Oil-immersed transformer with leakage monitoring function

Abstract

The invention provides an oil-immersed transformer with a leakage monitoring function, which belongs to the technical field of transformers and comprises a transformer main body, a radiator, a first oil tank, a compensation pipeline and a first piston. Wherein a movable plate is arranged on the side, away from the compensation pipeline, of the first piston, a spring used for applying elastic tension to the first piston is connected between the first piston and the movable plate, and a distance sensor used for monitoring the distance between the first piston and the movable plate is connected to the movable plate. The first piston, the spring and the distance sensor are arranged in the first oil tank, when equipment leaks, the first piston can be pulled by the spring for a long distance in a short time and monitored by the distance sensor, the leakage monitoring effect is achieved, and when the first piston is pulled by the spring, the first piston can be pulled by the distance sensor for a long time; the first piston can extract the insulating oil in the heat dissipation fins through the pipeline, so that leakage points of the heat dissipation fins are in a negative pressure state, and the leakage amount of the insulating oil is reduced.

Description

Technical Field

[0001] This invention belongs to the field of transformer technology, specifically referring to an oil-immersed transformer with leakage monitoring. Background Technology

[0002] Oil-immersed transformers are the most widely used type of transformer in power systems. Their core feature is that the core and windings (coils) are completely submerged in insulating oil (transformer oil). This design primarily solves the two key problems of insulation and heat dissipation during transformer operation.

[0003] Transformer oil is mainly cooled by corrugated radiators installed on the oil tank. In order to make the corrugated radiator have a good heat dissipation effect, the individual corrugated fins extend outward a large distance to obtain a large heat dissipation area. At the same time, the wall thickness is thin to shorten the heat exchange distance. However, the large span and lightweight corrugated fins will reduce their own strength. With the vibration of the transformer, they become the most vulnerable part of the transformer to metal fatigue failure and leakage of insulating oil.

[0004] Currently, there is a lack of means to monitor insulating oil leakage in oil-immersed transformers, especially for leakage in corrugated radiators, which is difficult to monitor in real time. Once a leakage occurs, it will lead to a large amount of insulating oil leaking out, posing risks of fire and environmental pollution. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides an oil-immersed transformer with leakage monitoring, which at least partially solves the above problems.

[0006] The technical solution adopted by this invention is as follows: This invention proposes an oil-immersed transformer with leakage monitoring, comprising: The transformer body has heat sinks connected to its interior on both sides; The first oil tank is located on one side of the transformer body, and one end of the first oil tank is provided with a compensation pipeline connected to the radiator; A first piston for isolating air is slidably connected inside the first oil tank; The first piston has a movable plate on the side away from the compensation pipeline. A spring for applying elastic tension to the first piston is connected between the first piston and the movable plate. A distance sensor for monitoring the distance between the first piston and the movable plate is connected to the movable plate. An electric push rod is provided on the outside of the first oil tank to drive the movable plate to move, so that the spring can be stretched and stored by the electric push rod.

[0007] Furthermore, a second oil tank is provided on one side of the first oil tank, and an oil extraction pipeline connected to the main body of the transformer is provided at one end of the second oil tank, with an oil pump connected in series on the oil extraction pipeline.

[0008] Furthermore, the interior of the second oil tank is equipped with a second piston for isolating air.

[0009] Furthermore, a second control valve is connected to the oil extraction pipeline for cutting off the communication between the transformer body and the interior of the second oil tank.

[0010] Furthermore, a first control valve is connected to the compensation pipeline for cutting off the communication between the radiator and the inside of the first oil tank.

[0011] Furthermore, a diversion pipe is connected between the compensation pipeline and the oil extraction pipeline. One end of the diversion pipe connected to the compensation pipeline is located between the first control valve and the first oil tank, and the other end of the diversion pipe connected to the oil extraction pipeline is located between the second control valve and the oil pump.

[0012] Furthermore, the heat sink includes multiple arrayed heat dissipation fins, which are in communication with the interior of the transformer body.

[0013] Furthermore, a connecting pipe is provided on one side of the radiator, the connecting pipe is connected to the compensation pipe, and the connecting pipe is provided with a number of connecting pipes corresponding to the number of heat dissipation fins. One end of the connecting pipe is connected to the connecting pipe, and the other end of the connecting pipe is connected to the heat dissipation fins.

[0014] Furthermore, the telescopic end of the electric push rod is provided with a traction frame, one end of which is connected to the telescopic end of the electric push rod, and the other end of which is connected to the movable plate.

[0015] Furthermore, the end of the first oil tank away from the compensation pipeline is connected to a first breather pipe for balancing the internal air pressure of the first oil tank, and the end of the second oil tank away from the oil extraction pipeline is connected to a second breather pipe for balancing the internal air pressure of the second oil tank.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows: 1. By installing a first piston, spring, and distance sensor inside the first oil tank, when the equipment leaks, external air enters. At this time, the first piston can be pulled a long distance by the spring in a short time and detected by the distance sensor. Then, the signal is transmitted to the remote control terminal in real time for alarm, thus playing the role of leak detection.

[0017] 2. Since each heat sink fin is connected by a connecting pipe, when a heat sink fin leaks, the first piston is pulled by the spring, so that the distance sensor can detect the leak. At the same time, the first piston can draw the insulating oil in the heat sink fin through the pipe, so that the leak point of the heat sink fin is in a negative pressure state, thereby reducing the amount of insulating oil leakage.

[0018] 3. By setting up a second oil tank and an oil pump, when the equipment leaks, the oil pump can pump the insulating oil in the equipment to the first and second oil tanks for storage, thereby reducing the leakage of insulating oil. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an oil-immersed transformer with leakage monitoring according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation location of the oil pump in an oil-immersed transformer with leakage monitoring, as proposed in an embodiment of the present invention. Figure 3 This is a schematic diagram of the internal structure of the first and second oil tanks in an oil-immersed transformer with leakage monitoring according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the compensation pipeline and oil extraction pipeline in an oil-immersed transformer with leakage monitoring according to an embodiment of the present invention; Figure 5 This is a schematic diagram showing the connection positions of the connecting pipe and the connecting tube in an oil-immersed transformer with leakage monitoring according to an embodiment of the present invention.

[0020] The components are as follows: 1. Transformer body; 2. Heat dissipation fins; 21. Connecting pipe; 22. Connecting pipe; 3. First oil tank; 301. First breathing pipe; 31. Compensation pipeline; 32. First piston; 33. Movable plate; 34. Spring; 35. Electric push rod; 36. Distance sensor; 37. Traction frame; 4. Second oil tank; 401. Second breathing pipe; 41. Oil extraction pipeline; 42. Oil pump; 43. Second piston; 5. First control valve; 6. Second control valve; 7. Diverter pipe; 71. Third control valve.

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] like Figure 1 As shown, the present invention proposes an oil-immersed transformer with leakage monitoring, including a transformer body 1, a radiator, a first oil tank 3 and a compensation pipeline 31.

[0025] Two radiators are provided, which are connected to both sides of the transformer body 1 and communicate with the interior of the transformer body 1, so that the insulating oil inside the transformer body 1 can enter the radiator and dissipate heat from the insulating oil.

[0026] The first oil tank 3 is located on one side of the transformer body 1. One end of the compensation pipe 31 is connected to the first oil tank 3, and the other end of the compensation pipe 31 is connected to the radiator. At this time, the interior of the first oil tank 3 is connected to the radiator and the interior of the transformer body 1 through the compensation pipe 31.

[0027] Combination Figure 4 As shown, a first piston 32 for isolating air is slidably connected inside the first oil tank 3. A first breathing pipe 301 for balancing the air pressure inside the first oil tank 3 is connected to the end of the first oil tank 3 away from the compensation pipe 31. The first oil tank 3 is filled with insulating oil, and the insulating oil is filled between the first piston 32 and the compensation pipe 31. At this time, the insulating oil inside the first oil tank 3 is connected to the insulating oil inside the radiator and the transformer body 1 through the compensation pipe 31.

[0028] Thus, when the insulating oil inside the radiator and transformer body 1 expands due to high temperature, the excess insulating oil flows to the first oil tank 3 through the compensation pipe 31 to balance the pressure inside the radiator and transformer body 1. At the same time, under the action of oil pressure, the first piston 32 in the first oil tank 3 is pushed towards the first breather pipe 301, and the gas in the first oil tank 3 is discharged through the first breather pipe 301 to balance the gas pressure in the first oil tank 3. When the insulating oil inside the radiator and transformer body 1 decreases in volume due to low temperature, under the action of atmospheric pressure, the first piston 32 in the first oil tank 3 is pushed away from the first breather pipe 301. At this time, the insulating oil in the first oil tank 3 flows into the radiator and transformer body 1 through the compensation pipe 31 to compensate for the insulating oil. At the same time, air is introduced into the first oil tank 3 through the first breather pipe 301 to balance the air pressure in the first oil tank 3.

[0029] The insulating oil is prevented from coming into contact with air by the isolation provided by the first piston 32.

[0030] Combination Figure 3 and Figure 4 As shown, a movable plate 33 is provided on the side of the first piston 32 away from the compensation pipe 31. A spring 34 is connected between the first piston 32 and the movable plate 33 to apply elastic tension to the first piston 32. When the spring 34 is stretched, the spring 34 is in a stored state. At this time, the elastic potential energy of the spring 34 acts on the first piston 32, so that the first piston 32 always tends to move towards the movable plate 33.

[0031] Since the radiator, transformer body 1 and compensation pipe 31 are all in a sealed state, when there is no leakage in the radiator, transformer body 1 and compensation pipe 31, the first piston 32 cannot be pulled by the spring 34 due to pressure. Correspondingly, when any one or more of the radiator, transformer body 1 or compensation pipe 31 leaks, the first piston 32 can be pulled a long distance by the spring 34 in a short time.

[0032] Furthermore, a distance sensor 36 is connected to the movable plate 33 to monitor the distance between the first piston 32 and the movable plate 33. The movement of the first piston 32 is monitored by the distance sensor 36, and the monitoring signal is transmitted to the remote control terminal in real time. When the first piston 32 is detected to have moved a long distance in a short period of time, it is determined that the radiator, transformer body 1 or compensation pipe 31 has leaked.

[0033] In an optional embodiment, the distance sensor 36 is either a laser distance sensor or an ultrasonic distance sensor, preferably an ultrasonic distance sensor.

[0034] Thus, when there is no leakage in the radiator, transformer body 1 and compensation pipeline 31, the first piston 32 cannot be pulled by the spring 34. The first piston 32 can only be pushed when the insulating oil is compensated for the volume change of the insulating oil due to thermal expansion and contraction. In this process, the first piston 32 moves slowly and will not move a long distance in a short time. When a leak occurs in any one or more places of the radiator, transformer body 1, or compensation pipe 31, external air enters. At this time, the first piston 32 can be pulled a long distance by the spring 34 in a short time and is detected by the distance sensor 36. Then, it is transmitted to the remote control terminal in real time for alarm.

[0035] It should be noted that when the insulating oil decreases in volume due to low temperature, atmospheric pressure is sufficient to push the first piston 32 away from the first breathing pipe 301 (i.e., closer to the compensation pipe 31), thereby pushing the insulating oil in the first oil tank 3 into the transformer body 1.

[0036] Furthermore, the outer side of the first oil tank 3 is provided with an electric push rod 35 for driving the movable plate 33 to move, so that the spring 34 can be stretched and stored by the electric push rod 35. During equipment installation, the spring 34 is pulled to the stretched and stored state by the electric push rod 35. Correspondingly, during equipment maintenance, the spring 34 is slowly released by the electric push rod 35, saving manpower and improving safety.

[0037] In a specific embodiment, the telescopic end of the electric push rod 35 is provided with a traction frame 37. One end of the traction frame 37 is connected to the telescopic end of the electric push rod 35, and the other end of the traction frame 37 is connected to the movable plate 33. The electric push rod 35 pulls the movable plate 33 through the traction frame 37.

[0038] Understandably, since the movable plate 33 is driven by the electric push rod 35, the electric push rod 35 can be remotely controlled. Furthermore, since the distance sensor 36 is mounted on the movable plate 33, the movement of the movable plate 33 can be caused by remotely controlling the electric push rod 35. If the distance sensor 36 can detect the change in distance between the movable plate 33 and the first piston 32, it can be determined that both the distance sensor 36 and the electric push rod 35 are functioning normally. If the distance sensor 36 cannot detect the change in distance between the movable plate 33 and the first piston 32, it can be determined that either the distance sensor 36 or the electric push rod 35 is malfunctioning and requires timely repair, thus serving as a remote self-check function.

[0039] Combination Figure 1 and Figure 4 As shown, a second oil tank 4 is provided on one side of the first oil tank 3. One end of the second oil tank 4 is provided with an oil extraction pipeline 41 connected to the transformer body 1. An oil pump 42 is connected in series on the oil extraction pipeline 41. The oil pump 42 is connected to the remote control terminal signal. When a leak is detected in the equipment, the oil pump 42 is started. The oil pump 42 pumps the insulating oil in the equipment to the second oil tank 4 for storage through the oil extraction pipeline 41, thereby reducing the leakage of insulating oil.

[0040] It should be noted that the oil extraction pipeline 41 is connected to the lowest point of the transformer body 1, so that the insulating oil in the transformer body 1 can be extracted by the oil extraction pipeline 41 as much as possible.

[0041] Furthermore, the interior of the second oil tank 4 is equipped with a second piston 43 for isolating air. The end of the second oil tank 4 away from the oil extraction pipe 41 is connected to a second breather pipe 401 for balancing the air pressure inside the second oil tank 4. When the oil pump 42 draws insulating oil, the insulating oil is stored inside the second oil tank 4 between the second piston 43 and the oil extraction pipe 41. As the insulating oil is continuously drawn, the second piston 43 is pushed to one side of the second breather pipe 401. At the same time, the gas in the second oil tank 4 is discharged through the second breather pipe 401 to balance the air pressure inside the second oil tank 4.

[0042] Combination Figure 4 As shown, a second control valve 6 is connected to the oil extraction pipeline 41 to cut off the internal connection between the transformer body 1 and the second oil tank 4. When the equipment does not leak, the second control valve 6 is in the closed state. At this time, the second oil tank 4 is not connected to the transformer body 1. When the insulating oil inside the transformer body 1 expands and contracts with temperature, the change in the volume of the insulating oil is only compensated by the first oil tank 3. When the equipment leaks, the second control valve 6 is opened, so that the oil pump 42 can pump the insulating oil in the equipment to the second oil tank 4 for storage through the oil extraction pipeline 41.

[0043] Furthermore, a first control valve 5 is connected to the compensation pipeline 31 to cut off the connection between the radiator and the inside of the first oil tank 3. When there is no leakage, the first control valve 5 is in the open state, so that the insulating oil inside the transformer body 1 can compensate for the change in the volume of the insulating oil through the first oil tank 3 when it expands and contracts with heat. When there is a leakage, the first control valve 5 is closed to prevent the insulating oil in the first oil tank 3 from flowing into the transformer body 1 and reduce the leakage of insulating oil.

[0044] Furthermore, a diversion pipe 7 connects the compensation line 31 and the oil extraction line 41. One end of the diversion pipe 7 is connected to the compensation line 31 between the first control valve 5 and the first oil tank 3, and the other end of the diversion pipe 7 is connected to the oil extraction line 41 between the second control valve 6 and the oil pump 42 (e.g., Figure 4 As shown in the figure, a third control valve 71 is connected to the diversion pipe 7.

[0045] Thus, when a leak occurs in the equipment, the first control valve 5 is closed, and the second control valve 6 and the third control valve 71 are opened, so that the oil pump 42 can pump the insulating oil in the equipment to the first oil tank 3 and the second oil tank 4 for storage. After the insulating oil is completely extracted, the first control valve 5, the second control valve 6 and the third control valve 71 are all closed to prevent the insulating oil from flowing back.

[0046] It should be noted that the transformer body 1 is equipped with a liquid level sensor, which is used to determine whether the insulating oil inside the transformer body 1 has been completely extracted.

[0047] In an optional embodiment, the first control valve 5, the second control valve 6, and the third control valve 71 are all solenoid valves.

[0048] Combination Figure 1 As shown, the radiator includes multiple arrayed heat dissipation fins 2, which are connected to the interior of the transformer body 1. A connecting pipe 21 is provided on one side of the radiator, which is connected to the compensation pipe 31. The connecting pipe 21 is provided with a number of connecting pipes 22 corresponding to the number of heat dissipation fins 2. One end of the connecting pipe 22 is connected to the connecting pipe 21, and the other end of the connecting pipe 22 is connected to the heat dissipation fins 2.

[0049] Since each heat sink fin 2 is connected by a connecting pipe 22, when a leak occurs in the heat sink fin 2, it can be detected more quickly, thus improving the sensitivity of the monitoring.

[0050] It should be noted that the present invention also includes a signal transmission unit. The first control valve 5, the second control valve 6 and the third control valve 71 are all connected to the signal transmission unit. The distance sensor 36, the electric push rod 35 and the oil pump 42 are also connected to the signal transmission unit. All of the above devices are connected to the remote control terminal through the signal transmission unit and are remotely controlled by the remote control terminal.

[0051] The working principle of the present invention is as follows: When the insulating oil inside the radiator and transformer body 1 expands due to high temperature, the excess insulating oil flows to the first oil tank 3 through the compensation pipe 31 to balance the pressure inside the radiator and transformer body 1. At the same time, under the action of oil pressure, the first piston 32 in the first oil tank 3 is pushed towards the first breather pipe 301, and the gas in the first oil tank 3 is discharged through the first breather pipe 301 to balance the gas pressure in the first oil tank 3. When the insulating oil inside the radiator and transformer body 1 decreases in volume due to low temperature, under the action of atmospheric pressure, the first piston 32 in the first oil tank 3 is pushed away from the first breathing pipe 301. At this time, the insulating oil in the first oil tank 3 flows to the radiator and transformer body 1 through the compensation pipe 31 to compensate for the insulating oil. At the same time, air is introduced into the first oil tank 3 through the first breathing pipe 301 to balance the air pressure in the first oil tank 3. When there is no leakage in the radiator, transformer body 1 and compensation pipeline 31, the first piston 32 cannot be pulled by the spring 34. The first piston 32 can only be pushed when the insulating oil volume changes due to thermal expansion and contraction. In this process, the first piston 32 moves slowly and will not move a long distance in a short time. When a leak occurs in any one or more places of the radiator, transformer body 1 or compensation pipe 31, external air enters. At this time, the first piston 32 can be pulled a long distance by the spring 34 in a short time, and the movement speed is fast. It is detected by the distance sensor 36 and then transmitted to the remote control terminal in real time for alarm. When a leak occurs in the equipment, the first control valve 5 is closed, and the second control valve 6 and the third control valve 71 are opened, so that the oil pump 42 can pump the insulating oil in the equipment to the first oil tank 3 and the second oil tank 4 for storage, thereby reducing the leakage of insulating oil. After the insulating oil is completely extracted, the first control valve 5, the second control valve 6 and the third control valve 71 are all closed to prevent the insulating oil from flowing back.

[0052] In summary, by installing a first piston 32, a spring 34, and a distance sensor 36 inside the first oil tank 3, when a leak occurs in the equipment, external air enters. At this time, the first piston 32 can be pulled a relatively long distance by the spring 34 in a short period of time, which is detected by the distance sensor 36 and then transmitted to the remote control terminal in real time for alarm, thus playing the role of leak detection.

[0053] Since each heat sink fin 2 is connected by a connecting pipe 22, when the heat sink fin 2 leaks, the first piston 32 is pulled by the spring 34, so that the distance sensor 36 can detect the leak. At the same time, the first piston 32 can draw the insulating oil in the heat sink fin 2 through the pipe, so that the leak point of the heat sink fin 2 is in a negative pressure state, thereby reducing the amount of insulating oil leakage.

[0054] By setting up a second oil tank 4 and an oil pump 42, when the equipment leaks, the oil pump 42 can pump the insulating oil in the equipment to the first oil tank 3 and the second oil tank 4 for storage, thereby reducing the leakage of insulating oil. After the insulating oil is completely extracted, the first control valve 5, the second control valve 6 and the third control valve 71 are all closed to prevent the insulating oil from flowing back.

[0055] Since the movable plate 33 is driven by an electric push rod 35, the electric push rod 35 can be remotely controlled. Since the distance sensor 36 is installed on the movable plate 33, the movable plate 33 can be moved by remotely controlling the electric push rod 35. The distance sensor 36 can then be observed to detect the distance change between the movable plate 33 and the first piston 32, thus achieving a remote self-test function.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An oil-immersed transformer with leakage monitoring, characterized in that, include: The transformer body (1) has heat sinks connected to its interior on both sides; The first oil tank (3) is located on one side of the transformer body (1), and one end of the first oil tank (3) is provided with a compensation pipe (31) connected to the radiator. The first oil tank (3) is slidably connected to a first piston (32) for isolating air. Among them, a movable plate (33) is provided on the side of the first piston (32) away from the compensation pipeline (31), and a spring (34) for applying elastic tension to the first piston (32) is connected between the first piston (32) and the movable plate (33). A distance sensor (36) for monitoring the distance between the first piston (32) and the movable plate (33) is connected to the movable plate (33). The outer side of the first oil tank (3) is provided with an electric push rod (35) for driving the movable plate (33) to move, so that the spring (34) can be stretched and stored by the electric push rod (35).

2. The oil-immersed transformer with leakage monitoring according to claim 1, characterized in that: A second oil tank (4) is provided on one side of the first oil tank (3), and an oil extraction pipeline (41) connected to the transformer body (1) is provided at one end of the second oil tank (4). An oil pump (42) is connected in series on the oil extraction pipeline (41).

3. The oil-immersed transformer with leakage monitoring according to claim 2, characterized in that: The interior of the second oil tank (4) is equipped with a second piston (43) for isolating air.

4. The oil-immersed transformer with leakage monitoring according to claim 3, characterized in that: The oil extraction pipeline (41) is connected to a second control valve (6) for cutting off the internal communication between the transformer body (1) and the second oil tank (4).

5. The oil-immersed transformer with leakage monitoring according to claim 4, characterized in that: The compensation pipeline (31) is connected to a first control valve (5) for cutting off the communication between the radiator and the inside of the first oil tank (3).

6. The oil-immersed transformer with leakage monitoring according to claim 5, characterized in that: A diversion pipe (7) is connected between the compensation pipeline (31) and the oil extraction pipeline (41). One end of the diversion pipe (7) connected to the compensation pipeline (31) is located between the first control valve (5) and the first oil tank (3). The other end of the diversion pipe (7) connected to the oil extraction pipeline (41) is located between the second control valve (6) and the oil pump (42).

7. The oil-immersed transformer with leakage monitoring according to claim 1, characterized in that: The radiator includes multiple arrayed heat dissipation fins (2), which are connected to the interior of the transformer body (1).

8. The oil-immersed transformer with leakage monitoring according to claim 7, characterized in that: A connecting pipe (21) is provided on one side of the radiator. The connecting pipe (21) is connected to the compensation pipe (31). The connecting pipe (21) is provided with a number of connecting pipes (22) corresponding to the heat dissipation fins (2). One end of the connecting pipe (22) is connected to the connecting pipe (21), and the other end of the connecting pipe (22) is connected to the heat dissipation fins (2).

9. The oil-immersed transformer with leakage monitoring according to claim 1, characterized in that: The telescopic end of the electric push rod (35) is provided with a traction frame (37). One end of the traction frame (37) is connected to the telescopic end of the electric push rod (35), and the other end of the traction frame (37) is connected to the movable plate (33).

10. The oil-immersed transformer with leakage monitoring according to claim 2, characterized in that: The first oil tank (3) is connected to a first breathing tube (301) at the end away from the compensation pipeline (31) for balancing the internal air pressure of the first oil tank (3), and the second oil tank (4) is connected to a second breathing tube (401) at the end away from the oil extraction pipeline (41) for balancing the internal air pressure of the second oil tank (4).

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