Three-phase recloser based on permanent magnet operating mechanism

Abstract

The application provides a three-phase recloser based on a permanent magnet operating mechanism, which comprises an assembly shell and three-phase pole columns arranged on the top of the assembly shell, one side of the assembly shell is provided with a disconnecting handle, a disconnecting indicating needle is sleeved on the rotating shaft of the disconnecting handle, the disconnecting handle is in transmission connection with a permanent magnet operating mechanism in the assembly shell, the permanent magnet operating mechanism is in transmission connection with a three-phase reclosing main shaft, the three-phase reclosing main shaft is in transmission connection with a contactor assembly in the pole column, a controller and a switching-on and switching-off counter are further arranged in the assembly shell, and the controller is in electric connection with the switching-on and switching-off counter and the permanent magnet operating mechanism. The switching-on and switching-off are realized through the permanent magnet operating mechanism, the parameters of the coil can be flexibly adjusted according to actual conditions to adapt to different elastic forces and driving strokes, the flexibility is high, the structure is simple, and the reliability is high.

Description

Technical Field

[0001] This application belongs to the field of high voltage switch technology, specifically relating to a three-phase recloser based on a permanent magnet operating mechanism. Background Technology

[0002] The three-phase automatic circuit recloser is a product widely used overseas. Defined by IEEE (and IEC) as "an automatic control device for connecting, carrying, and automatically interrupting and reclosing AC circuits, having a predetermined disconnection and reclosing sequence, followed by reset, holding closed, or locking operation. It includes a set of control elements required for detecting overcurrent and controlling the operation of the recloser."

[0003] The principle of three-phase reclosers is very similar to that of pole-mounted circuit breakers + FTUs in China. With the acceleration of global grid intelligence and new energy transformation, the application of reclosers in overseas markets will be further expanded, especially in the fields of distributed energy access, extreme climate response, power supply in rural and remote areas, and smart distribution.

[0004] Currently, conventional reclosers use spring operating mechanisms to achieve opening and closing operations. The transmission mechanism design is relatively complex, with many transmission links and moving parts. Spring operating mechanisms are prone to failure during operation, such as failure to open or close, or incomplete opening or closing, resulting in a high probability of unreliability. Furthermore, the spring buffering capacity of the spring operating components is relatively fixed, which can easily lead to problems such as limited outgoing line opening or overshooting during opening. Summary of the Invention

[0005] This application provides a three-phase recloser based on a permanent magnet operating mechanism to solve or partially solve the problems mentioned in the background art.

[0006] This application provides a three-phase recloser based on a permanent magnet operating mechanism, including an assembly housing and a three-phase pole set on the top of the assembly housing. A trip handle is provided on one side of the assembly housing. A trip indicator needle is sleeved on the rotating shaft of the trip handle. The trip handle is drivenly connected to the permanent magnet operating mechanism inside the assembly housing. The permanent magnet operating mechanism is drivenly connected to the three-phase reclosing shaft. The three-phase reclosing shaft is drivenly connected to the switch assembly inside the pole.

[0007] The assembly housing is also equipped with a controller and a circuit breaker counter, and the controller is electrically connected to the circuit breaker counter and the permanent magnet operating mechanism.

[0008] Preferably, main hinge frames are provided on both sides of the assembly housing along its length, and the two ends of the three-phase coincident main shaft are respectively hinged to the two main hinge frames. A permanent magnet operating mechanism and an oil buffer device are movably connected to the lower part of the three-phase coincident main shaft. The permanent magnet operating mechanism and the oil buffer device are respectively set close to the two main hinge frames.

[0009] The end of the transmission iron core of the permanent magnet operating mechanism is hinged to the transmission hinge frame, which is fixed to the bottom of the three-phase over-closing shaft. The opening handle is connected to the opening and closing shaft. The opening and closing shaft rotates from the width direction of the permanent magnet operating mechanism and is inserted into the permanent magnet operating mechanism and is movably connected to the transmission iron core. The permanent magnet operating mechanism has a coil winding inside relative to the outer periphery of the sliding groove.

[0010] The buffer section of the oil buffer device is hinged to the connecting hinge frame, which is fixed to the bottom of the three-phase coincident main shaft.

[0011] Preferably, a drive cam is provided at the end of the opening and closing shaft, and a drive groove is provided on the outer periphery of the transmission iron core, with the outer periphery of the drive cam abutting against the side wall of the drive groove.

[0012] Preferably, a first limiting piece is connected to the outer periphery of the opening and closing shaft, a limit switch is fixed on the side of the opening and closing shaft near the oil buffer device, and a mounting bracket for fixing the permanent magnet operating mechanism is provided on the side of the opening and closing shaft away from the oil buffer device. The limiting piece moves in contact with the limit switch and the mounting bracket.

[0013] The opening and closing shaft is fitted with a second limiting plate on the side of the permanent magnet operating mechanism relative to the first limiting plate. A U-shaped slide is hinged to the end of the second limiting plate. The U-shaped slide is connected to a fixed bracket by a buffer spring. The fixed bracket is fixed to the side wall of the assembly housing. A limiting pin is fixed above the U-shaped slide and the second limiting plate.

[0014] Preferably, a second pointer is provided on the outer side of the assembly housing. The second pointer includes a pointer body, the pivot of which rotates through the side wall of the assembly housing. A U-shaped linkage bracket is sleeved on the pivot of the pointer body. A clamping groove is provided at the end of the U-shaped linkage bracket. A connecting rod is slidably arranged in the clamping groove. The connecting rod is connected to the three-phase coincident main shaft.

[0015] Preferably, the switch assembly includes a steering hinge frame hinged to the three-phase coincident shaft, the steering hinge frame is connected to an insulating tie rod, the insulating tie rod is connected to a connecting rod, the connecting rod piston is inserted into a vacuum interrupter, the top of the vacuum interrupter is connected to a second conductive rod, and a flexible connecting piece is sleeved on the outer periphery of the connecting rod, the flexible connecting piece being movably connected to a first conductive rod;

[0016] A current sensor is provided around the outer periphery of the first conductive rod, and a voltage sensor is provided on the side of the flexible connecting piece away from the first conductive rod;

[0017] The ends of the first conductive rod and the second conductive rod furthest from the flexible connector are respectively provided with an outgoing terminal and an incoming terminal.

[0018] Preferably, the flexible connecting piece is a bent piece, with a connecting block fixedly provided in the bent portion. A connecting groove is provided on the connecting block, and a first conductive rod is movably inserted in the connecting groove. The shape of the connecting groove and the first conductive rod are adapted to each other, and the end of the first conductive rod movably abuts against the side wall of the bent portion of the flexible connecting piece and the side wall of the connecting groove.

[0019] Preferably, the opening and closing counter is located at the bottom of the three-phase reclosing shaft and can be either mechanically triggered or non-contact type.

[0020] Preferably, the electrode is cast in epoxy resin and coated with silicone rubber.

[0021] Preferably, the assembly housing is further provided with a handle, a pull ring, a fixing lug, and an aviation plug.

[0022] Compared with the prior art, the beneficial effects of this application are as follows:

[0023] (1) This application realizes opening and closing through a permanent magnet operating mechanism, which makes it easy to flexibly adjust the coil parameters according to the actual situation to adapt to different spring force and drive stroke. It has high flexibility, simple structure and high reliability. At the same time, the opening handle carrying the opening indicator needle marks the opening point on the basis of realizing manual opening, which is conducive to the accuracy and reliability of operation.

[0024] (2) This application uses an oil buffer device to buffer the tripping process, taking advantage of its small initial reaction force and rapid reaction force increase, to effectively absorb tripping energy and avoid tripping restriction and tripping overshoot.

[0025] (3) This application increases the conductive contact area between the first conductive rod and the flexible connecting piece by using irregularly shaped flexible connecting pieces and connecting blocks, thereby improving the conductivity. Attached Figure Description

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of this application.

[0028] Figure 2 This is a schematic diagram of the internal structure of the assembly housing in this application.

[0029] Figure 3 This is a magnified view A of this application.

[0030] Figure 4 This is a magnified view B of this application.

[0031] Figure 5 This is a magnified view C of this application.

[0032] Figure 6This is a schematic diagram of the external structure of the pole column in this application.

[0033] Figure 7 This is a schematic diagram of the internal structure of the pole column in this application.

[0034] Figure 8 This is a cross-sectional view of the permanent magnet operating mechanism of this application.

[0035] In the picture:

[0036] 1. Base column, 2. Assembly housing, 3. Opening handle, 4. Opening and closing shaft, 5. Permanent magnet operating mechanism, 6. Transmission iron core, 7. Three-phase reclosing shaft, 8. Main hinge frame, 9. Transmission hinge frame, 10. Limit switch, 11. First limit plate, 12. Second limit plate, 13. U-shaped slide, 14. Buffer spring, 15. Buffer spring, 16. Limit bracket, 17. Oil buffer device, 18. Connecting hinge frame, 19. Opening and closing counter, 20. Steering hinge frame, 21. Insulating tie rod, 22. Connecting rod, 23. Flexible connecting piece, 24. Connecting block, 25. First conductive rod, 26. Vibration arc extinguishing chamber, 27. Current sensor, 28. Voltage sensor, 29. First conductive rod, 30. Second pointer;

[0037] 31. Opening indicator needle; 41. Drive cam; 51. Mounting bracket; 101. Incoming terminal; 102. Outgoing terminal; 103. Umbrella skirt; 161. Limit pin; 201. Handle; 202. Pull ring; 203. Airplane plug; 301. Pointer body; 302. U-shaped linkage bracket; 303. Linkage rod; 501. Closing coil; 502. Permanent magnet; 503. Opening coil; 504. Return spring. Detailed Implementation

[0038] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Example 1

[0042] like Figures 1 to 8 As shown, this application provides a three-phase recloser based on a permanent magnet operating mechanism, including an assembly housing 2 and a three-phase pole 1 disposed on the top of the assembly housing 2. A trip handle 3 is disposed on one side of the assembly housing 2. A trip indicator needle 31 is sleeved on the rotating shaft of the trip handle 3. The trip handle 3 is drivenly connected to the permanent magnet operating mechanism inside the assembly housing 2. The permanent magnet operating mechanism is drivenly connected to the three-phase reclosing shaft 7. The three-phase reclosing shaft 7 is drivenly connected to the switch assembly inside the pole 1. A controller and a trip counter 19 are also disposed inside the assembly housing 2. The controller is electrically connected to the trip counter 19 and the permanent magnet operating mechanism.

[0043] The controller can be a microcontroller or other industrial computer.

[0044] Specifically, the assembly housing 2 has main hinge frames 8 on both sides along its length. The two ends of the three-phase merging shaft 7 are respectively hinged to the two main hinge frames 8. The lower part of the three-phase merging shaft 7 is movably connected to a permanent magnet operating mechanism 5 and an oil buffer device 17. The permanent magnet operating mechanism 5 and the oil buffer device 17 are respectively set close to the two main hinge frames 8. The end of the transmission iron core 6 of the permanent magnet operating mechanism 5 is hinged to a transmission hinge frame 9. The transmission hinge frame 9 is fixed to the bottom of the three-phase merging shaft 7. The trip handle 3 is connected to the tripping shaft 4. The tripping shaft 4 rotates from the width direction of the permanent magnet operating mechanism 5 and is inserted into the permanent magnet operating mechanism 5 and movably connected to the transmission iron core 6. The permanent magnet operating mechanism 5 has a coil winding arranged inside relative to the outer periphery of the sliding groove. The buffer part of the oil buffer device 17 is hinged to a connecting hinge frame 18. The connecting hinge frame 18 is fixed to the bottom of the three-phase merging shaft 7.

[0045] Specifically, the permanent magnet operating mechanism 5 is a new type of power switch operating mechanism that uses a permanent magnet to replace the traditional mechanical locking device. It realizes the circuit breaker opening and closing control through electromagnetic drive and permanent magnet holding. It is provided with a sliding groove inside, which is open to the side away from the oil buffer device 17 and has a transmission iron core 6 slidably installed inside. The transmission iron core 6 and the end side wall of the sliding groove are provided with a return spring 504. The outer periphery of the sliding groove is embedded with a closing coil 501, a permanent magnet 502, and a opening coil 503. The magnetic field directions of the closing coil 501, the opening coil 503 and the permanent magnet 502 are the same. When closing, the closing coil 501 is energized, and the magnetic field generated by the current is superimposed with the magnetic field of the permanent magnet 502, driving the transmission iron core 6 to move to the closing position, and the permanent magnet force is maintained. When opening, the opening coil 503 is energized, and the reverse current weakens the permanent magnet magnetic field. Combined with the elastic force of the return spring 504, the transmission iron core 6 is reset.

[0046] The core features of the permanent magnet operating mechanism 5 are that it eliminates the motion linkage and mechanical locking device in the spring mechanism, resulting in a simplified structure, high reliability, and maintenance-free operation.

[0047] Specifically, the transmission core 6 is made of metal. When the coil is conductive, it is driven by electromagnetic force and permanent magnet force to move along the sliding groove toward or away from the oil buffer device 17. Through the transmission hinge 9, it drives the three-phase reclosing shaft 7 to move toward or away from the oil buffer device 17, thereby controlling the opening or closing of the three-phase switch assembly that is connected to the three-phase reclosing shaft 7. At the same time, the opening and closing shaft 4 is movably connected to the transmission core 6. When the opening handle 3 rotates, it drives the opening and closing shaft 4 to rotate, thereby driving the transmission core 6 to move.

[0048] Specifically, the end of the opening and closing shaft 4 inserted into the permanent magnet operating mechanism 5 is provided with a drive cam 41, and the outer periphery of the transmission iron core 6 is provided with a drive groove. The outer periphery of the drive cam 41 abuts against the side wall of the drive groove. The transmission iron core 6 moves by the change in the outer diameter of the drive cam relative to the center line of the opening and closing shaft 4.

[0049] The outer periphery of the opening and closing shaft 4 is connected to a first limiting piece 11. A limit switch 10 is fixed on the side of the opening and closing shaft 4 near the oil buffer device 17. A mounting bracket 51 for fixing the permanent magnet operating mechanism 5 is provided on the side of the opening and closing shaft 4 away from the oil buffer device 17. The limiting piece moves in contact with the limit switch 10 and the mounting bracket 51.

[0050] The opening and closing shaft 4 is fitted with a second limiting plate 12 on the side of the first limiting plate 11 near the permanent magnet operating mechanism. The end of the second limiting plate 12 is hinged to a U-shaped slide 13. The U-shaped slide 13 is connected to a fixed bracket 15 through a buffer spring 14. The fixed bracket 15 is fixed to the side wall of the assembly housing 2. A limiting pin 161 is fixed above the U-shaped slide 13 and the second limiting plate 12. The limiting pin 161 is fixed above the U-shaped slide 13 and the second limiting plate 12 through the limiting bracket 16.

[0051] When the trip handle 3 is activated or the permanent magnet operating mechanism is powered on, the trip shaft 4 rotates, and the three-phase reclosing shaft 7 moves toward the oil buffer device 17. When it reaches the limit position, the first limit plate 11 rotates and touches the lever of the limit switch 10. The U-shaped slide 13 compresses the buffer spring 14 to the limit position, and the three-phase reclosing shaft 7 drives the moving and stationary contacts in the vacuum interrupter to separate, realizing the tripping operation. The oil buffer device 17 relies on its good buffering characteristics. At the moment when the three-phase reclosing shaft 7 contacts the oil buffer device 17, the oil buffer device 17 provides a small reaction force. As the buffering stroke increases, the buffering characteristics become steeper rapidly, absorbing the tripping energy to the maximum extent, thereby limiting the tripping rebound and tripping overshoot.

[0052] When the permanent magnet operating mechanism is powered on (opposite to the direction of the opening current) and the circuit is closed, the opening and closing shaft 4 rotates, and the three-phase reclosing shaft 7 moves away from the oil buffer device 17. When it reaches the limit position, the first limit plate 11 rotates and abuts against the mounting bracket 51, the U-shaped slide 13 releases the buffer spring 14 and returns to the original position, and the top of the U-shaped slide 13 abuts against the limit pin 161. The moving and stationary contacts in the vacuum interrupter are in contact, and the closing is completed.

[0053] Preferably, a second pointer 30 is provided on the outer side of the assembly housing 2. The second pointer 30 includes a pointer body 301. The pivot of the pointer body 301 rotates through the side wall of the assembly housing 2. A U-shaped linkage bracket 302 is sleeved on the pivot of the pointer body 301. A clamping groove is provided at the end of the U-shaped linkage bracket 302. A connecting rod 303 is slidably arranged in the clamping groove. The connecting rod 303 is connected to the three-phase coincident main shaft 7.

[0054] The three-phase reclosing shaft 7 drives the linkage rod 303 to move, which in turn drives the U-shaped linkage bracket 302 to swing, which in turn drives the pointer body 301 to rotate. The second pointer 30 uses the pointer body 301 to mark the closed or open position, further improving the indication effect of the recloser status and preventing misoperation.

[0055] Specifically, the switch assembly includes a steering hinge 20 hinged to the three-phase coincident shaft 7, the steering hinge 20 is connected to an insulating pull rod 21, the insulating pull rod 21 is connected to a connecting rod 22, the connecting rod 22 is piston-inserted into a vacuum interrupter 26, the top of the vacuum interrupter 26 is connected to a second conductive rod 29, and a flexible connecting piece 23 is sleeved on the outer periphery of the connecting rod 22, the flexible connecting piece 23 is movably connected to a first conductive rod 25;

[0056] A current sensor 27 is provided around the outer periphery of the first conductive rod 25, and a voltage sensor 28 is provided on the side of the flexible connecting piece 23 away from the first conductive rod 25;

[0057] The ends of the first conductive rod 25 and the second conductive rod 29 away from the flexible connecting piece 23 are respectively provided with an outgoing terminal 102 and an incoming terminal 101.

[0058] The second conductive rod 29 is connected to the stationary contact of the vacuum interrupter 26, and the connecting rod 22 is connected to the moving contact of the vibration interrupter 26. The three-phase merging shaft 7 sequentially drives the steering hinge 20, the insulating pull rod 21, and the connecting rod 22 to move, thereby realizing the contact and separation of the moving and stationary contacts in the vacuum interrupter 26, and realizing the conduction and disconnection of the first conductive rod 25 and the second conductive rod 29, thus realizing the opening and closing operation.

[0059] Preferably, the flexible connecting piece 23 is a bent piece, and a connecting block 24 is fixedly provided on its bent portion. A connecting groove is provided on the connecting block 24, and a first conductive rod 25 is movably inserted into the connecting groove. The shape of the connecting groove and the first conductive rod 25 is adapted to each other. The end of the first conductive rod 25 is movably abutted against the side wall of the bent portion of the flexible connecting piece 23 and the side wall of the connecting groove. This application increases the conductive contact area and improves the conductivity by using the irregularly shaped bent piece 23 and connecting block 24.

[0060] Preferably, the vacuum interrupter 26 is a high-performance vacuum interrupter from Shaanxi Baoguang, which can achieve 10,000 cycles of opening and closing.

[0061] Preferably, the opening and closing counter 19 is located at the bottom of the three-phase reclosing shaft 7, and can be either mechanically triggered or non-contact type. Based on a microprocessor or digital circuit, it records opening and closing signals, supports data storage and communication, and can classify and record fault types (such as instantaneous faults and permanent faults), count the number of operations and timestamps. Furthermore, it supports remote monitoring (via SCADA or IoT) to facilitate fault analysis and preventive maintenance.

[0062] Preferably, the electrode post 1 is cast with epoxy resin and covered with silicone rubber to enhance insulation performance. The part of the electrode post 1 with the umbrella skirt 103 is lengthened to increase the creepage distance.

[0063] Preferably, the assembly housing 2 is further provided with a handle 201, a pull ring 202, a fixing ear, and a flight plug 203. The handle 201, pull ring 202, and fixing ear are used for the movement and fixation of this application. The flight plug 203 is internally connected to a controller and / or a counter and other signal sources for data communication.

[0064] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A three-phase recloser based on a permanent magnet operating mechanism, comprising an assembly housing (2) and a three-phase pole (1) disposed on the top of the assembly housing (2), characterized in that: A trip handle (3) is provided on one side of the assembly housing (2). A trip indicator needle (31) is sleeved on the rotating shaft of the trip handle (3). The trip handle (3) is connected to the permanent magnet operating mechanism (5) inside the assembly housing (2). The permanent magnet operating mechanism (5) is connected to the three-phase re-closing shaft (7). The three-phase re-closing shaft (7) is connected to the switch assembly inside the pole post (1). The assembly housing (2) is also equipped with a controller and a circuit breaker counter (19), and the controller is electrically connected to the circuit breaker counter (19) and the permanent magnet operating mechanism (5).

2. The three-phase recloser based on a permanent magnet operating mechanism according to claim 1, characterized in that: The assembly housing (2) has main hinge frames (8) on both sides along its length. The two ends of the three-phase coincident shaft (7) are respectively hinged to the two main hinge frames (8). The lower part of the three-phase coincident shaft (7) is movably connected to a permanent magnet operating mechanism (5) and an oil buffer device (17). The permanent magnet operating mechanism (5) and the oil buffer device (17) are respectively set close to the two main hinge frames (8). The end of the transmission core (6) of the permanent magnet operating mechanism (5) is hinged to the transmission hinge frame (9). The transmission hinge frame (9) is fixed to the bottom of the three-phase over-closing shaft (7). The opening handle (3) is connected to the opening and closing shaft (4). The opening and closing shaft (4) rotates from the width direction of the permanent magnet operating mechanism (5) and is inserted into the permanent magnet operating mechanism (5) and is movably connected to the transmission core (6). The buffer part of the oil buffer device (17) is hinged to the connecting hinge (18), which is fixed to the bottom of the three-phase coincident main shaft (7).

3. The three-phase recloser based on a permanent magnet operating mechanism according to claim 2, characterized in that: The end of the opening and closing shaft (4) is provided with a drive cam, and the outer periphery of the transmission iron core (6) is provided with a drive groove, and the outer periphery of the drive cam abuts against the side wall of the drive groove.

4. The three-phase recloser based on a permanent magnet operating mechanism according to claim 2, characterized in that: The outer periphery of the opening and closing shaft (4) is connected to a first limiting piece (11). A limit switch (10) is fixed on the side of the opening and closing shaft (4) near the oil buffer device (17). A mounting bracket (51) for fixing the permanent magnet operating mechanism (5) is provided on the side of the opening and closing shaft (4) away from the oil buffer device (17). The limiting piece is in contact with the limit switch (10) and the mounting bracket (51). The opening and closing shaft (4) is fitted with a second limiting plate (12) on the side of the permanent magnet operating mechanism (5) relative to the first limiting plate (11). The end of the second limiting plate (12) is hinged with a U-shaped slide (13). The U-shaped slide (13) is connected to the fixed bracket (15) through a buffer spring (14). The fixed bracket (15) is fixed to the side wall of the assembly housing (2). A limiting pin (161) is fixed above the U-shaped slide (13) and the second limiting plate (12).

5. The three-phase recloser based on a permanent magnet operating mechanism according to claim 1, characterized in that: A second pointer (30) is provided on the outside of the assembly housing (2). The second pointer (30) includes a pointer body (301). The rotating shaft of the pointer body (301) rotates through the side wall of the assembly housing (2). A U-shaped linkage bracket (302) is sleeved on the rotating shaft of the pointer body (301). A clamping groove is opened at the end of the U-shaped linkage bracket (302). A connecting rod (303) is slidably arranged in the clamping groove. The connecting rod (303) is connected to the three-phase coincident main shaft (7).

6. The three-phase recloser based on a permanent magnet operating mechanism according to claim 1, characterized in that: The switch assembly includes a steering hinge (20) hinged to the three-phase coincident main shaft (7), the steering hinge (20) is connected to an insulating pull rod (21), the insulating pull rod (21) is connected to a connecting rod (22), the connecting rod (22) is piston-inserted into a vacuum interrupter (26), the top of the vacuum interrupter (26) is connected to a second conductive rod (29), the outer periphery of the connecting rod (22) is fitted with a flexible connecting piece (23), the flexible connecting piece (23) is movably connected to a first conductive rod (25); A current sensor (27) is provided around the outer periphery of the first conductive rod (25), and a voltage sensor (28) is provided on the side of the flexible connecting piece (23) away from the first conductive rod (25); The first conductive rod (25) and the second conductive rod (29) are respectively provided with an outgoing terminal (102) and an incoming terminal (101) at their ends away from the flexible connecting piece (23).

7. The three-phase recloser based on a permanent magnet operating mechanism according to claim 6, characterized in that: The flexible connecting piece (23) is a bent piece, and a connecting block (24) is fixedly provided on its bent part. A connecting groove is provided on the connecting block (24). A first conductive rod (25) is movably inserted in the connecting groove. The shape of the connecting groove and the first conductive rod (25) are adapted. The end of the first conductive rod (25) is movably abutted against the side wall of the bent part of the flexible connecting piece (23) and the side wall of the connecting groove.

8. The three-phase recloser based on a permanent magnet operating mechanism according to claim 1, characterized in that: The opening and closing counter (19) is located at the bottom of the three-phase reclosing shaft (7) and can be either mechanically triggered or non-contact.

9. The three-phase recloser based on a permanent magnet operating mechanism according to claim 1, characterized in that: The pole (1) is cast with epoxy resin and covered with silicone rubber.

10. The three-phase recloser based on a permanent magnet operating mechanism according to claim 1, characterized in that: The assembly housing (2) is also provided with a handle (201), a pull ring (202), a fixing lug, and a flight plug (203).

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