CN115020131A - Vacuum tube driving device and on-load tap-changer - Google Patents

Abstract

The invention provides a vacuum tube driving device and an on-load tap-changer, the device comprises: the device comprises an upper supporting plate, a lower supporting plate, a cam disc, a first transmission mechanism, a lifting mechanism and a vacuum tube; the lifting mechanism is arranged between the upper supporting plate and the lower supporting plate in a position-adjustable mode along the axial direction of the upper supporting plate, one end of the vacuum tube is connected with the upper supporting plate, and the other end of the vacuum tube is connected with the lifting mechanism; the cam disc is provided with an end face cam molded line arranged along the circumferential direction of the cam disc, the end face cam molded line is respectively connected with the power input end of the first transmission mechanism, the first transmission mechanism is provided with a plurality of first power output ends, and each first power output end is respectively connected with the lifting mechanism. The first transmission mechanism can simultaneously control the on-off of a plurality of vacuum tubes, so that the space utilization rate is improved, and the problem that the existing vacuum tube driving device needs larger space when the number of the vacuum tubes is larger due to the fact that the single lever is adopted to control the on-off of the single vacuum tube is solved.

Description

Vacuum tube driving device and on-load tap-changer

Technical Field

The invention relates to the technical field of on-load tap changers, in particular to a vacuum tube driving device and an on-load tap changer.

Background

The on-load tap-changer is an indispensable and only core component with frequent actions of an alternating current engineering transformer and a direct current engineering converter transformer, and plays an irreplaceable role in keeping the voltage stability of a power grid, optimizing the power flow distribution and the like. Particularly for direct current engineering, the realization of the on-load tap changer is a necessary key component for direct current transmission power regulation and economic and flexible operation. The vacuum tube mechanism is used as an important component of a switching core of the on-load tap-changer, and the working principle of the vacuum tube mechanism is that a vacuum tube driving mechanism is driven to act through a transmission rotating shaft to control the vacuum tube to be switched on and off, so that the contact and the separation of a moving contact and a fixed contact in a vacuum arc extinguish chamber are realized, the current switching-on and the vacuum arc extinguish are completed, and finally the switching-on and switching-off function in a circuit topological diagram is realized.

At present, most of vacuum tube driving devices used in on-load tap changers at home and abroad are different in matching of a cam and a lever, and a central rotating shaft rotates to drive the cam to rotate and transmit motion to a lever mechanism through a roller so as to drive the vacuum tube to be switched on and off. The cam comprises a cylindrical cam, a circumferential cam and an end face cam which are in existence at present, and the lever is divided into a lever and a lever end part with or without a roller, namely the lever is not arranged, the lever is arranged and whether the roller is arranged at the lever end part with the lever or not is judged. According to the requirements of different tap changer operation environments, different cam and lever combinations are selected to improve the operation efficiency and reliability of the tap changer.

In order to reduce the driving force and improve the axial lifting precision, a lever is often used in a vacuum tube driving mechanism, a roller is arranged at the end part of the lever to reduce abrasion, and a guide sleeve structure is used for ensuring the axial precision of lifting the vacuum tube up and down by the lifting rod.

Disclosure of Invention

In view of the above, the invention provides a vacuum tube driving device and an on-load tap changer, and aims to solve the problem that the existing vacuum tube driving device needs a large space when the number of vacuum tubes is large due to the fact that a single lever is adopted to control the single vacuum tube to be switched on and switched off.

In one aspect, the present invention provides a vacuum tube driving apparatus, including: the device comprises an upper supporting plate, a lower supporting plate, a cam disc, a first transmission mechanism, a lifting mechanism and a vacuum tube; the lifting mechanism is arranged between the upper supporting plate and the lower supporting plate in a position-adjustable mode along the axial direction of the upper supporting plate, one end of the vacuum tube is connected with the upper supporting plate, and the other end of the vacuum tube is connected with the lifting mechanism; the cam disc is rotatably arranged on the lower supporting plate, and an end face cam profile arranged along the circumferential direction of the cam disc is arranged on the cam disc; the power input end of the first transmission mechanism is matched with the profile of the end face cam, the first transmission mechanism is provided with a plurality of first power output ends, each first power output end is respectively connected with the corresponding lifting mechanism, when the cam disc rotates, the cam disc drives the profile of the end face cam to synchronously rotate, and further the profile of the end face cam carries out power input on the power input end of the first transmission mechanism, so that the plurality of lifting mechanisms are driven to synchronously carry out position adjustment, and the vacuum tubes are synchronously switched on and off at the same time.

Further, in the vacuum tube driving apparatus, the face cam profile includes: at least two lugs arranged at intervals along the circumferential direction of the cam plate; wherein a groove is formed between any two adjacent bumps.

Further, in the vacuum tube driving device, the end wall surface of the projection is a cam slope structure, and the gradient of the cam slope structure is determined based on the pulling speed of the vacuum tube.

Further, in the vacuum tube driving device, the first transmission mechanism includes: the first roller, the double lifting lever and the support frame; wherein the support frame is arranged on the lower support plate; the double lifting levers are provided with power input ends, the double lifting levers are also provided with two power output ends positioned on the same side, and the power output ends of the double lifting levers and the power input ends of the double lifting levers are positioned on two opposite sides; the double lifting levers are rotatably arranged on the support frame at the middle position between the power output end and the power input end of the double lifting levers, and the power input ends of the double lifting levers are rotatably connected with the first idler wheel and are used for being pressed against and contacted with the end face cam profile; when the cam disc rotates and drives the end face cam molded line to synchronously rotate, the first roller is synchronously adjusted in height along with the height change of the end face cam molded line so as to input power to the single lifting lever, the single lifting lever swings, and the power output end of the single lifting lever can be used for jacking the lifting mechanism to adjust the vertical position of the lifting mechanism.

Further, the vacuum tube driving device further comprises: a second transmission mechanism; the end cam molded lines are multiple and are distributed in sequence from the axis to the periphery along the radial direction of the cam disc, and part of the end cam molded lines are matched with the power input end of the first transmission mechanism; the other part of the end face cam molded line is matched with a power input end of the second transmission mechanism, the second transmission mechanism is provided with a second power output end, the second power input end is connected with the corresponding lifting mechanism, when the cam disc rotates, the cam disc drives the end face cam molded line to synchronously rotate, and then the end face cam molded line carries out power input on the power input end of the second transmission mechanism matched with the end face cam molded line, so that the lifting mechanism is driven to carry out position adjustment, and the vacuum tube is switched between on and off.

Further, in the vacuum tube driving device, the second transmission mechanism includes: the second roller, the single lifting lever and the supporting seat; wherein, the supporting seat is arranged on the lower supporting plate; the single lifting lever is arranged on the supporting seat in a rotatable mode at the middle position between the power output end and the power input end of the single lifting lever, the power input end of the single lifting lever is rotatably connected with the second roller, the second roller is used for being in abutting contact with the end face cam profile, when the cam disc rotates and drives the end face cam profile to rotate synchronously, the second roller is subjected to synchronous height adjustment along with the height change of the end face cam profile so as to perform power input on the single lifting lever, the single lifting lever swings, and the power output end of the single lifting lever can be used for abutting against the lifting mechanism to enable the lifting mechanism to perform vertical position adjustment.

Further, in the vacuum tube driving device, the lifting mechanism includes: the guide sleeve is positioned between the upper supporting plate and the lower supporting plate and is arranged on the lower supporting plate; the lifting rod penetrates through the guide sleeve in a sliding mode along the axial direction of the guide sleeve.

Furthermore, in the vacuum tube driving device, the guide sleeve and the lifting rod are both provided with waist-shaped through holes, and the first power output end or the second power output end is movably arranged in the waist-shaped through holes in a penetrating manner; the first power output end or the second power output end is further provided with a waist-shaped mounting hole, the lifting rod is provided with a connecting shaft, the connecting shaft is connected with the first power output end or the second power output end in a sliding mode along the length direction of the waist-shaped mounting hole, and the lifting rod is driven to slide along the axial direction of the guide sleeve when the first power output end or the second power output end carries out circular motion.

Further, in the vacuum tube driving device, when the cam disc rotates, at least one of the first transmission mechanisms and at least one of the second transmission mechanisms perform a staggered motion under the action of the profile of the end face cam, or at least two of the first transmission mechanisms perform a staggered motion under the action of the profile of the end face cam, or at least two of the second transmission mechanisms perform a staggered motion under the action of the profile of the end face cam, so that the staggered driving of a plurality of vacuum tubes is realized.

Furthermore, in the vacuum tube driving device, each of the lifting mechanisms is further connected with a resetting mechanism for applying a resetting force to the lifting mechanism so as to move the lifting mechanism in a direction close to the upper support plate, so that the vacuum tube is closed.

Furthermore, in the vacuum tube driving device, the cam disc is provided with a rotating shaft for driving the cam disc to rotate.

In another aspect, the invention also provides an on-load tap changer provided with the vacuum tube driving device.

According to the vacuum tube driving device and the on-load tap changer, the second transmission mechanism is connected with the end face cam molded line on the cam disc, so that the vertical position adjustment of the lifting mechanism is realized, the vacuum tubes are driven to be switched, particularly, the second transmission mechanism can control the on-off of a plurality of vacuum tubes simultaneously, the space utilization rate is improved, and the problem that when the number of the vacuum tubes is large, the requirement for large space is met due to the fact that the single lever is adopted to control the on-off of the single vacuum tube in the conventional vacuum tube driving device is solved. Simultaneously, the device also has the following advantages:

firstly, the staggered driving of a single cam disc to a plurality of levers can be realized by utilizing the bumps and the grooves which are arranged at different radial positions on the single cam disc at intervals, so that the lifting accuracy is improved;

secondly, the driving device is small in impact, high in reliability and long in service life.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a vacuum tube driving device according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a vacuum tube driving device according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another direction of the vacuum tube driving device provided in the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a partial position of a vacuum tube driving device according to an embodiment of the present invention.

Description of reference numerals:

1-upper supporting plate, 2-lower supporting plate, 3-rotating shaft, 4-cam disc, 41-end cam profile, 4101-first end cam profile, 4102-second end cam profile, 4103-third end cam profile, 411-convex block, 412-groove, 5-first transmission mechanism, 501-first transmission mechanism A, 502-first transmission mechanism B, 51-first roller, 52-single lifting lever, 53-supporting seat, 6-second transmission mechanism, 61-second roller, 62-double lifting lever, 63-supporting frame, 7-lifting mechanism, 701-first lifting mechanism, 702-second lifting mechanism, 704-third lifting mechanism, 703-fourth lifting mechanism, 71-lifting rod, 72-guide sleeve, 73-waist-shaped through hole, 8-vacuum tube, 801-first vacuum tube, 802-second vacuum tube, 803-third vacuum tube, 804-fourth vacuum tube, 9-resetting mechanism, 901-first resetting mechanism, 902-second resetting mechanism, 903-third resetting mechanism and 904-fourth resetting mechanism.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Vacuum tube drive device embodiment:

referring to fig. 1 to 4, a preferred structure of a vacuum tube driving apparatus provided by an embodiment of the present invention is shown. As shown, the apparatus comprises: the device comprises an upper supporting plate 1, a lower supporting plate 2, a rotating shaft 3, a cam plate 4, a first transmission mechanism 6, a lifting mechanism 7 and a vacuum tube 8; wherein the content of the first and second substances,

the upper supporting plate 1 and the lower supporting plate 2 are arranged at intervals, the lifting mechanism 7 is arranged between the upper supporting plate 1 and the lower supporting plate 2 in a position-adjustable mode along the axial direction (the vertical direction shown in fig. 2) of the upper supporting plate 1, one end (the upper end shown in fig. 2) of the vacuum tube 8 is connected with the upper supporting plate 1, and the other end (the lower end shown in fig. 2) of the vacuum tube is connected with the lifting mechanism 7. Specifically, the upper support plate 1 and the lower support plate 2 may be both of a disc structure and arranged in parallel and at intervals along the axial direction, that is, the two are coaxially arranged, and can support and fix each component. In this embodiment, the vacuum tube 8 may be multiple, and it may be supported by the upper support plate 1, i.e. the upper support plate 1 is used as a support for the vacuum tube 8. The lifting mechanism 7 can be arranged between the upper support plate 1 and the lower support plate 2 in a position-adjustable manner along the axial direction of the upper support plate 1 so as to drive the vacuum tube 8 and realize switching between closing and opening of the vacuum tube 8. In the present embodiment, the pulling mechanism 7 may be provided in one-to-one correspondence with the vacuum tubes 8, and the pulling mechanism 7 may be provided directly below the corresponding vacuum tube 8 so as to directly drive the vacuum tube 8 by the pulling mechanism 7. Wherein, the lifting mechanism 7 and the vacuum tube 8 can be arranged along the axial direction of the upper supporting plate 1. In this embodiment, the lower end of the vacuum tube 8 can be connected with the upper end of the pulling mechanism 7 by a screw thread, for example, the lower end of the vacuum tube 8 can be provided with a threaded hole, the upper end of the pulling mechanism 7 is provided with a matching threaded rod, and the upper end of the vacuum tube 8 can be fixedly connected to the upper support plate 1 by a connecting member (not shown in the figure). The lower end of the vacuum tube 8 can be connected to a moving contact of the vacuum tube 8, the upper end of the vacuum tube 8 can be connected to a stationary contact of the vacuum tube 8, and the moving contact moves along an axial direction (vertical direction as shown in fig. 2) of the vacuum tube 8 under the action of the pulling mechanism 7 to move close to the stationary contact until contacting with the stationary contact to realize closing, or moves away from the stationary contact to disconnect the moving contact and the stationary contact to realize switching, that is, switching between closing and opening is completed, that is, switching between opening and closing actions.

For example, the device shown in fig. 2 includes four vacuum tubes 8, that is, the device belongs to a driving device for a single-phase four-vacuum tube of an on-load tap-changer, the four vacuum tubes 8 are respectively a first vacuum tube 801, a second vacuum tube 802, a third vacuum tube 803 and a fourth vacuum tube 804, which are circumferentially distributed along the circumferential direction of the upper support plate 1 from left to right and can be arranged at equal intervals, and the top ends of the first vacuum tube 801, the second vacuum tube 802, the third vacuum tube 803 and the fourth vacuum tube 804 are all fixedly connected to the upper support plate 1 through connecting pieces; the four pulling mechanisms 7 are respectively a first pulling mechanism 701, a second pulling mechanism 702, a third pulling mechanism 703 and a fourth pulling mechanism 704, which are respectively arranged under the first vacuum tube 801, the second vacuum tube 802, the third vacuum tube 803 and the fourth vacuum tube 804, and the top ends of the first pulling mechanism 701, the second pulling mechanism 702, the third pulling mechanism 703 and the fourth pulling mechanism 704 are respectively connected with the bottom ends of the first vacuum tube 801, the second vacuum tube 802, the third vacuum tube 803 and the fourth vacuum tube 804 through threads so as to respectively drive the first vacuum tube 801, the second vacuum tube 802, the third vacuum tube 803 and the fourth vacuum tube 804 to switch. In the present embodiment, the four vacuum tubes 8 are one phase, and multiple phases can be provided for simultaneous driving; the number of vacuum tubes 8 in each phase may be other numbers, and is not limited in this embodiment.

The cam disc 4 is rotatably arranged on the lower support plate 2, and the cam disc 4 is provided with an end cam profile 41 arranged in the circumferential direction of the cam disc 4. Specifically, the cam disc 4 may be a disc structure, and is coaxially disposed on the lower support plate 2, and the cam disc 2 and the lower support plate 2 are rotatably connected to each other to serve as a drive disc for driving the first transmission mechanism 6 to move; a top wall (relative to the position shown in fig. 2) of the cam plate 4 is provided with a facing cam profile 41, and the facing cam profile 41 is adapted to the first transmission mechanism 6 to drive the first transmission mechanism 6 to operate. In the present embodiment, in order to facilitate the driving of the rotation of the cam disc 4, preferably, the cam disc 4 is connected with a rotating shaft 3 for connecting a driving motor (not shown in the figure) to rotate the cam disc 4 by the driving motor, so that the cam disc 4 and the rotating shaft 3 rotate synchronously; the rotating shaft 3 and the cam disc 4 can be coaxially arranged, and the rotating shaft 3 is also coaxially arranged with the upper supporting plate 1 and the lower supporting plate 2, that is, the upper supporting plate 1, the lower supporting plate 2, the rotating shaft 3 and the cam disc 4 are coaxially arranged, and the rotating shaft 3 is rotatably arranged through the upper supporting plate 1 and the lower supporting plate 2 so as to be capable of rotating by driving the rotating shaft 3 through the driving motor.

The power input end of the first transmission mechanism 6 is matched with the end face cam molded line 41, the first transmission mechanism 6 is provided with a plurality of first power output ends which move synchronously, each first power output end is respectively connected with the corresponding lifting mechanism 7, the first transmission mechanism 6 is used for driving the plurality of lifting mechanisms 7 to synchronously perform position adjustment under the action of the end face cam molded line 41 so as to realize the synchronous switching between the closing and the opening of the plurality of vacuum tubes 8, when the cam disc 4 rotates, the cam disc 4 drives the end face cam molded line 41 to synchronously rotate, and further the end face cam molded line 41 performs power input on the power input end of the first transmission mechanism 6, so that the plurality of lifting mechanisms 7 are driven to synchronously perform position adjustment, and the plurality of vacuum tubes 8 are synchronously switched between the closing and the opening. Specifically, the power input end of the first transmission mechanism 6 may be matched with the end cam profile 41, and the end cam profile 41 may perform height change when the cam disc 4 rotates, so as to drive the first transmission mechanism 6 to move; the first transmission mechanism 6 can be provided with at least two first power output ends which move synchronously, so that when the first transmission mechanism 6 moves, the first power output ends can move synchronously and simultaneously, and further the lifting mechanisms 7 corresponding to the first power output ends are driven to carry out synchronous position adjustment, thereby realizing synchronous and simultaneous switching of the vacuum tubes 8.

With continued reference to fig. 1-4, the apparatus further comprises: a second transmission mechanism 5; the end cam molded lines 41 are at least two, wherein one part of the end cam molded lines is in one-to-one correspondence with the first transmission mechanisms 6 and is connected with the power input end corresponding to the first transmission mechanisms 6, the other part of the end cam molded lines is in one-to-one correspondence with the second transmission mechanisms 5 and is connected with the power input end corresponding to the second transmission mechanisms 5, the second transmission mechanisms 5 are provided with a second power output end which is connected with the corresponding lifting mechanism 7, when the cam disc 4 rotates, the cam disc 4 drives the end cam molded lines 41 to rotate synchronously, and then the end cam molded lines 41 carry out power input on the power input end of the second transmission mechanism 5 matched with the end cam molded lines 41, so that the lifting mechanism 7 is driven to carry out position adjustment, and switching between closing and opening of the vacuum tube 8 is realized.

Specifically, the end cam profile 41 may be plural and arranged in order from the axis to the outer periphery of the cam plate 4 in the radial direction of the cam plate 4; wherein, the number of the end cam profiles 41 is adapted to the sum of the numbers of the second transmission mechanisms 5 and the first transmission mechanisms 6, that is, a part of the end cam profiles 41 corresponds to the second transmission mechanisms 5, that is, each second transmission mechanism 5 is provided with an end cam profile 41 correspondingly, and the power input end of each second transmission mechanism 5 is connected with the corresponding end cam profile 41 respectively, so as to drive the second transmission mechanism 5 to move when the height of the end cam profile 41 changes when the cam disc 4 rotates, and the other part of the end cam profile 41 corresponds to the first transmission mechanism 6, that is, each first transmission mechanism 6 is provided with an end cam profile 41 correspondingly, and the power input end of each first transmission mechanism 6 is connected with the corresponding end cam profile 41 respectively, so as to perform the height change when the end cam profile 41 rotates on the cam disc 4, the first transmission mechanism 6 is driven to move. The number of the second transmission mechanism 5 and the first transmission mechanism 6 can be at least one, and the number of the second transmission mechanism and the first transmission mechanism can be determined according to actual conditions, and is not limited in this embodiment; and the power output ends of the two are in one-to-one correspondence with the lifting mechanisms 7. In the present embodiment, in order to avoid interference between the second transmission mechanism 5 and the first transmission mechanism 6, it is preferable that the second transmission mechanism 5 and the first transmission mechanism 6 are distributed along the radial direction of the cam plate 4, and the second transmission mechanism 5 and the first transmission mechanism 6 are arranged at an included angle. In this embodiment, at least two end cam profiles arranged at different radial positions on a single cam disc are used to realize the driving of the single cam disc to the second transmission mechanism 5 and the first transmission mechanism 6, that is, the staggered driving of a plurality of vacuum tubes, so as to meet the requirement of the switching timing sequence of the plurality of vacuum tubes.

For example, in the apparatus shown in fig. 2, three facing cam profiles 41, i.e., a first facing cam profile 4101, a second facing cam profile 4102, and a third facing cam profile 4103, are provided on the top wall of the cam disc 4 in this order from the outer periphery to the axial position in the radial direction of the cam disc 4, that is, the first facing cam profile 4101 is provided at the outermost end, the second facing cam profile 4102 is provided at the middle, and the third facing cam profile 4103 is provided at the innermost end; the device shown in fig. 2 comprises a first transmission mechanism 6 and two second transmission mechanisms 5, wherein the two second transmission mechanisms 5 can be respectively arranged at two sides of the first transmission mechanism 6 and respectively comprise a first transmission mechanism 501 and a second transmission mechanism B502, the first transmission mechanism 501 is connected with a middle second end face cam molded line 4102, the second transmission mechanism B502 is connected with an innermost third end face cam molded line 4103, and the first transmission mechanism 6 is connected with an outermost first end face cam molded line 4101; moreover, the first transmission mechanism 6 has two first power output ends, and the second transmission mechanism a 501, the second transmission mechanism b 502 and one first transmission mechanism 6 have four power output ends in total, wherein the second power output end of the second transmission mechanism a 501 is connected with the first lifting mechanism 701, and the two first power output ends of the first transmission mechanism 6 are respectively connected with the second lifting mechanism 702 and the third lifting mechanism 703, so that the second lifting mechanism 702 and the third lifting mechanism 703 perform synchronous motion, and further drive the second vacuum tube 802 and the third vacuum tube 803 at the same time; the second power output end of the second transmission mechanism B502 is connected with the fourth pulling mechanism 704.

With continued reference to fig. 4, in order to ensure the stability of the closing of the vacuum tube 8, it is preferable that a return mechanism 9 is connected to each of the pulling mechanisms 7 for applying a return force (an upward force as shown in fig. 2) to the pulling mechanism 7 to move the pulling mechanism 7 in a direction close to the upper support plate 1 (an upward movement as shown in fig. 2) to close the vacuum tube 8, so as to avoid the phenomenon that the vacuum tube 8 is difficult to close only by the first transmission mechanism 6 or the second transmission mechanism 5 when the vacuum tube 8 is heavy. Specifically, the reset mechanisms 9 correspond to the lifting mechanisms 7 one to one, the reset mechanisms 9 can store energy when the lifting mechanisms 7 move in a direction away from the upper support plate 1, that is, move downwards, and release energy and apply reset force, that is, reverse thrust force to the lifting mechanisms 7 when the first transmission mechanism 6 or the second transmission mechanism 5 drives the lifting mechanisms 7 to move upwards, so that the lifting mechanisms 7 can move upwards to a reset position, and then the lower ends of the vacuum tubes 8 are driven to move to close the vacuum tubes 8. In this embodiment, the return mechanism 9 may be a return spring, and may be disposed below the lower support plate 2, and both ends of the return spring are respectively clamped between the lower support plate 2 and an end portion (bottom end as shown in fig. 4) of the lifting rod 71 disposed below the lower support plate 2 in the lifting mechanism 7, and the lower end of the return spring is connected to the bottom end of the lifting rod 71; this reset spring can be tension spring, and the interval between the lower extreme of lifting rod 71 and lower support plate 2 grow when lifting rod 71 moves down promptly, and reset spring energy storage to apply ascending reset force to the bottom of lifting rod 71 on, make lifting rod 71 move up to the closure. Of course, in other embodiments, the return spring may be disposed above the lower support plate 2, and the lifting rod 71 is disposed above the lower support plate 2 with a limit table, and the return spring is disposed between the lower support plate 2 and the limit table as a compression spring to compress the stored energy when the lifting rod 71 moves downward, and may apply an upward return force, i.e., a reverse thrust, to the lifting rod 71, so that the lifting rod 71 returns upward to be closed.

For example, the device shown in fig. 4 includes four reset mechanisms 9, which are a first reset mechanism 901, a second reset mechanism 902, a third reset mechanism 903, and a fourth reset mechanism 904, respectively, and are connected to the first pulling mechanism 701, the second pulling mechanism 702, the third pulling mechanism 703, and the fourth pulling mechanism 704, respectively, to apply reset forces to the first pulling mechanism 701, the second pulling mechanism 702, the third pulling mechanism 703, and the fourth pulling mechanism 704, respectively, so as to close the first vacuum tube 801, the second vacuum tube 802, the third vacuum tube 803, and the fourth vacuum tube 804.

When the cam disc 4 rotates, the first transmission mechanism 6 and the second transmission mechanism 5 perform staggered movement under the action of the end face cam molded line 41 to drive the lifting mechanism 7 to perform staggered position adjustment, so that staggered driving of the vacuum tubes 8 is realized. Specifically, according to the switching timing requirements of the vacuum tubes 8, in combination with the position arrangement between different end cam profiles 41, at the same time, the power input ends of at least two transmission mechanisms of the first transmission mechanism 6 and the second transmission mechanism 5 are arranged at different height positions, that is, at different height positions of different end cam profiles 41, so that different vacuum tubes 8 are partially closed and partially disconnected, and when the cam disc 4 rotates, the transmission mechanisms are sequentially driven to perform staggered motion, so that the staggered drive of the first transmission mechanism 6 and the second transmission mechanisms 5 is realized, and further, the plurality of lifting mechanisms 7 are driven to perform staggered motion, thereby realizing the staggered drive among the vacuum tubes 8.

For example, in the device shown in fig. 2, in the initial state in fig. 2, the power input end of the second transmission mechanism a 501 is arranged at the high position of the middle second end face cam molded line 4102, the power input end of the first transmission mechanism 6 is arranged at the high position of the first end face cam molded line 4101 at the outermost circle, and the second transmission mechanism b 502 is arranged at the low position of the third end face cam molded line 4103 at the innermost circle, at this time, the first vacuum tube 801 is initially opened, the fourth vacuum tube 804 is initially closed, and the second vacuum tube 802 and the third vacuum tube 803 are initially opened; when the rotating shaft 3 drives the cam plate 4 to rotate forward (counterclockwise as shown in fig. 2), the power input end of the first transmission mechanism 6 moves to the low position under the action of the first end surface cam profile 4101 in the cam plate 4, so that the two first power output ends of the first transmission mechanism 6 respectively drive the second lifting mechanism 702 and the third lifting mechanism 703 to move upward, and simultaneously, the second resetting mechanism 902 and the third resetting mechanism 903 respectively apply resetting force to respectively reset the second lifting mechanism 702 and the third lifting mechanism 703 to move upward, so that the second vacuum tube 802 and the third vacuum tube 803 are closed; then the power input end of the second transmission mechanism B502 moves to a high position under the action of a third end face cam molded line 4103 in the cam plate 4, so that the second power output end of the second transmission mechanism B502 drives the fourth pulling mechanism 704 to move downwards, and meanwhile, the fourth resetting mechanism 904 is charged with energy, so that the fourth vacuum tube 804 is disconnected; then, the power input end of the second transmission mechanism a 501 moves to a low position under the action of the second end face cam molded line 4102 in the cam disc 4, so that the second power output end of the second transmission mechanism a 501 drives the first lifting mechanism 701 to move upwards, and meanwhile, the first resetting mechanism 901 applies resetting force to pull back the first lifting mechanism 701 so as to close the first vacuum tube 801; finally, the first transmission mechanism 6 moves under the action of the cam plate 4, so that the two first power output ends of the first transmission mechanism 6 respectively drive the second pulling mechanism 702 and the third pulling mechanism 703 to move downwards, and simultaneously, the second resetting mechanism 902 and the third resetting mechanism 903 store energy, so that the second vacuum tube 802 and the third vacuum tube 803 are disconnected, and the subsequent operations are repeated in sequence to complete the staggered switching drive between the disconnection and the connection of each vacuum tube 8.

With continued reference to fig. 2, each face cam profile 41 includes: at least two bumps 411; wherein the lugs 411 are arranged at intervals in the circumferential direction of the cam plate 4, and a groove 412 is formed between any two adjacent lugs 411. Specifically, at least two protrusions 411 and at least two grooves 412 are arranged in sequence at intervals on the same circumference; to avoid the jamming of the power input ends of the first transmission mechanism 6 and the second transmission mechanism 5, the end wall of the protrusion 411 is preferably in a cam slope structure, and the slope of the cam slope structure can be determined based on the required pulling speed of the vacuum tube 8, for example, the slope is steep. The protrusion 411 may be a trapezoid structure, and the groove may also be a trapezoid groove structure. Of course, in other embodiments, there may be one protrusion 411 and one groove.

For example, in the arrangement shown in fig. 2, three face cam profiles 41 each include three protrusions 411 and three recesses 412; the central angle of each protrusion 411 and each groove 412 can be determined according to actual conditions. The ends of the protrusions 411 of the first end face cam profile 4101 and the third end face cam profile 4103 may be arranged in parallel, the ends of the second end face cam profile 4102 may be arranged in a staggered manner with respect to the ends of the first end face cam profile 4101 and the third end face cam profile 4103, the staggered angle may be determined according to practical situations, for example, the staggered angle and the included angle between the first transmission mechanism 6 and the second transmission mechanism 5 are all adapted to the staggered timing sequence between the vacuum tubes 8, and the staggered angle is not limited in this embodiment. In this embodiment, the three bumps 411 correspond to one phase vacuum tube 8, and the three bumps 411 may be provided with three phase vacuum tubes 8, that is, the three phase vacuum tubes 8 may be driven simultaneously, or only one phase or two phases may be provided, and the three bumps may be driven by the whole rotation or reciprocating rotation of the cam plate 4.

With continued reference to fig. 2, the second transmission 5 comprises: a second roller 51, a single lifting lever 52 and a supporting seat 53; wherein, the supporting seat 53 is arranged on the lower supporting plate 2, the middle position of the single pulling lever 52 is rotatably arranged on the supporting seat 51, and the power input end of the single pulling lever 52 is rotatably connected with the second roller 51, such as pivoted, for abutting and contacting on the end cam profile 41, when the cam disc 4 rotates and drives the end cam profile 41 to rotate synchronously, the second roller 51 performs synchronous height adjustment along with the height change of the end cam profile 41, so as to perform power input on the single pulling lever 52, so that the single pulling lever 52 swings, and the power output end of the single pulling lever 52 can press the pulling mechanism 7 to adjust the vertical position of the pulling mechanism 7.

Specifically, the support base 53 may be provided on the lower support plate 2, for example, fixed to the lower support plate 2 by bolts. The intermediate position of the single pull lever 52, i.e. the position between the power output and the power input, may be mounted on the support base 53, and the single pull lever 52 may be rotatable with respect to the support base 53, e.g. pivotally connected to the support base 53 by means of a first support shaft 54; one end (the left lower end as shown in fig. 2) of the single pulling lever 52 is used as a power input end, a second roller 51 is connected, the second roller 51 is in contact with the corresponding end cam profile 41 to drive the single pulling lever 52 to rotate along with the rotation of the cam disc 4, and then the other end of the single pulling lever 52 moves upwards or downwards according to the lever principle; the purpose of the second roller 51 is to further facilitate shock absorption and friction reduction. The second roller 51 and the power input end of the single pulling lever 52 can be connected through a bearing and a snap spring, that is, a bearing is arranged between the second roller 51 and the power input end of the single pulling lever 52, and the snap spring is arranged outside the bearing. The other end (the upper right end as viewed in fig. 2) of the single pulling lever 52 serves as a second power output end, and the second power output end is connected to the pulling mechanism 7 so as to drive the pulling mechanism 7 to perform position adjustment in the vertical direction, i.e., to move upward or downward, when the single pulling lever 52 rotates. In this embodiment, the structure of the second transmission mechanism b 502 is taken as an example to describe the second transmission mechanism 5, and the structure of the second transmission mechanism a 501 is the same as that of the second transmission mechanism b 502, which is not described herein again.

With continued reference to fig. 2 and 3, the first transmission mechanism 6 includes: a first roller 61, a double lifting lever 62 and a support bracket 63; wherein, the supporting frame 63 is disposed on the lower supporting plate 2, the double-pulling lever 62 is provided with a power input end and two power output ends located on the same side, the power output end and the power input end of the double-pulling lever 62 are located on opposite sides (upper and lower sides as shown in fig. 2), the middle position between the power output end and the power input end of the double-pulling lever 62 on the double-pulling lever 62 is rotatably disposed on the supporting frame 63, the power input end of the double-pulling lever 62 is rotatably connected with, e.g. pivotally connected to, the first roller 61 for abutting and contacting on the end cam profile 41, so that when the cam disc 4 rotates and the end cam profile 41 is driven to rotate synchronously, the first roller 61 performs synchronous height adjustment along with the height change of the end cam profile 41 to perform power input on the double-pulling lever 62, so that the double-pulling lever 62 swings and the power output end of the double-pulling lever 62 can simultaneously abut and pull the pulling mechanism 7 to make the pulling mechanism rotate And 7, synchronous vertical position adjustment is carried out.

Specifically, the support bracket 63 may be provided on the lower support plate 2, for example, fixed to the lower support plate 2 by bolts. The intermediate position of the double pull lever 62, i.e. the position between the power output end and the power input end, may be mounted on the support bracket 63, and the double pull lever 62 may be rotatable with respect to the support bracket 63, e.g. pivotally connected to the support bracket 63 via a second support shaft (not shown); one end (the lower end shown in fig. 2) of the double pulling lever 62 is used as a power input end and is connected with a first roller 61, the first roller 61 is in contact with the corresponding end cam profile 41 to drive the double pulling lever 62 to rotate along with the rotation of the cam disc 4, and then the other end of the double pulling lever 62 simultaneously moves upwards or downwards according to the lever principle; the purpose of the first roller 61 is to further facilitate shock absorption and friction reduction. The first roller 61 and the power input end of the double-pull-up lever 62 may be connected through a bearing and a snap spring, that is, a bearing is disposed between the first roller 61 and the power input end of the double-pull-up lever 62, and a snap spring is disposed outside the bearing. The other end (the upper right end as shown in fig. 2) of the double pulling lever 62 may be provided with two power output ends as two first power output ends of the first transmission mechanism 6, which are respectively connected with the corresponding pulling mechanisms 7, so that when the double pulling lever 62 rotates, the pulling mechanisms 7 can be driven to perform position adjustment along the vertical direction, i.e. to move upwards or downwards.

In the present embodiment, the single pulling lever 52 and the double pulling lever 62 are both disposed along the radial direction of the cam plate 4, and the single pulling lever 52 and the double pulling lever 62 are disposed at an angle therebetween. Specifically, the included angle between the single pulling lever 52 and the double pulling lever 62 may be combined with the relative staggered position between the end cam profiles 41 corresponding to the second roller 51 and the first roller 61, and both may be determined based on the switching timing of the vacuum tube 8; the double pulling lever 62 can be arranged between the two single pulling levers 52, the angle between the double pulling lever 62 and the single pulling lever 52 can be determined according to the staggered driving time sequence of the second vacuum tube 802 and the third vacuum tube 803, so that the staggered position transformation of the double pulling lever 62 and the two single pulling levers 52 can be realized, and the staggered driving of the vacuum tubes 8 according to the preset staggered time sequence is realized; the preset interleaving timing sequence may be determined according to actual conditions, and is not limited in this embodiment.

With continued reference to fig. 4, the pulling mechanism 7 includes: a lifting rod 71 and a guide sleeve 72; wherein, the guide sleeve 72 is positioned between the upper support plate 1 and the lower support plate 2 and is arranged on the lower support plate 2; the lifting rod 71 is connected with the guide sleeve 72 in a manner of being capable of sliding along the axial direction (vertical direction shown in fig. 4) of the guide sleeve 72, so as to guide the vertical sliding of the lifting rod 71 through the guide sleeve 72, thereby ensuring the axial accuracy of the lifting rod 71 for lifting the vacuum tube 8 up and down, avoiding axial deviation easily caused in the vacuum tube lifting process, namely ensuring that the vacuum tube 8 is always parallel to the axis of the cam disc 3 in the lifting process. Specifically, the guide sleeve 72 and the lifting rod 71 are both disposed along the axial direction of the camshaft 3, and may be disposed coaxially with the vacuum pipe 8. The bottom end of the guide sleeve 72 can be fixed on the support base 53 or the lower support plate 2 by bolts, or can be fixed on the support frame 63. In the present embodiment, the lifting rod 71 is also slidably inserted through the lower support plate 2, so that the return mechanism 9 can be disposed between the lower end of the lifting rod 71 and the lower support plate 2.

For example, as shown in fig. 3, the bottom ends of the guide sleeve 72 of the first pulling mechanism 701 and the guide sleeve 72 of the fourth pulling mechanism 704 are respectively and fixedly mounted on the support base 53 of the first transmission mechanism 501 and the support base 53 of the second transmission mechanism b 502; the bottom ends of the guide sleeve 72 of the second lifting mechanism 702 and the guide sleeve 72 of the third lifting mechanism 703 are both fixedly mounted on the lower support plate 2; the lifting rods 71 of the first lifting mechanism 701, the second lifting mechanism 702, the third lifting mechanism 703 and the fourth lifting mechanism 704 are vertically slidably inserted into the lower support plate 2, and are also vertically slidably inserted into the guide sleeves 72 of the first lifting mechanism 701, the second lifting mechanism 702, the third lifting mechanism 703 and the fourth lifting mechanism 704.

With continued reference to fig. 4, waist-shaped through holes 73 are formed in the guide sleeve 72 and the lifting rod 71 along the axial direction (vertical direction shown in fig. 4), and the first power output end or the second power output end is movably inserted into the waist-shaped through holes 73; the first power output end or the second power output end is further provided with a mounting hole (not shown in the figure) which is in a waist-shaped structure and is arranged along the length direction, the lifting rod 71 is provided with a connecting shaft (not shown in the figure), and the connecting shaft is connected with the first power output end or the second power output end in a sliding mode along the length direction of the mounting hole and is used for driving the lifting rod 71 to slide along the axial direction of the guide sleeve 72 when the first power output end or the second power output end performs circular motion. Specifically, waist-shaped through holes 73 which are oppositely arranged are formed in the guide sleeve 72 and the lifting rod 71, and the power output side of the single lifting lever 52 or the double lifting lever 62, namely the power output rod, is movably arranged in the waist-shaped through holes 73 in a penetrating manner, so that the single lifting lever 52 or the double lifting lever 62 can perform circular motion, namely rotate; because the power output end performs circular motion around the fulcrum, namely the middle position, when the single lifting lever 52 or the double lifting lever 62 rotates, displacement exists in the horizontal direction and the vertical direction; in order to ensure that the lifting rod 71 only moves vertically, the waist-shaped mounting hole is formed in the length direction of the single lifting lever 52 or the double lifting lever 62, the lifting rod is provided with a connecting shaft penetrating through the waist-shaped mounting hole, the connecting shaft can slide along the length direction of the waist-shaped mounting hole, the connecting shaft slides along the direction of the power output rod of the single lifting lever 52 or the double lifting lever 62, and when the single lifting lever 52 or the double lifting lever 62 rotates, the distance between the lifting rod 71 and the fulcrum of the single lifting lever 52 or the double lifting lever 62 is unchanged, so that the lifting rod 71 only moves vertically.

The specific working process of the device is as follows: in the initial state in fig. 2, the first vacuum tube 801 is initially open, the fourth vacuum tube 804 is initially closed, the second vacuum tube 802 and the third vacuum tube 803 are initially open; when the rotating shaft 3 drives the cam plate 4 to rotate forward (counterclockwise rotation as shown in fig. 2), the first roller 61 moves to the low position under the action of the first end cam profile 4101 in the cam plate 4, so that the dual lifting lever 62 in the first transmission mechanism 6 rotates, and then the two first power output ends of the first transmission mechanism 6 respectively drive the second lifting mechanism 702 and the third lifting mechanism 703 to move upward, and simultaneously the second resetting mechanism 902 and the third resetting mechanism 903 respectively apply resetting force to respectively reset the second lifting mechanism 702 and the third lifting mechanism 703 to move upward, so that the second vacuum tube 802 and the third vacuum tube 803 are closed; then, the second roller 51 in the second transmission mechanism b 502 moves to a high position under the action of the third end face cam molded line 4103 in the cam disc 4, so that the single pulling lever 52 in the second transmission mechanism b 502 rotates, the second power output end of the second transmission mechanism b 502 drives the fourth pulling mechanism 704 to move downwards, and meanwhile, the fourth resetting mechanism 904 stores energy, so that the fourth vacuum tube 804 is disconnected; then, the second roller 51 in the second transmission mechanism a 501 moves to a low position under the action of the second end face cam molded line 4102 in the cam disc 4, so that the single pulling lever 52 in the second transmission mechanism a 501 rotates, and the second power output end of the second transmission mechanism a 501 drives the first pulling mechanism 701 to move upwards, and meanwhile, the first resetting mechanism 901 applies a resetting force to pull back the first pulling mechanism 701, so that the first vacuum tube 801 is closed; finally, the first transmission mechanism 6 moves under the action of the cam disc 4, the first roller 61 moves to a high position under the action of the first end face cam molded line 4101 in the cam disc 4, the double-pulling lever 62 rotates to enable two first power output ends of the first transmission mechanism 6 to respectively drive the second pulling mechanism 702 and the third pulling mechanism 703 to move downwards, meanwhile, the second resetting mechanism 902 and the third resetting mechanism 903 are enabled to store energy, the second vacuum tube 802 and the third vacuum tube 803 are disconnected, and the subsequent steps are repeated step by step to complete the switching cycle between the disconnection and the connection of each vacuum tube 8.

In conclusion, the vacuum tube driving device provided by the embodiment utilizes the connection between the second transmission mechanism and the end face cam molded line to realize the vertical position adjustment of the lifting mechanism, and further drives the vacuum tubes to switch, especially, the second transmission mechanism can simultaneously control the on-off of a plurality of vacuum tubes, so that the space utilization rate is improved, and the problem that the existing vacuum tube driving device needs a large space when the number of the vacuum tubes is large due to the fact that the single lever is adopted to control the on-off of the single vacuum tube is solved. Simultaneously, the device also has the following advantages:

firstly, the staggered driving of a plurality of levers by a single cam disc can be realized by utilizing the bumps and the grooves which are arranged at different radial positions on the single cam disc at intervals, so that the lifting accuracy is improved;

secondly, the driving device is small in impact, high in reliability and long in service life.

On-load tap-changer embodiment:

the present embodiment also proposes an on-load tap changer, on which the vacuum tube drive as described above is arranged. In this embodiment, the on-load tap changer may comprise: the on-load tap changer body and the vacuum tube driving device are arranged on the vacuum tube; wherein, the on-load tap-changer body is provided with a high potential line and a low potential line; the static contact of a vacuum tube 8 of the vacuum tube driving device is connected with a high potential line, and the dynamic contact of the vacuum tube 8 is connected with a low potential line, so that the high potential line and the low potential line can be switched on and off under the action of the vacuum tube driving device; and/or a static contact of a vacuum tube 8 of the vacuum tube driving device is connected with the low potential line, and a moving contact of the vacuum tube 8 is connected with the high potential line, and is used for realizing the conduction and the disconnection between the high potential line and the low potential line under the action of the vacuum tube driving device. Specifically, the high potential lines and the low potential lines may be arranged in a one-to-one correspondence and are both provided with a plurality of lines, each correspondingly arranged high potential line and low potential line respectively corresponds to one vacuum tube 8, and a moving contact and a stationary contact of each vacuum tube 8 are respectively connected with the correspondingly arranged high potential line and low potential line, wherein when the moving contact is connected with the high potential line, the stationary contact is connected with the low potential line, or connected with the low potential line through the moving contact and connected with the high potential line through the stationary contact.

In this embodiment, the vacuum tube 8 is switched between on and off to realize the connection and disconnection between the high potential line and the low potential line, that is, when the moving contact and the contact of the vacuum tube 8 are in contact, the high potential line and the low potential line are connected to each other, so that the two lines are at the same potential to realize the connection of current; when the moving contact and the contact of the vacuum tube 8 are separated, the high potential line and the low potential line are cut off.

The specific implementation process of the vacuum tube driving device can be referred to the above description, and the detailed description of the embodiment is omitted here.

Due to the fact that the vacuum tube driving device has the effect, the on-load tap-changer body with the vacuum tube driving device also has the corresponding technical effect.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (12)

1. A vacuum tube drive apparatus, comprising: the device comprises an upper supporting plate, a lower supporting plate, a cam disc, a first transmission mechanism, a lifting mechanism and a vacuum tube; wherein, the first and the second end of the pipe are connected with each other,

the lifting mechanism is arranged between the upper supporting plate and the lower supporting plate in a position-adjustable mode along the axial direction of the upper supporting plate, one end of the vacuum tube is connected with the upper supporting plate, and the other end of the vacuum tube is connected with the lifting mechanism;

the cam disc is rotatably arranged on the lower supporting plate, and an end face cam profile arranged along the circumferential direction of the cam disc is arranged on the cam disc;

the power input end of the first transmission mechanism is matched with the profile of the end face cam, the first transmission mechanism is provided with a plurality of first power output ends, each first power output end is respectively connected with a corresponding lifting mechanism, when the cam disc rotates, the cam disc drives the profile of the end face cam to synchronously rotate, and further the profile of the end face cam carries out power input on the power input end of the first transmission mechanism, so that the plurality of lifting mechanisms are driven to synchronously carry out position adjustment, and the vacuum tubes are synchronously switched on and off at the same time.

2. A vacuum tube drive apparatus as claimed in claim 1, wherein the face cam profile comprises: at least two lugs arranged at intervals along the circumferential direction of the cam plate; wherein, the first and the second end of the pipe are connected with each other,

a groove is formed between any two adjacent lugs.

3. A vacuum tube driving device as claimed in claim 2,

the end wall of the projection is in a cam slope structure, and the slope of the cam slope structure is determined based on the pulling speed of the vacuum tube.

4. A vacuum tube driving apparatus as claimed in any one of claims 1 to 3, wherein the first transmission mechanism comprises: the first roller, the double lifting lever and the support frame; wherein the content of the first and second substances,

the support frame is arranged on the lower support plate;

the double lifting levers are provided with power input ends, the double lifting levers are also provided with two power output ends positioned on the same side, and the power output ends of the double lifting levers and the power input ends of the double lifting levers are positioned on two opposite sides; the double lifting levers are rotatably arranged on the support frame at the middle position between the power output ends and the power input ends of the double lifting levers, the power input ends of the double lifting levers are rotatably connected with the first idler wheels and are used for being in abutting contact with the end face cam molded lines in a pressing mode, when the cam discs rotate and drive the end face cam molded lines to rotate synchronously, the first idler wheels perform synchronous height adjustment along with the height change of the end face cam molded lines, so that the double lifting levers are subjected to power input, the double lifting levers swing, and the power output ends of the double lifting levers can simultaneously press the lifting mechanisms to enable the lifting mechanisms to perform synchronous vertical position adjustment.

5. A vacuum tube driving device according to any one of claims 1 to 3, further comprising: a second transmission mechanism; wherein the content of the first and second substances,

the end cam molded lines are multiple and are sequentially arranged from the axis to the periphery of the cam disc along the radial direction of the cam disc, and part of the end cam molded lines are matched with the power input end of the first transmission mechanism;

the other part of the end face cam molded line is matched with a power input end of the second transmission mechanism, the second transmission mechanism is provided with a second power output end, the second power input end is connected with the corresponding lifting mechanism, when the cam disc rotates, the cam disc drives the end face cam molded line to synchronously rotate, and then the end face cam molded line carries out power input on the power input end of the second transmission mechanism matched with the end face cam molded line, so that the lifting mechanism is driven to carry out position adjustment, and the vacuum tube is switched between on and off.

6. A vacuum tube drive arrangement as claimed in claim 5, wherein the second transmission mechanism comprises: the second roller, the single lifting lever and the supporting seat; wherein the content of the first and second substances,

the supporting seat is arranged on the lower supporting plate;

the single lifting lever is arranged on the supporting seat in a rotatable mode at the middle position between the power output end and the power input end of the single lifting lever, the power input end of the single lifting lever is rotatably connected with the second roller, the second roller is used for being in abutting contact with the end face cam profile, when the cam disc rotates and drives the end face cam profile to rotate synchronously, the second roller is subjected to synchronous height adjustment along with the height change of the end face cam profile so as to perform power input on the single lifting lever, the single lifting lever swings, and the power output end of the single lifting lever can be used for abutting against the lifting mechanism to enable the lifting mechanism to perform vertical position adjustment.

7. The vacuum tube drive of claim 5, wherein the pulling mechanism comprises: a guide sleeve and a lifting rod; wherein the content of the first and second substances,

the guide sleeve is positioned between the upper support plate and the lower support plate and is arranged on the lower support plate;

the lifting rod penetrates through the guide sleeve in a sliding mode along the axial direction of the guide sleeve.

8. A vacuum tube driving device as claimed in claim 7,

waist-shaped through holes are formed in the guide sleeve and the lifting rod in the axial direction, and the first power output end or the second power output end penetrates through the waist-shaped through holes in a movable mode;

the first power output end or the second power output end is further provided with a waist-shaped mounting hole, the lifting rod is provided with a connecting shaft, the connecting shaft is connected to the first power output end or the second power output end in a sliding mode along the length direction of the waist-shaped mounting hole, and the first power output end or the second power output end drives the lifting rod to slide along the axial direction of the guide sleeve when performing circular motion.

9. A vacuum tube driving device as claimed in claim 5,

when the cam disc rotates, the first transmission mechanism and the second transmission mechanism perform staggered movement under the action of the profile of the end face cam so as to drive the lifting mechanisms to perform staggered position adjustment, and further realize staggered driving of the vacuum tubes.

10. A vacuum tube driving device as claimed in any one of claims 1 to 3,

each lifting mechanism is further connected with a reset mechanism and used for applying reset force to the lifting mechanism so that the lifting mechanism moves towards the direction close to the upper supporting plate, and the vacuum tube is closed.

11. A vacuum tube driving device as claimed in any one of claims 1 to 3,

the cam disc is provided with a rotating shaft which is used for being connected with a driving motor so that the driving motor drives the cam disc to rotate.

12. An on-load tap changer provided with a vacuum tube drive as claimed in any one of claims 1 to 11.

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