Device and method for automatically and uniformly spraying RTV coating on transformer for transformer substation

Abstract

The invention relates to a device and a method for automatically and uniformly spraying RTV coating on a transformer for a transformer substation, and belongs to the technical field of power equipment maintenance. According to the technical scheme, an electric rotating workbench is arranged in the middle of a carrying platform, a Z-axis fixing frame is arranged beside the electric rotating workbench, a Z-axis lifting mechanism is arranged on the Z-axis fixing frame, an X-axis moving mechanism is arranged on the Z-axis lifting mechanism, a spraying gun grabbing buckle is arranged at the front end of the X-axis moving mechanism, and a spraying gun of a spraying system is arranged on the spraying gun grabbing buckle; the Z-axis lifting mechanism, the X-axis moving mechanism and the electric rotating workbench are automatically controlled through the electrical control system, and the RTV coating of the mutual inductor on the electric rotating workbench is evenly sprayed in cooperation with the spraying gun. The RTV coating is uniformly sprayed on the outer surfaces of the insulators of the current transformer and the voltage transformer, and the RTV coating is uniformly sprayed on the surfaces of the umbrella skirts of any insulators with different sizes, so that the antifouling grade of the transformers is improved, and the power supply reliability is improved.

Description

Technical Field

[0001] This invention relates to an apparatus and method for automatically and uniformly spraying RTV coating onto instrument transformers used in substations, belonging to the field of power equipment maintenance technology. Background Technology

[0002] Room temperature vulcanizing (RTV) silicone rubber coatings are widely used in power systems due to their excellent insulation, water repellency, and weather resistance. During substation equipment maintenance, newly replaced voltage transformers, current transformers, and other coil-type equipment require RTV coating. Currently, RTV coating of external insulators for outdoor current transformers and voltage transformers in substations is mainly achieved manually by workers using spraying (brushing). This method is time-consuming, produces poor coating quality, affects power supply time, and is prone to coating buildup, defects, and other issues, leading to compromised coating quality and potential safety hazards.

[0003] To address the aforementioned technical problems, Chinese patent application ZLCN202021843411.4 discloses "An Automatic RTV Spraying Device." When using this automatic RTV spraying device, firstly, the device is placed stably on the ground using a support plate. The operator can control the lifting and lowering of the hydraulic system via a central processing module. The lifting and lowering of the hydraulic system drives the connecting parts to rise and fall. When spraying is required, the lifting and lowering of the hydraulic system causes the connecting parts to lift the sliding parts. The rising of the sliding parts causes the fixing parts and the spray gun to rise, allowing the spray gun to spray the insulators at a higher position. The operator can start the motor via the central processing module, causing the motor to rotate and drive the rotating parts... The rod rotates, driving the geared universal wheel to rotate as well. The universal wheel meshes with the gear block, allowing the sliding component to slide along the connecting component via a groove. This allows the sliding component to rotate the spray gun, ensuring coating is applied all around the insulator. A motor drives the spraying to ensure even coverage. When the RTV coating tank is fully coated, the central processing module controls the hydraulic system to lower it. The threaded connection between the RTV coating tank and the spray gun allows for easy coating replacement. The hydraulic system and sliding component replace manual spraying; workers only need to control the central processing module, the hydraulic system, the motor, and the spray gun to complete the coating process. However, this technology is not suitable for automatically spraying RTV coating onto transformers in substations. The spray gun head cannot rotate, making it difficult to spray the lower part of the insulator skirts. Manual control of the raising and lowering is required, introducing subjectivity and making it impossible to monitor coating thickness uniformity, resulting in poor coating thickness stability. Summary of the Invention

[0004] This invention proposes an apparatus and method for automatically and uniformly spraying RTV coating onto the outer surface of insulators of current transformers and voltage transformers. This allows for uniform spraying of RTV coating onto the surface of insulator skirts of any size, thereby improving the anti-pollution level of the transformers and enhancing power supply reliability. Simultaneously, it reduces the spraying time for maintenance personnel, improves maintenance efficiency, and solves the aforementioned technical problems existing in existing technologies.

[0005] The technical solution of this invention is: An automatic and uniform spraying device for RTV coating on transformers used in substations includes a transport platform, an X-axis moving mechanism, a Z-axis lifting mechanism, an electric rotary table, a spraying system, and an electrical control system. The spraying system and electrical control system are installed on the transport platform. An electric rotary table is located in the middle of the transport platform, and a Z-axis fixing frame is located next to the electric rotary table. A Z-axis lifting mechanism is installed on the Z-axis fixing frame, and an X-axis moving mechanism is installed on the Z-axis lifting mechanism. A spray gun gripper is located at the front end of the X-axis moving mechanism, and a spray gun of the spraying system is installed on the spray gun gripper. The electrical control system automatically controls the Z-axis lifting mechanism, the X-axis moving mechanism, and the electric rotary table, and works with the spray gun to uniformly spray RTV coating onto the transformer transformers on the electric rotary table.

[0006] Furthermore, the electric rotary worktable includes a turntable, a rotary support, a transmission gear, a reducer, and a servo motor. The rotary support is a ring rack fixed below the turntable. The ring rack of the rotary support meshes with the transmission gear. The transmission gear is connected to the output shaft of the servo motor through the reducer. The servo motor drives the turntable to rotate through the transmission gear and the rotary support. The turntable has multiple positioning holes that match the anchor bolts of the current transformers to be coated, thus fixing the current transformers to be coated onto the turntable.

[0007] Furthermore, the surface of the rotary table is painted, making it corrosion-resistant and easy to clean; the positioning holes on the rotary table surface are matched with fixing clamps for substation transformers of different specifications to ensure that the substation transformers are firmly fixed; the rotary table is equipped with a rotation angle encoder to provide real-time feedback on the rotation position of the rotary table and ensure the positioning accuracy of the painting.

[0008] Furthermore, the rotary table, rotary support, and transmission gear are located above the transport platform. The reducer and servo motor are installed below the transport platform, passing through the transport platform and connected to the transmission gear, driving the rotary table to rotate and causing the substation instrument transformer to rotate around the vertical axis, so that the substation instrument transformer is evenly stressed in the circumferential direction, achieving spraying without dead angles; by adjusting the rotation speed of the rotary table, it can be adapted to different spraying process requirements.

[0009] Furthermore, the X-axis moving mechanism includes a servo motor, a linear guide rail, and a slider. The linear guide rail is horizontally mounted on the Z-axis lifting mechanism. The slider slides along the linear guide rail. The slider is connected to the output shaft of the servo motor via a lead screw. The servo motor drives the slider to move horizontally along the linear guide rail. A spray gun gripper is provided on the slider, which secures the spray gun of the spraying system to the slider. The spray gun on the gripper faces the substation transformer. The X-axis moving mechanism adjusts the relative horizontal position of the spray gun and the substation transformer to ensure full horizontal coverage of the substation transformer.

[0010] Furthermore, the linear guide rail is a high-precision linear guide rail, equipped with a travel limit switch, combining hard and soft limits to prevent the slider from running over the limit; the X-axis moving mechanism is equipped with a dust cover to prevent dust from affecting the transmission accuracy.

[0011] Furthermore, the Z-axis lifting mechanism includes a second servo motor, a second linear guide rail, a second slider, and a Z-axis fixed seat. The Z-axis fixed seat is a U-shaped long groove with its back fixed to the Z-axis fixed frame. The second linear guide rail is fixed inside the U-shaped long groove of the Z-axis fixed seat. The second slider slides and the second linear guide rail. The first linear guide rail of the X-axis moving mechanism is fixed on the second slider. The second slider is connected to the output shaft of the second servo motor through a lead screw structure. The second servo motor drives the second slider to move up and down along the vertically arranged second linear guide rail, adjusting the height of the X-axis moving mechanism to adapt to the spraying requirements of transformers for substations of different heights, and controlling the spraying range and distance of the spray gun in the vertical direction.

[0012] Furthermore, the Z-axis lifting mechanism is equipped with a known electromagnetic brake to prevent the slider from accidentally falling in the event of a power outage or malfunction.

[0013] Furthermore, the spraying system is a known and commonly used device in the art, comprising a paint storage tank, a high-pressure delivery pump, a spray gun, an atomizer, and a paint filter. It can automatically deliver and atomize the paint, precisely spraying it onto the surface of the substation transformer to achieve uniform coating. The spraying pressure, flow rate, and atomization effect are adjustable to adapt to different paints and the requirements of the substation transformer. The spray gun is fixed to the slider by a spray gun gripper, which is a known and commonly used locking mechanism.

[0014] Furthermore, the transport platform includes longitudinal beams, casters, crossbeams, a support plate, feet, and a panel. The longitudinal beams and crossbeams are welded together to form a frame, on which the panel is mounted. Casters and feet are installed at the bottom. During transportation, the feet rotate up, and upon arrival at the designated position, they rotate down to provide support and stability. The panel has a support plate for mounting the spraying system.

[0015] A method for automatically and uniformly spraying RTV coating onto a substation instrument transformer, using the aforementioned device, includes the following steps: fixing the substation instrument transformer to be coated on an electric rotary table; adjusting the X-axis moving mechanism and the Z-axis lifting mechanism to match the spray gun on the X-axis moving mechanism with the part of the substation instrument transformer to be coated; controlling the rotation of the electric rotary table through an electrical control system, while simultaneously controlling the spraying system and the spray gun to spray RTV coating onto the substation instrument transformer; and removing the substation instrument transformer after the coating has dried.

[0016] Furthermore, the electrical control system 3 controls the rotary table 101 of the electric rotary workbench 1 to rotate in both directions around the circumference. The rotational position of the workbench is fed back in real time through the equipped rotation angle encoder to ensure the spraying positioning accuracy. The current transformer is sprayed in a circumferential manner relative to the spray gun. After each spraying circle, the spray gun moves downward once according to the width of the spraying fan and continues spraying. After the first spraying of the current transformer insulator is completed, another spraying is carried out until the coating layer on the surface of the current transformer insulator meets the technical requirements.

[0017] Furthermore, the spraying system 8 is equipped with a solenoid valve to control the spraying of gas and paint. The solenoid valve is connected to the electrical control system 3 via a cable, automatically controlling the gas pressure and paint flow rate. A PLC controller controls the up-and-down and back-and-forth movement of the spray gun, coordinating with the rotation of the substation's instrument transformer to achieve precise positioning and automated spraying of the instrument transformer. It can adapt to instrument transformer insulators of different shapes and sizes, enabling automatic spraying.

[0018] The beneficial technical effects of this invention are: to achieve uniform spraying of RTV coating on the outer surface of insulators of current transformers and voltage transformers, and to achieve uniform spraying of RTV coating on the surface of insulator skirts of any size, thereby improving the anti-pollution level of the transformers and improving power supply reliability; at the same time, it reduces the spraying time for maintenance personnel and improves maintenance efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the electric rotary table according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the Z-axis lifting mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the X-axis moving mechanism according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the transport platform structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the electrical control principle of an embodiment of the present invention; Figure 7 This is a schematic diagram of an embodiment of the present invention; In the diagram: 1. Electric rotary table; 2. Transport platform; 3. Electrical control system; 4. X-axis moving mechanism; 5. Spray gun gripper; 6. Z-axis lifting mechanism; 7. Z-axis fixing frame; 8. Spraying system; 101. Turntable; 102. Rotary support; 103. Transmission gear; 104. Reducer; 105. Servo motor 1; 106. Positioning hole; 601. Servo motor 2; 602. Linear guide rail 2; 603. Slider 2; 604. Z-axis fixing seat; 401. Servo motor 3; 402. Linear guide rail 1; 403. Slider 1; 201. Longitudinal beam; 202. Caster wheel; 203. Crossbeam; 204. Support plate; 205. Foot; 206. Panel; 11. Step-down module 1; 12. Step-down module 2; 13. PLC controller; 14. Touch screen; 15. Motor drive 1; 16. Motor drive 2; 17. Motor drive 3. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] See attached document Figure 1-6 A device for automatically and uniformly spraying RTV coating onto instrument transformers used in substations includes a transport platform 2, an X-axis moving mechanism 4, a Z-axis lifting mechanism 6, an electric rotary table 1, a spraying system 8, and an electrical control system 3. The transport platform 2 is equipped with the spraying system 8 and the electrical control system 3. The electric rotary table 1 is located in the middle of the transport platform 2. A Z-axis fixing frame 7 is located next to the electric rotary table 1. The Z-axis fixing frame 7 is equipped with the Z-axis lifting mechanism 6. The Z-axis lifting mechanism 6 is equipped with the X-axis moving mechanism 4. A spray gun gripper 5 is located at the front end of the X-axis moving mechanism 4. The spray gun of the spraying system 8 is located on the spray gun gripper 5. The electrical control system 3 automatically controls the Z-axis lifting mechanism 6, the X-axis moving mechanism 4, and the electric rotary table 1 to complete the uniform spraying of RTV coating onto the instrument transformers on the electric rotary table 1 in conjunction with the spray gun.

[0022] See attached document Figure 2 The electric rotary worktable 1 includes a rotary disk 101, a rotary support 102, a transmission gear 103, a reducer 104, and a servo motor 105. The rotary support 102 is a ring rack, fixed below the rotary disk 101. The ring rack of the rotary support 102 meshes with the transmission gear 103. The transmission gear 103 is connected to the output shaft of the servo motor 105 through the reducer 104. The servo motor 105 drives the rotary disk 101 to rotate through the transmission gear 103 and the rotary support 102. The rotary disk 101 has multiple positioning holes 106 that match the anchor bolts of the current transformers to be sprayed, thus fixing the current transformers to be sprayed on the rotary disk 101.

[0023] The surface of the rotary table 101 is painted, making it corrosion-resistant and easy to clean. The positioning holes 106 on the surface of the rotary table 101 are matched with fixing clamps for substation transformers of different specifications to ensure that the substation transformers are firmly fixed. The rotary table 101 is equipped with a rotation angle encoder to provide real-time feedback on the rotation position of the rotary table 101 and ensure the positioning accuracy of the painting.

[0024] The rotary table 101, rotary support 102, and transmission gear 103 are located above the transport platform 2. The reducer 104 and servo motor 105 are installed below the transport platform 2, passing through the transport platform 2 and connected to the transmission gear 103, driving the rotary table 101 to rotate, which in turn drives the substation instrument transformer to rotate around the vertical axis, so that the substation instrument transformer is evenly stressed in the circumferential direction, achieving spraying without dead angles; by adjusting the rotation speed of the rotary table 101, it can be adapted to different spraying process requirements.

[0025] See attached document Figure 4 The X-axis moving mechanism 4 includes a servo motor 401, a linear guide rail 402, and a slider 403. The linear guide rail 402 is horizontally mounted on the Z-axis lifting mechanism 6. The slider 403 slides and matches the linear guide rail 402. The slider 403 is connected to the output shaft of the servo motor 401 via a lead screw structure. The servo motor 401 drives the slider 403 to move horizontally on the linear guide rail 402 via the lead screw. The slider 403 is equipped with a spray gun gripper 5, which fixes the spray gun of the spraying system 8 onto the slider 403. The spray gun on the spray gun gripper 5 faces the substation transformer. The X-axis moving mechanism 4 adjusts the relative position of the spray gun and the substation transformer in the horizontal direction to ensure full horizontal coverage of the substation transformer.

[0026] The linear guide rail 402 is a high-precision linear guide rail, equipped with a travel limit switch, which combines hard and soft limits to prevent the slider 403 from running over the range; the X-axis moving mechanism 4 is equipped with a dust cover to prevent dust from affecting the transmission accuracy.

[0027] See attached document Figure 3The Z-axis lifting mechanism 6 includes a servo motor 601, a linear guide rail 602, a slider 603, and a Z-axis fixing seat 604. The Z-axis fixing seat 604 is a U-shaped long groove with its back fixed to the Z-axis fixing frame 7. The linear guide rail 602 is fixed in the U-shaped long groove of the Z-axis fixing seat 604. The slider 603 slides and matches the linear guide rail 602. The linear guide rail 402 of the X-axis moving mechanism 4 is fixed on the slider 603. The slider 603 is connected to the output shaft of the servo motor 601 through a lead screw structure. The servo motor 601 drives the slider 603 to move up and down along the vertically arranged linear guide rail 602, adjusting the height of the X-axis moving mechanism 4 to adapt to the spraying requirements of transformers for substations of different heights and controlling the spraying range and distance of the spray gun in the vertical direction.

[0028] The Z-axis lifting mechanism 6 is equipped with a known electromagnetic brake to prevent the slider 603 from falling accidentally in the event of power failure or malfunction.

[0029] The spraying system 8 is a known and commonly used device in the art, comprising a paint storage tank, a high-pressure delivery pump, a spray gun, an atomizer, and a paint filter. It can automatically deliver and atomize the paint, precisely spraying it onto the surface of the substation transformer to achieve uniform coating. The spraying pressure, flow rate, and atomization effect are adjustable to adapt to different paints and the requirements of the substation transformer. The spray gun is fixed to the slider 403 by a spray gun gripper 5, which is a known and commonly used locking mechanism.

[0030] See attached document Figure 6 The electrical control system 3 utilizes control technologies known and widely used in the field. The hardware includes a PLC controller 13, a touchscreen 14, servo drivers (motor driver 15, motor driver 2 16, and motor driver 3 17), various sensors, and a power supply. The PLC controller is a programmable logic controller, which implements functions such as logic control, sequential control, timing, counting, and arithmetic operations through programming, ultimately driving the actuators to complete automated tasks. The PLC controller controls the sampling of the distance sensor input to the RTV automatic spraying device, reads the torque sensor signal, and stores it in the image register. During program execution, the CPU interprets the user program line by line, performs logical operations based on the values ​​in the input image register, and writes the results to the output image register. Output refresh involves sending the value of the output image register to the physical output terminal to drive external devices to start and stop the servo motors. The program controls motor drive 15, motor drive 2 16, and motor drive 3 17, and controls the operation of servo motor 105, servo motor 2 601, and servo motor 3 401 to control the spraying start / stop, spraying flow rate, and spraying speed of the automatic spraying system 8; at the same time, by controlling different motor speeds, the optimal spraying effect can be achieved.

[0031] See attached document Figure 5The transport platform 2 includes longitudinal beams 201, casters 202, crossbeams 203, a support plate 204, feet 205, and a panel 206. The longitudinal beams 201 and crossbeams 203 are welded together to form a frame. The panel 206 is provided on the frame, and the casters 202 and feet 205 are installed at the bottom for transportation and support, respectively. During transportation, the feet 205 rotate up, and after reaching the designated position, the feet 205 rotate down to provide support and stability. The support plate 204 is provided on the panel for mounting the spraying system 8.

[0032] A method for automatically and uniformly spraying RTV coating onto a substation instrument transformer, using the aforementioned device, includes the following steps: fixing the substation instrument transformer to be coated onto an electric rotary table 1; adjusting the X-axis moving mechanism 4 and the Z-axis lifting mechanism 6 to match the spray gun on the X-axis moving mechanism 4 with the part of the substation instrument transformer to be coated; controlling the rotation of the electric rotary table 1 through the electrical control system 3, while simultaneously controlling the spraying system 8 and the spray gun to spray RTV coating onto the substation instrument transformer; and removing the substation instrument transformer after the coating has dried.

[0033] The electrical control system 3 controls the rotary table 101 of the electric rotary workbench 1 to rotate in both directions around the circumference. The rotational position of the workbench is fed back in real time through the equipped rotation angle encoder to ensure the spraying positioning accuracy. The current transformer is sprayed in a circumferential manner relative to the spray gun. After each spraying circle, the spray gun moves downward once according to the width of the spraying fan and continues spraying. After the first spraying of the current transformer insulator is completed, another spraying is carried out until the coating layer on the surface of the current transformer insulator meets the technical requirements.

[0034] The spraying system 8 is equipped with a solenoid valve to control the spraying of gas and paint. The solenoid valve is connected to the electrical control system 3 via a cable, automatically controlling the gas pressure and paint flow rate. A PLC controller controls the up-and-down and back-and-forth movement of the spray gun, coordinating with the rotation of the substation's instrument transformers to achieve precise positioning and automated spraying of the transformers. It can adapt to insulators of different shapes and sizes, enabling automatic spraying.

[0035] In this embodiment, the invention designs an automatic spraying device based on the structural shape of the external insulators of equipment such as current transformers and voltage transformers. The device has four casters at the bottom with a self-locking mechanism. The transport platform 2 is a rectangular platform with a plate thickness of 16 mm. An electric rotary table 1, driven by a servo motor 105, is mounted on the upper surface of the transport platform 2. To accommodate the maximum diameter of transformers used in substations, when installing the transformer to be sprayed on the electric rotary table 1, the center of the transformer is ensured to be symmetrical with the center of the electric rotary table 1 to prevent uneven spraying due to eccentricity.

[0036] Technical parameters of the spraying system: The spray gun can be used at different angles to adapt to the spraying position of the transformer skirt. The distance between the spray gun and the transformer skirt spraying position can be set. The spraying speed, spray volume, and pressure are all adjustable, and the spray gun travel speed can be set between 0-500 mm / s. The spray gun is fixed on slider one. The transformer used in the substation rotates with the electric rotary worktable 1, and the spray gun sprays up and down. The starting position can be set according to the height and diameter of the transformer. After completing the first coat of spraying the insulation support of the transformer, the next coat is sprayed according to the temperature and surface dryness until the coating on the surface of the transformer insulator meets the technical requirements.

[0037] Application of the spraying system: It is used for spraying RTV anti-flashover coating on the outer surface of the insulating porcelain bushing of 110kV and 220kV current or voltage transformers, which helps protect the health of spraying operators and improves work efficiency and spraying quality.

[0038] In this invention, the upper and lower cable conduits are fixed inside the tank cable chain to allow for vertical movement. The bottom rotating cable uses a CPS rotary circulating motion cable chain to allow for spraying around the entire circumference.

[0039] The spraying system can use the RQ4685 spraying machine, which uses a circular spraying gun. After each spraying circle, the spray gun descends once according to the width of the spraying fan, and the starting position is set according to the height and diameter of the current transformer.

[0040] In this embodiment, the electrical control system 3 is equipped with four program modules according to the diameter of the current transformer to be sprayed. The four program modules receive instructions through the touch buttons on the display screen.

[0041] See attached document Figure 6 The DC 48V voltage is obtained through step-down module 11 and step-down module 2 12. Step-down module 2 12 supplies power to PLC controller 13 and touch screen 14. Step-down module 11 supplies power to motor drive 15, motor drive 2 16 and motor drive 3 17. Motor drive 15, motor drive 2 16 and motor drive 3 17 control servo motor 105, servo motor 2 601 and servo motor 3 401 respectively.

[0042] Working process: The operating steps for automatically and uniformly spraying RTV coating onto LB6-110 type instrument transformers in substations are as follows: (1) Place the LB6-110 type current transformer for substations that needs to be sprayed on the rotary workbench 1 and fix it with screws to the corresponding bolt fixing holes.

[0043] (2) Start program B on the touch screen 14 of the electrical control system 3 (a total of four programs A, B, C and D can be set, corresponding to different types of transformers used in substations. The LB6-110 transformer has been set to B) and automatically perform a complete spraying once.

[0044] (3) Repeat the start of program B according to the required coating thickness of the current transformer.

[0045] (4) Wait for the coating to dry completely, remove the substation transformer, and complete the automatic uniform spraying of RTV coating on the LB6-110 transformer.

[0046] Explanation of relevant terms: Current transformer: A device used for measurement and protection in power supply systems such as power plants and substations, which transforms large currents into standard small currents.

[0047] RTV coating: A new type of hydrophobic coating using room temperature vulcanizing silicone rubber as the basic raw material. After being applied to the surface of the insulator, RTV coating can cure at room temperature into a rubber-like film, which firmly covers the surface of the insulator and can significantly improve the flashover voltage of the insulator.

[0048] The above description is merely the basic principle and preferred embodiment of the present invention. Improvements and substitutions made by those skilled in the art based on the present invention are within the scope of protection of the present invention.

Claims

1. A device for automatic uniform spraying of RTV coating on a transformer substation mutual inductor, characterized in that: The utility model relates to a kind of RTV coating uniform spraying device for transformer substation mutual inductor, including carrying platform (2), X-axis moving mechanism (4), Z-axis lifting mechanism (6), electric rotary table (1), spraying system (8) and electrical control system (3), spraying system (8) and electrical control system (3) are arranged on carrying platform (2), electric rotary table (1) is set in the middle of carrying platform (2), Z-axis fixed frame (7) is set beside electric rotary table (1), Z-axis lifting mechanism (6) is equipped on Z-axis fixed frame (7), X-axis moving mechanism (4) is equipped on Z-axis lifting mechanism (6), X-axis moving mechanism (4) front end is equipped with spraying gun grab (5), spraying gun of spraying system (8) is equipped on spraying gun grab (5), Z-axis lifting mechanism (6), X-axis moving mechanism (4) and electric rotary table (1) are automatically controlled by electrical control system (3), and spraying gun is completed to electric rotary table (1) on transformer substation mutual inductor by cooperation, RTV coating uniform spraying.

2. A device for automatic uniform spraying of RTV coating on a transformer substation mutual inductor according to claim 1, characterized in that: The electric rotary table (1) includes a rotary disc (101), a rotary support (102), a transmission gear (103), a speed reducer (104), and a servo motor (105). The rotary support (102) is an annular rack fixed below the rotary disc (101). The annular rack of the rotary support (102) is meshed and matched with the transmission gear (103). The transmission gear (103) is connected with the output shaft of the servo motor (105) through the speed reducer (104). The servo motor (105) drives the rotary disc (101) to rotate through the transmission gear (103) and the rotary support (102). A plurality of positioning holes (106) are opened on the rotary disc (101) to match the anchor bolts of the transformer substation mutual inductor to be sprayed. The transformer substation mutual inductor to be sprayed is fixed on the rotary disc (101).

3. A device for automatic uniform spraying of RTV coating on a transformer substation mutual inductor according to claim 2, characterized in that: The rotary disc (101), the rotary support (102), and the transmission gear (103) are located above the carrying platform (2). The speed reducer (104) and the servo motor (105) are installed below the carrying platform (2) and connected with the transmission gear (103) through the carrying platform (2) to drive the rotary disc (101) to rotate and drive the transformer substation mutual inductor to rotate around the vertical axis.

4. A device for automatic uniform spraying of RTV coating on a transformer substation mutual inductor according to claim 1 or 2, characterized in that: The X-axis moving mechanism (4) includes a servo motor (401), a linear guide rail (402), and a sliding block (403). The linear guide rail (402) is horizontally arranged on the Z-axis lifting mechanism (6). The sliding block (403) is slidingly matched with the linear guide rail (402). The sliding block (403) is connected with the output shaft of the servo motor (401) through a screw rod structure. The servo motor (401) drives the sliding block (403) to move horizontally on the linear guide rail (402) through the screw rod. The spraying gun grab (5) is arranged on the sliding block (403) to fix the spraying gun of the spraying system (8) on the sliding block (403). The spraying gun on the spraying gun grab (5) faces the transformer substation mutual inductor.

5. A device for automatic uniform spraying of RTV coating on a transformer substation mutual inductor according to claim 1 or 2, characterized in that: The Z-axis lifting mechanism (6) comprises a servo motor 2 (601), a linear guide rail 2 (602), a slider 2 (603) and a Z-axis fixed seat (604), the Z-axis fixed seat (604) is a U-shaped long groove, the groove back is fixed on the Z-axis fixed frame (7), and the linear guide rail 2 (602) is fixed in the U-shaped long groove of the Z-axis fixed seat (604); the slider 2 (603) is in sliding fit with the linear guide rail 2 (602), the linear guide rail 1 (402) of the X-axis moving mechanism (4) is fixed on the slider 2 (603), the slider 2 (603) is connected with the output shaft of the servo motor 2 (601) through a lead screw structure, the servo motor 2 (601) drives the slider 2 (603) to move up and down along the vertically arranged linear guide rail 2 (602), the height of the X-axis moving mechanism (4) is adjusted, the spraying needs of the mutual inductor for substations of different heights are adapted, and the spraying range and distance of the spraying gun in the vertical direction are controlled.

6. A device for automatic uniform spraying of RTV coating on a transformer substation mutual inductor according to claim 1 or 2, characterized in that: The carrying platform (2) comprises longitudinal beams (201), universal wheels (202), cross beams (203), supporting plates (204), ground feet (205) and face plates (206), the longitudinal beams (201) and the cross beams (203) are welded together to form a frame, the frame is provided with the face plates (206), the universal wheels (202) and the ground feet (205) are installed at the bottom, the ground feet (205) are rotated up during transportation, and the ground feet (205) are rotated down after reaching the position, so that the supporting and stabilizing effects are achieved, and the supporting plates (204) are arranged on the face plates (206) and used for installing the spraying system (8).

7. A method for automatic uniform spraying of RTV coating on a transformer substation transformer, using the device for automatic uniform spraying of RTV coating on a transformer substation transformer according to any one of claims 1-6, characterized in that The method comprises the following steps: fixing the mutual inductor for substations needing to be sprayed on the electric rotating workbench (1), matching the spraying gun on the X-axis moving mechanism (4) with the parts needing to be sprayed of the mutual inductor for substations by adjusting the X-axis moving mechanism (4) and the Z-axis lifting mechanism (6); rotating the electric rotating workbench (1) by controlling the electric control system (3), and spraying RTV paint on the mutual inductor for substations by controlling the spraying system (8) and the spraying gun, and taking down the mutual inductor for substations after the paint is dry.

8. A method of automatic uniform spray of RTV coating on a transformer substation mutual inductor as claimed in claim 7, wherein: The electric control system (3) controls the rotation disc (101) of the electric rotating workbench (1) to rotate in the circumferential direction, real-time feedback of the rotating position of the workbench is realized through the equipped rotation angle encoder, the spraying positioning accuracy is ensured, the mutual inductor for substations is sprayed in a surrounding mode relative to the spraying gun, the spraying gun is moved downward once and continues to spray according to the spraying fan width every spraying cycle, and the insulator of the mutual inductor for substations is sprayed for the first time, and then sprayed again until the spraying layer on the insulator surface of the mutual inductor for substations reaches the technical requirements.

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