Power transformer cooling device

Abstract

The oil tank is connected with a radiator constituting a transformer hot oil circulation system, a cooling mechanism arranged at the bottom of the radiator for delivering cooling medium to the radiator, and an adjusting plate assembly arranged parallel to the flow direction of the cooling medium and comprising two partition plates rotatably arranged at the front and rear side faces of the radiator, wherein each partition plate can be rotated to be arranged parallel to the side face when the cooling mechanism is opened and to be arranged non-parallel to the side face when the cooling mechanism is closed, and the top of the oil tank is further provided with a high-pressure sleeve and a low-pressure sleeve, and the partition plates are stainless steel plates. The adjusting plate assembly can be adjusted accordingly when the cooling mechanism is opened and closed, and the heat dissipation effect of the transformer under the two cooling modes of self-cooling and air cooling can be improved.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more specifically to a cooling device for power transformers. Background Technology

[0002] During operation, power transformers experience no-load and stray losses in their core, coils, and structural components. This energy is converted into heat and transferred to the insulating oil, causing its temperature to rise. Excessively high operating temperatures lead to aging of the transformer's solid insulation materials, thus affecting the transformer's theoretical service life. Therefore, maintaining a certain oil temperature is crucial for ensuring the normal operation of the power transformer. Common heat dissipation methods for power transformers include: self-cooling, air cooling, forced air cooling, and forced oil-guided air cooling. Depending on the transformer type, capacity, losses, and user requirements, different heat dissipation methods are selected for circulating cooling of the insulating oil, ensuring the power transformer operates within its normal temperature range. Summary of the Invention

[0003] This invention provides a power transformer suitable for self-cooling / air-cooling cooling methods. The cooling device of this invention can effectively improve the heat dissipation effect of the power transformer under self-cooling / air-cooling methods.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A power transformer cooling device includes a transformer oil tank and a radiator connected to the transformer oil tank and forming a transformer hot oil circulation system.

[0006] A cooling mechanism, disposed at the bottom of the radiator, is used to supply a cooling medium to the radiator; and

[0007] An adjusting plate assembly is arranged parallel to the flow direction of the cooling medium, and the adjusting plate assembly includes two partitions rotatably disposed on the front and rear sides of the radiator.

[0008] Each of the partitions is capable of rotating to be parallel to the side when the cooling mechanism is turned on, and rotating to be non-parallel to the side when the cooling mechanism is turned off.

[0009] Preferably, the top of the transformer tank is also provided with a high-voltage bushing and a low-voltage bushing.

[0010] Preferably, the partition is made of stainless steel plate.

[0011] Preferably, the upper interface of the radiator is connected to the upper end of the transformer tank through an oil guide pipe, and the lower interface of the radiator is connected to the lower end of the transformer tank through an oil guide pipe.

[0012] Preferably, the first oil guide pipe and the second oil guide pipe are supported and fixed by an oil guide frame.

[0013] Preferably, the cooling mechanism includes a plurality of fans evenly distributed at the bottom of the radiator, and the air outlet direction of the fans is parallel to the vertical direction of the radiator.

[0014] Preferably, the baffle is rotatably connected to the oil guide frame via a rotating shaft, and the adjusting plate assembly further includes a motor for driving the baffle to rotate.

[0015] Preferably, it also includes an air-cooled control cabinet, which is electrically connected to the cooling mechanism and the regulating plate assembly.

[0016] As can be seen from the above technical solution, the present invention has the following beneficial effects: In the present invention, an adjusting plate assembly is installed on the front and rear sides of the radiator. The partition in the adjusting plate assembly can rotate according to the start signal of the cooling mechanism. That is, when the cooling mechanism is started, the partition automatically rotates to a position parallel to the side of the radiator on that side to block the gaps on both sides of the radiator, ensuring that when the fan is started, the loss of fan airflow through both sides of the radiator is reduced, thereby improving the heat dissipation effect of the radiator; and when the cooling mechanism is closed, the partition automatically rotates to a position that is not parallel to the side of the radiator on that side, so that it no longer blocks the gaps at both ends of the radiator, ensuring that when the fan stops working and the transformer is in a self-cooling state, the heat dissipation of the radiator to the air at both ends is enhanced, thereby improving the heat dissipation effect of the radiator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cooling mechanism of the present invention when it is not in operation;

[0018] Figure 2 for Figure 1 Side view;

[0019] Figure 3 This is a schematic diagram of the cooling mechanism of the present invention when it is turned on;

[0020] Figure 4 for Figure 3 Side view.

[0021] In the diagram: 10, transformer oil tank; 20, radiator; 210, oil guide pipe one; 220, oil guide pipe two; 230, oil guide frame; 30, cooling mechanism; 310, fan; 40, regulating plate assembly; 410, partition plate; 420, motor; 50, high-voltage bushing; 60, low-voltage bushing; 70, air-cooled control cabinet. Detailed Implementation

[0022] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] Example:

[0024] A power transformer cooling device includes a transformer oil tank 10 and a radiator 20 connected to the transformer oil tank and forming a transformer hot oil circulation system.

[0025] Cooling mechanism 30, located at the bottom of the radiator, is used to supply cooling medium to the radiator; and

[0026] The regulating plate assembly 40 is arranged parallel to the flow direction of the cooling medium. The regulating plate assembly includes two partitions 410 rotatably disposed on the front and rear sides of the radiator. In use, each partition can rotate to be parallel to the side when the cooling mechanism is turned on, so as to block the gaps on both sides of the radiator and ensure that the cooling mechanism reduces the airflow loss to the outside through the sides of the radiator when it is started, thereby improving the heat dissipation effect of the radiator. When the cooling mechanism is turned off, it rotates to be non-parallel to the side, so as not to block the gaps on both sides of the radiator. This ensures that when the cooling mechanism stops working and the transformer is in a self-cooling state, the heat dissipation of the radiator to the air at both ends is enhanced, thereby improving the heat dissipation effect of the radiator.

[0027] As a preferred technical solution of the present invention, the top of the transformer tank 10 is also provided with a high-voltage bushing 50 and a low-voltage bushing 60 respectively.

[0028] Furthermore, the partition 410 is made of stainless steel plate, which gives the partition anti-corrosion and anti-rust functions.

[0029] As a preferred technical solution of the present invention, the upper interface of the radiator 20 is connected to the upper end of the transformer oil tank through an oil guide pipe 210, and the lower interface of the radiator is connected to the lower end of the transformer oil tank through an oil guide pipe 220, thereby forming the entire system of transformer hot oil circulation.

[0030] Furthermore, the first oil guide pipe 210 and the second oil guide pipe 220 are supported and fixed by the oil guide frame 230 to improve the stability of the first oil guide pipe and the second oil guide pipe.

[0031] As a preferred technical solution of the present invention, the cooling mechanism 30 includes a plurality of fans 310 evenly distributed at the bottom of the radiator, and the air outlet direction of the fans is parallel to the vertical direction of the radiator. When the transformer load reaches the threshold, the fans are turned on to dissipate heat from the transformer.

[0032] Reference Figure 3 , Figure 4As a preferred technical solution of the present invention, the partition 410 is rotatably connected to the oil guide frame via a rotating shaft. Specifically, the partition is set on a vertical support. The adjusting plate assembly 40 also includes a motor 420 for driving the partition to rotate. When the fan starts, the motor will start and the partition will automatically rotate to a direction parallel to the side of the radiator on that side, so as to block the gap of the radiator on that side and ensure that when the fan starts, the loss of the fan airflow flowing into the air through both ends of the radiator is reduced, so as to improve the heat dissipation effect of the radiator.

[0033] Reference Figure 1 , Figure 2 When the fan 310 stops working, the motor 420 immediately starts to operate, and the partition 410 automatically rotates to a state that is not parallel to the side of the radiator. Preferably, it can rotate to a state that is perpendicular to the side of the radiator, so that it no longer blocks the gaps at both ends of the radiator. This ensures that when the fan stops working and the transformer is in a self-cooling state, the amount of heat dissipation from both ends of the radiator to the air is increased, thereby improving the heat dissipation effect of the radiator.

[0034] As a preferred technical solution of the present invention, it also includes an air-cooled control cabinet 70, which is electrically connected to the cooling mechanism and the regulating plate assembly. The air-cooled control cabinet is located near the transformer body and can be connected to the transformer body and components via cables to control the fan and motor.

[0035] In summary, when the power transformer operates in air-cooled mode, the baffles 410 on both sides of the radiator 20 reduce airflow leakage from the fan 310 into the gaps at both ends of the radiator, promoting a greater temperature difference between the air inside and outside the radiator. This increases the buoyancy of the air inside the radiator, increases the airflow speed, and thus improves the heat exchange efficiency of the radiator. Conversely, when the power transformer operates in self-cooled mode, the airflow speed of the radiator decreases, resulting in poor heat exchange efficiency. In this case, the baffles can be opened to increase the area of ​​heat exchange between the radiator and the air, thereby improving the overall heat exchange efficiency of the radiator.

[0036] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A power transformer cooling device, comprising a transformer oil tank (10) and a radiator (20) connected to the transformer oil tank and constituting a transformer hot oil circulation system, characterized in that, Cooling mechanism (30), wherein the cooling mechanism is disposed at the bottom of the radiator for supplying cooling medium to the radiator; and Adjustment plate assembly (40), the adjustment plate assembly is arranged parallel to the flow direction of the cooling medium, and the adjustment plate assembly includes two partitions (410) rotatably arranged on the front and rear sides of the radiator; Each of the partitions can be rotated to be parallel to the side when the cooling mechanism is turned on, so as to block the gaps on both sides of the radiator and reduce airflow loss, and rotated to be non-parallel to the side when the cooling mechanism is turned off, so as to increase the contact area between the radiator and the air and enhance the self-cooling heat dissipation effect. The baffle (410) is rotatably connected to the oil guide frame via a rotating shaft, and the adjusting plate assembly (40) also includes a motor (420) for driving the baffle to rotate.

2. The power transformer cooling device according to claim 1, characterized in that, The transformer tank (10) is also equipped with a high-voltage bushing (50) and a low-voltage bushing (60) on the top.

3. The power transformer cooling device according to claim 1, characterized in that, The partition (410) is made of stainless steel plate.

4. The power transformer cooling device according to claim 1, characterized in that, The upper interface of the radiator (20) is connected to the upper end of the transformer tank through an oil guide pipe (210), and the lower interface of the radiator is connected to the lower end of the transformer tank through an oil guide pipe (220).

5. The power transformer cooling device according to claim 4, characterized in that, The first oil guide pipe (210) and the second oil guide pipe (220) are supported and fixed by the oil guide frame (230).

6. The power transformer cooling device according to claim 5, characterized in that, The cooling mechanism (30) includes multiple fans (310) evenly distributed at the bottom of the radiator, and the air outlet direction of the fans is parallel to the vertical direction of the radiator.

7. The power transformer cooling device according to any one of claims 1-6, characterized in that, It also includes an air-cooled control cabinet (70), which is electrically connected to the cooling mechanism and the regulating plate assembly.

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