Auxiliary equipment and method for replacing current transformer of high-voltage chamber switch cabinet

Abstract

An auxiliary device and method for replacing a current transformer of a high-voltage chamber switch cabinet mainly comprises a base, a height initial adjusting mechanism is installed on the base, a front-back adjusting mechanism is installed at the top end of the height initial adjusting mechanism, the front-back adjusting mechanism drives a left-right adjusting mechanism to move longitudinally, and the left-right adjusting mechanism drives a height fine adjusting mechanism and a jacking platform to move transversely. The height fine adjustment mechanism drives the jacking platform to move up and down, and the mutual inductor is arranged on the jacking platform. According to the auxiliary device and method for replacing the current transformer of the high-voltage chamber switch cabinet, the efficiency and safety of replacing the current transformer are improved.

Description

Technical Field

[0001] The invention relates to auxiliary equipment, in particular to auxiliary equipment and a method for replacing a current transformer in a high-voltage room switch cabinet. Background Art

[0002] According to statistics, most of the maintenance work in switch cabinets is related to current transformers (CTs), and due to the increase in loads in recent years, the original small-ratio CTs are no longer sufficient, so there is a lot of CT replacement work.

[0003] Traditionally, replacing current transformers in high-voltage room switchgear usually requires a lot of manpower and time. These current transformers play a vital role in power systems or industrial equipment, but there are some challenges and risks in the replacement process due to the narrow and difficult-to-access installation location. At present, the usual replacement method is through manual operation, which requires workers to enter the high-voltage room to operate, which not only poses safety risks, but also increases replacement time and cost. In addition, existing equipment and tools also have some limitations and shortcomings in the process of replacing current transformers. For example, commonly used mobile equipment may not be able to operate flexibly in a narrow space, and cannot provide sufficient stability and support, which may lead to difficulties or instability during the replacement process.

[0004] There are three problems in the installation of current transformers in high-voltage switch cabinets: 1) The space inside the switch cabinet is small, the current transformer is heavy, and manual installation is time-consuming, laborious and unsafe.

[0005] 2) The installation requires a large number of personnel, including 1-2 persons to support the current transformer, 1 person to install it, and 1 person to monitor it. At least 3-4 people are needed to work.

[0006] 3) From the location of the device, usually in a 10kV switch cabinet, the current transformer is widely placed in the middle of the switch cabinet, and its height is usually between 0.5 and 1.2 meters. These transformers are usually fixed vertically on the back plate of the switch cabinet. The weight of the current transformer in a 10kV switch cabinet is usually between 30 and 70Kg, so at this height, disassembling, installing or replacing the current transformer is a rather laborious task. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an auxiliary device and method for replacing a current transformer in a high-voltage room switch cabinet, thereby improving the efficiency and safety of replacing the current transformer.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: Auxiliary equipment for replacing current transformers in high-voltage room switch cabinets, including a base, an initial height adjustment mechanism is installed on the base, a front and rear adjustment mechanism is installed on the top of the initial height adjustment mechanism, the front and rear adjustment mechanism drives the left and right adjustment mechanism to move longitudinally, the left and right adjustment mechanism drives the height fine adjustment mechanism and the lifting platform to move horizontally, the height fine adjustment mechanism drives the lifting platform to move up and down, and the transformer is placed on the lifting platform.

[0009] The base includes a cross beam, which is arranged in two groups at intervals, and the two cross beams are connected into a whole through a mounting seat and a first connecting rod; a slide groove is opened on the opposite side of the two cross beams, and the two ends of the longitudinal beam are slidably matched with the slide groove through a slider; a slide rail is provided at the upper end of the longitudinal beam along the length direction, and a height fine adjustment mechanism is slidably matched with the slide rail.

[0010] The initial height adjustment mechanism is a plurality of retractable support legs, and the support legs are made of high-strength steel.

[0011] The front-to-back adjustment mechanism comprises a longitudinal truss fixed on the initial height adjustment mechanism, and a transverse truss is installed on the longitudinal truss and driven to move through a gear rack transmission mechanism.

[0012] The rack and pinion transmission mechanism includes two groups of racks which are arranged at intervals on the longitudinal truss, each rack meshing with the corresponding first gear, the two first gears being fixed to the first rotating shaft, and the first rotating shaft being installed on the transverse truss; slides are fixed on the left and right sides of the transverse truss at the first gears, and the bottom end of the slide slides in sliding cooperation with the side of the rack; the first gear meshes with the second gear on the slide, and the second gear is driven by the first motor.

[0013] The front and rear ends of the longitudinal truss are fixed with limiting blocks.

[0014] The left-right adjustment mechanism comprises a lead screw which is mounted on the transverse truss and driven to rotate by a second motor; the two ends of the movable box body are slidably matched with the transverse truss and the middle is threadedly connected with the lead screw.

[0015] The height fine adjustment mechanism comprises a hydraulic jack, the output end of the hydraulic jack is fixedly connected to the support rod, and the upper end of the support rod passes through the moving box on the transverse truss and is fixedly connected to the jacking platform.

[0016] Visual positioning sensors are arranged around the upper end of the jacking platform.

[0017] The method for replacing a current transformer in a high voltage room switch cabinet comprises the following steps: A method for replacing a current transformer in a high-voltage room switch cabinet comprises the following steps: S1: Preparation S1.1: In the initial state, the height initial adjustment mechanism remains fixed after adjusting the height. The height initial adjustment mechanism is adjusted according to the actual installation height of the transformer, and the installation height of the entire device is adjusted to 55%-75% of the actual installation height of the transformer; S1.2: The operator places the device under the switch cabinet in a safe and stable manner through the grippers on the second connecting rods at both ends; S1.3: Start the control system and perform initialization and calibration; S2: Target position determination S2.1: Determine the target location for transformer installation according to installation requirements, and input the corresponding installation coordinate information into the control system; S2.2: The control system performs path planning to plan the moving path of the jacking platform to ensure that the transformer carried by the jacking platform can smoothly reach the target position; S3: Transformer Installation S3.1: Movement and positioning of the lifting platform; start the main power switch of the device, and prepare the front and rear adjustment mechanisms and the left and right adjustment mechanisms to operate, so that the transformer moves horizontally or vertically along the predetermined path with the lifting platform, gradually approaching the target position; at the same time, the control system sets a safety threshold during the path planning process to avoid collision with other equipment in the high-voltage cabinet; S3.2: The movement state of the mutual inductor is monitored in real time by the visual positioning sensor, and the control system adjusts the speed and direction of the first motor and the second motor to gradually move the mutual inductor to just below the target position and ensure that it is aligned with the installation position on the horizontal projection plane; In S3.1, the transformer moves laterally or longitudinally along a predetermined path along with the lifting platform, specifically including: S3.1.1: Horizontal movement: The second motor on the left is started, and the second motor drives the lead screw to rotate, so that the moving box moves left and right in the horizontal truss, thereby causing the jacking platform, height fine adjustment mechanism and longitudinal beam to move horizontally; S3.1.2: Longitudinal movement: The first motor on the right side is started, and the first gear is driven to rotate through the second gear, so that the two first gears rotate synchronously along the rack, thereby driving the transverse truss to move longitudinally along the length direction of the rack, thereby causing the jacking platform and the height fine adjustment mechanism to move longitudinally; S4: The lifting platform is lifted into place S4.1: When the lifting platform moves the transformer to the position directly below the installation location, the height fine adjustment mechanism is ready to start; S4.2: The hydraulic jack extends to lift the jacking platform carrying the transformer until it is aligned with the predetermined bolt hole height. The hydraulic jack stops to maintain pressure and locks the transformer position. S5: After the transformer is completely installed in the target position, the installation process is checked, tested and verified to ensure that the transformer is installed firmly and meets the requirements; S6: Cleaning and finishing; S7: Records and reports.

[0018] The present invention provides an auxiliary device and method for replacing a current transformer in a high-voltage room switch cabinet, which has the following technical effects: 1) Improve efficiency: The front and rear adjustment mechanism, left and right adjustment mechanism and height fine adjustment mechanism are used to move the current transformer, and the positioning control system is used for position monitoring. The current transformer can be moved to the specified position quickly and accurately, thereby improving the efficiency of the replacement process and saving time and labor costs.

[0019] 2) Improve safety: Compared with manual installation, this device can effectively avoid the previous method of holding the current transformer by hand during the installation process. Especially in a small space, the human body has no fulcrum and the risk of the current transformer falling is high. This device effectively solves this problem. In addition, this device is equipped with a visual positioning sensor to avoid collision with other equipment in the high-voltage cabinet during movement, ensuring the safety of operators and equipment.

[0020] 3) Strong flexibility and applicability: The initial height adjustment mechanism can provide stable support and, through initial adjustment, can be applied to high-voltage room switch cabinets of various types and sizes, with strong applicability and flexibility.

[0021] 4) Reduce labor costs: Traditional replacement methods usually require a lot of manpower input, while the use of this device can reduce labor costs, improve work efficiency, and reduce maintenance and repair costs.

[0022] 5) Easy operation: The device is equipped with an operating table and an intelligent positioning control system. The operation is easy and intuitive. Operators only need simple training to master the operating skills, which reduces the training cost and time of operators.

[0023] 6) Enhanced accuracy and stability: This device has good stability and precise positioning function, which can ensure the accuracy and stability during the replacement process and avoid damage and errors caused by improper operation.

[0024] 7) By setting up two sets of racks and two sets of gears and driving them with one motor, stability and accuracy can be improved without increasing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1It is a schematic diagram of the installation structure of the present invention (the height fine adjustment mechanism is connected to the base).

[0026] Figure 2 It is a structural schematic diagram of the lower half of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the upper half of the present invention.

[0028] Figure 4 It is a schematic diagram of the installation structure of the present invention (the height fine adjustment mechanism is not connected to the base).

[0029] In the figure: base 1, initial height adjustment mechanism 2, front and rear adjustment mechanism 3, left and right adjustment mechanism 4, height fine adjustment mechanism 5, jacking platform 6, cross beam 1.1, mounting seat 1.2, first connecting rod 1.3, slide groove 1.4, longitudinal beam 1.5, slide rail 1.6, longitudinal truss 3.1, second connecting rod 3.2, rack 3.3, first gear 3.4, first rotating shaft 3.5, transverse truss 3.6, slide seat 3.7, second gear 3.8, first motor 3.9, screw 4.1, second motor 4.2, mobile box 4.3, hydraulic jack 5.1, support rod 5.2, visual positioning sensor 6.1. DETAILED DESCRIPTION

[0030] like Figure 1 As shown, an auxiliary device for replacing current transformers in high-voltage room switch cabinets has dimensions of 30 cm (length) * 60 cm (width) * 52 cm (height), and the overall size of the device is suitable for operation in the cabinet. The device includes a base 1, on which a height initial adjustment mechanism 2 is installed, and a front-to-back adjustment mechanism 3 is installed on the top of the height initial adjustment mechanism 2. The front-to-back adjustment mechanism 3 is provided with a left-to-right adjustment mechanism 4, and a jacking platform 6 is installed on the top of the left-to-right adjustment mechanism 4. The jacking platform 6 is adjusted by a height fine adjustment mechanism 5 on the base.

[0031] like Figure 2 As shown, the base 1 includes a crossbeam 1.1, which is arranged in two groups in parallel front and back, and the upper ends of the two crossbeams 1.1 are connected to the first connecting rod 1.3 through a mounting seat 1.2 to form a whole. The sides of the two crossbeams 1.1 on the opposite side are provided with a slide groove 1.4, and the longitudinal beam 1.5 is slidably arranged in the slide groove 1.4 through a slider. The longitudinal beam 1.5 can move left and right along the length direction of the crossbeam 1.1. The upper end of the longitudinal beam 1.5 is provided with a slide rail 1.6 along the length direction, and the height fine adjustment mechanism 5 is slidably matched with the slide rail 1.6. In this way, the height fine adjustment mechanism 5 can move forward and backward and left and right relative to the base 1.

[0032] Or, if Figure 4As shown, the base 1 includes beams 1.1, which are arranged in two groups in parallel, and the upper ends of the two beams 1.1 are connected to the first connecting rod 1.3 through the mounting seat 1.2 to form a whole. The height fine adjustment mechanism 5 is located between the two beams 1.1, has no connection with the base 1, and can move freely.

[0033] The height initial adjustment mechanism 2 is a plurality of retractable support legs, which are connected as a whole by threaded connection of multiple support rods or other methods. Different specifications of support leg structures are set according to the installation positions of transformers at different heights to ensure matching with the installation positions of transformers at corresponding heights. The height initial adjustment mechanism 2 is made of high-strength steel to ensure stable support.

[0034] like Figure 3 As shown, the front-rear adjustment mechanism 3 includes a longitudinal truss 3.1, and the front and rear ends of the two longitudinal trusses 3.1 are connected as a whole through a second connecting rod 3.2. A rack 3.3 is fixed on the upper surface of the longitudinal truss 3.1 along the length direction, and each rack 3.3 is meshed with a corresponding first gear 3.4. The two first gears 3.4 are fixed to a first rotating shaft 3.5, and the first rotating shaft 3.5 is rotatably mounted on a transverse truss 3.6 through a bearing. A slide 3.7 is fixed on the left and right sides of the transverse truss 3.6 at the first gear 3.4. The lower opening of the slide 3.7 allows the rack 3.3 to pass freely. The bottom of the slide 3.7 is slidably matched with the lower end of the rack 3.3 and limited. The upper end of the slide 3.7 is installed with a second gear 3.8, which is meshed with the first gear 3.4 and driven to rotate by the first motor 3.9.

[0035] When the first motor 3.9 is started, the second gear 3.8 drives the two left and right first gears 3.4 to rotate, and the two first gears 3.4 move along the length direction of the rack 3.3, so that the transverse truss 3.5 can be driven to move synchronously, and the transverse truss 3.5 is guided and limited by the slide seat 3.7 at the same time.

[0036] Preferably, the longitudinal truss 3.1 is fixed with limit blocks 3.10 at the front and rear ends, and the limit blocks 3.10 prevent the transverse truss 3.5 from exceeding the movement limit.

[0037] Preferably, a gripper 3.11 is fixed on the second connecting rod 3.2. The two grippers are provided to facilitate the operation and maintenance personnel to carry the entire device to the lower part of the transformer switch cabinet.

[0038] like Figure 3 As shown, the left-right adjustment mechanism 4 includes a lead screw 4.1, which is rotatably mounted on the transverse truss 3.5 through a bearing assembly, and the lead screw 4.1 is driven to rotate by a second motor 4.2. The two ends of the moving box 4.3 are slidably matched with the transverse truss 3.5, and the middle is threadedly connected to the lead screw 4.1. When the second motor 4.2 drives the lead screw 4.1 to rotate, the moving box 4.3 moves along the length direction of the lead screw 4.1.

[0039] like Figure 2 As shown, the height fine adjustment mechanism 5 includes a hydraulic jack 5.1 (hydraulic jack), and the output end of the hydraulic jack 5.1 is fixedly connected to a support rod 5.2. The upper end of the support rod 5.2 passes through the mobile box 4.3 on the transverse truss 3.5 and is fixedly connected to the jacking platform 6. The support rod 5.2 is staggered with the lead screw 4.1 and the first rotating shaft 3.5 to avoid interference.

[0040] Or, if Figure 4 As shown, the hydraulic jack 5.1 is fixedly connected to the support rod 5.2 through the connecting flange. The connecting flange is convenient for connection and can also increase the contact area, making the jacking more stable. The support rod 5.2 passes through the mobile box 4.3 and is fixedly connected to the jacking platform 6. Under normal circumstances, the jacking platform 6 is supported by the mobile box 4.3.

[0041] Since the hydraulic lifter 5.1 has no contact with the base 1 in this structure, when the device is placed in the cabinet, the hydraulic lifter 5.1 can contact the bottom surface of the cabinet after being extended and retracted.

[0042] The upper end of the lifting platform 6 is provided with visual positioning sensors 6.1 around it, and the visual positioning sensors 6.1 ensure that the lifting platform can accurately align with the installation position of the current transformer.

[0043] The visual positioning sensor 6.1 adopts KEYENCE IV4-400CA visual positioning recognition sensor, which has both camera and positioning recognition functions, easy installation, small size and accurate recognition.

[0044] In addition, the device is equipped with a control system, which has operation buttons, a display screen, etc.

[0045] The operator monitors the real-time status of the mutual inductor obtained by the visual positioning sensor 6.1 through the display screen. The control system interacts with the visual positioning sensor 6.1, and the visual positioning sensor 6.1 transmits the actual installation position of the mutual inductor to the control system in real time. The control system generates a corresponding control signal by comparing the deviation between the predetermined installation position and the actual position. The generated control signal is transmitted to the first motor 3.9, the second motor 4.2 and the hydraulic jack 5.1 through the output interface of the control system. The control signals received by these motors and jacks adjust the motion parameters such as speed, torque and position through precise drive circuits and feedback mechanisms. Then the first motor 3.9 and the second motor 4.2 are responsible for the lateral and longitudinal movement of the mutual inductor respectively, and high-precision movement is ensured by the servo control system. The hydraulic jack 5.1 adjusts the height of the mutual inductor according to the control signal. The whole process is monitored and adjusted in real time by the closed-loop control system to ensure that the final position of the mutual inductor is accurately aligned with the predetermined installation position.

[0046] The control system operation process is as follows: 1) Initialization and calibration: At startup, the control system is first initialized to ensure that each mechanism is in a reset state. The sensor is calibrated to ensure its accuracy and stability.

[0047] 2) Path planning: According to the target position and installation requirements of the transformer, the control system determines the moving path of the device along x, y, and z through a path planning algorithm.

[0048] 3) Motion control: The controller controls the first motor, the second motor and the hydraulic jack to achieve the movement and positioning of the jacking platform. A closed-loop control algorithm is used to adjust the speed and direction of the first motor, the second motor and the hydraulic jack in real time to achieve precise positioning requirements.

[0049] 4) Positioning control system: The operator monitors the relative position between the actual position of the transformer and the target installation position in real time through the display screen. According to the sensor data and the preset target, the position and posture of the jacking platform are adjusted to ensure that the transformer is accurately moved to the bottom of the target installation position.

[0050] 5) Hydraulic lifting control: According to the predetermined bolt hole position of the transformer, the action of the hydraulic jack is controlled to adjust the installation height of the transformer. Through the feedback information of the visual sensor, the precise control of the jacking position is achieved to ensure the stability and balance of the transformer installation.

[0051] 6) Safety monitoring: The control system continuously monitors the safety status of the transformer during movement through the visual positioning sensor 6.1 to avoid collision with other equipment in the high-voltage cabinet. The safety threshold is set. Once an abnormal situation is detected, the movement is stopped immediately and an alarm is issued to ensure the safety of personnel and equipment.

[0052] 7) Task completion and feedback: When the transformer is installed, the control system generates an installation report and provides feedback to the operator on the task completion status. Data and feedback information from the installation process are collected for subsequent performance optimization and system improvement.

[0053] A method for replacing a current transformer in a high-voltage room switch cabinet comprises the following steps: S1: Preparation; S1.1: In general, the height initial adjustment mechanism 2 remains fixed after the height is adjusted. The height initial adjustment mechanism 2 is adjusted according to the actual installation height of the transformer, and the installation height of the entire device is adjusted to 65% of the actual installation height of the transformer.

[0054] S1.2: The operator places the device in a safe and stable working area (below the inside of the switch cabinet) through the grippers 3.11 on the second connecting rods 3.2 at both ends.

[0055] S1.3: Start the control system and perform initialization and calibration.

[0056] S2: Target location determination; S2.1: Determine the target location for transformer installation according to installation requirements and input the corresponding installation coordinate information into the control system.

[0057] S2.2: The controller performs path planning to plan the moving path of the jacking platform 6 to ensure that the mutual inductor carried by the jacking platform 6 can smoothly reach the target position.

[0058] S3: Transformer installation; S3.1: Movement and positioning of the lifting platform 6; start the main power switch of the equipment, and prepare the front and rear adjustment mechanism 3 and the left and right adjustment mechanism 4 to operate, so that the mutual inductor moves horizontally or vertically along the predetermined path with the lifting platform 6, gradually approaching the target position. At the same time, the control system sets a safety threshold during the path planning process to avoid collision with other equipment in the high-voltage cabinet.

[0059] S3.2: The movement status of the mutual inductor is monitored in real time by the visual positioning sensor, and the controller adjusts the speed and direction of the first motor and the second motor to gradually move the mutual inductor to just below the target position and ensure that it is aligned with the installation position on the horizontal projection plane.

[0060] In S3.1, the mutual inductor moves laterally or longitudinally along a predetermined path along with the lifting platform 6, specifically including: S3.1.1: lateral movement; the second motor 4.2 on the left side is started, and the second motor 4.2 drives the lead screw 4.1 to rotate, and the moving box 4.3 moves left and right in the transverse truss 3.6, thereby causing the jacking platform 6, the height fine adjustment mechanism 5 and the longitudinal beam 1.5 to move laterally.

[0061] S3.1.2: longitudinal movement; the first motor 3.9 on the right side is started, and the first gear 3.4 is driven to rotate through the second gear 3.8, so that the two first gears 3.4 rotate synchronously along the rack 3.3, and then drive the transverse truss 3.6 to move longitudinally along the length direction of the rack 3.3, thereby causing the jacking platform 6 and the height fine adjustment mechanism 5 to move longitudinally.

[0062] S4: The lifting platform is lifted into place; S4.1: When the lifting platform 6 moves the transformer to the position just below the installation position, the height fine adjustment mechanism 5 is ready to start.

[0063] S4.2: The hydraulic jack 5.1 extends to lift the jacking platform 6 carrying the transformer until it is aligned with the predetermined bolt hole height. The hydraulic jack 5.1 stops to maintain pressure and locks the transformer position.

[0064] S5: Installation completed and tested; S5.1: When the transformer is completely installed at the target position, the hydraulic jack 5.1 continues to stop and maintain pressure to lock the transformer position.

[0065] S5.2: Check the installation process and perform necessary tests and verifications to ensure that the transformer is installed securely and meets the requirements.

[0066] S6: Cleaning and finishing; S6.1: Shut down power systems and control systems to ensure safe operation. S6.1: Clean up the work area, remove debris and tools, and restore the site to a clean and tidy state.

[0067] S7: Records and reports; S7.1: Record key data and operating steps during the installation of the transformer. S7.2: Generate an installation report, including installation location, installation time, installer and other information, and keep it on file for future reference.

Claims

1. Auxiliary equipment for replacing current transformers in high-voltage room switch cabinets, characterized by: The invention comprises a base (1), a height initial adjustment mechanism (2) is installed on the base (1), a front-rear adjustment mechanism (3) is installed on the top of the height initial adjustment mechanism (2), the front-rear adjustment mechanism (3) drives the left-right adjustment mechanism (4) to move longitudinally, the left-right adjustment mechanism (4) drives the height fine adjustment mechanism (5) and the lifting platform (6) to move laterally, the height fine adjustment mechanism (5) drives the lifting platform (6) to move up and down, and the mutual inductor is placed on the lifting platform (6).

2. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 1 is characterized in that: The base (1) comprises a crossbeam (1.1), the crossbeams (1.1) are arranged in two groups at intervals, and the two crossbeams (1.1) are connected to form a whole through a mounting seat (1.2) and a first connecting rod (1.3); a slide groove (1.4) is provided on opposite sides of the two crossbeams (1.1), and two ends of the longitudinal beam (1.5) are slidably matched with the slide groove (1.4) through a slider; a slide rail (1.6) is provided at the upper end of the longitudinal beam (1.5) along the length direction, and a height fine adjustment mechanism (5) is slidably matched with the slide rail (1.6).

3. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 2 is characterized in that: The initial height adjustment mechanism (2) is a plurality of retractable support legs, and the support legs are made of high-strength steel.

4. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 3 is characterized in that: The front-rear adjustment mechanism (3) comprises a longitudinal truss (3.1) fixed on the initial height adjustment mechanism (2), and a transverse truss (3.6) mounted on the longitudinal truss (3.1) and driven to move via a rack and pinion transmission mechanism.

5. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 4 is characterized in that: The rack and pinion transmission mechanism comprises racks (3.3), the racks (3.3) being two groups and arranged at intervals on the longitudinal truss (3.1), each rack (3.3) being meshed with a corresponding first gear (3.4), the two first gears (3.4) being fixed to a first rotating shaft (3.5), and the first rotating shaft (3.5) being mounted on a transverse truss (3.6); a slide seat (3.7) being fixed at the first gear (3.4) on the left and right sides of the transverse truss (3.6), the bottom end of the slide seat (3.7) being slidably matched with the side surface of the rack (3.3); the first gear (3.4) being meshed with a second gear (3.8) on the slide seat (3.7), and the second gear (3.8) being driven by a first motor (3.9).

6. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 5 is characterized in that: Limiting blocks (3.10) are fixed at the front and rear ends of the longitudinal truss (3.1).

7. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 6 is characterized in that: The left-right adjustment mechanism (4) comprises a lead screw (4.1), which is mounted on the transverse truss (3.5) and driven to rotate by a second motor (4.2); the two ends of the movable box (4.3) are slidably matched with the transverse truss (3.5), and the middle is threadedly connected to the lead screw (4.1).

8. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 7 is characterized in that: The height fine adjustment mechanism (5) comprises a hydraulic jack (5.1), the output end of the hydraulic jack (5.1) is fixedly connected to a support rod (5.2), and the upper end of the support rod (5.2) passes through a movable box (4.3) on a transverse truss (3.5) and is fixedly connected to a jacking platform (6).

9. The auxiliary device for replacing current transformers in high-voltage room switch cabinets according to claim 8 is characterized in that: Visual positioning sensors (6.1) are arranged around the upper end of the jacking platform (6).

10. A method for replacing a current transformer in a high-voltage switch cabinet, wherein the method adopts the auxiliary device for replacing a current transformer in a high-voltage switch cabinet according to claim 9, and comprises the following steps: S1: Preparation S1.1: In the initial state, the height initial adjustment mechanism (2) remains fixed after adjusting the height. The height initial adjustment mechanism (2) is adjusted according to the actual installation height of the transformer, and the installation height of the entire device is adjusted to 55%-75% of the actual installation height of the transformer; S1.2: The operator places the device at the bottom of the switch cabinet in a safe and stable manner using the grippers (3.11) on the second connecting rods (3.2) at both ends; S1.3: Start the control system and perform initialization and calibration; S2: Target position determination S2.1: Determine the target location for transformer installation according to installation requirements, and input the corresponding installation coordinate information into the control system; S2.2: The control system performs path planning to plan the moving path of the jacking platform (6) to ensure that the mutual inductor carried by the jacking platform (6) can smoothly reach the target position; S3: Transformer Installation S3.1: movement and positioning of the lifting platform (6); starting the main power switch of the device, preparing the front and rear adjustment mechanism (3) and the left and right adjustment mechanism (4) to operate, so that the transformer moves along the lifting platform (6) in the horizontal or vertical direction along a predetermined path, gradually approaching the target position; at the same time, the control system sets a safety threshold during the path planning process to avoid collision with other equipment in the high-voltage cabinet; S3.2: The movement state of the mutual inductor is monitored in real time by the visual positioning sensor (6.1), and the control system adjusts the speed and direction of the first motor (3.9) and the second motor (4.2) to gradually move the mutual inductor to the position directly below the target position and ensure that it is aligned with the installation position on the horizontal projection plane; In S3.1, the mutual inductor moves laterally or longitudinally along a predetermined path along with the lifting platform (6), specifically including: S3.1.1: lateral movement; the second motor (4.2) on the left side is started, and the second motor (4.2) drives the lead screw (4.1) to rotate, so that the moving box (4.3) moves left and right in the transverse truss (3.6), thereby causing the jacking platform (6), the height fine adjustment mechanism (5) and the longitudinal beam (1.5) to move laterally; S3.1.2: longitudinal movement; the first motor (3.9) on the right side is started, and the first gear (3.4) is driven to rotate through the second gear (3.8), so that the two first gears (3.4) rotate synchronously along the rack (3.3), thereby driving the transverse truss (3.6) to move longitudinally along the length direction of the rack (3.3), thereby causing the jacking platform (6) and the height fine adjustment mechanism (5) to move longitudinally; S4: The lifting platform is lifted into place S4.1: When the lifting platform (6) moves the transformer to the position directly below the installation location, the height fine adjustment mechanism (5) is ready to start; S4.2: The hydraulic jack (5.1) extends to lift the jacking platform (6) carrying the transformer until it is aligned with the predetermined bolt hole height, and the hydraulic jack (5.1) stops to maintain pressure and locks the transformer position; S5: After the transformer is completely installed in the target position, the installation process is checked, tested and verified to ensure that the transformer is installed firmly and meets the requirements; S6: Cleaning and finishing; S7: Records and reports.

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