Sealing anti-leakage structure for oil tank of oil-immersed transformer

Abstract

The oil-immersed transformer oil tank sealing anti-seepage structure comprises a transformer oil tank, a fixing assembly and an end cover are arranged at the upper end of the transformer oil tank, the transformer oil tank is connected with the end cover through the fixing assembly, and a jacking mechanism, a transmission assembly and a pressing assembly are arranged at the upper end of the end cover; the jacking mechanism provides power for the pressing assembly through the transmission assembly. The lower end of the end cover is fixedly connected with a sealing ring and a sealing air bag, the side end of the sealing air bag is fixedly connected with a connecting pipe, the end, away from the sealing air bag, of the connecting pipe penetrates through the end cover and is fixedly connected with the end cover, and the connecting pipe communicates with the pressing assembly. By arranging the fixing assembly, the sealing ring and the sealing air bag, double-layer sealing can be achieved at the joint of the end cover and the transformer oil tank, and therefore leakage of transformer oil is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more particularly to a sealing and leak-proof structure for oil-immersed transformer tanks. Background Technology

[0002] As a core piece of equipment in the power transmission and distribution system, the sealing performance of the oil tank of an oil-immersed transformer directly determines the reliability and service life of the equipment. The transformer oil stored inside the tank not only serves as insulation but also heat dissipation. If there is a problem with the sealing of the tank, it can lead to transformer oil loss and a drop in oil level, causing equipment overheating failure. In severe cases, moisture intrusion can damage the insulation performance and even cause major safety accidents such as winding short circuits and transformer burnout.

[0003] Currently, the sealing structure of oil-immersed transformer tanks mainly adopts the method of "rubber sealing ring + bolt fastening" to achieve the seal between the tank cover and the tank. Although this achieves the sealing effect, the single rubber sealing ring affects the sealing effect. Therefore, it is necessary to design a sealing and anti-leakage structure for oil-immersed transformer tanks. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sealing and leak-proof structure for oil-immersed transformer tanks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an oil-immersed transformer tank sealing and leak-proof structure, comprising a transformer tank, wherein a fixing component and an end cover are provided at the upper end of the transformer tank, the transformer tank is connected to the end cover through the fixing component, and a lifting mechanism, a transmission component and a pressing component are provided at the upper end of the end cover, wherein the lifting mechanism provides power to the pressing component through the transmission component; a sealing ring and a sealing airbag are fixedly connected to the lower end of the end cover, a connecting pipe is fixedly connected to the side end of the sealing airbag, the end of the connecting pipe away from the sealing airbag passes through the end cover and is fixedly connected to the end cover, and the connecting pipe communicates with the pressing component.

[0006] As a further description of the above technical solution: The fixing assembly includes a fixing plate, bolts, and nuts. The fixing plate is fixedly connected to the upper end of the transformer tank. Bolts are installed inside the fixing plate, and the bolts penetrate the end cover. Nuts are threaded onto the circumferential surface of the bolts.

[0007] As a further description of the above technical solution: The lifting mechanism includes a first cylinder, a movable column, a first slide rod, and a first piston. The first cylinder is fixedly connected to the upper end of the end cap. The first piston is slidably connected inside the first cylinder. The movable column is fixedly connected to the upper end of the first piston. The upper end of the movable column passes through the first cylinder and is slidably connected to the first cylinder. The first slide rod is fixedly connected to the surface of the movable column.

[0008] As a further description of the above technical solution: A circular hole is provided on the upper surface of the end cap, and the circular hole corresponds to the first cylinder.

[0009] As a further description of the above technical solution: The transmission assembly includes a support frame, a rotating arm, a first sliding hole, and a second sliding hole. The support frame is fixedly connected to the upper end of the end cap. The rotating arm is rotatably connected inside the support frame. The rotating arm has a first sliding hole and a second sliding hole on both its front and rear sides. The first sliding rod is located inside the first sliding hole and is slidably connected to the first sliding hole.

[0010] As a further description of the above technical solution: The pressing assembly includes a second cylinder, a movable cylinder, a second slide rod, and a second piston. The upper end of the end cap is fixedly connected to the second cylinder, which is connected to a connecting pipe. The second piston is slidably connected inside the second cylinder. The upper end of the second piston is fixedly connected to the movable cylinder, which passes through the second cylinder and is slidably connected to it. The surface of the movable cylinder is fixedly connected to the second slide rod, which is located inside the second sliding hole and is slidably connected to it.

[0011] As a further description of the above technical solution: The upper end of the movable cylinder is internally threaded with a threaded rod, the upper end of which is fixedly connected to a handle, and the lower end of which is rotatably connected to a third piston.

[0012] As a further description of the above technical solution: The upper end of the end cap is fixedly connected with four lifting lugs, which are evenly distributed at the four corners of the upper end of the end cap.

[0013] As a further description of the above technical solution: The transformer tank is fixedly connected to heat sinks on both the front and rear sides.

[0014] As a further description of the above technical solution: The transformer oil tank is fixedly connected to four mounting bases on both the front and rear sides.

[0015] The present invention has the following beneficial effects: 1. Compared with the existing technology, the oil-immersed transformer tank sealing and anti-leakage structure, by setting fixed components, sealing rings and sealing airbags, can achieve double-layer sealing at the connection between the end cover and the transformer tank, thereby effectively preventing transformer oil leakage.

[0016] 2. Compared with existing technologies, this oil-immersed transformer tank sealing and leak-proof structure, through the arrangement of a first cylinder, a movable column, a first sliding rod, a first piston, a support frame, a rotating arm, a first sliding hole, a second sliding hole, a second cylinder, a movable cylinder, a second sliding rod, and a second piston, allows the transformer oil inside the tank to expand when heated. This expansion causes the transformer oil to enter the first cylinder through the circular hole, pushing the first piston upward. As the first piston moves upward, it moves the movable column upward. With the cooperation of the first sliding rod and the first sliding hole, the rotating arm rotates around the support frame. As the rotating arm rotates, with the cooperation of the second sliding rod and the second sliding hole, the movable cylinder slides downward inside the second cylinder, further moving the second piston downward. This forces the gas inside the second cylinder into the connecting pipe, and then into the sealing airbag along the connecting pipe, causing the sealing airbag to expand. This allows the sealing airbag to make tight contact with the inner wall of the transformer tank, thereby improving the sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first-view perspective; Figure 2 This is a schematic diagram of the overall structure of the invention from a second perspective; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of section A in the middle; Figure 5 This is a schematic diagram of the structure of the lifting mechanism, transmission assembly, and pressing assembly of the present invention after they are assembled. Figure 6 This is a schematic diagram of the internal structure of the lifting mechanism, transmission assembly, and pressing assembly of the present invention after they are assembled. Figure 7 For the present invention Figure 6 Enlarged view of section B; Figure 8 This is a schematic diagram of the end cap structure of the present invention.

[0018] Legend: 1. Transformer oil tank; 2. End cover; 3. Fixing assembly; 301. Fixing plate; 302. Bolt; 303. Nut; 4. Lifting mechanism; 401. First cylinder; 402. Moving column; 403. First sliding rod; 404. First piston; 5. Transmission assembly; 501. Support frame; 502. Rotating arm; 503. First sliding hole; 504. Second sliding hole; 6. Pressing assembly; 601. Second cylinder; 602. Moving cylinder; 603. Second sliding rod; 604. Second piston; 7. Lifting lug; 8. Heat sink; 9. Mounting base; 10. Sealing ring; 11. Sealing airbag; 12. Connecting pipe; 13. Threaded rod; 14. Handle; 15. Third piston; 16. Circular hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Reference Figure 1-8 The oil-immersed transformer tank sealing and leak-proof structure provided by the present invention includes a transformer tank 1. A fixing component 3 and an end cover 2 are provided at the upper end of the transformer tank 1. The transformer tank 1 is connected to the end cover 2 through the fixing component 3. A lifting mechanism 4, a transmission component 5 and a pressing component 6 are provided at the upper end of the end cover 2. The lifting mechanism 4 provides power to the pressing component 6 through the transmission component 5. A sealing ring 10 and a sealing airbag 11 are fixedly connected at the lower end of the end cover 2. A connecting pipe 12 is fixedly connected to the side end of the sealing airbag 11. The end of the connecting pipe 12 away from the sealing airbag 11 passes through the end cover 2 and is fixedly connected to the end cover 2. The connecting pipe 12 is connected to the pressing component 6.

[0021] In use, the end cover 2 is fixed to the transformer tank 1 using the fixing component 3. Then, with the cooperation of the sealing ring 10 and the sealing airbag 11, a double seal is achieved at the connection between the end cover 2 and the transformer tank 1, which effectively prevents the leakage of transformer oil. When the transformer oil inside the transformer tank 1 is heated and expands, it provides power to the lifting mechanism 4. Then, with the cooperation of the transmission component 5, the pressing component 6 is activated, and with the cooperation of the connecting pipe 12, the sealing airbag 11 expands. In this way, the sealing airbag 11 can make tight contact with the inner wall of the transformer tank 1, thereby improving the sealing effect of the end cover 2 and further effectively preventing the leakage of transformer oil.

[0022] The fixing component 3 includes a fixing plate 301, bolts 302 and nuts 303. The fixing plate 301 is fixedly connected to the upper end of the transformer tank 1. Bolts 302 are installed inside the fixing plate 301. Bolts 302 pass through the end cover 2. Nuts 303 are threaded on the circumferential surface of bolts 302. During operation, bolts 302 are passed through the end cover 2 and the fixing plate 301, and then nuts 303 are screwed on. At this time, the end cover 2 can be stably fixed to the upper end of the transformer tank 1.

[0023] The lifting mechanism 4 includes a first cylinder 401, a movable column 402, a first sliding rod 403, and a first piston 404. The first cylinder 401 is fixedly connected to the upper end of the end cap 2. The first piston 404 is slidably connected inside the first cylinder 401. The movable column 402 is fixedly connected to the upper end of the first piston 404. The upper end of the movable column 402 passes through the first cylinder 401 and is slidably connected to it. The first sliding rod 403 is fixedly connected to the surface of the movable column 402. A circular hole 16 is provided on the upper surface of the end cap 2, and the circular hole 16 corresponds to the first cylinder 401. The transmission assembly 5 includes a support frame 501, a rotating arm 502, a first sliding hole 503 and a second sliding hole 504. The support frame 501 is fixedly connected to the upper end of the end cover 2. The rotating arm 502 is rotatably connected inside the support frame 501. The first sliding hole 503 and the second sliding hole 504 are provided on both the front and rear sides of the rotating arm 502. The first sliding rod 403 is located inside the first sliding hole 503 and is slidably connected to the first sliding hole 503. The pressing assembly 6 includes a second cylinder 601, a movable cylinder 602, a second slide rod 603, and a second piston 604. The second cylinder 601 is fixedly connected to the upper end of the end cap 2. The second cylinder 601 is connected to the connecting pipe 12. The second piston 604 is slidably connected inside the second cylinder 601. The movable cylinder 602 is fixedly connected to the upper end of the second piston 604. The upper end of the movable cylinder 602 passes through the second cylinder 601 and is slidably connected to the second cylinder 601. The second slide rod 603 is fixedly connected to the surface of the movable cylinder 602. The second slide rod 603 is located inside the second sliding hole 504 and is slidably connected to the second sliding hole 504.

[0024] During use, when the transformer oil expands due to heat, the transformer oil inside the transformer tank 1 enters the first cylinder 401 through the circular hole 16, then compresses the first piston 404 to move upward. As the first piston 404 moves upward, it drives the moving column 402 upward. Then, with the cooperation of the first sliding rod 403 and the first sliding hole 503, it drives the rotating arm 502 to rotate around the support frame 501. As the rotating arm 502 rotates, with the cooperation of the second sliding rod 603 and the second sliding hole 504, it also drives the moving cylinder 602 to slide downward inside the second cylinder 601, thereby driving the second piston 604 to move downward. In this way, the gas inside the second cylinder 601 is compressed into the connecting pipe 12, and then enters the sealing airbag 11 through the connecting pipe 12, causing the sealing airbag 11 to expand. In this way, the sealing airbag 11 can make tight contact with the inner wall of the transformer tank 1, thereby improving the sealing effect.

[0025] The upper end of the movable cylinder 602 is internally threaded with a threaded rod 13. The upper end of the threaded rod 13 is fixedly connected with a handle 14. The lower end of the threaded rod 13 is rotatably connected with a third piston 15. When working, the handle 14 is rotated, and the third piston 15 can be moved under the action of the threaded rod 13. As the third piston 15 moves, the gas inside the movable cylinder 602 is compressed, which helps the sealing airbag 11 to fit against the inner wall of the transformer oil tank 1.

[0026] The upper end of the end cap 2 is fixedly connected with four lifting lugs 7, which are evenly distributed at the four corners of the upper end of the end cap 2. During operation, the lifting lugs 7 facilitate the hoisting of the device.

[0027] The transformer oil tank 1 is fixedly connected to heat sinks 8 on both the front and rear sides. During operation, the heat sinks 8 can improve the heat dissipation effect.

[0028] The transformer oil tank 1 is fixedly connected to four mounting bases 9 on both the front and rear sides. The mounting bases 9 are symmetrically distributed on the front and rear sides of the transformer oil tank 1. During operation, the transformer oil tank 1 can be easily installed in the required location by the mounting bases 9.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof sealing structure for an oil-immersed transformer tank, comprising a transformer tank (1), characterized in that: The transformer oil tank (1) is provided with a fixing component (3) and an end cover (2) at the upper end. The transformer oil tank (1) is connected to the end cover (2) through the fixing component (3). The end cover (2) is provided with a lifting mechanism (4), a transmission component (5) and a pressing component (6) at the upper end. The lifting mechanism (4) provides power to the pressing component (6) through the transmission component (5). The end cover (2) is fixedly connected with a sealing ring (10) and a sealing airbag (11) at the lower end. The sealing airbag (11) is fixedly connected with a connecting pipe (12) at the side end. The end of the connecting pipe (12) away from the sealing airbag (11) passes through the end cover (2) and is fixedly connected to the end cover (2). The connecting pipe (12) is connected to the pressing component (6).

2. The oil-immersed transformer tank sealing and leak-proof structure according to claim 1, characterized in that: The fixing component (3) includes a fixing plate (301), a bolt (302) and a nut (303). The upper end of the transformer tank (1) is fixedly connected to the fixing plate (301). The fixing plate (301) is provided with a bolt (302) inside. The bolt (302) passes through the end cover (2). The circumferential surface of the bolt (302) is threaded with a nut (303).

3. The oil-immersed transformer tank sealing and leak-proof structure according to claim 1, characterized in that: The lifting mechanism (4) includes a first cylinder (401), a movable column (402), a first slide rod (403), and a first piston (404). The upper end of the end cap (2) is fixedly connected to the first cylinder (401). The first piston (404) is slidably connected inside the first cylinder (401). The upper end of the first piston (404) is fixedly connected to the movable column (402). The upper end of the movable column (402) passes through the first cylinder (401) and is slidably connected to the first cylinder (401). The surface of the movable column (402) is fixedly connected to the first slide rod (403).

4. The oil-immersed transformer tank sealing and leak-proof structure according to claim 3, characterized in that: The end cap (2) has a circular hole (16) on its upper surface, which corresponds to the first cylinder (401).

5. The oil-immersed transformer tank sealing and leak-proof structure according to claim 3, characterized in that: The transmission assembly (5) includes a support frame (501), a rotating arm (502), a first sliding hole (503), and a second sliding hole (504). The support frame (501) is fixedly connected to the upper end of the end cap (2). The rotating arm (502) is rotatably connected inside the support frame (501). The first sliding hole (503) and the second sliding hole (504) are provided on both the front and rear sides of the rotating arm (502). The first sliding rod (403) is located inside the first sliding hole (503) and is slidably connected to the first sliding hole (503).

6. The oil-immersed transformer tank sealing and leak-proof structure according to claim 5, characterized in that: The pressing assembly (6) includes a second cylinder (601), a movable cylinder (602), a second slide rod (603), and a second piston (604). The upper end of the end cap (2) is fixedly connected to the second cylinder (601). The second cylinder (601) is connected to the connecting pipe (12). The second piston (604) is slidably connected inside the second cylinder (601). The movable cylinder (602) is fixedly connected to the upper end of the second piston (604). The upper end of the movable cylinder (602) passes through the second cylinder (601) and is slidably connected to the second cylinder (601). The second slide rod (603) is fixedly connected to the surface of the movable cylinder (602). The second slide rod (603) is located inside the second sliding hole (504) and is slidably connected to the second sliding hole (504).

7. The oil-immersed transformer tank sealing and leak-proof structure according to claim 6, characterized in that: The upper end of the movable cylinder (602) is internally threaded with a threaded rod (13), the upper end of the threaded rod (13) is fixedly connected with a handle (14), and the lower end of the threaded rod (13) is rotatably connected with a third piston (15).

8. The oil-immersed transformer tank sealing and leak-proof structure according to claim 1, characterized in that: The end cap (2) is fixedly connected to a lifting lug (7), and there are four lifting lugs (7) evenly distributed at the four corners of the upper end of the end cap (2).

9. The oil-immersed transformer tank sealing and leak-proof structure according to claim 1, characterized in that: The transformer tank (1) is fixedly connected to heat sinks (8) on both the front and rear sides.

10. The oil-immersed transformer tank sealing and leak-proof structure according to claim 1, characterized in that: The transformer oil tank (1) is fixedly connected to the front and rear sides with mounting bases (9). There are four mounting bases (9), which are symmetrically distributed on the front and rear sides of the transformer oil tank (1).

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