A device for removing moisture from oil-paper insulation of transformer and a control method thereof

Abstract

This invention provides a device and control method for removing moisture from transformer oil-paper insulation, mainly relating to the field of transformer technology. It includes an insulating oil tank connected to a dewatering tank, which in turn is connected to a condensation tank. The condensation tank contains condensing pipes and is connected to a collection tank. By using condensing pipes, water vapor evaporates upon heating and enters the pipes for condensation. The condensed water vapor forms water droplets, which are then collected in the collection tank. This prevents the dewatering tank from bursting due to increased internal pressure caused by water vapor evaporation.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of transformers, and in particular to a device for removing moisture from transformer oil-paper insulation and a control method thereof. Background Art

[0002] The transformer is one of the key equipment for the stable operation of the power system. It is mainly used to realize voltage conversion, current conversion and voltage stabilization. It is widely used in power engineering. During the production and use of the transformer, oil paper is generally required to realize insulation. The performance of the oil paper is the basic guarantee for the stable operation of the transformer. In order to avoid moisture contamination and changes in the physical properties of the oil paper, it is necessary to remove the moisture in the insulating oil, thereby avoiding changes in the physical properties of the oil paper and thus extending the service life of the transformer. Existing transformer oil-paper insulation moisture removal devices, such as the online dehydration device for oil-paper insulation for large power transformers with publication number CN214374049U, include two circulation loops: a constant temperature heating circulation loop and an online dehydration circulation loop... The device dehydrates the transformer insulating oil online through the mutual cooperation of the modules in the online dehydration circulation loop. The above-mentioned existing transformer oil-paper insulation dehydration device still has certain defects in actual use;

[0003] During the dehydration process, the water in the insulating oil is mainly removed by heating. The evaporation of water will cause the air pressure to increase, which will lead to the risk of explosion of the tank. In addition, during the circulation of the insulating oil, it is inevitable that it will carry certain impurities, which will lead to the accumulation and adhesion of impurities during long-term use, which may easily cause pipe blockage, thereby affecting the normal use of the device. Therefore, it is necessary to improve the above problems to meet actual use needs. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for removing moisture from transformer oil-paper insulation and a control method thereof, so as to solve the technical problem in the prior art that moisture in insulating oil is removed by heating, but the evaporation of moisture causes the air pressure to increase, thereby causing the risk of explosion of the tank.

[0005] The invention discloses a device for removing moisture from transformer oil-paper insulation, comprising an insulating oil tank connected to a water removal tank, which is connected to a condensation tank. A condensation pipe is provided in the condensation tank, which is connected to a collection tank.

[0006] By setting up a condenser, after being heated and evaporated, the water vapor enters the condenser for condensation. The condensed water vapor forms water droplets and then enters the collection box for collection, thus avoiding the risk of explosion caused by the increase of internal air pressure due to the evaporation of water vapor in the water tank.

[0007] Furthermore, the condenser is provided with heat dissipation teeth.

[0008] Furthermore, the heat dissipation teeth are evenly distributed on the condenser tube, and the condenser tube has a curved structure.

[0009] When water vapor enters the condenser, the curved structure of the condenser can extend the flow path of the water vapor. Combined with the heat conduction effect of the heat dissipation teeth, it can facilitate the condensation of water vapor for moisture recovery and prevent the tank from bursting due to excessive air pressure.

[0010] Furthermore, a water pipe is connected between the collection box and the condensation box.

[0011] Furthermore, the lower end surface of the collection box is also connected to a drainage valve port.

[0012] Furthermore, the collection box is provided with a contact alarm siren.

[0013] Furthermore, a buoyancy plate is provided in the collection box, and the buoyancy plate is located directly below the alarm.

[0014] Furthermore, a slider is fixed to one end surface of the buoyancy plate, and the slider can slide up and down in the slot on the collection box.

[0015] When the water in the collection box increases, the buoyancy plate moves with the liquid surface under the action of buoyancy, and the sliding guide effect between the slider and the slot on the collection box can ensure that the buoyancy plate performs stable linear motion.

[0016] Furthermore, the dewatering tank is connected to a detection box, a micro-water transmitter for monitoring is fixed on the detection box, and a detection head of the micro-water transmitter is located in the detection box.

[0017] Furthermore, a first pump is fixed at one end of the detection box, and the first pump is connected to the dewatering tank. The other end of the detection box is connected to one end of an oil inlet pipe, and an electromagnetic valve and a filter box are connected to the oil inlet pipe. A filter screen for filtering impurities is fixed in the filter box. The other end of the oil inlet pipe is connected to a second pump, and the second pump is fixed on the insulating oil tank.

[0018] When the water content of the insulating oil in the test box exceeds the standard, the micro-water transmitter feedback signal, the solenoid valve is closed, and the first pump is started, thereby re-pumping the insulating oil in the test box into the water removal tank to achieve secondary water removal. According to the above principle, until the water content of the insulating oil in the test box reaches the standard (thereby effectively avoiding the physical properties of the oil paper being damaged due to excessive water content in the insulating oil), the first pump is closed, and the solenoid valve and the second pump are started, thereby pumping the insulating oil in the test box into the oil inlet pipe. When the insulating oil enters the filter box through the oil inlet pipe, the insulating oil can be filtered through the filter screen, thereby effectively preventing impurities in the insulating oil from entering the insulating oil tank and causing blockage, thereby ensuring the normal operation of the device.

[0019] Furthermore, a rotating shaft is connected to the filter box, and a cleaning component for cleaning the filter is provided on the rotating shaft.

[0020] When the insulating oil enters the filter box, the cleaning component is subjected to force under the action of the insulating oil, thereby driving the rotating shaft to rotate, and the cleaning component cleans the filter screen at the same time.

[0021] Furthermore, the cleaning component includes a fan plate, and the fan plate is connected to a scraper.

[0022] The contact and sliding action between the scraper and the filter can clean the debris on the surface of the filter, thereby ensuring the filtering effect of the filter.

[0023] Furthermore, a spring is connected between the scraper and the fan plate.

[0024] The spring can provide a force for the scraper to ensure the cleaning effect of the scraper on the filter.

[0025] Furthermore, a sealing gasket is provided on the contact surface between the fan plate and the filter box.

[0026] By setting a sealing gasket, a sealed space can be formed with the fan plate to ensure the force of the insulating oil pushing the fan plate.

[0027] Furthermore, a heating device is provided in the dewatering tank, and the heating device is connected to a driving device.

[0028] The heating device is driven to move by the driving device, so that the insulating oil can be heated.

[0029] Furthermore, the heating device is a heating tube.

[0030] The heating tube can heat the insulating oil, thereby evaporating the water in the insulating oil and removing water, thereby preventing the oil paper from being contaminated by water and destroying its physical properties.

[0031] Furthermore, the driving device is an electric telescopic rod.

[0032] Furthermore, an air duct and an air inlet pipe are provided in the dewatering box. The air inlet pipe passes through the dewatering box and is connected to the outside. The air duct extends to the bottom surface of the dewatering box. The air duct and the air inlet pipe are respectively provided with a one-way valve.

[0033] When the air pressure in the dewatering tank changes, the air inlet pipe draws air from the outside and sprays the gas out through the air guide pipe, thereby achieving a turbulent flow effect and ensuring uniform heating of the insulating oil.

[0034] Furthermore, a nozzle is provided on the air guide pipe.

[0035] Furthermore, the air guide pipe and the air inlet pipe are connected to a sealing cylinder, a piston is provided in the sealing cylinder, the piston is connected to one end of a rotatable connecting rod, the other end of the connecting rod is rotatably connected to a movable frame through a cylindrical shaft, the movable frame is connected to the driving device, and the heating device is evenly distributed below the movable frame.

[0036] By sliding the piston in the sealing cylinder, the sealing cylinder can be vented and exhausted, making it convenient to fully heat the insulating oil.

[0037] When the driving device drives the movable frame to move, the connecting rod is rotated by force, and the action of the connecting rod can provide a basic force for the movement of the piston.

[0038] The second object of the present invention is to protect a control method for a transformer oil-paper insulation moisture removal device, including a controller, which is respectively connected to an alarm, a micro-water transmitter, a first pump, a solenoid valve, and a second pump, and the alarm, the micro-water transmitter, the first pump, the solenoid valve, the second pump and the controller are all electrically connected. The micro-water transmitter can detect the moisture in the insulating oil and transmit the data to the controller. The controller controls the first pump, the solenoid valve, and the second pump to circulate or dry the insulating oil again.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. This transformer oil-paper insulation moisture removal device and control method utilizes a turbulent heating mechanism to achieve comprehensive heating of the insulating oil, thereby facilitating rapid evaporation of moisture in the insulating oil to achieve dehydration, preventing the oil-paper from being contaminated by moisture and damaging its physical properties. Combined with a condensing mechanism, it can achieve cooling and collection of water vapor, preventing the device from bursting due to excessive air pressure. Furthermore, a detection mechanism and a circulation mechanism can monitor the moisture in the insulating oil to ensure effective dehydration.

[0041] 2. A heating tube is provided. When heating the insulating oil, the movable frame and the heating tube are driven by the electric telescopic rod to heat the insulating oil. Combined with the exhaust function of the piston and the sealing cylinder, the gas can be ejected through the nozzle, thereby achieving a turbulent flow effect and ensuring the uniformity of the insulating oil heating;

[0042] 3. A condenser is provided. After evaporation by heat, the water vapor enters the condenser for condensation. The condensed water vapor forms water droplets, which then flow into the collection box through the water pipe for collection, thereby avoiding the risk of explosion caused by the increase of internal air pressure due to the evaporation of water vapor in the water tank;

[0043] 4. A filter is provided, through which the insulating oil entering the insulating oil tank can be filtered, thereby preventing impurities from flowing and clogging the pipeline, ensuring the normal operation of the device, and the scraper's cleaning effect on the filter can ensure the filtering effect of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the overall front view structure of the device of the present invention;

[0045] Figure 2 This is a schematic diagram of the cross-sectional structure of the water removal tank of the present invention;

[0046] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0047] Figure 4 This is a schematic diagram of the cross-sectional structure of the condenser box of the present invention;

[0048] Figure 5 This is a schematic diagram of the cross-sectional structure of the water tank of the present invention from the right side;

[0049] Figure 6 This is a schematic diagram of the front cross-sectional structure of the filter box of the present invention;

[0050] Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0051] Figure 8 This is a schematic diagram of the cross-sectional structure of the filter box of the present invention from the right side;

[0052] Figure 9 This is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention;

[0053] Figure 10 This is a schematic diagram of the operation flow of the overall device of the present invention;

[0054] Figure 11 This is a schematic diagram of the circuit connection of the control mechanism of the present invention.

[0055] In the figure: 1. Insulating oil tank; 2. Dewatering tank; 3. Electric telescopic rod; 4. Movable frame; 5. Heating pipe; 6. Connecting rod; 7. Sealing cylinder; 701. Piston; 8. Air guide pipe; 801. Nozzle; 9. Inlet pipe; 10. One-way valve; 11. Condenser; 1101. Heat dissipation gear; 12. Condensate tank; 13. Water guide pipe; 14. Collecting box; 15. Alarm; 16. Drain valve port; 17. Buoyancy plate; 1701. Slider; 18. Detection box; 19. Micro-water transmitter; 20. First pump; 21. Oil inlet pipe; 22. Solenoid valve; 23. Filter box; 24. Filter screen; 25. Rotating shaft; 2501. Fan plate; 2502. Sealing gasket; 26. Scraper; 27. Spring; 28. Second pump. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0057] Example 1

[0058] A device for removing moisture from transformer oil-paper insulation, the specific structure of which is as follows Figures 1-11As shown, it includes an insulating oil tank 1, which is connected to the dewatering tank 2 through a conduit, and an electric telescopic rod 3 is fixed to the upper end of the inner side of the dewatering tank 2, and a movable frame 4 is fixed to the output end of the electric telescopic rod 3, and a heating pipe 5 is fixed to the lower end face of the movable frame 4 for heating the insulating oil; it also includes: a sealing cylinder 7, which is fixed in the dewatering tank 2 symmetrically on the left and right, and an air guide pipe 8 is connected to the side of the sealing cylinder 7, and an air intake pipe 9 is connected to the upper end of the sealing cylinder 7, and the air intake pipe 9 passes through the upper end face of the dewatering tank 2, and a one-way valve 10 is connected to the air intake pipe 9 and the air guide pipe 8; a condenser 11, which is connected to the dewatering tank 2 through a conduit, and the condenser 11 is fixed in the condenser box 12, and the condenser box 12 is fixed to the upper end face of the dewatering tank 2, the right end of the condenser 11 is connected to one end of the water guide pipe 13, and the other end of the water guide pipe 13 is connected to the collecting box 14, and the collecting box 14 is fixed to the right end face of the dewatering tank 2, A contact alarm alarm 15 is fixed in the collection box 14, and the lower end surface of the collection box 14 is also connected to the drain valve port 16, and a buoyancy plate 17 is also provided in the collection box 14, and the buoyancy plate 17 is located directly below the alarm 15; the detection box 18 is connected to the dewatering tank 2 through a conduit, and a micro-water transmitter 19 is fixed on the detection box 18, and the micro-water transmitter 19 detection head is located in the detection box 18 to realize the monitoring function. At the same time, a first pump 20 is fixed to the left end of the detection box 18, and the first pump 20 is connected to the dewatering tank 2 through a conduit. The right end of the detection box 18 is connected to one end of the oil inlet pipe 21, and the oil inlet pipe 21 is also connected to the solenoid valve 22 and the filter box 23, and a filter screen 24 is fixed in the filter box 23 for filtering impurities. At the same time, a rotating shaft 25 is also connected to the bearing in the filter box 23. The other end of the oil inlet pipe 21 is connected to the second pump 28, and the second pump 28 is fixed on the insulating oil tank 1.

[0059] The heating tube 5 can be moved up and down under the action of the electric telescopic rod 3, and the moving distance of the heating tube 5 is less than the distance between the movable frame 4 and the air guide tube 8, and the heating tube 5 is evenly spaced on the movable frame 4; the sealing cylinder 7 is also connected to a piston 701, and the piston 701 and the sealing cylinder 7 are in sliding connection; the piston 701 is connected to one end of a rotatable connecting rod 6 through a cylindrical shaft, and the other end of the connecting rod 6 is rotatably connected to the upper end face of the movable frame 4 through a cylindrical shaft, and the connecting rod 6 is symmetrically distributed about the center line of the movable frame 4; the air guide tube 8 is also connected to a nozzle 801, and the nozzle 801 is fixed at equal intervals on the lower end face of the dewatering tank 2; the condensing tube 11 is also fixed with heat dissipation teeth 1101 at equal intervals, and the condensing tube 11 is a curved structure; the left end face of the buoyancy plate 17 is also fixed with a slider 1701, and the slider 1 701 is nested in the slot on the collection box 14 and can slide up and down; a fan plate 2501 and a sealing gasket 2502 are also provided on the rotating shaft 25; the fan plate 2501 is fixed on the rotating shaft 25 at equal angles, and the fan plate 2501 is set in the filter box 23; the sealing gasket 2502 is fixed on the fan plate 2501 symmetrically front and back, and the sealing gasket 2502 contacts the inner wall of the filter box 23 and can slide; the fan plate 2501 is also slidably connected to the scraper 26, and the scraper 26 contacts the filter screen 24 and can slide; one end of the spring 27 is also fixed on the scraper 26, and the other end of the spring 27 is fixed in the fan plate 2501, and the scraper 26 forms an elastic mechanism between the spring 27 and the fan plate 2501, and the spring 27 can provide a force for the scraper 26 to ensure the cleaning effect of the scraper 26 on the filter screen 24.

[0060] Working principle: When using the transformer oil-paper insulation moisture removal device, first install the device as follows: Figure 1 Connect as shown, and power the entire device through an external power supply. Figure 1 、 Figure 2 、 Figure 3As shown, the insulating oil in the insulating oil tank 1 enters the dewatering tank 2 through the conduit to achieve the dewatering effect. At this time, the electric telescopic rod 3 is started to extend and retract in an orderly manner, thereby driving the movable frame 4 and the heating tube 5 to move up and down in an orderly manner. With the action of the heating tube 5, the insulating oil in the dewatering tank 2 can be heated, thereby evaporating the water in the insulating oil. When the movable frame 4 moves, the connecting rod 6 is forced to rotate. Through the action of the connecting rod 6, the piston 701 is forced to slide in the sealing cylinder 7, thereby achieving the sealing cylinder 7 has an exhaust function. When the sealing cylinder 7 is inhaling air, the one-way valve 10 on the air guide pipe 8 is closed, and the one-way valve 10 on the air inlet pipe 9 is opened. The gas enters the sealing cylinder 7 through the air inlet pipe 9. When the sealing cylinder 7 is exhausting air, the one-way valve 10 on the air guide pipe 8 is opened, and the one-way valve 10 on the air inlet pipe 9 is closed. At this time, the gas in the sealing cylinder 7 is guided by the air guide pipe 8 and discharged through the nozzle 801, thereby generating bubbles, realizing a disturbing effect on the insulating oil in the dewatering tank 2, and ensuring the uniformity of heating of the insulating oil in the dewatering tank 2;

[0061] During the heating process of the insulating oil, the water in the insulating oil evaporates, such as Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the evaporated water vapor and air enter the condenser 11 through the conduit, achieving a pressure reduction effect. The curved structure of the condenser 11 can extend the flow path of the water vapor, and the heat dissipation teeth 1101 can increase the heat dissipation area. The condenser box 12 can condense the water vapor in the condenser 11 into water droplets, and finally the water droplets and air enter the collection box 14 through the water guide pipe 13. The air is discharged through the upper opening in the collection box 14, and the water droplets are collected in the collection box 14. During long-term use, as the water level in the collection box 14 rises, the buoyancy plate 17 moves upward at the same time under the action of buoyancy, and the sliding action between the slider 1701 and the groove on the collection box 14 can ensure the stability of the movement of the buoyancy plate 17. When the buoyancy plate 17 moves to contact the alarm 15, the alarm 15 starts to transmit a signal to the controller, and the controller feeds back a signal to remind the staff to drain the water in time by opening the drain valve 16 to ensure the normal operation of the device.

[0062] The insulating oil after heating and dehydration enters the detection box 18 through the conduit. Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown, the insulating oil entering the detection box 18 can be detected by the micro-water transmitter 19. When the water content of the insulating oil in the detection box 18 exceeds the standard, the micro-water transmitter 19 feeds back a signal to the controller, and the solenoid valve 22 is closed, and the first pump 20 is started, thereby re-pumping the insulating oil in the detection box 18 into the water removal tank 2 to achieve secondary water removal. According to the above principle, until the water content of the insulating oil in the detection box 18 meets the standard (thereby effectively avoiding the damage to the physical properties of the oil paper caused by excessive water content in the insulating oil), the first pump 20 is closed, and the solenoid valve 22 and the second pump 28 are started, thereby pumping the insulating oil in the detection box 18 into the oil inlet pipe 21. When the insulating oil enters the filter box through the oil inlet pipe 21 23, at this time, the insulating oil can be filtered through the filter screen 24, thereby effectively preventing impurities in the insulating oil from entering the insulating oil tank 1 and causing blockage, ensuring the normal operation of the device, and when the insulating oil enters the filter box 23, the fan plate 2501 can be subjected to force under the action of the insulating oil, thereby driving the fan plate 2501 and the rotating shaft 25 to rotate, and then driving the scraper 26 to rotate, and the contact and sliding action between the scraper 26 and the filter screen 24 can achieve the cleaning of debris on the surface of the filter screen 24, thereby ensuring the filtering effect of the filter screen 24, and when the scraper 26 contacts the filter screen 24, the spring 27 can provide a force to the scraper 26 to ensure the cleaning effect of the scraper 26 on the filter screen 24.

[0063] Example 2

[0064] A control method for a transformer oil-paper insulation moisture removal device includes a controller, which is respectively connected to an alarm 15, a micro-water transmitter 19, a first pump 20, a solenoid valve 22, and a second pump 28. The alarm 15, the micro-water transmitter 19, the first pump 20, the solenoid valve 22, and the second pump 28 are all electrically connected to the controller. The micro-water transmitter 19 can detect moisture in the insulating oil and transmit data to the controller. The controller controls the first pump 20, the solenoid valve 22, and the second pump 28 to circulate or dry the insulating oil again, thereby avoiding the presence of moisture in the insulating oil and further preventing the oil paper from being contaminated by moisture and causing changes in physical properties. The alarm 15 can be used to provide a water level alarm so that staff can drain the water and perform maintenance in a timely manner.

[0065] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various forms of implementation methods based on the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the scope of protection of this embodiment. The scope of protection of this embodiment shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A device for removing moisture from transformer oil-paper insulation, characterized in that: The invention comprises an insulating oil tank (1), wherein the insulating oil tank (1) is connected to a dewatering tank (2), wherein the dewatering tank (2) is connected to a condensing tank (12), wherein a condensing pipe (11) is arranged in the condensing tank (12), wherein the condensing tank (12) is connected to a collecting tank (14), wherein a heating device is arranged in the dewatering tank (2), wherein the heating device is connected to a driving device, wherein an air guide pipe (8) and an air intake pipe (9) are arranged in the dewatering tank (2), wherein the air intake pipe (9) passes through the dewatering tank (2) and is connected to the outside, and wherein the air guide pipe (8) extends To the bottom surface of the dewatering tank (2), the air guide pipe (8) and the air intake pipe (9) are respectively provided with a one-way valve (10), the air guide pipe (8) and the air intake pipe (9) are connected to a sealing cylinder (7), a piston (701) is provided in the sealing cylinder (7), the piston (701) is connected to one end of a rotatable connecting rod (6), the other end of the connecting rod (6) is rotatably connected to a movable frame (4) via a cylindrical shaft, the movable frame (4) is connected to the driving device, and the heating device is evenly distributed below the movable frame (4); When the transformer oil-paper insulation moisture removal device is used, the driving device drives the movable frame (4) and the heating device to move. The heating device can heat the insulating oil in the dewatering tank (2), thereby evaporating the moisture in the insulating oil. When the movable frame (4) moves, the connecting rod (6) is forced to rotate. Through the action of the connecting rod (6), the piston (701) can be forced to slide in the sealing cylinder (7), thereby realizing the exhaust function of the sealing cylinder (7). When the sealing cylinder (7) is inhaling air, the one-way valve (10) on the air guide pipe (8) is closed, the one-way valve (10) on the air intake pipe (9) is opened, and the gas enters the sealing cylinder (7) through the air intake pipe (9). When the sealing cylinder (7) is exhausted, the one-way valve (10) on the air guide pipe (8) is opened, and the one-way valve (10) on the air intake pipe (9) is closed. At this time, the gas in the sealing cylinder (7) is guided through the air guide pipe (8).

2. A transformer oil-paper insulation moisture removal device according to claim 1, characterized in that: The dewatering box (2) is connected to a detection box (18), a micro-water transmitter (19) for implementing a monitoring function is fixed on the detection box (18), and a detection head of the micro-water transmitter (19) is located inside the detection box (18).

3. A transformer oil-paper insulation moisture removal device according to claim 2, characterized in that: A first pump (20) is fixed to one end of the detection box (18), and the first pump (20) is connected to the dewatering box (2). The other end of the detection box (18) is connected to one end of an oil inlet pipe (21), and the oil inlet pipe (21) is connected to a solenoid valve (22) and a filter box (23). A filter screen (24) for filtering impurities is fixed in the filter box (23). The other end of the oil inlet pipe (21) is connected to a second pump (28), and the second pump (28) is fixed to the insulating oil tank (1).

4. A transformer oil-paper insulation moisture removal device according to claim 3, characterized in that: A rotating shaft (25) is also connected to the filter box (23), and a cleaning component for cleaning the filter screen (24) is provided on the rotating shaft (25).

5. A transformer oil-paper insulation moisture removal device according to claim 4, characterized in that: The cleaning component comprises a fan plate (2501), and the fan plate (2501) is connected to a scraper (26).

6. A transformer oil-paper insulation moisture removal device according to claim 1, characterized in that: The heating device is a heating tube (5).

7. The control method of a transformer oil-paper insulation moisture removal device according to claim 3, characterized in that: The transformer oil-paper insulation moisture removal device further comprises a controller and an alarm (15), and the alarm (15), a micro-water transmitter (19), a first pump (20), an electromagnetic valve (22), and a second pump (28) are all electrically connected to the controller. The micro-water transmitter (19) can detect the moisture in the insulating oil and transmit the data to the controller. The controller controls the first pump (20), the electromagnetic valve (22), and the second pump (28) to realize the circulation or re-drying of the insulating oil.

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