New energy oil-immersed transformer

Abstract

This application discloses a new energy oil-immersed transformer, relating to the field of oil-immersed transformer technology. It includes a main body, with an oil storage tank connected to the top of the main body via a pipe. Multiple oil inlet pipes and oil outlet pipes are evenly spaced on both sides of the main body. Heat sinks are fixed between the oil inlet pipes and oil outlet pipes. An oil inlet channel is located at the top of the oil outlet pipe, and an oil outlet channel is located at the bottom of the oil outlet pipe. Multiple branch channels are evenly spaced between the oil inlet and oil outlet channels. A flow regulating component is installed inside the oil inlet plate, and a unidirectional flow component is installed inside the oil outlet plate. During forward flow, the oil pressure in the branch channels pushes a piston downwards, compressing a spring, and the oil outlet opens normally. During reverse flow, the reverse oil pressure in the oil outlet channel pushes the piston upwards, causing the conical surface to tightly adhere to the sealing surface, completely blocking the oil outlet. This prevents the cold oil from flowing back into the branch channels under strong vibration conditions, avoiding the short-circuit problem caused by the cooling oil mixing with the high-temperature inlet oil, which reduces the heat exchange temperature difference.

Description

Technical Field

[0001] This invention relates to the field of oil-immersed transformer technology, specifically to a new energy oil-immersed transformer. Background Technology

[0002] New energy oil-immersed transformers are specialized step-up power equipment adapted to intermittent new energy power generation scenarios such as photovoltaic and wind power. They are the core hub devices for connecting new energy power to the public power grid. Based on the law of electromagnetic induction, they realize voltage level conversion. The core magnetic and conductive components such as the iron core and windings are all immersed in the insulating oil in the sealed oil tank. The insulating oil simultaneously undertakes the dual functions of electrical insulation and heat conduction. Through natural convection of the oil, the operating heat loss of the windings and iron core is transferred to the external heat dissipation fins and finally dissipated into the external environment.

[0003] However, when the load of an existing oil-immersed transformer increases suddenly, the buoyancy of the natural oil circulation increases rapidly with the oil temperature, causing the oil flow rate to surge spontaneously and the flow velocity to become too fast. Since the heat sink has a multi-branch parallel structure, the flow rate is overloaded, and the oil flows back to the oil tank quickly before it has completed sufficient heat exchange with the air in the flow channel, forming a hot oil short circuit. Most of the heat exchange potential of the heat sink is not utilized, and the overall heat dissipation efficiency decreases instead of increasing. The winding hot spot temperature is difficult to control effectively. Moreover, when the load increases suddenly, the transformer body vibration intensifies. The high-frequency vibration will cause turbulent pulsation in the oil inside the tube, causing the cold oil at the bottom and the hot oil at the top to mix extensively. This leads to an increase in the winding oil inlet temperature, a reduction in the heat exchange temperature difference between the winding and the oil, a direct decrease in the internal heat dissipation capacity, and a rapid rise in the winding hot spot temperature. Summary of the Invention

[0004] The purpose of this invention is to provide a new energy oil-immersed transformer to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: A new energy oil-immersed transformer includes a main body. An oil storage tank is connected to the top of the main body via a pipe. Multiple oil inlet pipes and oil outlet pipes are evenly spaced on both sides of the main body. Heat sinks are fixed between the oil inlet pipes and oil outlet pipes. A fan is fixed to the bottom of the oil outlet pipe, and the fan cools the oil inside the heat sinks. An oil inlet channel is located at the top of the oil outlet pipe, and an oil outlet channel is located at the bottom of the oil outlet pipe. Multiple branch channels are evenly spaced between the oil inlet and oil outlet channels. Baffles and fixing plates are fixed to the inner walls of the branch channels. An oil inlet plate is located at the connection between the oil inlet channel and the branch channels. A flow regulating component is located inside the oil inlet plate. An opening and closing plate is fixed to the top of the flow regulating component, and the flow regulating component adjusts the oil inlet volume. An oil outlet plate is located at the connection between the branch channels and the oil outlet channels. A one-way flow component is located inside the oil outlet plate, and the one-way flow component prevents oil backflow.

[0005] Preferably, the oil inlet plate has multiple oil inlets symmetrically arranged, the oil outlet plate has an oil outlet arranged, the branch channel is divided into left and right channels by a fixing plate, and the bottom end of the fixing plate has an inclined surface to facilitate oil flow.

[0006] Preferably, the baffles are symmetrically distributed at equal intervals on the inner wall of the branch channel, and the baffles are inclined, and the oil inlet plate is slidably connected to the opening and closing plate.

[0007] Preferably, the flow regulating component includes a push block disposed within a fixed plate, a movable block symmetrically slidably connected to the push block, a connecting plate fixed to one side of the movable block, a reset spring disposed between the two connecting plates, and the top of the connecting plate fixedly connected to an opening and closing plate.

[0008] Preferably, the fixed plate has a cavity that moves to accommodate the connecting plate, the connecting plate and the opening and closing plate. The contact surfaces of the push block and the moving block are both inclined surfaces. When the push block moves in the vertical direction, it drives the moving block to slide in the horizontal direction through the inclined surfaces.

[0009] Preferably, the unidirectional flow assembly includes a piston disposed within the oil outlet plate, a compression spring disposed at the bottom end of the piston, a connecting rod fixed at the top end of the compression spring, and the connecting rod being fixedly connected to the push block.

[0010] Preferably, the oil outlet plate has a cavity that cooperates with the piston's movement, the piston is frustoconical, and the conical surface of the piston is in close contact with the inner wall of the cavity in the oil outlet plate, and the fixing plate has a cavity that cooperates with the connecting rod's movement.

[0011] Preferably, a compression spring is provided inside the cavity of the oil outlet plate, one end of the compression spring is fixedly connected to the inner wall of the cavity, and the other end of the compression spring is fixedly connected to the piston.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. When the flow is forward, the oil pressure in the branch channel pushes the piston downward to compress the spring, and the oil outlet opens normally. When the flow is reverse, the reverse oil pressure in the oil outlet channel pushes the piston upward, and the conical surface fits tightly with the sealing surface, completely blocking the oil outlet. This blocks the path of cold oil flowing back to the branch channel under strong vibration conditions, avoiding the problem of heat dissipation short circuit caused by the mixing of cooled oil and high-temperature inlet oil, which reduces the heat exchange temperature difference. This ensures that the cooled oil flows back stably to the bottom of the oil tank, maintaining the temperature stratification of the bottom and top of the oil tank, ensuring that the winding oil inlet temperature is always at a low level, improving the internal heat dissipation effect of the winding, and reducing the temperature of the winding hot spots.

[0013] 2. The inclined plane drive drives the moving block, connecting plate, and opening and closing plate to move horizontally, gradually reducing the flow area of ​​the oil inlet. The greater the oil flow, the greater the downward displacement of the piston and the smaller the opening of the oil inlet. When the flow decreases, the return spring drives each component to return, and the opening automatically increases. The oil flow speed is automatically adjusted according to the load size. The greater the load and the more severe the heat generation, the greater the narrowing of the opening. The oil speed is stably controlled within the optimal heat exchange range and the safety threshold. The maximum flow rate of the oil is controlled by throttling, avoiding the generation of a large amount of static charge by the friction between the high-speed oil flow and the pipe wall and insulating parts. This reduces the risk of electrostatic discharge at the winding end and reduces insulation degradation. It is especially suitable for the rapid ramp-up conditions of new energy loads and can reduce the risk of electrostatic faults.

[0014] 3. Through a hierarchical flow channel layout consisting of a top oil inlet channel, multiple sets of equally spaced parallel branch channels, and a bottom oil outlet channel, each branch channel is equipped with multiple staggered and inclined baffles, which bend the straight channel into a serpentine path. The baffles and the side walls of the flow channels are at a fixed angle. On the one hand, the inclined baffles extend the actual travel and residence time of the oil flow, ensuring sufficient heat exchange between the oil and the pipe wall and significantly reducing the oil outlet temperature. On the other hand, the baffles break the laminar boundary layer on the pipe wall surface through turbulence, improve the convective heat transfer coefficient on the oil side, further enhance the heat transfer effect of a single branch, and the inclined baffles can eliminate the oil flow impact pulsation caused by a sudden increase in load, weaken the excitation force of flow-induced vibration, reduce the alternating stress of the welds and connecting bolts of the heat dissipation pipe, delay fatigue cracking and bolt loosening, and extend the mechanical life of the heat dissipation structure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram showing the connection between the oil inlet pipe and the heat sink of the present invention; Figure 3 This is a schematic diagram of the internal three-dimensional structure of the heat sink of the present invention; Figure 4 This is a three-dimensional structural diagram of the unidirectional flow component of the present invention; Figure 5 This is a three-dimensional structural diagram of the modified unidirectional flow component of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the flow regulation component of the present invention; Figure 7 This is a three-dimensional schematic diagram of the flow regulation component of the present invention.

[0016] In the diagram: 1. Main body; 2. Oil tank; 3. Oil inlet pipe; 4. Heat sink; 5. Oil outlet pipe; 6. Fan; 7. Oil inlet channel; 8. Branch channel; 9. Oil outlet channel; 10. Baffle; 11. Fixing plate; 121. Push block; 122. Moving block; 123. Connecting plate; 124. Return spring; 13. Opening and closing plate; 14. Oil inlet plate; 15. Oil outlet plate; 161. Piston; 162. Compression spring; 163. Connecting rod. Detailed Implementation

[0017] To further illustrate the present invention, the following description is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] like Figures 1 to 7 As shown, a new energy oil-immersed transformer includes a main body 1. An oil storage tank 2 is connected to the top of the main body 1 via a pipe. Multiple oil inlet pipes 3 and oil outlet pipes 5 are equally spaced on both sides of the main body 1. A heat sink 4 is fixed between the oil inlet pipes 3 and oil outlet pipes 5. A fan 6 is fixed to the bottom of the oil outlet pipe 5, and the fan 6 cools the oil inside the heat sink 4. An oil inlet channel 7 is provided at the top of the oil outlet pipe 5, and an oil outlet channel 9 is provided at the bottom of the oil outlet pipe 5. The oil inlet channels 7 and oil outlet channels 9 are equally spaced. Multiple branch channels 8 are provided. Baffles 10 and fixing plates 11 are fixed on the inner wall of the branch channels 8. An oil inlet plate 14 is provided at the connection between the oil inlet channel 7 and the branch channel 8. A flow regulating component is provided inside the oil inlet plate 14. An opening and closing plate 13 is fixed at the top of the flow regulating component, and the oil inlet volume is regulated by the flow regulating component. An oil outlet plate 15 is provided at the connection between the branch channel 8 and the oil outlet channel 9. A one-way flow component is provided inside the oil outlet plate 15, and the one-way flow component prevents oil backflow.

[0019] In specific implementation, the top of the main body 1 is connected to the oil storage tank 2. Multiple sets of oil inlet pipes 3 and oil outlet pipes 5 are installed at equal intervals on both sides of the main body 1. Heat sinks 4 are fixed between the oil inlet pipes 3 and oil outlet pipes 5. The fan 6 at the bottom of the oil outlet pipe 5 can provide forced air cooling for the heat sinks 4. The heat sink 4 has a connected oil inlet channel 7, multiple branch channels 8 and oil outlet channel 9 inside. The branch channels 8 realize the uniform distribution of insulating oil. The baffles 10 on the inner wall of the branch channels 8 extend the heat exchange time of the oil flow, enhance heat dissipation and buffer the oil flow vibration. The fixing plate 11 is used to fix the transmission structure. The oil inlet plate 14 between the oil inlet channel 7 and the branch channels 8 has a built-in flow regulation component with an opening and closing plate 13, which can adaptively adjust the oil flow speed and oil inlet volume. The unidirectional flow component inside the oil outlet plate 15 can effectively prevent the insulating oil from flowing back and avoid the mixing of hot and cold oil. The whole is adapted to the working conditions of large load fluctuation and strong vibration of new energy transformers through a purely mechanical linkage structure, realizing efficient and stable adaptive heat dissipation.

[0020] As a further embodiment of the present invention, the oil inlet plate 14 is symmetrically provided with multiple oil inlets, the oil outlet plate 15 is provided with an oil outlet, the branch channel 8 is divided into left and right channels by the fixing plate 11, the bottom end of the fixing plate 11 is provided with an inclined surface to facilitate oil flow, and the oil guiding inclined surface is located in the lower half of the branch channel 8, close to the confluence area of ​​the oil outlet plate 15. The inclined surface guides the downward oil flow of the branch channel 8 to be smoothly gathered and merged into the oil outlet of the oil outlet plate 15.

[0021] In practical implementation, the oil inlet plate 14 is symmetrically opened with multiple oil inlets to achieve uniform oil intake, and the oil outlet plate 15 is opened with an oil outlet for the concentrated discharge of cooled oil. The branch channel 8 is divided into two independent channels on the left and right by the fixing plate 11, and the bottom end of the fixing plate 11 is provided with an oil guiding slope to smoothly guide the flow of insulating oil and reduce oil flow resistance. In conjunction with the flow regulation component of the oil inlet plate 14 and the unidirectional flow component of the oil outlet plate 15, it can not only evenly distribute the oil flow, stabilize the oil channel flow state, extend the heat exchange time, and improve the heat dissipation efficiency, but also prevent the backflow and mixing of insulating oil under vibration conditions, effectively avoid heat dissipation short circuit and flow-induced vibration problems, and adapt to the fluctuating load operation conditions of new energy transformers.

[0022] As a further embodiment of the present invention, the baffles 10 are symmetrically distributed at equal intervals on the inner wall of the branch channel 8, and the baffles 10 are inclined. The oil inlet plate 14 is slidably connected to the opening and closing plate 13.

[0023] In specific implementation, baffles 10 are symmetrically and inclinedly arranged at equal intervals on the inner wall of the branch channel 8, which effectively extends the flow path and heat exchange time of the insulating oil. At the same time, the disturbance of the oil flow breaks the heat exchange boundary layer, weakens the oil flow vibration, and improves the overall heat dissipation efficiency. The oil inlet plate 14 and the opening and closing plate 13 slide together, which can be used in conjunction with the mechanical linkage structure to adaptively adjust the oil inlet flow area and control the oil flow velocity, avoid the risk of static electricity in high-speed oil flow and the problem of uneven heat dissipation, and adapt to the high fluctuation and strong vibration operating conditions of new energy transformers.

[0024] As a further embodiment of the present invention, the flow regulating component includes a push block 121 disposed in a fixed plate 11, a moving block 122 symmetrically slidably connected to the push block 121, a connecting plate 123 fixed on one side of the moving block 122, a reset spring 124 disposed between the two connecting plates 123, and the top end of the connecting plate 123 fixedly connected to the opening and closing plate 13.

[0025] In practice, the vertical movement of the push block 121 inside the fixed plate 11 drives the horizontal movement of the symmetrical sliding moving blocks 122 on both sides through the inclined plane. The moving blocks 122 drive the connecting plate 123 to move synchronously and stretch the reset spring 124. The connecting plate 123, in conjunction with the opening and closing plate 13, slides to change the opening of the oil inlet, thereby adaptively controlling the oil flow rate and extending the oil heat exchange time. The reset spring 124 can drive the components to reset when the oil flow rate decreases, avoiding problems such as static electricity and flow-induced vibration caused by excessively high oil flow rate.

[0026] As a further embodiment of the present invention, the fixed plate 11 has a cavity that moves in conjunction with the connecting plate 123 and the opening and closing plate 13. The contact surfaces of the push block 121 and the moving block 122 are both inclined surfaces. The vertical movement of the push block 121 drives the moving block 122 to move in the horizontal direction.

[0027] In practice, the fixed plate 11 has a cavity for the connecting plate 123 and the opening and closing plate 13 to move, providing space for the movement of each part. The push block 121 and the moving block 122 adopt an inclined contact structure, which can convert the vertical displacement of the push block 121 into the horizontal displacement of the moving block 122, thereby linking the opening and closing plate 13 to adjust the size of the oil inlet, autonomously control the oil flow rate, extend the heat exchange time of the insulating oil, and reduce static electricity in the oil flow and pipeline vibration.

[0028] As a further embodiment of the present invention, the unidirectional flow component includes a piston 161 disposed in the oil outlet plate 15, a compression spring 162 disposed at the bottom end of the piston 161, a connecting rod 163 fixed at the top end of the compression spring 162, and the connecting rod 163 being fixedly connected to the push block 121.

[0029] In specific implementation, the piston 161 inside the oil outlet plate 15, in conjunction with the bottom compression spring 162, achieves one-way opening and closing of the oil circuit. The forward oil flow can push the piston 161 down to compress the spring 162 and open the oil outlet. When oil backflow occurs, the piston 161 moves up to block the oil circuit and prevent the mixing of hot and cold oil. The piston 161 is rigidly linked to the push block 121 through the connecting rod 163. The vertical displacement of the piston 161 can synchronously drive the flow regulating component to adjust the opening degree of the opening and closing plate 13, passively and adaptively controlling the oil flow speed, improving the heat dissipation effect and suppressing static electricity and flow-induced vibration of the oil flow.

[0030] As a further embodiment of the present invention, the oil outlet plate 15 has a cavity that cooperates with the piston 161. The piston 161 is frustoconical, and the conical surface of the piston 161 is in close contact with the inner wall of the cavity opened by the oil outlet plate 15. The fixing plate 11 has a cavity that cooperates with the connecting rod 163.

[0031] In specific implementation, the oil outlet plate 15 is provided with a cavity for the piston 161 to move. The conical surface of the frustoconical piston 161 can fit tightly with the inner wall of the cavity to achieve oil circuit sealing and prevent the cooling oil from flowing back. The fixed plate 11 has a cavity for the connecting rod 163 to move smoothly up and down, so that the piston 161's movement can be synchronously transmitted to the push block 121 to adjust the oil flow rate, avoid the mixing of hot and cold oil causing a decrease in heat dissipation efficiency, and at the same time reduce vibration and static electricity problems caused by oil flow impact.

[0032] As a further embodiment of the present invention, a compression spring 162 is provided in the cavity of the oil outlet plate 15. One end of the compression spring 162 is fixedly connected to the inner wall of the cavity, and the other end of the compression spring 162 is fixedly connected to the piston 161.

[0033] In specific implementation, a compression spring 162 is installed inside the cavity of the oil outlet plate 15. The two ends of the compression spring 162 are connected to the inner wall of the cavity and the piston 161 respectively. The positive oil flow pressure can push the piston 161 down to compress the compression spring 162 to open the oil passage. If oil backflow occurs, the compression spring 162, in conjunction with the reverse oil pressure, pushes the piston 161 up to block the oil outlet and prevent the mixing of hot and cold oil. At the same time, the piston 161 can drive the flow regulating component through the linkage rod 163 to adjust the oil flow speed and ensure stable heat dissipation.

[0034] Working principle: When using this new energy oil-immersed transformer, based on the law of electromagnetic induction, the low-voltage AC power output from the new energy inverter system is converted into high-voltage power suitable for the public power grid. The iron core and windings in the main body 1 are completely immersed in the insulating oil in the oil tank 2. The insulating oil simultaneously undertakes the functions of electrical insulation and heat conduction. It ensures electrical safety between windings and between windings and the tank through the high insulation strength of the oil, adapting to the harsh outdoor humid and dusty site environment, reducing the risk of surface discharge and insulation breakdown. It can also efficiently carry away the heat loss generated by the windings and iron core through convection circulation, achieving uniform heat dissipation throughout the equipment. When the transformer is running, the heated insulating oil rises and overflows, and is transported to the heat sink 4 through the oil inlet pipe 3. The heat is conducted to the external environment through the metal tube wall and external fins of the heat sink 4 to complete the cooling. When the load is overloaded or the additional heating caused by harmonics causes the oil temperature to exceed the threshold, the fan 6 is started to enhance the air-side convection heat transfer, further improving the heat dissipation power. The cooled insulating oil naturally flows back to the bottom of the main body 1 through the oil outlet pipe 5 due to the density difference.

[0035] When the insulating oil flows into the heat sink 4, it first flows into the oil inlet channel 7 at the top of the heat sink 4. After being evenly distributed through multiple equally spaced branch channels 8, it enters each parallel heat exchange branch, so that the oil flow is evenly distributed to each group of heat exchange fins. This avoids the problem of local branch flow overload and some branch heat dissipation capacity idle, maximizes the use of the entire heat dissipation area, and improves the overall heat exchange efficiency. The cooled insulating oil finally converges into the oil outlet channel 9 at the bottom of the heat sink 4 and is discharged. During the flow of the oil in the branch channels 8, it will continuously impact the inclined cloth in the channel. The baffle 10 has two functions. First, by bending the flow channel, the baffle 10 extends the actual flow path and residence time of the oil flow, allowing the oil and the pipe wall sufficient time to complete heat exchange and significantly reduce the oil outlet temperature. Second, it can create turbulence in the oil flow, break the laminar boundary layer on the pipe wall surface, improve the convective heat transfer coefficient on the oil side, and enhance the heat transfer capacity of a single branch. At the same time, the inclined baffle 10 can buffer the oil flow impact pulsation caused by a sudden increase in load, weaken the excitation force of flow-induced vibration, reduce the alternating stress of the heat dissipation pipe, and delay the process of weld fatigue cracking and loosening of connecting bolts.

[0036] When the transformer load increases and the frequency and amplitude of the body vibration increase synchronously, the driving force of the oil circulation increases, the flow rate of insulating oil into the heat sink 4 increases synchronously, and the oil flow thrust in the branch channel 8 increases accordingly, pushing the piston 161 to move downward along the inner wall of the cavity of the oil outlet plate 15. The compression spring 162 between the piston 161 and the inner wall of the cavity is compressed, the oil outlet is opened normally, and the insulating oil maintains a positive unidirectional flow. However, when the vibration of the body causes the cooled oil in the oil outlet channel 9 to flow in the reverse direction to the branch channel 8, the reverse-flowing cold oil will directly impact the bottom of the piston 161, driving the piston 161... Moving upwards in the opposite direction allows the conical surface of piston 161 to fit tightly against the inner wall of the cavity of oil outlet plate 15, completely sealing the oil outlet of oil outlet plate 15 and blocking the reverse flow of cold oil into branch channel 8. This avoids the "heat dissipation short circuit" phenomenon caused by the mixing of cooled oil with high-temperature inlet oil, which reduces the heat exchange temperature difference. This ensures that heat sink 4 always operates at the maximum heat exchange temperature difference. At the same time, it can block the reciprocating pulsation of oil flow, weaken the excitation source of flow-induced vibration from the source, avoid coupling resonance with the body vibration, reduce the risk of fatigue failure of heat dissipation structure, and also ensure that the winding inlet oil temperature is at a low level, enhancing the internal heat dissipation effect of winding.

[0037] As piston 161 moves forward, it drives the connecting rod 163 fixed at its top to move downward simultaneously. The connecting rod 163 further pushes the push block 121 at its top to slide vertically along the fixed plate 11. Since the push block 121 and the moving block 122 are in inclined sliding engagement, and their contact surfaces are both inclined in the same direction, the vertical downward movement of the push block 121 is converted into the horizontal lateral movement of the moving block 122, which in turn drives the connecting plate 123 fixedly connected to the moving block 122 to move horizontally simultaneously. At this time, the connection between the connecting plates 123... The return spring 124 is stretched, eventually pushing the opening and closing plate 13 to slide along the bottom end of the oil inlet plate 14, gradually blocking the oil inlet of the oil inlet plate 14, reducing the flow cross-sectional area of ​​the insulating oil entering the branch channel 8, reducing the oil flow velocity, and prolonging the flow and heat exchange time of the insulating oil in the branch channel 8. The larger the load, the higher the oil flow rate, and the more severe the vibration, the oil inlet opening will automatically narrow, controlling the oil flow velocity within a safe threshold. This can effectively avoid the problem of static electricity charging of oil flow caused by high-speed oil flow and reduce the risk of insulation degradation caused by electrostatic discharge at the winding end.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any modifications, equivalent changes, and alterations made by any person skilled in the art to the above embodiments without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A new energy oil-immersed transformer, comprising a main body (1), characterized in that, The top of the main body (1) is connected to an oil storage tank (2) via a pipe. Multiple oil inlet pipes (3) and oil outlet pipes (5) are equally spaced on both sides of the main body (1). A heat sink (4) is fixed between the oil inlet pipes (3) and the oil outlet pipes (5). A fan (6) is fixed at the bottom of the oil outlet pipe (5), and the fan (6) cools the oil in the heat sink (4). An oil inlet channel (7) is provided at the top of the oil outlet pipe (5), and an oil outlet channel (9) is provided at the bottom of the oil outlet pipe (5). Multiple oil inlet channels (7) and oil outlet channels (9) are equally spaced between them. A branch channel (8) is provided, with a baffle (10) and a fixing plate (11) fixed on the inner wall of the branch channel (8). An oil inlet plate (14) is provided at the connection between the oil inlet channel (7) and the branch channel (8). A flow regulating component is provided in the oil inlet plate (14). An opening and closing plate (13) is fixed at the top of the flow regulating component, and the oil inlet volume is regulated by the flow regulating component. An oil outlet plate (15) is provided at the connection between the branch channel (8) and the oil outlet channel (9). A one-way flow component is provided in the oil outlet plate (15), and the one-way flow component prevents oil backflow.

2. The new energy oil-immersed transformer according to claim 1, characterized in that, The oil inlet plate (14) is symmetrically provided with multiple oil inlets, the oil outlet plate (15) is provided with an oil outlet, the branch channel (8) is divided into left and right channels by the fixing plate (11), and the bottom end of the fixing plate (11) is provided with an inclined surface to facilitate oil flow.

3. The new energy oil-immersed transformer according to claim 1, characterized in that, The baffles (10) are symmetrically distributed at equal intervals on the inner wall of the branch channel (8), and the baffles (10) are inclined. The oil inlet plate (14) is slidably connected to the opening and closing plate (13).

4. A new energy oil-immersed transformer according to claim 1, characterized in that, The flow regulating component includes a push block (121) disposed in a fixed plate (11), a moving block (122) symmetrically slidably connected to the push block (121), a connecting plate (123) fixed on one side of the moving block (122), a reset spring (124) disposed between the two connecting plates (123), and the top of the connecting plate (123) fixedly connected to the opening and closing plate (13).

5. A new energy oil-immersed transformer according to claim 4, characterized in that, The fixed plate (11) has a cavity that allows the connecting plate (123), the connecting plate (123) and the opening and closing plate (13) to move. The contact surfaces of the push block (121) and the moving block (122) are both inclined surfaces. When the push block (121) moves in the vertical direction, it drives the moving block (122) to slide in the horizontal direction through the inclined surface.

6. A new energy oil-immersed transformer according to claim 4, characterized in that, The unidirectional flow assembly includes a piston (161) disposed in an oil outlet plate (15), a compression spring (162) disposed at the bottom end of the piston (161), a connecting rod (163) fixed at the top end of the compression spring (162), and the connecting rod (163) being fixedly connected to the push block (121).

7. A new energy oil-immersed transformer according to claim 6, characterized in that, The oil outlet plate (15) has a cavity that moves with the piston (161). The piston (161) is frustoconical, and the conical surface of the piston (161) is sealed to the inner wall of the cavity opened by the oil outlet plate (15). The fixing plate (11) has a cavity that moves with the connecting rod (163).

8. A new energy oil-immersed transformer according to claim 6, characterized in that, A compression spring (162) is provided in the cavity of the oil outlet plate (15). One end of the compression spring (162) is fixedly connected to the inner wall of the cavity, and the other end of the compression spring (162) is fixedly connected to the piston (161).

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