4, characterized in that: The handle is fixed by the base and the pedestal, and an operating portion is provided on the handle. The operating portion penetrates the shell and extends outward.

6. The single-pole small intelligent circuit breaker according to claim 4, characterized in that: The arc extinguishing mechanism includes an arc striking plate, an arc extinguishing cover, an arc isolation plate, a magnetic conductive plate, an arc blocking plate and an arc spraying port. The magnetic conductive plate is provided below the arc isolation plate, the arc striking plate is provided on one side of the arc isolation plate, the arc extinguishing cover is provided on the other side of the arc isolation plate, the arc blocking plate is provided at the tail of the arc extinguishing cover, and the arc spraying port is provided on the base.

7. The single-pole small intelligent circuit breaker according to claim 4, characterized in that: When the motor rotates, the worm on the motor shaft drives the worm wheel to rotate, the worm wheel drives the transmission wheel and the main cam to rotate, the main cam drives the fan wheel to rotate and drives the release push rod to move, the fan wheel is connected to the handle, and the release push rod is connected to the release part.

8. The single-pole small intelligent circuit breaker according to claim 7, characterized in that: The handle is provided with a hexagonal hole, and the fan wheel is connected to the handle through the hexagonal hole.

9. The single-pole small intelligent circuit breaker according to claim 1, characterized in that: The signal processing unit includes a power supply module, a current acquisition module, a voltage acquisition module, a temperature acquisition processing module, a motor drive module, a storage module and an external interface.

10. A single-pole small intelligent circuit breaker circuit breaking method, characterized in that: Applied to the single-pole small intelligent circuit breaker according to any one of claims 1 to 9, the method comprises the following steps: Acquire target parameters in the circuit breaker circuit, wherein the target parameters include at least current parameters, voltage parameters and temperature parameters; A judgment is made based on the target parameters and the corresponding target thresholds, wherein if one of the target parameters exceeds the corresponding target threshold, a preset closing and opening mechanism is controlled to perform an action to open the circuit breaker.

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