A no-field on-column transformer gear adjusting device

Abstract

The present application belongs to the technical field of transformer gear adjustment, and particularly relates to a no-field excitation column transformer gear adjustment device, which comprises a supporting assembly, an executing assembly and a positioning camera. The supporting assembly comprises a base and a supporting rod arranged on the base. A supporting arm is arranged on the top of the supporting rod. The executing assembly is arranged below the supporting arm and is used for adjusting the transformer gear. The positioning camera is arranged on the supporting arm and is used for position calibration of the executing assembly. The supporting rod is a multi-stage telescopic rod. A connecting block is arranged on the top end of the supporting rod. One end of the supporting arm is fixed on the connecting block. The device is capable of screwing out and resetting the protective screw cap through cooperation of the linear slide rail and the electric rotary clamping jaw, and manual high-altitude operation is not needed. The device effectively avoids the high-altitude falling risk and electric shock hidden danger existing in high-altitude operation and improves the working efficiency of gear adjustment.

Description

Technical Field

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

[0002] Unexcited pole-mounted transformers are key equipment in power systems used for voltage conversion and power distribution. They are usually installed on poles 10-15 meters high. Their tap adjustment must be carried out in the power-off state in order to adjust the turns ratio according to changes in grid voltage and ensure power supply quality.

[0003] Traditional gear adjustment relies on manual operation. Workers need to carry tools, climb to the transformer installation location, manually remove the protective cover of the gear knob, press the positioning spring on the gear knob, rotate the knob to the target gear, and finally reset the protective cover. Although existing automated adjustment devices attempt to replace manual operation, such as the authorized patent CN111863471B which discloses an automatic gear adjustment device for a distribution transformer tap changer, in which construction personnel unscrew the protective cover of the tap changer on the transformer after power is cut off, and place the automatic gear adjustment device into the base for automatic gear adjustment, there are still shortcomings:

[0004] 1. Although the above-mentioned device realizes automatic adjustment of the gear, the staff still need to manually remove and install the protective cap before and after the gear adjustment. When adjusting the gear of the pole-mounted transformer, the staff still need to climb to a high place to adjust the gear. Manual climbing operation is easily affected by outdoor wind and rain, fall from height and other environmental and operational risks. In addition, there may be residual charge around the transformer, which increases the risk of electric shock.

[0005] 2. Transformer tap changers are usually equipped with limit devices, such as limit springs and positioning pins, to restrict the free rotation of the gear adjustment knob. When adjusting the gear, the positioning pin needs to be pulled out manually until the gear adjustment is completed, and then the positioning pin is released. The degree of automation of gear adjustment is low, the workload of workers is high, and the work efficiency is low.

[0006] 3. In environments with high humidity, the tap changer knob is prone to "rusting and seizing," making it difficult to turn the knob during adjustment. When the existing device encounters a "rusted and seizing" knob, it can only be forcibly adjusted by twisting it forcefully. This method can easily damage the knob and, in severe cases, may damage the transformer, thus affecting normal power supply. In addition, if the knob is severely "rusted and seizing" and cannot be turned, forcibly turning the motor will damage the motor. Summary of the Invention

[0007] The purpose of this invention is to address the problems mentioned in the background art by providing a tap 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 position adjustment device for a non-excitation column-mounted transformer, comprising:

[0009] A support assembly includes a base and a support rod disposed on the base, wherein a support arm is provided at the top of the support rod;

[0010] An actuation component, located below the support arm, is used to adjust the transformer speed.

[0011] A positioning camera is mounted on the support arm for position calibration of the execution component.

[0012] Furthermore, the support rod is a multi-stage telescopic rod, and a connecting block is provided at the top of the support rod, with one end of the support arm fixed to the connecting block.

[0013] Furthermore, the execution component includes:

[0014] The outer cover is fixed to the bottom of the support arm by a connecting rod;

[0015] Multiple electromagnets are arranged in a circular array at the bottom of the outer cover to attract and fix the outer cover to the transformer.

[0016] A cap clamping component is located inside the upper part of the outer cover and is used to clamp and stably remove the outer protective cap of the transformer gear knob;

[0017] The gear selector knob is located below the cover clamping component and is used to perform clockwise / counterclockwise rotation of the gear selector knob.

[0018] The spring-loaded push-button component is used to release / reset the gear selector knob.

[0019] Furthermore, the cap clamping component includes a linear slide rail and an electric rotating jaw. The linear slide rail is fixed inside the upper part of the outer cover, and the electric rotating jaw is fixed on the slider of the linear slide rail. The electric rotating jaw is used to unscrew the protective cap from the transformer, and the linear slide rail is used to move the protective cap to expose the gear knob for subsequent gear adjustment.

[0020] Furthermore, the clamping jaws of the electric rotary gripper include an outer clamping plate and an inner clamping plate. A limiting block is provided on the side wall of the inner clamping plate. A rectangular groove is provided on the outer clamping plate to slide with the limiting block. A limiting rod is provided in the rectangular groove to pass through the limiting block. Springs are provided on both the upper and lower sides of the limiting block, and the springs are sleeved outside the limiting rods. The sliding cooperation between the inner clamping plate and the outer clamping plate provides space for the vertical displacement generated when the cap is turned.

[0021] Furthermore, the gear selector knob includes a rotary unit and a rotating unit. The rotating unit includes an internal meshing gear that rotates and engages with the inner wall of the outer cover via a damping bearing. Above the internal meshing gear is an annular support plate that rotates and engages with the inner wall of the outer cover. The annular support plate is provided with multiple rotary motors, and the output shaft of the rotary motor is provided with a drive gear that engages with the internal meshing gear.

[0022] Furthermore, the rotary unit includes a first U-shaped frame fixed to an annular support plate, a rotary lever rotatably fitted on the first U-shaped frame, a first electric push rod rotatably connected to the rotary lever, and the other end of the first electric push rod rotatably fitted with the first U-shaped frame. When the first electric push rod extends / retracts, the rotary lever swings up / down.

[0023] Furthermore, the spring-loaded pusher component includes a mounting plate fixed to an annular support plate, a second electric push rod fixed on the mounting plate, a second U-shaped frame fixed to the output end of the second electric push rod, and a third electric push rod and a fourth electric push rod provided on the second U-shaped frame. When the second electric push rod extends / retracts, the third electric push rod / fourth electric push rod resets / picks out the spring.

[0024] Furthermore, the connecting ring is a damping bearing, and an annular gear slide rail is provided on the inner wall of the outer cover below the internal meshing gear. An electric sprayer is provided on the slider of the annular gear slide rail, and the electric sprayer is filled with rust remover. The opening / closing of the annular gear slide rail and the electric sprayer is controlled by the rotation / stationary state of the internal meshing gear, and the rotary motor automatically shuts off when the annular gear slide rail and the electric sprayer are opened.

[0025] Furthermore, the torque required for the damping bearing to rotate is greater than the torque required for the gear knob to rotate. Under normal circumstances, after the rotary lever clamps the gear knob, the rotary motor drives the annular support plate to rotate when it starts to achieve gear adjustment. When the gear knob is rusted, the rotary motor drives the internal meshing gear to rotate when it starts, thereby triggering the rust removal process and opening the annular gear slide rail and electric sprayer to perform rust removal.

[0026] Compared with existing technologies, the advantages of this invention are:

[0027] 1. This invention achieves the unscrewing and resetting of the protective cap by using a linear slide rail and an electric rotating gripper, eliminating the need for manual climbing and effectively avoiding the risks of falls from heights and electric shocks associated with climbing operations, while also improving the efficiency of gear adjustment.

[0028] 2. This invention automatically achieves the ejection and resetting of the limiting spring through the spring-pressing component, without manual intervention. Furthermore, during the process of the fourth electric push rod ejecting the spring, the third electric push rod acts as a limiter, which can prevent the limiting spring from being ejected excessively. During the process of the third electric push rod resetting the spring, the fourth electric push rod acts as a limiter, which can prevent the limiting spring from being reset excessively.

[0029] 3. This invention protects the gear selector knob and rotary motor by setting a damping bearing. At the same time, the damping bearing can intelligently determine whether the gear selector knob is rusted. When the gear selector knob is rusted, after the rotary motor is started, the internal meshing gear will overcome the resistance of the damping bearing to rotate, avoiding damage to the gear selector knob caused by violent rotation. It can also prevent damage to the rotary motor when the gear selector knob cannot be turned.

[0030] 4. This invention automatically triggers a rust removal process after determining that the gear knob is rusted, performs rust removal on the gear knob, and attempts to adjust the gear again after rust removal. After a maximum of 5 rust removal and gear adjustment attempts, the success rate of automatic gear adjustment is effectively improved. If the gear shifting still works normally after 5 rust removals, it indicates that the gear knob is severely rusted or malfunctioning. The ground terminal sends an alarm signal to remind the staff to manually adjust the gear and maintain the equipment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a non-excitation column transformer tap adjustment device provided by the present invention;

[0032] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0033] Figure 3 This is a schematic diagram of the internal structure of the outer casing of a non-excitation column transformer tap adjustment device provided by the present invention;

[0034] Figure 4 This is a schematic diagram of the linear slide rail structure in a non-excitation column transformer tap adjustment device provided by the present invention;

[0035] Figure 5 This is a schematic diagram of the electric rotating gripper structure in a non-excitation column transformer gear adjustment device provided by the present invention;

[0036] Figure 6 yes Figure 5 Enlarged view at point B in the middle;

[0037] Figure 7 This is a schematic diagram of the gear knob adjustment component in a gear adjustment device for a non-excitation column transformer provided by the present invention;

[0038] Figure 8This is a schematic diagram of the ring gear slide rail structure in a non-excitation column transformer gear adjustment device provided by the present invention;

[0039] Figure 9 This is a schematic diagram of the cooperation structure between the gear knob rotary component and the transformer gear knob in a gear adjustment device for a non-excitation column transformer provided by the present invention.

[0040] Figure 10 This is a flowchart illustrating the operation of a non-excitation column-mounted transformer gear adjustment device provided by the present invention.

[0041] In the diagram, 100 is the base, 101 is the support rod, 102 is the support arm, 103 is the positioning camera, and 104 is the connecting block.

[0042] 201 Outer cover, 202 Connecting rod, 203 Electromagnet, 204 Linear slide rail, 205 Electric rotary gripper;

[0043] 2051 Outer clamping plate, 2052 Inner clamping plate, 2053 Limiting block, 2054 Rectangular groove, 2055 Limiting rod, 2056 Spring;

[0044] 2060 Connecting ring, 2061 Internal meshing gear, 2062 Annular support plate, 2063 Rotary motor, 2064 Drive gear, 2065 First U-shaped frame, 2066 Rotary lever, 2067 First electric push rod;

[0045] 2071 Mounting plate, 2072 Second electric push rod, 2073 Second U-shaped frame, 2074 Third electric push rod, 2075 Fourth electric push rod;

[0046] 2081 Ring gear slide rail, 2082 Electric spray bottle. Detailed Implementation

[0047] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0048] Example 1

[0049] like Figures 1-9As shown, a non-excitation column-mounted transformer gear adjustment device includes a support assembly, an execution assembly, and a positioning camera 103. The support assembly includes a base 100 and a support rod 101 mounted on the base 100. A support arm 102 is provided at the top of the support rod 101. Specifically, the support rod 101 is detachably and fixedly connected to the base 100. During use, the operator can hold the support rod 101 by hand or fix it to the base 100 for operation. The support rod 101 is a multi-stage telescopic rod, with the rod sections fixed by an electromagnetic locking mechanism. It is suitable for gear adjustment of transformers of different heights. The base 100 is equipped with casters at the bottom for easy movement. The base 100 also has four adjustable anchor bolts to restrict the movement of the base. In addition, the anchor bolts can also calibrate the level of the base to prevent the device from tilting due to uneven bottom surface. The base has reserved space for the built-in lithium battery and PLC controller to drive the various electric components and receive signals from the positioning camera 103. The top of the support rod 101 is provided with a connecting block 104, and one end of the support arm 102 is fixed to the connecting block 104. The execution component is located below the support arm 102 and is used to adjust the transformer gear. The positioning camera 103 is located on the support arm 102, with the lens facing downwards from the execution component. The resolution of the positioning camera 103 is ≥2 million pixels. It has automatic focus and night vision functions and can capture images of the transformer gear knob area in real time and transmit the images to the ground control terminal for position calibration of the execution component and confirmation of the gear.

[0050] The actuation component includes an outer cover 201, multiple electromagnets 203, a cap clamping component, a gear knob toggle component, and a spring-loaded push-button component. The outer cover 201 is a hollow cylindrical shape with an opening at the bottom. The outer cover 201 is fixed to the support arm 102 below by a connecting rod 202. Multiple electromagnets 203 are arranged in a circumferential array at the bottom of the outer cover 201 to attract and fix the outer cover 201 to the transformer. Specifically, the electromagnets 203 have a rated voltage of 24V and a suction force of ≥500N. After being energized, they can be tightly attracted to the metal shell of the transformer, providing a stable fixing force for the actuation component.

[0051] The cap clamping component includes a linear slide rail 204 and an electric rotating gripper 205. The linear slide rail 204 is used to move the protective cap to expose the gear knob for easy gear adjustment. Specifically, the linear slide rail 204 is a miniature electric linear slide rail and is fixed to the upper part of the outer cover 201 by a bracket. The electric rotating gripper 205 is fixed to the slider of the linear slide rail 204. The linear slide rail 204 is driven by a stepper motor, which can drive the electric gripper 205 to move in the vertical direction to realize the removal and reset of the protective cap.

[0052] The electric rotary gripper 205 includes an outer gripping plate 2051 and an inner gripping plate 2052. A limiting block 2053 is provided on the side wall of the inner gripping plate 2052. A rectangular groove 2054 is provided on the outer gripping plate 2051 to slide with the limiting block 2053. A limiting rod 2055 is provided in the rectangular groove 2054 to pass through the limiting block 2053. Springs 2056 are provided on both the upper and lower sides of the limiting block 2053, and the springs 2056 are sleeved on the outside of the limiting rod 2055. The sliding cooperation between the inner gripping plate 2052 and the outer gripping plate 2051 provides space for the vertical displacement generated when the protective cap is turned. The gripping and rotation of the electric rotary gripper 205 are achieved by existing technology, which will not be described in detail here.

[0053] The gear selector knob includes a rotary unit and a rotating unit. The rotating unit provides power for the rotation of the gear selector knob. The rotating unit includes an internal meshing gear 2061 fixed to the inner wall of the outer cover 201 via a connecting ring 2060. Above the internal meshing gear 2061 is an annular support plate 2062 that rotates with the inner wall of the outer cover 201. Multiple rotary motors 2063 are mounted on the annular support plate 2062. Specifically, the rotary motors 2063 are miniature DC servo motors. The annular support plate 2062 has motor mounting holes. The rotary motors 2063 are fixed to the annular support plate 2062 with bolts. The output shaft of the rotary motors 2063 is equipped with a drive gear 2064 that meshes with the internal meshing gear 2061. When the rotary motors 2063 start, the annular support plate 2062 rotates under the action of gear meshing to perform gear adjustment. Multiple motors start synchronously, which can provide stable torque output and avoid excessive load on a single motor.

[0054] The rotary unit includes a first U-shaped frame 2065 fixed on an annular support plate 2062, a rotary lever 2066 rotatably fitted on the first U-shaped frame 2065, a first electric push rod 2067 rotatably connected to the rotary lever 2066, and the other end of the first electric push rod 2067 rotatably fitted with the first U-shaped frame 2065. In its natural state, the first electric push rod 2067 is in an extended state, and the rotary lever 2066 is in an upward state. When the first electric push rod 2067 is shortened, the rotary lever swings downward to a horizontal state to lock the gear knob, thus cooperating with the rotary unit to perform gear adjustment.

[0055] The spring-loaded push-button component is used to release / reset the limiting spring of the gear knob. The spring-loaded push-button component includes a mounting plate 2071 fixed to an annular support plate 2062. A second electric push rod 2072 is fixed on the mounting plate 2071. The second electric push rod 2072 is a miniature electric push rod, and its cylinder end is bolted to the mounting plate 2071. A second U-shaped frame 2073 is fixed to the output end of the second electric push rod 2072. A third electric push rod 2074 and a fourth electric push rod 2075 are provided on the second U-shaped frame 2073. Both the third electric push rod 2074 and the fourth electric push rod 2075 are miniature electric push rods. During operation, the second electric push rod... The extension of 2072 places the third electric push rod 2074 inside the limiting spring. Subsequently, the third electric push rod 2074 and the fourth electric push rod 2075 extend, followed by the shortening of the second electric push rod 2072. The fourth electric push rod 2075 then lifts the limiting spring out of the limiting groove. During this process, the third electric push rod 2074 acts as a limiter to prevent the limiting spring from being excessively lifted out. After the limiting spring is lifted out, the gear adjustment is performed. After the gear adjustment is completed, the second electric push rod 2072 extends, and the third electric push rod 2074 presses the limiting spring back into the limiting groove. During this process, the fourth electric push rod 2075 acts as a limiter to prevent the limiting spring from being excessively compressed.

[0056] The working principle of this embodiment is as follows:

[0057] Component position calibration: The operator moves the device to a flat surface under the transformer, rotates the anchor bolts of the base 100 to make the base 100 horizontal, sends a signal through the ground control terminal, and the PLC controller controls the support rod 101 to extend. The support arm 102 rises with the support rod 101, bringing the actuator closer to the transformer gear knob area. The positioning camera 103 captures a real-time image of the transformer surface and transmits the image to the ground terminal. The operator observes the image through the terminal and adjusts the position of the support rod 101 by moving the base 100 or holding the support rod 101 to calibrate the actuator, aligning the center of the actuator's outer cover 201 with the center of the gear knob, thus completing the position calibration.

[0058] Outer cover 201 positioning: After the component position calibration is completed, the PLC controller controls the support rod 101 to shorten until the bottom of the outer cover 201 is attached to the upper surface of the transformer. The PLC controller sends a signal to the electromagnet 203, and the electromagnet 203 is energized to generate a suction force, which tightly attaches the outer cover 201 to the transformer shell.

[0059] To determine if the outer cover 201 is offset: the positioning camera 103 takes another image to confirm that the outer cover 201 is not offset. If it is offset, the electromagnet 203 is de-energized and recalibrated by the moving base 100 until the outer cover 201 is in the correct position. Then the electromagnet 203 is energized to fix the outer cover 201.

[0060] Protective cap removal: The PLC controller drives the linear slide rail 204 to move the electric rotary gripper 205 downwards and close to the protective cap. Then the electric rotary gripper 205 clamps the protective cap and unscrews it. After the cap is unscrewed, the linear slide rail 204 starts again to drive the electric rotary gripper 205 to move upwards and expose the gear knob.

[0061] Rotary lever 2066 engages the gear position knob: The PLC controller drives the first electric push rod 2067 to extend, pushing the rotary lever 2066 to swing downwards to a horizontal state and engage the gear position knob.

[0062] Limit spring ejection: The PLC controller drives the second electric push rod 2072 to extend, causing the second U-shaped frame 2073 to approach the limit spring of the gear knob. Then, the third electric push rod 2074 and the fourth electric push rod 2075 extend, so that the limit spring is between the third electric push rod 2074 and the fourth electric push rod 2075. Then, the second electric push rod 2072 shortens, and the fourth electric push rod 2075 ejects the limit spring from the limit slot on the tap changer, and the limit spring releases the restriction on the gear knob.

[0063] When the rotary motor 2063 is started, the annular support plate 2062 rotates under the action of gear meshing to perform gear adjustment. During the gear adjustment process, the positioning camera 103 captures the knob scale and provides real-time feedback on the gear position. When the knob reaches the target gear, the PLC controller shuts down the rotary motor 2063.

[0064] Reset of limit spring and rotary lever 2066: After the gear reaches the target position, the PLC controller controls the first, second, third and fourth electric push rods to work and reset the limit spring and rotary lever 2066 respectively. The reset process of the limit spring and rotary lever 2066 will not be described in detail here.

[0065] Protective cap reset: The PLC controller controls the linear slide rail 204 and the electric rotary gripper 205 to reset the protective cap. The reset process of the protective cap will not be described in detail here.

[0066] Equipment recovery: The PLC controller drives the electromagnet 203 to de-energize, releasing the outer cover 201 from its attraction. Then, the actuator is removed and recovered, and the device is transported to the storage vehicle. The adjustment is completed.

[0067] Example 2

[0068] The difference between this embodiment and embodiment 1 is that the connecting ring 2060 is a damping bearing, and an annular gear slide rail 2081 is provided on the inner wall of the outer cover 201 below the internal meshing gear 2061. A micro gear motor is provided on the slider of the annular gear slide rail 2081. The gear meshes with the inner gear ring of the slide rail, which can drive the slider to move along the circumference of the slide rail. An electric spray bottle 2082 is provided on the slider of the annular gear slide rail 2081. The electric spray bottle 2082 is a micro pressure spray bottle with a capacity of 100mL. The electric spray bottle 2082 is filled with rust remover. The opening / closing of the annular gear slide rail 2081 and the electric spray bottle 2082 is controlled by the rotation / stationary state of the internal meshing gear 2061. When the annular gear slide rail 2081 and the electric spray bottle 2082 are opened, the rotary motor 2063 automatically shuts off.

[0069] The torque required for the damping bearing to rotate is greater than the torque required for the gear knob to rotate. Under normal circumstances, after the rotary lever 2066 locks the gear knob, the rotary motor 2063 starts and drives the annular support plate 2062 to rotate to achieve gear adjustment. When the gear knob is rusted, the rotary motor 2063 starts and drives the internal meshing gear 2061 to rotate, thereby triggering the rust removal process and opening the annular gear slide rail 2081 and the electric spray bottle 2082 to perform rust removal.

[0070] Specifically, the annular gear slide rail 2081, the electric spray bottle 2082, and the rotary motor 2063 are linked together via a PLC controller.

[0071] When the internal meshing gear 2061 is stationary, that is, during normal gear adjustment, the PLC controller detects that there is no rotation signal of the internal meshing gear, the ring gear slide rail 2081 and the electric spray bottle 2082 remain closed, and the rotary motor works normally to adjust the gear.

[0072] When the internal meshing gear 2061 rotates, indicating that the gear knob is rusted and stuck, the PLC controller detects the rotation signal through the Hall sensor on the internal meshing gear 2061 and immediately sends a signal to shut down the rotary motor 2063. At the same time, it starts the ring gear slide rail 2081 and the electric sprayer 2082. The electric sprayer 2082 rotates around the gear knob and sprays rust remover onto the gear knob. After the electric sprayer 2082 completes one revolution, the PLC controller shuts down the ring gear slide rail 2081 and the electric sprayer 2082, allowing it to stand for 30 seconds to allow the rust remover to fully penetrate. Then, the rotary motor 2063 is restarted, and the gear is tried to be adjusted again. If the gear still cannot be adjusted, the above rust removal process is repeated, up to a maximum of 5 times. If the gear still cannot be adjusted normally, the PLC controller controls the ground terminal to issue an alarm, prompting personnel to handle and perform maintenance.

[0073] like Figure 10 As shown, the working principle of this embodiment includes the following steps:

[0074] Component position calibration: The operator moves the device to a flat surface under the transformer, rotates the anchor bolts of the base 100 to make the base 100 horizontal, sends a signal through the ground control terminal, and the PLC controller controls the support rod 101 to extend. The support arm 102 rises with the support rod 101, bringing the actuator closer to the transformer gear knob area. The positioning camera 103 captures a real-time image of the transformer surface and transmits the image to the ground terminal. The operator observes the image through the terminal and adjusts the position of the support rod 101 by moving the base 100 or holding the support rod 101 to calibrate the actuator, aligning the center of the actuator's outer cover 201 with the center of the gear knob, thus completing the position calibration.

[0075] Outer cover 201 positioning: After the component position calibration is completed, the PLC controller controls the support rod 101 to shorten until the bottom of the outer cover 201 is attached to the upper surface of the transformer. The PLC controller sends a signal to the electromagnet 203, and the electromagnet 203 is energized to generate a suction force, which tightly attaches the outer cover 201 to the transformer shell.

[0076] To determine if the outer cover 201 is offset: the positioning camera 103 takes another image to confirm that the outer cover 201 is not offset. If it is offset, the electromagnet 203 is de-energized and recalibrated by the moving base 100 until the outer cover 201 is in the correct position. Then the electromagnet 203 is energized to fix the outer cover 201.

[0077] Protective cap removal: The PLC controller drives the linear slide rail 204 to move the electric rotary gripper 205 downwards and close to the protective cap. Then the electric rotary gripper 205 clamps the protective cap and unscrews it. After the cap is unscrewed, the linear slide rail 204 starts again to drive the electric rotary gripper 205 to move upwards and expose the gear knob.

[0078] Rotary lever 2066 engages the gear position knob: The PLC controller drives the first electric push rod 2067 to extend, pushing the rotary lever 2066 to swing downwards to a horizontal state and engage the gear position knob.

[0079] Limit spring ejection: The PLC controller drives the second electric push rod 2072 to extend, causing the second U-shaped frame 2073 to approach the limit spring of the gear knob. Then, the third electric push rod 2074 and the fourth electric push rod 2075 extend, so that the limit spring is between the third electric push rod 2074 and the fourth electric push rod 2075. Then, the second electric push rod 2072 shortens, and the fourth electric push rod 2075 ejects the limit spring from the limit slot on the tap changer, and the limit spring releases the restriction on the gear knob.

[0080] Start the rotary motor 2063:

[0081] The gear adjustment process begins, and is divided into the following two operating conditions:

[0082] Operating Condition 1: The gear knob is not rusted and enters normal gear adjustment. Since the torque required for the damping bearing to rotate is greater than the torque required for the gear knob to rotate, after the rotary motor 2063 starts, the annular support plate 2062 rotates around the center of the outer cover 201. The rotary lever 2066 rotates with the annular support plate 2062, driving the gear knob to rotate synchronously to achieve gear adjustment. During the gear adjustment process, the positioning camera 103 captures the knob scale and provides real-time feedback on the gear position. When the knob reaches the target gear, the PLC controller shuts down the rotary motor 2063.

[0083] Operating Condition 2: The gear selector knob is stuck due to rust. Since the knob is stuck and cannot be turned, after the rotary motor 2063 starts, the internal meshing gear 2061 begins to rotate, overcoming the damping torque of the damping bearing. The Hall sensor on the internal meshing gear 2061 transmits the rotation signal to the PLC controller, which immediately shuts down the rotary motor 2063. This condition can be categorized into two scenarios:

[0084] 1. When the number of rotations of the internal meshing gear 2061 is less than or equal to the 5th time, the PLC controller controls the start of the ring gear slide rail 2081 and the electric sprayer 2082. The slider drives the electric sprayer 2082 to rotate around the gear knob while spraying rust remover to ensure that the knob is evenly covered with rust remover. After spraying the rust remover, the PLC controller controls the device to stand still for 30 seconds to allow the rust remover to penetrate. After standing still for 30 seconds, try to adjust the gear again.

[0085] 2. If the number of rotations of the internal meshing gear 2061 is greater than 5, it is determined that the gear knob is severely rusted or has other faults, requiring manual intervention to adjust the gear and maintain the transformer equipment. The ground terminal will send an alarm signal to remind the staff to intervene manually.

[0086] Limit spring and rotary lever 2066 reset: After the gear reaches the target or the ground terminal sends an alarm signal, the PLC controller controls the first, second, third and fourth electric push rods to work and reset the limit spring and rotary lever 2066 respectively. The reset process of the limit spring and rotary lever 2066 will not be described in detail here.

[0087] Protective cap reset: The PLC controller controls the linear slide rail 204 and the electric rotary gripper 205 to reset the protective cap. The reset process of the protective cap will not be described in detail here.

[0088] Equipment recovery: The PLC controller drives the electromagnet 203 to de-energize, releasing the outer cover 201 from its attraction. Then, the actuator is removed and recovered, and the device is transported to the storage vehicle.

[0089] File adjustment completed: If the ground terminal does not issue an alarm signal, the file adjustment work is completed. If the ground terminal issues an alarm signal, manual file adjustment and maintenance are required until the file adjustment is completed.

[0090] When adjusting gears without any rust or seizing abnormalities, the present invention automates the disassembly and assembly of the protective cover, the removal of the limit spring, and the rotation adjustment of the gear knob, completely eliminating manual climbing operations, avoiding the risk of falls from heights and electric shocks, and effectively improving the efficiency of gear adjustment work.

[0091] When the gear selector knob becomes stuck due to rust, the damping bearing can automatically detect the abnormality and promptly cut off the power to the rotary motor to protect both the knob and the motor, preventing damage from violent twisting. Simultaneously, it automatically triggers the rust removal function to repair the knob. After rust removal, it attempts to adjust the gear again, and the rust removal process can be repeated up to 5 times, effectively improving the success rate of gear adjustment. If the gear cannot be adjusted normally after 5 rust removal attempts, it indicates that the gear selector knob is severely rusted or has other malfunctions. The ground terminal will then issue an alarm signal to remind staff to manually adjust the gear and perform maintenance.

[0092] 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 no-load on-column transformer tap adjusting device, characterized by, The utility model relates to a kind of transformer position adjusting device, including: Supporting assembly, including base (100) and the supporting rod (101) on the base (100), the supporting rod (101) top is equipped with support arm (102); Execution component, is equipped below the support arm (102), for adjusting transformer gear, and the execution component includes: Cover (201), the cover (201) is fixed below supporting arm (102) by connecting rod (202); Rotary cap clamping part, is equipped in the cover (201) inside upper side, for the clamping and stable removal of protective rotary cap outside transformer gear knob, the rotary cap clamping part includes straight line sliding rail (204) and electric rotary jaw (205), the clamping jaw of electric rotary jaw (205) includes outer clamping plate (2051) and inner clamping plate (2052), limit block (2053) is equipped on the side wall of inner clamping plate (2052), rectangular slot (2054) is opened in outer clamping plate (2051), and limit block (2053) is slidably matched, limit rod (2055) is equipped in rectangular slot (2054) and passes through limit block (2053), spring (2056) is equipped on the upper and lower sides of limit block (2053), and the spring (2056) is sleeved on the outside of limit rod (2055), and the inner clamping plate (2052) and outer clamping plate (2051) slidably matched provide space for the up and down displacement generated when protective rotary cap is screwed; Positioning camera (103), is equipped on the support arm (102), for the position calibration of execution component.

2. A no-load on-column transformer tap adjusting device according to claim 1, characterized in that, The supporting rod (101) uses multistage telescopic rod, and the supporting rod (101) top is equipped with connecting block (104), and one end of the support arm (102) is fixed on connecting block (104).

3. A no-load on-column transformer tap adjusting device according to claim 1, characterized in that, The execution component further includes: A plurality of electromagnets (203) are arranged in a circular array at the bottom of the cover (201) to adsorb and fix the cover (201) on the transformer; Gear knob rotating part, is equipped below the rotary cap clamping part, for completing clockwise / anticlockwise rotation operation to gear knob; Spring pressing part, for picking out / returning the spring of gear knob.

4. A no-load on-column transformer tap adjusting device according to claim 1, characterized in that, The straight line sliding rail (204) is fixed to the upper side of the inside of the cover (201), the electric rotary jaw (205) is fixed to the slider of the straight line sliding rail (204), the electric rotary jaw (205) is used to screw out the protective rotary cap from the transformer, and the straight line sliding rail (204) is used to move the protective rotary cap to expose the gear knob to facilitate subsequent gear adjusting work.

5. A no-load on-column transformer tap adjusting device according to claim 3, characterized in that, The rotating knob rotating part comprises a rotating unit and a rotating unit, the rotating unit comprises an internal gear (2061) fixed on the inner wall of the outer cover (201) through a connecting ring (2060), an annular support plate (2062) is arranged above the internal gear (2061) and rotates with the inner wall of the outer cover (201), a plurality of rotating motors (2063) are arranged on the annular support plate (2062), and a driving gear (2064) matched with the internal gear (2061) is arranged on the output shaft of the rotating motor (2063).

6. A no-load on-column transformer tap adjusting device according to claim 5, characterized in that, The rotating unit comprises a first U-shaped frame (2065) fixed on the annular support plate (2062), the first U-shaped frame (2065) is rotatably matched with a rotating rod (2066), the rotating rod (2066) is rotatably connected with a first electric push rod (2067), the other end of the first electric push rod (2067) is rotatably matched with the first U-shaped frame (2065), and when the first electric push rod (2067) is elongated / shortened, the rotating rod (2066) swings upward / downward.

7. A no-load on-column transformer tap adjusting device according to claim 5, characterized in that, The elastic sheet pressing part comprises a mounting plate (2071) fixed on the annular support plate (2062), the mounting plate (2071) is fixed with a second electric push rod (2072), the output end of the second electric push rod (2072) is fixed with a second U-shaped frame (2073), the second U-shaped frame (2073) is provided with a third electric push rod (2074) and a fourth electric push rod (2075), and when the second electric push rod (2072) is elongated / shortened, the third electric push rod (2074) / the fourth electric push rod (2075) is reset / picked out the elastic sheet.

8. A no-load on-column transformer tap adjusting device according to claim 6, characterized in that, The connecting ring (2060) is a damping bearing, the inner wall of the outer cover (201) below the internal gear (2061) is provided with an annular gear slide rail (2081), the sliding block of the annular gear slide rail (2081) is provided with an electric sprinkler (2082), the electric sprinkler (2082) is provided with a rust remover, and the opening / closing of the annular gear slide rail (2081) and the electric sprinkler (2082) is controlled by the rotation / static of the internal gear (2061), and the rotating motor (2063) is automatically closed when the annular gear slide rail (2081) and the electric sprinkler (2082) are opened.

9. A no-load on-column transformer tap adjusting device according to claim 8, characterized in that, The torque required for the damping bearing to rotate is greater than the torque required for the gear knob to rotate, under normal circumstances, after the rotating rod (2066) clamps the gear knob, the rotating motor (2063) is started to drive the annular support plate (2062) to rotate to realize gear shifting, when the gear knob is rusted, the rotating motor (2063) is started to drive the internal gear (2061) to rotate, thereby triggering the rust removal process to make the annular gear slide rail (2081) and the electric sprinkler (2082) open for rust removal work.

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