High-efficiency oil-immersed power transformer with layered heat dissipation oil ducts

Abstract

The application relates to the field of transformers, in particular to a high-efficiency oil-immersed power transformer with layered heat-dissipation oil channels, and aims to provide a high-efficiency oil-immersed power transformer with layered heat-dissipation oil channels, which can solve the problems in the prior art.The high-efficiency oil-immersed power transformer with layered heat-dissipation oil channels comprises a transformer oil tank, two heat-dissipation assemblies are respectively arranged on the opposite sides of the outer side of the transformer oil tank, two agitating discs are respectively rotationally connected to the two sides of the lower end of the transformer oil tank, and an air inlet assembly is arranged on the lower side of the agitating disc.The layered heat-dissipation oil channel design can uniformly distribute the cooling oil to each heat-dissipation diaphragm according to layers, greatly increases the heat exchange area, and through the first spiral vane plate and the second spiral vane plate of the agitating disc, the cooling oil is pushed to form a circulating convection under normal rotating speed;when the oil temperature exceeds the standard, the spiral air bubbles sprayed by the air inlet assembly drive the cooling oil to be violently disturbed, and the air bubbles can carry part of the heat, so that the temperature of each area in the oil tank is balanced, and the heat-dissipation effect is improved.

Description

Technical Field

[0001] This invention relates to the field of transformers, and in particular to a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels. Background Technology

[0002] As a core device for power transmission and transformation in a power system, the operational stability of oil-immersed power transformers directly affects the reliability of power supply. During operation, the windings and core of a transformer generate a large amount of heat due to electromagnetic induction. If this heat cannot be dissipated in time, the temperature of the cooling oil in the tank will rise, which will not only reduce the transformer's insulation performance and shorten its service life, but in severe cases, may also cause safety accidents such as insulation breakdown and winding burnout. Therefore, efficient heat dissipation is crucial to ensuring the stable operation of oil-immersed transformers.

[0003] Existing oil-immersed transformers mainly rely on traditional oil duct natural cooling or simple air cooling as auxiliary methods for heat dissipation. For example, the oil-immersed transformer with heat dissipation through conduit disclosed in patent application No. 201310431412.6 and the oil-immersed transformer with heat dissipation structure disclosed in patent application No. 202411774337.8 have many shortcomings. Traditional oil channel designs are simple, and heat dissipation components mostly adopt planar structures with small contact areas with air. Airflow is prone to form vortex dead zones on the surface. Although most use air cooling as an auxiliary, the small contact area of ​​heat dissipation components and the simple flow path make it difficult for heat to accumulate and dissipate quickly during the flow process. In addition, the circulation of cooling oil mostly relies on natural convection, which is slow and cannot fully cover the heat-generating components, resulting in insufficient heat absorption. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels, effectively solving the problems mentioned in the background section.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows: A high-efficiency oil-immersed power transformer with a layered heat dissipation oil channel includes a transformer tank. Heat dissipation components are installed on two diagonally opposite sides of the outer side of the transformer tank. Each heat dissipation component includes multiple oil outlet pipes that are fixedly connected to the upper and lower sides of the outer end of the transformer tank. Multiple dispersion pipes are fixedly connected to the surface of the oil outlet pipes in layers along the axial direction. Heat dissipation films are fixedly connected between the upper and lower corresponding layers of dispersion pipes to form a layered heat dissipation oil channel. The transformer oil tank has two rotatably connected agitator plates on both sides of its lower end. When the agitator plates rotate at normal speed, they drive the cooling oil to flow. An air intake assembly is installed on the lower side of the agitator plates, and the air outlet of the air intake assembly is located on the agitator plates. When the agitator plates rotate rapidly, the air intake assembly sprays air into the transformer oil tank.

[0006] Furthermore, the heat dissipation film has a hollow curved surface structure.

[0007] Furthermore, air-cooling components are installed diagonally between the two heat dissipation components; The air-cooling assembly includes two dispersion covers corresponding to the heat dissipation assembly. The inner ends of the two dispersion covers are respectively fixedly connected to a frame. The inner sides of the frames are respectively rotatably connected to a cooling fan. A drive shaft is fixedly connected to the cooling fan coaxially. A drive bevel gear is fixedly connected to the surface of the drive shaft. The two drive bevel gears mesh with each other for transmission. One end of one of the drive shafts is provided with a drive motor. The drive motor is fixedly connected to the frame, and the power output end of the drive motor is fixedly connected to the corresponding drive shaft coaxially.

[0008] Furthermore, the air inlet size of the dispersion hood is smaller than the air outlet size, and multiple evenly distributed air outlets are provided at the air outlet.

[0009] Furthermore, the agitator includes a mounting plate rotatably connected to the lower end of the transformer tank. A mounting rod is fixedly connected to the upper middle part of the mounting plate. Multiple vertically and staggered fixed rods are fixedly connected to the surface of the mounting rod. The outer ends of the multiple fixed rods are jointly fixedly connected to a first spiral blade. The first spiral blade is spirally upward in the direction of guiding oil. The surface of the mounting rod is fixedly connected to a second spiral blade, and its spiral direction is consistent with that of the first spiral blade.

[0010] Furthermore, the air intake assembly includes a plurality of evenly distributed mounting holes located at a non-central position on the surface of the mounting plate. A three-way pipe is fixedly connected to the lower end of each mounting hole. A piston rod that can move up and down is installed at the lower opening of each three-way pipe. A mating block is fixedly connected to the lower end of each piston rod. One-way valves are fixedly connected to the other two openings of each three-way pipe. The lower one-way valve is an air intake one-way valve, and the other one-way valve is an air outlet one-way valve. Under the combined action of the two one-way valves, when the piston rod moves up and down, it injects external gas into the transformer oil tank. One end of the three-way pipe connected to the air intake one-way valve is fixedly connected to an air intake pipe. Multiple conical air hoods are fixedly connected to the inner wall of the air intake pipe, and multiple rectangular openings are opened on the surface of the air intake pipe.

[0011] Furthermore, a push spring is provided between the intake one-way valve and the piston rod. The push spring is sleeved on the upper part of the piston rod, and one end of the push spring abuts against the one-way valve on the upper side, and the other end abuts against the stepped surface of the piston rod. A push assembly for driving its up and down movement is provided on the lower side of the piston rod. A spiral tube is rotatably connected to the upper opening of the mounting hole, and a driven gear is fixedly connected to the lower surface of the spiral tube. An internal gear ring meshes with the outer side of the multiple driven gears, and the internal gear ring is fixedly connected to the inner arm of the transformer tank.

[0012] Furthermore, the pushing assembly includes a base box located on both sides of the lower end of the transformer tank. A base plate is fixedly connected to the surface of the base box, and the base plate is fixedly connected to the bottom of the transformer tank. A plurality of evenly distributed through holes are opened at the upper end of the base box, and each through hole corresponds to a piston rod on the upper side. A plurality of limiting rods corresponding to the through holes are rotatably connected inside the base box. An ejector cylinder is slidably connected to the surface of the limiting rod along the axial direction. A top block is rotatably connected to the upper end of the ejector cylinder. A guide cylinder is sleeved on the surface of the ejector cylinder, and the guide cylinder is fixedly connected to the inner wall of the base box. A spiral guide groove is opened on the surface of the guide cylinder, and a guide pin is fixedly connected to the surface of the ejector cylinder. The guide pin slides in cooperation with the guide groove. When the limiting rod rotates, it drives the ejector cylinder to rotate synchronously. Under the sliding cooperation between the guide pin and the guide groove, the ejector cylinder moves up and down along the axial direction. The bottom box is equipped with a drive structure for controlling the rotation of the limiting rod.

[0013] Furthermore, the drive structure includes a control motor fixedly connected to the bottom of one of the base boxes. A connecting shaft is fixedly connected coaxially to the power output end of the control motor. The connecting shaft is rotatably connected to the base box. A central gear is fixedly connected coaxially to the surface of the connecting shaft. Multiple mating gears mesh with the outer side of the central gear. The mating gears are rotatably connected to the inner wall of the base box. A first pulley is fixedly connected coaxially to the lower end of each mating gear. A second pulley is fixedly connected coaxially to the lower end of each limiting rod. A transmission belt is sleeved between the first pulley and the corresponding second pulley.

[0014] Furthermore, a rotating plate is coaxially fixedly connected to the upper end of the connecting shaft, and a control rod is coaxially fixedly connected to the upper end of the rotating plate. The upper end of the control rod is coaxially fixedly connected to the mounting plate. The surface of the rotating plate is provided with a plurality of evenly distributed mounting grooves along the radial direction. Mounting sliders are slidably connected in the mounting grooves. The upper end of each mounting slider is fixedly connected to a movable arm. The outer end of each mounting slider is fixedly connected to a support spring. The outer end of each support spring is fixedly connected to the inner wall of the mounting groove. The outer end of each movable arm is fixedly connected to a pad. The inner end of each movable arm is hinged to a second hinge rod. The inner end of each second hinge rod is hinged to a first hinge rod. The end of the first hinge rod away from the second hinge rod is hinged to a non-central position of the rotating plate. When the rotating plate rotates, under the action of centrifugal force, the pad is positioned between the top block and the mating block.

[0015] This invention features a novel structure, ingenious design, and simple and convenient operation, offering the following advantages compared to existing technologies: 1. This application utilizes a layered heat dissipation oil channel design to evenly distribute cooling oil to each heat dissipation diaphragm, significantly increasing the heat exchange area and avoiding heat dissipation bottlenecks caused by concentrated flow in a single channel. Combined with the curved structure of the heat dissipation diaphragms, this not only expands the contact area with air but also guides airflow smoothly, reducing vortex dead zones and enhancing heat exchange efficiency. Simultaneously, the air-cooled components and heat dissipation components are arranged diagonally, directionally blowing onto the heat dissipation diaphragms to achieve synergistic heat dissipation from liquid cooling and air cooling, further improving the heat dissipation rate. 2. By agitating the first and second spiral blades of the agitator, the cooling oil is pushed to form a circulating convection at normal speed, ensuring that the cooling oil evenly covers the windings, iron core and other heat-generating components, and fully absorbs heat; when the oil temperature exceeds the standard, the spiral bubbles sprayed by the intake assembly cause the cooling oil to be violently disturbed, and can carry some heat, breaking the laminar flow state, avoiding local heat accumulation, ensuring that the temperature of each area in the oil tank is balanced, and improving the heat dissipation effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0017] Figure 2 This is a schematic diagram of the heat dissipation component structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0018] Figure 3 This is a schematic diagram of the air-cooling component structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0019] Figure 4 This is a schematic diagram of the agitator installation structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0020] Figure 5 This is a schematic diagram of the agitator structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0021] Figure 6 This is a first schematic diagram of the pad mounting structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0022] Figure 7 This is a second schematic diagram of the pad mounting structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0023] Figure 8This is a schematic diagram of the drive structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0024] Figure 9 This is a schematic diagram of the top-mounted cylinder installation structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0025] Figure 10 This is a schematic diagram of the air intake assembly structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0026] Figure 11 This is a schematic diagram of the pad structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0027] Figure 12 This is a schematic diagram of the top-out cylinder structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0028] Figure 13 This is a schematic diagram of the conical fan cover installation structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0029] Figure 14 This is a schematic diagram of the spiral tube drive structure of a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to the present invention.

[0030] Numbering in the diagram: 1-Transformer oil tank, 2-Oil outlet pipe, 3-Dispersion pipe, 4-Heat dissipation diaphragm, 5-Dispersion cover, 6-Frame, 7-Drive motor, 8-Air outlet, 9-Cooling fan, 10-Drive shaft, 11-Drive bevel gear, 12-Mounting slot, 13-Base plate, 14-Base box, 15-Rotating plate, 16-Control lever, 17-Moving arm, 18-Support spring, 19-Padded block, 20-First hinge rod, 21-Second hinge rod, 22-Control motor, 23-Connecting shaft, 24-Center gear, 25-Matching gear, 26-First pulley, 27-... 28-Limit rod, 29-Top tube, 30-Guide tube, 31-Guide groove, 32-Guide pin, 33-Top block, 34-T-connector, 35-Piston rod, 36-Matching block, 37-Push spring, 38-Valve body, 39-Reset spring, 40-Valve core, 41-Inlet pipe, 42-Conical shroud, 43-Rectangular opening, 44-Internal gear ring, 45-Driven gear, 46-Spiral tube, 47-Mounting rod, 48-First spiral blade, 49-Fixing rod, 50-Second spiral blade, 51-Through hole, 52-Mounting plate, 53-Outlet valve. Detailed Implementation

[0031] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figure 1-12 As shown, the present invention provides a high-efficiency oil-immersed power transformer with layered heat dissipation oil channels, including a transformer tank 1. Heat dissipation components are respectively installed on two diagonally opposite sides of the outer side of the transformer tank 1. The heat dissipation components include multiple oil outlet pipes 2 that are fixedly connected and connected to the upper and lower sides of the outer end of the transformer tank 1. Multiple dispersion pipes 3 are fixedly connected and connected to the surface of the oil outlet pipes 2 along the axial direction. Heat dissipation films 4 are fixedly connected and connected between the upper and lower corresponding layers of dispersion pipes 3, forming layered heat dissipation oil channels. The layered heat dissipation oil channels are arranged in layers along the oil outlet pipe 2, so that the hot oil in the transformer oil tank 1 can be evenly distributed to each layer of heat dissipation film 4, avoiding the heat dissipation bottleneck caused by the concentrated flow of a single oil channel. At the same time, the multiple layers of heat dissipation film 4 exchange heat with the air simultaneously, greatly increasing the heat exchange area and improving the heat dissipation efficiency. Each layer of distribution pipe 3 is independently connected to the oil outlet pipe 2 to ensure stable oil pressure in each layer of oil channel and avoid interlayer crossflow affecting the heat dissipation effect.

[0033] The transformer oil tank 1 has two rotatably connected agitator plates on both sides of its lower end. When the agitator plates rotate at normal speed, they drive the cooling oil to flow. An air intake assembly is installed on the lower side of the agitator plates, and the air outlet of the air intake assembly is located on the agitator plates. When the agitator plates rotate rapidly, the air intake assembly sprays air into the transformer oil tank 1. A temperature sensor is fixedly installed inside the transformer oil tank 1. The temperature sensor is electrically connected to the control motor 22 and is used to detect the temperature of the cooling oil in the tank in real time and provide feedback signals. The rotational power of the agitator is transmitted through the drive structure. At normal speed, the rotation of the spiral blade generates axial thrust, which pushes the cooling oil at the bottom to flow upward, forming a circulating convection, so that the cooling oil evenly covers the windings, iron core and other heat-generating components and fully absorbs heat. When the temperature sensor detects that the oil temperature exceeds the preset threshold, the control motor 22 speeds up, driving the agitator to switch to a fast rotation mode. The air intake component starts jetting at the same time. When the bubbles rise, they cause the cooling oil to turbulent, enhancing the heat dissipation effect and achieving dual coordinated heat dissipation of "oil-driven and air-driven agitation". An air outlet valve 53 is installed at the upper end of the transformer oil tank 1 for depressurizing the transformer oil tank 1.

[0034] Furthermore, the heat dissipation film 4 has a hollow curved surface structure; The curved structure design makes the outer surface of the heat dissipation diaphragm 4 convex in an arc shape. Compared with the planar structure, this not only improves the structural strength of the diaphragm itself, but also increases the contact area with the air. At the same time, the arc-shaped surface can guide the airflow to flow smoothly along the diaphragm surface, reduce airflow resistance, avoid the generation of vortex dead zones, and ensure that the heat on the surface of the heat dissipation diaphragm 4 is quickly removed. The internal hollow structure allows the cooling oil to fill the diaphragm cavity and efficiently transfer heat to the outside through the diaphragm wall, thereby enhancing the heat exchange efficiency.

[0035] Furthermore, air-cooling components are installed diagonally between the two heat dissipation components; The air-cooling assembly includes two dispersion covers 5 corresponding to the heat dissipation assembly. The inner ends of the two dispersion covers 5 are respectively fixedly connected to a frame 6. The inner sides of the frame 6 are respectively rotatably connected to a cooling fan 9. A drive shaft 10 is coaxially fixedly connected to the cooling fan 9. A drive bevel gear 11 is fixedly connected to the surface of the drive shaft 10. The two drive bevel gears 11 mesh with each other for transmission. One end of one of the drive shafts 10 is provided with a drive motor 7. The drive motor 7 is fixedly connected to the frame 6, and the power output end of the drive motor 7 is coaxially fixedly connected to the corresponding drive shaft 10. The air-cooling component and the heat dissipation component are arranged diagonally, so that the airflow generated by the cooling fan 9 can be directly and directionally blown onto the heat dissipation film 4 and the dispersion tube 3 to achieve targeted heat dissipation. After the drive motor 7 starts, it drives one of the transmission bevel gears 11 to rotate through the transmission shaft 10. With the meshing transmission of the two bevel gears, it drives the other transmission shaft 10 and the cooling fan 9 to rotate synchronously in opposite directions, forming a symmetrical airflow field. The airflow is gathered by the dispersion cover 5 and blown onto the heat dissipation component to ensure that each layer of heat dissipation film 4 can be evenly blown, improving the synergistic heat dissipation effect of air cooling and liquid cooling. The frame 6 provides installation support for the fan and the transmission shaft 10, while reducing airflow leakage and improving airflow utilization.

[0036] Furthermore, the air inlet size of the dispersion hood 5 is smaller than the air outlet size, and multiple evenly distributed air outlets 8 are provided at the air outlet. The structure with a small air inlet and a large air outlet creates a wind gathering and expanding effect. The smaller air inlet increases the flow rate of outside air when it enters, enhancing the airflow impact force. The larger air outlet and multiple uniform air outlets 8 disperse the high-speed airflow into multiple uniform airflows, each corresponding to different areas of the heat dissipation component. This avoids uneven heat dissipation caused by concentrated airflow impact and ensures that all layered heat dissipation films 4 and dispersion tubes 3 can obtain sufficient cooling airflow.

[0037] Furthermore, the agitator includes a mounting plate 52 rotatably connected to the lower end of the transformer oil tank 1. A mounting rod 47 is fixedly connected to the middle of the upper end of the mounting plate 52. A plurality of vertical and staggered fixed rods 49 are fixedly connected to the surface of the mounting rod 47. The outer ends of the plurality of fixed rods 49 are fixedly connected to a first spiral blade 48. The first spiral blade 48 is spirally upward in the direction of guiding oil. The surface of the mounting rod 47 is fixedly connected to a second spiral blade 50, and its spiral direction is consistent with that of the first spiral blade 48. Mounting plate 52 serves as the core mounting base for the agitator plate, transmitting power through a fixed connection with control rod 16. The fixed rods 49 are vertically staggered, firmly connecting the two spiral blades and assisting in stirring the cooling oil, breaking the laminar flow. The first spiral blade 48, located at the outer end of the fixed rod 49, generates a strong axial thrust in its upward spiral direction, pushing the bottom cooling oil towards the upper part of the oil tank. The second spiral blade 50, located between mounting rod 47 and the first spiral blade 48, synchronously guides the cooling oil in the middle, ensuring smoother and more uniform flow, preventing excessively fast or stagnant flow in certain areas, and ensuring the circulation efficiency of the cooling oil throughout the oil tank.

[0038] Furthermore, the air intake assembly includes a plurality of evenly distributed mounting holes located at a non-central position on the surface of the mounting plate 52. The lower ends of the mounting holes are respectively fixedly connected to a three-way pipe 34. The lower opening of the three-way pipe 34 is respectively installed with a piston rod 35 that can move up and down. The lower end of the piston rod 35 is fixedly connected to a mating block 36. The other two openings of the three-way pipe 34 are respectively fixedly connected to a one-way valve. The one-way valve on the lower side is an air intake one-way valve, and the other one-way valve is an air outlet one-way valve. Under the combined action of the two one-way valves, when the piston rod 35 moves up and down, it injects external gas into the transformer oil tank 1. The one-way valve includes a valve body 38 that is fixedly connected to the opening of the three-way pipe 34. The valve body 38 is hollow inside and open at both ends. One end is fitted with a valve core 40. The other end of the valve core 40 is fixedly connected to a return spring 39. The other end of the return spring 39 is fixedly connected to the inner wall of the valve body 38. The mounting hole is located at a non-central position on the mounting plate 52, allowing the intake assembly to rotate synchronously with the mounting plate 52, utilizing centrifugal force to assist in gas intake. The three-way pipe 34 connects the mounting hole, piston rod 35, and two one-way valves, forming a complete gas flow channel. The valve body 38 of the one-way valve provides the mounting base, and the return spring 39 provides power for the valve core 40 to return, ensuring one-way conduction function: when the piston rod 35 moves upward, a negative pressure is formed inside the three-way pipe 34, the valve core 40 of the intake one-way valve is drawn open, and the exhaust one-way valve is closed, allowing external gas to be drawn in through the intake one-way valve; when the piston rod 35 moves downward, the pressure inside the three-way pipe 34 increases, the intake one-way valve closes, and the valve core 40 of the exhaust one-way valve is pushed open, allowing gas to be injected into the oil tank through the mounting hole. Multiple intake assemblies are evenly distributed to ensure that gas is evenly diffused to all areas of the oil tank, enhancing the cooling oil disturbance effect.

[0039] One end of the three-way pipe 34 connected to the air intake one-way valve is fixedly connected to an air intake pipe 41. Multiple conical air hoods 42 are fixedly connected to the inner wall of the air intake pipe 41. Multiple rectangular openings 43 are opened on the surface of the air intake pipe 41. The air inlet duct 41 provides a channel for external air to enter the three-way duct 34. The conical hood 42 on the inner wall is tapered, which can gather airflow, increase the air intake speed, and enhance the intake efficiency. The rectangular openings 43 on the surface of the air inlet duct 41 are used to expand the air intake area to ensure sufficient air supply and avoid affecting the jet effect due to insufficient air intake. At the same time, the distribution design of the rectangular openings 43 can prevent debris from entering the pipe and play a preliminary filtering role.

[0040] Furthermore, a push spring 37 is provided between the intake one-way valve and the piston rod 35. The push spring 37 is sleeved on the upper part of the piston rod 35, and one end of the push spring 37 abuts against the one-way valve on the upper side, and the other end abuts against the stepped surface of the piston rod 35. A push assembly for driving its up and down movement is provided on the lower side of the piston rod 35. The push spring 37 is in a pre-compressed state, and its elastic force always acts on the stepped surface of the piston rod 35, providing power for the piston rod 35 to reset. When the push assembly pushes the mating block 36 and the piston rod 35 upward, the push spring 37 is further compressed. When the push force of the push assembly disappears, the elastic force of the push spring 37 is released, pushing the piston rod 35 downward to achieve automatic reset, ensuring that the intake assembly continuously and stably performs the intake and exhaust cycle. The push spring 37 is sleeved on the upper part of the piston rod 35, which not only ensures that the spring extension direction is consistent with the piston rod 35 movement direction, but also guides the movement of the piston rod 35 to avoid tilting and jamming.

[0041] A spiral tube 46 is rotatably connected to the upper opening of the mounting hole. A driven gear 45 is fixedly connected to the lower side of the surface of the spiral tube 46. An internal gear ring 44 meshes with the outer side of the multiple driven gears 45. The internal gear ring 44 is fixedly connected to the inner arm of the transformer oil tank 1. The spiral tube 46 is fixed to the upper end of the mounting hole, causing the ejected gas to diffuse in a spiral shape, enhancing the range and force of disturbance to the cooling oil and improving the heat dissipation effect. When the mounting plate 52 rotates, it drives the spiral tube 46 to rotate synchronously. The driven gear 45 on the spiral tube 46 meshes with the fixed internal gear ring 44. With the help of gear transmission, the spiral tube 46 rotates on its own, further enhancing the spiral diffusion effect of the gas and allowing the gas to be evenly distributed inside the oil tank, avoiding local gas accumulation.

[0042] Furthermore, the pushing assembly includes a base box 14 located on both sides of the lower end of the transformer tank 1. A base plate 13 is fixedly connected to the surface of the base box 14, and the base plate 13 is fixedly connected to the bottom of the transformer tank 1. A plurality of evenly distributed through holes 51 are opened at the upper end of the base box 14. Each through hole 51 corresponds to a piston rod 35 on the upper side. A plurality of limiting rods 28 corresponding to the through holes 51 are rotatably connected inside the base box 14. An ejector cylinder 29 is slidably connected to the surface of the limiting rod 28 along the axial direction. A top block 33 is rotatably connected to the upper end of the ejector cylinder 29. A guide cylinder 30 is sleeved on the surface of the ejector cylinder 29. The guide cylinder 30 is fixedly connected to the inner wall of the base box 14. A spiral guide groove 31 is opened on the surface of the guide cylinder 30. A guide pin 32 is fixedly connected to the surface of the ejector cylinder 29. The guide pin 32 and the guide groove 31 are slidably engaged. When the limiting rod 28 rotates, it drives the ejector cylinder 29 to rotate synchronously. Under the sliding cooperation between the guide pin 32 and the guide groove 31, the ejector cylinder 29 moves up and down along the axial direction. The bottom box 14 is equipped with a drive structure for controlling the rotation of the limiting rod 28. The base plate 13 serves to fix the base box 14 and the transformer oil tank 1, improving the installation stability of the push assembly; the through hole 51 provides a channel for the contact between the top block 33 and the mating block 36, ensuring that the up-and-down movement of the ejector cylinder 29 can be accurately transmitted to the piston rod 35; the limit rod 28 is axially slidably connected to the ejector cylinder 29, so that when the limit rod 28 rotates, it can drive the ejector cylinder 29 to rotate synchronously without affecting its axial movement; the guide cylinder 30 is fixed, and the spiral guide groove 31 on its surface provides a sliding trajectory for the guide pin 32. When the ejector cylinder 29 rotates with the limit rod 28, the guide pin 32 slides along the guide groove 31, and the spiral guide groove 31 generates an axial force, converting the rotational power into the reciprocating linear motion of the ejector cylinder 29, providing a stable thrust for the up-and-down movement of the piston rod 35.

[0043] Furthermore, the drive structure includes a control motor 22 fixedly connected to the bottom of one of the base boxes 14. A connecting shaft 23 is fixedly connected coaxially to the power output end of the control motor 22. The connecting shaft 23 is rotatably connected to the base box 14. A central gear 24 is fixedly connected coaxially to the surface of the connecting shaft 23. Multiple mating gears 25 mesh with the outer side of the central gear 24. The mating gears 25 are rotatably connected to the inner wall of the base box 14. A first pulley 26 is fixedly connected coaxially to the lower end of each mating gear 25. A second pulley 27 is fixedly connected coaxially to the lower end of each limiting rod 28. A transmission belt is sleeved between the first pulley 26 and the corresponding second pulley 27. The control motor 22 serves as the power source for the drive structure, and its speed is regulated by a feedback signal from a temperature sensor. When the oil temperature is below a preset threshold, the control motor 22 operates at low speed, and the drive structure drives the agitator to rotate at a normal speed, with heat dissipation achieved solely through the circulation of cooling oil. When the oil temperature exceeds the preset threshold, the temperature sensor sends a signal to accelerate the control motor 22, causing the agitator to rotate rapidly and activating the air intake assembly. After the control motor 22 is activated, it drives the central gear 24 to rotate via the connecting shaft 23. The central gear 24 meshes with multiple mating gears 25, causing all mating gears 25 to rotate synchronously. The mating gears 25, through the transmission of the first pulley 26, the transmission belt, and the second pulley 27, drive multiple limit rods 28 to rotate synchronously, ensuring that all ejector cylinders 29 move in unison, thereby enabling multiple air intake assemblies to eject air synchronously.

[0044] Furthermore, a rotating plate 15 is coaxially fixedly connected to the upper end of the connecting shaft 23, and a control rod 16 is coaxially fixedly connected to the upper end of the rotating plate 15. The upper end of the control rod 16 is coaxially fixedly connected to the mounting plate 52. When the connecting shaft 23 rotates, it synchronously drives the rotating plate 15 and the control rod 16 to rotate. The control rod 16 transmits power to the mounting plate 52, realizing the linkage between the drive structure and the agitator, ensuring that the rotation speed of the agitator is synchronously adjusted with the speed of the control motor 22, so that the heat dissipation system can adaptively adjust the heat dissipation efficiency according to the oil temperature.

[0045] The surface of the rotating plate 15 is provided with a plurality of evenly distributed mounting grooves along the radial direction. Mounting sliders are slidably connected in the mounting grooves. The upper end of the mounting slider is fixedly connected to a movable arm 17. The outer end of the mounting slider is fixedly connected to a support spring 18. The outer end of the support spring 18 is fixedly connected to the inner wall of the mounting groove. The outer end of the movable arm 17 is fixedly connected to a pad 19. The inner end of the movable arm 17 is hinged to a second hinge rod 21. The inner end of the second hinge rod 21 is hinged to a first hinge rod 20. The end of the first hinge rod 20 away from the second hinge rod 21 is hinged to a non-central position of the rotating plate 15. When the rotating plate 15 rotates, under the action of centrifugal force, the mounting slider moves outward along the mounting groove, driving the pad 19 to move outward synchronously, so that the pad 19 is located between the top block 33 and the mating block 36. When the top block 33 moves up and down, it pushes the mating block 36 and the piston rod 35 to move through the pad 19. The mounting groove provides a sliding guide for the mounting slider. The support spring 18 is initially in its natural extended state, which limits the mounting slider. When the rotating plate 15 rotates with the connecting shaft 23, the mounting slider, the moving arm 17 and other components rotate synchronously to generate centrifugal force. When the centrifugal force is greater than the elastic force of the support spring 18, the mounting slider moves outward along the groove, driving the pad 19 to move between the top block 33 and the mating block 36, forming a power transmission intermediate. The hinged engagement of the first hinge rod 20 and the second hinge rod 21 restricts the movement trajectory of the moving arm 17, ensuring that the pad 19 is smoothly connected. When the ejector cylinder 29 drives the top block 33 to move upward, it pushes the mating block 36 and the piston rod 35 to move upward through the pad 19. When the top block 33 moves downward, it pushes the spring 37 to drive the piston rod 35, the mating block 36 and the pad 19 to reset synchronously, realizing the reciprocating motion of the piston rod 35. The centrifugal force controlled clutch structure ensures that the air intake component is activated only when the agitator reaches the set speed, realizing on-demand heat dissipation and improving energy utilization efficiency.

[0046] During transformer operation, the heat generated by the windings and core is absorbed by the cooling oil in the tank. The cooling oil is diverted through the diagonally arranged oil outlet pipes 2 on the outside of the tank to the axially layered dispersion pipes 3, and finally flows into the hollow curved heat dissipation film 4. The heat exchange area is expanded through the multi-layered heat dissipation oil channels, transferring heat to the outside. At the same time, the drive motor 7 of the air-cooled component drives two cooling fans 9 to rotate in opposite directions through the transmission bevel gear 11. The airflow is gathered through the dispersion cover 5 with a small air inlet and a large air outlet, and then blown directionally from the evenly distributed air outlets 8 onto the heat dissipation film 4, enhancing the synergistic heat dissipation effect of liquid cooling and air cooling.

[0047] The agitator at the lower end of the oil tank is driven by the drive structure. At normal speed, the first spiral blade 48 and the second spiral blade 50 on the mounting rod 47 spiral upward to guide the oil, pushing the cooling oil to form a circulating convection to ensure that the heat is absorbed evenly. When the temperature sensor in the oil tank detects that the oil temperature exceeds the standard, the motor 22 is controlled to speed up and the agitator switches to a fast rotation mode. At this time, the centrifugal force of the rotating plate 15 causes the mounting slider to move the pad 19 to the space between the top block 33 and the mating block 36. The drive structure drives the limit rod 28 to rotate. Through the cooperation of the guide groove 31 and the guide pin 32, the ejector cylinder 29 drives the piston rod 35 to move up and down reciprocally. Under the action of the one-way valves on both sides of the three-way pipe 34, the outside gas is drawn in through the air inlet pipe 41 with the conical wind shroud 42, and then spirally ejected through the spiral pipe 46 at the top of the mounting hole. The rising bubbles further disturb the cooling oil and take away some heat. The overheated gas is finally discharged and depressurized through the air outlet valve 53 at the top of the oil tank. The heat dissipation intensity is adjusted as needed throughout the process to ensure the stable operation of the transformer.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them.

Claims

1. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels, comprising a transformer oil tank (1), characterized in that, The transformer tank (1) is equipped with heat dissipation components on two diagonally opposite sides of its outer side. The heat dissipation components include multiple oil outlet pipes (2) that are fixedly connected and connected to the upper and lower sides of the outer end of the transformer tank (1). The surface of the oil outlet pipes (2) is fixedly connected in layers along the axial direction and connected to multiple dispersion pipes (3). The dispersion pipes (3) in the upper and lower corresponding layers are fixedly connected and connected to heat dissipation films (4) to form layered heat dissipation oil channels. The transformer oil tank (1) has two rotatably connected agitators on both sides of its lower end. When the agitators rotate at normal speed, they drive the cooling oil to flow. An air intake assembly is installed on the lower side of the agitators. The air outlet of the air intake assembly is located on the agitators. When the agitators rotate rapidly, the air intake assembly sprays air into the transformer oil tank (1).

2. The high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 1, characterized in that, The heat dissipation film (4) has a hollow curved surface structure.

3. The high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 2, characterized in that, Air-cooling components are installed at opposite corners of the two heat dissipation components; The air-cooling assembly includes two dispersion covers (5) corresponding to the heat dissipation assembly. The inner ends of the two dispersion covers (5) are respectively fixedly connected to a frame (6). The inner side of the frame (6) is respectively rotatably connected to a cooling fan (9). A drive shaft (10) is coaxially fixedly connected to the cooling fan (9). A drive bevel gear (11) is fixedly connected to the surface of the drive shaft (10). The two drive bevel gears (11) mesh with each other for transmission. One end of one of the drive shafts (10) is provided with a drive motor (7). The drive motor (7) is fixedly connected to the frame (6), and the power output end of the drive motor (7) is coaxially fixedly connected to the corresponding drive shaft (10).

4. The high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 3, characterized in that, The size of the air inlet of the dispersion hood (5) is smaller than the size of the air outlet, and multiple evenly distributed air outlets (8) are provided at the air outlet.

5. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 1, characterized in that, The agitator includes a mounting plate (52) rotatably connected to the lower end of the transformer oil tank (1). A mounting rod (47) is fixedly connected to the middle of the upper end of the mounting plate (52). Multiple vertical and staggered fixed rods (49) are fixedly connected to the surface of the mounting rod (47). The outer ends of the multiple fixed rods (49) are fixedly connected to a first spiral blade (48). The first spiral blade (48) is spirally upward in the direction of guiding oil. The surface of the mounting rod (47) is fixedly connected to a second spiral blade (50), and its spiral direction is consistent with that of the first spiral blade (48).

6. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 5, characterized in that, The air intake assembly includes a plurality of uniformly distributed mounting holes located at a non-central position on the surface of the mounting plate (52). The lower ends of the mounting holes are respectively fixedly connected to a three-way pipe (34). The lower opening of the three-way pipe (34) is respectively installed with a piston rod (35) that can move up and down. The lower end of the piston rod (35) is fixedly connected to a mating block (36). The other two openings of the three-way pipe (34) are respectively fixedly connected to a one-way valve. The one-way valve on the lower side is an air intake one-way valve, and the other one-way valve is an air outlet one-way valve. Under the combined action of the two one-way valves, when the piston rod (35) moves up and down, it injects external gas into the transformer oil tank (1). One end of the three-way pipe (34) connected to the one-way valve of the air intake is fixedly connected to the air intake pipe (41). The inner wall of the air intake pipe (41) is fixedly connected to multiple conical wind shields (42). Multiple rectangular openings (43) are opened on the surface of the air intake pipe (41).

7. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 6, characterized in that, A push spring (37) is provided between the intake one-way valve and the piston rod (35). The push spring (37) is sleeved on the upper part of the piston rod (35), and one end of the push spring (37) abuts against the one-way valve on the upper side, and the other end abuts against the stepped surface of the piston rod (35). A push assembly for driving it to move up and down is provided on the lower side of the piston rod (35). A spiral tube (46) is rotatably connected to the upper opening of the mounting hole. A driven gear (45) is fixedly connected to the lower side of the surface of the spiral tube (46). An internal gear ring (44) meshes with the outer side of the multiple driven gears (45). The internal gear ring (44) is fixedly connected to the inner arm of the transformer oil tank (1).

8. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 7, characterized in that, The pushing assembly includes a base box (14) located on both sides of the lower end of the transformer tank (1). A base plate (13) is fixedly connected to the surface of the base box (14). The base plate (13) is fixedly connected to the bottom of the transformer tank (1). A plurality of evenly distributed through holes (51) are opened at the upper end of the base box (14). Each through hole (51) corresponds to a piston rod (35) on the upper side. A plurality of limiting rods (28) corresponding to the through holes (51) are rotatably connected inside the base box (14). The surface of the limiting rod (28) is axially slidably connected to an ejector cylinder (29), and the upper end of the ejector cylinder (29) is rotatably connected to a top block (33). The surface of the ejector cylinder (29) is fitted with a guide cylinder (30), which is fixedly connected to the inner wall of the bottom box (14). The surface of the guide cylinder (30) is provided with a spiral guide groove (31), and the surface of the ejector cylinder (29) is fixedly connected to a guide pin (32). The guide pin (32) and the guide groove (31) are slidably engaged. When the limiting rod (28) rotates, it drives the ejector cylinder (29) to rotate synchronously. Under the sliding cooperation of the guide pin (32) and the guide groove (31), the ejector cylinder (29) moves up and down along the axial direction. The bottom box (14) is equipped with a drive structure for controlling the rotation of the limiting rod (28).

9. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 8, characterized in that, The drive structure includes a control motor (22) fixedly connected to the bottom of one of the base boxes (14). A connecting shaft (23) is fixedly connected to the power output end of the control motor (22) on the same axis. The connecting shaft (23) is rotatably connected to the base box (14). A central gear (24) is fixedly connected to the surface of the connecting shaft (23) on the same axis. Multiple mating gears (25) mesh with the outer side of the central gear (24). The mating gears (25) are rotatably connected to the inner wall of the base box (14). A first pulley (26) is fixedly connected to the lower end of each mating gear (25) on the same axis. A second pulley (27) is fixedly connected to the lower end of each limiting rod (28) on the same axis. A transmission belt is sleeved between the first pulley (26) and the corresponding second pulley (27).

10. A high-efficiency oil-immersed power transformer with layered heat dissipation oil channels according to claim 9, characterized in that, The upper end of the connecting shaft (23) is coaxially fixedly connected to a rotating plate (15), and the upper end of the rotating plate (15) is coaxially fixedly connected to a control rod (16). The upper end of the control rod (16) is coaxially fixedly connected to the mounting plate (52). The surface of the rotating plate (15) is provided with a plurality of uniformly distributed mounting grooves along the radial direction. Mounting sliders are slidably connected in the mounting grooves. The upper end of the mounting sliders is fixedly connected to a movable arm (17). The outer end of the mounting sliders is fixedly connected to a support spring (18). The outer end of the support spring (18) is fixedly connected to the inner wall of the mounting groove. The outer end of the movable arm (17) is fixedly connected to a pad (19). The inner end of the movable arm (17) is hinged to a second hinge rod (21). The inner end of the second hinge rod (21) is hinged to a first hinge rod (20). The end of the first hinge rod (20) away from the second hinge rod (21) is hinged to a non-center position of the rotating plate (15). When the rotating plate (15) rotates, under the action of centrifugal force, the pad (19) is positioned between the top block (33) and the mating block (36).

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