Excitation-free pole-mounted transformer tap switch gear shifting device

Abstract

The invention belongs to the technical field of transformer gear adjustment, and particularly relates to a non-excitation pole-mounted transformer tap switch gear shifting device which comprises a base and an execution assembly arranged above the base, the base and the execution assembly are fixedly connected through a multi-stage telescopic rod and a supporting arm, the execution assembly comprises an outer cover arranged below the supporting arm, and the outer cover is fixedly connected with the base. An insulating cap screwing part, a gear adjusting part, a limiting rod pressing and shifting part and a tap switch self-cleaning part are arranged in the outer cover, the insulating cap screwing part comprises a linear sliding rail arranged at the top of the outer cover, a mounting rod is fixed to a sliding block of the linear sliding rail, two through holes are formed in the mounting rod, and the limiting rod pressing and shifting part and the tap switch self-cleaning part are arranged in the through holes. And movable rods are arranged in the two through holes in a sliding fit manner. The lever drives the fan-shaped plate to swing in a reciprocating mode, so that the rotary shifting head screws the tap switch in a reciprocating mode to achieve self-cleaning, frequent forward and reverse rotation of the motor is not needed, abrasion of mechanical parts is reduced, and the actual requirement for long-term reliable operation of power distribution equipment is better met.

Description

Technical Field

[0001] This invention belongs to the field of transformer tap adjustment technology, and in particular relates to a tap changer adjustment device for a non-excitation column transformer. Background Technology

[0002] In power distribution networks, pole-mounted transformers without excitation are key equipment. Due to their simple structure and reliable operation, they are widely used in rural power grids, remote areas, and urban distribution network branches. To ensure that the transformer can continuously output qualified low-voltage electricity under the current grid voltage conditions, when the input voltage fluctuates, it is necessary to adjust the transformer's voltage rating to keep the low-voltage side output voltage within the qualified range.

[0003] During long-term operation, transformer contacts are prone to oxidation and carbon buildup, leading to poor contact. Therefore, when adjusting the tap position, the tap changer needs to be rotated back and forth 3-5 times to generate a "self-cleaning" effect through mechanical friction, removing surface contaminants and ensuring tight contact between the contacts. This process directly affects the stability of the electrical connection and the current carrying capacity, and is an important standard for the maintenance of power equipment.

[0004] Existing patents, such as CN111863471B, disclose an automatic tap changer adjustment device for distribution transformers. This device uses a motor to drive the tap changer head to rotate and adjust the tap position, thus changing the traditional situation where transformer tap changers require manual adjustment. This saves manpower, improves work efficiency, and ensures the safety of construction workers.

[0005] The aforementioned automatic gear shifting device still has significant shortcomings in practical applications: 1. The above device requires the motor to frequently rotate forward and backward to operate the reciprocating gear knob. Frequent forward and reverse rotation will aggravate the wear of mechanical parts, reduce the service life of the mechanical structure, and generate large inrush current and torque fluctuations during the forward and reverse switching process. Over time, this will seriously affect the operating stability of the motor, increase the maintenance cost and failure risk of the device, and make it difficult to meet the actual needs of long-term reliable operation of power distribution equipment.

[0006] 2. The above-mentioned device does not have a buffer structure and directly drives the tap changer to rotate through the motor. For tap changers that have not been operated for a long time or have slight jamming, the instantaneous torque when the motor starts may be too large, causing the tap changer contacts to scrape or the mechanical structure to be damaged. In addition, when the tap changer is in the extreme position, the lack of a buffer mechanism can easily cause forced torsion damage, reducing the service life of the tap changer. Summary of the Invention

[0007] The purpose of this invention is to address the problems mentioned in the background section by providing a tap changer adjustment device for a non-excitation column-mounted transformer.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a tap changer adjustment device for a transformer without excitation column, comprising a base and an execution component disposed above the base, wherein the base and the execution component are connected and fixed by a multi-stage telescopic rod and a support arm; The execution component includes an outer cover located below the support arm, and the outer cover contains an insulating cap screwing component, a gear adjustment component, a limit rod push-button component, and a tap changer self-cleaning component.

[0009] Furthermore, the insulating cap screwing component includes a linear slide rail located on the top of the outer cover. A mounting rod is fixed on the slider of the linear slide rail. Two through holes are opened on the mounting rod, and movable rods are slidably fitted in the two through holes. An L-shaped plate is fixed to the top of the movable rod. Two first springs are provided between the lower surface of the horizontal end of the L-shaped plate and the upper surface of the mounting rod. The two first springs are respectively sleeved on the two movable rods. An electric rotating gripper is provided on the vertical side wall of the L-shaped plate. The electric rotating gripper is used to screw the insulating cap of the tap changer, and the linear slide rail is used to control the electric rotating gripper to move up / down.

[0010] Furthermore, the gear adjustment component includes an annular support plate rotatably connected to the inner wall of the outer cover. The annular support plate is provided with two opposing first mounting seats. A first rotary lever and a second rotary lever are rotatably connected to the two first mounting seats respectively. A mounting shaft is rotatably connected to the first rotary lever. A rotary head is fixed at the bottom of the mounting shaft. When the first rotary lever and the second rotary lever are in a horizontal state, they are engaged, and the rotary head is engaged with the tap changer. When the annular support plate rotates, it drives the first rotary lever and the second rotary lever to rotate for gear adjustment.

[0011] Furthermore, a keyway is provided on the mounting shaft, and a flat key is slidably fitted in the keyway. A slot adapted to the flat key is provided on the first rotary lever. A cylinder for pushing the flat key to move is provided at the top of the mounting shaft. When the flat key is in the slot, the first rotary lever rotates, driving the rotary head to rotate to adjust the gear.

[0012] Furthermore, the limiting rod push-button component includes an electric slide rail fixed to an annular support plate. A second mounting seat is fixed on the slider of the electric slide rail. A mounting block is rotatably connected to the second mounting seat. A hydraulic telescopic rod is fixed on the mounting block. A guide block is provided on the sleeve of the hydraulic telescopic rod. A triangular mounting plate is fixed to the output end of the hydraulic telescopic rod. Two through-type slide rods are fixed to the bottom of the triangular mounting plate. The two slide rods pass through the guide block and slide in cooperation with the guide block.

[0013] Furthermore, the tap changer self-cleaning component includes a fixed shaft fixed below the first rotary lever, a lever rotatably connected to the fixed shaft, a sector plate coaxially arranged with the fixed shaft fixed at one end of the lever, an arc-shaped rack coaxially arranged with the sector plate, and a cylindrical gear meshing with the arc-shaped rack on the mounting shaft.

[0014] Furthermore, a groove is provided on the arc surface of the sector plate, and an arc rod is fixed between the two side walls of the groove. The arc rack is slidably engaged with the arc rod, and a second spring is provided between the side wall of the arc rack and the side wall of the groove. The second spring is sleeved on the arc rod.

[0015] Furthermore, the tap changer self-cleaning component also includes a second motor fixed to the first rotary lever. A drive disk is fixed on the output shaft of the second motor. A cylindrical pin slidably engages with the drive disk and is eccentrically positioned on the drive disk. A cylinder for driving the cylindrical pin to move is fixed on the drive disk. A U-shaped groove is provided on the lever, and the cylindrical pin slidably engages with the U-shaped groove. When the second motor rotates, it drives the lever to reciprocate around the fixed axis.

[0016] Compared with existing technologies, the advantages of this invention are: 1. This invention features a self-cleaning component for the tap changer. By lever-driven reciprocating oscillation of a sector plate, the tap changer is reciprocated and turned to achieve self-cleaning. This eliminates the need for frequent forward and reverse rotation of the motor, reducing wear on mechanical components. Furthermore, it avoids the inrush current and torque fluctuations generated during motor forward and reverse switching, resulting in more stable motor operation, reduced failure risk, and better meeting the actual needs of long-term reliable operation of power distribution equipment.

[0017] 2. In the process of self-cleaning by reciprocating rotation of the tap switch of the present invention, the torque on the tap switch is gradually increased by setting a second spring until it is turned, making the tap switch start more gently and reducing the risk of damage to the tap switch due to sudden excessive force. When the tap switch is at the limit position, the second spring can also play a buffering role to avoid damage to the switch caused by forced twisting.

[0018] 3. During the self-cleaning process of the tap changer of this invention, after each revolution of the second motor, the eccentric distance of the cylindrical pin on the drive disc is adjusted to slowly increase the lever swing amplitude, thereby gradually increasing the reciprocating turning amplitude of the tap changer. This "progressive" operation avoids physical scraping or impact on the contact surface caused by direct large-amplitude operation. It is especially suitable for switches with long service life and slight oxidation or scale buildup on the contacts, effectively protecting the tap changer contacts and reducing the risk of mechanical damage. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of a tap changer adjustment device for a non-excitation column-mounted transformer provided by the present invention; Figure 2 This is a schematic diagram of the internal structure of the actuator component of the tap changer adjustment device for a non-excitation column-mounted transformer provided by the present invention; Figure 3 This is a schematic diagram of the insulating cap screwing component of a tap changer adjustment device for a non-excitation column transformer provided by the present invention; Figure 4 This is a schematic diagram of the gear adjustment component of a non-excitation column-mounted transformer tap changer adjustment device provided by the present invention; Figure 5 This is a schematic diagram of the gear adjustment component of a non-excitation column-mounted transformer tap changer adjustment device provided by the present invention from another angle. Figure 6 This is a schematic diagram of the limit rod pusher component of a tap changer adjustment device for a non-excitation column transformer provided by the present invention; Figure 7 This is a schematic diagram of the self-cleaning component of the tap changer adjustment device for a non-excitation column-mounted transformer provided by the present invention; Figure 8 This is a schematic diagram of the self-cleaning component of the tap changer of the tap changer adjustment device for a non-excitation column transformer provided by the present invention from another angle. Figure 9 This is a schematic diagram of the drive disc structure of a tap changer adjustment device for a non-excitation column-mounted transformer provided by the present invention.

[0020] In the picture, 100 is the base, 101 is the multi-stage telescopic rod, 102 is the support arm, and 103 is the camera; 201 Outer cover, 202 Linear slide rail, 203 Electric rotary gripper, 204 Mounting rod, 2041 Movable rod, 2042 L-shaped plate, 2043 first spring, 205 internal meshing gear, 206 annular support plate, 2061 first motor, 2062 drive gear, 207 first mounting base, 2071 first rotary lever, 2072 second rotary lever, 2073 mounting shaft, 20731 column gear, 2074 rotary head, 2075 keyway, 2076 flat key, 208 electric slide rail, 2081 second mounting base, 2082 mounting block, 2083 hydraulic telescopic rod, 2084 guide block, 2085 triangular mounting plate, 2086 slide rod, 209 fixed shaft, 2091 lever, 2092 sector plate, 2093 arc rack, 2094 second motor, 20921 groove, 20922 arc rod, 20923 second spring, 2095 drive disc, 2096 cylindrical pin, 2097 U-shaped groove. Detailed Implementation

[0021] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] like Figures 1-9 As shown, a tap changer adjustment device for a non-excitation column-mounted transformer includes a base 100 and an execution component disposed above the base 100. Specifically, a support arm 102 is fixed on the base 100 via a multi-stage telescopic rod 101. The bottom of the multi-stage telescopic rod 101 is detachably fixed to the base 100. During use, the multi-stage telescopic rod 101 can be held by hand to adjust the tap changer, or it can be fixed to the base 100 for adjustment. A camera 103 is provided at the end of the support arm 102. In this embodiment, the camera 103 is implemented using an industrial-grade CCD camera and is used to identify the tap changer position and the tap changer indicator. The actuation component includes an outer cover 201 located below the support arm 102. The bottom of the outer cover 201 is provided with multiple electromagnets, which are arranged in a circumferential array with the central axis of the outer cover 201 as the center. The electromagnets are used to attract and fix the outer cover 201 to the transformer. The actuation component also includes an insulating cap screwing component, a gear adjustment component, a limit rod push component, and a tap changer self-cleaning component located inside the outer cover 201. The insulating cap screwing component includes a linear slide rail 202 located on the top of the outer cover 201. The slider of the linear slide rail 202 is equipped with an electrically operated rotating gripper 203. Specifically, a mounting rod 204 is fixed to the slider of the linear slide rail 202. Two through holes are formed on the mounting rod 204, and a movable rod 2041 is slidably fitted within these holes. An L-shaped plate 2042 is fixed to the top of the movable rod 2041. Two first springs are provided between the lower surface of the horizontal end of the L-shaped plate 2042 and the upper surface of the mounting rod 204. 2043, two first springs 2043 are respectively sleeved on two movable rods 2041, and electric rotating gripper 203 is fixed on the vertical end side wall of L-shaped plate 2042. Electric rotating gripper 203 is used to turn the insulating cap of tap changer. Linear slide rail 202 is used to control the electric rotating gripper 203 to move up / down. L-shaped plate 2042 can move up and down to adapt to the up and down displacement generated during the turning of insulating cap. No changes are needed to the structure of electric rotating gripper 203. In actual operation, the linear slide rail 202 drives the electric rotating gripper 203 to move downward. Then, the electric rotating gripper 203 clamps the insulating cap of the tap changer and screws it. During the screwing of the insulating cap, the movable rod 2041 slides along the through hole to compensate for the displacement between the insulating cap and the transformer caused by the threaded fit. After the insulating cap is separated from the transformer, the linear slide rail 202 drives the electric rotating gripper 203 to move upward to avoid interference with other components. The gear adjustment component includes an annular support plate 206 rotatably connected to the inner wall of the outer cover 201. The annular support plate 206 is driven to rotate by a drive unit. Specifically, the drive unit includes an internal meshing gear 205 fixed to the inner wall of the outer cover 201. In this embodiment, the internal meshing gear 205 is located below the annular support plate 206. The annular support plate 206 is provided with a plurality of first motors 2061. In this embodiment, the number of first motors 2061 is four. The output shafts of the four first motors 2061 are all provided with a drive mechanism that meshes with the internal meshing gear 205. Drive gear 2062, when the first motor 2061 starts, the annular support plate 206 rotates under the cooperation of drive gear 2062 and internal meshing gear 205. Specifically, when the four first motors 2061 start synchronously, they drive drive gear 2062 to rotate. Since drive gear 2062 and fixed internal meshing gear 205 form a meshing transmission, under the interaction of the gear pair, drive gear 2062 performs planetary motion around the axis of internal meshing gear 205, thereby driving the annular support plate 206 to rotate circumferentially relative to the tap changer. The gear adjustment component also includes two opposing first mounting seats 207 fixed on the annular support plate 206. A first rotary lever 2071 and a second rotary lever 2072 are rotatably connected to the two first mounting seats 207, respectively. Specifically, in this embodiment, the first rotary lever 2071 and the second rotary lever 2072 are driven to rotate by a micro motor and a bevel gear. In the non-working state, both the first rotary lever 2071 and the second rotary lever 2072 are in a vertical position to avoid obstructing the up-and-down movement of the electric rotating gripper 203. The first rotary lever 2072 is rotatably connected to a mounting shaft 2073. A rotary head 2074 is fixed at the bottom of the mounting shaft 2073. The rotary head 2074 has a groove adapted to the tap changer. When the first rotary lever 2071 and the second rotary lever 2072 are in a horizontal state, they are engaged, and the rotary head 2074 is engaged with the tap changer. After the rotary head 2074 is engaged with the tap changer, the first rotary lever 2071 and the second rotary lever 2072 are rotated by the rotation of the annular support plate 206, thereby realizing gear adjustment. The mounting shaft 2073 has a keyway 2074, and a flat key 2076 is slidably fitted in the keyway 2074. The first rotary lever 2071 has a slot adapted to the flat key 2076. The top of the mounting shaft 2073 is equipped with a cylinder for pushing the flat key 2076 to move. Specifically, the top of the mounting shaft 2073 is fixed with an end cap, and a cylinder is fixed on the end cap. A connecting plate is fixed on the flat key 2076. The output shaft of the cylinder is fixedly connected to the connecting plate. When the output shaft of the cylinder extends, it pushes the flat key 2076 into the slot. At this time, the rotation of the first rotary lever 2071 can drive the rotary head 2074 to rotate for gear adjustment. When the output shaft of the cylinder shortens, the flat key 2076 is outside the slot. At this time, relative rotation can occur between the mounting shaft 2073 and the first rotary lever 2071. The limit lever pusher component includes an electric slide rail 208 fixed on an annular support plate 206. A second mounting base 2081 is fixed on the slider of the electric slide rail 208. A mounting block 2082 is rotatably connected to the second mounting base 2081. A hydraulic telescopic rod 2083 is fixed on the mounting block 2082. Specifically, the mounting block 2082 is driven to rotate by a micro motor and a bevel gear. In the non-working state, the hydraulic telescopic rod 2083 is in a vertical state to avoid interference with other components. A guide block 2084 is provided on the sleeve of the hydraulic telescopic rod 2083. A triangular mounting plate 2085 is fixed to the output end of the hydraulic telescopic rod 2083. Two through-slide rods 2086 are fixed to the bottom of the triangular mounting plate 2085. The two slide rods 2086 pass through the guide block 2084 and slide in cooperation with the guide block 2084. In actual operation, the hydraulic telescopic rod 2083 rotates from the vertical state to the horizontal state, and then the hydraulic telescopic rod 2083 extends, so that the limit rod of the tap changer is between the two slide rods 2086. Then the electric slide rail 208 drives the second mounting base 2081 to move and move the limit rod of the tap changer out of the limit groove. The self-cleaning component of the tap changer includes a fixed shaft 209 fixed below the first rotary lever 2071. A lever 2091 is rotatably connected to the fixed shaft 209. One end of the lever 2091 is fixed with a sector plate 2092 coaxially arranged with the fixed shaft 2099. An arc-shaped rack 2093 coaxially arranged with the sector plate 2092 is provided. A spur gear 20731 meshing with the arc-shaped rack 2093 is provided on the mounting shaft 2073. When the mounting shaft 2073 can rotate relative to the first rotary lever 2071, that is, when the flat key 2076 is outside the slot of the first rotary lever 2071, the arc-shaped rack 2093 swings back and forth, driving the mounting shaft 209 to swing back and forth, thereby causing the rotary head 2074 to reciprocate to turn the tap changer, realizing the self-cleaning operation of the tap changer. A groove 20921 is formed on the arc-shaped surface of the sector plate 2092. An arc-shaped rod 20922 is fixed between the two side walls of the groove 20921. An arc-shaped rack 2093 slides with the arc-shaped rod 20922. A second spring 20923 is provided between the side wall of the arc-shaped rack 2093 and the side wall of the groove 20921. The second spring 20923 is sleeved on the arc-shaped rod 20922. Specifically, the arc-shaped rack 2093 meshes with the spur gear 20731. The torque required for the spur gear 20731 to rotate must be greater than the torque required to rotate the tap changer. Therefore, when the sector plate 2092 moves, the arc-shaped rack 2093 remains stationary. The sector plate 2092 first compresses / stretches the second spring 20923. The second spring 20923 is continuously compressed, causing its elastic force to continuously increase. When the elastic force of the second spring 20923 increases... When the resistance of the tap changer can be overcome, the arc-shaped rack 2093 begins to move and drives the spur gear 20731 to rotate, thereby driving the tap changer to rotate. When the sector plate 2092 changes its swing direction, the arc-shaped rack 2093 remains stationary again. The second spring 20923 first resets and releases its elastic force. As the sector plate 2092 rotates, the second spring 20923 is compressed / stretched again to generate elastic force until the tap changer is turned. The torque on the tap changer always gradually increases until it is turned. For tap changers that have not been operated for a long time or may have slight jamming, this method can start the switch more gently and reduce the risk of mechanical damage caused by sudden excessive force. In addition, when the tap changer is in the limit position, the second spring 20923 can also play a buffering role to prevent the tap changer from being forcibly twisted and damaged. The tap changer self-cleaning component also includes a second motor 2094 fixed to the first rotary lever 2071. A drive disc 2095 is fixed to the output shaft of the second motor 2094. A cylindrical pin 2096, eccentrically positioned on the drive disc 2095, slides on the drive disc 2095. A cylinder for moving the cylindrical pin 2096 is fixed to the drive disc 2095. A U-shaped groove 2097 is formed on the lever 2091, and the cylindrical pin 2096 slides in contact with the U-shaped groove 2097. When the second motor 2094 rotates, it drives the lever 2091 to reciprocate around the fixed shaft 209. Specifically… The second motor 2094 drives the drive disc 2095 to rotate. The cylindrical pin 2096 on the drive disc 2095 cooperates with the U-shaped groove 2097 to drive the lever 2091 to swing back and forth. The cylinder can change the eccentric distance of the cylindrical pin 2096, thereby changing the swing amplitude of the lever 2091. In actual operation, the swing amplitude of the lever 2091 can be slowly increased after the second motor 2094 rotates once. This can avoid physical scratches or impacts on the contact surface that may be caused by direct large-amplitude operation. It can reduce mechanical damage, especially for switches that have been in operation for a long time and have slight oxidation or scale on the contacts.

[0023] The working principle of this invention is as follows: In use, the support arm 102 is first adjusted to an appropriate height by using the multi-stage telescopic rod 101. After the position of the tap changer is captured by the camera 103, the execution component is moved above the tap changer. Then, the execution component is moved down to the upper surface of the transformer to achieve the positioning of the execution component. After the execution component is positioned, the electromagnet is energized to attract and fix the outer cover 201 to the transformer. The linear slide rail 202 drives the electric rotary gripper 203 to move down, and then the electric rotary gripper 203 removes the insulating cap of the tap changer. Then the linear slide rail 202 drives the electric rotary gripper 203 to move up, so as to avoid interference with other components. During the process of the electric rotary gripper 203 tightening the insulating cap, the movable rod 2041 slides along the through hole to compensate for the displacement between the insulating cap and the transformer caused by the threaded fit. The hydraulic telescopic rod 2083 rotates from a vertical position to a horizontal position. Then the hydraulic telescopic rod 2083 extends, so that the limit rod of the tap changer is between the two slide rods 2086. Then the electric slide rail 208 drives the second mounting base 2081 to move and move the limit rod of the tap changer out of the limit groove. When the first rotary lever 2071 and the second rotary lever 2072 are rotated to a horizontal position, and the flat key 2076 is positioned outside the slot of the first rotary lever 2071 by the control of the cylinder, the second motor 2094 is then turned on. The second motor 2094 drives the drive disc 2095 to rotate. The cylindrical pin 2096 on the drive disc 2095 cooperates with the U-shaped groove 2097 to drive the lever 2091 to swing back and forth. The lever 2091 drives the sector plate 2092 to swing synchronously. When the sector plate 2092 moves, the arc rack 2093 remains stationary. The sector plate 2092 first compresses / stretches the second spring 20923. The second spring 20923 is continuously compressed, causing its elastic force to continuously increase. When the elastic force of the second spring 20923 can overcome the resistance of the tap changer, the arc rack 2093 begins to move and drives the spur gear 2093 to rotate, thereby driving the tap changer to rotate. When the sector plate 2092 changes its swing direction, the arc-shaped rack 2093 remains stationary again. The second spring 20923 first resets and releases its elastic force. As the sector plate 2092 rotates, the second spring 20923 is compressed / stretched again to generate elastic force until the tap changer is turned. The torque on the tap changer always gradually increases until it is turned. For tap changers that have not been operated for a long time or may have slight jamming, this method can start the switch more gently and reduce the risk of mechanical damage caused by sudden excessive force. In addition, when the tap changer is in the limit position, the second spring 20923 can also play a buffering role to prevent the tap changer from being forcibly twisted and damaged. In addition, during the back-and-forth adjustment of the tap changer, after the second motor 2094 rotates once, the swing amplitude of the lever 2091 is slowly increased by changing the eccentric distance of the cylindrical pin 2096, so that the tap changer is reciprocated and turned gradually. This can avoid physical scratches or impacts on the contact surface that may be caused by direct large-amplitude operation. In particular, for switches that have been in operation for a long time and have slight oxidation or scale on the contacts, mechanical damage can be reduced. After the tap changer performs its self-cleaning operation, the cylinder controls the flat key 2076 to be positioned in the slot of the first rotary lever 2071. Then, the first motor 2061 is started. When the four first motors 2061 start synchronously, they drive the annular support plate 206 to rotate, thereby driving the first rotary lever 2071 and the second rotary lever 2072 to rotate. Since the flat key 2076 is in the slot of the first rotary lever 2071 at this time, the rotation of the first rotary lever 2071 drives the mounting shaft 2073 and the rotary head 2074 to rotate, realizing the gear adjustment operation. During the gear adjustment process, the camera 103 identifies the gear position. After the gear adjustment is completed, the electric slide rail 208 drives the second mounting base 2081 to move and lock the limit rod of the tap changer back into the limit groove. Then, the hydraulic telescopic rod 2083 shortens and rotates to a vertical position. Subsequently, the second rotary lever 2072 and the first rotary lever 2071 rotate to a vertical position one after another. Then, the linear slide rail 202 drives the electric rotating gripper 203 to move down. The electric rotating gripper 203 installs the insulating cap on the tap changer. Then, the linear slide rail 202 drives the electric rotating gripper 203 to reset. Finally, the electromagnet is de-energized and the device is retracted, completing the gear adjustment work.

[0024] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tap changer adjustment device for a non-excitation column-mounted transformer, comprising a base (100) and an actuation component disposed above the base (100), wherein the base (100) and the actuation component are connected and fixedly connected by a multi-stage telescopic rod (101) and a support arm (102), characterized in that: The execution component includes an outer cover (201) located below the support arm (102), and the outer cover (201) contains an insulating cap screwing component, a gear adjustment component, a limit rod push-button component, and a tap changer self-cleaning component.

2. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 1, characterized in that, The insulating cap screwing component includes a linear slide rail (202) located on the top of the outer cover (201). A mounting rod (204) is fixed on the slider of the linear slide rail (202). Two through holes are provided on the mounting rod (204). Movable rods (2041) are slidably fitted in the two through holes. An L-shaped plate (2042) is fixed to the top of the movable rod (2041). Two first springs (2043) are provided between the lower horizontal surface of the L-shaped plate (2042) and the upper surface of the mounting rod (204). The two first springs (2043) are respectively sleeved on the two movable rods (2041). An electric rotating gripper (203) is provided on the vertical side wall of the L-shaped plate (2042). The electric rotating gripper (203) is used to screw the insulating cap of the tap changer. The linear slide rail (202) is used to control the electric rotating gripper (203) to move up / down.

3. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 1, characterized in that, The gear adjustment component includes an annular support plate (206) rotatably connected to the inner wall of the outer cover (201). The annular support plate (206) is provided with two opposing first mounting seats (207). A first rotary lever (2071) and a second rotary lever (2072) are rotatably connected to the two first mounting seats (207). A mounting shaft (2073) is rotatably connected to the first rotary lever (2072). A rotary head (2074) is fixed at the bottom of the mounting shaft (2073). When the first rotary lever (2071) and the second rotary lever (2072) are in a horizontal state, they are engaged. The rotary head (2074) is engaged with the tap switch. When the annular support plate (206) rotates, it drives the first rotary lever (2071) and the second rotary lever (2072) to rotate for gear adjustment.

4. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 3, characterized in that, The mounting shaft (2073) is provided with a keyway (2074), and a flat key (2076) is slidably fitted in the keyway (2074). The first rotary lever (2071) is provided with a slot adapted to the flat key (2076). The top of the mounting shaft (2073) is provided with a cylinder for pushing the flat key (2076) to move. When the flat key (2076) is in the slot, the first rotary lever (2071) rotates, driving the rotary head (2074) to rotate for gear adjustment.

5. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 3, characterized in that, The limiting rod push-button component includes an electric slide rail (208) fixed on an annular support plate (206). A second mounting seat (2081) is fixed on the slider of the electric slide rail (208). A mounting block (2082) is rotatably connected to the second mounting seat (2081). A hydraulic telescopic rod (2083) is fixed on the mounting block (2082). A guide block (2084) is provided on the sleeve of the hydraulic telescopic rod (2083). A triangular mounting plate (2085) is fixed at the output end of the hydraulic telescopic rod (2083). Two through slide rods (2086) are fixed at the bottom of the triangular mounting plate (2085). The two slide rods (2086) pass through the guide block (2084) and slide in cooperation with the guide block (2084).

6. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 5, characterized in that, The tap changer self-cleaning component includes a fixed shaft (209) fixed below the first rotary lever (2071). A lever (2091) is rotatably connected to the fixed shaft (209). One end of the lever (2091) is fixed with a sector plate (2092) coaxially arranged with the fixed shaft (209). An arc-shaped rack (2093) is provided on the sector plate (2092) coaxially arranged with it. A spur gear (20731) meshing with the arc-shaped rack (2093) is provided on the mounting shaft (2073).

7. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 6, characterized in that, The arc-shaped plate (2092) has a groove (20921) on its arc surface. An arc-shaped rod (20922) is fixed between the two side walls of the groove (20921). The arc-shaped rack (2093) is slidably engaged with the arc-shaped rod (20922). A second spring (20923) is provided between the side wall of the arc-shaped rack (2093) and the side wall of the groove (20921). The second spring (20923) is sleeved on the arc-shaped rod (20922).

8. The tap changer adjustment device for a non-excitation column-mounted transformer according to claim 7, characterized in that, The tap changer self-cleaning component also includes a second motor (2094) fixed on the first rotary lever (2071). A drive disc (2095) is fixed on the output shaft of the second motor (2094). A cylindrical pin (2096) eccentrically set on the drive disc (2095) is slidably engaged with the drive disc (2095). A cylinder for driving the cylindrical pin (2096) to move is fixed on the drive disc (2095). A U-shaped groove (2097) is provided on the lever (2091). The cylindrical pin (2096) is slidably engaged with the U-shaped groove (2097). When the second motor (2094) rotates, it drives the lever (2091) to swing back and forth around the fixed shaft (209).

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