A circuit breaker super-fast tripping permanent magnet operating mechanism

Abstract

The application relates to a circuit breaker super-fast tripping permanent magnet operating mechanism, which is internally provided with a permanent magnet operating module, a super-fast tripping mechanism, a super-fast tripping device and a transmission plate; the permanent magnet operating module is provided with a driving shaft, the transmission plate is provided with a transmission connecting part, the super-fast tripping mechanism comprises a driving arm and a driven arm, the driving shaft, the driving arm, the driven arm and the transmission connecting part are rotationally connected in sequence, and the driving arm is driven to rotate through the super-fast tripping device; a plurality of transmission arms are arranged on the transmission plate, one end of each transmission arm is rotationally connected with the transmission plate through a first sliding shaft, and the other end is rotationally connected with a pull rod led out from the lower end of a fixed sealing pole; a plurality of guide bases are arranged in the mechanism seat body, and horizontal guide grooves and vertical guide grooves are arranged on the guide bases. The super-fast tripping device and the super-fast tripping mechanism are used to make the transmission plate quickly separate from the locking state and rapidly move, the circuit breaker tripping response time is greatly shortened, and the super-fast tripping of a fault can be realized.

Description

Technical Field

[0001] This invention relates to the field of power equipment, specifically to an ultra-fast tripping permanent magnet operating mechanism for circuit breakers. Background Technology

[0002] Solid-insulated pole vacuum circuit breakers possess advantages such as excellent insulation performance, protection against flashover, high mechanical strength, maintenance-free operation, and miniaturization, and have become the standardized mainstream structure for circuit breakers in power grid configurations. Regarding the operating mechanism, this type of circuit breaker typically employs a single permanent magnet operating mechanism. Compared to traditional spring and electromagnetic operating mechanisms, the single permanent magnet operating mechanism offers advantages such as simple structure, fewer parts, less dispersion of action, high reliability, and long service life. Combined with a three-phase linkage transmission structure, it can achieve synchronous operation of the three-phase contacts, thereby effectively ensuring the synchronicity of the circuit breaker's closing and opening.

[0003] However, with the advancement of new power system construction, short-circuit faults, instantaneous ground faults, and load surge faults occur frequently in distribution networks. Therefore, the power grid places extremely high demands on the fault response speed of circuit breakers, typically requiring millisecond-level response. Existing solid-sealed permanent magnet circuit breakers are limited by their inherent transmission structure and tripping drive mode. Their tripping action relies entirely on the energy release of the spring force built into the permanent magnet mechanism, resulting in problems such as long mechanical transmission links, load release lag, and delayed action response. It is difficult for them to achieve faster tripping action and cannot meet the current technical requirements for rapid fault tripping in distribution networks. Summary of the Invention

[0004] The purpose of this invention is to provide a permanent magnet operating mechanism for ultra-fast tripping of circuit breakers. It utilizes an ultra-fast tripping device and an ultra-fast tripping mechanism to enable the transmission plate to quickly disengage from the locked state and move rapidly, thereby significantly shortening the tripping response time of the circuit breaker, especially achieving millisecond-level ultra-fast fault tripping.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A permanent magnet operating mechanism for ultra-fast tripping of a circuit breaker includes a mechanism base with a fixed pole on the upper side. Inside the mechanism base are a permanent magnet operating module, an ultra-fast tripping mechanism, an ultra-fast tripping device, and a transmission plate. The permanent magnet operating module has a drive shaft, and the transmission plate has a transmission connection. The ultra-fast tripping mechanism includes a drive arm and a driven arm. The drive shaft, drive arm, driven arm, and transmission connection are sequentially rotatably connected. When the mechanism is in the closed holding position or the open holding position, the drive shaft, drive arm, and driven arm... The boom is in a mechanical dead point position in a straight line, and the drive boom is driven to rotate by the ultra-fast tripping device; the transmission plate is provided with multiple transmission arms, and one end of the transmission arm is rotatably connected to the transmission plate through a first sliding shaft, and the other end is rotatably connected to the pull rod leading out from the lower end of the corresponding solid-sealing pole through a second sliding shaft; the mechanism base is provided with multiple guide seats, and the guide seats are provided with horizontal guide grooves and vertical guide grooves, the outer end of the first sliding shaft is located in the corresponding horizontal guide groove, and the outer end of the second sliding shaft is located in the corresponding vertical guide groove.

[0007] The permanent magnet operating module includes a module base, and an outer magnetic yoke is provided on the outside of the module base. Inside the module base, a moving iron core, a drive coil, and a stationary iron core are arranged in sequence. A permanent magnet is provided between the stationary iron core and the outer magnetic yoke. A drive shaft is fixed in the middle of the moving iron core. One end of the drive shaft extends to the outside of the module base and is connected to the ultra-fast tripping mechanism, and the other end passes through the stationary iron core. A tripping spring is sleeved on the drive shaft and is located between the moving iron core and the stationary iron core.

[0008] The ultra-fast tripping device includes a top column, an eddy current disk, and a tripping coil. The top column passes through the tripping coil and the eddy current disk from bottom to top and is connected to a limiting plate. The limiting plate is provided with a top head that cooperates with the drive arm.

[0009] The mechanism base is equipped with a buffer on the side away from the ultra-fast tripping mechanism, and the buffer abuts against the transmission plate.

[0010] The lower end of the pull rod is provided with an adapter block, and the adapter block is located on the second sliding shaft at the upper end of the transmission arm.

[0011] When the drive arm adopts a slotted structure, one end of the drive arm is rotatably connected to the drive shaft via a drive hinge shaft, and the other end is rotatably connected to one end of the driven arm via an intermediate hinge shaft. The other end of the driven arm is rotatably connected to the transmission connection part on the transmission plate via a driven hinge shaft. The drive arm is provided with a limiting groove near the drive shaft, and both the end of the drive shaft and the drive hinge shaft are located in the limiting groove. A first torsion spring is provided on the drive hinge shaft to hook and connect with the drive arm.

[0012] When the mechanism is in the closed or open state, the drive shaft, drive arm and driven arm are all on the same straight line. When the mechanism is in the closed state, the drive arm is above the ultra-fast opening device, and when the mechanism is in the open state, the driven arm is above the ultra-fast opening device.

[0013] When the drive arm adopts a hook-type structure, the end of the drive shaft is provided with a concave connecting seat, and the front opening of the connecting seat is rotatably connected to the driven arms on both sides through a central hinge shaft. The driven arm is provided with a sliding driven hinge shaft, and the two ends of the driven hinge shaft are connected to the transmission connection part on the corresponding side. The rear side of the drive arm is located in the connecting seat, and the front side is located between the two driven arms. The middle part of the drive arm is fitted onto the central hinge shaft. A second torsion spring is provided between the central hinge shaft and the driven hinge shaft. The rear end of the drive arm is provided with a limiting block that abuts against the upper surface of the connecting seat. The front end of the drive arm is provided with a hook part that hooks against the driven hinge shaft. The front side of the hook part is provided with a side abutting surface that abuts against the driven hinge shaft. The lower side of the drive arm is provided with a lower abutting surface and a lower recess.

[0014] When the mechanism is in the closed or open state, the drive shaft, drive arm and driven arm are all on the same straight line, and the limiting block abuts against the upper surface of the rear end of the connecting seat, and the side abutting surface abuts against the driven hinge shaft. In addition, in the closed state, the lower abutting surface is located above the ultra-fast opening device, and in the open state, the lower recess is located above the ultra-fast opening device.

[0015] The driven arm is provided with a sliding groove, and the end of the driven hinge shaft passes through the sliding groove on the corresponding side and connects to the transmission connection part.

[0016] The advantages and positive effects of this invention are as follows:

[0017] 1. This invention utilizes the drive shaft of the permanent magnet operating module and the drive arm and driven arm in the ultra-fast tripping mechanism to form a mechanical dead point locking state of the transmission plate. At the same time, the ultra-fast tripping device with eddy current disk and tripping coil drives the drive arm to rotate, so that the drive shaft, drive arm and driven arm can quickly disengage from the above-mentioned mechanical dead point locking state. This allows the transmission plate to move rapidly to achieve tripping. Furthermore, the ultra-fast tripping mechanism and ultra-fast tripping device are located between the permanent magnet operating module and the transmission plate connection, which also greatly shortens the mechanical transmission link, thereby significantly shortening the circuit breaker tripping response time, especially achieving millisecond-level ultra-fast fault tripping.

[0018] 2. After the circuit breaker is tripped, the drive shaft of the permanent magnet operating module and the drive arm and driven arm in the ultra-fast tripping mechanism can return to a mechanical dead-point locked state, aligned in a straight line. Thus, when the permanent magnet operating module drives the circuit breaker to close via the drive shaft, the drive shaft can transmit torque through the drive arm and driven arm to drive the transmission plate to move and close. Furthermore, when there is no power grid fault, the ultra-fast tripping device can be left unactivated as needed. In this case, the mechanical dead-point locked state of the drive shaft, drive arm, and driven arm can meet the requirements of normal tripping and closing operations.

[0019] 3. The ultra-fast tripping mechanism of the present invention can achieve tripping auxiliary driving function regardless of whether it adopts a slotted or hook-type drive arm. When the drive arm adopts a slotted structure, after the drive arm and driven arm are separated from the same straight line under the action of the ultra-fast tripping device, the drive arm and driven arm quickly form an angled bend, which enables the transmission plate to achieve a preliminary rapid tripping action. Subsequently, the first torsion spring on the drive hinge shaft generates a torsion spring force that returns the drive arm to the horizontal direction. This not only restores the drive arm and driven arm to the same straight line position, but also assists in driving the permanent magnet operating module drive shaft to move. When the drive arm adopts a hook-type structure, after the drive arm rotates, the driven hinge shaft is no longer restricted and moves relatively quickly along the slide groove on the driven arm. This can achieve the initial rapid opening action of the transmission plate, thereby enabling the circuit breaker contacts connected to the pull rod to quickly trip and open the circuit. It can also further ensure the accuracy of the movement of the transmission plate connection. In addition to the opening spring in the permanent magnet operating module driving the opening, the second torsion spring between the intermediate hinge shaft and the driven hinge shaft will also drive them to separate again, thereby assisting in driving the drive shaft of the permanent magnet operating module to move. In addition, the hook part of the drive arm and the hook engagement of the driven hinge shaft during opening can also help limit the initial displacement of the transmission plate, so as to avoid the transmission plate moving too rapidly and violently after the drive arm suddenly leaves the dead point and affecting the related structures, thereby ensuring the long-term use of the mechanism.

[0020] 4. Regardless of whether the ultra-fast tripping mechanism of the present invention adopts a slotted or hooked drive arm, the locking state of the ultra-fast tripping device will not be affected even if it is falsely triggered after the mechanism completes the tripping. When the drive arm adopts a slotted structure, the top of the upper end of the ultra-fast tripping device is located in the gap between the two driven arms after the tripping. When the drive arm adopts a hooked structure, the top of the upper end of the ultra-fast tripping device is located in the lower recess of the drive arm after the tripping.

[0021] 5. The transmission plate of the present invention is provided with multiple transmission arms, and one end of each transmission arm is rotatably connected to the transmission plate via a first sliding shaft, and the other end is rotatably connected to a pull rod extending from the lower end of the corresponding solid-sealing pole via a second sliding shaft. The first and second sliding shafts are respectively slidably engaged with the corresponding guide grooves on the corresponding guide seats, thereby ensuring accurate control of the opening and closing action of the mechanism. Furthermore, the design of the cooperation between the two ends of a single transmission arm and the horizontal and vertical guide grooves on the corresponding guide seats can also meet the requirements for rapid opening. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the usage state of the present invention.

[0023] Figure 2 for Figure 1 An enlarged schematic diagram of the present invention.

[0024] Figure 3 for Figure 2 A schematic diagram of an embodiment at point A.

[0025] Figure 4 for Figure 3 Working status diagram of the Chinese embodiment Figure 1 ,

[0026] Figure 5 for Figure 3 Working status diagram of the Chinese embodiment Figure 2 ,

[0027] Figure 6 for Figure 3 Working status diagram of the Chinese embodiment Figure 3 ,

[0028] Figure 7 for Figure 3 Working status diagram of the Chinese embodiment Figure 4 ,

[0029] Figure 8 for Figure 2 Another embodiment of the structure at point A is shown in the schematic diagram.

[0030] Figure 9 for Figure 8 A schematic diagram of the structure of the drive arm.

[0031] Figure 10 for Figure 8 Working status diagram of the Chinese embodiment Figure 1 ,

[0032] Figure 11 for Figure 8 Working status diagram of the Chinese embodiment Figure 2 ,

[0033] Figure 12 for Figure 8 Working status diagram of the Chinese embodiment Figure 3 ,

[0034] Figure 13 for Figure 8 Working status diagram of the Chinese embodiment Figure 4 ,

[0035] Figure 14 for Figure 2 A schematic diagram of the structure of the super-fast tripping device.

[0036] Figure 15 for Figure 2 Enlarged diagram at point B in the middle.

[0037] Figure 16 for Figure 2 Schematic diagram of the structure of the guide seat.

[0038] Figure 17 for Figure 2 A schematic diagram of the permanent magnet operating module.

[0039] Among them, 1 is the permanent magnet operating module, 101 is the mounting base, 102 is the drive shaft, 1021 is the connecting base, 103 is the module base, 1031 is the external magnetic yoke, 104 is the moving iron core, 105 is the permanent magnet, 106 is the stationary iron core, 107 is the drive coil, and 108 is the opening spring; 2 is the ultra-fast opening mechanism, 201 is the drive arm, 2011 is the limiting groove, 2012 is the hook part, 2013 is the limiting block, 2014 is the side abutment surface, 2015 is the lower notch, 2016 is the lower abutment surface, 202 is the driven arm, and 2021 is the slide groove. 2022 is the second torsion spring, 203 is the driving hinge shaft, 204 is the first torsion spring, 205 is the intermediate hinge shaft, and 206 is the driven hinge shaft; 3 is the ultra-fast tripping device, 301 is the top head, 302 is the top column, 303 is the limit plate, 304 is the eddy current disk, 305 is the tripping coil, and 3051 is the protective layer; 4 is the transmission plate, and 401 is the transmission connection part; 5 is the transmission arm, 501 is the second sliding shaft, and 502 is the first sliding shaft; 6 is the buffer; 7 is the guide seat; 701 is the horizontal guide groove, and 702 is the vertical guide groove; 8 is the pull rod, and 801 is the adapter block. Detailed Implementation

[0040] The invention will now be described in further detail with reference to the accompanying drawings.

[0041] like Figures 1-17As shown, the present invention includes a mechanism base, and a fixed-seal pole is provided on the upper side of the mechanism base. The mechanism base contains a permanent magnet operating module 1, an ultra-fast tripping mechanism 2, an ultra-fast tripping device 3, and a transmission plate 4. The permanent magnet operating module 1 is provided with a drive shaft 102, and the transmission plate 4 is provided with a transmission connection part 401. Additionally, as shown... Figures 4-13 As shown, the ultra-fast tripping mechanism 2 includes a drive arm 201 and a driven arm 202, and the drive shaft 102, drive arm 201, driven arm 202, and transmission connection part 401 are rotatably connected in sequence; as shown Figure 4 , Figure 7 , Figure 10 and Figure 13 As shown, when the mechanism of the present invention is in the closed holding position or the open holding position, the drive shaft 102, drive arm 201, and driven arm 202 are in a mechanical dead point position that is in a straight line. The drive arm 201 is driven to rotate by the ultra-fast opening device 3, thereby causing the drive shaft 102, drive arm 201, and driven arm 202 to move out of the mechanical dead point position that is in a straight line. At this time, the drive shaft 102 and the transmission plate 4 move. Figures 1-2 As shown, the transmission plate 4 is provided with multiple transmission arms 5, and as... Figure 15 As shown, one end of the transmission arm 5 is rotatably connected to the transmission plate 4 via a first sliding shaft 502, and the other end is rotatably connected to the pull rod 8 extending from the lower end of the corresponding solid-sealing pole via a second sliding shaft 501; as Figures 1-2 and Figure 16 As shown, the mechanism body is provided with multiple guide seats 7, and each guide seat 7 is provided with a horizontal guide groove 701 and a vertical guide groove 702. The outer end of the first sliding shaft 502 is provided in the corresponding horizontal guide groove 701, and the outer end of the second sliding shaft 501 is provided in the corresponding vertical guide groove 702. The internal mechanism of the solid-sealing pole is a technology known in the art.

[0042] like Figure 17 As shown, the permanent magnet operating module 1 includes a module base 103, and an outer magnetic yoke 1031 is provided on the outside of the module base 103. Inside the module base 103, a moving iron core 104, a drive coil 107, and a stationary iron core 106 are arranged sequentially. A permanent magnet 105 is provided between the stationary iron core 106 and the outer magnetic yoke 1031. A drive shaft 102 is fixed in the middle of the moving iron core 104, with one end extending to the outside of the module base 103 and connecting to the ultra-fast tripping mechanism 2, and the other end passing through the stationary iron core 106. A tripping spring 108 is sleeved on the drive shaft 102, and the tripping spring 108 is located between the moving iron core 104 and the stationary iron core 106. Figure 1 As shown, the mechanism body is provided with a mounting base 101, and the module body 103 is disposed on the mounting base 101.

[0043] When the permanent magnet operating module 1 is working, the magnetic lines of force generated by the permanent magnet 105 form a closed magnetic circuit through the stationary iron core 106, the moving iron core 104, and the outer magnetic yoke 1031, thus stably holding the moving iron core 104 in place. When the present invention needs to open the circuit, the control system controls the drive coil 107 to be energized. According to Ampere's law, the drive coil 107 forms a circular current and generates an electromagnetic field with a defined direction after being energized. The electromagnetic field cancels out the magnetic field of the permanent magnet 105, and the moving iron core 104 is no longer attracted. At this time, the opening spring 108 drives the moving iron core 104 to separate from the stationary iron core 106, thereby realizing the movement of the drive shaft 102 to open the circuit. After the moving iron core 104 moves into place, the control system controls the drive coil 107 to automatically de-energize. When closing is required, the drive coil 107 is energized in reverse and generates an opposite electromagnetic field. This electromagnetic field superimposes with the magnetic field of the permanent magnet 105, enhancing the magnetic force, thereby causing the moving iron core 104 to re-attract and close. After the closing position is achieved, the drive coil 107 is automatically de-energized, and the permanent magnet 105, the outer yoke 1031, etc., re-form a stable magnetic circuit, holding the moving iron core 104 in the closed position. The above working principle is a well-known technology in this field.

[0044] like Figure 14 As shown, the ultra-fast tripping device 3 includes a top post 302, an eddy current disk 304, and a tripping coil 305. The top post 302 passes through the tripping coil 305 and the eddy current disk 304 from bottom to top and is connected to a limiting plate 303. The limiting plate 303 is provided with a top head 301 that cooperates with the drive arm 201 in the ultra-fast tripping mechanism 2. When the tripping coil 305 is energized, it generates an electromagnetic field. When the magnetic flux generated by the electromagnetic field passes through the eddy current disk 304, it generates eddy currents in the eddy current disk 304. Since the direction of the magnetic field generated by the eddy currents in the eddy current disk 304 is opposite to the direction of the electromagnetic field generated by the tripping coil 305, therefore... Figure 5 and Figure 11 As shown, under the action of magnetic field repulsion, the eddy current disk 304 drives the limiting plate 303 and the top head 301 to move upward, thereby driving the drive arm 201 to rotate so that the ultra-fast tripping mechanism 2 no longer restricts the position of the drive shaft 102 and the transmission connection part 401. Figure 14 As shown, a protective layer 3051 may be provided on the outside of the trip coil 305 as needed.

[0045] like Figures 1-2 As shown, a buffer 6 is provided inside the mechanism base on the side away from the ultra-fast tripping mechanism 2, which abuts against the transmission plate 4 to provide a buffering effect. The buffer 6 can be an oil buffer. Figure 15 As shown, the lower end of the pull rod 8 is provided with a transition block 801, and the transition block 801 is provided on the second sliding shaft 501 at the upper end of the transmission arm 5.

[0046] The drive arm 201 in the ultra-fast tripping mechanism 2 can adopt a slotted structure or a hook-type structure as needed.

[0047] Example 1:

[0048] like Figures 3-7 As shown, when the drive arm 201 adopts a slotted structure, the ultra-fast tripping mechanism 2 includes a drive arm 201 and a driven arm 202. One end of the drive arm 201 is rotatably connected to the drive shaft 102 via a drive hinge 203, and the other end is rotatably connected to one end of the driven arm 202 via an intermediate hinge 205. The other end of the driven arm 202 is rotatably connected to the transmission connection part 401 on the transmission plate 4 via a driven hinge 206. A limiting groove 2011 is provided near the drive shaft 102 on the drive arm 201, and both the end of the drive shaft 102 and the drive hinge 203 are located in the limiting groove 2011. A first torsion spring 204 is provided on the drive hinge 203 to hook and connect with the drive arm 201. Figure 4 and Figure 7 As shown, when the mechanism is in the closed or open state, the drive shaft 102, drive arm 201 and driven arm 202 are all on the same straight line. In the closed state, the drive arm 201 is located above the ultra-fast opening device 3, and in the open state, the driven arm 202 is located above the ultra-fast opening device 3.

[0049] The working principle of this embodiment is as follows:

[0050] like Figures 3-7 As shown, the specific working process of this embodiment is as follows:

[0051] One: such as Figure 4 As shown, when the mechanism of the present invention is in the closed position, the drive shaft 102, drive arm 201 and driven arm 202 are all on the same straight line, that is, in the mechanical dead point position. At this time, the drive shaft 102 and the transmission connection part 401 cannot move due to the position limited by the ultra-fast opening mechanism 2.

[0052] Second: such as Figures 5-6 As shown, when the power distribution network detects a fault requiring rapid tripping, the control system energizes the tripping coil 305 in the ultra-fast tripping device 3, causing the top head 301 to rise and drive the drive arm 201 to rotate. This allows the ultra-fast tripping mechanism 2 to quickly release the mechanical dead point state where the drive shaft 102, drive arm 201, and driven arm 202 are locked in the same straight line, and quickly release the mechanical load on the transmission plate 4. Since the drive arm 201 and driven arm 202 quickly form an angled bend, the transmission plate 4 can achieve initial rapid separation, thereby enabling the circuit breaker contacts connected to the pull rod 8 to quickly trip and trip.

[0053] On the other hand, the control system simultaneously energizes the drive coil 107 in the permanent magnet operating module 1 to generate an electromagnetic field. This electromagnetic field cancels out the magnetic field generated by the permanent magnet 105, etc. At this time, the moving iron core 104 no longer attracts and is driven to separate from the stationary iron core 106 by the opening spring 108, thereby driving the drive shaft 102 to move and cooperate to achieve opening. During the opening movement of the drive shaft 102, in addition to the driving force provided by the opening spring 108 in the permanent magnet operating module 1, the first torsion spring 203 on the drive hinge shaft 203 generates a force that restores the drive arm 201 to a horizontal position. That is, it drives the drive arm 201 and the driven arm 202 from the angled state back to a straight state. This also provides an auxiliary driving force to the drive shaft 102, thereby playing an auxiliary driving role for the drive shaft 102.

[0054] Three: such as Figure 7 As shown, after the tripping action is completed, in addition to the drive shaft 102 moving into position, the drive arm 201 returns to a horizontal state through the action of the first torsion spring 204 on the drive hinge shaft 203, and returns to the same straight line state as the drive shaft 102 and the driven arm 202. At this time, the driven arm 202 is located above the ultra-fast tripping device 3, and the top head 301 at the upper end of the ultra-fast tripping device 3 is located between the driven arms 202 on both sides. Even if the ultra-fast tripping device 3 is falsely triggered, it will not affect the locking state of the drive shaft 102, the drive arm 201 and the driven arm 202.

[0055] IV. When closing is required, the control system controls the drive coil 107 in the permanent magnet operating module 1 to be energized, and generates an electromagnetic field in the same direction as the magnetic field of the permanent magnet 105. The magnetic fields are superimposed to increase the magnetic force, thereby causing the moving iron core 104 to re-adsorb and move to achieve closing. During this process, since the drive shaft 102, drive arm 201 and driven arm 202 are in the same straight mechanical dead point position, the drive shaft 102 can drive the transmission plate 4 to move through the drive arm 201 and driven arm 202 to achieve the closing action.

[0056] Example 2:

[0057] like Figures 8-13As shown, when the drive arm 201 adopts a hook-type structure, the ultra-fast tripping mechanism 2 includes a drive arm 201 and a driven arm 202. The end of the drive shaft 102 is provided with a concave connecting seat 1021, and the front opening of the connecting seat 1021 is rotatably connected to the driven arms 202 on both sides through an intermediate hinge shaft 205. The driven arm 202 is provided with a sliding driven hinge shaft 206, and the two ends of the driven hinge shaft 206 are connected to the transmission connection part 401 on the corresponding side. The rear side of the drive arm 201 is located in the connecting seat 1021, and the front side is located between the two driven arms 202. The middle part of the drive arm 201 is fitted onto the intermediate hinge shaft 205. A second torsion spring 2022 is provided between the intermediate hinge shaft 205 and the driven hinge shaft 206. Figures 9-10 As shown, the rear end of the drive arm 201 is provided with a limiting block 2013 that abuts against the upper surface of the connecting seat 1021; the front end of the drive arm 201 is provided with a hook portion 2012 that hooks against the driven hinge shaft 206; the front side of the hook portion 2012 is provided with a side abutting surface 2014 that abuts against the driven hinge shaft 206; the lower side of the drive arm 201 is provided with a lower abutting surface 2016 and a lower recess 2015. Figure 10 and Figure 13 As shown, when the mechanism is in the closed or open state, the drive shaft 102, drive arm 201, and driven arm 202 are all at the dead point position of the same straight line. In the closed state, the lower abutment surface 2016 is located above the ultra-fast opening device 3, and in the open state, the lower recess 2015 is located above the ultra-fast opening device 3. In addition, when the mechanism is in the closed or open state, the limiting block 2013 abuts against the upper surface of the rear end of the connecting seat 1021, and the side abutment surface 2014 abuts against the driven hinge shaft 206.

[0058] like Figure 8 As shown, in this embodiment, the driven arm 202 is provided with a sliding groove 202, and the end of the driven hinge shaft 206 passes through the sliding groove 202 on the corresponding side and is connected to the transmission connection part 401.

[0059] The working principle of this embodiment is as follows:

[0060] like Figures 8-13 As shown, the specific working process of this embodiment is as follows:

[0061] One: such as Figure 10As shown, when the mechanism of the present invention is in the closed position, the drive shaft 102, drive arm 201, and driven arm 202 are all on the same straight line, that is, in the mechanical dead point position. At this time, the drive shaft 102 and the transmission connection part 401 are fixed in position by the ultra-fast opening mechanism 2 and cannot move. The limiting block 2013 at the rear end of the drive arm 201 abuts against the upper surface of the rear end of the connecting seat 1021 and limits it, and the side abutting surface 2014 at the front end of the drive arm 201 abuts against the driven hinge shaft 206 and limits it. In this way, the drive arm 201 can be kept in a horizontal state. At this time, the lower abutting surface 2016 of the drive arm 201 is located above the ultra-fast opening device 3.

[0062] Second: such as Figures 11-12 As shown, when the distribution network detects a fault requiring rapid tripping, the control system energizes the tripping coil 305 in the ultra-fast tripping device 3, causing the top head 301 to rise and drive the drive arm 201 to rotate. This rapidly releases the mechanical dead-point state where the drive shaft 102, drive arm 201, and driven arm 202 are locked in a straight line, and quickly releases the mechanical load on the transmission plate 4, enabling the circuit breaker contacts connected to the pull rod 8 to quickly trip. Simultaneously, the control system energizes the drive coil 107 in the permanent magnet operating module 1 to generate an electromagnetic field. This electromagnetic field cancels out the magnetic field generated by the permanent magnet 105, causing the moving iron core 104 to no longer attract and to separate from the stationary iron core 106 via the tripping spring 108, thereby driving the drive shaft 102 to move and engage in tripping.

[0063] Among them, such as Figure 12 As shown, when the drive arm 201 rotates, the driven hinge shaft 206, being unrestricted, will first move relative to the driven arm 202 along the slide groove 2021 on the driven arm 202. This not only enables the circuit breaker contacts connected to the pull rod 8 to quickly trip and open, but also further ensures the accuracy of the movement of the transmission plate connection part 401. In addition, the driven hinge shaft 206 enters the hook part 2012 at the front end of the drive arm 201, and during the opening movement of the drive shaft 102, in addition to the opening spring 108 in the permanent magnet operating module 1 driving the opening, the second torsion spring 2022 between the intermediate hinge shaft 205 and the driven hinge shaft 206 will also drive them to separate again, thus playing an auxiliary driving role. In addition, while the second torsion spring 2022 separates and moves the intermediate hinge shaft 205 and the driven hinge shaft 206, it can also disengage the driven hinge shaft 206 from the hook part 2012 and return the drive arm 201 to the horizontal state, thereby ensuring that the ultra-fast tripping mechanism 2 can return to the mechanical dead point state.

[0064] Three: such as Figure 13As shown, after the tripping action is completed, the drive shaft 102, drive arm 201 and driven arm 202 return to the mechanical dead point state of the same straight line. At this time, the lower notch 2015 on the lower side of the drive arm 201 is located above the ultra-fast tripping device 3. In this way, even if the ultra-fast tripping device 3 is accidentally triggered, it will not affect the mechanical dead point state of the drive shaft 102, drive arm 201 and driven arm 202.

[0065] Fourth: When closing the circuit is required, the control system energizes the drive coil 107 in the permanent magnet operating module 1, generating an electromagnetic field in the same direction as the magnetic field of the permanent magnet 105. The magnetic fields superimpose to increase the magnetic force, thereby causing the moving iron core 104 to re-attract and move, thus closing the circuit. During this process, since the drive shaft 102, drive arm 201, and driven arm 202 are at the mechanical dead point position in a straight line, the drive shaft 102 can drive the transmission plate 4 to move through the drive arm 201 and driven arm 202 to achieve the closing action. After closing, as... Figure 10 As shown, at this time, the lower contact surface 2016 on the lower side of the drive arm 201 returns to the top of the ultra-fast tripping device 3.

[0066] With the advancement of new power system construction, the power grid has placed extremely high demands on the fault response speed of circuit breakers, typically requiring millisecond-level response. Figure 17 As shown, the existing structure mainly relies on the built-in tripping spring 108 of the permanent magnet operating module 1 after demagnetization to achieve the tripping purpose. Its tripping driving force is singular and the energy release rate is limited. In addition, factors such as rigid linkage of the mechanism, mechanical damping, structural friction, and fatigue deformation and elasticity decay of the spring after long-term operation make it difficult to achieve the above-mentioned millisecond-level ultra-fast tripping requirement for faults. However, the present invention, through the rotation of the aforementioned driving arm 201, causes the driving shaft 102, driving arm 201 and driven arm 202 to quickly disengage from the mechanical dead point state. The mechanical load of the transmission plate 4 is quickly released and a rapid displacement occurs, thereby driving the pull rod 8 to achieve ultra-fast tripping of the circuit breaker contacts. In addition, during the tripping process, the ultra-fast tripping mechanism 2 can also provide auxiliary driving force to drive the driving shaft 102 to move. After the tripping is completed, the driving shaft 102, driving arm 201 and driven arm 202 can return to the mechanical dead point position in a straight line, without affecting the closing operation of the mechanism.

Claims

1. A permanent magnet operating mechanism for ultra-fast tripping of a circuit breaker, characterized in that: The device includes a mechanism base, and a fixed-seal pole is provided on the upper side of the mechanism base. The mechanism base is equipped with a permanent magnet operating module (1), an ultra-fast tripping mechanism (2), an ultra-fast tripping device (3), and a transmission plate (4). The permanent magnet operating module (1) is provided with a drive shaft (102), and the transmission plate (4) is provided with a transmission connection part (401). The ultra-fast tripping mechanism (2) includes a drive arm (201) and a driven arm (202). The drive shaft (102), drive arm (201), driven arm (202), and transmission connection part (401) are rotatably connected in sequence. When the mechanism is in the closed holding position or the open holding position, the drive shaft (102), drive arm (201), and driven arm (202) are in a state of tension. At the mechanical dead point position of the same straight line, the drive arm (201) is driven to rotate by the ultra-fast tripping device (3); the transmission plate (4) is provided with multiple transmission arms (5), and one end of the transmission arm (5) is rotatably connected to the transmission plate (4) through the first sliding shaft (502), and the other end is rotatably connected to the pull rod (8) led out from the lower end of the corresponding solid sealing pole through the second sliding shaft (501); the mechanism seat is provided with multiple guide seats (7), and the guide seats (7) are provided with horizontal guide grooves (701) and vertical guide grooves (702), the outer end of the first sliding shaft (502) is located in the corresponding horizontal guide groove (701), and the outer end of the second sliding shaft (501) is located in the corresponding vertical guide groove (702).

2. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 1, characterized in that: The permanent magnet operating module (1) includes a module base (103), and an outer magnetic yoke (1031) is provided on the outside of the module base (103). Inside the module base (103), a moving iron core (104), a drive coil (107), and a stationary iron core (106) are arranged in sequence. A permanent magnet (105) is provided between the stationary iron core (106) and the outer magnetic yoke (1031). A drive shaft (102) is fixed in the middle of the moving iron core (104), and one end of the drive shaft (102) extends to the outside of the module base (103) and connects to the ultra-fast tripping mechanism (2), while the other end passes through the stationary iron core (106). A tripping spring (108) is sleeved on the drive shaft (102), and the tripping spring (108) is located between the moving iron core (104) and the stationary iron core (106).

3. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 1, characterized in that: The ultra-fast tripping device (3) includes a top column (302), an eddy current disk (304), and a tripping coil (305). The top column (302) passes through the tripping coil (305) and the eddy current disk (304) from bottom to top and is connected to a limiting plate (303). The limiting plate (303) is provided with a top head (301) that cooperates with the drive arm (201).

4. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 1, characterized in that: The mechanism seat is provided with a buffer (6) on the side away from the ultra-fast tripping mechanism (2), and the buffer (6) abuts against the transmission plate (4).

5. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 1, characterized in that: The lower end of the pull rod (8) is provided with a transition block (801), and the transition block (801) is located on the second sliding shaft (501) at the upper end of the transmission arm (5).

6. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 1, characterized in that: When the drive arm (201) adopts a slotted structure, one end of the drive arm (201) is rotatably connected to the drive shaft (102) through the drive hinge shaft (203), and the other end is rotatably connected to one end of the driven arm (202) through the intermediate hinge shaft (205). The other end of the driven arm (202) is rotatably connected to the transmission connection part (401) on the transmission plate (4) through the driven hinge shaft (206). The drive arm (201) is provided with a limiting groove (2011) near the drive shaft (102), and the end of the drive shaft (102) and the drive hinge shaft (203) are both provided in the limiting groove (2011). The drive hinge shaft (203) is provided with a first torsion spring (204) that is hooked and connected to the drive arm (201).

7. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 6, characterized in that: When the mechanism is in the closed or open state, the drive shaft (102), drive arm (201) and driven arm (202) are all on the same straight line. When the mechanism is in the closed state, the drive arm (201) is above the ultra-fast opening device (3), and when the mechanism is in the open state, the driven arm (202) is above the ultra-fast opening device (3).

8. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 1, characterized in that: When the drive arm (201) adopts a hook-type structure, the end of the drive shaft (102) is provided with a concave connecting seat (1021), and the front opening of the connecting seat (1021) is rotatably connected to the driven arms (202) on both sides through the intermediate hinge shaft (205). The driven arm (202) is provided with a sliding driven hinge shaft (206), and the two ends of the driven hinge shaft (206) are connected to the transmission connection part (401) on the corresponding side. The rear side of the drive arm (201) is located in the connecting seat (1021), and the front side is located between the two driven arms (202). The middle part of the drive arm (201) is fitted into the connecting seat (1021). On the intermediate hinge shaft (205); a second torsion spring (2022) is provided between the intermediate hinge shaft (205) and the driven hinge shaft (206); a limiting block (2013) is provided at the rear end of the drive arm (201) to abut against the upper surface of the connecting seat (1021); a hook part (2012) is provided at the front end of the drive arm (201) to hook against the driven hinge shaft (206); a side abutting surface (2014) is provided on the front side of the hook part (2012) to abut against the driven hinge shaft (206); a lower abutting surface (2016) and a lower recess (2015) are provided on the lower side of the drive arm (201).

9. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 8, characterized in that: When the mechanism is in the closed or open state, the drive shaft (102), drive arm (201) and driven arm (202) are all on the same straight line, and the limit block (2013) abuts against the upper surface of the rear end of the connecting seat (1021) and the side abutting surface (2014) abuts against the driven hinge shaft (206). In addition, when the mechanism is in the closed state, the lower abutting surface (2016) is located above the ultra-fast opening device (3), and when the mechanism is in the open state, the lower notch (2015) is located above the ultra-fast opening device (3).

10. The circuit breaker ultra-fast tripping permanent magnet operating mechanism according to claim 8, characterized in that: The driven arm (202) is provided with a slide groove (202), and the end of the driven hinge shaft (206) passes through the slide groove (202) on the corresponding side and is connected to the transmission connection part (401).

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