Sealing structure of oil immersed transformer

Abstract

The utility model discloses an oil immersed transformer sealing structure, which belongs to the technical field of transformer sealing structures, and comprises an oil immersed transformer main body, an oil storage tank is arranged above the oil immersed transformer main body, and the bottom surface of the oil storage tank and the upper surface of the oil immersed transformer main body are jointly and fixedly communicated with two oil guide pipes; the upper surface of the oil storage tank fixedly communicates with a breather valve, the inner wall of the oil storage tank is in threaded connection with a sealing plug, and a bearing shell is arranged on the outer side of the oil storage tank. According to the oil immersed transformer sealing structure, through mutual cooperation of the oil immersed transformer body, the oil storage tank, the oil guide pipe, the breather valve, the sealing plug, the bearing shell, a mounting bolt, a key controller, a semiconductor chilling plate, cooling fins, a cooling fan, an air hole and a temperature sensor, the oil guide pipe can communicate with the oil immersed transformer body and the oil guide pipe; and when the cooling oil in the oil-immersed transformer main body expands due to heating, the cooling oil can enter the oil storage tank through the oil guide pipe to temporarily release the pressure of the oil-immersed transformer main body.

Description

Technical Field

[0001] This application belongs to the technical field of transformer sealing structure, and particularly relates to a sealing structure for an oil-immersed transformer. Background Technology

[0002] The transformer sealing structure is a protective structure used in transformers. Its main purpose is to prevent the medium inside the transformer (such as the insulating oil in an oil-immersed transformer) from leaking into the external environment, while also preventing external air, moisture, dust and other impurities from entering the transformer. It is a key part to ensure the normal operation and service life of the transformer.

[0003] The existing utility model with authorization announcement number CN214848101U discloses a sealing structure for an oil-immersed transformer tank. Through the set observation mechanism, users can monitor the condition inside the oil tank in real time. At the same time, in some special cases, the observation window on the oil tank can be closed to prevent ultraviolet rays from coming into contact with the oil inside the tank through the observation window. Users can adjust whether the observation window is open or closed according to their needs. Through the set connection mechanism, the connection tightness of the pressure relief component can be improved, while reducing the difficulty of operation and greatly improving the user's experience when operating the pressure relief component. It is easier to learn and operate.

[0004] While the above technical solution makes it convenient for staff to observe the oil level in the tank and the pressure relief components are easy to operate, the pressure release still requires manual operation. It lacks an intelligent pressure relief structure that can reduce manual operation to release the high-temperature gas pressure inside the transformer, resulting in the need for manual intervention to release the high-temperature pressure of the transformer, which leads to high manual maintenance costs.

[0005] Therefore, we propose a sealing structure for oil-immersed transformers to solve the above problems. Utility Model Content

[0006] The purpose of this application is to solve the problem that the high temperature pressure release of transformers in the prior art requires manual intervention, which leads to high manual maintenance costs, and to propose a sealing structure for oil-immersed transformers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An oil-immersed transformer sealing structure includes an oil-immersed transformer body, an oil tank disposed above the oil-immersed transformer body, two oil guide pipes fixedly connected to the bottom surface of the oil tank and the upper surface of the oil-immersed transformer body, a breather valve fixedly connected to the upper surface of the oil tank, a sealing plug threadedly connected to the inner wall of the oil tank, a bearing shell disposed on the outer side of the oil tank, a button controller fixedly connected to the front of the oil tank, four mounting bolts threadedly connected to the inner wall of the bearing shell and the inner wall of the oil tank, a semiconductor cooling chip, a cooling fan and two temperature sensors fixedly connected to the inner wall of the bearing shell respectively, a plurality of identical vent holes opened on the outer surface of the bearing shell, and heat dissipation fins fixedly connected to the front of the semiconductor cooling chip.

[0009] Preferably, the back of the thermoelectric cooler and the back of the two temperature sensors are in contact with the front of the oil tank. The thermoelectric cooler, the cooling fan and the two temperature sensors are electrically connected to the button controller via wires. Two mounting plates are fixedly connected to the bottom surface of the oil-immersed transformer body, and each mounting plate has several identical mounting holes on its upper surface.

[0010] Preferably, two steel plates are fixedly connected to the upper surface of the oil-immersed transformer body, and each steel plate has a lifting hole on its outer surface.

[0011] Preferably, a rain shield is provided on the outside of the oil tank, and the inner wall of the rain shield and the inner wall of the oil tank are connected by four fastening bolts.

[0012] Preferably, a first washer is fitted on the outer surface of each of the fastening bolts, and the back of each first washer is in contact with the outer surface of the rain shield.

[0013] Preferably, a second washer is fitted on the outer surface of each mounting bolt, and the back of each second washer is in contact with the outer surface of the bearing shell.

[0014] In summary, the technical effects and advantages of this application are as follows:

[0015] Through the coordinated operation of the oil-immersed transformer body, oil tank, oil guide pipe, breather valve, sealing plug, bearing shell, mounting bolts, key controller, thermoelectric cooler, heat dissipation fins, cooling fan, vent holes, and temperature sensor, the oil guide pipe connects the oil-immersed transformer body and the oil tank. When the cooling oil in the oil-immersed transformer body expands due to heat, it can flow through the oil guide pipe into the oil tank to temporarily relieve pressure in the transformer body. The temperature sensor monitors the oil temperature in the oil tank. When the oil temperature in the oil tank exceeds the preset temperature range of the key controller, the key controller can energize the thermoelectric cooler and activate back-side cooling. With the cooperation of heat dissipation fins and vents, the button controller can control the cooling fan to rotate and dissipate heat from the front heating surface of the semiconductor cooling chip. This allows for the rapid release and transfer of high-temperature oil in the oil tank, preventing high pressure from forming due to high temperature. If the pressure in the oil tank becomes too high in a short period of time, it can also be automatically released through the breather valve. This helps to automatically release high-temperature pressure from the main body of the oil-immersed transformer, avoiding the problem of high maintenance costs caused by the lack of an intelligent pressure relief structure that reduces manual operation in releasing high-temperature gas pressure inside the transformer. Attached Figure Description

[0016] Figure 1 This is a three-dimensional overall structural diagram of the sealing structure of the oil-immersed transformer of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the main body of the oil-immersed transformer of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the oil storage tank of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the oil storage tank of this utility model, viewed from below.

[0020] Figure 5 This is a side-view sectional three-dimensional structural diagram of the bearing shell of this utility model.

[0021] In the diagram: 1. Main body of oil-immersed transformer; 2. Oil tank; 3. Oil guide pipe; 4. Breather valve; 5. Sealing plug; 6. Bearing shell; 7. Mounting bolts; 8. Button controller; 9. Semiconductor cooling chip; 10. Heat sink fins; 11. Cooling fan; 12. Vent hole; 13. Temperature sensor; 14. Mounting plate; 15. Mounting hole; 16. Steel plate; 17. Lifting hole; 18. Rain shield; 19. Fastening bolts; 20. First washer; 21. Second washer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-5 An oil-immersed transformer sealing structure includes an oil-immersed transformer body 1, an oil storage tank 2 disposed above the oil-immersed transformer body 1, two oil guide pipes 3 fixedly connected to the bottom surface of the oil storage tank 2 and the upper surface of the oil-immersed transformer body 1, and two mounting plates 14 fixedly connected to the bottom surface of the oil-immersed transformer body 1. Each mounting plate 14 has several identical mounting holes 15 on its upper surface. By setting the mounting holes 15, the mounting plate 14 can be fixed in conjunction with an external rod-shaped positioning structure, thereby fixing the entire transformer structure.

[0024] A breather valve 4 is fixedly connected to the upper surface of the oil tank 2. When the internal pressure is too high or too low, the breather valve 4 can connect the inside and outside of the oil tank 2, thereby quickly releasing and reducing the pressure of the oil tank 2 in a short period of time. A sealing plug 5 is threadedly connected to the inner wall of the oil tank 2. The sealing plug 5 can seal and block the oil port at the top of the oil tank 2. When the sealing plug 5 is removed, it is convenient to replace the cooling oil in the oil-immersed transformer body 1 and the oil tank 2. Two steel plates 16 are fixedly connected to the upper surface of the oil-immersed transformer body 1. Each steel plate 16 has a lifting hole 17 on its outer surface. By setting the lifting hole 17, the steel plate 16 can be lifted and moved with the external lifting structure, thereby facilitating the transportation of the entire transformer.

[0025] An outer support shell 6 is provided on the outside of the oil tank 2. A button controller 8 is fixedly connected to the front of the oil tank 2. A rain shield 18 is provided on the outside of the oil tank 2. The inner wall of the rain shield 18 and the inner wall of the oil tank 2 are connected by four fastening bolts 19. By setting the fastening bolts 19, the rain shield 18 can be fixedly installed on the front of the oil tank 2, so that the rain shield 18 can protect the electrical components below from rain, thereby increasing the safety of the electrical components below.

[0026] The inner wall of the bearing shell 6 and the inner wall of the oil tank 2 are connected by four mounting bolts 7 via a common thread. A thermoelectric cooler 9, a cooling fan 11, and two temperature sensors 13 are fixedly connected to the inner wall of the bearing shell 6. The back of the thermoelectric cooler 9 and the back of the two temperature sensors 13 are in contact with the front of the oil tank 2. The thermoelectric cooler 9, the cooling fan 11, and the two temperature sensors 13 are all electrically connected to the button controller 8 via wires. A first washer 20 is fitted onto the outer surface of each fastening bolt 19, and the back of each first washer 20 is in contact with the outer surface of the rain shield 18. By setting the first washer 20, it can be placed between the rain shield 18 and the fastening bolt 19, increasing the contact area between them and thus increasing the fastening effect of the fastening bolt 19.

[0027] The outer surface of the carrier shell 6 has several identical vent holes 12. The front of the semiconductor cooling chip 9 is fixedly connected to a heat dissipation fin 10. The outer surface of each mounting bolt 7 is fitted with a second washer 21. The back of each second washer 21 is in contact with the outer surface of the carrier shell 6. By setting the second washer 21, the contact area between the carrier shell 6 and the mounting bolt 7 can be increased, thereby increasing the fastening effect of the mounting bolt 7.

[0028] The working principle of this utility model is as follows: During use, when the cooling oil in the main body 1 of the oil-immersed transformer expands due to heat, the high-temperature cooling oil enters the oil storage tank 2 through the oil guide pipe 3 to temporarily relieve the pressure of the main body 1 of the oil-immersed transformer. When the temperature sensor 13 detects that the oil temperature in the oil storage tank 2 is higher than the preset temperature range of the button controller 8, the button controller 8 controls the semiconductor cooling chip 9 to be energized and the back side to be cooled. At the same time, with the cooperation of the heat dissipation fins 10 and the vent 12, the button controller 8 controls the cooling fan 11 to be energized and rotated to dissipate heat from the front heating surface of the semiconductor cooling chip 9, thereby quickly releasing and transferring the high temperature of the oil in the oil storage tank 2, thus preventing the generation of high pressure in the oil storage tank 2 due to high temperature. When the pressure in the oil storage tank 2 increases too much in a short period of time, the breather valve 4 connects the inside and outside of the oil storage tank 2 and automatically releases the high temperature oil gas, which can automatically release the high temperature pressure of the main body 1 of the oil-immersed transformer. The design of the entire sealing structure of the oil-immersed transformer effectively solves the problem that the lack of an intelligent pressure relief structure that can reduce manual operation to release the high temperature gas pressure in the transformer leads to the need for manual intervention to release the high temperature pressure of the transformer, resulting in high manual maintenance costs.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for an oil-immersed transformer, comprising an oil-immersed transformer body (1), characterized in that: An oil storage tank (2) is provided above the main body (1) of the oil-immersed transformer. The bottom surface of the oil storage tank (2) and the upper surface of the main body (1) of the oil-immersed transformer are connected by two oil guide pipes (3). A breather valve (4) is fixedly connected to the upper surface of the oil storage tank (2). A sealing plug (5) is threadedly connected to the inner wall of the oil storage tank (2). A bearing shell (6) is provided on the outer side of the oil storage tank (2). A button controller (8) is fixedly connected to the front of the oil storage tank (2). Four mounting bolts (7) are threadedly connected to the inner wall of the bearing shell (6) and the inner wall of the oil storage tank (2). A semiconductor cooling chip (9), a cooling fan (11) and two temperature sensors (13) are fixedly connected to the inner wall of the bearing shell (6). Several identical vent holes (12) are opened on the outer surface of the bearing shell (6). A heat dissipation fin (10) is fixedly connected to the front of the semiconductor cooling chip (9).

2. The sealing structure of an oil-immersed transformer according to claim 1, characterized in that: The back of the semiconductor cooling chip (9) and the back of the two temperature sensors (13) are in contact with the front of the oil tank (2). The semiconductor cooling chip (9), the cooling fan (11) and the two temperature sensors (13) are electrically connected to the button controller (8) through wires. The bottom surface of the oil-immersed transformer body (1) is fixedly connected to two mounting plates (14). Each mounting plate (14) has several identical mounting holes (15) on its upper surface.

3. The sealing structure of an oil-immersed transformer according to claim 1, characterized in that: Two steel plates (16) are fixedly connected to the upper surface of the oil-immersed transformer body (1), and each steel plate (16) has a lifting hole (17) on its outer surface.

4. The sealing structure of an oil-immersed transformer according to claim 1, characterized in that: The outer side of the oil tank (2) is provided with a rain shield (18), and the inner wall of the rain shield (18) and the inner wall of the oil tank (2) are connected by four fastening bolts (19).

5. The sealing structure of an oil-immersed transformer according to claim 4, characterized in that: Each of the fastening bolts (19) has a first washer (20) fitted on its outer surface, and the back of each first washer (20) is in contact with the outer surface of the rain shield (18).

6. The sealing structure of an oil-immersed transformer according to claim 1, characterized in that: Each mounting bolt (7) has a second washer (21) fitted on its outer surface, and the back of each second washer (21) is in contact with the outer surface of the bearing shell (6).

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