Oil filling equipment for oil-immersed transformer

Abstract

The oil filling equipment comprises an oil tank placing main body, an oil tank main body and a control center, an oil tank fixing mechanism is arranged at the top of the oil tank placing main body, and the oil tank main body is limited and fixed through the oil tank fixing mechanism and is slidably connected to the top of the oil tank placing main body; an oil pump for conveying oil to the transformer is mounted on the outer surface wall of the oil tank body; a limiting metal block and a fixing base are arranged at the top of the oil tank body, a control center connecting mechanism is arranged on the fixing base, the control center is detachably installed on the fixing base through the control center connecting mechanism, the control center is electrically connected with the oil pump so as to control the oil conveying flow and pressure of the oil pump, and a double-rotating-rod heating and stirring mechanism is arranged in the oil tank body. The driving assembly drives the outer rotating rod and the inner rotating rod to rotate reversely, and the heating assembly synchronously rotates along with the rotating rods and heats oil. Therefore, uniform heating and full stirring of the insulating oil liquid in a low-temperature environment can be realized, the viscosity of the oil liquid is effectively reduced, and the oil filling quality and efficiency are improved.

Description

Technical Field

[0001] This application relates to the technical field of transformer oil filling, and more particularly to an oil filling device for an oil-immersed transformer. Background Technology

[0002] As a key piece of equipment in the power system, oil-immersed transformers use insulating oil as the core cooling and insulating medium and achieve voltage level conversion through the principle of electromagnetic induction. Its core structure uses cold-rolled grain-oriented silicon steel sheets stacked into a closed iron core, and the windings are sleeved on the iron core column to form the main body of electromagnetic induction. Three-phase transformers mostly adopt a triangular three-dimensional arrangement of iron core structure to reduce magnetic circuit loss and ensure efficient and stable power transmission.

[0003] In the production and operation of oil-immersed transformers, oil filling is a crucial step in ensuring the insulation performance and heat dissipation of the equipment. Existing oil filling equipment generally adopts a fixed oil tank design, which stores insulating oil in the tank, uses an oil pump to transport the oil to the oil pipe, and then injects it into the transformer oil tank through an oil gun. However, since the viscosity of insulating oil increases significantly as the temperature decreases, low temperature can easily lead to poor oil fluidity, resulting in problems such as slow filling speed, unstable flow, or even pipe blockage, which affects the quality of oil filling and operational efficiency. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, one objective of this application is to provide an oil-immersed transformer filling device that achieves uniform heating and thorough stirring of insulating oil in low-temperature environments through a heating and stirring structure with two rotating rods in opposite directions, effectively reducing oil viscosity, solving the problem of weak low-temperature adaptability of traditional equipment, and improving filling quality and efficiency.

[0006] To achieve the above objectives, the first aspect of this application provides an oil-immersed transformer filling device, including an oil tank placement body, an oil tank body, and a control center for controlling filling operation parameters. The oil tank placement body has an oil tank fixing mechanism at its top, and the oil tank body is limited and slidably connected to the top of the oil tank placement body by the oil tank fixing mechanism. An oil pump for supplying oil to the transformer is installed on the outer wall of the oil tank body. A limiting metal block and a fixing base are provided at the top of the oil tank body, and a control center connection mechanism is mounted on the fixing base. The control center is detachably mounted on a fixed base via a control center connection mechanism, and is electrically connected to the oil pump to control the oil pump's oil delivery flow rate and pressure. The oil tank body is equipped with a double-rotor heating and stirring mechanism, which includes an outer rotor, an inner rotor, a drive assembly, and a heating assembly. The outer rotor is rotatably connected to the inner wall of the oil tank body, and the inner rotor is rotatably connected to the inner wall of the outer rotor. The drive assembly drives the outer rotor and the inner rotor to rotate in opposite directions, and the heating assembly rotates synchronously with the rotors and heats the oil.

[0007] The oil-immersed transformer filling equipment of this application embodiment achieves uniform heating and thorough stirring of insulating oil in low-temperature environments through a heating and stirring structure with double rotating rods rotating in opposite directions. This effectively reduces the viscosity of the oil, solves the problem of weak low-temperature adaptability of traditional equipment, improves the quality and efficiency of filling, and also effectively solves the problem of cumbersome disassembly and maintenance caused by the rigid connection between the oil tank and the main body in traditional filling equipment. This effectively improves the convenience of disassembly and maintenance and the flexibility of operation.

[0008] In addition, the oil-immersed transformer filling device proposed in this application may also have the following additional technical features: In one embodiment of this application, the control center connection mechanism includes a limiting plate fixed to the top of the fixed base. A bottom T-block is slidably connected to the inner surface of the limiting plate. A mounting frame is fixed to the top of the bottom T-block, and the control center is fixed to the top of the mounting frame. A limiting block is fixed to the outer surface of the bottom T-block. A fixing body is fixed to the outer surface of the fixed base. An adjusting screw is threadedly connected to the inner surface of the fixing body. A knob is fixed to the bottom of the adjusting screw, and a sliding block is rotatably connected to the top of the adjusting screw. A limiting rod that is slidably connected to the fixing body is fixed to the bottom of the sliding block.

[0009] In one embodiment of this application, a sliding rail is fixedly connected to the bottom of the oil tank placement body, a servo motor is installed on one side of the sliding rail, a double-threaded rod is fixedly connected to the output end of the servo motor, the double-threaded rod is rotatably connected to the inner wall of the sliding rail, and an inner slider is threadedly connected to the outer wall of the double-threaded rod, the inner slider being slidably connected to the inner wall of the sliding rail.

[0010] In one embodiment of this application, a top block is fixedly connected to the bottom of the inner slider, a rotating support rod is rotatably connected to the outer wall of the top block, a bottom block is rotatably connected to one end of the rotating support rod, and a device base is connected to the bottom of the bottom block.

[0011] In one embodiment of this application, a hollow slide rod is fixedly connected to the top of the equipment base, and an internal gear slide rod is slidably connected to the inner surface of the hollow slide rod. The internal gear slide rod is fixedly connected to the bottom of the oil tank placement body. A support frame is fixedly connected to the top of the equipment base, and a linkage rod is rotatably connected to the top of the support frame. Transmission gears are fixedly connected to both ends of the linkage rod, and the transmission gears mesh with one side of the internal gear slide rod.

[0012] In one embodiment of this application, a handle is fixedly connected to the top of the device base, and casters are installed at the bottom of the device base.

[0013] In one embodiment of this application, a motor frame is fixedly connected to the outer wall of the oil tank body, a DC motor is installed on the outer wall of the motor frame, and a motor bevel gear is fixedly connected to the output end of the DC motor.

[0014] In one embodiment of this application, the drive assembly includes a motor frame fixed to the outer wall of the oil tank body, a DC motor mounted on the motor frame, and a motor bevel gear fixedly connected to the output end of the DC motor; a first bevel gear is fixed to the outer wall of the outer rotating rod, and a second bevel gear is fixed to one end of the inner rotating rod. Both the first and second bevel gears mesh with the motor bevel gear, and the meshing directions of the first and second bevel gears are opposite.

[0015] In one embodiment of this application, the heating assembly includes an outer frame fixed to the other end of the inner rotating rod, and resistance heating rods are installed on the outer walls of both the outer frame and the outer rotating rod.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a perspective view of an oil-immersed transformer filling device according to an embodiment of this application; Figure 2 This is a perspective view of the main body of the oil tank placement device of an oil-immersed transformer according to an embodiment of this application; Figure 3This is a perspective view of the sliding track of an oil-immersed transformer filling device according to an embodiment of this application; Figure 4 This is a perspective view of the fixed base of an oil-immersed transformer filling device according to an embodiment of this application; Figure 5 This is a perspective view of the control center of an oil-immersed transformer filling device according to an embodiment of this application; Figure 6 This is a perspective view of the mounting frame of an oil-immersed transformer filling device according to an embodiment of this application; Figure 7 This is a perspective view of the main body of the oil tank of an oil-immersed transformer filling device according to an embodiment of this application; Figure 8 This is an enlarged view of point A in an oil-immersed transformer filling device according to an embodiment of this application.

[0018] As shown in the figure: 1. Main body of the oil tank; 2. Equipment base; 3. Casters; 4. Handle; 5. Main body of the oil tank; 6. Oil pump; 7. Metal hoop; 8. Fixing bolts; 9. Fixing nuts; 10. Fixed base; 11. Mounting frame; 12. Control center; 13. Sliding rail; 14. Servo motor; 15. Hollow slide rod; 16. Internal gear slide rod; 17. Support frame; 18. Linkage rod; 19. Transmission gear; 20. Rotating support rod; 21. Base block; 22. 23. Double-threaded rod; 24. Inner slider; 25. Top block; 26. Motor frame; 27. DC motor; 28. Motor bevel gear; 29. ​​First bevel gear; 20. Second bevel gear; 31. Limiting metal block; 32. Bottom T-block; 33. Limiting plate; 34. Limiting block; 35. Fixed body; 36. Outer rotating rod; 37. Inner rotating rod; 38. Outer frame; 39. Resistance heating rod; 40. Knob; 41. Sliding block; 42. Limiting rod; 43. Adjusting screw. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] The oil-immersed transformer oil filling device of this application embodiment will be described below with reference to the accompanying drawings.

[0021] like Figures 1-8 As shown, the oil-immersed transformer filling equipment of this application embodiment may include an oil tank placement body 1, an oil tank body 5, and a control center 12 for controlling the filling operation parameters.

[0022] The oil tank placement body 1 is equipped with an oil tank fixing mechanism on its top. The oil tank body 5 is fixed and slidably connected to the top of the oil tank placement body 1 by the oil tank fixing mechanism. An oil pump 6 for supplying oil to the transformer is installed on the outer wall of the oil tank body 5. A limiting metal block 30 and a fixing base 10 are provided on the top of the oil tank body 5. A control center connection mechanism is provided on the fixing base 10. The control center 12 is detachably installed on the fixing base 10 through the control center connection mechanism. The control center 12 is electrically connected to the oil pump 6 to control the oil supply flow rate and pressure of the oil pump 6.

[0023] The oil tank body 5 is equipped with a double-rotor heating and stirring mechanism, which includes an outer rotating rod 35, an inner rotating rod 36, a drive assembly, and a heating assembly. The outer rotating rod 35 is rotatably connected to the inner wall of the oil tank body 5, and the inner rotating rod 36 is rotatably connected to the inner wall of the outer rotating rod 35. The drive assembly drives the outer rotating rod 35 and the inner rotating rod 36 to rotate in opposite directions, and the heating assembly rotates synchronously with the rotating rods to heat the oil.

[0024] Specifically, the top of the oil tank placement body 1 is equipped with an oil tank fixing mechanism. The oil tank body 5 is limited and fixed by the oil tank fixing mechanism and slidably connected to the top of the oil tank placement body 1. The top of the oil tank body 5 is equipped with a limiting metal block 30 and a fixing base 10. The fixing base 10 is equipped with a control center connection mechanism. The control center 12 is detachably installed on the fixing base 10 through the control center connection mechanism. The oil pump 6 serves as the power source for oil transportation. The internal impeller or plunger structure is driven to rotate by the motor, so that the insulating oil in the oil tank body 5 enters the oil pump 6 under the action of pressure difference. After being pressurized by the oil pump 6, it is transported to the oil gun and other oil filling components through the oil outlet pipe to realize the oil filling operation of the transformer oil tank. The control center 12 can adjust the oil transportation flow and pressure by adjusting the motor speed of the oil pump 6 to adapt to different oil filling needs.

[0025] In addition, the control center 12 also monitors the oil temperature inside the oil tank body 5. If it is in a low temperature environment, the outer rotating rod 35 and the inner rotating rod 36 are driven to rotate in opposite directions by the drive component. At the same time, the heating component is powered on to heat up, and the oil is uniformly heated and stirred as the rotating rod rotates to reduce the viscosity of the oil.

[0026] In one embodiment of this application, such as Figure 1 As shown, the oil tank fixing mechanism includes a metal hoop 7 rotatably connected to the top of the oil tank placement body 1, a fixing bolt 8 slidably connected to the inner surface of the metal hoop 7, and fixing nuts 9 for locking the metal hoop 7 are threaded to both ends of the fixing bolt 8.

[0027] Specifically, the metal hoop 7 adopts a ring-shaped structure to wrap around the outer wall of the oil tank body 5. The fixing bolts 8 pass through both ends of the metal hoop 7. By tightening the fixing nut 9, the bolts generate axial tension, which causes the open end of the metal hoop 7 to contract, thereby applying radial clamping force to the oil tank body 5 and firmly fixing it to the top of the oil tank placement body 1, so as to prevent the oil tank body 5 from being displaced due to vibration or external force during the oil filling operation.

[0028] When it is necessary to disassemble or replace the main body 5 of the oil tank, simply loosen the fixing nut 9 in the reverse direction to release the clamping force of the fixing bolt 8 on the metal clamp 7. The metal clamp 7 will open under its own elasticity or the action of external force, allowing the main body 5 of the oil tank to slide out from the top of the oil tank placement body 1. This achieves quick disassembly and assembly, solving the problem of cumbersome disassembly of traditional fixed oil tanks and improving the convenience of maintenance. In one embodiment of this application, such as Figures 1-8 As shown, the control center connection mechanism includes a limiting plate 32 fixed to the top of the fixed base 10. A bottom T-block 31 is slidably connected to the inner surface of the limiting plate 32. A mounting bracket 11 is fixed to the top of the bottom T-block 31. The control center 12 is fixed to the top of the mounting bracket 11. A limiting block 33 is fixed to the outer surface of the bottom T-block 31. A fixed body 34 is fixed to the outer surface of the fixed base 10. An adjusting screw 42 is threadedly connected to the inner surface of the fixed body 34. A knob 39 is fixed to the bottom of the adjusting screw 42. A sliding block 40 is rotatably connected to the top of the adjusting screw 42. A limiting rod 41 that is slidably connected to the fixed body 34 is fixed to the bottom of the sliding block 40.

[0029] Specifically, the T-shaped groove of the limiting plate 32 provides precise guidance for the bottom T-block 31. During installation, the bottom T-block 31 is pushed in along the groove, which can drive the mounting bracket 11 and the control center 12 to quickly reach the preset position and complete the initial positioning, avoiding the alignment problem of traditional bolt fixing.

[0030] After positioning, turn knob 39 to drive adjusting screw 42 to rotate within fixed body 34. Since adjusting screw 42 is threadedly engaged with fixed body 34, rotational motion is converted into axial upward motion, which drives sliding block 40 to move up along the guide direction of limit rod 41 until sliding block 40 is tightly engaged at the bottom or side of limit block 33. Through mechanical clamping force, bottom T-block 31 is locked in limit plate 32 to ensure that control center 12 does not loosen or shift during operation.

[0031] When the control center 12 needs to be disassembled, the knob 39 is rotated in the opposite direction to make the adjusting screw 42 move the sliding block 40 down, releasing the clamping constraint on the limit block 33. At this time, the bottom T-block 31 can be slid out directly along the slide groove of the limit plate 32, realizing the modular and quick disassembly of the control center, which is convenient for maintenance, replacement or separate transportation of control center components.

[0032] In one embodiment of this application, such as Figures 1-8 As shown, a sliding rail 13 is fixedly connected to the bottom of the oil tank placement body 1. A servo motor 14 is installed on one side of the sliding rail 13. A double-threaded rod 22 is fixedly connected to the output end of the servo motor 14. The double-threaded rod 22 is rotatably connected to the inner wall of the sliding rail 13. An inner slider 23 is threadedly connected to the outer wall of the double-threaded rod 22. The inner slider 23 is slidably connected to the inner wall of the sliding rail 13.

[0033] Specifically, the servo motor 14 starts after receiving instructions from the control center 12, and its output shaft drives the double-threaded rod 22 to rotate within the sliding rail 13. Since the outer wall of the double-threaded rod 22 has two threads in opposite directions, and the inner slider 23 is threadedly connected to the double-threaded rod 22 and limited by the sliding rail 13 to prevent rotation, the rotational motion of the double-threaded rod 22 is converted into the linear sliding motion of the inner slider 23 along the inner wall of the sliding rail 13. By controlling the forward and reverse rotation of the servo motor 14, the inner slider 23 can be driven to reciprocate within the sliding rail 13, providing the basic power for subsequently raising or lowering the oil tank placement body 1 or adjusting its position, thus realizing the height adjustment or position fine-tuning function of the equipment.

[0034] In one embodiment of this application, such as Figures 1-8 As shown, a top block 24 is fixedly connected to the bottom of the inner slider 23, a rotating support rod 20 is rotatably connected to the outer wall of the top block 24, a bottom block 21 is rotatably connected to one end of the rotating support rod 20, and a device base 2 is connected to the bottom of the bottom block 21.

[0035] Specifically, the inner slider 23, the top block 24, the rotating support rod 20, and the bottom block 21 form a scissor-type lifting transmission structure. When the servo motor 14 drives the double-threaded rod 22 to rotate, causing the inner slider 23 to slide relative to or towards each other along the sliding track 13, the inner slider 23 drives one end of the rotating support rod 20 to move synchronously through the top block 24 fixed at the bottom. Since the two ends of the rotating support rod 20 are rotatably connected to the top block 24 and the bottom block 21 respectively, and the bottom block 21 is fixed on the equipment base 2 and cannot move, the rotating support rod 20 will deflect around the bottom block 21 at an angle, and its tilt angle changes with the sliding of the inner slider 23. When the inner sliders 23 are close to each other, the tilt angle of the rotating support rod 20 decreases, the overall height increases, thereby pushing the oil tank placement body 1 upward; when the inner sliders 23 are far apart, the tilt angle of the rotating support rod 20 increases, the overall height decreases, and the oil tank placement body 1 sinks downward. Through this mechanical transmission process, the linear sliding motion of the inner slider 23 is transformed into the lifting motion of the oil tank placement body 1, thereby realizing the height adjustment of the oil tank body 5 to adapt to the oil filling operation requirements of transformers at different heights and improve the adaptability of the equipment to operating conditions.

[0036] In one embodiment of this application, such as Figures 1-8As shown, a hollow slide rod 15 is fixedly connected to the top of the equipment base 2, and an internal gear slide rod 16 is slidably connected to the inner surface of the hollow slide rod 15. The internal gear slide rod 16 is fixedly connected to the bottom of the oil tank placement body 1. A support frame 17 is fixedly connected to the top of the equipment base 2, and a linkage rod 18 is rotatably connected to the top of the support frame 17. Transmission gears 19 are fixedly connected to both ends of the linkage rod 18, and the transmission gears 19 mesh with one side of the internal gear slide rod 16.

[0037] Specifically, this mechanism is a guiding and synchronous transmission structure during the lifting and lowering process of the oil tank placement body 1. When the oil tank placement body 1 moves up and down under the drive of the rotating support rod 20, the internal gear slide rod 16 fixed at its bottom moves up and down together. At this time, the internal gear slide rod 16 slides vertically along the inner surface wall of the hollow slide rod 15. The hollow slide rod 15 forms a guiding constraint on it through the inner wall, preventing the oil tank placement body 1 from horizontally shifting or swaying during the lifting and lowering process, and ensuring the stability of the lifting and lowering movement.

[0038] Simultaneously, when the internal gear slide 16 rises and falls, the tooth surface on one side meshes with the transmission gear 19, driving the transmission gear 19 to rotate. This, in turn, causes the transmission gears 19 at both ends to rotate synchronously via the linkage rod 18. Since the transmission gears 19 on both sides mesh with the corresponding internal gear slide 16, the linkage rod 18 ensures that the rotational speed and direction of the transmission gears 19 on both sides are completely consistent, thus keeping the rising and falling heights of the internal gear slides 16 on both sides within the hollow slide rod 15 synchronized. This synchronous transmission prevents the oil tank placement body 1 from tilting due to inconsistent rising and falling speeds on both sides, further ensuring the stability and safety of the oil tank placement body 1 and the oil tank body 5 during the rising and falling process, and improving the structural reliability of the equipment during height adjustment.

[0039] In one embodiment of this application, such as Figures 1-8 As shown, a handle 4 is fixedly connected to the top of the equipment base 2, and casters 3 are installed at the bottom of the equipment base 2.

[0040] Specifically, the handle 4 is fixedly connected to a pre-set installation position on the top of the equipment base 2 by welding, bolting, or integral molding. The handle 4 adopts an ergonomic structural design, usually a U-shaped or arc-shaped rod structure, and the surface can be treated with anti-slip treatment (such as adding rubber sleeves or textures) to facilitate the operator's grip and application of force.

[0041] At the four corners of the bottom of the equipment base 2 or at the preset support points, the casters 3 are fixedly installed using bolts or pins. The casters 3 are selected to be models with a braking function, and their wheel bodies are made of wear-resistant rubber or polyurethane material. The wheel frame is connected to the bottom of the equipment base 2 through a rotating shaft to ensure that the casters 3 can rotate 360° flexibly.

[0042] The casters 3 at the bottom of the equipment base 2 convert the sliding friction between the equipment and the ground into rolling friction through rolling contact between the wheels and the ground, significantly reducing the resistance when moving the equipment. Operators can apply pushing or pulling force by gripping the handle 4 on top of the equipment base 2, driving the entire equipment to move in any direction. Combined with the 360° turning capability of the casters 3, the equipment can flexibly move between different work sites and easily adjust to the required working position for transformer oil filling, solving the problem of difficult transportation of traditional fixed oil filling equipment.

[0043] Once the equipment has moved to the target work position, the braking device on the swivel casters 3 can restrict the rotation of the casters, allowing the equipment to be stably parked in the current position. This prevents the equipment from accidentally slipping during the oil filling operation, which could affect the accuracy or safety of the operation. The handle 4 can also serve as a temporary support point when the equipment is stationary, facilitating the operator's inspection, adjustment, and other operations.

[0044] In one embodiment of this application, such as Figure 7 As shown, a motor frame 25 is fixedly connected to the outer wall of the oil tank body 5, a DC motor 26 is installed on the outer wall of the motor frame 25, and a motor bevel gear 27 is fixedly connected to the output end of the DC motor 26.

[0045] Specifically, a mounting plane is pre-set on the outer wall of the oil tank body 5, and the motor frame 25 is fixedly connected by welding or bolting. The motor frame 25 is made of bent or cast metal sheet, and has sufficient structural strength to support the weight of the DC motor 26 and the vibration load during operation.

[0046] The DC motor 26 is bolted to the outer wall of the motor frame 25, ensuring that the motor output shaft faces the oil tank body 5. The motor bevel gear 27 is fixedly connected to the output end of the DC motor 26 by key connection or welding. The machining accuracy of the motor bevel gear 27 must meet the transmission requirements to ensure smooth meshing with subsequent transmission components.

[0047] Specifically, the control center 12 starts the DC motor 26 based on oil temperature monitoring data or operational requirements. After the DC motor 26 is powered on, its output shaft rotates, driving the motor bevel gear 27 fixed at its output end to rotate synchronously. The motor bevel gear 27 transmits power to other bevel gear components (such as the first bevel gear 28 on the outer rotating rod 35 and the second bevel gear 29 on the inner rotating rod 36) through gear meshing, thereby changing the direction of power (converting the horizontal rotational power of the DC motor into the vertical rotational power of the rotating rod), providing a driving source for the stirring and heating of the oil inside the oil tank body 5, ensuring the stable operation of the subsequent heating and stirring structure, and improving the fluidity of the oil in low-temperature environments.

[0048] In one embodiment of this application, such as Figure 7As shown, the drive assembly includes a motor frame 25 fixed to the outer wall of the oil tank body 5. A DC motor 26 is mounted on the motor frame 25. A motor bevel gear 27 is fixedly connected to the output end of the DC motor 26. A first bevel gear 28 is fixed to the outer wall of the outer rotating rod 35. A second bevel gear 29 is fixed to one end of the inner rotating rod 36. Both the first bevel gear 28 and the second bevel gear 29 mesh with the motor bevel gear 27, and the meshing directions of the first bevel gear 28 and the second bevel gear 29 are opposite.

[0049] Specifically, the outer rotating rod 35 and the inner rotating rod are connected by a double-layer nested rotating structure to achieve independent rotation. When the DC motor 26 is driven by the motor bevel gear 27, the outer rotating rod 35 can rotate around the inner wall of the oil tank body 5 under the drive of the first bevel gear 28, while the inner rotating rod 36 can rotate independently around the inner surface wall of the outer rotating rod 35 under the drive of the second bevel gear 29. Since the two are connected to different bevel gears, they can rotate in opposite directions or at different speeds under the power of the motor, thereby driving the heating and stirring components (such as resistance heating rod 38 and external frame 37) on their respective outer walls to stir the oil in the oil tank body 5, so that the oil is heated evenly, reducing the viscosity of the oil in low-temperature environments and ensuring the smoothness of the oil filling operation. This double-layer rotating rod structure expands the stirring range and improves the oil mixing and heating efficiency.

[0050] When the DC motor 26 drives the motor bevel gear 27 to rotate, since both the first bevel gear 28 and the second bevel gear 29 mesh with the motor bevel gear 27, the rotational power of the motor bevel gear 27 is simultaneously transmitted to both bevel gears. Because the first bevel gear 28 and the second bevel gear 29 are respectively fixed on the outer rotating rod 35 and the inner rotating rod 36, and their meshing directions with the motor bevel gear 27 are opposite, the outer rotating rod 35 and the inner rotating rod 36 produce opposite rotational movements (when the outer rotating rod rotates clockwise, the inner rotating rod rotates counterclockwise, and vice versa). This reverse rotation structure can create strong oil convection within the oil tank body 5, significantly improving the stirring effect.

[0051] In one embodiment of this application, such as Figures 1-8 As shown, the heating assembly includes an outer frame 37 fixed to the other end of the inner rotating rod 36, and resistance heating rods 38 are installed on the outer walls of both the outer frame 37 and the outer rotating rod 35.

[0052] Specifically, during the rotation of the rotating rod, the control center 12 synchronously controls the resistance heating rods 38 on the outer frame 37 and the outer rotating rod 35 to be energized and heated. The heat is transferred to the surrounding oil through the surface of the heating rods. The rotation of the outer rotating rod 35 drives the heating rods on its surface to directly stir the oil. The inner rotating rod 36 drives the heating rods to rotate in the opposite direction inside the oil through the outer frame 37, further expanding the heating and stirring range. The shear force generated by the reverse rotation causes the oil to flow turbulently, avoiding local overheating or uneven heating, ensuring that the overall temperature of the oil rises uniformly, effectively reducing the viscosity of the oil in low-temperature environments, ensuring smooth oil delivery during the filling process, and improving the quality and efficiency of the filling operation.

[0053] It should be noted that the control center 12 described in the above embodiment integrates an operation panel, control module, and electrical interface. It can be detachably installed on the fixed base 10 on the top of the oil tank body 5 through the control center connection mechanism to realize the control of the entire oil filling operation process. Its surface is embedded with a touch screen and physical operation buttons, and its interior is equipped with a PLC control unit, relay module, and temperature and pressure detection interface. It is fixedly connected to the bottom T-block 31 through the bottom mounting bracket 11. With the sliding cooperation between the bottom T-block 31 and the top limiting plate 32 of the fixed base 10, the initial positioning can be quickly completed. With the locking structure such as the adjusting screw 42 and sliding block 40 on the fixed body 34, the control center 12 can be stably installed to ensure that there is no loosening or displacement during the operation, while meeting the requirements of modular quick disassembly and assembly, which is convenient for individual inspection or replacement.

[0054] The control center 12 establishes electrical connections with each actuator of the equipment via wires, specifically including: The control center 12 is electrically connected to the oil pump 6 on the outer wall of the oil tank body 5. The oil pump motor speed is adjusted to realize the real-time regulation of oil delivery flow and pressure. Parameters such as oil filling volume and pressure threshold can be preset on the touch screen to meet the oil filling requirements of different transformer models.

[0055] The control center 12 is electrically connected to the servo motor 14 on one side of the sliding rail 13. After receiving the position sensor signal, it controls the servo motor to drive the double threaded rod 22 to rotate by reversing the forward and reverse rotation, thereby controlling the lifting height of the oil tank placement body 1 and achieving precise alignment between the oil filling port and the transformer oil tank.

[0056] The control center 12 is electrically connected to the DC motor 26 on the motor frame 25. The motor speed can be set to adjust the rotation speed of the outer rotating rod 35 and the inner rotating rod 36. With the help of the temperature detection module, dynamic control of the heating and stirring intensity can be achieved.

[0057] The control center 12 is electrically connected to the resistance heating rod 38 on the external frame 37 and the external rotating rod 35. It monitors the oil temperature in the oil tank through the built-in temperature control algorithm and automatically adjusts the heating power to ensure that the oil temperature is maintained in the optimal filling range (usually 40-60℃) and avoid local overheating or insufficient heating.

[0058] In addition, the control center 12 is equipped with status monitoring and alarm functions. It can display key parameters such as oil pump pressure, oil temperature, and equipment height in real time. When abnormal pressure, excessive temperature, or component failure is detected, it will immediately trigger an audible and visual alarm and automatically cut off the power supply to the relevant actuators to ensure operational safety.

[0059] In summary, the oil-immersed transformer filling equipment of this application embodiment achieves uniform heating and thorough stirring of insulating oil in low-temperature environments through a heating and stirring structure with double rotating rods rotating in opposite directions. This effectively reduces the viscosity of the oil, solves the problem of weak low-temperature adaptability of traditional equipment, and improves the quality and efficiency of filling.

[0060] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An oil-filling device for an oil-immersed transformer, characterized in that, It includes the main body of the oil tank, the main body of the oil tank, and a control center for controlling the parameters of the oil filling operation, among which, The top of the oil tank placement body is provided with an oil tank fixing mechanism. The oil tank body is limited and fixed by the oil tank fixing mechanism and slidably connected to the top of the oil tank placement body. An oil pump for conveying oil to the transformer is installed on the outer wall of the oil tank body. The top of the oil tank body is provided with a limiting metal block and a fixed base. The fixed base is provided with a control center connection mechanism. The control center is detachably installed on the fixed base through the control center connection mechanism, and the control center is electrically connected to the oil pump to control the oil delivery flow rate and pressure of the oil pump. The oil tank body is equipped with a double-rotor heating and stirring mechanism, which includes an outer rotor, an inner rotor, a drive assembly, and a heating assembly. The outer rotor is rotatably connected to the inner wall of the oil tank body, and the inner rotor is rotatably connected to the inner wall of the outer rotor. The drive assembly drives the outer rotor and the inner rotor to rotate in opposite directions, and the heating assembly rotates synchronously with the rotor and heats the oil.

2. The oil filling equipment for an oil-immersed transformer according to claim 1, characterized in that, The control center connection mechanism includes a limiting plate fixed to the top of the fixed base, a bottom T-block slidably connected to the inner surface of the limiting plate, a mounting frame fixed to the top of the bottom T-block, and the control center fixed to the top of the mounting frame. A limit block is fixed to the outer wall of the bottom T-shaped block, and a fixing body is fixed to the outer wall of the fixing base. An adjusting screw is threaded to the inner wall of the fixing body. A knob is fixed to the bottom of the adjusting screw, and a sliding block is rotatably connected to the top. A limit rod that is slidably connected to the fixing body is fixed to the bottom of the sliding block.

3. The oil-immersed transformer oil filling device according to claim 1, characterized in that, The bottom of the oil tank placement body is fixedly connected to a sliding rail. A servo motor is installed on one side of the sliding rail. A double-threaded rod is fixedly connected to the output end of the servo motor. The double-threaded rod is rotatably connected to the inner wall of the sliding rail. An inner slider is threadedly connected to the outer wall of the double-threaded rod. The inner slider is slidably connected to the inner wall of the sliding rail. The servo motor is electrically connected to the control center.

4. The oil-immersed transformer oil filling device according to claim 3, characterized in that, The bottom of the inner slider is fixedly connected to a top block, the outer wall of the top block is rotatably connected to a rotating support rod, one end of the rotating support rod is rotatably connected to a bottom block, and the bottom of the bottom block is connected to a device base.

5. The oil filling device for an oil-immersed transformer according to claim 4, characterized in that, A hollow slide rod is fixedly connected to the top of the equipment base, and an internal gear slide rod is slidably connected to the inner surface of the hollow slide rod. The internal gear slide rod is fixedly connected to the bottom of the oil tank placement body. A support frame is fixedly connected to the top of the equipment base, and a linkage rod is rotatably connected to the top of the support frame. Transmission gears are fixedly connected to both ends of the linkage rod, and the transmission gears mesh with one side of the internal gear slide rod.

6. The oil filling device for an oil-immersed transformer according to claim 4, characterized in that, A handle is fixedly connected to the top of the equipment base, and casters are installed at the bottom of the equipment base.

7. The oil filling device for an oil-immersed transformer according to claim 1, characterized in that, A motor frame is fixedly connected to the outer wall of the main body of the oil tank, a DC motor is installed on the outer wall of the motor frame, and a motor bevel gear is fixedly connected to the output end of the DC motor.

8. The oil filling device for an oil-immersed transformer according to claim 1, characterized in that, The drive assembly includes a motor frame fixed to the outer wall of the oil tank body, a DC motor mounted on the motor frame, and a motor bevel gear fixedly connected to the output end of the DC motor. The outer rotating rod has a first bevel gear fixed to its outer wall, and the inner rotating rod has a second bevel gear fixed to one end. Both the first and second bevel gears mesh with the motor bevel gear, and the meshing directions of the first and second bevel gears are opposite.

9. The oil-immersed transformer oil filling device according to claim 8, characterized in that, The heating assembly includes an outer frame fixed to the other end of the inner rotating rod, and resistance heating rods are installed on the outer walls of both the outer frame and the outer rotating rod.

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