Oil-immersed transformer capable of automatically cooling

Abstract

The self-cooling oil-immersed transformer comprises a transformer shell and an oil tank, a base is fixedly installed on the lower surface of the transformer shell, cooling fins are fixedly installed on the surface of the transformer shell, and a wire set is fixedly installed on the inner wall of the transformer shell; a connecting plate is mounted on the upper surface of the transformer shell through bolts; the device further comprises an upper pump machine, the upper pump machine is fixedly installed on the upper surface of the oil tank, and a first connecting pipe is fixedly installed at an inlet of the upper pump machine. According to the oil-immersed transformer capable of cooling automatically, when the device works with high intensity and the temperature in the transformer shell rises, helium in the fixed pipe is heated to expand to push the movable rod to rise, when the movable rod makes contact with the controller, the upper pump machine works, cold oil in the oil tank enters the transformer shell, and then the lower pump machine works; and hot oil at the lower end of the transformer shell enters the oil tank, so that the oil changing effect is achieved, and finally the purpose of cooling is achieved.

Description

Technical Field

[0001] This invention relates to the field of oil-immersed transformer technology, specifically to an oil-immersed transformer capable of self-cooling. Background Technology

[0002] Oil-immersed transformers are widely used in urban and rural areas, industrial and mining sectors. When in use, oil-immersed transformers can insulate the conductors from other parts and separate different energized parts, resulting in high safety.

[0003] An oil-immersed transformer, such as the one disclosed in CN210805455U, includes a transformer body, an oil tank, and a water-cooled circulating pump. A water-cooled circulating pipe is spirally arranged inside the cooling base, with its input and output ends connected to the output and input ends of the water-cooled circulating pump, respectively. An oil injection pipe is connected to the top of the oil tank, and its input end is connected to a filter box. A sealing gasket with a cross-shaped hole is installed inside the injection port, and a spiral sealing cap is installed on the top of the injection port. This oil-immersed transformer significantly improves heat dissipation during operation, preventing accelerated aging of the transformer's input and output lines due to poor heat dissipation. Furthermore, the oil added to the tank is filtered before being added, minimizing the possibility of impurities in the oil and preventing structural malfunctions caused by these impurities.

[0004] For example, an oil-immersed transformer with publication number CN203338920U includes an oil tank and a transformer core assembly immersed in the oil tank. A tank cover is provided at the upper end of the oil tank. The terminals of the transformer core assembly are led out through the tank cover. An upper clamp and a lower clamp are respectively provided at the upper and lower ends of the transformer core assembly. The upper clamp and the lower clamp are tightened by a pull screw. The upper clamp and the tank cover are tightened by a lifting screw. Part of the pull screw passes through the upper clamp and is connected to the lifting screw to form a long screw. This utility model improves the screw structure used for connection, so that the lifting screw and the pull screw are connected to each other. This reduces the number of installation accessories, thus reducing noise caused by loosening, saving workers' assembly time, and increasing the mechanical strength of the lifting screw.

[0005] The devices mentioned in the above applications are all just heat dissipation structures for the transformer itself, without any additional heat dissipation structures. This results in poor overall heat dissipation of the transformer. When the transformer is operating at high temperature or for a long time under high intensity, the internal temperature of the transformer is high. If heat dissipation is not done quickly, it will affect the continued use of the transformer. In severe cases, it may cause safety accidents and bring unnecessary trouble.

[0006] To address the aforementioned issues, there is an urgent need for innovative designs based on the existing oil-immersed transformers. Summary of the Invention

[0007] The purpose of this invention is to provide a self-cooling oil-immersed transformer to solve the problem of poor overall heat dissipation of transformers mentioned in the background art. When the transformer is operating at high temperature or for a long time under high intensity, the internal temperature of the transformer is high. If heat dissipation is not rapid, it will affect the continued use of the transformer and may even cause safety accidents in severe cases, bringing unnecessary trouble.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an oil-immersed transformer capable of self-cooling, comprising a transformer shell and an oil tank, wherein a base is fixedly installed on the lower surface of the transformer shell, and heat sinks are fixedly installed on the surface of the transformer shell, and a wire assembly is fixedly installed on the inner wall of the transformer shell, and a connecting plate is bolted to the upper surface of the transformer shell.

[0009] The oil tank is fixedly installed on the side of the transformer casing, and the oil tanks are symmetrically distributed about the center of the transformer casing;

[0010] A self-cooling oil-immersed transformer also includes:

[0011] The upper pump is fixedly installed on the upper surface of the oil tank, and a first connecting pipe is fixedly installed at the inlet of the upper pump and a second connecting pipe is fixedly installed at the outlet of the upper pump.

[0012] The lower pump is fixedly installed on the lower surface of the oil tank, and a first connecting pipe is fixedly installed at the inlet of the lower pump, and a second connecting pipe is fixedly installed at the outlet of the lower pump.

[0013] A connecting shaft is rotatably connected inside the transformer housing, and a baffle is fixedly installed on the surface of the connecting shaft, and a limit tube is fixedly installed on the inner wall of the transformer housing;

[0014] A fixed frame is fixedly installed on the upper surface of the connecting plate, and a controller is fixedly installed on the inner wall of the fixed frame. The controller is electrically connected to both the upper pump and the lower pump.

[0015] A long pin is rotatably connected inside the limiting tube, and a stirring blade is fixedly installed on the surface of the long pin.

[0016] A fixing plate is fixedly installed on the inner wall of the transformer housing, and a column is fixedly installed on the upper surface of the fixing plate. A floating plate is sleeved and connected to the surface of the column, and a docking plate is fixedly installed on the inner wall of the transformer housing.

[0017] A rotating shaft is rotatably connected inside the docking plate, and long plates are fixedly installed on both the upper and lower sides of the rotating shaft.

[0018] Preferably, a fixing tube is fixedly installed on the lower surface of the connecting plate, and a movable rod is slidably connected inside the fixing tube. The movable rod is symmetrically distributed about the center of the transformer shell, and the fixing tube is filled with helium. When the device is working at high intensity and the temperature inside the transformer shell rises, the helium inside the fixing tube expands due to heat, pushing the movable rod upward.

[0019] Preferably, limit blocks are fixedly installed on both the left and right sides of the moving rod, and the moving rod passes through the interior of the transformer housing. The moving rod corresponds one-to-one with the controller. When the moving rod rises, it will eventually contact the controller, causing the controller to start the upper and lower pumps.

[0020] Preferably, the baffles are distributed at equal angles on the surface of the connecting shaft, and bevel gears are fixedly installed at the end of the connecting shaft and the end of the long pin. When the pump is started, cold oil enters the transformer housing from the oil tank through the first connecting pipe and the second connecting pipe, and then the oil will drive the connecting shaft to rotate through the baffles.

[0021] Preferably, the portion of the connecting shaft located inside the transformer housing is protruding. When the connecting shaft rotates, the portion inside the transformer housing remains protruding, making the rotation of the connecting shaft more stable.

[0022] Preferably, the stirring blades are evenly distributed on the surface of the long pin, and sliders are fixedly installed on both the left and right sides of the long pin. When the connecting shaft rotates, the long pin is driven to rotate inside the limiting tube through the bevel gear. When the long pin rotates, it drives the evenly distributed stirring blades to rotate synchronously. When the stirring blades rotate, they can agitate the oil, making it easier for the heat of the oil to be discharged through the transformer shell and heat sink, thus optimizing the heat dissipation effect. After the cold oil enters the inside of the transformer shell, the pump is started, allowing the hot oil on the lower side of the transformer shell to enter the oil tank, thereby achieving the effect of oil replacement and ultimately achieving the purpose of cooling.

[0023] Preferably, the floats are symmetrically distributed about the center of the transformer casing, and the sides of the floats are fixedly connected with traction ropes. The floats correspond one-to-one with the rotating shaft. When cold oil enters the transformer casing, the oil level rises, and the floats rise synchronously.

[0024] Preferably, the other side of the traction rope is wound and fixedly connected to the surface of the rotating shaft, and the part of the rotating shaft inside the docking plate is protruding. When the float rises, the traction rope drives the rotating shaft to rotate inside the docking plate (at this time, the torsion spring is stretched).

[0025] Preferably, the upright is viewed as a "T" shape in cross section. When the float rises, the upright causes the float to move only in the vertical direction. The "T" shaped upright restricts the movement distance of the float and improves stability.

[0026] Preferably, a torsion spring for elastic reset is fixedly installed on the side of the rotating shaft, and the other side of the torsion spring is fixedly connected to the inner wall of the docking plate. When the rotating shaft rotates inside the docking plate, it will drive the long plate to rotate synchronously. When the long plate rotates, it will also have the effect of shaking the oil. In conjunction with the stirring blade, it will further optimize the heat dissipation effect. When the hot oil enters the oil tank, the float plate descends. At this time, the rotating shaft will rotate under the action of the torsion spring. When the rotating shaft rotates, it will rewind the traction rope for the next use (when the rotating shaft rotates, it will drive the long plate to rotate, which will shake the oil again and cool the oil again).

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: This self-cooling oil-immersed transformer adopts a novel structural design, the specific details of which are as follows:

[0028] (1) When the device is working under high intensity and the temperature inside the transformer shell rises, the helium gas inside the fixed tube expands due to heat, pushing the moving rod to rise. When the moving rod contacts the controller, the upper pump works, allowing the cold oil inside the oil tank to enter the transformer shell. Then the lower pump works, allowing the hot oil at the bottom of the transformer shell to enter the oil tank, thus achieving the effect of changing the oil and ultimately achieving the purpose of cooling.

[0029] (2) When the cold oil enters the transformer shell, the oil level rises and the float rises synchronously. When the float rises, the shaft is driven to rotate inside the docking plate by the traction rope. In turn, the shaft will drive the long plate to rotate synchronously. When the long plate rotates, it also has the effect of shaking the oil. In conjunction with the stirring blade, the heat dissipation effect is further optimized.

[0030] (3) When the self-cooling oil-immersed transformer rotates, it will stretch the torsion spring. During the process of hot oil entering the oil tank, the float descends. At this time, the shaft rotates under the action of the torsion spring. When the shaft rotates, it will rewind the traction rope for easy use next time. At the same time, when the shaft rotates, it will drive the long plate to rotate, which will shake the oil again, that is, cool the oil again, ensuring the overall working temperature of the device and making the overall operation of the device more stable and safe. Attached Figure Description

[0031] Figure 1 This is a front view of the transformer casing structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the front sectional view of the transformer casing of the present invention;

[0033] Figure 3 This is a partial front sectional view of the movable rod in its working state, as shown in the schematic diagram.

[0034] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0035] Figure 5 This is a schematic diagram of the connection structure between the long pin and the stirring blade of the present invention;

[0036] Figure 6 This is a schematic diagram of the connection structure between the connecting shaft and the bevel gear of the present invention;

[0037] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B;

[0038] Figure 8 This is a partial front sectional view of the floating plate in operation according to the present invention.

[0039] Figure 9 For the present invention Figure 5 Enlarged structural diagram at point C.

[0040] In the diagram: 1. Transformer casing; 2. Heat sink; 3. Wiring assembly; 4. Oil tank; 5. Upper pump; 6. Connecting plate; 7. First connecting pipe; 8. Second connecting pipe; 9. Lower pump; 10. First connecting pipe; 11. Second connecting pipe; 12. Connecting shaft; 13. Baffle; 14. Fixing frame; 15. Controller; 16. Moving rod; 17. Fixing pipe; 18. Limiting block; 19. Long pin; 20. Limiting pipe; 21. Slider; 22. Bevel gear; 23. Stirring blade; 24. Float plate; 25. Column; 26. Fixing plate; 27. Traction rope; 28. Rotating shaft; 29. ​​Connecting plate; 30. Torsion spring; 31. Long plate. Detailed Implementation

[0041] 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.

[0042] Please see Figures 1-9The present invention provides a technical solution: a self-cooling oil-immersed transformer, including a transformer shell 1 and an oil tank 4. A base is fixedly installed on the lower surface of the transformer shell 1, and heat sinks 2 are fixedly installed on the surface of the transformer shell 1. A wire group 3 is fixedly installed on the inner wall of the transformer shell 1, and a connecting plate 6 is bolted to the upper surface of the transformer shell 1. The oil tank 4 is fixedly installed on the side of the transformer shell 1, and the oil tank 4 is symmetrically distributed about the center of the transformer shell 1.

[0043] A self-cooling oil-immersed transformer also includes:

[0044] The upper pump 5 is fixedly installed on the upper surface of the oil tank 4, and a first connecting pipe 7 is fixedly installed at the inlet of the upper pump 5, and a second connecting pipe 8 is fixedly installed at the outlet of the upper pump 5.

[0045] The lower pump 9 is fixedly installed on the lower surface of the oil tank 4, and a first connecting pipe 10 is fixedly installed at the inlet of the lower pump 9, and a second connecting pipe 11 is fixedly installed at the outlet of the lower pump 9. The connecting shaft 12 is rotatably connected to the inside of the transformer housing 1, and a baffle 13 is fixedly installed on the surface of the connecting shaft 12. A limit tube 20 is fixedly installed on the inner wall of the transformer housing 1.

[0046] The fixed frame 14 is fixedly installed on the upper surface of the connecting plate 6, and the controller 15 is fixedly installed on the inner wall of the fixed frame 14. The controller 15 is electrically connected to both the upper pump 5 and the lower pump 9.

[0047] Long pin 19 is rotatably connected to the inside of limit tube 20, and stirring blade 23 is fixedly installed on the surface of long pin 19.

[0048] A fixing plate 26 is fixedly installed on the inner wall of the transformer housing 1, and a column 25 is fixedly installed on the upper surface of the fixing plate 26. A floating plate 24 is sleeved and connected to the surface of the column 25. A docking plate 29 is fixedly installed on the inner wall of the transformer housing 1. A rotating shaft 28 is rotatably connected to the inside of the docking plate 29, and long plates 31 are fixedly installed on both the upper and lower sides of the rotating shaft 28.

[0049] A fixing tube 17 is fixedly installed on the lower surface of the connecting plate 6, and a moving rod 16 is slidably connected inside the fixing tube 17. The moving rod 16 is symmetrically distributed about the center of the transformer shell 1. The fixing tube 17 is filled with helium. Limiting blocks 18 are fixedly installed on both the left and right sides of the moving rod 16. The moving rod 16 passes through the interior of the transformer shell 1, and the moving rod 16 corresponds one-to-one with the controller 15.

[0050] The baffles 13 are evenly distributed on the surface of the connecting shaft 12, and bevel gears 22 are fixedly installed at the end of the connecting shaft 12 and the end of the long pin 19. The part of the connecting shaft 12 located inside the transformer housing 1 is protruding. The stirring blades 23 are evenly distributed on the surface of the long pin 19, and sliders 21 are fixedly installed on both the left and right sides of the long pin 19.

[0051] When the device operates under high intensity and the temperature inside the transformer casing 1 rises, the helium gas inside the fixed tube 17 expands due to heat, and the gas pressure pushes the moving rod 16 upward. The limit block 18 restricts the movement distance of the moving rod 16, improving stability. When the moving rod 16 rises, it will eventually contact the controller 15 inside the fixed frame 14, causing the controller 15 to start the upper pump 5 and the lower pump 9 (the lower pump 9 starts after the upper pump 5). When the upper pump 5 starts, cold oil enters the transformer casing 1 from the oil tank 4 through the first connecting pipe 7 and the second connecting pipe 8, and then the oil will pass through... The baffle 13 drives the connecting shaft 12 to rotate. When the connecting shaft 12 rotates, it drives the long pin 19 to rotate inside the limiting tube 20 through the bevel gear 22. When the long pin 19 rotates, it drives the equally spaced stirring blades 23 to rotate synchronously. When the stirring blades 23 rotate, they can shake the oil, making it easier for the heat of the oil to be discharged through the transformer shell 1 and the heat sink 2, thus optimizing the heat dissipation effect. After the cold oil enters the transformer shell 1, the pump 9 starts, allowing the hot oil on the lower side of the transformer shell 1 to enter the oil tank 4, thus achieving the effect of oil replacement and ultimately achieving the purpose of cooling.

[0052] The floats 24 are symmetrically distributed about the center of the transformer casing 1, and the sides of the floats 24 are fixedly connected with traction ropes 27. The floats 24 correspond one-to-one with the rotating shafts 28. The other side of the traction ropes 27 is wrapped and fixedly connected to the surface of the rotating shafts 28. The part of the rotating shafts 28 located inside the docking plate 29 is protruding. The cross section of the column 25 is considered to be "T". The side of the rotating shafts 28 is fixedly installed with torsion springs 30 that play an elastic reset role, and the other side of the torsion springs 30 is fixedly connected to the inner wall of the docking plate 29.

[0053] When cold oil enters the transformer casing 1, the oil level rises, and the float 24 rises synchronously. As the float 24 rises (limited by the column 25, the float 24 only moves in the vertical direction), the traction rope 27 drives the rotating shaft 28 to rotate inside the docking plate 29 (at this time, the torsion spring 30 is stretched). When the rotating shaft 28 rotates inside the docking plate 29, it drives the long plate 31 to rotate synchronously. When the long plate 31 rotates, it also has the effect of shaking the oil. In conjunction with the stirring blade 23, it further optimizes the heat dissipation effect. When the lower pump 9 is working, as hot oil enters the oil tank 4 through the first connecting pipe 10 and the second connecting pipe 11, the float 24 descends. At this time, the rotating shaft 28 rotates under the action of the torsion spring 30. When the rotating shaft 28 rotates, it will rewind the traction rope 27 for the next use. At the same time, when the rotating shaft 28 rotates, it also drives the long plate 31 to rotate, which will shake the oil again and cool the oil again.

[0054] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0055] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] 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 self-cooling oil-immersed transformer, comprising a transformer shell (1) and an oil tank (4), wherein a base is fixedly installed on the lower surface of the transformer shell (1), and heat sinks (2) are fixedly installed on the surface of the transformer shell (1), and a wire assembly (3) is fixedly installed on the inner wall of the transformer shell (1), and a connecting plate (6) is bolted to the upper surface of the transformer shell (1). The oil tank (4) is fixedly installed on the side of the transformer shell (1), and the oil tank (4) is symmetrically distributed about the center of the transformer shell (1); Its features are, Also includes: The upper pump (5) is fixedly installed on the upper surface of the oil tank (4), and a first connecting pipe (7) is fixedly installed at the inlet of the upper pump (5), and a second connecting pipe (8) is fixedly installed at the outlet of the upper pump (5). The lower pump (9) is fixedly installed on the lower surface of the oil tank (4), and a first connecting pipe (10) is fixedly installed at the inlet of the lower pump (9), and a second connecting pipe (11) is fixedly installed at the outlet of the lower pump (9). A connecting shaft (12) is rotatably connected inside the transformer housing (1), and a baffle (13) is fixedly installed on the surface of the connecting shaft (12), and a limit tube (20) is fixedly installed on the inner wall of the transformer housing (1); A fixed frame (14) is fixedly installed on the upper surface of the connecting plate (6), and a controller (15) is fixedly installed on the inner wall of the fixed frame (14). The controller (15) is electrically connected to the upper pump (5) and the lower pump (9). Long pin (19), which is rotatably connected to the inside of the limiting tube (20), and a stirring blade (23) is fixedly installed on the surface of the long pin (19); A fixing plate (26) is fixedly installed on the inner wall of the transformer housing (1), and a column (25) is fixedly installed on the upper surface of the fixing plate (26), and a floating plate (24) is sleeved and connected on the surface of the column (25), and a docking plate (29) is fixedly installed on the inner wall of the transformer housing (1). A rotating shaft (28) is rotatably connected inside the docking plate (29), and long plates (31) are fixedly installed on both the upper and lower sides of the rotating shaft (28).

2. The self-cooling oil-immersed transformer according to claim 1, characterized in that: A fixing tube (17) is fixedly installed on the lower surface of the connecting plate (6), and a moving rod (16) is slidably connected inside the fixing tube (17). The moving rod (16) is symmetrically distributed about the center of the transformer shell (1), and the fixing tube (17) is filled with helium.

3. The self-cooling oil-immersed transformer according to claim 2, characterized in that: Limiting blocks (18) are fixedly installed on both the left and right sides of the moving rod (16), and the moving rod (16) passes through the interior of the transformer housing (1), and the moving rod (16) corresponds one-to-one with the controller (15).

4. The self-cooling oil-immersed transformer according to claim 1, characterized in that: The baffles (13) are distributed at equal angles on the surface of the connecting shaft (12), and bevel gears (22) are fixedly installed at the end of the connecting shaft (12) and the end of the long pin (19).

5. The self-cooling oil-immersed transformer according to claim 1, characterized in that: The portion of the connecting shaft (12) located inside the transformer housing (1) is protruding.

6. The self-cooling oil-immersed transformer according to claim 1, characterized in that: The stirring blades (23) are evenly distributed on the surface of the long pin (19), and sliders (21) are fixedly installed on both the left and right sides of the long pin (19).

7. The self-cooling oil-immersed transformer according to claim 1, characterized in that: The floats (24) are symmetrically distributed about the center of the transformer shell (1), and the sides of the floats (24) are fixedly connected with traction ropes (27), and the floats (24) correspond one-to-one with the rotating shaft (28).

8. A self-cooling oil-immersed transformer according to claim 7, characterized in that: The other side of the traction rope (27) is wound and fixedly connected to the surface of the rotating shaft (28), and the part of the rotating shaft (28) located inside the docking plate (29) is protruding.

9. A self-cooling oil-immersed transformer according to claim 1, characterized in that: The upright section of the column (25) is considered to be "T" shaped.

10. A self-cooling oil-immersed transformer according to claim 1, characterized in that: A torsion spring (30) for elastic reset is fixedly installed on the side of the rotating shaft (28), and the other side of the torsion spring (30) is fixedly connected to the inner wall of the docking plate (29).

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