Cooling device of oil-air cooled transformer

Abstract

The utility model provides a cooling device for a forced oil and air-cooled transformer, and relates to the technical field of transformer cooling systems. The cooling device for the forced oil and air-cooled transformer comprises: a heat dissipation device, which forms an oil circulation loop with the oil tank through a connecting pipe, and the oil in the oil tank enters the heat dissipation device for heat dissipation, and the oil after heat dissipation is sent back to the oil tank through the oil circulation loop; a temperature measuring device, which is used to detect the temperature of the oil entering the heat dissipation device; an oil driving component, which is used to drive the oil to flow in the oil circulation loop and adjust the flow rate of the oil flowing through the heat dissipation device. The cooling device for the forced oil and air-cooled transformer can adjust the flow rate of the oil flowing through the heat dissipation device, so as to better cool the oil, and solves the problem in the prior art that the oil in the forced oil transformer cannot be well cooled, which affects the stable operation of the forced oil transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer cooling systems, in particular to a cooling device for a strong oil-air-cooled transformer. Background Art

[0002] In power transmission and transformation systems, transformers are the most fundamental and crucial equipment for converting electrical energy, significantly impacting power supply reliability. Transformers experience both no-load and load losses during operation. Transformer temperature rise affects its load-carrying capacity and accelerates the aging of insulation materials used in transformer windings and cores, shortening the transformer's operating life. Transformer oil temperature is one of the key parameters that require monitoring and tracking during transformer operation. Prolonged operation at low oil temperatures helps extend transformer life, improve transmission capacity and overload resistance, and ensure operational performance and shock resistance.

[0003] Transformer coolers control oil temperature to ensure continuous and normal transformer operation. Transformer oil temperature fluctuates due to load fluctuations. To ensure safe, stable, and economical operation, a cooler is used to control oil temperature fluctuations and maintain it within a stable range. Currently, when cooling the oil in oil-reinforced transformers, a variable frequency drive (VFD) is typically added to the oil pump to assist in cooling the oil. While the VFD regulates the oil flow rate and helps cool the oil, it also generates harmonics during operation, which can affect motor stability and even damage the motor or other electrical equipment. Harmonics can also pollute the power grid, impacting the normal operation of other equipment and increasing maintenance and replacement costs. While VFDs effectively regulate motor speed, they can also generate energy losses during the conversion process, reducing overall system efficiency. This is particularly noticeable when operating high-power motors.

[0004] Therefore, there is an urgent need for a device that can solve at least one of the above problems. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a cooling device for a forced oil-air-cooled transformer, which is used to solve the problem in the prior art that the oil in the forced oil transformer cannot be well cooled, affecting the stable operation of the forced oil transformer.

[0006] In order to achieve the above object, the present invention provides a cooling device for a transformer with oil-cooled air, the cooling device comprising:

[0007] The heat dissipation device forms an oil circulation loop with the oil tank of the forced oil-air-cooled transformer through a connecting pipe. The oil in the oil tank enters the heat dissipation device to dissipate heat, and the heat-dissipated oil is returned to the oil tank through the oil circulation loop.

[0008] a temperature measuring device, used for detecting the temperature of the oil entering the heat dissipation device;

[0009] An oil driving assembly is provided on the communicating pipe between the oil tank and the heat dissipation device, is connected to the temperature measuring device, and is used for driving the oil to flow in the oil circulation loop and adjusting the flow rate of the oil flowing through the heat dissipation device.

[0010] Specifically, the oil circulation loop includes: an oil inlet pipeline and an oil return pipeline;

[0011] The heat dissipation device is connected to the oil tank through the oil inlet pipe and the oil return pipe. The oil in the oil tank flows out from the oil outlet of the oil tank, flows through the oil inlet pipe, the heat dissipation device and the oil return pipe, and then flows into the oil tank again through the oil return port of the oil tank.

[0012] Specifically, the heat dissipation device includes: a plurality of cooling fans and a plurality of heat sinks;

[0013] The plurality of heat sinks are arranged at a given interval, an oil channel is provided in each heat sink, and the oil channels of two adjacent heat sinks are connected to each other, and the plurality of heat sinks are connected to the oil tank through the oil inlet pipe and the oil return pipe;

[0014] A plurality of cooling fans are movably connected to corresponding heat sinks and are used for supplying air to the corresponding heat sinks to dissipate heat from the oil flowing through the oil channels of the heat sinks.

[0015] Specifically, the heat dissipation device further includes: a bracket assembly, and a plurality of cooling fans are movably connected to corresponding heat sinks through the bracket assembly.

[0016] Specifically, the support assembly includes: a support base, a crossbeam, a support driver and two guide rods;

[0017] Two guide rods are vertically arranged on the bracket seat, and the two guide rods are respectively connected to a corresponding heat sink;

[0018] The crossbeam is slidably connected to the two guide rods, and a plurality of cooling fans are arranged on the crossbeam;

[0019] The support driver is arranged on the support seat and is used for driving the crossbeam to move along the extending direction of the guide rod.

[0020] Specifically, the bracket assembly further includes: a storage frame, which is arranged on the crossbeam and located between the cooling fan and the heat sink, and is used for storing dry ice.

[0021] Specifically, a storage groove for storing dry ice is provided on a surface of the bracket seat facing the heat sink.

[0022] Specifically, the cooling device of the forced oil-air-cooled transformer also includes: two control valves, one control valve is respectively provided on the oil inlet pipeline and the oil return pipeline, and the control valve is used to control the flow state of oil in the oil inlet pipeline and the oil return pipeline.

[0023] Specifically, the temperature measuring device includes: an optical fiber probe, which is arranged in the oil inlet pipeline and is connected to the cooling controller signal to detect the temperature of the oil entering the heat dissipation device.

[0024] Specifically, the oil drive assembly includes: a conventional submersible pump and a continuously variable speed submersible pump;

[0025] The conventional submersible pump and the stepless speed submersible pump are both arranged on the oil return pipeline and are both connected to the cooling controller signal;

[0026] The conventional submersible pump is used to drive the oil to flow in the oil circulation loop in response to a start signal from the cooling controller;

[0027] The stepless speed submersible oil pump is used to adjust the flow rate of the oil flowing through the heat sink in response to the flow rate signal of the cooling controller.

[0028] The utility model provides a cooling device for a forced oil-air-cooled transformer. The oil driving assembly drives the oil to flow in an oil circulation loop. Under the drive of the oil driving assembly, the oil flows out of the oil tank of the forced oil-air-cooled transformer and enters the heat sink. The oil can dissipate heat through the heat sink when flowing through the heat sink. The heat-dissipated oil is then returned to the oil tank through the oil driving assembly, thus forming an oil circulation loop. To better dissipate heat for the oil, a temperature measuring device detects the temperature of the oil entering the heat sink. The oil driving assembly drives the oil to flow in the oil circulation loop according to a start command to dissipate heat. The oil driving assembly can also adjust the flow rate of the oil through the heat sink according to a flow rate adjustment instruction. By adjusting the flow rate of the oil through the heat sink, the duration and amount of the oil flowing through the heat sink can be controlled, thereby better dissipating heat for the oil. The utility model provides a cooling device for a forced oil-air-cooled transformer. The flow rate of the oil through the heat sink can be adjusted to better cool the oil, thereby solving the problem in the prior art that the oil in the forced oil transformer cannot be properly cooled, which affects the stable operation of the forced oil transformer.

[0029] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic structural diagram of a cooling device for a forced oil-air-cooled transformer provided by the utility model;

[0032] Figure 2 The utility model is a schematic diagram of the installation of a bracket assembly of a cooling device for a forced oil-air-cooled transformer provided by the utility model.

[0033] Description of Reference Numerals

[0034] 1-Heat dissipation device; 2-Temperature measuring device; 3-Oil drive assembly; 4-Control valve; 5-Oil tank; 11-Oil inlet pipe; 12-Oil return pipe; 13-Cooling fan; 14-Heat sink; 15-Bracket assembly; 21-Fiber optic probe; 31-Conventional submersible pump; 32-Infinitely variable speed submersible pump; 151-Bracket seat; 152-Crossbeam; 153-Bracket driver; 154-Guide rod; 155-Storage frame; 156-Storage slot. DETAILED DESCRIPTION

[0035] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not intended to limit the embodiment of the present invention.

[0036] Figure 1 This is a structural diagram of the cooling device of the oil-air cooled transformer. Figure 2 This is a schematic diagram of the installation of the bracket assembly of the cooling device of the forced oil-air-cooled transformer.

[0037] like Figure 1-Figure 2 As shown, the cooling device of the oil-air-cooled transformer provided by the present invention includes:

[0038] The heat sink 1 and the oil tank 5 of the forced oil-air-cooled transformer form an oil circulation loop through a connecting pipe. The oil in the oil tank 5 enters the heat sink 1 to dissipate heat, and the heat-dissipated oil is returned to the oil tank 5 through the oil circulation loop.

[0039] The temperature measuring device 2 is used to detect the temperature of the oil entering the heat dissipation device 1;

[0040] The oil drive component 3 is arranged on the connecting pipe between the oil tank 5 and the heat dissipation device 1, and is connected to the temperature measuring device 2, and is used to drive the oil to flow in the oil circulation loop and adjust the flow rate of the oil flowing through the heat dissipation device 1.

[0041] The utility model provides a cooling device for a strong oil-air-cooled transformer, in which a pipeline between the heat sink 1 and the oil tank 5 of the strong oil-air-cooled transformer forms an oil circulation loop, and the oil in the oil tank 5 first enters the heat sink 1 through the oil circulation loop for heat dissipation, and the oil after heat dissipation returns to the oil tank 5 through the oil circulation loop, and the oil driving component 3 drives the oil in the oil tank 5 of the strong oil-air-cooled transformer into the heat sink 1 according to the start instruction of the cooling controller, and the oil can be dissipated through the heat sink 1 in the process of flowing through the heat sink 1, thereby cooling the oil. After the oil is cooled, in order to better dissipate the heat of the oil in the heat sink 1, the oil driving component 3 adjusts the flow rate of the oil flowing through the heat sink 1 according to the flow rate adjustment instruction, thereby controlling the time and flow rate of the oil flowing through the heat sink 1, which is beneficial to the heat dissipation of the oil. After the oil is cooled, the oil driving component 3 is again The oil after heat dissipation is driven back to the oil tank 5, the temperature measuring device 2 detects the temperature of the oil entering the heat dissipation device 1, and the cooling controller outputs corresponding instructions to the oil drive component 3 according to the oil temperature. The oil drive component 3 performs corresponding actions according to the corresponding instructions. If the oil temperature is within the first temperature range, the cooling controller outputs a start instruction, and the oil drive component 3 acts according to the start instruction to pump the oil in the oil tank 5 into the heat dissipation device 1 and send the oil after heat dissipation back to the oil tank 5 again. If the oil temperature is within the second temperature range, the cooling controller outputs a flow rate adjustment instruction, and the oil drive component 3 acts according to the flow rate adjustment instruction to adjust the flow rate of the oil flowing through the heat dissipation device 1, so as to better dissipate heat in the heat dissipation device 1, solving the problem in the prior art that the oil in the strong oil transformer cannot be well cooled, affecting the stable operation of the strong oil transformer.

[0042] In one embodiment, Figure 1 As shown, the oil circulation circuit includes: an oil inlet pipeline 11 and an oil return pipeline 12;

[0043] The heat dissipation device 1 is connected to the oil tank 5 through the oil inlet pipe 11 and the oil return pipe 12. The oil in the oil tank 5 flows out from the oil outlet of the oil tank 5, flows through the oil inlet pipe 11, the heat dissipation device 1 and the oil return pipe 12, and then flows into the oil tank 5 again through the oil return port of the oil tank 5.

[0044] The heat dissipation device 1 includes: a plurality of cooling fans 13 and a plurality of heat sinks 14;

[0045] The plurality of heat sinks 14 are arranged at a given interval, each heat sink 14 is provided with an oil channel, and the oil channels of two adjacent heat sinks 14 are connected to each other. The plurality of heat sinks 14 are connected to the oil tank 5 through the oil inlet pipe 11 and the oil return pipe 12;

[0046] The plurality of cooling fans 13 are movably connected to the corresponding heat sinks 14 for supplying air to the corresponding heat sinks 14 to dissipate heat from the oil flowing through the oil channels of the heat sinks 14 .

[0047] A plurality of heat sinks 14 are arranged in parallel with each other at a given interval to form a heat sink assembly. The two ends of the oil channel of each heat sink 14 are heat sink oil inlets and outlets. The heat sink oil inlets and outlets of the plurality of heat sinks 14 are interconnected so that the oil channels of the plurality of heat sinks 14 are interconnected. The oil inlet and outlet of one heat sink 14 is used as the oil inlet of the heat sink assembly, and the oil inlet and outlet of the other heat sink 14 is used as the oil outlet of the heat sink assembly. The oil outlet of the oil tank 5 is connected to the oil inlet of the heat sink assembly through the oil inlet pipe 11, and the oil return port of the oil tank 5 is connected to the oil outlet of the heat sink assembly through the oil return pipe 12. The oil in the oil tank 5 is connected to the oil outlet of the heat sink assembly through the oil return pipe 12. The oil flows out of the oil outlet of the oil tank 5, enters the heat sink 1 after passing through the oil inlet pipe 11, and flows through the oil channel of each heat sink 14. When the oil flows through the oil channel of each heat sink 14, the cooling fan 13 sends air to the heat sink 14, so that the heat of the oil flowing through the oil channel of each heat sink 14 is taken away by the air sent to the heat sink 14, thereby cooling the oil. Multiple cooling fans 13 are movably connected to the heat sinks 14 corresponding to the bracket assembly 15, which facilitates the cooling fans 13 to send air to the heat sink 14. The oil after heat dissipation flows out of the heat sink 1 from the main oil outlet, and then returns to the oil tank 5 through the return oil pipe 12 and the oil return port of the oil tank 5.

[0048] In order to enable the cooling fan 13 to better remove the heat of the oil flowing through the heat dissipation device 1, the bracket assembly 15 includes: a bracket seat 151, a crossbeam 152, a bracket driver 153 and two guide rods 154;

[0049] Two guide rods 154 are vertically arranged on the bracket seat 151, and the two guide rods 154 are respectively connected to a corresponding heat sink 14;

[0050] The crossbeam 152 is slidably connected to two guide rods 154 , and a plurality of cooling fans 14 are disposed on the crossbeam 152 ;

[0051] The support driver 153 is disposed on the support seat 151 and is used to drive the crossbeam 152 to move along the extending direction of the guide rod 154 .

[0052] The crossbeam 152 includes: a transverse rod portion and two connecting rod portions;

[0053] Two connecting rods are respectively provided at both ends of the transverse rod, and each connecting rod is slidably connected to a corresponding guide rod 154;

[0054] A plurality of cooling fans 14 are provided on the transverse rods.

[0055] The two guide rods 154 are respectively connected to the two heat sinks 14 on the side, the bracket seat 151 is set at the near-ground end of the guide rod 154, the two connecting rod portions of the beam 152 are slidably set on the corresponding guide rods 154, the cooling fan 13 is set on the transverse rod portion of the beam 152, and the bracket driver 153 set on the bracket seat 151 drives the beam 152 to move in the extension direction of the guide rod 154, and can flexibly adjust the air supply position of the cooling fan 13 to better help dissipate heat from the oil.

[0056] like Figure 2 As shown, in order to speed up the cooling of the oil flowing through the heat sink 14, the bracket assembly 15 further includes: a storage frame 155, which is arranged on the crossbeam 152 and located between the cooling fan 13 and the heat sink 14, and is used to store dry ice.

[0057] A storage slot 156 for storing dry ice is defined on a surface of the bracket 151 facing the heat sink 14 .

[0058] A storage frame 155 is hung on the crossbeam 152. The storage frame 155 is made of wire mesh. The wire mesh storage frame 155 can reduce the obstruction of the wind sent from the cooling fan 13 to the heat sink 14. The storage frame 155 is symmetrically provided with connecting ears. The storage frame 155 is connected to the crossbeam 152 through the connecting ears. The storage frame 155 is arranged between the cooling fan 13 and the heat sink 14. Dry ice is placed in the storage frame 155. The sublimation of the dry ice causes the ambient temperature to drop rapidly. The temperature of the wind blown from the cooling fan 13 to the heat sink is reduced, which can better cool the oil flowing through the heat sink 14. Dry ice is placed in the storage groove 156 provided on the bracket seat 151. The sublimation of the dry ice in the storage groove 156 reduces the ambient temperature, which is beneficial to cooling the oil in the heat sink 14.

[0059] In order to flexibly control the oil inflow and outflow of the heat dissipation device 1, the cooling device of the oil-air-cooled transformer further includes: two control valves 4, one of which is provided on the oil inlet pipe 11 and the other on the oil return pipe 12. The control valves 4 are used to control the flow state of the oil in the oil inlet pipe 11 and the other on the oil return pipe 12. Figure 1 As shown, a control valve 4 is installed on the oil inlet pipe 11 and the oil return pipe 12 respectively. When the control valve 4 set on the oil inlet pipe 11 is opened, the oil in the oil tank 5 can enter the heat dissipation device 1 through the oil inlet pipe 11 for heat dissipation. When the control valve 4 on the oil inlet pipe 11 is closed, the oil in the oil tank 5 cannot enter the heat dissipation device 1. When the control valve 4 on the oil return pipe 12 is opened, the oil after heat dissipation can return to the oil tank 5 through the oil return pipe 12. When the control valve 4 on the oil return pipe 12 is closed, the oil after heat dissipation cannot return to the oil tank 5.

[0060] In order to adjust the flow rate of the oil flowing through the heat sink 1 , the temperature measuring device 2 includes: an optical fiber probe 21 , which is arranged in the oil inlet pipe 11 and is connected to the cooling controller signal for detecting the temperature of the oil entering the heat sink 1 .

[0061] The oil drive assembly 3 includes: a conventional submersible pump 31 and a continuously variable speed submersible pump 32;

[0062] The conventional submersible pump 31 and the stepless speed submersible pump 32 are both arranged on the oil return pipe 12 and are both connected to the cooling controller signal, wherein:

[0063] The conventional submersible pump 31 is used to drive the oil to flow in the oil circulation loop in response to the start signal of the cooling controller;

[0064] The continuously variable speed submersible oil pump 32 is used to adjust the flow rate of the oil flowing through the heat sink in response to the flow rate adjustment signal of the cooling controller.

[0065] The optical fiber probe 21 detects the temperature of the oil entering the heat sink 1 and sends it to the cooling controller. The cooling controller determines the oil temperature range. When the oil temperature is at the first temperature, the cooling controller outputs a start instruction according to the detected oil temperature. The conventional submersible pump 31 responds to the start signal corresponding to the start instruction to drive the oil to flow in the oil circulation loop. When the oil flows to the heat sink 1, it dissipates heat through the heat sink 1. After the heat dissipation is completed, the oil returns to the oil tank 5 again. When the oil temperature is at the first temperature, only the conventional submersible pump 31 is started to drive the oil to flow through the heat sink 1 to dissipate heat to achieve the oil temperature. The safety standard of temperature, when the oil temperature is at the second temperature, which is greater than the first temperature, the cooling controller outputs a flow rate adjustment instruction according to the detected oil temperature, and the continuously variable speed submersible oil pump 32 responds to the flow rate adjustment signal corresponding to the flow rate adjustment instruction to adjust the flow rate of the oil flowing through the heat sink 1 when the oil in the pumping tank 5 flows through the heat sink 1, ensuring that the flow rate of the oil flowing through the heat sink 1 is accurately controlled, ensuring that the oil can dissipate heat stably and quickly. When the oil temperature is at the second temperature, the continuously variable speed submersible oil pump 32 is actuated while the conventional submersible oil pump 31 continues to operate to drive the oil flow. Among them, the start instruction and the flow rate adjustment instruction can be manually triggered and adjusted by buttons or the like.

[0066] In one embodiment, the cooling device of the oil-air-cooled transformer further includes:

[0067] The cooling controller is connected to the temperature measuring device 2 and the oil driving component 3 by signal, and is used to output corresponding instructions to the oil driving component 3 according to the oil temperature;

[0068] The oil drive assembly 3 is used to drive the oil to flow in the oil circulation loop in response to a start signal from the cooling controller, and to adjust the flow rate of the oil through the heat sink 1 in response to a flow rate adjustment signal from the cooling controller. More specifically, a conventional submersible oil pump 31 is used to drive the oil to flow in the oil circulation loop in response to a start signal from the cooling controller; and a continuously variable speed submersible oil pump 32 is used to adjust the flow rate of the oil through the heat sink in response to a flow rate adjustment signal from the cooling controller.

[0069] The cooling device of the forced oil-air-cooled transformer also includes a display, which is arranged on the cooling controller and is connected to the temperature measuring device 2 signal to display the oil temperature, so that the staff can know the oil temperature in time.

[0070] On the other hand, the present application provides a cooling method for a forced oil-air-cooled transformer, which is implemented based on any of the cooling devices for forced oil-air-cooled transformers described above. The cooling method for a forced oil-air-cooled transformer comprises:

[0071] The temperature of the oil entering the heat sink 1 is detected by the temperature measuring device 2. The heat sink 1 and the oil tank 5 of the forced oil-air-cooled transformer form an oil circulation loop through a connecting pipe. The oil in the oil tank 5 enters the heat sink 1 to dissipate heat, and the oil after dissipation is returned to the oil tank 5 through the oil circulation loop.

[0072] The cooling controller is used to control the operation of the oil driving component 3 according to the oil temperature to drive the oil to flow in the oil circulation loop and / or adjust the flow rate of the oil flowing through the heat dissipation device 1 to achieve heat dissipation.

[0073] The cooling method of the strong oil-air-cooled transformer provided by the utility model controls the action of the oil driving component 3 according to the oil temperature. When the oil temperature is at a first temperature, the oil driving component 3 drives the oil to flow in the oil circulation loop. After the oil enters the heat dissipation device 1, the heat is dissipated. The oil after heat dissipation is returned to the oil tank 5 again. When the oil temperature is at a second temperature, the oil driving component 3 adjusts the flow rate of the oil flowing through the heat dissipation device 1, thereby better dissipating the heat of the oil.

[0074] The utility model provides a cooling device for a forced oil-air-cooled transformer. The oil driving assembly drives the oil to flow in an oil circulation loop. Under the drive of the oil driving assembly, the oil flows out of the oil tank of the forced oil-air-cooled transformer and enters the heat sink. When the oil tank flows through the heat sink, the oil can dissipate heat through the heat sink. The heat-dissipated oil is then returned to the oil tank through the oil driving assembly, thus forming an oil circulation loop. To better dissipate heat for the oil, a temperature measuring device detects the temperature of the oil entering the heat sink. The oil driving assembly drives the oil to flow in the oil circulation loop according to a start command to dissipate heat. The oil driving assembly can also adjust the flow rate of the oil through the heat sink according to a flow rate adjustment instruction. By adjusting the flow rate of the oil through the heat sink, the duration and amount of the oil flowing through the heat sink can be controlled, thereby better dissipating heat for the oil. The utility model provides a cooling device for a forced oil-air-cooled transformer. The flow rate of the oil through the heat sink can be adjusted to better cool the oil, thereby solving the problem in the prior art that the oil in the forced oil transformer cannot be properly cooled, which affects the stable operation of the forced oil transformer.

[0075] The above describes in detail the optional implementation methods of the embodiment of the present invention in conjunction with the accompanying drawings. However, the embodiment of the present invention is not limited to the specific details in the above implementation methods. Within the technical concept of the embodiment of the present invention, the technical solution of the embodiment of the present invention can be subjected to various simple modifications, and these simple modifications all fall within the protection scope of the embodiment of the present invention.

[0076] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the embodiments of the present utility model will not further describe various possible combinations.

[0077] In addition, the various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A cooling device for a strong oil-air-cooled transformer, characterized in that: The cooling device of the oil-air-cooled transformer comprises: The heat dissipation device (1) and the oil tank (5) of the oil-air-cooled transformer form an oil circulation loop through a connecting pipe, the oil in the oil tank (5) enters the heat dissipation device (1) to dissipate heat, and the oil after dissipation of heat is returned to the oil tank (5) through the oil circulation loop; A temperature measuring device (2) for detecting the temperature of the oil entering the heat dissipation device (1); An oil driving component (3) is arranged on a connecting pipe between the oil tank (5) and the heat dissipation device (1), connected to the temperature measuring device (2), and used for driving the oil to flow in the oil circulation loop and adjusting the flow rate of the oil flowing through the heat dissipation device (1).

2. The cooling device for the oil-air-cooled transformer according to claim 1 is characterized in that: The oil circulation loop comprises: an oil inlet pipeline (11) and an oil return pipeline (12); The heat dissipation device (1) is connected to the oil tank (5) via the oil inlet pipe (11) and the oil return pipe (12); the oil in the oil tank (5) flows out from the oil outlet of the oil tank (5), flows through the oil inlet pipe (11), the heat dissipation device (1) and the oil return pipe (12), and then flows into the oil tank (5) again through the oil return port of the oil tank (5).

3. The cooling device for the oil-air-cooled transformer according to claim 2 is characterized in that: The heat dissipation device (1) comprises: a plurality of cooling fans (13) and a plurality of heat sinks (14); A plurality of heat sinks (14) are arranged at a given interval, an oil channel is provided in each heat sink (14), and the oil channels of two adjacent heat sinks (14) are connected to each other, and the plurality of heat sinks (14) are connected to the oil tank (5) through the oil inlet pipe (11) and the oil return pipe (12); A plurality of cooling fans (13) are movably connected to corresponding heat sinks (14) and are used to supply air to the corresponding heat sinks (14) to dissipate heat from oil flowing through the oil channels of the heat sinks (14).

4. The cooling device for the oil-air-cooled transformer according to claim 3 is characterized in that: The heat dissipation device (1) further comprises: a bracket assembly (15), wherein a plurality of cooling fans (13) are movably connected to corresponding heat sinks (14) via the bracket assembly (15).

5. The cooling device for the oil-air-cooled transformer according to claim 4 is characterized in that: The support assembly (15) comprises: a support seat (151), a crossbeam (152), a support driver (153) and two guide rods (154); Two guide rods (154) are vertically arranged on the support seat (151), and the two guide rods (154) are respectively connected to a corresponding heat sink (14); The crossbeam (152) is slidably connected to the two guide rods (154), and a plurality of cooling fans (13) are arranged on the crossbeam (152); The support driver (153) is arranged on the support seat (151) and is used to drive the crossbeam (152) to move along the extension direction of the guide rod (154).

6. The cooling device for the oil-air-cooled transformer according to claim 5, characterized in that: The support assembly (15) further comprises: a storage frame (155), which is arranged on the crossbeam (152) and located between the cooling fan (13) and the heat sink (14), and is used for storing dry ice.

7. The cooling device for a forced oil-air-cooled transformer according to claim 5, characterized in that: A storage groove (156) for storing dry ice is provided on a surface of the support seat (151) facing the heat sink (14).

8. The cooling device for a forced oil-air-cooled transformer according to claim 2, characterized in that: The cooling device of the forced oil-air-cooled transformer further comprises: two control valves (4), one control valve (4) being provided on the oil inlet pipeline (11) and the other on the oil return pipeline (12), respectively, the control valves (4) being used to control the flow state of oil in the oil inlet pipeline (11) and the other on the oil return pipeline (12).

9. The cooling device for a forced oil-air-cooled transformer according to claim 2, characterized in that: The temperature measuring device (2) comprises: an optical fiber probe (21) arranged in the oil inlet pipeline (11) and used to detect the temperature of the oil entering the heat dissipation device (1).

10. The cooling device for a forced oil-air-cooled transformer according to claim 2, characterized in that: The oil drive assembly (3) comprises: a conventional submersible pump (31) and a stepless speed submersible pump (32); The conventional submersible pump (31) and the steplessly variable speed submersible pump (32) are both arranged on the oil return pipeline (12) and are connected to the cooling controller signal; The conventional submersible pump (31) is used to drive the oil to flow in the oil circulation loop in response to a start signal from the cooling controller; The steplessly variable speed submersible oil pump (32) is used to adjust the flow rate of oil flowing through the heat dissipation device (1) in response to a flow rate signal from a cooling controller.

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