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

Abstract

The invention discloses a split type three-phase dry type vacuum on-load tap-changer, and relates to the technical field of on-load tap-changers. The split-type three-phase dry-type vacuum on-load tap-changer comprises a cabinet body, wherein a plurality of fixed insulating plates are vertically arranged on the cabinet body; a selector switch is arranged on each fixed insulating plate, a selection shaft is arranged between every two adjacent selection switches, and every two adjacent selection shafts are detachably connected; each fixed insulating plate is provided with one change-over switch, a change-over shaft is arranged between every two adjacent change-over switches, and every two adjacent change-over shafts are detachably connected. When the three-phase dry-type vacuum on-load tap-changer needs to be maintained or replaced, the selection shaft or the switching shaft can be disassembled firstly, and the damaged part structure is maintained or replaced, so that the processing and transportation difficulty is reduced, and the maintenance or replacement convenience of the three-phase dry-type vacuum on-load tap-changer is improved.

Description

Technical Field

[0001] The invention relates to the technical field of on-load tap changers, and in particular to a split three-phase dry vacuum on-load tap changer. Background Art

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

[0003] Most of the existing three-phase dry vacuum on-load tap changers are cabinet-type, and the three phases of the switch are an integral component. The advantages of selecting the switch as an integral component are: 1. Designing the three-phase switch as an integral component can ensure the synchronization of the three-phase switching action and avoid voltage imbalance caused by the three-phase switching time difference, thereby reducing potential damage to the load equipment; 2. If the three-phase switch is independent, when a phase fails, it may affect the normal operation of the other two phases, and the design of the overall component can better isolate the fault and improve the overall reliability of the system; 3. In a limited space, the design of the overall component can make more effective use of space and reduce the footprint of the equipment.

[0004] However, once a phase of the tap changer fails and is damaged, if it needs to be repaired, the three-phase tap changer needs to be repaired or replaced as a whole. The overall size is large, which is not convenient for processing and transportation. At the same time, the time cost and economic cost of overall replacement are high, thereby reducing the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer. Summary of the invention

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

[0006] In order to achieve the above objectives, the present invention provides a split three-phase dry vacuum on-load tap changer, comprising: A cabinet body, on which a plurality of fixed insulating plates are vertically arranged; A selection switch, each fixed insulating plate is provided with a switching switch, a selection shaft is provided between two adjacent selection switches, and the two adjacent selection shafts are detachably connected, and the selection shaft is used to adjust the pre-selected gear position of the selection switch; A switching switch is provided on each fixed insulating plate, a switching shaft is provided between two adjacent switching switches, and the two adjacent switching shafts are detachably connected, and the switching shaft is used to adjust the switching gear of the switching switch; The driving device is arranged on the cabinet to realize the rotation of the selection shaft and the switching shaft.

[0007] By adopting the above technical solution, the overall selection switch and switching switch are divided into multiple phases, and each phase is installed on a fixed insulating plate. When the three-phase dry 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 of the structure can be repaired or replaced, thereby reducing the difficulty of processing and transportation, thereby improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer.

[0008] In one embodiment, the selection switch includes a gear set, a screw rod, a support, a movable contact piece set, a stationary contact head set and a conductive rod, the screw rod is vertically mounted on a fixed insulating plate through a first bearing seat, and the screw rod is connected to the selection shaft through a gear set to realize the self-rotation of the screw rod; The support member is arranged on the screw rod through a screw nut to realize the movement of the support member along the setting direction of the screw rod; A plurality of moving contact pieces are mounted on the top surface of the support member, and the moving contact piece groups include two moving contact pieces, a spring and a pin shaft. The two moving contact pieces are provided with a pin shaft, and the pin shaft is sleeved with a spring. One end of the spring abuts against the top of the pin shaft, and the other end of the spring abuts against the moving contact piece. The static contact group includes a plurality of static contacts vertically arranged on the fixed insulating plate, the conductive rod is vertically arranged on the fixed insulating plate through the support rod, one end of the movable contact piece group is movably arranged on the conductive rod, and the other end thereof is movably arranged on the static contact group; The numbers of the moving contact piece groups, the stationary contact head groups and the conductive rods are the same.

[0009] By adopting the above technical solution, the rotation of the selection shaft can drive the screw to rotate, thereby driving the support member to move upward or downward. Since the moving contact piece group is mounted on the support member, the moving contact piece group is driven to move along the designed direction of the conductive rod and the static contact group, so as to realize the pre-selection of the selection switch.

[0010] In one embodiment, the switching switch includes a cam, a vacuum tube and a bracket. The bracket is arranged on the switching shaft through a second bearing seat. A plurality of vacuum tubes are arranged on the bracket. The cam is fixedly arranged on the switching shaft to realize the opening and closing of different vacuum tubes.

[0011] By adopting the above technical solution, the cam drives the vacuum tube to be opened and closed 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, so as to improve the applicability of the switching switch.

[0012] In one embodiment, the bracket includes a first insulating frame, a second insulating frame and a connecting frame, the first insulating frame is arranged on the switching shaft through a second bearing seat, a plurality of vacuum tubes are arranged on the second insulating frame, the first insulating frame and the second insulating frame are fixedly connected through the connecting frame, and the connecting frame is fixedly arranged on a fixed insulating plate, and the driving lever of the cam is arranged on the first insulating frame.

[0013] By adopting the above technical solution, multiple vacuum tubes are set up through the second insulating frame, and the first insulating frame and the second insulating frame are fixed through the connecting frame, which not only strengthens the stability of the switching switch set on the fixed insulating plate, but also splits the overall bracket into the first insulating frame, the second insulating frame and the connecting frame. Therefore, when the bracket part needs to be repaired, it can be disassembled and the damaged part can be repaired or replaced, thereby reducing the difficulty of processing and transportation of accessories, thereby further improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer.

[0014] In one embodiment, the driving device includes 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 realize 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 realize the rotation of the switching shaft.

[0015] By adopting the above technical solution, the selection shaft is driven to rotate by the motor, the selection shaft transmission assembly and the first transmission shaft, and the switching shaft is driven to rotate by the motor, the switching shaft transmission assembly and the second transmission shaft.

[0016] In one embodiment, the selection shaft transmission assembly includes a first fixed base, a first bevel gear, a second bevel gear, a first gear and a second gear. The motor is fixedly set on the first fixed base, and the first fixed base is fixedly set on the cabinet. The first bevel gear is fixedly connected to the driving shaft of the motor, the second bevel gear is meshingly connected to the first bevel gear, the first gear is fixedly connected to the second bevel gear through the first shaft to realize the rotation of the first gear, the second gear is meshingly connected to the first gear, and the second gear is fixedly connected to the first transmission shaft through the second shaft to realize the rotation of the first transmission shaft.

[0017] By adopting the above technical solution, the first transmission shaft can be rotated, thereby driving the selection shaft to rotate, and the driving device can be fixed to the cabinet through the first fixed base to prevent the driving device from falling during operation.

[0018] In one embodiment, the switching shaft transmission assembly includes a third gear, a fourth gear, and an energy storage assembly. The third gear is fixedly connected to the second bevel gear through the first shaft, the fourth gear is meshingly connected to the third gear, and the fourth gear 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 to enable the energy storage assembly to release energy and cause the second transmission shaft to rotate.

[0019] By adopting the above technical solution, a part of the structure is added on the basis of realizing the rotation of the first transmission shaft, so that the second transmission shaft can be rotated, thereby driving the switching shaft to rotate, thereby reducing the number of parts used in the driving structure, which not only saves costs but also reduces the size of the overall driving device.

[0020] In one embodiment, the energy storage assembly includes a first rocker arm, a connecting rod, a rocker, a spring assembly and a second rocker arm. The first rocker arm is fixedly connected to the fourth gear via a third shaft, the connecting rod is rotatably set on the first rocker arm via a fourth shaft, the rocker is rotatably set on the connecting rod via a fifth shaft, the spring assembly is connected to the rocker via a sixth shaft to realize energy storage of the spring assembly, one side of the second rocker arm is connected to the spring assembly to realize energy release of the spring assembly and rotate the second rocker arm, and the other side of the second rocker arm is fixedly connected to the second transmission shaft to realize rotation of the second transmission shaft.

[0021] By adopting the above technical solution, the energy storage component can store and release energy through only some arms, rods and springs. It not only has a low cost but also a fast reaction speed, thereby driving the switching shaft to move quickly within a certain angle.

[0022] In one embodiment, a shock absorbing assembly is provided on the second rocker arm, and the shock absorbing assembly includes a shock absorbing block, a shock absorber and a second fixed base. The shock absorbing block is fixedly provided on the second rocker arm, and the second rocker arm and the second transmission shaft are fixedly connected via a seventh shaft, and the seventh shaft is penetrated on the second fixed base. The shock absorber is provided on the second fixed base so that the shock absorber absorbs excess energy.

[0023] By adopting the above technical solution, it is possible to avoid the spring component releasing too much energy, which would cause the second rocker arm to rotate excessively, thereby causing the switching switch to fail to work properly or even cause damage to the switching switch. Therefore, a shock absorbing component is provided to absorb excess energy.

[0024] In one embodiment, a third bevel gear is fixedly disposed on the third shaft, a fourth bevel gear is meshedly connected to the third bevel gear, and the fourth bevel gear is connected to the gear indication assembly through the eighth shaft to enable the gear indication assembly to display the preselected gear of the selection switch.

[0025] By adopting the above technical solution, after the selection switch is pre-selected, the pre-selected gear position of the selection switch can be intuitively observed through the gear position indication component.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects: 1. By dividing the overall selection switch and transfer switch into multiple phases, each phase is installed on a fixed insulating plate, and a selection shaft is provided between two adjacent selection switches, and the selection shafts are detachably connected. A transfer shaft is provided between two adjacent transfer switches, and the transfer shafts are also detachably connected. Therefore, when the three-phase dry vacuum on-load tap changer needs to be repaired or replaced, the selection shaft or the transfer shaft can be removed first, and the damaged part of the structure can be repaired or replaced, thereby reducing the difficulty of processing and transportation, thereby improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer; 2. Multiple vacuum tubes are set up through the second insulating frame, and the first insulating frame and the second insulating frame are fixed through the connecting frame, which not only strengthens the stability of the switch set on the fixed insulating plate, but also splits the overall bracket into the first insulating frame, the second insulating frame and the connecting frame. Therefore, when the bracket part needs to be repaired, it can be disassembled and the damaged part can be repaired or replaced, thereby reducing the difficulty of processing and transportation of accessories, thereby further improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer; 3. On the basis of realizing the rotation of the first transmission shaft, a part of the structure is added to realize the rotation of the second transmission shaft, thereby driving the rotation of the switching shaft, thereby reducing the number of parts used in the driving structure, not only saving costs but also reducing the volume of the overall driving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a split three-phase dry vacuum on-load tap changer according to an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a selector switch according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a switch according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a driving device according to an embodiment of the present invention; Figure 5 for Figure 4 Side view of.

[0028] In the figure: 1-cabinet, 11-fixed insulating plate, 2-selection switch, 201-screw rod, 202-gear set, 203-nut, 204-support, 205-first bearing seat, 206-moving contact piece, 207-pin shaft, 208-spring, 209-static contact, 2010-conductive rod, 2011-support rod, 3-switching switch, 301-second bearing seat, 302-cam, 303-first insulating frame, 304-connecting frame, 305-second insulating frame, 306-vacuum tube, 307-driving lever, 4-selection shaft, 5-switching shaft, 6-driving device, 601-motor, 602-rotating 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 block, 60313-second fixed base, 60314-shock absorber, 604-first transmission shaft, 605-second transmission shaft, 606-third bevel gear, 607-fourth bevel gear, 608-eighth shaft, 609-gear position indication assembly. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0030] The split three-phase dry vacuum on-load tap changer in the embodiment of the present invention is shown in FIG. Figure 1 As shown, the split three-phase dry vacuum on-load tap changer includes a cabinet 1, on which three fixed insulating plates 11 are vertically arranged; a selection switch 2, each fixed insulating plate 11 is provided with a switching switch 3, a selection shaft 4 is provided between two adjacent selection switches 2 along the distribution direction of the selection switches 2, and the two adjacent selection shafts 4 are detachably connected, and the selection shaft 4 is used to adjust the pre-selected gear of the selection switch 2; a switching switch 3, each fixed insulating plate 11 is provided with a switching switch 3, a switching shaft 5 is provided between two adjacent switching switches 3 in the distribution direction of the switching switches 3, and the two adjacent switching shafts 5 are detachably connected, and the switching shaft 5 is used to adjust the switching gear of the switching switch 3; a driving device 6, which is arranged 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, so as to change the distance between two adjacent selection switches 2 and the switching switch 3, thereby changing the insulation strength; the selection shaft 4 and the switching shaft 5 can be threaded grooves to increase the creepage distance.

[0031] It can be seen that the present invention divides the integral selection switch 2 and the switching switch 3 into multiple phases, each phase is installed on a fixed insulating plate 11, and a selection shaft 4 is provided between two adjacent selection switches 2, and the selection shafts 4 are detachably connected, and a switching shaft 5 is provided between two adjacent switching switches 3, and the switching shafts 5 are also detachably connected. Therefore, when the three-phase dry vacuum on-load tap changer needs to be repaired or replaced, the selection shaft 4 or the switching shaft 5 can be removed first, and the damaged part of the structure can be repaired or replaced, thereby reducing the difficulty of processing and transportation, thereby improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer.

[0032] Preferably, see Figure 2 As shown, a specific structure of a selection switch 2 is provided: The selection switch 2 includes a gear set 202, a screw rod 201, a support member 204, a group of moving contact pieces 206, a group of static contacts 209 and a conductive rod 2010. The screw rod 201 is vertically mounted on the fixed insulating plate 11 through a first bearing seat 205. The screw rod 201 is connected to the selection shaft 4 through a gear set 202 to realize the self-rotation of the screw rod 201. The support member 204 is set on the screw rod 201 through a nut 203 to realize the movement of the support member 204 along the setting direction of the screw rod 201. The top surface of the support member 204 is provided with multiple groups of moving contact pieces 206, and the moving contact pieces 206 include two moving contact pieces 206, a spring 208 and a pin. The shaft 207 is provided with a pin shaft 207, and the pin shaft 207 is sleeved with a spring 208, one end of the spring 208 is against the top of the pin shaft 207, and the other end is against the moving contact piece 206; the static contact 209 group includes a plurality of static 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 dynamic contact piece 206 group is movably arranged on the conductive rod 2010, and the other end is movably arranged on the static contact 209 group; the number of the dynamic contact piece 206 group, the static contact 209 group and the conductive rod 2010 is the same.

[0033] Specifically, the screw rod 201 is fixedly installed on the fixed insulating plate 11 through a plurality of first bearing seats 205, and a bevel gear is provided on the top of the screw rod 201, and a bevel gear is also fixed on the selection shaft 4, and the two bevel gears are meshed and connected to realize the self-rotation of the screw rod 201. The rotation of the screw rod 201 drives the support member 204 to move up and down, thereby driving the moving contact piece 206 group to move up and down. Because the moving contact piece 206 group consists of two pieces, a pin shaft 207 is penetrated by the moving contact piece 206, and a spring 208 is sleeved on the pin shaft 207. Therefore, 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 static contact 209 of the static 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 static contact 209 group, resulting in the moving contact piece 206 being connected to different static contacts 209 to realize the pre-selection of the selection switch 2.

[0034] Preferably, see Figure 3 As shown, a specific structure of a switching switch 3 is provided: The switching switch 3 includes a cam 302 , a vacuum tube 306 and a bracket. The bracket is arranged on the switching shaft 5 through a second bearing seat 301 . Three vacuum tubes 306 are arranged on the bracket. The cam 302 is fixedly arranged on the switching shaft 5 to realize the opening and closing of different vacuum tubes 306 .

[0035] Specifically, pre-selection is first performed through the selection switch 2, and then the cam 302 fixed thereon is driven to rotate through the switching shaft 5, so that the cam 302 drives the vacuum tube 306 to be opened and closed according to the program specified by the cam 302, and the opening and closing order 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 switching order of the three vacuum tubes 306 is that V1 is turned on first, and after a period of time, V2 is turned on, and after a period of time, V1 is disconnected, and after a period of time, V3 is turned on, and after a period of time, V2 is disconnected. The above is the process of the switching switch 3 completing a gear shift; wherein, the vacuum tube 306 is electrically connected to the conductive rod 2010 of the selection switch 2.

[0036] Furthermore, the bracket includes a first insulating frame 303, a second insulating frame 305 and a connecting frame 304. The first insulating frame 303 is arranged on the switching shaft 5 through the second bearing seat 301. A plurality of vacuum tubes 306 are arranged on the second insulating frame 305. The first insulating frame 303 and the second insulating frame 305 are fixedly connected through the connecting frame 304, and the connecting frame 304 is fixedly arranged on the fixed insulating plate 11. The driving lever 307 of the cam 302 is arranged on the first insulating frame 303.

[0037] Specifically, three vacuum tubes 306 are set up through the second insulating frame 305, and the first insulating frame 303 and the second insulating frame 305 are fixed through the connecting frame 304, which not only strengthens the stability of the switching switch 3 set on the fixed insulating plate 11, but also splits the overall bracket into the first insulating frame 303, the second insulating frame 305 and the connecting frame 304. Therefore, when the bracket part needs to be repaired, it can be disassembled and the damaged part can be repaired or replaced, thereby reducing the difficulty of processing and transportation of accessories, thereby further improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer.

[0038] Preferably, see Figure 4 , 5 A specific structure of a driving device 6 is provided: The driving 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 arranged 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 arranged between the switching shaft transmission assembly 603 and the nearest switching shaft 5 to realize the rotation of the switching shaft 5.

[0039] Specifically, the motor 601 drives the first transmission shaft 604 to rotate through the selection shaft 4 transmission assembly, and the first transmission shaft 604 drives the selection shaft 4 to rotate, so the selection shaft 4 can be driven to rotate by the motor 601, the selection shaft 4 transmission assembly and the first transmission shaft 604; the motor 601 drives the second transmission shaft 605 to rotate through the switching shaft transmission assembly 603, and the second transmission shaft 605 drives the switching shaft 5 to rotate, so the switching shaft 5 can be driven to rotate by the motor 601, the switching shaft transmission assembly 603 and the second transmission shaft 605; wherein, the first transmission shaft 604 can also be the selection shaft 4, and the selection shaft 4 and the selection shaft 4 between two adjacent selection switches 2 can be detachably connected, and the second transmission shaft 605 can also be the switching shaft 5, and the switching shaft 5 and the switching shaft 5 between two adjacent switching switches 3 can be detachably connected, so that it is no longer necessary to make a mold for the transmission shaft, thereby reducing the manufacturing cost and the process difficulty. If the transmission shaft is damaged, it only needs to be replaced with a new selection shaft 4 / switching shaft 5, further improving the convenience of repairing or replacing the three-phase dry vacuum on-load tap changer.

[0040] Further, a specific structure of a transmission assembly of a selection shaft 4 is provided: The transmission assembly of the selection 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. The motor 601 is fixedly set on the first fixed base 6023, and the first fixed base 6023 is fixedly set on the cabinet 1. The first bevel gear 6021 is fixedly connected to the driving 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, and 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.

[0041] Specifically, the motor 601 is fixed to the bottom of the first fixed base 6023, and its driving shaft is extended to the top of the first fixed base 6023. The driving 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 driving device 6 can be fixed to the cabinet 1 through the first fixed base 6023 to prevent the driving device 6 from falling during operation.

[0042] Further, a specific structure of a switching shaft transmission assembly 603 is provided: 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 through the first shaft 6024, the fourth gear 6032 is meshingly connected to the third gear 6031, and the fourth gear 6032 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.

[0043] Specifically, the third gear 6031 is fixed between the second bevel gear 6022 and the first gear 6025, that is, it is fixedly set 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; on the basis of realizing the rotation of the first transmission shaft 604, a part of the structure is added to realize the rotation of the second transmission shaft 605, thereby driving the switching shaft 5 to rotate, thereby reducing the amount of parts used in the driving structure, not only saving costs but also reducing the volume of the overall driving device 6.

[0044] Furthermore, the energy storage assembly 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 the fourth gear 6032 via a third shaft 6033, the connecting rod 6036 is rotatably set on the first rocker arm 6034 via a fourth shaft 6035, the rocker arm 6038 is rotatably set 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 realize energy storage of the spring assembly 60310, one side of the second rocker arm 60311 is connected to the spring assembly 60310 to realize energy release of the spring assembly 60310 and rotate the second rocker arm 60311, and the other side of the second rocker arm 60311 is fixedly connected to the second transmission shaft 605 to realize rotation of the second transmission shaft 605.

[0045] Specifically, the fourth gear 6032 drives the first rocker arm 6034 to swing through the third shaft 6033, the first rocker arm 6034 drives the connecting rod 6036 to swing through the fourth shaft 6035, the connecting rod 6036 drives the rocker arm 6038 to swing through the fifth shaft 6037, and the rocker arm 6038 compresses or stretches the spring assembly 60310 through the sixth shaft 6039, thereby converting kinetic energy into elastic potential energy, and the elastic potential energy is released to drive the second rocker arm 60311 to rotate, and the second rocker arm 60311 drives the second transmission shaft 605 to rotate, thereby driving the switching shaft 5 to rotate; the energy storage assembly only needs some arms, rods and springs 208 to realize energy storage and energy release, which not only has a low cost but also a fast reaction speed, thereby driving the switching shaft 5 to move rapidly within a certain angle.

[0046] Furthermore, a shock absorbing assembly is provided on the second rocker arm 60311, and 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 provided on the second rocker arm 60311. The second rocker arm 60311 and the second transmission shaft 605 are fixedly connected via a seventh axis, and the seventh axis is provided on the second fixed base 60313. The shock absorber 60314 is provided on the second fixed base 60313 so that the shock absorber 60314 can absorb excess energy.

[0047] Specifically, during the rotation of the second rocker arm 60311, the shock absorbing block 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, causing the second rocker arm 60311 to rotate excessively, thereby causing the switching switch 3 to fail to work properly or even cause damage to the switching switch 3. Therefore, a shock absorbing assembly is provided to absorb excess energy.

[0048] Preferably, a third bevel gear 606 is fixedly provided on the third shaft 6033 , a fourth bevel gear 607 is meshedly connected to the third bevel gear 606 , and the fourth bevel gear 607 is connected to the gear indicating assembly 609 through the eighth shaft 608 , so that the gear indicating assembly 609 displays the preselected gear of the selection switch 2 .

[0049] Specifically, during the preselection of the selection switch 2, the third bevel gear 606 drives the fourth bevel gear 607 to rotate, and the fourth bevel gear 607 drives the gear indicating component 609 to adjust through the eighth shaft 608. The preselected gear of the selection switch 2 can be intuitively observed through the gear indicating component 609.

[0050] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A split three-phase dry vacuum on-load tap-changer, characterized in that: It includes: A cabinet body (1) on which a plurality of fixed insulating plates (11) are vertically arranged; A selection switch (2), each fixed insulating plate (11) being provided with a switching switch (3), a selection shaft (4) being provided between two adjacent selection switches (2), and the two adjacent selection shafts (4) being detachably connected, and the selection shaft (4) being used to adjust the preselected gear position of the selection switch (2); A switching switch (3), wherein each fixed insulating plate (11) is provided with a switching switch (3), a switching shaft (5) is provided between two adjacent switching switches (3), and the two adjacent switching shafts (5) are detachably connected, and the switching shaft (5) is used to adjust the switching gear position of the switching switch (3); A driving device (6) is arranged on the cabinet (1) to realize the rotation of the selection shaft (4) and the switching shaft (5).

2. The split three-phase dry vacuum on-load tap-changer according to claim 1, characterized in that: The selection switch (2) comprises a gear set (202), a screw rod (201), a support member (204), a movable contact piece (206) set, a stationary contact head (209) set and a conductive rod (2010); the screw rod (201) is vertically mounted on a fixed insulating plate (11) via a first bearing seat (205); the screw rod (201) is connected to the selection shaft (4) via a gear set (202) to enable the screw rod (201) to rotate on its own; The support member (204) is arranged on the screw rod (201) via a screw nut (203) to enable the support member (204) to move along the setting direction of the screw rod (201); A plurality of groups of movable contact pieces (206) are mounted on the top surface of the support member (204), wherein the movable contact piece (206) group comprises two movable contact pieces (206), a spring (208) and a pin shaft (207), wherein the two movable contact pieces (206) are provided with a pin shaft (207), and the pin shaft (207) is sleeved with a spring (208), wherein one end of the spring (208) abuts against the top of the pin shaft (207), and the other end of the spring (208) abuts against the movable contact piece (206); The static contact (209) group comprises a plurality of static contacts (209) vertically arranged on a fixed insulating plate (11); a conductive rod (2010) is vertically arranged on the fixed insulating plate (11) via a support rod (211); one end of the movable contact piece (206) group is movably arranged on the conductive rod (2010), and the other end thereof is movably arranged on the static contact (209) group; The number of the moving contact piece (206) group, the stationary contact head (209) group and the conductive rod (2010) is the same.

3. The split three-phase dry vacuum on-load tap-changer according to claim 1, characterized in that: The switching switch (3) comprises a cam (302), a vacuum tube (306) and a bracket, wherein the bracket is arranged on the switching shaft (5) via a second bearing seat (301), a plurality of vacuum tubes (306) are arranged on the bracket, and the cam (302) is fixedly arranged on the switching shaft (5) to realize the switching of different vacuum tubes (306).

4. The split three-phase dry vacuum on-load tap-changer according to claim 3, characterized in that: The bracket comprises a first insulating frame (303), a second insulating frame (305) and a connecting frame (304); the first insulating frame (303) is arranged on the switching shaft (5) via a second bearing seat (301); a plurality of vacuum tubes (306) are arranged on the second insulating frame (305); the first insulating frame (303) and the second insulating frame (305) are fixedly connected via the connecting frame (304); the connecting frame (304) is fixedly arranged on the fixed insulating plate (11); and a driving lever (307) of the cam (302) is arranged on the first insulating frame (303).

5. The split three-phase dry vacuum on-load tap-changer according to claim 1, characterized in that: The driving device (6) comprises a motor (601), a selection shaft (4) transmission assembly and a switching shaft transmission assembly (603); a first transmission shaft (604) is arranged between the selection shaft (4) transmission assembly and the nearest selection shaft (4) to realize the rotation of the selection shaft (4); and a second transmission shaft (605) is arranged between the switching shaft transmission assembly (603) and the nearest switching shaft (5) to realize the rotation of the switching shaft (5).

6. The split three-phase dry vacuum on-load tap-changer according to claim 5, characterized in that: The selection shaft (4) transmission assembly comprises 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 arranged on the first fixed base (6023), and the first fixed base (6023) is fixedly arranged 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 meshingly connected to 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) is meshingly connected to the first gear (6025); and 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).

7. The split three-phase dry vacuum on-load tap-changer according to claim 6, characterized in that: The switching shaft transmission assembly (603) comprises 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 the first shaft (6024). The fourth gear (6032) is meshingly connected to the third gear (6031). The fourth gear (6032) is connected to the energy storage assembly so that the energy storage assembly can store energy. The energy storage assembly is connected to the second transmission shaft (605) so that the energy storage assembly can release energy and rotate the second transmission shaft (605).

8. The split three-phase dry vacuum on-load tap-changer according to claim 7, characterized in that: The energy storage assembly comprises 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 arranged on the first rocker arm (6034) via a fourth shaft (6035); the rocker arm (6038) is rotatably arranged on the connecting rod (60311) via a fifth shaft (6037). 6), the spring assembly (60310) is connected to the rocker (6038) through the sixth shaft (6039) to achieve energy storage of the spring assembly (60310), one side of the second rocker arm (60311) is connected to the spring assembly (60310) to achieve energy release of the spring assembly (60310) and rotation of the second rocker arm (60311), and the other side of the second rocker arm (60311) is fixedly connected to the second transmission shaft (605) to achieve rotation of the second transmission shaft (605).

9. The split three-phase dry vacuum on-load tap-changer according to claim 8, characterized in that: The second rocker arm (60311) is provided with a shock absorbing assembly, which includes a shock absorbing block (60312), a shock absorber (60314) and a second fixed base (60313); the shock absorbing block (60312) is fixedly arranged on the second rocker arm (60311); the second rocker arm (60311) and the second transmission shaft (605) are fixedly connected via a seventh shaft, and the seventh shaft is penetrated on the second fixed base (60313); the shock absorber (60314) is arranged on the second fixed base (60313) so that the shock absorber (60314) absorbs excess energy.

10. The split three-phase dry vacuum on-load tap-changer according to claim 8, characterized in that: A third bevel gear (606) is fixedly arranged on the third shaft (6033), a fourth bevel gear (607) is meshingly connected to the third bevel gear (606), and the fourth bevel gear (607) is connected to the gear position indicating assembly (609) via the eighth shaft (608), so that the gear position indicating assembly (609) displays the pre-selected gear position of the selection switch (2).

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