A phase-controlled circuit breaker and its emergency tripping device

Abstract

The present invention relates to the technical field of circuit breaker opening, and in particular to a phase-controlled circuit breaker and an emergency opening device thereof. The emergency opening device of the phase-controlled circuit breaker comprises: a mounting mechanism, a torque transmission mechanism and an opening mechanism, wherein the mounting mechanism is fixedly mounted on the frame of the phase-controlled circuit breaker, and the torque transmission mechanism is arranged on the mounting mechanism for receiving and transmitting torque force; the opening mechanism is transmission-connected with the torque transmission mechanism, and the opening mechanism comprises an opening component corresponding to the output shaft of the permanent magnet mechanism in the phase-controlled circuit breaker, and the opening component drives the output shaft of the permanent magnet mechanism to move linearly in the vertical direction toward the three-phase splitting direction of the permanent magnet mechanism under the action of the torque transmission mechanism, so as to realize the three-phase synchronous opening of the phase-controlled circuit breaker; the torque transmission mechanism comprises a reset component, which is used to control the position of the opening component before the phase-controlled circuit breaker performs the three-phase synchronous opening and to reset it after the three-phase synchronous opening, so that the phase-controlled circuit breaker can perform the phase-splitting operation during normal operation.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker opening, and in particular to a phase-controlled circuit breaker and an emergency opening device thereof. Background Art

[0002] Phase-controlled circuit breakers are high-voltage AC circuit breakers that are pre-set to operate at different inter-pole phases. They use a phase-splitting driven permanent magnet mechanism, which can achieve inrush-free closing of capacitor banks, improve power quality, reduce harmonic pollution, reduce the impact on the power grid during switching, and reduce damage to primary equipment. They have good operating benefits and have contributed to the construction of smart grids. At present, phase-controlled circuit breakers using permanent magnet mechanisms have been promoted and applied in power grid systems.

[0003] At present, in response to the actual use requirements of the power grid, many switch manufacturers have designed a synchronous drive device integrated with the transmission mechanism, so that the closing and opening of the circuit breaker are naturally in a synchronous state. However, this design, on the one hand, has a complex structure and many transmission components, and cannot well meet the synchronization problem of rapid opening; on the other hand, it cannot meet the switching requirements of phase-controlled circuit breakers based on permanent magnet mechanisms: 1) When closing the phase-controlled circuit, the phase-splitting action that meets the predetermined inter-pole operation requirements is realized; 2) When opening the circuit in an emergency, a three-phase synchronous opening method needs to be adopted, and the synchronization characteristics of the three-phase opening need to be guaranteed. Summary of the invention

[0004] The object of the present invention is to provide an emergency tripping device for a phase-controlled circuit breaker to solve the problem in the prior art that when the emergency tripping device is applied to a phase-controlled circuit breaker, it cannot simultaneously realize the phase-splitting operation during normal operation of the phase-controlled circuit breaker and meet the synchronization characteristics of three-phase tripping.

[0005] In order to solve the above problems, the present invention proposes an emergency tripping device for a phase-controlled circuit breaker, and the technical solution adopted is:

[0006] An emergency tripping device for a phase-controlled circuit breaker comprises a mounting mechanism, a torque transmission mechanism and a tripping mechanism, wherein the mounting mechanism is fixedly mounted on a frame of the phase-controlled circuit breaker, the torque transmission mechanism is arranged on the mounting mechanism and is used to receive and transmit torque force; the tripping mechanism is transmission-connected with the torque transmission mechanism, the tripping mechanism comprises a tripping component corresponding to an output shaft of a permanent magnet mechanism in the phase-controlled circuit breaker, the tripping component simultaneously drives the output shaft of the permanent magnet mechanism to move linearly in the vertical direction toward the three-phase splitting direction of the permanent magnet mechanism under the action of the torque transmission mechanism, so as to realize the three-phase synchronous tripping of the phase-controlled circuit breaker; the torque transmission mechanism comprises a reset component, which is used to control the position of the tripping component before the phase-controlled circuit breaker performs the three-phase synchronous tripping and to reset it after the three-phase synchronous tripping, so that the phase-controlled circuit breaker can perform the phase splitting operation during normal operation.

[0007] Furthermore, the opening component includes an opening crank arm arranged on the opening mechanism and an opening stop pin arranged on the output shaft of the permanent magnet mechanism, the opening stop pin is located between the opening crank arm and the three-phase split of the permanent magnet mechanism, the opening crank arm drives the output shaft of the permanent magnet mechanism to move linearly along the up and down directions toward the three-phase split of the permanent magnet mechanism through the opening stop pin to realize the three-phase synchronous opening of the phase-controlled circuit breaker; and a gap is provided between the opening crank arm and the opening stop pin, and the gap is provided for the output shaft of the permanent magnet mechanism to move linearly along the up and down directions away from the three-phase split of the permanent magnet mechanism to realize the phase-split operation when the phase-controlled circuit breaker is working normally.

[0008] Furthermore, the opening mechanism also includes a linkage shaft and a driving crank arm, the opening crank arm and the driving crank arm are arranged back to back on the linkage shaft, the driving crank arm is connected to the torque transmission mechanism and drives the linkage shaft to rotate, and the opening crank arm rotates in the same direction and angle under the action of the linkage shaft to realize the three-phase synchronous opening of the phase-controlled circuit breaker and the resetting of the opening crank arm.

[0009] Furthermore, the torque transmission mechanism also includes a switch-off shaft and a switch-off transmission component transmission-connected thereto, the switch-off shaft is rotatably mounted on the mounting mechanism for receiving external torque force and providing torque force, and the switch-off transmission component is transmission-connected to the driving crank arm.

[0010] Furthermore, the opening switch transmission component includes a rotating crank arm and a connecting rod, the rotating crank arm is fixedly connected to the opening switch shaft, the connecting rod is transmission-connected to the driving crank arm, the rotating crank arm has relatively arranged arc surfaces, the connecting rod passes through between the relatively arranged arc surfaces along the up and down directions and forms extrusion, and the rotating crank arm rotates around the opening switch shaft under the action of the opening switch shaft while driving the connecting rod to move upward along the up and down directions to achieve simultaneous opening of the three phases.

[0011] Furthermore, the mounting mechanism includes a connecting mounting bent plate and a fixed mounting bent plate, the connecting mounting bent plate and the fixed mounting bent plate are provided with a first connecting hole, the rotating crank arm passes through the first connecting hole of the connecting mounting bent plate and the fixed mounting bent plate and rotates relative to the first connecting hole.

[0012] Furthermore, the fixed mounting bent plate has a first mounting plate arranged opposite to each other in the horizontal direction and a second mounting plate arranged opposite to each other in the vertical direction, and the rotating crank arm is simultaneously arranged between the first mounting plate arranged opposite to each other and the second mounting plate arranged opposite to each other, and the first connecting hole is arranged on the first mounting plate for passing through the rotating crank arm; the second mounting plate is provided with a second connecting hole for passing through the connecting rod, so that the connecting rod passes through the second connecting hole and the rotating crank arm simultaneously in the up and down directions.

[0013] Furthermore, the reset component is a reset spring arranged between the rotating crank arm and the second mounting plate. After the rotating crank arm drives the connecting rod to move upward along the up-down direction, the reset spring drives the rotating crank arm to rotate around the opening switch shaft while driving the connecting rod to move downward along the up-down direction, so that the opening switch crank arm is reset.

[0014] Furthermore, the emergency opening device also includes an interlocking mechanism, which includes a connecting plate and interlocking crank arms hinged at both ends of the connecting plate, one of the interlocking crank arms is fixedly connected to the opening shaft, and the other interlocking crank arm is connected to the propulsion mechanism in the phase-controlled circuit breaker.

[0015] The present invention also provides a phase-controlled circuit breaker, comprising the emergency opening device of the phase-controlled circuit breaker as described above.

[0016] Beneficial effects: The present invention is an improved invention. The present invention transmits torque force by setting a torque transmission mechanism and drives the output shaft of the permanent magnet mechanism to move linearly in the vertical direction toward the three-phase separation direction of the permanent magnet mechanism by driving the opening component, so as to realize the opening of the three-phase permanent magnet mechanism and ensure the circuit breaker to realize the three-phase synchronous opening. At the same time, a reset component is set in the torque transmission mechanism, and the position of the opening component before the phase-controlled circuit breaker performs the three-phase synchronous opening is controlled under the action of the reset component, so that the phase-controlled circuit breaker can perform the phase-splitting operation during normal operation. At the same time, after the three-phase synchronous opening, the reset component controls the opening component to reset, so that the phase-controlled circuit breaker can also perform the phase-splitting operation during normal operation after the emergency opening. The emergency opening device of the phase-controlled circuit breaker of the present invention realizes the phase-splitting action that meets the predetermined inter-pole operation requirements in different periods when the phase control is closed; in the emergency opening, a three-phase synchronous opening mode is adopted, and the synchronization characteristics of the three-phase opening are guaranteed. When it is applied to the phase-controlled circuit breaker, it can simultaneously realize the phase-splitting operation during normal operation of the phase-controlled circuit breaker and meet the synchronization characteristics of the three-phase opening.

[0017] The opening component includes an opening crank arm arranged on the opening mechanism and an opening stop pin arranged on the output shaft of the permanent magnet mechanism, the opening stop pin is located between the opening crank arm and the three-phase split of the permanent magnet mechanism, the opening crank arm drives the output shaft of the permanent magnet mechanism to move linearly along the up and down directions toward the three-phase split of the permanent magnet mechanism through the opening stop pin to realize the three-phase synchronous opening of the phase-controlled circuit breaker; and a gap is provided between the opening crank arm and the opening stop pin, the gap is for the output shaft of the permanent magnet mechanism to move linearly along the up and down directions away from the three-phase split of the permanent magnet mechanism to realize the phase-split operation when the phase-controlled circuit breaker is working normally, and the structure is simple and easy to operate.

[0018] The opening mechanism also includes a linkage shaft and a driving crank arm. The opening crank arm and the driving crank arm are arranged on the linkage shaft in back to back relation. The driving crank arm is connected to the torque transmission mechanism and drives the linkage shaft to rotate. The opening crank arm rotates in the same direction and at the same angle under the action of the linkage shaft to realize the three-phase synchronous opening of the phase-controlled circuit breaker and the resetting of the opening crank arm, so as to facilitate the simultaneous driving of the output shaft of the permanent magnet mechanism to move linearly in the up and down directions toward the three-phase separation direction of the permanent magnet mechanism to realize the three-phase synchronous opening of the phase-controlled circuit breaker.

[0019] The torque transmission mechanism also includes a switch-off shaft and a switch-off transmission component that is transmission-connected thereto. The switch-off shaft is rotatably mounted on the mounting mechanism for receiving external torque force and providing torque force. The switch-off transmission component is transmission-connected to the driving crank arm to facilitate connecting the torque transmission mechanism with the mounting mechanism and receiving external force and providing torque force.

[0020] The fixed mounting bent plate comprises a first mounting plate opposite to each other in the horizontal direction and a second mounting plate opposite to each other in the vertical direction. The rotating crank arm is simultaneously arranged between the first mounting plate opposite to each other and the second mounting plate opposite to each other. The first connecting hole is arranged on the first mounting plate for passing through the rotating crank arm. The second mounting plate is provided with a second connecting hole for passing through the connecting rod, so that the connecting rod passes through the second connecting hole and the rotating crank arm simultaneously along the up and down directions, thereby strengthening the fixation of the connecting rod along the up and down directions, so as to better realize the linear movement of the connecting rod along the up and down directions.

[0021] The reset component is a reset spring arranged between the rotating crank arm and the second mounting plate. After the rotating crank arm drives the connecting rod to move upward along the up-down direction, the reset spring drives the rotating crank arm to rotate around the opening switch shaft while driving the connecting rod to move downward along the up-down direction, so that the opening switch crank arm is reset. The resetting of the opening switch crank arm can be simply and effectively achieved by setting the position of the reset spring.

[0022] The emergency opening device also includes an interlocking mechanism, which includes a connecting plate and interlocking crank arms hinged at both ends of the connecting plate, wherein one interlocking crank arm is fixedly connected to the opening shaft, and the other interlocking crank arm is connected to the propulsion mechanism in the phase-controlled circuit breaker, so that the propulsion mechanism and the emergency opening device are interlocked. The propulsion mechanism can use the interlocking mechanism to enable the emergency opening device to achieve a three-phase synchronous opening operation, so that the circuit breaker is in a three-phase opening position when the trolley is pushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an emergency tripping device in Embodiment 1 of an emergency tripping device for a phase-controlled circuit breaker of the present invention;

[0024] Figure 2is a schematic structural diagram of a linkage shaft of an emergency trip device in Embodiment 2 of an emergency trip device of a phase-controlled circuit breaker of the present invention;

[0025] Figure 3 is a front view of a structural principle diagram of a phase-controlled circuit breaker in Embodiment 1 of the phase-controlled circuit breaker of the present invention;

[0026] Figure 4 It is a right view of the structural principle diagram of the phase-controlled circuit breaker in Embodiment 1 of the phase-controlled circuit breaker of the present invention;

[0027] In the figure, 1. emergency opening device, 11. opening crank arm, 12. opening stop pin, 13. linkage shaft, 14. driving crank arm, 15. opening shaft, 16. rotating crank arm, 17. connecting rod, 18. connecting and installing bent plate, 19. fixed installing bent plate, 101. tension spring, 102. bearing, 103. driving shaft, 2. frame, 3. interlocking mechanism, 31. interlocking crank arm, 32. connecting plate, 4. three-phase split of permanent magnet mechanism, 41. output shaft of permanent magnet mechanism, 5. propulsion mechanism, 6. conductive circuit. DETAILED DESCRIPTION

[0028] As cited in the background art, in the prior art, when the emergency opening device is applied to the phase-controlled circuit breaker, it is not possible to simultaneously realize the phase-splitting operation during normal operation of the phase-controlled circuit breaker and meet the synchronization characteristics of three-phase opening. Therefore, the present invention provides an emergency tripping device 1 of a phase-controlled circuit breaker, comprising a mounting mechanism, a torque transmission mechanism and a tripping mechanism, wherein the mounting mechanism is fixedly mounted on a frame 2 in the phase-controlled circuit breaker, and is used to mount the emergency tripping device 1 on the frame 2; the torque transmission mechanism is arranged on the mounting mechanism, and is used to receive and transmit torque force; the tripping mechanism is transmission-connected with the torque transmission mechanism, and is used to receive torque force and realize tripping operation; the tripping mechanism comprises a tripping component corresponding to the output shaft 41 of the permanent magnet mechanism in the phase-controlled circuit breaker, and the tripping component drives the output shaft 41 of the permanent magnet mechanism to move linearly in the up and down directions toward the three-phase split 4 of the permanent magnet mechanism under the action of the torque transmission mechanism, so as to realize the three-phase synchronous tripping of the phase-controlled circuit breaker; the torque transmission mechanism comprises a reset component, and under the action of the reset component, the position of the tripping component is controlled before the phase-controlled circuit breaker performs the three-phase synchronous tripping, so that the phase-controlled circuit breaker can perform the phase-splitting operation in normal operation; at the same time, after the three-phase synchronous tripping, the reset component controls the tripping component to be reset, so that the phase-controlled circuit breaker can also perform the phase-splitting operation in normal operation after the emergency tripping. The emergency opening device 1 of the phase-controlled circuit breaker of the present invention realizes phase-splitting action that meets the predetermined requirements of different phase operation between poles during phase-controlled closing; during emergency opening, a three-phase synchronous opening mode is adopted, and the synchronization characteristics of the three-phase opening are guaranteed.

[0029] Specific embodiment 1 of the emergency opening device of the phase-controlled circuit breaker of the present invention:

[0030] In this embodiment, Figure 1 , 2 As shown in , 3, the emergency opening device 1 of the phase-controlled circuit breaker includes: a mounting mechanism, a torque transmission mechanism and an opening mechanism, the mounting mechanism is fixedly mounted on a frame 2 in the phase-controlled circuit breaker, the torque transmission mechanism is arranged on the mounting mechanism, and the opening mechanism is transmission-connected with the torque transmission mechanism; the opening mechanism includes an opening component corresponding to the output shaft 41 of the permanent magnet mechanism in the phase-controlled circuit breaker, and the torque transmission mechanism includes a reset component. When emergency opening is not required, the reset component controls the position of the opening component before the phase-controlled circuit breaker performs three-phase synchronous opening, so that the phase-controlled circuit breaker can perform phase-splitting operations during normal operation; during emergency opening, the mounting mechanism fixes the emergency opening device 1 on the frame 2, and the torque transmission mechanism receives external force and transmits torque force, which controls the opening component on the opening mechanism and drives the permanent magnet mechanism output shaft 41 to move linearly along the up and down directions toward the three-phase split 4 of the permanent magnet mechanism, so as to realize the three-phase synchronous opening of the phase-controlled circuit breaker; after the emergency opening is completed, the reset component in the torque transmission mechanism controls the opening component to reset, that is, the reset component controls the opening component to return to the position before the phase-controlled circuit breaker performs three-phase synchronous opening, so that the permanent magnet mechanism output shaft 41 can move linearly along the up and down directions away from the three-phase split 4 of the permanent magnet mechanism, and the phase-controlled circuit breaker can perform phase-splitting operations during normal operation.

[0031] In this embodiment, the opening switch component includes an opening switch crank arm 11 arranged on the opening switch mechanism and an opening switch stop pin 12 arranged on the permanent magnet mechanism output shaft 41. The opening switch crank arm 11 has relatively arranged brake arms extending in the up and down directions. The permanent magnet mechanism output shaft 41 passes through the relatively arranged brake arms. The opening switch stop pin 12 is located between the opening switch crank arm 11 and the permanent magnet mechanism three-phase split 4. The opening switch stop pin 12 has relatively arranged stop pins corresponding to the relatively arranged brake arms, and a gap is arranged between the opening switch crank arm 11 and the opening switch stop pin 12. When the emergency opening device 1 is not in use, a gap is set between the opening arm 11 and the opening stop pin 12, so that the phase-controlled circuit breaker can perform phase-splitting operation during normal operation; when emergency opening is required, the opening arm 11 moves toward the opening stop pin 12, and drives the opening stop pin 12 to drive the permanent magnet mechanism output shaft 41 to move linearly along the up and down directions toward the three-phase split 4 of the permanent magnet mechanism, so as to realize the three-phase synchronous opening of the phase-controlled circuit breaker; after the emergency opening is completed, the opening arm 11 moves away from the opening stop pin 12 and returns to its original position under the control of the resetting component. Since a gap is set between the opening arm 11 and the opening stop pin 12, the gap allows the permanent magnet mechanism output shaft 41 to move linearly along the up and down directions away from the three-phase split 4 of the permanent magnet mechanism to realize the phase-splitting operation during normal operation of the phase-controlled circuit breaker.

[0032] In other embodiments, the opening switch crank arm 11 has a single brake arm extending in the up and down direction, the permanent magnet mechanism output shaft 41 is arranged along the up and down direction corresponding to the single brake arm, the opening switch stop pin 12 is located between the opening switch crank arm 11 and the permanent magnet mechanism three-phase split 4, the opening switch stop pin 12 has a single stop pin corresponding to the single brake arm, and a gap is arranged between the opening switch crank arm 11 and the opening switch stop pin 12.

[0033] Specific embodiment 2 of the emergency opening device of the phase-controlled circuit breaker of the present invention:

[0034] Based on the technical concept of the present invention described above, or based on the specific embodiment of the present invention described above, another embodiment is provided below.

[0035] In this embodiment, Figure 1 , 2 As shown, the opening mechanism also includes a linkage shaft 13 and a driving crank arm 14. The linkage shaft 13 includes a bearing 102 and a driving shaft 103. The opening crank arm 11 and the driving crank arm 14 are arranged on the linkage shaft 13 in back to back relation, that is, the opening crank arm 11 is arranged on a side close to the output shaft 41 of the permanent magnet mechanism, and the driving crank arm 14 is arranged on a side away from the output shaft 41 of the permanent magnet mechanism. The driving crank arm 14 is connected to the torque transmission mechanism and drives the linkage shaft 13 to rotate. The opening crank arm 11 rotates in the same direction and at the same angle under the action of the linkage shaft 13 to realize the three-phase synchronous opening of the phase-controlled circuit breaker and the resetting of the opening crank arm 11. During emergency opening, the driving crank arm 14 drives the linkage shaft 13 to rotate counterclockwise toward the direction of the permanent magnet mechanism output shaft 41 under the action of the torque transmission mechanism, thereby driving the opening crank arm 11 to rotate counterclockwise and approach the opening stop pin 12, and drives the permanent magnet mechanism output shaft 41 to move downward through the opening stop pin 12, thereby realizing the three-phase synchronous opening of the phase-controlled circuit breaker; after the emergency opening is completed, the driving crank arm 14 drives the linkage shaft 13 to rotate clockwise toward the direction of the permanent magnet mechanism output shaft 41 under the action of the resetting component in the torque transmission mechanism, thereby driving the opening crank arm 11 to rotate clockwise away from the opening stop pin 12, thereby realizing the resetting of the opening crank arm 11.

[0036] Specific embodiment 3 of the emergency opening device of the phase-controlled circuit breaker of the present invention:

[0037] Based on the technical concept of the present invention described above, or based on the specific embodiment of the present invention described above, another embodiment is provided below.

[0038] In this embodiment, Figure 1 , 2As shown, the torque transmission mechanism also includes a switch-off rotating shaft 15 and a switch-off transmission component connected thereto in a transmission manner. The switch-off rotating shaft 15 is rotatably mounted on the mounting mechanism for receiving torque external force and providing torque force. The switch-off transmission component is connected in a transmission manner to the driving crank arm 14. The switch-off transmission component includes a rotating crank arm 16 and a connecting rod 17. The rotating crank arm 16 is fixedly connected to the switch-off rotating shaft 15. The connecting rod 17 is connected in a transmission manner to the driving crank arm 14. The rotating crank arm 16 has arcuate surfaces arranged opposite to each other. The connecting rod 17 passes through the arcuate surfaces arranged opposite to each other in the up-down direction and forms an extrusion. When the switch-off rotating shaft 15 is used for emergency switch-off, the switch-off rotating shaft 15 rotates counterclockwise, and the rotating crank arm 16 rotates around the switch-off rotating shaft 15 under the action of the switch-off rotating shaft 15, and at the same time drives the connecting rod 17 to move upward in the up-down direction, thereby driving the linkage shaft 13 to rotate by the driving crank arm 14 to realize the simultaneous switch-off of the three phases.

[0039] Specific embodiment 4 of the emergency opening device of the phase-controlled circuit breaker of the present invention:

[0040] Based on the technical concept of the present invention described above, or based on the specific embodiment of the present invention described above, another embodiment is provided below.

[0041] In this embodiment, Figure 1 , 2 As shown, the installation mechanism includes a connecting installation bent plate 18 and a fixed installation bent plate 19, both of which are fixedly installed on the frame 2, and a first connecting hole is provided on the connecting installation bent plate 18 and the fixed installation bent plate 19, and the rotating crank arm 16 passes through the first connecting hole of the connecting installation bent plate 18 and the fixed installation bent plate 19, so as to realize the installation of the torque transmission mechanism. Among them, the fixed installation bent plate 19 has a first installation plate arranged oppositely in the horizontal direction and a second installation plate arranged oppositely in the vertical direction, and the rotating crank arm 16 is simultaneously arranged between the first installation plate arranged oppositely and the second installation plate arranged oppositely, and the first connecting hole is arranged on the first installation plate, which is used to pass through the rotating crank arm 16, that is, the rotating crank arm 16 passes through the first connecting hole on the connecting installation bent plate 18 and the first connecting hole on the first installation plate on the fixed installation bent plate 19; the second installation plate is provided with a second connecting hole, which is used to pass through the connecting rod 17, so that the connecting rod 17 passes through the second connecting hole and the rotating crank arm 16 simultaneously along the up and down directions, so as to facilitate the further fixing of the connecting rod 17.

[0042] Specific embodiment 5 of the emergency opening device of the phase-controlled circuit breaker of the present invention:

[0043] Based on the technical concept of the present invention described above, or based on the specific embodiment of the present invention described above, another embodiment is provided below.

[0044] In this embodiment, Figure 1 , 2As shown, the reset component is configured as a reset spring disposed between the rotating crank arm 16 and the second mounting plate. After the rotating crank arm 16 drives the connecting rod 17 to move upward in the up-down direction to realize the simultaneous opening of the three phases, the reset component drives the rotating crank arm 16 to rotate around the opening rotating shaft 15 while driving the connecting rod 17 to move downward in the up-down direction, so that the opening crank arm 11 is reset. In this embodiment, the reset spring is a tension spring 101, which is disposed between the lower end of the rotating crank arm 16 and the second mounting plate at the lower end of the fixed mounting bent plate 19. After the rotating crank arm 16 drives the connecting rod 17 to move upward in the up-down direction to realize the simultaneous opening of the three phases, the tension spring 101 drives the rotating crank arm 16 to rotate clockwise around the opening rotating shaft 15 while driving the connecting rod 17 to move downward in the up-down direction, so that the opening crank arm 11 is reset.

[0045] In other embodiments, the reset spring is a compression spring, which is arranged between the upper end of the rotating crank arm 16 and the second mounting plate at the upper end of the fixed mounting bent plate 19. After the rotating crank arm 16 drives the connecting rod 17 to move upward along the up-down direction to realize the simultaneous opening of the three phases, the compression spring drives the rotating crank arm 16 to rotate clockwise around the opening shaft 15 while driving the connecting rod 17 to move downward along the up-down direction, so that the opening crank arm 11 is reset.

[0046] Specific embodiment 6 of the emergency opening device of the phase-controlled circuit breaker of the present invention:

[0047] Based on the technical concept of the present invention described above, or based on the specific embodiment of the present invention described above, another embodiment is provided below.

[0048] In this embodiment, Figure 1 , 2 As shown, the emergency opening device 1 also includes an interlocking mechanism 3, which includes a connecting plate 32 and interlocking crank arms 31 hinged at both ends of the connecting plate 32, wherein one interlocking crank arm 31 is fixedly connected to the opening shaft 15, and the other interlocking crank arm 31 is used to connect to the propulsion mechanism 5 in the phase-controlled circuit breaker.

[0049] The working process of the emergency tripping device 1 using the phase-controlled circuit breaker of the present invention is as follows:

[0050] First, under normal working conditions, the position of the opening arm 11 is controlled by the tension spring 101, so that there is a gap between the opening arm 11 and the opening stop pin 12, ensuring that the closing and opening actions of the circuit breaker are not affected, meeting the normal working requirements, that is, achieving normal phase-controlled switching;

[0051] Secondly, when emergency opening is required, the propulsion mechanism 5 is interlocked with the emergency opening device 1, and the propulsion mechanism 5 can drive the emergency opening device 1 through the interlocking crank arm 31 to realize the three-phase synchronous opening operation, so that when the trolley is pushed, the circuit breaker is in the three-phase opening position;

[0052] Then, the opening switch shaft 15 is subjected to the torque force of the external force, so that the opening switch shaft 15 rotates counterclockwise, and then drives the turning arm 16 to rotate counterclockwise, and the connecting rod 17 moves upward along the vertical direction, and at the same time, the tension spring 101 is deformed by the tension; the connecting rod 17 drives the linkage shaft 13 to rotate counterclockwise by driving the turning arm 14 and drives the opening switch turning arm 11 to rotate counterclockwise, and the opening switch turning arm 11 moves close to the opening switch stop pin 12, and drives the permanent magnet mechanism output shaft 41 to move linearly along the vertical direction toward the three-phase split 4 of the permanent magnet mechanism, so as to realize the opening of the three-phase permanent magnet mechanism, and ensure that the circuit breaker realizes the three-phase synchronous opening;

[0053] Finally, after the three-phase permanent magnet mechanism is opened, the torque force disappears, the tension spring 101 rebounds, and the tension spring 101 drives the rotating crank arm 16 to rotate clockwise around the opening shaft 15 while driving the connecting rod 17 to move downward in the up and down direction, so that the opening crank arm 11 moves away from the opening stop pin 12 to achieve reset, so that the phase-controlled circuit breaker can perform phase separation operation during normal operation.

[0054] Specific embodiment 1 of the phase-controlled circuit breaker of the present invention:

[0055] In this embodiment, Figure 3 , 4 As shown, the phase-controlled circuit breaker includes a conductive circuit 6, a frame 2, the above-mentioned emergency opening device 1, a three-phase split body 4 of a permanent magnet mechanism and a propulsion mechanism 5, which satisfies the phase-controlled switching of capacitor banks and has an emergency three-phase synchronous opening function. Among them, the conductive circuit 6, the sealed vacuum arc extinguishing chamber and the conductive block, and the built-in insulating pull rod realize the opening and closing of the circuit under the drive of the three-phase split 4 of the permanent magnetic mechanism; the frame 2 is the assembly basis, and the conductive circuit 6, the three-phase split 4 of the permanent magnetic mechanism, the emergency trip device 1, the propulsion mechanism 5 and other components are fixed to it as a whole; the three-phase split 4 of the permanent magnetic mechanism is a phase-by-phase operation, a total of three, connected to the conductive circuit 6 through the output shaft 41 of the permanent magnetic mechanism, straight up and down, to ensure that the three phases act according to the control logic and realize the voltage zero closing; the emergency trip device 1 is fixed on the frame 2 by connecting the installation bent plate 18 and the fixed installation bent plate 19, and the reset spring is used to ensure that there is enough clearance between the trip arm 11 and the trip stop pin 12 to realize normal phase control switching, and at the same time, under the drive of external force, realize the emergency three-phase synchronous trip. The propulsion mechanism 5 can be manually or electrically operated to realize the conversion of the trolley between the test position and the working position; the emergency trip device 1 realizes the interlocking requirements during the propulsion process through the interlocking mechanism 3.

[0056] The specific working process of the phase-controlled circuit breaker is:

[0057] First, the emergency trip device 1 is fixed on the frame 2. Under the action of the reset spring, it is ensured that there is enough clearance between the trip arm 11 and the phase-controlled circuit breaker, so that the closing and opening actions of the circuit breaker are affected and meet the normal working requirements.

[0058] Secondly, when the emergency trip device 1 is in the non-activated state, the circuit breaker realizes the conversion between the test position and the working position under the action of the propulsion mechanism 5;

[0059] Then, when the emergency opening device 1 is in the non-activated state, under the action of the three-phase split body 4 of the permanent magnetic mechanism, the conductive circuit 6 of each phase can realize normal opening and closing actions, meeting the normal phase control switching;

[0060] Then, when emergency opening is required, the propulsion mechanism 5 is interlocked with the emergency opening device 1, and the propulsion mechanism 5 can drive the emergency opening device 1 through the interlocking crank arm 31 to realize the three-phase synchronous opening operation, so that when the trolley is pushed, the circuit breaker is in the three-phase opening position;

[0061] Then, the opening switch shaft 15 is subjected to the torque force of the external force, so that the opening switch shaft 15 rotates counterclockwise, and then drives the turning arm 16 to rotate counterclockwise, and the connecting rod 17 moves upward along the vertical direction, and at the same time, the tension spring 101 is deformed by the tension; the connecting rod 17 drives the linkage shaft 13 to rotate counterclockwise by driving the turning arm 14 and drives the opening switch turning arm 11 to rotate counterclockwise, and the opening switch turning arm 11 moves close to the opening switch stop pin 12, and drives the permanent magnet mechanism output shaft 41 to move linearly along the vertical direction toward the three-phase split 4 of the permanent magnet mechanism, so as to realize the opening of the three-phase permanent magnet mechanism, and ensure that the phase-controlled circuit breaker realizes the three-phase synchronous opening;

[0062] Finally, after the three-phase permanent magnet mechanism is opened, the torque force disappears, the tension spring 101 rebounds, and the tension spring 101 drives the rotating crank arm 16 to rotate clockwise around the opening shaft 15 while driving the connecting rod 17 to move downward in the up and down direction, so that the opening crank arm 11 moves away from the opening stop pin 12 to achieve reset, so that the phase-controlled circuit breaker can perform phase separation operation during normal operation.

[0063] Through the above description of the specific embodiment of the emergency tripping device 1 of the phase-controlled circuit breaker of the present invention, it can be seen that the emergency tripping device 1 of the phase-controlled circuit breaker of the present invention includes a mounting mechanism, a torque transmission mechanism and a tripping mechanism. The mounting mechanism is fixedly mounted on the frame 2 in the phase-controlled circuit breaker, and is used to mount the emergency tripping device on the frame; the torque transmission mechanism is arranged on the mounting mechanism, and is used to receive and transmit torque force; the tripping mechanism is transmission-connected with the torque transmission mechanism, and is used to receive torque force and realize tripping operation; the tripping mechanism includes a tripping portion corresponding to the output shaft 41 of the permanent magnet mechanism in the phase-controlled circuit breaker. The opening component, under the action of the torque transmission mechanism, drives the output shaft 41 of the permanent magnet mechanism to move linearly in the vertical direction toward the three-phase split 4 of the permanent magnet mechanism, so as to realize the three-phase synchronous opening of the phase-controlled circuit breaker; the torque transmission mechanism includes a reset component, which controls the position of the opening component before the phase-controlled circuit breaker performs the three-phase synchronous opening, so that the phase-controlled circuit breaker can perform the phase-splitting operation in normal operation; at the same time, after the three-phase synchronous opening, the reset component controls the opening component to achieve reset, so that the phase-controlled circuit breaker can also perform the phase-splitting operation in normal operation after the emergency opening. The emergency opening device 1 of the phase-controlled circuit breaker of the present invention realizes the phase-splitting action that meets the predetermined inter-pole operation requirements in different periods when the phase control is closed; in the case of emergency opening, a three-phase synchronous opening method is adopted, and the synchronization characteristics of the three-phase opening are guaranteed.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An emergency tripping device for a phase-controlled circuit breaker, characterized in that: include: A mounting mechanism, a torque transmission mechanism and a tripping mechanism, wherein the mounting mechanism is fixedly mounted on a frame (2) of a phase-controlled circuit breaker, the torque transmission mechanism being arranged on the mounting mechanism and being used to receive and transmit torque; the tripping mechanism is in transmission connection with the torque transmission mechanism, the tripping mechanism comprising a tripping component corresponding to an output shaft (41) of a permanent magnet mechanism in the phase-controlled circuit breaker, the tripping component simultaneously driving the output shaft (41) of the permanent magnet mechanism to move linearly in the up-down direction in the direction of the three-phase split body (4) of the permanent magnet mechanism under the action of the torque transmission mechanism, so as to realize three-phase synchronous tripping of the phase-controlled circuit breaker; the torque transmission mechanism comprising a reset component, so as to control the position of the tripping component before the phase-controlled circuit breaker performs three-phase synchronous tripping and to reset the component after the three-phase synchronous tripping, so that the phase-controlled circuit breaker can perform phase splitting operation during normal operation; The opening component comprises an opening crank arm (11) arranged on the opening mechanism and an opening stop pin (12) arranged on the output shaft (41) of the permanent magnet mechanism, the opening stop pin (12) being located between the opening crank arm (11) and the three-phase split body (4) of the permanent magnet mechanism, the opening crank arm (11) driving the output shaft (41) of the permanent magnet mechanism to move linearly in the vertical direction toward the three-phase split body (4) of the permanent magnet mechanism through the opening stop pin (12) to achieve three-phase synchronous opening of the phase-controlled circuit breaker; and a gap is provided between the opening crank arm (11) and the opening stop pin (12), the gap allowing the output shaft (41) of the permanent magnet mechanism to move linearly in the vertical direction away from the three-phase split body (4) of the permanent magnet mechanism to achieve phase separation operation when the phase-controlled circuit breaker is in normal operation; The opening mechanism further comprises a linkage shaft (13) and a driving crank arm (14); the opening crank arm (11) and the driving crank arm (14) are arranged on the linkage shaft (13) in opposite directions; the driving crank arm (14) is connected to the torque transmission mechanism and drives the linkage shaft (13) to rotate; the opening crank arm (11) rotates in the same direction and at the same angle under the action of the linkage shaft (13) to achieve three-phase synchronous opening of the phase-controlled circuit breaker and reset of the opening crank arm (11); The torque transmission mechanism further comprises a switch-off rotating shaft (15) and a switch-off transmission component connected thereto in transmission, the switch-off rotating shaft (15) being rotatably mounted on the mounting mechanism and used for receiving an external torque force and providing a torque force, the switch-off transmission component being connected in transmission to the driving crank arm (14); The switch-off transmission component comprises a rotating crank arm (16) and a connecting rod (17); the rotating crank arm (16) is fixedly connected to the switch-off rotating shaft (15); the connecting rod (17) is transmission-connected to the driving crank arm (14); the rotating crank arm (16) has arcuate surfaces arranged opposite to each other; the connecting rod (17) passes through the arcuate surfaces arranged opposite to each other in the up-down direction and forms an extrusion; the rotating crank arm (16) rotates around the switch-off rotating shaft (15) under the action of the switch-off rotating shaft (15) and drives the connecting rod (17) to move upward in the up-down direction, so as to achieve simultaneous three-phase switch-off.

2. The emergency tripping device of the phase-controlled circuit breaker according to claim 1, characterized in that: The mounting mechanism comprises a connecting mounting bent plate (18) and a fixed mounting bent plate (19), wherein the connecting mounting bent plate (18) and the fixed mounting bent plate (19) are provided with a first connecting hole, and the rotating crank arm (16) passes through the first connecting hole of the connecting mounting bent plate (18) and the fixed mounting bent plate (19) and rotates relative to the first connecting hole.

3. The emergency tripping device of the phase-controlled circuit breaker according to claim 2, characterized in that: The fixed mounting bent plate (19) comprises a first mounting plate arranged opposite to each other in a horizontal direction and a second mounting plate arranged opposite to each other in a vertical direction; the rotating crank arm (16) is arranged between the first mounting plate and the second mounting plate arranged opposite to each other; the first connecting hole is arranged on the first mounting plate and is used to penetrate the rotating crank arm (16); the second mounting plate is provided with a second connecting hole and is used to penetrate the connecting rod (17), so that the connecting rod (17) penetrates the second connecting hole and the rotating crank arm (16) simultaneously in the up-down direction.

4. The emergency tripping device of the phase-controlled circuit breaker according to claim 3, characterized in that: The reset component is a reset spring arranged between the rotating crank arm (16) and the second mounting plate. After the rotating crank arm (16) drives the connecting rod (17) to move upward in the vertical direction, the reset spring drives the rotating crank arm (16) to rotate around the opening switch rotating shaft (15) and drives the connecting rod (17) to move downward in the vertical direction, so that the opening switch crank arm (11) is reset.

5. The emergency tripping device of a phase-controlled circuit breaker according to any one of claims 1 to 4, characterized in that: The emergency opening device further comprises an interlocking mechanism (3), wherein the interlocking mechanism (3) comprises a connecting plate (32) and interlocking crank arms (31) hinged at both ends of the connecting plate (32), wherein one interlocking crank arm (31) is fixedly connected to the opening rotating shaft (15), and the other interlocking crank arm (31) is connected to a propulsion mechanism (5) in the phase-controlled circuit breaker.

6. A phase-controlled circuit breaker, characterized in that: It comprises the emergency opening device of the phase-controlled circuit breaker as claimed in any one of claims 1 to 5.

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