An oil-immersed transformer tank

Abstract

This utility model discloses an oil-immersed transformer tank, including a shell, a top plate, a heat dissipation shell, a bottom plate, and a heat dissipation frame. The top of the shell has a U-shaped through slot, and the top plate is connected to the top of the shell. The top of the top plate has multiple threaded holes communicating with the shell, and each threaded hole is threaded with a fixing bolt. A heat dissipation frame is welded to one outer wall of the shell. Heat dissipation slots are formed on both sides of the shell symmetrically opposite the heat dissipation frame, and heat dissipation shells are welded to the inner circumference of each of the two heat dissipation slots. Multiple equally spaced heat dissipation baffles are welded to the side walls of both heat dissipation shells. The inner cavities of the heat dissipation baffles communicate with the interior of the shell. Multiple heat dissipation fins located within the heat dissipation baffles are fixed to the inner side walls of the shell by multiple rivets. Multiple equally spaced heat dissipation plates are welded to the outer wall of the heat dissipation frame. This oil-immersed transformer tank shell has good heat dissipation performance and is easy to install and fix.

Description

Technical Field

[0001] This utility model relates to the technical field of oil-immersed transformer boxes, and in particular to an oil-immersed transformer box. Background Technology

[0002] The oil-immersed transformer tank is the outer shell structure of an oil-immersed transformer, mainly welded from steel plates. It is used to hold transformer oil and fix core components such as the iron core and windings. The tank of medium and small transformers consists of a shell and a cover. The transformer body is placed inside the shell, and the transformer body can be lifted out for maintenance by opening the cover. However, the oil-immersed transformer tanks currently in use are relatively large, which is not conducive to the installation of transformers. Utility Model Content

[0003] The main objective of this invention is to provide an oil-immersed transformer box that can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An oil-immersed transformer tank includes a shell, a top plate, a heat dissipation shell, a bottom plate, and a heat dissipation frame. The shell has a U-shaped through slot on its top, and the top plate is connected to the top of the shell. The top of the top plate has multiple threaded holes communicating with the shell, and each threaded hole is threaded with a fixing bolt. A heat dissipation frame is welded to one outer wall of the shell. Heat dissipation slots are formed on both sides of the shell symmetrically opposite the heat dissipation frame, and heat dissipation shells are welded to the inner circumference of each of the two heat dissipation slots. Multiple equally spaced heat dissipation baffles are welded to the side walls of both heat dissipation shells. The inner cavities of the multiple heat dissipation baffles communicate with the interior of the shell. Multiple heat dissipation fins located within the heat dissipation baffles are fixed to the inner side walls of the shell by multiple rivets. Multiple equally spaced heat dissipation plates are welded to the outer wall of the heat dissipation frame, and the top and bottom of the multiple heat dissipation plates are connected to reinforcing ribs. The components are welded and fixed. Each of the two heat sinks has two grooves on its sidewalls. Bolts that pass through the sign are threaded into the inner circumference of each of the four grooves. The base plate has a sliding groove. The sidewall of the base plate has a circular hole communicating with the sliding groove. A threaded shaft is rotatably connected to the circular hole through a bearing seat. A turntable is welded to the outer wall of the threaded shaft. A crank handle is integrally formed on the sidewall of the turntable. The outer circumference of the threaded shaft is threadedly connected to the horizontal part of two moving blocks. Each of the two moving blocks is integrally formed with a horizontal part located in the sliding groove and two vertical parts located on both sides of the base plate. The top of the horizontal part of each of the two moving blocks has two limiting blocks that are slidably connected to the sidewall of the base plate. Mounting plates located directly below the base plate are welded to the adjacent sides of the vertical parts of the two moving blocks. A straight mounting groove is formed on the surface of each of the two mounting plates.

[0006] More preferably, the surface of the top plate is provided with three high-voltage terminal holes and four low-voltage terminal holes, and four lifting rings arranged in a rectangular array are welded to the top of the top plate.

[0007] More preferably, the surface of the top plate is provided with a circular through hole, and an oil level gauge extending into the housing is fixed to the inner circumference of the circular through hole.

[0008] More preferably, the cross-sections of the plurality of heat sinks are all constructed in a convex shape.

[0009] More preferably, the side wall of the outer casing has a circular through hole, and an oil drain valve is fixed to the inner circumference of the circular through hole.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] In this invention, multiple heat sinks fixed to both sides of the inner shell are immersed in cooling oil, absorbing heat from the oil and dissipating it through the outer heat sink. The cooling oil inside the heat sink is also dissipated through the heat sink, thereby reducing the internal temperature of the shell and extending the service life of the transformer. The invention also incorporates a base plate, threaded shaft, moving blocks, and mounting plates. Rotating the threaded shaft causes two moving blocks to move simultaneously in the same or opposite directions, adjusting the distance between the two mounting plates. This design offers wide applicability and facilitates the installation of the transformer on crossarms fixed between utility poles. The oil-immersed transformer housing provides excellent heat dissipation and is easy to install and fix. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the base plate of this utility model;

[0014] Figure 3 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0015] Figure 4 For the present utility model Figure 2 Enlarged view of the structure at point B.

[0016] In the diagram: 1. Outer shell; 2. Top plate; 3. Heat sink shell; 31. Heat sink fin; 32. Rivet; 4. Base plate; 41. Turntable; 42. Threaded shaft; 43. Moving block; 44. Limiting block; 45. Mounting plate; 5. Heat sink frame; 6. Heat sink plate; 7. Reinforcing rib; 8. Oil level gauge; 9. Lifting ring; 10. Fixing bolt; 11. Oil drain valve. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Participation Figure 1-4 As shown, an oil-immersed transformer box includes a shell 1, a top plate 2, a heat dissipation shell 3, a bottom plate 4, and a heat dissipation frame 5. The shell 1 has a U-shaped through-slot on its top, and the top plate 2 is connected to the top of the shell 1. The top of the top plate 2 has multiple threaded holes communicating with the shell 1, and each threaded hole is threaded with a fastening bolt 10. A heat dissipation frame 5 is welded to one outer side wall of the shell 1. Heat dissipation through-slots are provided on both sides of the shell 1 symmetrically related to the heat dissipation frame 5, and heat dissipation shells 3 are welded to the inner circumference of each of the two heat dissipation through-slots. Multiple heat dissipation baffles are welded to the side walls of both heat dissipation shells 3 at equal intervals, and the inner cavities of the multiple heat dissipation baffles communicate with the interior of the shell 1. Multiple heat dissipation fins 31 located within the heat dissipation baffles are fixed to the inner side walls of the shell 1 by multiple rivets 32. Multiple heat dissipation plates 6 are welded to the outer wall of the heat dissipation frame 5 at equal intervals, and the top and bottom of the multiple heat dissipation plates 6 are connected to reinforcing ribs. 7. Welding and fixing: Two grooves are opened on the side walls of the two heat dissipation plates 6. Bolts that pass through the sign are threaded to the inner circumference of the four grooves. A sliding groove is opened in the bottom plate 4. A round hole communicating with the sliding groove is opened on the side wall of the bottom plate 4. A threaded shaft 42 is rotatably connected to the round hole through a bearing seat. A turntable 41 is welded to the outer wall of the threaded shaft 42. A crank handle is integrally formed on the side wall of the turntable 41. The outer circumference of the threaded shaft 42 is threaded to the horizontal part of two moving blocks 43. Each of the two moving blocks 43 is integrally formed by a horizontal part located in the sliding groove and two vertical parts located on both sides of the bottom plate 4. Two limiting blocks 44 that slide and connect with the side wall of the bottom plate 4 are integrally formed on the top of the horizontal part of the two moving blocks 43. Mounting plates 45 located directly below the bottom plate 4 are welded to the adjacent sides of the vertical part of the two moving blocks 43. A straight mounting groove is opened on the surface of the two mounting plates 45.

[0019] The top plate 2 has three high-voltage terminal holes and four low-voltage terminal holes. Four lifting rings 9 arranged in a rectangular array are welded to the top of the top plate 2. The top plate 2 has a circular through hole, and an oil level gauge 8 extending into the housing 1 is fixed to the inner circumference of the circular through hole. The cross-section of multiple heat sinks 31 is convex. The side wall of the housing 1 has a circular through hole, and an oil drain valve 11 is fixed to the inner circumference of the circular through hole.

[0020] It should be noted that this utility model is an oil-immersed transformer box. After the steel wire rope passes through four lifting rings 9, the outer casing 1 containing the transformer is lifted by external lifting equipment. The outer casing 1 is suspended above the crossarms fixed between the utility poles. The spacing of the crossarms is measured. Then, the threaded shaft 42 is rotated, which drives the two moving blocks 43 to move simultaneously in the same direction or in opposite directions. The spacing between the mounting plates 45 is adjusted to be the same as the spacing of the crossarms. The lifting equipment is then used to lower the outer casing 1 and install the transformer on the crossarms. Multiple heat sinks 31 fixed on both sides inside the outer casing 1 are immersed in cooling oil, absorbing the heat of the cooling oil and dissipating it through the outer heat sink shell 3. The cooling oil in the heat sink 6 dissipates heat through the heat sink 6, thereby reducing the temperature inside the outer casing 1 and extending the service life of the transformer.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed transformer box, comprising a shell (1), a top plate (2), a heat dissipation shell (3), a bottom plate (4), and a heat dissipation frame (5), characterized in that: The top of the outer shell (1) has a U-shaped through slot. The top of the outer shell (1) is connected to a top plate (2). The top of the top plate (2) has multiple threaded holes that communicate with the outer shell (1). Each of the multiple threaded holes is threaded with a fastening bolt (10). A heat dissipation frame (5) is welded to one outer side wall of the outer shell (1). The outer shell (1) has heat dissipation through slots on both sides symmetrical about the heat dissipation frame (5). Heat dissipation shells (3) are welded to the inner circumference of both heat dissipation through slots. Multiple heat dissipation baffles are welded to the side walls of both heat dissipation shells (3). The inner cavities of the multiple heat dissipation baffles are connected to the interior of the outer shell (1). Multiple heat dissipation fins (31) located in the heat dissipation baffles are fixed to the inner side walls of the outer shell (1) by multiple rivets (32). Multiple heat dissipation plates (6) are welded to the outer wall of the heat dissipation frame (5). The top and bottom of the multiple heat dissipation plates (6) are welded to the reinforcing ribs (7). Each of the four walls has two grooves, and bolts for penetrating the sign are threaded into the inner circumference of each groove. A sliding groove is provided in the base plate (4), and a circular hole communicating with the sliding groove is provided on the side wall of the base plate (4). A threaded shaft (42) is rotatably connected to the circular hole via a bearing seat. A turntable (41) is welded to the outer wall of the threaded shaft (42), and a crank handle is integrally formed on the side wall of the turntable (41). The outer circumference of the threaded shaft (42) is threadedly connected to the transverse portion of two moving blocks (43). Each of the movable blocks (43) is integrally formed from a horizontal part located in the groove and two vertical parts located on both sides of the base plate (4). The top of the horizontal part of each of the two movable blocks (43) is integrally formed with two limiting blocks (44) that are slidably connected to the side wall of the base plate (4). The adjacent sides of the vertical part of each of the two movable blocks (43) are welded with mounting plates (45) located directly below the base plate (4). The surfaces of the two mounting plates (45) are provided with a straight mounting groove.

2. The oil-immersed transformer box according to claim 1, characterized in that: The surface of the top plate (2) is provided with three high-voltage terminal holes and four low-voltage terminal holes, and four lifting rings (9) arranged in a rectangular array are welded to the top of the top plate (2).

3. The oil-immersed transformer box according to claim 2, characterized in that: The surface of the top plate (2) is provided with a circular through hole, and an oil level gauge (8) extending into the housing (1) is fixed on the inner circumference of the circular through hole.

4. The oil-immersed transformer box according to claim 3, characterized in that: The cross-sections of the multiple heat sinks (31) are all constructed in a convex shape.

5. The oil-immersed transformer box according to claim 4, characterized in that: The outer casing (1) has a circular through hole on its side wall, and an oil drain valve (11) is fixed on the inner circumference of the circular through hole.

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