Split type three-phase dry-type on-load tap changer

Abstract

The application discloses a split type three-phase coherent vacuum on-load tap changer and relates to the technical field of on-load tap changers. The split type three-phase coherent vacuum on-load tap changer comprises a cabinet body, a plurality of fixed insulation plates are vertically arranged on the cabinet body, a selection switch is arranged on each fixed insulation plate, a selection shaft is arranged between two adjacent selection switches, and the two adjacent selection shafts are detachably connected. A switching switch is arranged on each fixed insulation plate, a switching shaft is arranged between two adjacent switching switches, and the two adjacent switching shafts are detachably connected. When the three-phase coherent vacuum on-load tap changer needs to be repaired or replaced, the selection shaft or the switching shaft can be first detached, and the damaged part structure can be repaired or replaced, so that the difficulty of processing and transportation is reduced, and the convenience of repairing or replacing the three-phase coherent vacuum on-load tap changer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of on-load tap changers, in particular to a split three-phase dry-type vacuum on-load tap changer. BACKGROUND

[0002] The three-phase dry-type vacuum on-load tap changer is one of the key devices for transformer on-load voltage regulation in power systems. It adjusts the transformer ratio by changing the tap position of the transformer without interrupting the load current, thereby achieving continuous adjustment of the output voltage.

[0003] Most existing three-phase dry-type vacuum on-load tap changers are cabinet type, with the three-phase switching switch and the three-phase selection switch as a whole. This design has the following advantages: 1. Designing the three-phase switching switch as a whole can ensure the synchronization of three-phase switching action, avoid voltage imbalance caused by three-phase switching time difference, and reduce potential damage to load equipment; 2. If the three-phase switches are independent, a fault in one phase may affect the normal operation of the other two phases, while the design of a whole assembly can better isolate faults and improve the overall reliability of the system; 3. In a limited space, the design of a whole assembly can make more efficient use of space and reduce the floor area occupied by the equipment.

[0004] However, if a fault occurs in one phase of the tap changer, the entire three-phase tap changer needs to be repaired or replaced, which is not convenient for processing and transportation due to the large overall size. In addition, the time and economic costs of replacing the entire unit are high, thereby reducing the convenience of repairing or replacing the three-phase dry-type vacuum on-load tap changer. SUMMARY

[0005] In view of the defects in the prior art, the technical problem to be solved by the present application is how to improve the convenience of repairing or replacing the three-phase dry-type vacuum on-load tap changer.

[0006] To achieve the above purpose, the split three-phase dry-type vacuum on-load tap changer provided by the present application comprises:

[0007] a cabinet body, a plurality of fixed insulation plates are vertically arranged on the cabinet body;

[0008] a selection switch, a switching switch is arranged on each fixed insulation plate, a selection shaft is arranged between two adjacent selection switches, and the two adjacent selection shafts are detachably connected, the selection shaft being used to adjust the pre-selection gear of the selection switch;

[0009] a switching switch, a switching switch is arranged on each fixed insulation plate, a switching shaft is arranged between two adjacent switching switches, and the two adjacent switching shafts are detachably connected, the switching shaft being used to adjust the switching gear of the switching switch;

[0010] The driving device is arranged on the cabinet body to realize rotation of the selection shaft and the switching shaft.

[0011] By adopting the above technical scheme, the overall selection switch and switching switch are divided into multiple phases, each phase is installed on a fixed insulating plate, when the three-phase dry-type vacuum on-load tap changer needs to be repaired or replaced, the selection shaft or the switching shaft can be disassembled first, and the damaged part structure can be repaired or replaced, thereby reducing the difficulty of processing and transportation, and improving the convenience of repairing or replacing the three-phase dry-type vacuum on-load tap changer.

[0012] In an embodiment, the selection switch comprises a gear set, a lead screw, a support, a movable contact set, a static contact set and a conductive rod, the lead screw is vertically installed on the fixed insulating plate through a first bearing seat, the lead screw is connected with the selection shaft through the gear set to realize self-rotation of the lead screw;

[0013] The support is arranged on the lead screw through a lead screw nut to realize movement of the support along the arrangement direction of the lead screw;

[0014] A top surface of the support is arranged with multiple movable contact sets, each movable contact set comprises two movable contacts, a spring and a pin shaft, the pin shaft is arranged through the two movable contacts, the spring is sleeved on the pin shaft, one end of the spring abuts against the top of the pin shaft, and the other end of the spring abuts against the movable contact;

[0015] The static contact set comprises multiple static contacts vertically arranged on the fixed insulating plate, the conductive rod is vertically arranged on the fixed insulating plate through a support rod, one end of the movable contact set is movably arranged on the conductive rod, and the other end of the movable contact set is movably arranged on the static contact set;

[0016] The number of the movable contact set, the static contact set and the conductive rod is the same.

[0017] By adopting the above technical scheme, rotation of the selection shaft can drive the lead screw to rotate, thereby driving the support to move upward or downward, the movable contact set is arranged on the support, thereby driving the movable contact set to move along the design direction of the conductive rod and the static contact set to realize pre-selection of the selection switch.

[0018] In an embodiment, the switching switch comprises a cam, a vacuum tube and a support, the support is arranged on the switching shaft through a second bearing seat, multiple vacuum tubes are arranged on the support, and the cam is fixedly arranged on the switching shaft to realize opening and closing of different vacuum tubes.

[0019] By adopting the above technical scheme, the cam drives the vacuum tube to open and close according to the program specified by the cam, and the opening and closing sequence of the vacuum tube can be changed by changing the cam, thereby improving the applicability of the switching switch.

[0020] In an embodiment, the support comprises a first insulating support, a second insulating support and a connecting support, the first insulating support is arranged on the switching shaft through the second bearing seat, the second insulating support is provided with a plurality of vacuum tubes, the first insulating support and the second insulating support are fixedly connected through the connecting support, and the connecting support is fixedly arranged on the fixed insulating plate, and the driving lever of the cam is arranged through the first insulating support.

[0021] By adopting the above technical scheme, the plurality of vacuum tubes are arranged on the second insulating support, and the first insulating support and the second insulating support are fixedly connected through the connecting support, so that the stability of the switching switch arranged on the fixed insulating plate is improved, and the overall support is divided into the first insulating support, the second insulating support and the connecting support, so that when the support needs to be repaired, the damaged part can be disassembled and repaired or replaced, thereby reducing the difficulty of processing and transportation of the parts, and further improving the convenience of repairing or replacing the three-phase dry-type vacuum on-load tap-changer.

[0022] In an embodiment, the driving device comprises a motor, a selection shaft transmission assembly and a switching shaft transmission assembly, a first transmission shaft is arranged between the selection shaft transmission assembly and the nearest selection shaft to drive the rotation of the selection shaft, and a second transmission shaft is arranged between the switching shaft transmission assembly and the nearest switching shaft to drive the rotation of the switching shaft.

[0023] By adopting the above technical scheme, the rotation of the selection shaft is driven by the motor, the selection shaft transmission assembly and the first transmission shaft, and the rotation of the switching shaft is driven by the motor, the switching shaft transmission assembly and the second transmission shaft.

[0024] In an embodiment, the selection shaft transmission assembly comprises a first fixed base, a first bevel gear, a second bevel gear, a first gear and a second gear, the motor is fixedly arranged on the first fixed base, and the first fixed base is fixedly arranged on the cabinet, the first bevel gear is fixedly connected with the driving shaft of the motor, the second bevel gear is meshingly connected with the first bevel gear, the first gear is fixedly connected with the second bevel gear through a first shaft to drive the rotation of the first gear, and the second gear is meshingly connected with the first gear, and the second gear is fixedly connected with the first transmission shaft through a second shaft to drive the rotation of the first transmission shaft.

[0025] By adopting the above technical scheme, the rotation of the first transmission shaft can be realized, so as to drive the rotation of the selection shaft, and the driving device can be fixed on the cabinet through the first fixed base, so as to avoid the falling of the driving device during work.

[0026] In an embodiment, the switching shaft transmission assembly comprises a third gear, a fourth gear and an energy storage assembly, the third gear is fixedly connected with the second bevel gear through a first shaft, the fourth gear is meshingly connected with the third gear, the fourth gear is connected with the energy storage assembly to store energy, the energy storage assembly is connected with the second transmission shaft to release energy and drive the rotation of the second transmission shaft.

[0027] By adopting the above technical solution, on the basis of realizing the rotation of the first drive shaft, an additional structure can be added to realize the rotation of the second drive shaft, thereby driving the rotation of the switching shaft. Therefore, the number of parts used in the drive structure is reduced, which not only saves costs, but also reduces the size of the overall drive device.

[0028] In one embodiment, the energy storage component includes a first rocker arm, a connecting rod, a rocker arm, a spring assembly, and a second rocker arm. The first rocker arm is fixedly connected to a fourth gear via a third shaft. The connecting rod is rotatably mounted on the first rocker arm via a fourth shaft. The rocker arm is rotatably mounted on the connecting rod via a fifth shaft. The spring assembly is connected to the rocker arm via a sixth shaft to achieve energy storage. One side of the second rocker arm is connected to the spring assembly to achieve energy release from the spring assembly and rotation of the second rocker arm. The other side of the second rocker arm is fixedly connected to a second transmission shaft to achieve rotation of the second transmission shaft.

[0029] By adopting the above technical solution, the energy storage component can achieve energy storage and release with just some arms, rods and springs. It is not only low in cost, but also fast in response, thereby driving the switching shaft to move quickly within a certain angle.

[0030] In one embodiment, a shock-absorbing assembly is provided on the second rocker arm. The shock-absorbing assembly includes a shock-absorbing block, a shock absorber, and a second fixed base. The shock-absorbing block is fixedly disposed on the second rocker arm. The second rocker arm and the second drive shaft are fixedly connected by a seventh shaft, which passes through the second fixed base. The shock absorber is disposed on the second fixed base to absorb excess energy.

[0031] By adopting the above technical solution, excessive energy released by the spring assembly is avoided, which could cause the second rocker arm to rotate excessively, thereby preventing the switch from working properly or even damaging the switch. Therefore, a shock-absorbing component is set up to absorb excess energy.

[0032] In one embodiment, a third bevel gear is fixedly mounted on the third shaft, and a fourth bevel gear is meshed with the third bevel gear. The fourth bevel gear is connected to the gear position indicator component via the eighth shaft, so that the gear position indicator component can display the pre-selected gear of the selection switch.

[0033] By adopting the above technical solution, after the selector switch is pre-selected, the selected gear can be intuitively observed through the gear indicator component.

[0034] In summary, the present invention has at least one of the following beneficial technical effects:

[0035] 1. By dividing the overall selector switch and changeover switch into multiple phases, each phase is mounted on a fixed insulating plate, and a selector shaft is provided between two adjacent selector switches, with a detachable connection between the selector shafts. Similarly, a changeover shaft is provided between two adjacent changeover switches, with a detachable connection between the changeover shafts. Therefore, when the three-phase dry-type vacuum on-load tap changer needs to be repaired or replaced, the selector shaft or changeover shaft can be disassembled first, and the damaged parts of the structure can be repaired or replaced. This reduces the difficulty of processing and transportation, thereby improving the convenience of repairing or replacing the three-phase dry-type vacuum on-load tap changer.

[0036] 2. Multiple vacuum tubes are mounted using a second insulating frame, and the first and second insulating frames are fixed together using a connecting frame. This not only enhances the stability of the switching switch mounted on the fixed insulating plate, but also breaks down the entire support into the first insulating frame, the second insulating frame, and the connecting frame. Therefore, when the support needs maintenance, it can be disassembled and the damaged parts can be repaired or replaced, thereby reducing the difficulty of processing and transporting parts and further improving the convenience of maintenance or replacement of the three-phase dry-type vacuum on-load tap changer.

[0037] 3. By adding a structure to achieve the rotation of the first drive shaft, the rotation of the second drive shaft can be achieved, thereby driving the rotation of the switching shaft. This reduces the number of parts used in the drive structure, saving costs and reducing the overall size of the drive device. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a split-type three-phase dry-type vacuum on-load tap changer according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the selector switch according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the switching switch according to an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the driving device according to an embodiment of the present invention;

[0042] Figure 5 for Figure 4 Side view.

[0043] In the diagram: 1-Cabinet, 11-Fixed insulating plate, 2-Selector switch, 201-Lead screw, 202-Gear set, 203-Lead nut, 204-Support component, 205-First bearing seat, 206-Moving contact, 207-Pin, 208-Spring, 209-Stationary contact, 2010-Conductive rod, 2011-Support rod, 3-Changeover switch, 301-Second bearing seat, 302-Cam, 303-First insulating frame, 304-Connecting frame, 305-Second insulating frame, 306-Vacuum tube, 307-Drive lever, 4-Selector shaft, 5-Changeover shaft, 6-Drive device, 601-Motor, 602-Rotary shaft transmission assembly, 6021-First bevel gear, 6022-Second bevel gear, 6023-First fixed... Fixed base, 6024-first shaft, 6025-first gear, 6026-second gear, 6027-second shaft, 603-switching shaft transmission assembly, 6031-third gear, 6032-fourth gear, 6033-third shaft, 6034-first rocker arm, 6035-fourth shaft, 6036-connecting rod, 6037-fifth shaft, 6038-rocker arm, 6039-sixth shaft, 60310-spring assembly, 60311-second rocker arm, 60312-shock absorber, 60313-second fixed base, 60314-shock absorber, 604-first drive shaft, 605-second drive shaft, 606-third bevel gear, 607-fourth bevel gear, 608-eighth shaft, 609-gear position indicator assembly. Detailed Implementation

[0044] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] The split-type three-phase dry-type vacuum on-load tap changer in this embodiment of the invention is shown below. Figure 1 As shown, the split-type three-phase dry-type vacuum on-load tap changer includes a cabinet 1 with three vertically mounted fixed insulating plates 11; selector switches 2, each fixed insulating plate 11 has a switching switch 3, and a selection shaft 4 is arranged between two adjacent selector switches 2 along the distribution direction of the selector switches 2, and the two adjacent selection shafts 4 are detachably connected. The selection shaft 4 is used to adjust the pre-selection position of the selector switch 2; switching switches 3, each fixed insulating plate 11 has a switching switch 3, and a switching shaft 5 is arranged between two adjacent switching switches 3 along the distribution direction of the switching switches 3, and the two adjacent switching shafts 5 are detachably connected. The switching shaft 5 is used to adjust the switching position of the switching switch 3; and a drive device 6 is mounted on the cabinet 1 to realize the rotation of the selection shaft 4 and the switching shaft 5. The length of the selection shaft 4 and the switching shaft 5 can be designed according to requirements to change the distance between two adjacent selector switches 2 and switching switches 3, thereby changing the insulation strength; the selection shaft 4 and the switching shaft 5 can be threaded to increase the creepage distance.

[0046] Therefore, this invention divides the overall selector switch 2 and switching switch 3 into multiple phases, with each phase mounted on a fixed insulating plate 11. A selector shaft 4 is provided between two adjacent selector switches 2, and the selector shaft 4 is detachably connected to each other. A switching shaft 5 is provided between two adjacent switching switches 3, and the switching shaft 5 is also detachably connected to each other. Therefore, when the three-phase dry-type vacuum on-load tap changer needs to be repaired or replaced, the selector shaft 4 or switching shaft 5 can be disassembled first, and the damaged parts of the structure can be repaired or replaced. This reduces the difficulty of processing and transportation, thereby improving the convenience of repairing or replacing the three-phase dry-type vacuum on-load tap changer.

[0047] Preferred, see Figure 2 As shown, a specific structure for a selection switch 2 is provided:

[0048] The selector switch 2 includes a gear set 202, a lead screw 201, a support member 204, a set of moving contacts 206, a set of stationary contacts 209, and a conductive rod 2010. The lead screw 201 is vertically mounted on the fixed insulating plate 11 via a first bearing seat 205. The lead screw 201 is connected to the selector shaft 4 via the gear set 202 to enable the lead screw 201 to rotate. The support member 204 is mounted on the lead screw 201 via a nut 203 to enable the support member 204 to move along the direction of the lead screw 201. The top surface of the support member 204 is provided with multiple sets of moving contacts 206, each set of moving contacts 206 including two moving contacts 206, a spring 208, and a pin. A shaft 207 is provided, and two movable contact pieces 206 are provided with a pin 207. A spring 208 is sleeved on the pin 207. One end of the spring 208 abuts against the top of the pin 207, and the other end abuts against the movable contact piece 206. The set of stationary contacts 209 includes a plurality of stationary contacts 209 vertically arranged on the fixed insulating plate 11. The conductive rod 2010 is vertically arranged on the fixed insulating plate 11 through the support rod 2011. One end of the set of movable contact pieces 206 is movably arranged on the conductive rod 2010, and the other end is movably arranged on the set of stationary contacts 209. The number of the set of movable contact pieces 206, the set of stationary contacts 209, and the conductive rod 2010 are the same.

[0049] Specifically, the lead screw 201 is fixedly mounted on the fixed insulating plate 11 via several first bearing seats 205. A bevel gear is provided on the top of the lead screw 201, and a bevel gear is also fixed on the selection shaft 4. The two bevel gears mesh to achieve the rotation of the lead screw 201. The rotation of the lead screw 201 drives the support member 204 to move up and down, thereby driving the moving contact piece 206 group to move up and down. Since the moving contact piece 206 group consists of two moving contact pieces 206 with a pin 207 passing through them and a spring 208 sleeved on the pin 207, one end of the moving contact piece 206 group can be clamped on the conductive rod 2010, and the other end can be clamped on the stationary contact 209 of the stationary contact 209 group. The support member 204 drives the moving contact piece 206 group to move along the design direction of the conductive rod 2010 and the stationary contact 209 group, causing the moving contact piece 206 to connect with different stationary contacts 209 to achieve the pre-selection of the selection switch 2.

[0050] Preferred, see Figure 3 As shown, a specific structure of a switching switch 3 is provided:

[0051] The switching switch 3 includes a cam 302, a vacuum tube 306 and a bracket. The bracket is mounted on the switching shaft 5 via a second bearing seat 301. Three vacuum tubes 306 are mounted on the bracket. The cam 302 is fixedly mounted on the switching shaft 5 to enable the switching of different vacuum tubes 306.

[0052] Specifically, the selection is first pre-selected by the selector switch 2, and then the cam 302 fixed on it is rotated by the switching shaft 5. Therefore, the cam 302 drives the vacuum tube 306 to open and close according to the program specified by the cam 302. The opening and closing sequence of the vacuum tube 306 can be changed by changing the cam 302 to improve the applicability of the switching switch 3. In this embodiment, the opening and closing sequence of the three vacuum tubes 306 is as follows: V1 is opened first, then V2 is opened after a period of time, then V1 is closed after a period of time, then V3 is opened after a period of time, and then V2 is closed after a period of time. The above is the process of the switching switch 3 completing one gear change. Among them, the vacuum tube 306 is electrically connected to the conductive rod 2010 of the selector switch 2.

[0053] Furthermore, the support includes a first insulating frame 303, a second insulating frame 305, and a connecting frame 304. The first insulating frame 303 is mounted on the switching shaft 5 via a second bearing seat 301. The second insulating frame 305 is provided with multiple vacuum tubes 306. The first insulating frame 303 and the second insulating frame 305 are fixedly connected via the connecting frame 304, and the connecting frame 304 is fixedly mounted on the fixed insulating plate 11. The drive lever 307 of the cam 302 passes through the first insulating frame 303.

[0054] Specifically, three vacuum tubes 306 are mounted using the second insulating frame 305, and the first insulating frame 303 and the second insulating frame 305 are fixed using the connecting frame 304. This not only enhances the stability of the switch 3 mounted on the fixed insulating plate 11, but also divides the overall support into the first insulating frame 303, the second insulating frame 305, and the connecting frame 304. Therefore, when the support needs maintenance, it can be disassembled and the damaged parts can be repaired or replaced, thereby reducing the difficulty of processing and transporting parts and further improving the convenience of maintenance or replacement of the three-phase dry-type vacuum on-load tap changer.

[0055] Preferred, see Figure 4 , 5 The following describes the specific structure of a driving device 6:

[0056] The drive device 6 includes a motor 601, a selection shaft 4 transmission assembly and a switching shaft transmission assembly 603. A first transmission shaft 604 is provided between the selection shaft 4 transmission assembly and the nearest selection shaft 4 to realize the rotation of the selection shaft 4. A second transmission shaft 605 is provided between the switching shaft transmission assembly 603 and the nearest switching shaft 5 to realize the rotation of the switching shaft 5.

[0057] Specifically, motor 601 drives the first drive shaft 604 to rotate via the selection shaft 4 transmission assembly, and the first drive shaft 604 drives the selection shaft 4 to rotate. Therefore, the selection shaft 4 can be driven to rotate via motor 601, the selection shaft 4 transmission assembly, and the first drive shaft 604. Motor 601 drives the second drive shaft 605 to rotate via the switching shaft transmission assembly 603, and the second drive shaft 605 drives the switching shaft 5 to rotate. Therefore, the switching shaft 5 can be driven to rotate via motor 601, the switching shaft transmission assembly 603, and the second drive shaft 605. The first drive shaft 604 can also be the selection shaft 4, which is detachably connected to the selection shaft 4 between two adjacent selection switches 2. The second drive shaft 605 can also be the switching shaft 5, which is detachably connected to the switching shaft 5 between two adjacent switching switches 3. This eliminates the need to make a mold for the drive shaft, thereby reducing manufacturing costs and process difficulty. If the drive shaft is damaged, it can be replaced simply by replacing it with a new selection shaft 4 / switching shaft 5, further improving the convenience of maintenance or replacement of the three-phase dry vacuum on-load tap changer.

[0058] Furthermore, a specific structure for the selector shaft 4 transmission assembly is provided:

[0059] The transmission assembly of shaft 4 includes a first fixed base 6023, a first bevel gear 6021, a second bevel gear 6022, a first gear 6025, and a second gear 6026. A motor 601 is fixedly mounted on the first fixed base 6023, which is also fixedly mounted on the cabinet 1. The first bevel gear 6021 is fixedly connected to the drive shaft of the motor 601. The second bevel gear 6022 meshes with the first bevel gear 6021. The first gear 6025 is fixedly connected to the second bevel gear 6022 via a first shaft 6024 to achieve rotation of the first gear 6025. The second gear 6026 meshes with the first gear 6025. The second gear 6026 is fixedly connected to the first transmission shaft 604 via a second shaft 6027 to achieve rotation of the first transmission shaft 604.

[0060] Specifically, the motor 601 is fixed to the bottom of the first fixed base 6023, and its drive shaft extends to the top of the first fixed base 6023. The drive shaft drives the first bevel gear 6021 to rotate, and the first bevel gear 6021 drives the second bevel gear 6022 to rotate. Since the second bevel gear 6022 is fixedly connected to the first gear 6025 through the first shaft 6024, the second bevel gear 6022 drives the first gear 6025 to rotate, and the first gear 6025 drives the second gear 6026 to rotate. Since the second gear 6026 is fixedly connected to the first transmission shaft 604 through the second shaft 6027, the second gear 6026 drives the first transmission shaft 604 to rotate, thereby driving the rotating shaft to rotate. At the same time, the drive device 6 can be fixed to the cabinet 1 through the first fixed base 6023 to prevent the drive device 6 from falling off during operation.

[0061] Furthermore, a specific structure of the switching shaft drive assembly 603 is provided:

[0062] The switching shaft drive assembly 603 includes a third gear 6031, a fourth gear 6032, and an energy storage assembly. The third gear 6031 is fixedly connected to the second bevel gear 6022 via a first shaft 6024. The fourth gear 6032 is meshed with the third gear 6031 and connected to the energy storage assembly to store energy. The energy storage assembly is connected to the second drive shaft 605 to release energy and cause the second drive shaft 605 to rotate.

[0063] Specifically, the third gear 6031 is fixed between the second bevel gear 6022 and the first gear 6025, that is, fixedly mounted on the first shaft 6024, so that the second bevel gear 6022 drives the third gear 6031 to rotate, and the third gear 6031 drives the fourth gear 6032 to rotate. The kinetic energy of the rotation of the fourth gear 6032 can be stored in the energy storage component, and then the stored energy is released to drive the second transmission shaft 605 to rotate, thereby driving the switching shaft 5 to rotate. Based on the rotation of the first transmission shaft 604, an additional structure can be added to realize the rotation of the second transmission shaft 605, thereby driving the switching shaft 5 to rotate. Therefore, the number of parts used in the drive structure is reduced, which not only saves costs, but also reduces the overall size of the drive device 6.

[0064] Furthermore, the energy storage component includes a first rocker arm 6034, a connecting rod 6036, a rocker arm 6038, a spring assembly 60310, and a second rocker arm 60311. The first rocker arm 6034 is fixedly connected to a fourth gear 6032 via a third shaft 6033. The connecting rod 6036 is rotatably mounted on the first rocker arm 6034 via a fourth shaft 6035. The rocker arm 6038 is rotatably mounted on the connecting rod 6036 via a fifth shaft 6037. The spring assembly 60310 is connected to the rocker arm 6038 via a sixth shaft 6039 to achieve energy storage in the spring assembly 60310. One side of the second rocker arm 60311 is connected to the spring assembly 60310 to achieve energy release from the spring assembly 60310 and rotation of the second rocker arm 60311. The other side of the second rocker arm 60311 is fixedly connected to a second transmission shaft 605 to achieve rotation of the second transmission shaft 605.

[0065] Specifically, the fourth gear 6032 drives the first rocker arm 6034 to swing via the third shaft 6033. The first rocker arm 6034 drives the connecting rod 6036 to swing via the fourth shaft 6035. The connecting rod 6036 drives the rocker arm 6038 to swing via the fifth shaft 6037. The rocker arm 6038 compresses or stretches the spring assembly 60310 via the sixth shaft 6039, thereby converting kinetic energy into elastic potential energy. The release of elastic potential energy drives the second rocker arm 60311 to rotate. The second rocker arm 60311 drives the second transmission shaft 605 to rotate, thereby driving the switching shaft 5 to rotate. This energy storage component only needs some arms, rods and springs 208 to achieve energy storage and release. It is not only low in cost, but also has a fast response speed, thereby driving the switching shaft 5 to move rapidly within a certain angle.

[0066] Furthermore, a shock-absorbing assembly is provided on the second rocker arm 60311. The shock-absorbing assembly includes a shock-absorbing block 60312, a shock absorber 60314, and a second fixed base 60313. The shock-absorbing block 60312 is fixedly installed on the second rocker arm 60311. The second rocker arm 60311 is fixedly connected to the second transmission shaft 605 through a seventh shaft, and the seventh shaft passes through the second fixed base 60313. The shock absorber 60314 is installed on the second fixed base 60313 to absorb excess energy.

[0067] Specifically, during the rotation of the second rocker arm 60311, the shock absorber 60312 on the second rocker arm 60311 will collide with the shock absorber 60314 on the second fixed base 60313 to absorb excess energy and prevent the spring assembly 60310 from releasing too much energy, which would cause the second rocker arm 60311 to rotate excessively, thereby causing the switch 3 to malfunction or even be damaged. Therefore, a shock absorber assembly is set to absorb excess energy.

[0068] Preferably, a third bevel gear 606 is fixedly mounted on the third shaft 6033, and a fourth bevel gear 607 is meshed on the third bevel gear 606. The fourth bevel gear 607 is connected to the gear position indicator component 609 through the eighth shaft 608, so that the gear position indicator component 609 can display the pre-selected gear of the selection switch 2.

[0069] Specifically, during the pre-selection process of the selector switch 2, the third bevel gear 606 drives the fourth bevel gear 607 to rotate, and the fourth bevel gear 607 drives the gear position indicator component 609 to be adjusted through the eighth shaft 608. The gear position pre-selected by the selector switch 2 can be observed intuitively through the gear position indicator component 609.

[0070] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A split-type three-phase dry-type vacuum on-load tap changer, characterized in that, It includes: The cabinet (1) has multiple fixed insulating plates (11) vertically installed on it. Select switch (2), each fixed insulating plate (11) is equipped with a switching switch (3), a selection shaft (4) is provided between two adjacent select switches (2), and the two adjacent selection shafts (4) are detachably connected. The selection shaft (4) is used to adjust the pre-selection position of the select switch (2); A switching switch (3) is provided on each fixed insulating plate (11). A switching shaft (5) is provided between two adjacent switching switches (3), and the two adjacent switching shafts (5) are detachably connected. The switching shaft (5) is used to adjust the switching position of the switching switch (3). A drive unit (6) is mounted on the cabinet (1) to enable the rotation of the selection shaft (4) and the switching shaft (5); The selector switch (2) includes a gear set (202), a lead screw (201), a support (204), a moving contact (206) group, a stationary contact (209) group, and a conductive rod (2010). The lead screw (201) is vertically mounted on the fixed insulating plate (11) through the first bearing seat (205). The lead screw (201) is connected to the selector shaft (4) through the gear set (202) to realize the rotation of the lead screw (201). The support member (204) is mounted on the lead screw (201) via a nut (203) to enable the support member (204) to move along the direction of the lead screw (201); The top surface of the support member (204) is provided with multiple sets of movable contact pieces (206). Each set of movable contact pieces (206) includes two movable contact pieces (206), a spring (208), and a pin (207). The pin (207) is inserted through the two movable contact pieces (206), and the spring (208) is sleeved on the pin (207). One end of the spring (208) abuts against the top of the pin (207), and the other end abuts against the movable contact piece (206). The stationary contact (209) group includes multiple stationary contacts (209) vertically arranged on the fixed insulating plate (11), the conductive rod (2010) is vertically arranged on the fixed insulating plate (11) through the support rod (2011), one end of the moving contact (206) group is movably arranged on the conductive rod (2010), and the other end is movably arranged on the stationary contact (209) group; The number of moving contact (206) group, stationary contact (209) group and conductive rod (2010) is the same; The switching switch (3) includes a cam (302), a vacuum tube (306) and a bracket. The bracket is mounted on the switching shaft (5) via a second bearing seat (301). Multiple vacuum tubes (306) are mounted on the bracket. The cam (302) is fixedly mounted on the switching shaft (5) to enable the switching of different vacuum tubes (306). The support includes a first insulating frame (303), a second insulating frame (305), and a connecting frame (304). The first insulating frame (303) is mounted on the switching shaft (5) via a second bearing seat (301). The second insulating frame (305) is provided with multiple vacuum tubes (306). The first insulating frame (303) and the second insulating frame (305) are fixedly connected via the connecting frame (304), and the connecting frame (304) is fixedly mounted on the fixed insulating plate (11). The driving lever (307) of the cam (302) passes through the first insulating frame (303).

2. The split-type three-phase dry-type vacuum on-load tap changer as described in claim 1, characterized in that: The drive device (6) includes a motor (601), a selection shaft (4) transmission assembly and a switching shaft transmission assembly (603). A first transmission shaft (604) is provided between the selection shaft (4) transmission assembly and the nearest selection shaft (4) to realize the rotation of the selection shaft (4). A second transmission shaft (605) is provided between the switching shaft transmission assembly (603) and the nearest switching shaft (5) to realize the rotation of the switching shaft (5).

3. The split-type three-phase dry-type vacuum on-load tap changer as described in claim 2, characterized in that: The selection shaft (4) transmission assembly includes a first fixed base (6023), a first bevel gear (6021), a second bevel gear (6022), a first gear (6025), and a second gear (6026). The motor (601) is fixedly mounted on the first fixed base (6023), and the first fixed base (6023) is fixedly mounted on the cabinet (1). The first bevel gear (6021) is fixedly connected to the drive shaft of the motor (601). The second bevel gear (6022) is meshed with the first bevel gear (6021). The first gear (6025) is fixedly connected to the second bevel gear (6022) through the first shaft (6024) to realize the rotation of the first gear (6025). The second gear (6026) is meshed with the first gear (6025). The second gear (6026) is fixedly connected to the first transmission shaft (604) through the second shaft (6027) to realize the rotation of the first transmission shaft (604).

4. The split-type three-phase dry-type vacuum on-load tap changer as described in claim 3, characterized in that: The switching shaft transmission assembly (603) includes a third gear (6031), a fourth gear (6032), and an energy storage assembly. The third gear (6031) is fixedly connected to the second bevel gear (6022) via a first shaft (6024). The fourth gear (6032) meshes with the third gear (6031) and is connected to the energy storage assembly to enable the energy storage assembly to store energy. The energy storage assembly is connected to the second transmission shaft (605) to enable the energy storage assembly to release energy and cause the second transmission shaft (605) to rotate.

5. The split-type three-phase dry-type vacuum on-load tap changer as described in claim 4, characterized in that: The energy storage component includes a first rocker arm (6034), a connecting rod (6036), a rocker arm (6038), a spring assembly (60310), and a second rocker arm (60311). The first rocker arm (6034) is fixedly connected to a fourth gear (6032) via a third shaft (6033). The connecting rod (6036) is rotatably mounted on the first rocker arm (6034) via a fourth shaft (6035). The rocker arm (6038) is rotatably mounted on the connecting rod (60311) via a fifth shaft (6037). 6) The spring assembly (60310) is connected to the rocker arm (6038) via the sixth shaft (6039) to store energy. One side of the second rocker arm (60311) is connected to the spring assembly (60310) to release energy and rotate the second rocker arm (60311). The other side of the second rocker arm (60311) is fixedly connected to the second drive shaft (605) to rotate the second drive shaft (605).

6. The split-type three-phase dry-type vacuum on-load tap changer as described in claim 5, characterized in that: The second rocker arm (60311) is provided with a shock-absorbing component, which includes a shock-absorbing block (60312), a shock absorber (60314), and a second fixed base (60313). The shock-absorbing block (60312) is fixedly installed on the second rocker arm (60311). The second rocker arm (60311) is fixedly connected to the second transmission shaft (605) through a seventh shaft, and the seventh shaft passes through the second fixed base (60313). The shock absorber (60314) is installed on the second fixed base (60313) to absorb excess energy.

7. The split-type three-phase dry-type vacuum on-load tap changer as described in claim 5, characterized in that: A third bevel gear (606) is fixedly installed on the third shaft (6033), and a fourth bevel gear (607) is meshed on the third bevel gear (606). The fourth bevel gear (607) is connected to the gear position indicator component (609) through the eighth shaft (608) so that the gear position indicator component (609) can display the pre-selected gear of the selection switch (2).

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