Electric operating mechanism for no-load tap changer

Abstract

The utility model discloses a distribution no -excitation tap changer electric operating mechanism relates to electric operating mechanism technical field, and no -excitation tap changer has the switch handle for gear adjustment, include: assembly board, and the assembly board one side is equipped with the clamping portion for clamping in the fixed part of no -excitation tap changer, rotation drive mechanism and the handle clamping portion for clamping switch handle, and handle clamping portion is opposite arrangement with clamping portion along the vertical assembly board board surface direction, and the switch handle mounting chuck area is defined between both, and the rotation output end transmission connection of rotation drive mechanism can drive handle clamping portion rotation, and then adjust the gear of switch handle, and the fixed end of rotation drive mechanism is installed on the assembly board and can adjust the position along the vertical assembly board board surface direction to adapt the distance between handle clamping portion and clamping portion. The utility model can accurately adapt to have the no -excitation tap changer of different gear parameters, do not destroy the original switch structure, and can be operated remotely outside the safe distance.

Description

Technical Field

[0001] This utility model relates to the field of feeding device technology, and in particular to the electric operating mechanism of a power distribution non-excitation tap changer. Background Technology

[0002] Currently, the de-energized tap changers used in distribution transformers need to be manually adjusted on-site by staff after a complete power outage. This adjustment requires working at heights, which results in low efficiency, high operational intensity, and high safety risks.

[0003] There are many types of non-energized switches on the market, with different numbers of positions (such as 3 or 5 positions) and different rotation angles required to adjust each position.

[0004] This difference leads to the following drawbacks: Highly specialized, with poor compatibility: Existing electric operating devices are usually customized for specific switch models, with fixed rotation angles and position settings. Once the switch model is changed, the entire electric mechanism may become unusable, requiring redesign and reinstallation, resulting in extremely low versatility.

[0005] Insufficient intelligence: Existing technical solutions lack an intelligent mechanism capable of automatically recognizing and adapting to different switch parameters. This fails to address the need for "one device to adapt to multiple switches," significantly limiting its application scope and increasing user purchase and maintenance costs.

[0006] In addition, existing electric operating mechanisms require the destruction of the original switch structure for installation; there is an urgent need in this field for an electric operating solution that can adaptively learn the gear parameters of different non-excitation switches without destroying the original switch structure, and has high compatibility and high intelligence.

[0007] Therefore, how to provide an electric operating mechanism for power distribution tap changers that has the function of learning and recording gear positions, accurately adapts to tap changers with different gear parameters, does not damage the original switch structure, and can be operated remotely from a safe distance is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0008] In view of this, the present invention proposes an electric operating mechanism for a power distribution tap changer without excitation, aiming to solve one of the above-mentioned technical problems.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides an electric operating mechanism for a power distribution off-magnetic tap changer. The off-magnetic tap changer has a switch handle for adjusting the tap position, including: The assembly plate has a clamping part on one side for clamping onto the fixing part of the de-energized tap changer. The system includes a rotary drive mechanism and a handle clamping part for holding the switch handle. The handle clamping part and the clamping part are arranged opposite each other in a direction perpendicular to the surface of the mounting plate, defining a switch handle clamping area between them. The rotary output end of the rotary drive mechanism is driven to drive the handle clamping part to rotate, thereby adjusting the position of the switch handle. The fixed end of the rotary drive mechanism is mounted on the mounting plate and can be adjusted in a direction perpendicular to the surface of the mounting plate to adapt to the distance between the handle clamping part and the clamping part.

[0010] During installation, the electric operating mechanism of this power distribution non-excitation tap changer is fixed to the fixed part of the non-excitation tap changer by clamping and securing it, thus fixing the position of the mounting plate relative to the non-excitation tap changer. The handle clamping part is installed on the rotary output end of the rotary drive mechanism. By adjusting the mounting height of the rotary drive mechanism on the mounting plate, the distance between the handle clamping part and the clamping part can be adjusted to adapt to connection and assembly with non-excitation tap changers of different sizes. In use, the rotary drive mechanism drives the handle clamping part to rotate, thereby adjusting the turning angle of the switch handle to precisely match the switch handle's position. The installation of this power distribution non-excitation tap changer electric operating mechanism does not damage the original switch structure and can accurately adapt to non-excitation tap changers with different position parameters and sizes.

[0011] As a further improvement to the above technical solution, a position sensor is also included, which is drivenly connected to the rotation output end of the rotation drive mechanism to detect its rotation angle.

[0012] The beneficial effects of the above technical solution are: the position sensor can obtain the rotation angle of the switch handle according to the transmission relationship by detecting the rotation angle of the rotation output end of the rotary drive mechanism, thereby improving the gear control accuracy.

[0013] As a further improvement to the above technical solution, a control unit is also included, which is mounted on the rotary drive mechanism; the control unit is electrically connected to the position sensor and the rotary drive mechanism, and is able to receive the rotation position signal of the switch handle fed back by the position sensor, and is able to control the rotation angle of the rotation output end of the rotary drive mechanism.

[0014] The beneficial effect of the above technical solution is that the control unit controls the rotation angle of the rotation output end of the rotation drive mechanism based on the rotation position information of the switch handle fed back by the position sensor, which can realize closed-loop control.

[0015] As a further improvement to the above technical solution, it also includes a handheld operating controller and a communication module; the communication module is installed on the rotary drive mechanism and electrically connected to the control unit, and the handheld operating controller can communicate with the control unit through the communication module.

[0016] The beneficial effects of the above technical solution are: the handheld operating controller communicates with the control unit through the communication module to transmit data and instructions, enabling remote control and ensuring operational safety.

[0017] As a further improvement to the above technical solution, the control unit is equipped with a data storage module.

[0018] The beneficial effects of the above technical solution are: the data storage module is used to permanently store the learned gear angle mapping table and gear shifting operation records.

[0019] As a further improvement to the above technical solution, the handle clamping part includes a jaw disc, a fastening screw, and a jaw assembly; the jaw disc and the clamping part are arranged opposite to each other along a direction perpendicular to the surface of the mounting plate, defining a switch handle clamping area between them; the top of the jaw disc is a connecting end for transmission connection with the rotary output end of the rotary drive mechanism; a screw through hole is provided in the middle of the top surface of the jaw disc; one end of the fastening screw can pass through the screw through hole and be fastened to the middle of the top of the switch handle, so as to fasten the jaw disc to the upper end of the switch handle; The bottom end of the gripper disc is provided with a gripper groove on the side corresponding to the screw through hole; the gripper assembly is slidably connected in the gripper groove and is able to grip the handle of the switch handle.

[0020] The beneficial effects of the above technical solution are as follows: During installation, remove the fixing screws of the switch shaft connected to the non-excitation tap changer at the top of the switch handle to expose the threaded hole of the switch shaft. Align the screw through hole of the gripper disc with the threaded hole of the switch shaft, and fasten the gripper disc to the switch shaft of the non-excitation tap changer by tightening the screws and press the switch handle tightly. Adjust the position of the gripper assembly by sliding it in the gripper groove to align with the handle that holds the switch handle.

[0021] As a further improvement to the above technical solution, the rotary drive mechanism includes a mounting bracket, a drive motor, and a reduction mechanism; Both the drive motor and the reduction mechanism are mounted on the mounting bracket; the drive motor's shaft is driven to the rotary input end of the reduction mechanism; the reduction mechanism's rotary output end is driven to the gripper disc to drive its rotation. A support plate is fixed on the assembly plate along a direction perpendicular to its surface. A strip-shaped fixing hole is formed on the surface of the support plate along a direction perpendicular to the surface of the assembly plate. The mounting bracket is connected to the strip-shaped fixing hole through a connector and can move along the length of the strip-shaped fixing hole to adjust the distance between the gripper disc and the clamping part.

[0022] The beneficial effects of the above technical solution are: by adjusting the installation height of the mounting bracket on the strip fixing hole, the position of the mounting bracket can be adjusted; the rotating shaft of the drive motor drives the rotating input end of the reduction mechanism to rotate, the reduction mechanism reduces speed, thereby improving control accuracy; the rotating output end of the reduction mechanism drives the gripper disc to rotate, thereby adjusting the rotation angle of the switch handle.

[0023] As a further improvement to the above technical solution, the reduction mechanism is a worm gear reduction mechanism; the worm of the reduction mechanism is coaxially connected to the shaft of the drive motor; the worm of the reduction mechanism is connected to the gripper disc.

[0024] The beneficial effects of the above technical solution are: the reduction mechanism adopts a worm gear reduction mechanism, which utilizes the self-locking function of the worm gear mechanism to achieve reverse self-locking, preventing the switch handle from rotating and shifting on its own, thus improving safety performance.

[0025] As a further improvement to the above technical solution, the gripper assembly includes a first gripper, a second gripper, and a second fastening screw; one end of both the first gripper and the second gripper are slidably connected in the gripper groove; the first gripper and the second gripper are arranged opposite to each other along the length of the gripper groove; the area between the first gripper and the second gripper is a clamping area for accommodating the handle of the switch handle; the second fastening screw can fasten the first gripper and the second gripper to clamp the handle of the switch handle located in the clamping area of ​​the handle.

[0026] The beneficial effects of the above technical solution are: during installation, the positions of the first and second handle clamps in the clamp groove can be adjusted by sliding to adapt to switch handles of different thicknesses; the second fastening screw is used to fasten the first and second handle clamps to the handle of the switch handle.

[0027] As a further improvement to the above technical solution, the clamping part includes a clamping arm one and a clamping arm two; one end of each of the clamping arms one and two is hinged to one end of the assembly plate in the length direction and is arranged at intervals along the width direction of the assembly plate; the length directions of the clamping arms one and two are both arranged parallel to the surface of the assembly plate; a clamping area for clamping the mounting and fixing nut of the de-energized tap changer is defined between the clamping arms one and two; the other end of the clamping arms one and two can be locked by fasteners.

[0028] The beneficial effects of the above technical solution are as follows: the mounting and fixing nut is used to fix the non-excitation tap changer on the transformer shell. During installation, the mounting plate is positioned by locking the clamping arms one and two around the mounting and fixing nut.

[0029] As can be seen from the above technical solution, compared with the prior art, the present utility model discloses an electric operating mechanism for a power distribution non-excitation tap changer, which has the following advantages and beneficial effects: This invention improves the safety of operating a non-energized tap changer, preventing personnel from climbing or contacting live equipment; it enhances operational efficiency through remote control, reducing time from hours to minutes; it features intelligent learning and recording functions, making it highly adaptable; it supports both wired and wireless modes for flexible operation; it does not damage the original switch handle structure, retains manual operation functionality, and is compatible with the original switch structure. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This utility model presents a schematic diagram of the overall structure of the electric operating mechanism of the power distribution non-excitation tap changer.

[0032] Figure 2 A schematic diagram of the rotary drive mechanism of the electric operating mechanism of the power distribution non-excitation tap changer of this utility model.

[0033] Figure 3 A schematic diagram of the handle clamping part structure of the electric operating mechanism of the power distribution non-excitation tap changer of this utility model (the lower end of the positioning handle is engaged in the positioning slot).

[0034] Figure 4 A schematic diagram of the handle clamping part structure of the electric operating mechanism of the power distribution non-excitation tap changer of this utility model (the three fastening screws support the positioning handle in an inclined state so that it is disengaged from the positioning slot).

[0035] Figure 5 This utility model provides a schematic diagram of the structure of a non-excitation tap changer applicable to the electric operating mechanism of a non-excitation tap changer for power distribution.

[0036] Figure 6 A schematic diagram of the gripper disc structure of the electric operating mechanism of the power distribution non-excitation tap changer of this utility model.

[0037] Figure 7 This utility model presents a schematic diagram of the handheld operating controller of the electric operating mechanism for a power distribution non-excitation tap changer.

[0038] Figure 8 System architecture diagram of the electric operating mechanism of the power distribution non-excitation tap changer (wired and wireless versions).

[0039] In the diagram: 1. Assembly plate; 11. Clamping part; 111. Clamping arm one; 112. Clamping arm two; 113. Fastener; 12. Support plate; 121. Strip-shaped fixing hole; 2. Rotary drive mechanism; 21. Mounting bracket; 211. Mounting through hole; 22. Drive motor; 23. Reduction mechanism; 231. Worm gear; 232. Turbine; 2321. Turbine shaft; 233. Connecting plate; 24. Fixing bolt; 3. Handle clamping part; 31. Clamping jaw plate; 311. Screw through hole; 312. Clamping jaw groove; 32. Fastening screw one; 33. Clamping jaw assembly; 331. Handle clamping jaw one 332. Handle gripper two; 333. Fastening screw two; 334. Fastening screw three; 4. Position sensor; 5. Control unit; 6. Handheld operating controller; 61. Display screen; 62. Upshift / downshift adjustment key; 63. Speaker; 64. Confirm key; 65. Return key; 66. Aviation plug; 67. External power supply; 68. Charging connector; 7. Communication module; 8. No-excitation tap changer; 81. Switch handle; 82. Mounting nut; 83. Sealing cover and sealing ring; 84. Gear contact; 85. Threaded connection hole; 86. Positioning slot; 87. Positioning handle. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] According to the embodiments of this utility model, such as Figures 1 to 8 As shown, the electric operating mechanism of the power distribution de-energized tap changer 8 has a switch handle 81 for gear adjustment, including: a mounting plate 1, a rotary drive mechanism 2, and a handle clamping part 3 for clamping the switch handle 81.

[0045] One side of the mounting plate 1 is provided with a clamping part 11 for securing it to the fixed part of the de-energized tap changer. The handle clamping part 3 and the clamping part 11 are arranged opposite each other in the direction perpendicular to the surface of the mounting plate 1, defining a clamping area for the switch handle between them; the rotary drive mechanism 2 is driven by the rotary output end and can drive the handle clamping part 3 to rotate, thereby adjusting the position of the switch handle 81; the fixed end of the rotary drive mechanism 2 is mounted on the mounting plate 1 and can be adjusted in the direction perpendicular to the surface of the mounting plate 1 to adapt to the distance between the handle clamping part 3 and the clamping part 11.

[0046] During installation, the electric operating mechanism of the power distribution non-excitation tap changer in this embodiment is clamped and fixed to the fixed part of the non-excitation tap changer by the clamping part 11, so that the position of the mounting plate 1 relative to the non-excitation tap changer is fixed. The handle clamping part 3 is installed on the rotation output end of the rotary drive mechanism 2. By adjusting the installation height of the rotary drive mechanism 2 on the mounting plate 1, the distance between the handle clamping part 3 and the clamping part 11 can be adjusted to adapt to the connection and assembly of non-excitation tap changers 8 of different sizes. In use, the rotation angle of the handle clamping part 3 can be adjusted by driving the rotary drive mechanism 2 to drive the rotary drive mechanism 2 to precisely adapt to the position of the switch handle 81. The installation of the electric operating mechanism of the power distribution non-excitation tap changer of this utility model will not damage the original switch structure and can accurately adapt to non-excitation tap changers with different position parameters and sizes.

[0047] Specifically, the fixing part of the non-excitation tap changer can be a fixing nut used to fix the non-excitation tap changer on the transformer housing or the outer shell part of the non-excitation tap changer itself located outside the transformer housing.

[0048] In some embodiments, a position sensor 4 is also included, which is drively connected to the rotation output end of the rotary drive mechanism 2 to detect its rotation angle.

[0049] The position sensor 4 detects the rotation angle of the rotation output end of the rotary drive mechanism 2, and thus obtains the rotation angle of the switch handle 81 according to the transmission relationship, thereby improving the gear control accuracy.

[0050] Specifically, position sensor 4 can be an angle sensor.

[0051] In some embodiments, a control unit 5 is also included. The control unit 5 is mounted on the rotary drive mechanism 2. The control unit 5 is electrically connected to the position sensor 4 and the rotary drive mechanism 2, and is able to receive the rotation position signal of the switch handle fed back by the position sensor 4, and is able to control the rotation angle of the rotation output end of the rotary drive mechanism 2.

[0052] The control unit 5 controls the rotation angle of the rotation output end of the rotation drive mechanism 2 based on the rotation position information of the switch handle 81 fed back by the position sensor 4, thereby achieving closed-loop control.

[0053] Specifically, control unit 5 can be powered by an independent rechargeable battery. The rechargeable battery can be connected to the power output of a transformer to ensure sufficient power.

[0054] In some embodiments, the device further includes a handheld operating controller 6 and a communication module 7; the communication module 7 is mounted on the rotary drive mechanism 2 and electrically connected to the control unit 5, and the handheld operating controller 6 can communicate with the control unit 5 through the communication module 7.

[0055] The handheld controller 6 communicates with the control unit 5 through the communication module 7 to transmit data and instructions, enabling remote control and ensuring operational safety.

[0056] Specifically, the handheld controller 6 has a core processor and memory for running the device's operating system and control logic, and temporarily storing interface data and instructions. The handheld controller 6 has a human-machine interface module, including an LCD screen for displaying menus, current gear position, gear shift records, and other graphical interfaces; physical buttons for receiving user input commands; and a speaker for providing voice announcements (such as current gear position) and alarm prompts. The handheld controller 6 has a communication module, including a wireless module for establishing a secure and encrypted connection with the electric mechanism body, transmitting control commands, and receiving status data; and a wired communication interface for serving as a backup or primary communication channel for transmitting commands and data. The handheld controller 6 has a power management module, including a built-in lithium battery for powering the handheld device; a charging interface and an external power interface for supporting charging and external power supply. The handheld controller 6 is equipped with an automatic power-off circuit to automatically cut off power after a period of inactivity.

[0057] In some embodiments, the control unit 5 is equipped with a data storage module.

[0058] The data storage module is used to permanently store the learned gear angle mapping table and gear shifting operation records. Control unit 5 is the core control brain, used to receive instructions, process logic, drive motors, and manage data.

[0059] In some embodiments, the handle clamping part 3 includes a gripper disk 31, a fastening screw 32, and a gripper assembly 33; the gripper disk 31 and the clamping part 11 are arranged opposite to each other along the direction perpendicular to the surface of the mounting plate 1, and a switch handle clamping area is defined between them; the top end of the gripper disk 31 is a connection end for transmission connection with the rotary output end of the rotary drive mechanism 2; a screw through hole 311 is provided in the middle of the top surface of the gripper disk 31; one end of the fastening screw 32 can pass through the screw through hole 311 and be fastened to the middle of the top end of the switch handle 81, so as to fasten the gripper disk 31 to the upper end of the switch handle 81; The bottom end of the gripper disc 31 has a gripper groove 312 on one side corresponding to the screw through hole 311; the gripper assembly 33 is slidably connected in the gripper groove 312 and can grip the handle of the switch handle 81.

[0060] During installation, remove the fixing screws connecting the top of the switch handle 81 to the switch shaft of the non-excitation tap changer 8 to expose the threaded connection hole 85 of the switch shaft. Align the screw through hole 311 of the gripper disc 31 with the threaded connection hole 85 of the switch shaft, and fasten the gripper disc 31 to the switch shaft of the non-excitation tap changer 8 with the fastening screw 32 to press the switch handle 81. Slide and adjust the position of the gripper assembly 33 in the gripper slide groove 312 to align and hold the handle of the switch handle 81.

[0061] In some embodiments, the rotary drive mechanism 2 includes a mounting bracket 21, a drive motor 22, and a reduction mechanism 23; Both the drive motor 22 and the reduction mechanism 23 are mounted on the mounting bracket 21; the rotating shaft of the drive motor 22 is driven to the rotating input end of the reduction mechanism 23; the rotating output end of the reduction mechanism 23 is driven to the gripper disk 31 to drive its rotation. A support plate 12 is fixed on the assembly plate 1 along the direction perpendicular to its surface. A strip-shaped fixing hole 121 is opened on the surface of the support plate 12 along the direction perpendicular to the surface of the assembly plate 1. The mounting bracket 21 is connected to the strip-shaped fixing hole 121 through a connector and can move along the length direction of the strip-shaped fixing hole 121 to adjust the distance between the gripper plate 31 and the clamping part 11.

[0062] The position of the mounting bracket 21 can be adjusted by adjusting the mounting height of the mounting bracket 21 on the strip-shaped fixing hole 121; the shaft of the drive motor 22 drives the rotary input end of the reduction mechanism 23 to rotate, the reduction mechanism 23 reduces speed, thereby improving control accuracy; the rotary output end of the reduction mechanism 23 drives the gripper disk 31 to rotate, thereby adjusting the rotation angle of the switch handle 81.

[0063] Specifically, the connector can be a fixing bolt 24, and the mounting bracket 21 has a mounting through hole 211 at the bottom. During assembly, the mounting through hole 211 of the mounting bracket 21 is aligned with the strip fixing hole 121, and the fixing bolt 24 passes through the mounting through hole 211 and the strip fixing hole 121 to fasten the mounting bracket 21 to the assembly plate 1.

[0064] In some embodiments, the reduction mechanism 23 is a worm gear reduction mechanism; the worm 231 of the reduction mechanism 23 is coaxially connected to the shaft of the drive motor 22; the worm 232 of the reduction mechanism 23 is connected to the gripper disk 31.

[0065] The reduction mechanism 23 adopts a worm gear reduction mechanism. By utilizing the self-locking function of the worm gear mechanism, reverse self-locking is achieved to prevent the switch handle 81 from rotating and shifting on its own, thereby improving safety performance.

[0066] Specifically, the worm gear 231 of the reduction mechanism 23 is rotatably connected to the mounting bracket 21, and one end of it is coaxially connected to the shaft of the drive motor 22; the other end of the worm gear 231 is a manual rotating end, used to manually rotate and adjust the position of the switch handle when the drive motor 22 is de-energized; the worm gear 231 is meshed and connected to the turbine 232; the turbine shaft 2321 is fixedly mounted at the center of the turbine 232, and the turbine shaft 2321 is rotatably connected to the mounting bracket 21; the position sensor 4 is mounted on the mounting bracket 21; one end of the turbine shaft 2321 is coaxially connected to the position sensor 4. The sensor 4 is an input shaft at the detection end; the sensor 4 can detect the rotation angle of the turbine shaft 2321; a connecting plate 233 is coaxially fixedly mounted on the other end of the turbine shaft 2321; a screw through hole is opened on the surface of the connecting plate 233, and a threaded hole is opened on the top surface of the gripper plate 31. The connecting plate 233 and the gripper plate 31 are connected by a screw passing through the screw through hole of the connecting plate 233 and fastened in the threaded hole of the gripper plate 31, thereby fixing the connecting plate 233 and the gripper plate 31 coaxially. The turbine shaft 2321, the connecting plate 233 and the gripper plate 31 are coaxially arranged and can rotate synchronously. The worm gear 231 is arranged along the direction parallel to the surface of the mounting plate 1.

[0067] In some embodiments, the gripper assembly 33 includes a first handle gripper 331, a second handle gripper 332, and a second fastening screw 333; one end of both the first handle gripper 331 and the second handle gripper 332 is slidably connected in the gripper groove 312; the first handle gripper 331 and the second handle gripper 332 are arranged opposite to each other along the length direction of the gripper groove 312; the area between the first handle gripper 331 and the second handle gripper 332 is a clamping area for accommodating the handle of the switch handle 81; the second fastening screw 333 can fasten the first handle gripper 331 and the second handle gripper 332 to clamp the handle of the switch handle 81 located in the clamping area of ​​the handle.

[0068] During installation, the positions of handle gripper 1 331 and handle gripper 2 332 in the gripper groove 312 can be adjusted by sliding to adapt to switch handles 81 of different thicknesses; fastening screw 2 333 is used to fasten handle gripper 1 331 and handle gripper 2 332 to the handle of switch handle 81.

[0069] In some embodiments, considering that the existing de-energized tap changer 8 has a positioning handle 87 for locking the switch handle 81; the upper end of the positioning handle 87 is hinged to one end of the switch handle 81; the de-energized tap changer 8 has a position indicator disc below the switch handle 81 to indicate the position of the switch handle 81 when it is turned; the outer periphery of the position indicator disc has an open slot 86; under the action of gravity, the lower end of the positioning handle 87 can be flipped to fit into the open slot 86 to position the switch handle 81 to a certain position and prevent it from rotating or shifting. In order to avoid damaging the original function of the positioning handle 87, but to ensure that the electric operating mechanism of the power distribution non-excitation tap changer of this utility model is not restricted by the positioning handle 87, during installation, both the switch handle 81 and the positioning handle 87 are located between the handle jaw 1 331 and the handle jaw 2 332. The jaw assembly 33 also includes a fastening screw 334. The fastening screw 334 can be fastened to the lower part of the handle jaw 1 331 and the handle jaw 2 332 and supported on the periphery of the positioning handle 87, thereby restricting the lower end of the positioning handle 87 from swinging downward into the opening slot 86. Thus, without damaging the original structure of the non-excitation tap changer 8, the original position positioning function of the existing non-excitation tap changer 8 is eliminated.

[0070] In some embodiments, the clamping part 11 includes a first clamping arm 111 and a second clamping arm 112; one end of the first clamping arm 111 and the second clamping arm 112 are both hinged to one end of the assembly plate 1 in the length direction and are arranged at intervals along the width direction of the assembly plate 1; the length direction of the first clamping arm 111 and the second clamping arm 112 are both arranged in a direction parallel to the surface of the assembly plate 1; a clamping area for clamping the mounting and fixing nut 82 of the non-excitation tap changer 8 is defined between the first clamping arm 111 and the second clamping arm 112; the other end of the first clamping arm 111 and the second clamping arm 112 can be connected and locked by fasteners 113.

[0071] The mounting nut 82 is used to fix the non-excitation tap changer 8 on the transformer housing. During installation, the mounting plate 1 is positioned by locking the clamping arms 111 and 112 around the mounting nut 82.

[0072] Specifically, both clamping arms 111 and 112 have bolt through holes at their other ends; fastener 113 is a fastening bolt, with one end of fastener 113 passing through the bolt through holes of clamping arms 111 and 112 in sequence to fasten them to the mounting and fixing nut 82. The mounting and fixing nut 82 is tightened to the transformer housing according to the standard torque to prevent loosening, and is checked regularly; if necessary, a self-locking nut or anti-loosening washer is used.

[0073] Specifically, clamping arms 111 and 112 are arc-shaped clamping arms with the same diameter; the outer diameter of the mounting and fixing nut 82 is the same as the diameter of clamping arms 111 and 112; when clamping arms 111 and 112 are fitted and clamped around the outer periphery of the mounting and fixing nut 82, the arc center of clamping arms 111 and 112 coincides with the central axis of the mounting and fixing nut 82, thereby ensuring that the central axes of the gripper disc 31 and the connecting disc 233 coincide with the rotation axis of the switch handle 81, improving the accuracy of assembly and operation.

[0074] It should be noted that: the drive motor 22 is a stepper motor, providing a precise power source for rotation. The reduction mechanism 23 uses a worm gear reducer to convert the high speed of the drive motor 22 into high torque output to drive the switch handle. The worm gear reducer has a mechanical self-locking characteristic, ensuring mechanical locking after positioning to prevent the switch handle from shifting.

[0075] The communication module 7 can be a wireless module or a wired interface, used to receive commands from the handheld operating controller 6 and send status data (such as current angle and gear position) to it. The data storage module (non-volatile memory) is used to permanently store the learned gear position and angle mapping table and gear shifting operation records.

[0076] The gripper disc 31, fastening screw 32, gripper 331, and gripper 332 of the handle clamping part 3 are used for mechanical connection between the electric operating mechanism and the non-excitation tap changer. The gripper 331 and gripper 332 can be adapted to the switch handles of various non-excitation tap changers and drive the switch handles of the non-excitation tap changer to rotate. The mounting bracket 21 and the mounting plate 1 are both located on one side of the non-excitation tap changer, providing a stable fixing point for the overall electric operating mechanism without damaging the original structure of the non-excitation tap changer.

[0077] The following example uses an electrically operated mechanism equipped with wireless control: Step 1: The operator turns on the handheld control controller 6 from a safe position, which automatically connects to the control unit 5.

[0078] Step 2: Enter the "Gear Learning" interface, manually adjust the gears to complete the gear calibration and save.

[0079] Step 3: Select upshift or downshift on the "gear adjustment" interface, and after confirmation, the electric operating mechanism drives the switch handle to rotate.

[0080] Step 4: Once in position, the gear position will be announced via voice, and the gear adjustment record will be automatically saved.

[0081] Step 5: If there is no operation for ten minutes, the equipment will automatically shut down to save energy.

[0082] This system is suitable for 3- or 5-position non-excitation tap changers and has a wide range of field applicability.

[0083] The software workflow runs through the aforementioned hardware modules, and the core steps are as follows: Step 1: System connection and initialization.

[0084] Hardware actions: The user turns on the power to the handheld controller 6 and the control unit 5 of the electric operating mechanism. The Bluetooth modules of both parties start up and complete an encrypted pairing handshake, or a wired link is established.

[0085] Software and Data Flow: After the connection is established, the control unit 5 of the electric operating mechanism sends the angle value read by the current position sensor to the handheld operating controller 6 in real time. After receiving the data, the software of the handheld operating controller 6 displays "Connection successful".

[0086] Step 2: Gear learning (core adaptive step).

[0087] Software flow (handheld controller 6): Users can access the "Gear Learning" interface from the menu.

[0088] Users select the target learning level (e.g., "Level 1") by pressing a button.

[0089] The user manually rotates the handle of the de-energized switch until the target mechanical gear (gear 1) is reached. The user then presses the "Confirm" button.

[0090] Hardware and data flow: The handheld mechanism sends the "record gear" command and the target gear value (gear 1) to the electric mechanism control unit via Bluetooth / RS485 interface.

[0091] The control unit immediately reads the value of the current position sensor (i.e., the specific angle value representing "gear 1") and stores this [gear: 1, angle: X] mapping relationship in the data storage module of the main body.

[0092] After the learning process is complete, the handheld controller 6 reads the list of learned gear positions from the control unit and displays it. This process resolves the compatibility issues arising from the wide variety of switch types and the inconsistent turning angles of the switch handles.

[0093] Step 3: Electric gear shifting operation.

[0094] Software flow (handheld controller 6): Users can enter the "gear adjustment" interface and select "upshift" or "downshift".

[0095] The handheld controller software calculates the target gear (e.g., from the current 2nd gear to 3rd gear) based on the user's selection.

[0096] Hardware and data flow: The handheld mechanism issues the command to "shift to gear 3".

[0097] After receiving the instruction, the handheld operating controller 6 control unit immediately retrieves the target angle Y corresponding to gear 3 from the data storage module.

[0098] The control unit drives the stepper motor to rotate and uses the position sensor to provide real-time feedback on the current angle, forming a closed-loop control until the target angle Y is reached.

[0099] Once in position, the control unit cuts off the power to the stepper motor, activates the mechanical self-locking device, and simultaneously sends a "successful operation" signal and the current gear position back to the handheld control controller 6.

[0100] The handheld controller uses six speakers to broadcast voice messages and displays success information on the interface.

[0101] The control unit records the "time, original gear, and new gear" of this gear adjustment and stores them in the data storage module.

[0102] Step 4: Data query and management.

[0103] Software process: The user requests to view the "file retrieval record" on the handheld operating controller 6.

[0104] Hardware and data flow: The handheld mechanism sends a request command, the control unit reads the historical record list from the data storage module, and sends it to the handheld mechanism for display via Bluetooth / RS485 interface.

[0105] This invention solves the problems of low efficiency and poor safety of manual operation of existing non-excitation tap changers. This invention provides a highly adaptable electric operating mechanism with remote control, gear learning, and operation recording, which can realize remote, safe, and intelligent tap changer adjustment.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0107] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric operating mechanism for a power distribution off-magnetic tap changer, wherein the off-magnetic tap changer (8) has a switch handle (81) for adjusting the tap position, characterized in that, include: Assembly plate (1), one side of which is provided with a clamping part (11) for clamping to the fixed part of the non-excitation tap changer. A rotary drive mechanism (2) and a handle clamping part (3) for clamping the switch handle (81) are arranged opposite to each other in a direction perpendicular to the surface of the mounting plate (1), defining a switch handle clamping area between them; the rotary output end of the rotary drive mechanism (2) is connected to drive the handle clamping part (3) to rotate, thereby adjusting the position of the switch handle (81); the fixed end of the rotary drive mechanism (2) is mounted on the mounting plate (1) and can be adjusted in a direction perpendicular to the surface of the mounting plate (1) to adapt to the distance between the handle clamping part (3) and the clamping part (11).

2. The electric operating mechanism for the power distribution de-energized tap changer according to claim 1, characterized in that, It also includes a position sensor (4), which is driven to the rotation output end of the rotary drive mechanism (2) to detect its rotation angle.

3. The electric operating mechanism for the power distribution de-energized tap changer according to claim 2, characterized in that, It also includes a control unit (5), which is mounted on the rotary drive mechanism (2); the control unit (5) is electrically connected to the position sensor (4) and the rotary drive mechanism (2), and can receive the rotation position signal of the switch handle fed back by the position sensor (4), and can control the rotation angle of the rotation output end of the rotary drive mechanism (2).

4. The electric operating mechanism for the power distribution de-energized tap changer according to claim 3, characterized in that, It also includes a handheld operating controller (6) and a communication module (7); the communication module (7) is mounted on the rotary drive mechanism (2) and electrically connected to the control unit (5), and the handheld operating controller (6) can communicate with the control unit (5) through the communication module (7).

5. The electric operating mechanism for the power distribution de-energized tap changer according to claim 4, characterized in that, The control unit (5) is equipped with a data storage module.

6. The electric operating mechanism for a power distribution de-energized tap changer according to claim 1, characterized in that, The handle clamping part (3) includes a gripper disc (31), a fastening screw (32), and a gripper assembly (33); the gripper disc (31) and the clamping part (11) are arranged opposite to each other in a direction perpendicular to the surface of the mounting plate (1), and the two define a switch handle clamping area; the top of the gripper disc (31) is a connection end for transmission connection with the rotation output end of the rotary drive mechanism (2); a screw through hole (311) is provided in the middle of the top surface of the gripper disc (31); one end of the fastening screw (32) can pass through the screw through hole (311) and be fastened to the middle of the top of the switch handle (81) to fasten the gripper disc (31) to the upper end of the switch handle (81); The bottom end of the gripper disc (31) is provided with a gripper groove (312) on the side corresponding to the screw through hole (311); the gripper assembly (33) is slidably connected in the gripper groove (312) and can grip the handle of the switch handle (81).

7. The electric operating mechanism for a power distribution tap changer without excitation according to claim 6, characterized in that, The rotary drive mechanism (2) includes a mounting bracket (21), a drive motor (22), and a reduction mechanism (23); The drive motor (22) and the reduction mechanism (23) are both mounted on the mounting bracket (21); the rotating shaft of the drive motor (22) is driven to the rotation input end of the reduction mechanism (23); the rotation output end of the reduction mechanism (23) is driven to the gripper disk (31) to drive it to rotate; A support plate (12) is fixed on the assembly plate (1) along the direction perpendicular to its surface. A strip-shaped fixing hole (121) is opened on the surface of the support plate (12) along the direction perpendicular to the surface of the assembly plate (1). The mounting bracket (21) is connected to the strip-shaped fixing hole (121) through a connector and can move along the length direction of the strip-shaped fixing hole (121) to adjust the distance between the gripper disc (31) and the clamping part (11).

8. The electric operating mechanism for a power distribution de-energized tap changer according to claim 7, characterized in that, The reduction mechanism (23) is a worm gear reduction mechanism; the worm (231) of the reduction mechanism (23) is coaxially connected to the shaft of the drive motor (22); the worm (232) of the reduction mechanism (23) is connected to the gripper disk (31).

9. The electric operating mechanism for a power distribution de-energized tap changer according to claim 6, characterized in that, The gripper assembly (33) includes a first gripper (331), a second gripper (332), and a second fastening screw (333). One end of the first gripper (331) and the second gripper (332) are slidably connected in the gripper groove (312). The first gripper (331) and the second gripper (332) are arranged opposite to each other along the length of the gripper groove (312). The area between the first gripper (331) and the second gripper (332) is a clamping area for accommodating the handle of the switch handle (81). The second fastening screw (333) can fasten the first gripper (331) and the second gripper (332) to clamp the handle of the switch handle (81) located in the clamping area of ​​the handle.

10. The electric operating mechanism for a power distribution tap changer without excitation according to claim 1, characterized in that, The clamping part (11) includes a clamping arm one (111) and a clamping arm two (112); one end of the clamping arm one (111) and the clamping arm two (112) are both hinged to one end of the assembly plate (1) in the length direction and are arranged at intervals along the width direction of the assembly plate (1); the length direction of the clamping arm one (111) and the clamping arm two (112) are both arranged in a direction parallel to the surface of the assembly plate (1); a clamping area for clamping the mounting and fixing nut (82) for clamping the non-excitation tap changer (8) is defined between the clamping arm one (111) and the clamping arm two (112); the other end of the clamping arm one (111) and the clamping arm two (112) can be connected and locked by fasteners (113).

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