Automatic closing module for circuit breakers

Abstract

An automatic closing module for a circuit breaker comprises an auxiliary housing and an auxiliary handle, a control panel and a driving mechanism respectively installed in the auxiliary housing, wherein the auxiliary handle is used for linkage connection with an operating handle of a circuit breaker unit, an opening state monitoring mechanism cooperating with the auxiliary handle is arranged in the auxiliary housing, a control unit is arranged on the control panel, the opening state monitoring mechanism and the driving mechanism are respectively connected with the control unit of the control panel, when the circuit breaker unit trips, the auxiliary handle is driven by the operating handle to trigger the opening state monitoring mechanism, after receiving the circuit breaker opening signal transmitted by the opening state monitoring mechanism, the control unit controls the driving mechanism to push the auxiliary handle to drive the operating handle to close the circuit breaker unit, and automatically closes the circuit breaker unit after the temporary fault of the line is relieved, so as to timely restore the power supply of the power system and ensure the reliability of the power supply of the power system.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to an automatic closing module of a circuit breaker. Background Art

[0002] Circuit breakers are an important part of the electrical industry. When the circuit is working normally, the circuit breaker can close and open the circuit. When the circuit fails, the circuit breaker can automatically cut off the circuit to avoid endangering the safety of workers and the normal operation of equipment due to circuit failure. According to the needs of my country's power grid intelligence, circuit breakers are required to have remote control functions in some workplaces. Therefore, small circuit breakers or residual current circuit breakers (RCBO, RCCB) with automatic closing functions have come into being. The electric operation module is used in combination with the circuit breaker unit. After the line fault is eliminated, the electric operation module can be used to drive the circuit breaker to reclose and other remote control functions.

[0003] Although the existing auxiliary modules can close the circuit breaker remotely, they need to be closed manually after the line fault is eliminated, and the circuit breaker cannot be closed automatically. Line faults such as lightning strikes and wind damage are temporary in most cases. After the circuit breaker trips, the insulation performance of the line (insulators and air gaps) can be quickly restored. If the circuit breaker cannot be closed automatically after the line is restored, it needs to be closed remotely under manual operation, which will affect the reliability of the power supply of the power system. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide an automatic closing module for a circuit breaker with simple structure and high reliability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic closing module for a circuit breaker comprises an auxiliary housing and an auxiliary handle, a control panel and a driving mechanism respectively installed in the auxiliary housing, wherein the auxiliary handle is used for linkage connection with an operating handle of a circuit breaker unit, an opening state monitoring mechanism cooperating with the auxiliary handle is arranged in the auxiliary housing, a control unit is arranged on the control panel, the opening state monitoring mechanism and the driving mechanism are respectively connected with the control unit of the control panel, when the circuit breaker unit trips, the auxiliary handle is driven by the operating handle to trigger the opening state monitoring mechanism, and after receiving the circuit breaker opening signal transmitted by the opening state monitoring mechanism, the control unit controls the driving mechanism to push the auxiliary handle to drive the operating handle to close the circuit breaker unit.

[0007] Preferably, the automatic closing module is also provided with a mode conversion mechanism, which is connected to the control unit of the control panel and is used to set the automatic closing module to manual mode or automatic mode. If the mode conversion mechanism is set to manual mode, the control unit will not automatically control the driving mechanism to close the circuit breaker unit; if the mode conversion mechanism is set to automatic mode, the opening state monitoring mechanism detects that the circuit breaker is in the opening state, and after a certain delay time t1, the control unit automatically controls the driving mechanism to push the auxiliary handle to drive the operating handle to close the circuit breaker unit.

[0008] Preferably, the mode conversion mechanism of the automatic closing module is in automatic mode and is also provided with a self-locking state. The control unit enters a self-locking state within a certain fault monitoring time t2 when it detects through the opening state monitoring mechanism that the circuit breaker switches from the closing state to the opening state m times, and no longer automatically closes the circuit breaker unit. The m is greater than 1.

[0009] Preferably, when the automatic closing module enters the self-locking state, the control unit monitors through the opening state monitoring mechanism that the circuit breaker switches from the opening state to the closing state, and after the closing state lasts for at least a certain self-locking recovery time t3, the automatic closing module releases the self-locking state.

[0010] Preferably, the control unit stores each opening time record after detecting that the circuit breaker switches from the closed state to the open state through the opening state monitoring mechanism each time;

[0011] The control unit obtains the state of the mode conversion mechanism, and if it is in manual mode, the closing operation is not automatically performed;

[0012] If it is in automatic mode, the most recent m opening time records are read, and the time difference between the most recent first opening time and the most recent mth opening time is compared with the fault monitoring time t2. If the opening time difference is greater than or equal to the fault monitoring time t2, the control unit waits for the delay time t1, and the automatic control drive mechanism pushes the auxiliary handle to drive the operating handle to close the circuit breaker unit. If the opening time difference is less than the fault monitoring time t2, it enters the self-locking state and no longer automatically closes the circuit breaker unit.

[0013] Preferably, the auxiliary handle includes a pivot portion and a driving portion and a linkage portion respectively arranged at both ends of the pivot portion, the linkage portion is connected to the operating handle of the circuit breaker unit through a linkage member, the top end of the driving portion is connected to the pivot portion, the bottom end of the driving portion cooperates with the opening state monitoring mechanism, and the side surface of the driving portion cooperates with the driving mechanism.

[0014] Preferably, the opening state monitoring mechanism is a micro switch installed on the control panel, and the top of the micro switch is provided with a lever extending to the rotation path of the driving part; or, the opening state monitoring mechanism includes a circuit board vertically connected to the control panel, and a micro switch installed on the side of the circuit board, the end faces of the circuit board and the bottom end of the driving part are arranged opposite to each other, and the micro switch is arranged between the circuit board and the end faces of the bottom end of the driving part.

[0015] Preferably, the driving mechanism includes a motor connected to the control unit of the control panel, a screw connected to the motor, a first gear meshing with the screw, a second gear meshing with the first gear, a third gear meshing with the second gear, and a connecting rod hinged at an eccentric point with the third gear, and the auxiliary handle is pushed by the connecting rod to drive the operating handle to close the circuit breaker unit.

[0016] Preferably, an initial position detection mechanism and a closing position detection mechanism respectively cooperating with the third gear are provided around the third gear, the initial position detection mechanism and the closing position detection mechanism are respectively connected to the control unit of the control panel, and a driving boss respectively cooperating with the initial position detection mechanism and the closing position detection mechanism is provided on the side of the third gear, and the initial position detection mechanism and the closing position detection mechanism respectively extend to the rotation path of the driving boss to cooperate.

[0017] Preferably, the auxiliary module is also provided with a tripping piece connected to the circuit breaker unit, and a tripping detection mechanism cooperating with the tripping piece, and a tripping boss cooperating with the tripping piece is provided on the third gear, driving the third gear to rotate in the opposite direction to push the tripping piece, so that the tripping piece drives the circuit breaker unit to trip.

[0018] Preferably, the initial position detection mechanism, the closing position detection mechanism and the tripping detection mechanism are respectively micro switches, the closing position detection mechanism and the opening state monitoring mechanism are relatively arranged on both sides of the initial position detection mechanism, and the tripping detection mechanism is arranged above the initial position detection mechanism; the initial position detection mechanism, the closing position detection mechanism and the tripping detection mechanism are arranged on the side of one side of the control panel, and the opening state monitoring mechanism is arranged on the side of the other side of the control panel.

[0019] The automatic closing module of the circuit breaker of the present invention is provided with an opening state monitoring mechanism in the automatic closing module, and the opening state monitoring mechanism corresponds to the opening position or the closing position of the auxiliary handle. Whether the circuit breaker unit is in the opening state is detected by the opening state monitoring mechanism. When it is detected that the circuit breaker unit is in the opening state, the control driving mechanism can automatically close the circuit breaker unit again after a slight delay, so that the circuit breaker unit is automatically closed after the temporary fault of the line is eliminated, and the power supply of the power system is restored in time, thereby ensuring the reliability of the power supply of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;

[0021] Figure 2 is an exploded view of the power taking mechanism of an embodiment of the present invention;

[0022] Figure 3 This is the first embodiment of the power taking mechanism of the present invention;

[0023] Figure 4 This is the second embodiment of the power taking mechanism of the present invention;

[0024] Figure 5 It is a schematic diagram of the coordination between the power taking mechanism and the wiring mechanism in an embodiment of the present invention;

[0025] Figure 6 is another schematic diagram of the coordination between the power taking mechanism and the wiring mechanism according to an embodiment of the present invention;

[0026] Figure 7 is a schematic structural diagram of a cover shell according to an embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of the cooperation between the cover and the second shell according to an embodiment of the present invention;

[0028] Fig. 9 is a schematic diagram of the structure of the locking mechanism after assembly according to an embodiment of the present invention;

[0029] Fig.10 is a schematic diagram of the assembly of the locking mechanism of an embodiment of the present invention;

[0030] Fig.11 is a schematic structural diagram of a second housing according to an embodiment of the present invention;

[0031] Fig.12 is a schematic structural diagram of a locking mechanism according to an embodiment of the present invention;

[0032] Fig.13 is a schematic diagram of the cooperation between the locking mechanism and the first shell and the second shell according to an embodiment of the present invention;

[0033] Fig.14 is a schematic diagram of the cooperation between the locking mechanism and the second housing according to an embodiment of the present invention;

[0034] Fig.15 is a schematic diagram of the structure of an electric operation module according to an embodiment of the present invention;

[0035] Fig.16 This is the action process of the auxiliary handle of the automatic closing module in the embodiment of the present invention;

[0036] Fig.17 It is a schematic diagram of the structure of the automatic closing module after the control panel is hidden in an embodiment of the present invention;

[0037] Fig.18 It is a schematic diagram of the structure of a control board according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following is combined with Figures 1 to 18 The given examples further illustrate the specific implementation of the automatic closing module of the circuit breaker of the present invention. The automatic closing module of the circuit breaker of the present invention is not limited to the description of the following examples.

[0039] like Figure 1-2 As shown, the circuit breaker of the present invention includes a circuit breaker unit 100 and an auxiliary module 200 arranged on one side of the circuit breaker unit 100, the circuit breaker unit 100 includes a first shell 300 and a wiring mechanism 700 arranged in the first shell 300, the wiring mechanism 700 includes a wiring seat 720 and a wiring screw 710 threadedly connected to the wiring seat 720, the auxiliary module 200 includes a second shell 400 and a control board 220 and an actuator respectively arranged in the second shell 400, the first shell 300 and the second shell 400 are fixed by a connecting structure, and a power supply mechanism 500 is provided at one end of the first shell 300 and the second shell 400, and the control board 220 of the auxiliary module 200 draws power from the wiring mechanism 700 of the circuit breaker unit 100 through the power supply mechanism 500.

[0040] like Figure 5-6 As shown, the power taking mechanism 500 includes a power taking piece 510 electrically connected to the wiring mechanism 700 of the circuit breaker unit 100, a power transmission mechanism electrically connected to the control board 220 of the auxiliary module 200, and a connecting mechanism connected between the power taking piece 510 and the power transmission mechanism. The power taking piece 510 is in a U-shaped structure. After the U-shaped power taking piece 510 is sleeved on both sides of the screw 711 of the wiring screw 710, the nut 712 of the wiring screw 710 is screwed to press the power taking piece 510 onto the wiring seat 720.

[0041] The power taking structure of the circuit breaker of the present invention, through the U-shaped power taking piece 510 being sleeved on both sides of the screw 711 of the wiring screw 710, can not only avoid the power taking piece 510 from being twisted when the wiring screw 710 is screwed, thereby ensuring the reliable connection between the power taking piece 510 and the wiring mechanism 700, but also the U-shaped power taking piece 510 has a larger contact area with the wiring mechanism 700 and a smaller contact resistance.

[0042] Furthermore, it also includes a cover shell 550 for shielding the power supply mechanism 500, one end of the cover shell 550 is provided with a first mounting buckle 551 connected to the first shell 300, and the other end of the cover shell 550 is provided with a second mounting buckle 552 connected to the second shell 400, and the second shell 400 is provided with a power transmission hole 560 corresponding to the power transmission mechanism, one side of the power transmission hole 560 is used to avoid the power transmission mechanism, and the other side of the power transmission hole 560 is limitedly matched with the second mounting buckle 552.

[0043] like Figure 12-14 As shown, the connection structure of the circuit breaker of the present invention is used to connect the first housing 300 of the circuit breaker unit 100 and the second housing 400 of the auxiliary module 200, and the connection structure includes a locking mechanism 600 ( Fig.10 ), the locking mechanism 600 includes a buckle plate 620 that cooperates with the first shell 300, a first locking buckle 610 that cooperates with the second shell 400, and a connecting plate 630 connected between the first locking buckle 610 and the buckle plate 620. The second shell 400 and the first shell 300 are respectively provided with a first locking hole 410 and a plug hole 310. The first locking buckle 610 of the locking mechanism 600 can be inserted into the first locking hole 410 to be fixed to the second shell 400, and the buckle plate 620 can be inserted into the plug hole 310 to press the first shell 300 onto the second shell 400.

[0044] In the connection structure of the circuit breaker of the present invention, the locking mechanism 600 is inserted into the first locking hole 410 through the first locking buckle 610 to be fixed to the second shell 400, and the buckle plate 620 is inserted into the insertion hole 310 to press the first shell 300 onto the second shell 400, which can avoid the first shell 300 or the second shell 400 being directly connected through too many buckle structures. It is not only reliable in connection and convenient in loading and unloading, but also highly versatile and can be applicable to circuit breaker shells of different sizes.

[0045] Figure 1-8 The preferred embodiment of the power supply structure of the circuit breaker of the present invention is shown. The circuit breaker unit 100 of the present embodiment is a leakage protection circuit breaker, and the auxiliary module 200 is an electric operation module for driving the circuit breaker unit 100 to close. The power supply structure of the circuit breaker of the present invention includes a power supply mechanism 500 for supplying power from the wiring mechanism 700 of the circuit breaker unit 100 and supplying power to the auxiliary module 200. The power supply mechanism 500 includes a power supply sheet 510 electrically connected to the wiring mechanism 700 of the circuit breaker unit 100, a power supply mechanism electrically connected to the control board 220 of the auxiliary module 200, and a connection mechanism connected between the power supply sheet 510 and the power supply mechanism.

[0046] like Figure 5-6As shown, the structures of the two wiring mechanisms 700 are basically the same. The wiring mechanism 700 includes a wiring seat 720 and a wiring screw 710. The wiring seat 720 includes a wiring board 722 and a movable wiring frame 721. One end of the wiring board 722 is inserted into the wiring frame 721 to fix the wire, and the other end of the wiring board 722 is located outside the wiring frame 721 to fix the power extraction piece 510. The wiring screw 710 passes through the wiring board 722 located outside the wiring frame 721 and is threadedly connected to the wiring frame 721. Rotating the wiring screw 710 can drive the wiring board 722 and the wiring frame 721 to move closer to each other, so that the wiring frame 721 and the wiring screw 710 respectively press the wire and the power extraction piece 510 against the two ends of the wiring board 722.

[0047] Specifically, the wiring board 722 is a U-shaped structure. The wiring board 722 includes an upper wiring portion 7221 and a lower wiring portion 7222 that are arranged opposite to each other, and a side wiring portion 7223 connected between the upper wiring portion 7221 and one end of the lower wiring portion 7222. The lower wiring portion 7222 is inserted into the inner side of the wiring frame 721 and is arranged opposite to the side wall of the bottom side of the wiring frame 721. When the wiring frame 721 moves close to the wiring screw 710, the side wall of the bottom side of the wiring frame 721 is driven to press the wires tightly against the wiring. The bottom side of the lower wiring part 7222 is fixed, the upper wiring part 7221 is located above the wiring frame 721, the screw 711 of the wiring screw 710 passes through the upper wiring part 7221 and is threadedly connected to the side wall of the top side of the wiring frame 721, and the nut 712 of the wiring screw 710 is located on the side of the upper wiring part 7221 away from the wiring frame 721. When the wiring screw 710 moves close to the wiring frame 721, it drives the nut 712 to press the power extraction sheet 510 against the top side of the upper wiring part 7221. Regardless of the thickness of the wire 531, or when there is no wire 531, after tightening, the nut 712 can always be in close contact with the power extraction sheet 510.

[0048] like Figure 2-3 The first embodiment of the power taking mechanism 500 is shown. The connection mechanism of this embodiment is a circuit board 530 connected to the power taking sheet 510. The power supply mechanism is a pin (not shown in the figure) arranged on the circuit board 530 or a wire (not shown in the figure) welded to the circuit board 530. A connection hole 531 for installing the pin or for welding the wire 531 is provided on the circuit board 530. One end of the pin and the wire 531 first passes through the connection hole 531 and then is welded to the circuit board 530. When the power supply mechanism is the wire 531, the other end of the wire 531 is welded to the control board 220 of the auxiliary module 200. When the power supply mechanism is a pin, a socket matching the pin is provided on the control board 220. This embodiment preferably adopts the pin method, and the power taking mechanism 500 is connected to the wiring mechanism 700 and the circuit board of the auxiliary module 200 by one-time plug-in.

[0049] Furthermore, the power extraction sheet 510 includes two power extraction arms 511 arranged in parallel, and a connecting arm 512 connected between one ends of the two power extraction arms 511. The connecting arm 512 is provided with two fixing arms 513 on the other side relative to the two power extraction arms 511. The circuit board 530 is provided with two fixing holes 5130 respectively corresponding to the fixing arms 513. The two fixing arms 513 pass through the fixing holes 5130 ( Figure 8 ) and then welded to the circuit board 530. The power extraction sheet 510 is welded to the circuit board 530 through two fixing arms 513, which not only has the characteristics of convenient and reliable connection, but also prevents the power extraction sheet 510 from breaking, reducing the occurrence of returning to the factory for repair.

[0050] like Figure 4-5 The second embodiment of the power taking mechanism 500 is shown. The power supply mechanism of this embodiment is a plug connector 520, and the connecting mechanism is a wire 531 connected between the plug connector 520 and the power taking sheet 510. A socket 540 matching with the plug connector 520 is provided on the control board 220 of the auxiliary module 200, and a power supply hole 560 for avoiding the plug connector 520 is provided on the second housing 400 of the auxiliary module 200. Of course, the plug connector 520 can also be directly connected to the wiring mechanism 700 of the circuit breaker unit 100 through a wire, which all belongs to the protection scope of the present invention.

[0051] like Figure 7-8 FIG. 5 shows a preferred embodiment of the cover 550, wherein a first mounting buckle 551 connected to the first shell 300 is provided at a top corner of one end of the cover 550, and a first mounting slot 555 ( Figure 2 ), the other end of the cover 550 is provided with a second mounting buckle 552 connected to the second housing 400, the cover 550 is provided with a baffle 554 between the second mounting buckle 552 and the power transmission mechanism, the second housing 400 is provided with a power transmission hole 560 corresponding to the power transmission mechanism, and the baffle 554 can be inserted into the second housing 400 through the power transmission hole 560. The second housing 400 can not only be more reliably fixed to the cover 550 through the second mounting buckle 552, but also the baffle 554 inserted into the power transmission control 560 can play a role in dust prevention and insulation.

[0052] Furthermore, the first mounting buckle 551 is in a U-shaped structure. The first mounting buckle 551 includes two supporting members 810 arranged opposite to each other. One end of the two supporting members 810 is connected to the cover 550 respectively. The other ends of the two supporting members 810 are provided with claws 820 in a hook structure on the sides away from each other. One side of the power transmission hole 560 is used to avoid the power transmission mechanism. The inner wall of the second shell 400 is provided with two engaging bosses 830 corresponding to the other side of the power transmission hole 560. The two engaging bosses 830 are relatively arranged on both sides of the power transmission control 560. The two supporting members 810 of the first mounting buckle 551 can pass through between the two engaging bosses 830, so that the claws 820 on the outside of the two supporting members 810 are respectively engaged with the end faces on the inside of the engaging bosses 830. The first mounting buckle 551 with a U-shaped structure is not only more reliable after connection, but also has uniform force on both sides during installation and removal, is not easy to break, and has the characteristics of long service life.

[0053] Figure 9-14 The preferred embodiment of the connection structure of the circuit breaker of the present invention is shown. The connection structure of the circuit breaker of the present invention is used to connect the first housing 300 of the circuit breaker unit 100 and the second housing 400 of the auxiliary module 200.

[0054] like Figure 10-11 As shown, the connection structure of the circuit breaker of the present invention includes a locking mechanism 600 connected between one end of the first housing 300 and the second housing 400, a second locking buckle 640 connected between the other end of the first housing 300 and the second housing 400, and a third locking buckle 650 connected between the bottom of the first housing 300 and the second housing 400;

[0055] The second housing 400 and the first housing 300 are provided with a first locking hole 410 and a plug hole 310 respectively matched with the two ends of the locking mechanism 600, the second locking buckle 640 and the third locking buckle 650 are respectively arranged on the second housing 400, and the first housing 300 is provided with a second locking hole 320 and a third locking hole 330 respectively corresponding to the second locking buckle 640 and the third locking buckle 650, and the second locking buckle 640 and the third locking buckle 650 can be respectively inserted into the second locking hole 320 and the third locking hole 330;

[0056] The connecting line of the insertion hole 310, the second locking hole 320 and the third locking hole 330 on the first shell 300 forms a triangle, and the connecting line of the first locking hole 410, the second locking buckle 640 and the third locking buckle 650 on the second shell 400 also forms a triangle, that is, the connecting line of the locking mechanism 600, the second locking buckle 640 and the third locking buckle 650 forms a triangle.

[0057] The connection structure of the circuit breaker of the present invention has a more reliable connection and fixing effect through the locking mechanism 600, the second locking buckle 640 and the third locking buckle 650 distributed in a triangular structure. Moreover, during assembly, the second locking buckle 640 and the third locking buckle 650 can be assembled first, and then the locking mechanism 600 can be assembled. During disassembly, the locking mechanism 600 can also be removed first, which has the characteristics of low difficulty in assembly and disassembly.

[0058] Furthermore, the third locking buckle 650 connected between the first shell 300 and the bottom of the second shell 400 is arranged at one end of the bottom of the second shell 400 close to the third locking buckle 640, and the thickness of the third locking buckle 650 gradually decreases in the direction close to the third locking buckle 640, and an inclined buckle surface 651 is formed on the top side of the third locking buckle 650. The inclined buckle surface 651 has the function of assembly guidance, preventing the second shell 400 from being in the wrong direction before assembly, which can not only optimize the assembly process and facilitate installation, but also prevent the first shell 300 from being damaged. Preferably, the middle part of the buckle surface 651 is bent toward the top side to form a chamfered structure, which can facilitate the connection between the third locking buckle 640 and the first shell 300 and further reduce the difficulty of assembly.

[0059] Furthermore, the auxiliary module 200 also includes an auxiliary handle 210 connected to the operating handle 110 of the circuit breaker unit 100, and the auxiliary handle 210 is provided with a linkage member 211 in a U-shaped structure at one end close to the operating handle 110, and the linkage member 211 can be sleeved on the operating handle 110 to cooperate with the upper limit; the end surface of the auxiliary handle 210 is provided with a linkage shaft 213 on the inner side of the linkage member 211, and the operating handle 110 is provided with a linkage groove 214 that cooperates with the linkage shaft 213, and the linkage shaft 213 can be inserted into the linkage groove 214 to limit the position.

[0060] Preferably, the cross section of the linkage shaft 213 is a cross-shaped structure, and limiting grooves 215 are respectively provided on the circumference of the linkage shaft 213 , and limiting ribs that cooperate with the limiting grooves 215 are provided in the linkage groove 214 of the operating handle 110 .

[0061] like Figure 7 , 12 As shown, the first locking buckle 610 and the first installation buckle 551 have the same structure, and both the first locking buckle 610 and the first installation buckle 551 are in a U-shaped structure.

[0062] The first locking buckle 610 includes two supporting members 810 arranged opposite to each other, one end of the two supporting members 810 is connected to the connecting plate 630 respectively, and the other ends of the two supporting members 810 are provided with claws 820 in a hook structure on the sides away from each other, and the inner wall of the second housing 400 is provided with engaging bosses 830 on both sides of the first locking hole 410 respectively, and the two supporting members 810 of the first locking buckle 610 can pass through between the two engaging bosses 830, so that the claws 820 on the outer sides of the two supporting members 810 are respectively engaged with the end faces on the inner sides of the engaging bosses 830. The first locking buckle 610 with a U-shaped structure is not only more reliable after connection, but also has uniform force on both sides during installation and removal, is not easy to break, and has the characteristics of long service life.

[0063] The circuit breaker unit 100 includes a stacked thermal magnetic protection pole 120 and a leakage protection pole 130, both ends of which are provided with a wiring mechanism 500, the leakage protection pole 130 includes a zero-sequence current transformer, and a leakage protection main circuit conductor passing through the zero-sequence current transformer, and both ends of the leakage protection main circuit conductor are connected to the line through the wiring mechanism 500, respectively, the thermal magnetic protection pole 120 includes a moving contact and a stationary contact relatively arranged in the first housing 300, an operating mechanism connected to the moving contact, a handle 110 connected to the operating mechanism, and a bimetallic strip and a magnetic flux converter matched with the operating mechanism, and the stationary contact and the moving contact are connected to the line through the wiring mechanisms 700 at both ends of the first housing 300;

[0064] The operating mechanism includes a lock buckle and a trip buckle that are snap-fitted. When the lock buckle and the trip buckle are snapped, rotating the operating handle can drive the moving contact and the static contact to contact and conduct the line through the operating mechanism to achieve closing and opening, and at the same time store energy for the operating mechanism and maintain balance. The bimetallic strip, the flux converter and the zero-sequence current transformer drive the lock buckle and the trip buckle to release when the line has an overload, short circuit and leakage fault respectively. After the operating mechanism loses balance, it releases energy and drives the static contact and the moving contact to separate, achieving tripping to protect the line. When the short circuit or overload fault disappears, the operating handle 110 is required to drive the lock buckle and the trip buckle to buckle again to achieve reclosing. Otherwise, the operating handle 110 cannot drive the operating mechanism to close, and the operating mechanism cannot return to the balanced state under energy storage, so that effective protection can be provided when the line fails next time.

[0065] The auxiliary module 200 includes a control panel 220, an actuator, and an auxiliary handle 210 connected to the circuit breaker unit 100. The control panel 220 can drive the actuator to move under remote control, and the actuator drives the auxiliary handle 210 to move. The auxiliary handle 210 drives the operating handle 130 of the circuit breaker unit 100 to close the circuit breaker, so that the lock and the trip button are locked again, which can avoid manual closing on site. It can be understood that the circuit breaker unit 100 can include multiple thermal magnetic protection poles 120 respectively connected to different phase lines, and the circuit breaker unit 100 can also have only one protection function among overload, short circuit and leakage protection, or two of them. In addition, the reclosing and reopening of the circuit breaker unit 100 are the same action process, and the rotation direction of the operating handle 110 is the same during reclosing and reopening. The difference is that the rotation angle of the operating handle 110 during reclosing and reopening may be slightly larger, so that the trip button can be rotated to the top of the lock, so that the trip button can be connected to the lock when the operating handle 110 is released. Therefore, in addition to the reclosing function, the electric operation module can also play a closing role, which all belong to the protection scope of the present invention.

[0066] like Figure 15-16 As described above, the automatic closing module of the circuit breaker of the present invention is assembled on one side of the circuit breaker unit 100, and the automatic closing module includes an auxiliary housing and an auxiliary handle 210, a control panel 220 and a driving mechanism respectively installed in the auxiliary housing. The auxiliary handle 210 is used to be linked with the operating handle 110 of the circuit breaker unit 100. A tripping state monitoring mechanism 240 cooperating with the auxiliary handle 210 is provided in the auxiliary housing. The tripping state monitoring mechanism 240 and the driving mechanism are respectively connected to the control panel 220. When the circuit breaker unit 100 trips, the operating handle 110 drives the auxiliary handle 210 to trigger the tripping state monitoring mechanism 240. After receiving the circuit breaker tripping signal transmitted by the tripping state monitoring mechanism 240, the control unit controls the driving mechanism to push the auxiliary handle 210 to drive the operating handle 110 to close the circuit breaker unit 100.

[0067] The automatic closing module of the circuit breaker of the present invention is provided with an opening state monitoring mechanism 240 in the automatic closing module. The opening state monitoring mechanism 240 corresponds to the opening position or the closing position of the auxiliary handle 210. The opening state monitoring mechanism 240 detects whether the circuit breaker unit 100 is in the opening state. When it is detected that the circuit breaker unit 100 is in the opening state, the control driving mechanism can automatically close the circuit breaker unit 100 again after a slight delay, so that the circuit breaker unit 100 is automatically closed after the temporary fault of the line is eliminated, and the power supply of the power system is restored in time, thereby ensuring the reliability of the power supply of the power system.

[0068] The automatic closing module of this embodiment does not need to modify the existing circuit breaker unit. The opening and closing states of the moving and static contacts of the circuit breaker unit 100 can be obtained by modifying the auxiliary template itself. The opening state monitoring mechanism 240 includes a micro switch connected to the control unit, and the micro switch corresponds to the opening position or the closing position of the auxiliary handle 210. The auxiliary handle 210 is linked with the operating handle 110 of the circuit breaker unit 100 to achieve synchronous closing and opening. When the circuit breaker is opened, the auxiliary handle 210 rotates to the opening position with the operating handle 110, and when the circuit breaker is closed, the auxiliary handle 210 rotates to the closing position with the operating handle 110.

[0069] Taking the correspondence between the micro switch and the opening position of the auxiliary handle 210 as an example, when the auxiliary handle 210 is rotated to the opening position, the micro switch is triggered to indicate the opening state, and when the auxiliary handle 210 is rotated to the closing position, the micro switch is not triggered to indicate the closing state. Regardless of whether the micro switch is triggered or not, its state will be fed back to the control unit of the control board 220, so as to determine the opening and closing state of the circuit breaker, that is, the opening state monitoring mechanism 240 can detect the opening state and closing state of the circuit breaker. Obviously, the micro switch can also be not triggered to indicate the opening state, and triggered to indicate the closing state. The micro switch can also correspond to the closing position of the auxiliary handle 210.

[0070] In one embodiment, the control panel 220 is provided with a control unit, which is a control circuit, connected to the micro switch of the opening state monitoring mechanism 240 through the hardware control circuit, to detect the opening and closing state of the circuit breaker unit 100, and when the circuit breaker unit 100 is in the opening state, the driving mechanism is driven to close the circuit breaker. In another embodiment, the control unit is a microcontroller MCU, which is connected to the opening state monitoring mechanism 240, and the microcontroller MCU is a microcontroller chip such as a single-chip microcomputer or an ARM chip, and detects the opening and closing state of the circuit breaker unit 100 by combining software and hardware. When the circuit breaker unit 100 is in the opening state, the driving mechanism is driven to close the circuit breaker.

[0071] Further, the automatic closing module is also provided with a mode conversion mechanism, which is connected to the control unit of the control panel 220 and is used to set the automatic closing module to a manual mode or an automatic mode. The mode conversion mechanism includes a switch connected to the control unit of the control panel 220, and the switch can be a micro switch, a dial switch, an electronic switch or a mechanical switch, etc. For example, the switch trigger indicates the automatic mode, and the non-trigger indicates the manual mode. If the mode conversion mechanism is set to the manual mode, the automatic closing module will not automatically close the circuit, regardless of whether the opening state monitoring mechanism 240 detects that the circuit breaker is in the opening state, the control unit will not automatically control the driving mechanism to push the auxiliary handle 210 to drive the operating handle 110 to close the circuit breaker unit 100; if the mode conversion mechanism is set to the automatic mode, after the opening state monitoring mechanism 240 detects that the circuit breaker is in the opening state, after a certain delay time t1, the control unit automatically controls the driving mechanism to push the auxiliary handle 210 to drive the operating handle 110 to close the circuit breaker unit 100.

[0072] This enables the circuit breaker composed of the automatic closing module and the circuit breaker unit 100 of the present invention to be applied to some occasions requiring stable power supply. For example, when applied to the gantry system of ETC toll collection, only when the ETC gantry system provides stable power supply can the non-stop toll collection system service continue to be online. When the circuit breaker unit 100 fails and trips in the open state, in most cases, the line fault (such as lightning strike, wind damage, etc.) is temporary, and the insulation performance of the line (insulator and air gap) can be restored after the circuit breaker trips, waiting for a certain delay time t1, t1 is usually greater than 2 seconds, for example, after 10 seconds, the reclosing can be successful, which improves the reliability of the power supply of the power system.

[0073] Further, in order to improve the safety of the automatic closing module automatically driving the circuit breaker to close, and to avoid permanent faults or faults that need to be manually resolved, after the automatic closing module automatically drives the circuit breaker to close, it quickly detects that the circuit breaker is in the open state, and repeats a certain number of times m, m is greater than 1, for example, 4 times or 6 times, then the automatic closing module enters a self-locking state, no longer automatically closes, and needs to manually remove the hidden danger and manually close the circuit. The control unit enters a self-locking state within a certain fault monitoring time t2, for example, within 60s, and detects that the circuit breaker is converted from the closed state to the open state m times through the open state monitoring mechanism 240, and no longer automatically closes the circuit breaker unit 100, m is greater than 1. After the automatic closing module enters the self-locking state, the control unit detects that the circuit breaker is converted from the open state to the closed state through the open state monitoring mechanism 240, and the closed state lasts for at least a certain self-locking recovery time t3, for example, for 60s, then the automatic closing module releases the self-locking state and restores the automatic closing of the circuit breaker unit 100. m times, the delay time t1, the fault monitoring time t2 and the self-locking recovery time t3 are preset and can be adjusted as needed, and the fault monitoring time t2 and the self-locking recovery time t3 can be the same or different.

[0074] A specific implementation manner is that each time the control unit detects that the circuit breaker switches from the closed state to the open state through the open state monitoring mechanism 240, it stores each opening time record.

[0075] The control unit obtains the state of the mode conversion mechanism. If it is in manual mode, the closing operation is not automatically performed; if it is in automatic mode, the most recent m opening time records are read, and the time difference between the most recent first opening time and the most recent mth opening time is compared with the fault monitoring time t2. If the opening time difference is greater than or equal to the fault monitoring time t2, the control unit waits for the delay time t1, and the automatic control drive mechanism pushes the auxiliary handle 210 to drive the operating handle 110 to close the circuit breaker unit 100; if the opening time difference is less than the fault monitoring time t2, the self-locking state is entered.

[0076] If the number of opening time records is less than m, the control unit automatically controls the driving mechanism to close the circuit breaker unit 100 .

[0077] When the control unit detects that the circuit breaker switches from the open state to the closed state through the open state monitoring mechanism 240, it determines whether the automatic closing module is in the self-locking state. If the automatic closing module is in the self-locking state, it starts to monitor the duration. If the circuit breaker does not switch from the closed state to the open state within the self-locking recovery time t3, the automatic closing module releases the self-locking state.

[0078] The working process of the automatic closing module of the circuit breaker of the present invention is as follows:

[0079] 1. Manual mode (the automatic closing module is switched to manual mode): after the circuit breaker unit 100 is tripped due to a fault such as leakage, overload, or short circuit, it cannot automatically close.

[0080] 2. Automatic mode (the automatic closing module is switched to the automatic state and the circuit breaker is closed 4 times in succession):

[0081] (0) When the circuit breaker is connected to the grid for the first time, the driving mechanism drives the circuit breaker unit 100 to close;

[0082] 1. The circuit breaker is opened due to leakage, overload, short circuit or other faults. The circuit breaker state monitoring mechanism 240 detects that the circuit breaker unit 100 is opened for the first time;

[0083] (2) After a delay of 10 seconds, the circuit breaker unit 100 automatically recloses for the first time; if the fault state is not eliminated, under the action of the fault signal, the opening state monitoring mechanism 240 detects that the circuit breaker unit 100 is opened for the second time;

[0084] (3) After a delay of 10 seconds, the circuit breaker unit 100 automatically recloses for the second time; if the fault state is not eliminated, under the action of the fault signal, the opening state monitoring mechanism 240 detects that the circuit breaker unit 100 is opened for the third time;

[0085] (4) After a delay of 10 seconds, the circuit breaker unit 100 automatically recloses for the third time; if the fault state is not eliminated, under the action of the fault signal, the opening state monitoring mechanism 240 detects that the circuit breaker unit 100 is opened for the fourth time;

[0086] (5) After the fourth trip, the automatic closing module enters a locked state and cannot automatically reclose. The locked state must be unlocked by manual closing. Or if there are three fault trips within 10 minutes, the automatic closing module also enters a locked state.

[0087] 3. Power outage occurs:

[0088] 1. When the power is cut off in the closed state, the circuit breaker remains closed after the power is restored;

[0089] (2) Power outage in the open state:

[0090] a. If a call comes in within 2 minutes, keep the original status (normal opening, locked opening);

[0091] If the power can be restored within 2 minutes, it is usually caused by a fault in other parts of the circuit. After the fault in other parts is eliminated, the automatic closing module will resume its original working state;

[0092] b. If the call lasts longer than 2 minutes, the circuit breaker will be closed after the call.

[0093] If there is no power supply within 2 minutes, it is usually a problem with the power supply facilities. After ensuring that the circuit power supply is normal, the automatic closing module will perform the closing action to avoid false operations caused by faults in other parts of the circuit.

[0094] The driving part of the circuit breaker is powered by the collected main line signal. When the main line is powered off, the product determines that there is a power outage. The breakpoint time can be calculated by the time difference between the stored time before the power outage and the time after the power is restored, or during the power outage, the control unit can be powered by a battery to count the power outage time.

[0095] That is, if a power outage occurs in the open state, the circuit breaker will automatically close after power is restored if the power outage time is greater than the power outage time threshold t4. If the power outage time is less than or equal to the power outage time threshold t4, the circuit breaker will remain in the open state. t4 can be set to 2 minutes or other time.

[0096] Furthermore, the auxiliary handle 210 includes a pivot portion 211 and a driving portion 212 and a linkage portion 213 respectively arranged at both ends of the pivot portion 211, the linkage portion 213 is connected to the operating handle 110 of the circuit breaker unit 100 through the linkage member 211, the top end of the driving portion 212 is connected to the pivot portion 211, the bottom end of the driving portion 212 cooperates with the opening state monitoring mechanism 240, and the side of the driving portion 212 cooperates with the driving mechanism.

[0097] Furthermore, a driving groove 214 with an arc-shaped structure is provided on the side of the driving part 212, and the driving mechanism extends to the inner side of the driving groove 214 to cooperate. A triggering boss 215 with an arc-shaped structure is provided on the end face of the bottom end of the driving part 212. The triggering boss 215 with an arc-shaped structure cooperates more smoothly with the opening state monitoring mechanism 240, and there will be no problems such as sticking.

[0098] like Figure 16-17 As shown in the figure, as an implementation of the opening state monitoring mechanism 240, the opening state monitoring mechanism 240 is a micro switch installed on the control board 220, the micro switch is electrically connected to the control unit, the side of the micro switch is connected to the control board 220, and the top of the micro switch is provided with a lever 242 extending to the rotation path of the driving part 212. The opening state monitoring mechanism 240 of this implementation has the characteristics of simple structure, convenient assembly and low cost.

[0099] like Fig.18As shown, as another embodiment of the opening state monitoring mechanism 240, the opening state monitoring mechanism 240 includes a circuit board 241 vertically connected to the control board 220, and a micro switch installed on the side of the circuit board 241, the circuit board 241 is inserted into the control board 220, the micro switch is electrically connected to the control unit of the control board 220 through the circuit board 241, the circuit board 241 is arranged opposite to the end face of the bottom end of the driving part 212, the micro switch is arranged between the circuit board 241 and the end face of the bottom end of the driving part 212, the side face of one side of the micro switch is connected to the control board 220, and the side face of the other side of the micro switch is matched with the end face of the bottom end of the driving part 212. The opening state monitoring mechanism 240 of this embodiment has the characteristic of reliable matching.

[0100] Further, the driving mechanism includes a motor 221 connected to the control unit of the control panel 220, a screw 222 connected to the motor 221, a first gear 223 meshing with the screw 222, a second gear 224 meshing with the first gear 223, a third gear 225 meshing with the second gear 224, and a connecting rod 226 hinged at the eccentric point of the third gear 225. When it is necessary to drive the circuit breaker unit 100 to close, the motor 221 drives the screw 222 to rotate, and drives the first gear 223, the second gear 224 and the third gear 225 to rotate in turn. The connecting rod 226 is driven by the third gear 225 to push the auxiliary handle 210 to drive the operating handle 110 to close the circuit breaker unit 100.

[0101] Furthermore, an initial position detection mechanism 227 and a closing position detection mechanism 228 that respectively cooperate with the third gear 225 are provided around the third gear 225. The initial position detection mechanism 227 and the closing position detection mechanism 228 are respectively connected to the control unit of the control board 220. A driving boss 2280 that respectively cooperates with the initial position detection mechanism 227 and the closing position detection mechanism 228 is provided on the side of the third gear 225. The initial position detection mechanism 227 and the closing position detection mechanism 228 respectively extend to the rotation path of the driving boss 2280 to cooperate. The initial position detection mechanism 227 and the closing position detection mechanism 228 can respectively detect the initial operating position and the closing operating position of the third gear 225 and feed back to the control unit.

[0102] When the circuit breaker unit 100 is opened, the motor 221 starts to start, and the third gear 225 rotates from the position of the initial position detection mechanism 227 (at this time, the initial position detection mechanism 227 is in a closed state) to the direction of the closing position detection mechanism 228. The third gear 225 drives the connecting rod 226 to push the auxiliary handle 210 to drive the operating handle 110 to close the circuit breaker unit 100. When the closing position detection mechanism 228 is detected to be in a closed state, and the opening state monitoring mechanism 240 is detected to be in a disconnected state, the product is closed successfully, the motor returns to the initial position S2, the S2 micro switch is turned on, and the motor stops rotating. When the third gear 225 rotates to the closing operation position, the closing position detection mechanism 228 is triggered, indicating that the closing action has been completed, but whether the circuit breaker unit 100 has completed closing is determined by whether the opening state monitoring mechanism 240 is triggered.

[0103] Furthermore, the initial position detection mechanism 227 and the closing position detection mechanism 228 are micro switches.

[0104] Furthermore, a tripping member connected to the circuit breaker unit 100 and a tripping detection mechanism 229 cooperating with the tripping member are also provided in the auxiliary module 200, and a tripping boss 2290 cooperating with the tripping member is provided on the third gear 225. When the circuit breaker unit 100 needs to be tripped by remote operation, the third gear 225 is driven to rotate in the opposite direction to push the tripping member, so that the tripping member drives the circuit breaker unit 100 to trip, and when the tripping member drives the circuit breaker unit 100 to trip, the tripping detection mechanism 229 is triggered, and feedback is given to the control unit to indicate that the tripping action is completed and the motor 221 is turned off.

[0105] Furthermore, the initial position detection mechanism 227, the closing position detection mechanism 228 and the tripping detection mechanism 229 are respectively micro switches, the closing position detection mechanism 228 and the opening state monitoring mechanism 240 are relatively arranged on both sides of the initial position detection mechanism 227, and the tripping detection mechanism 229 is arranged above the initial position detection mechanism 227.

[0106] Furthermore, the initial position detection mechanism 227 , the closing position detection mechanism 228 and the tripping detection mechanism 229 are arranged on the side of one side of the control panel 220 , and the opening state monitoring mechanism 240 is arranged on the side of the other side of the control panel 220 .

[0107] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An automatic closing module for a circuit breaker, characterized in that: The invention comprises an auxiliary housing, an auxiliary handle (210), a control panel (220) and a driving mechanism respectively installed in the auxiliary housing, wherein the auxiliary handle (210) is used for linkage connection with an operating handle (110) of a circuit breaker unit (100), a switch-off state monitoring mechanism (240) matched with the auxiliary handle (210) is arranged in the auxiliary housing, the control panel (220) is provided with a control unit, the switch-off state monitoring mechanism (240) and the driving mechanism are respectively connected to the control unit of the control panel (220), when the circuit breaker unit (100) trips, the operating handle (110) drives the auxiliary handle (210) to trigger the switch-off state monitoring mechanism (240), and after receiving a circuit breaker switch-off signal transmitted by the switch-off state monitoring mechanism (240), the control unit controls the driving mechanism to push the auxiliary handle (210) to drive the operating handle (110) to close the circuit breaker unit (100); The invention also comprises a power taking mechanism (500) and a cover (550) for shielding the power taking mechanism (500). The automatic closing module is assembled on one side of the circuit breaker unit (100). The power taking mechanism (500) comprises a power taking plate (510) electrically connected to the wiring mechanism (700) of the circuit breaker unit (100), a power transmission mechanism electrically connected to the control panel (220), and a connection mechanism connected between the power taking plate (510) and the power transmission mechanism. The wiring mechanism (700) comprises a wiring seat (720) and a wiring screw (710). The power taking plate (510) is in a U-shaped structure. After the U-shaped power taking plate (510) is sleeved on both sides of a screw rod (711) of the wiring screw (710), the nut (712) of the wiring screw (710) is screwed to press the power taking plate (510) onto the wiring seat (720).

2. The automatic closing module of the circuit breaker according to claim 1, characterized in that: The automatic closing module is further provided with a mode conversion mechanism, which is connected to a control unit of a control panel (220) and is used to set the automatic closing module to a manual mode or an automatic mode. If the mode conversion mechanism is set to the manual mode, the control unit will not automatically control the drive mechanism to close the circuit breaker unit (100); if the mode conversion mechanism is set to the automatic mode, the opening state monitoring mechanism (240) detects that the circuit breaker is in an opening state, and after a certain delay time t1, the control unit automatically controls the drive mechanism to push the auxiliary handle (210) to drive the operating handle (110) to close the circuit breaker unit (100).

3. The automatic closing module of the circuit breaker according to claim 2, characterized in that: When the mode conversion mechanism of the automatic closing module is in automatic mode, a self-locking state is also provided. The control unit enters a self-locking state when it detects through the opening state monitoring mechanism (240) that the circuit breaker has switched from the closing state to the opening state m times within a certain fault monitoring time t2, and no longer automatically closes the circuit breaker unit (100), wherein m is greater than 1.

4. The automatic closing module of the circuit breaker according to claim 3, characterized in that: When the automatic closing module enters the self-locking state, the control unit detects through the opening state monitoring mechanism (240) that the circuit breaker switches from the opening state to the closing state, and the closing state lasts for at least a certain self-locking recovery time t3, and then the automatic closing module releases the self-locking state.

5. The automatic closing module of the circuit breaker according to claim 3, characterized in that: The control unit stores each opening time record after detecting, through the opening state monitoring mechanism (240), that the circuit breaker switches from the closing state to the opening state each time; The control unit obtains the state of the mode conversion mechanism, and if it is in manual mode, the closing operation is not automatically performed; If it is in automatic mode, the most recent m opening time records are read, and the time difference between the most recent first opening time and the most recent mth opening time is compared with the fault monitoring time t2; if the opening time difference is greater than or equal to the fault monitoring time t2, the control unit waits for a delay time t1, and then the automatic control drive mechanism pushes the auxiliary handle (210) to drive the operating handle (110) to close the circuit breaker unit (100); if the opening time difference is less than the fault monitoring time t2, then the self-locking state is entered, and the circuit breaker unit (100) is no longer automatically closed.

6. The automatic closing module of the circuit breaker according to claim 1, characterized in that: The auxiliary handle (210) comprises a pivoting portion (211), and a driving portion (212) and a linkage portion (213) respectively arranged at two ends of the pivoting portion (211); the linkage portion (213) is connected to an operating handle (110) of the circuit breaker unit (100) via a linkage member (211); the top end of the driving portion (212) is connected to the pivoting portion (211); the bottom end of the driving portion (212) cooperates with a switch-off state monitoring mechanism (240); and the side surface of the driving portion (212) cooperates with the driving mechanism.

7. The automatic closing module of the circuit breaker according to claim 6, characterized in that: The switch-off state monitoring mechanism (240) is a micro switch mounted on the control panel (220), and a lever (242) extending to the rotation path of the drive unit (212) is provided at the top of the micro switch; or, the switch-off state monitoring mechanism (240) comprises a circuit board (241) vertically connected to the control panel (220), and a micro switch mounted on a side surface of the circuit board (241), the end surfaces of the circuit board (241) and the bottom end of the drive unit (212) are arranged opposite to each other, and the micro switch is arranged between the circuit board (241) and the end surfaces of the bottom end of the drive unit (212).

8. The automatic closing module of the circuit breaker according to claim 1, characterized in that: The driving mechanism comprises a motor (221) connected to a control unit of a control panel (220), a screw rod (222) connected to the motor (221), a first gear (223) meshing with the screw rod (222), a second gear (224) meshing with the first gear (223), a third gear (225) meshing with the second gear (224), and a connecting rod (226) hinged at an eccentric position of the third gear (225); the connecting rod (226) pushes the auxiliary handle (210) to drive the operating handle (110) to close the circuit breaker unit (100).

9. The automatic closing module of the circuit breaker according to claim 8, characterized in that: An initial position detection mechanism (227) and a closing position detection mechanism (228) respectively cooperating with the third gear (225) are arranged around the third gear (225); the initial position detection mechanism (227) and the closing position detection mechanism (228) are respectively connected to a control unit of the control panel (220); a driving boss (2280) respectively cooperating with the initial position detection mechanism (227) and the closing position detection mechanism (228) is arranged on a side surface of the third gear (225); the initial position detection mechanism (227) and the closing position detection mechanism (228) respectively extend to the rotation path of the driving boss (2280) for cooperating.

10. The automatic closing module of the circuit breaker according to claim 9, characterized in that: The auxiliary module (200) is further provided with a tripping member connected to the circuit breaker unit (100), and a tripping detection mechanism (229) cooperating with the tripping member; a tripping boss (2290) cooperating with the tripping member is provided on the third gear (225); the third gear (225) is driven to rotate in the opposite direction to push the tripping member, so that the tripping member drives the circuit breaker unit (100) to trip; the initial position detection mechanism (227), the closing position detection mechanism (228) and the tripping detection mechanism (229) are respectively micro switches; the closing position detection mechanism (228) and the opening state monitoring mechanism (240) are relatively arranged on both sides of the initial position detection mechanism (227); the tripping detection mechanism (229) is arranged above the initial position detection mechanism (227); the initial position detection mechanism (227), the closing position detection mechanism (228) and the tripping detection mechanism (2 29) is arranged on the side of one side of the control panel (220), and the opening state monitoring mechanism (240) is arranged on the side of the other side of the control panel (220); the terminal block (720) includes a terminal block (722) and a movable terminal frame (721), one end of the terminal block (722) is inserted into the terminal frame (721) for fixing the wire, and the other end of the terminal block (722) is located outside the terminal frame (721) for fixing the power extraction plate (510), and the terminal screw (710) passes through the terminal block (722) located outside the terminal frame (721) and is threadedly connected to the terminal frame (721), and rotating the terminal screw (710) can drive the terminal block (722) and the terminal frame (721) to move closer to each other, so that the terminal frame (721) and the terminal screw (710) respectively press the wire and the power extraction plate (510) against the two ends of the terminal block (722).

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