Oil-immersed transformer with good heat dissipation performance

Abstract

This utility model discloses an oil-immersed transformer with good heat dissipation performance, relating to the field of transformer technology. It includes a housing with a cover plate and a sealing plate at each end. Two air guide fans are installed inside the sealing plate. Two screws are fixed to the upper end of a pressure plate. A first screw and a second screw are rotatably connected inside the housing and outside the two screws. A support shaft is rotatably connected to the upper end of the housing between the first and second screws. An eccentric rocker plate is fixed to the upper end of the support shaft, and a locking component is provided on the outer side of the eccentric rocker plate. This utility model provides an oil-immersed transformer with good heat dissipation performance. The air guide fans guide the cooling airflow continuously through the venting grooves and through the housing, achieving rapid heat dissipation of the heat-conducting fins and heat dissipation fins, thereby improving the heat dissipation effect. The locking component limits the position of the eccentric rocker plate, thereby locking the position of the pressure plate and preventing loosening of the clamping mechanism.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to an oil-immersed transformer with good heat dissipation performance. Background Technology

[0002] Oil-immersed transformers are widely used, especially in high-voltage fields, because they can accommodate all capacities and all voltages. However, because they are filled with a large amount of insulating oil and are completely sealed, the internal transformer device generates a lot of heat during use.

[0003] For example, Chinese utility model patent (CN205177541U) discloses an oil-immersed transformer, which describes: "It includes a shell and a transformer device, the transformer device is fixedly connected inside the shell, the shell is filled with insulating oil, the outer surface of the shell is provided with heat sinks, the shell is provided with an explosion-proof buffer cover, the transformer device is installed inside the explosion-proof buffer cover, and the explosion-proof buffer cover is provided with several oil pipes for the flow of insulating oil."

[0004] The aforementioned patent relies solely on a single heat sink to dissipate heat. While this improves the heat transfer speed, once the heat is transferred to the heat sink, it is difficult to quickly reduce the temperature of the heat sink itself, leading to heat accumulation and poor heat dissipation.

[0005] For example, Chinese utility model patent (CN219457292U) discloses an oil-immersed transformer, which describes: "It includes a shell, and a fixing block is fixedly connected to both the left and right end faces of the shell. A through groove is provided on the upper end face of the fixing block. A bidirectional threaded rod is rotatably connected to the inner cavity of the through groove through a bearing. A slider is threadedly connected to the outer side of the bidirectional threaded rod. A semi-circular clamping block is fixedly connected to the lower end face of the slider. Sliding grooves are provided at both the front and rear edges of the upper end face of the shell. A frame is slidably connected to the inner cavity of the sliding groove. A knob is fixedly connected to the front end face of the bidirectional threaded rod."

[0006] After installation, the aforementioned patent allows for quick disassembly and improved maintenance efficiency when regular maintenance is required. However, after the double-ended screw is rotated by holding the handle to clamp the transformer components and coils, there is a lack of a locking structure for the handle. This causes the double-ended screw to rotate easily without human intervention, resulting in a loosening of the clamping effect. Therefore, this application proposes an oil-immersed transformer with good heat dissipation performance. Utility Model Content

[0007] Based on this, it is necessary to provide an oil-immersed transformer with good heat dissipation performance to address the above-mentioned technical problems. Through the overall structural design, the heat is dissipated from the transformer by using heat-conducting plates and heat dissipation fins. With the help of the air guide fan, the heat dissipation airflow continuously passes through the ventilation slots and through the outer shell, achieving rapid heat dissipation of the heat-conducting plates and heat dissipation fins themselves, thereby improving the heat dissipation effect. After the pressure plate is clamped by holding the eccentric rocker and rotating the support shaft to control the downward movement of the pressure plate, the position of the eccentric rocker is limited by the locking component, thereby locking the position of the pressure plate and preventing the clamping from loosening.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] An oil-immersed transformer with good heat dissipation performance;

[0010] The device includes an outer casing, with a cover plate and a sealing plate at each end. Two air guide fans are installed inside the sealing plate. A support base is fixed to the lower inner end of the outer casing. Heat dissipation fin assemblies are fixed to both sides of the inner side of the outer casing. A pressure plate is provided on the inner side of the outer casing above the two heat dissipation fin assemblies. Two screws are fixed to the upper end of the pressure plate. A first screw cylinder and a second screw cylinder are rotatably connected to the inner side of the outer casing outside the two screws. The inner sides of the first screw cylinder and the second screw cylinder are threaded to the two screws. A support shaft is rotatably connected to the upper end of the outer casing between the first screw cylinder and the second screw cylinder. An eccentric rocker plate is fixed to the upper end of the support shaft. A locking assembly is provided on the outer side of the eccentric rocker plate.

[0011] In a preferred embodiment of the oil-immersed transformer with good heat dissipation provided by this utility model, a first chain group is driven between the support shaft and the first screw barrel, and a second chain group is driven between the support shaft and the second screw barrel.

[0012] As a preferred embodiment of the oil-immersed transformer with good heat dissipation performance provided by this utility model, the locking assembly includes a flat gear, a flat gear is fixed on the outer side of the eccentric rocker, a gear groove is opened at the upper end of the housing and on the outer side of the flat gear, a half gear is slidably connected to the inner side of the gear groove, the upper end of the half gear is meshed with the flat gear, a spring is fixed at the lower end of the half gear, the spring is located inside the gear groove, and the lower end of the spring is fixed to the housing.

[0013] As a preferred embodiment of the oil-immersed transformer with good heat dissipation performance provided by this utility model, the upper end of the cover plate is threaded with a hand-tightening bolt, the hand-tightening bolt is located at the upper end of the outer shell, one end of the hand-tightening bolt extends into the half gear and is movably connected to the half gear, the interior of the cover plate is provided with multiple ventilation slots at equal intervals, a heat-conducting plate is provided between every two ventilation slots, the multiple heat-conducting plates are located inside the cover plate and fixed to the cover plate, and a hinge is provided between the lower end of the cover plate and the outer shell.

[0014] As a preferred embodiment of the oil-immersed transformer with good heat dissipation performance provided by this utility model, an assembly base plate is fixed at the bottom of the outer shell, and guide posts are fixed at the four corners of the upper end of the bearing base. The upper ends of the four guide posts pass through the heat dissipation fin assembly and are fixed to the outer shell. The pressure plate is slidably connected to the four guide posts.

[0015] As a preferred embodiment of the oil-immersed transformer with good heat dissipation performance provided by this utility model, the support shaft is coaxially arranged with the eccentric rocker plate, and multiple coil receiving slots are equidistantly opened inside the pressure plate. A rubber insulating strip is fixed at the bottom of the pressure plate between every two coil receiving slots.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The oil-immersed transformer with good heat dissipation performance provided by this utility model, through the overall structural design, enables the heat to be discharged from the transformer by means of heat-conducting plates and heat dissipation fins. With the help of the air guide fan, the heat dissipation airflow continuously passes through the ventilation slots and penetrates the outer shell, so as to achieve rapid heat dissipation of the heat-conducting plates and heat dissipation fins themselves, thereby improving the heat dissipation effect.

[0018] By gripping the eccentric rocker's rotating support shaft to control the downward movement of the pressure plate to clamp the transformer components such as coils, the locking assembly is used to limit the position of the eccentric rocker, thereby locking the position of the pressure plate and preventing the clamping from loosening. Attached Figure Description

[0019] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the oil-immersed transformer with good heat dissipation provided by this utility model;

[0021] Figure 2Rear view of the overall structure of the oil-immersed transformer with good heat dissipation provided by this utility model;

[0022] Figure 3 A schematic diagram of the structure of the oil-immersed transformer cover with good heat dissipation provided by this utility model after opening;

[0023] Figure 4 A schematic diagram of the inner side of the housing of an oil-immersed transformer with good heat dissipation performance provided by this utility model;

[0024] Figure 5 A schematic diagram of the upper part of the casing of an oil-immersed transformer with good heat dissipation performance provided by this utility model;

[0025] Figure 6 A schematic diagram of the structure between the first and second screw barrels of the oil-immersed transformer with good heat dissipation performance provided by this utility model.

[0026] The markings in the diagram are explained as follows:

[0027] 1. Outer shell; 2. Assembly base plate; 3. Cover plate; 4. Sealing plate; 5. Ventilation slot; 6. Heat-conducting plate; 7. Hinge; 8. Air duct fan; 9. Support base; 10. Heat dissipation fin assembly; 11. Guide post; 12. Pressure plate; 13. Rubber insulating strip; 14. Coil receiving slot; 15. Screw; 16. First screw barrel; 17. Second screw barrel; 18. Support shaft; 19. First chain assembly; 20. Second chain assembly; 21. Eccentric rocker; 22. Flat gear; 23. Gear groove; 24. Half gear; 25. Spring; 26. Hand-tightening bolt. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] Example 1:

[0031] Please refer to Figure 1-6An oil-immersed transformer with good heat dissipation performance includes a housing 1, an assembly base plate 2 fixed at the bottom of the housing 1, a cover plate 3 and a sealing plate 4 respectively provided at both ends of the housing 1, a bearing base 9 fixed at the lower end of the inner side of the housing 1, and heat dissipation fin groups 10 fixed on both sides of the inner side of the housing 1. After the transformer is placed on the upper end of the bearing base 9, the heat dissipation fin groups 10 are used to dissipate the heat of the transformer during operation. In order to quickly reduce the temperature of the heat dissipation fin groups 10 and thus improve the heat dissipation effect, two air guide fans 8 are installed inside the sealing plate 4. Multiple ventilation slots 5 are equally spaced inside the cover plate 3. A heat-conducting plate 6 is provided between every two ventilation slots 5. The multiple heat-conducting plates 6 are located inside the cover plate 3 and fixed to the cover plate 3. When the cover plate 3 is closed, the multiple heat-conducting plates 6 are in contact with the transformer. A hinge 7 is provided between the lower end of the cover plate 3 and the housing 1.

[0032] By utilizing the contact between the heat-conducting plate 6, the heat dissipation fin assembly 10 and the transformer, the heat of the transformer is dissipated. In conjunction with the air guide fan 8, the heat dissipation airflow is continuously guided through the ventilation slot 5 and through the outer shell 1 to achieve rapid heat dissipation of the heat-conducting plate 6 and the heat dissipation fin assembly 10 themselves, thereby improving the heat dissipation effect.

[0033] In order to install and fix the transformer, a pressure plate 12 is provided on the inner side of the outer casing 1 and above the two heat dissipation fin groups 10. Two screws 15 are fixed on the upper end of the pressure plate 12. A first screw barrel 16 and a second screw barrel 17 are rotatably connected to the inner side of the outer casing 1 and outside the two screws 15, respectively. The inner sides of the first screw barrel 16 and the second screw barrel 17 are threaded to the two screws 15, respectively. A support shaft 18 is rotatably connected to the upper end of the outer casing 1 and between the first screw barrel 16 and the second screw barrel 17. A first chain group 19 is driven between the support shaft 18 and the first screw barrel 16. A second chain group 20 is driven between the support shaft 18 and the second screw barrel 17. An eccentric rocker plate 21 is fixed on the upper end of the support shaft 18. The support shaft 18 and the eccentric rocker plate 21 are coaxially arranged.

[0034] By gripping the eccentric rocker plate 21 and rotating the support shaft 18, in conjunction with the transmission of the first chain group 19 and the second chain group 20, the first screw barrel 16 and the second screw barrel 17 are driven to rotate synchronously in the same direction. Then, by using the threaded connection between the first screw barrel 16 and the second screw barrel 17 and the two screws 15 respectively, the pressure plate 12 is driven to move downward to clamp and fix the transformer components such as coils. At this time, in order to lock the position of the pressure plate 12, a locking component is provided on the outside of the eccentric rocker plate 21.

[0035] Specifically, the locking assembly includes a spur gear 22, a spur gear 22 is fixed to the outside of the eccentric rocker plate 21, a gear groove 23 is provided at the upper end of the housing 1 and outside the spur gear 22, a half gear 24 is slidably connected to the inside of the gear groove 23, the upper end of the half gear 24 is meshed with the spur gear 22, and a spring 25 is fixed to the lower end of the half gear 24. The spring 25 is located inside the gear groove 23 and the lower end of the spring 25 is fixed to the housing 1.

[0036] All of the above electrical components are electrically connected to the main controller and the power supply. The main controller can be a conventional known device that performs control, and the existing publicly available power connection technology will not be described in detail here. The mechanical transmission components provided in this utility model are all closed designs that can be opened for maintenance. According to the mechanical manual, as long as they are properly maintained, these mechanical transmission components can normally realize the transmission movement claimed above.

[0037] Example 2:

[0038] The oil-immersed transformer with good heat dissipation performance provided in Example 1 is further optimized, specifically, as follows: Figure 1-6 As shown, when the cover plate 3 is closed by flipping it with the hinge 7, in order to limit and fix the position of the cover plate 3, a hand-tightening bolt 26 is threadedly connected to the upper end of the cover plate 3. The hand-tightening bolt 26 is located at the upper end of the outer shell 1, and one end of the hand-tightening bolt 26 extends into the half gear 24 and is movably connected to the half gear 24.

[0039] To further improve the stability of the pressure plate 12 during lifting and lowering, guide posts 11 are fixed at the four corners of the upper end of the bearing base 9. The upper ends of the four guide posts 11 all pass through the heat dissipation fin assembly 10 and are fixed to the outer shell 1. The pressure plate 12 is slidably connected to the four guide posts 11.

[0040] When using the pressure plate 12 to clamp and fix transformer components such as coils, in order to avoid the pressure plate 12 blocking the coils, multiple coil receiving slots 14 are provided equidistantly inside the pressure plate 12. In order to increase friction and improve the clamping effect, a rubber insulating strip 13 is fixed at the bottom of the pressure plate 12 and between every two coil receiving slots 14.

[0041] The process of using the oil-immersed transformer with good heat dissipation provided by this utility model is as follows: When the transformer needs to be maintained, the hand-tightening bolt 26 is rotated by the threaded connection between the hand-tightening bolt 26 and the cover plate 3, so that the hand-tightening bolt 26 slides out from the half gear 24, and then the cover plate 3 is opened by flipping the hinge 7.

[0042] Simultaneously, pressing the half gear 24 causes it to press down the spring 25, thereby disengaging the half gear 24 from the flat gear 22, making it easier to grip the eccentric rocker 21 and rotate the support shaft 18. Utilizing the transmission connection of the first chain group 19 and the second chain group 20, the first screw barrel 16 and the second screw barrel 17 are driven to rotate synchronously. In conjunction with the threaded connection between the first screw barrel 16, the second screw barrel 17 and the two screws 15, the pressure plate 12 is driven to move upward through the guide post 11 to release the clamping on the transformer, enabling quick disassembly of the transformer for maintenance.

[0043] When the pressure plate 12 has moved up and down and needs to be fixed in position, and the teeth of the half gear 24 and the flat gear 22 are aligned, the half gear 24 is released and the elasticity of the spring 25 is used to push the half gear 24 back to its original position, so that the half gear 24 re-meshes with the flat gear 22, thereby limiting the rotation of the eccentric rocker 21 and locking the position of the pressure plate 12. After the cover plate 3 is closed, the hand-tightening bolt 26 is rotated to insert it into the half gear 24, which not only locks the cover plate 3, but also further limits the half gear 24, thereby further improving the stability of the locking effect on the pressure plate 12.

Claims

1. An oil-immersed transformer with good heat dissipation performance, characterized in that, Includes an outer shell (1), with a cover plate (3) and a sealing plate (4) respectively provided at both ends of the outer shell (1). Two air guide fans (8) are installed inside the sealing plate (4). A bearing base (9) is fixed to the lower end of the inner side of the outer shell (1). Heat dissipation fin groups (10) are fixed to both sides of the inner side of the outer shell (1). A pressure plate (12) is provided on the inner side of the outer shell (1) above the two heat dissipation fin groups (10). Two screws (15) are fixed to the upper end of the pressure plate (12). Inside the housing (1) and on the outside of the two screws (15), a first screw barrel (16) and a second screw barrel (17) are rotatably connected respectively. The inner sides of the first screw barrel (16) and the second screw barrel (17) are threadedly connected to the two screws (15). A support shaft (18) is rotatably connected to the upper end of the housing (1) and between the first screw barrel (16) and the second screw barrel (17). An eccentric rocker plate (21) is fixed to the upper end of the support shaft (18). A locking component is provided on the outer side of the eccentric rocker plate (21).

2. The oil-immersed transformer with good heat dissipation performance according to claim 1, characterized in that, A first chain group (19) is driven between the support shaft (18) and the first screw barrel (16), and a second chain group (20) is driven between the support shaft (18) and the second screw barrel (17).

3. The oil-immersed transformer with good heat dissipation performance according to claim 1, characterized in that, The locking assembly includes a spur gear (22), and the spur gear (22) is fixed on the outer side of the eccentric rocker (21). A gear groove (23) is provided on the upper end of the housing (1) and on the outer side of the spur gear (22). A half gear (24) is slidably connected to the inner side of the gear groove (23). The upper end of the half gear (24) is meshed with the spur gear (22). A spring (25) is fixed to the lower end of the half gear (24). The spring (25) is located inside the gear groove (23). The lower end of the spring (25) is fixed to the housing (1).

4. The oil-immersed transformer with good heat dissipation performance according to claim 3, characterized in that, The upper end of the cover plate (3) is threaded with a hand-tightening bolt (26), which is located at the upper end of the outer shell (1). One end of the hand-tightening bolt (26) extends into the half gear (24) and is movably connected to the half gear (24). The cover plate (3) has multiple equidistant ventilation slots (5) inside. A heat-conducting plate (6) is provided between every two ventilation slots (5). The multiple heat-conducting plates (6) are located inside the cover plate (3) and fixed to the cover plate (3). A hinge (7) is provided between the lower end of the cover plate (3) and the outer shell (1).

5. The oil-immersed transformer with good heat dissipation performance according to claim 1, characterized in that, The bottom end of the outer shell (1) is fixed with an assembly base plate (2), and the four corners of the upper end of the bearing base (9) are all fixed with guide posts (11). The upper ends of the four guide posts (11) all pass through the heat dissipation fin assembly (10) and are fixed to the outer shell (1). The pressure plate (12) is slidably connected to the four guide posts (11).

6. The oil-immersed transformer with good heat dissipation performance according to claim 1, characterized in that, The support shaft (18) is coaxially arranged with the eccentric rocker plate (21). Multiple coil receiving slots (14) are equidistantly opened inside the pressure plate (12). A rubber insulating strip (13) is fixed at the bottom of the pressure plate (12) between every two coil receiving slots (14).

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