Oil-immersed transformer
The fixing structure of the pressure plate and the connecting plate solves the displacement problem of the components of the oil-immersed transformer during transportation and hoisting, achieving better short-circuit resistance and firm positioning, and improving power grid safety and energy efficiency.
Patent Information
- Application Number
- CN202420252713.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-01
AI Technical Summary
During transportation and hoisting, the components of an oil-immersed transformer are prone to relative displacement, which can lead to short circuit hazards, affect the use of the transformer, or even cause it to burn out.
The transformer body is secured by a fixed structure consisting of pressure plates and connecting plates, connected by bolts and nuts. Combined with clamps, pads, insulation plates, and other components, this ensures that the components are firmly positioned and reduces the risk of displacement.
It effectively avoids the risk of short circuits during transportation and hoisting, improves short circuit resistance, reduces noise, ensures the safe operation of the power grid, and reduces energy consumption.
Smart Images
Figure CN222338029U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to an oil-immersed transformer. Background Art
[0002] As an important equipment, the stability of the performance and safety of the oil-immersed transformer in operation have always been the focus of attention. Since there is a certain gap between the oil tank and the transformer body and between the iron core and the coil of the oil-immersed transformer, the components of the oil-immersed transformer are prone to relative displacement during transportation and hoisting, thus causing the risk of short circuit. During the operation of the transformer, once a short circuit occurs, the coil is easy to deform, affecting the use of the transformer or even burning it. Utility Model Content
[0003] In order to solve the problem that relative displacement between components in the above-mentioned oil-immersed transformer is easy to occur and cause short-circuit hazards, the utility model provides an oil-immersed transformer, which can better compress and fix the transformer body and has good short-circuit resistance.
[0004] The technical solution adopted by the embodiment of the utility model to solve the technical problem is:
[0005] An oil-immersed transformer comprises an oil tank and a transformer body. The transformer body is located inside the oil tank. The oil tank comprises a side wall and a bottom wall. A connecting plate is fixed to the inner surface of the side wall of the oil tank. The transformer body comprises a pressing plate and an iron core. The pressing plate is fixed above the iron core. The pressing plate is connected and fixed to the connecting plate.
[0006] The side peripheral wall includes two long side walls arranged front and back and two short side walls arranged left and right. The connecting plate is located on the upper part of the two short side walls. The connecting plate is in a horizontal state. The left and right ends of the pressing plate are respectively connected and fixed to the two connecting plates.
[0007] The pressure plate includes a main body plate, which is a long strip structure and extends in the left and right directions. The front side of the main body plate is connected to a left front support plate and a right front support plate arranged at intervals on the left and right sides, and the rear side of the main body plate is connected to a left rear support plate and a right rear support plate arranged at intervals on the left and right sides.
[0008] The connecting plate is parallel to the horizontal plane, the left front support plate and the right front support plate are symmetrical and mirror images of each other, the left rear support plate and the right rear support plate are symmetrical and mirror images of each other, the left front support plate and the left rear support plate are symmetrical front and back and mirror images of each other, the right front support plate and the right rear support plate are symmetrical front and back and mirror images of each other, and there is a spacing between the left end of the main plate and the left front support plate.
[0009] The left end of the main body plate is connected and fixed to the left connecting plate by bolts and nuts, and the right end of the main body plate is also connected and fixed to the right connecting plate by bolts and nuts.
[0010] The transformer body also includes a clamp, which includes a front upper clamp, a front lower clamp, a rear upper clamp and a rear lower clamp. The upper parts of multiple iron cores are clamped and fixed between the front upper clamp and the rear upper clamp. The upper end surface of the iron core, the upper end surface of the front upper clamp and the upper end surface of the rear upper clamp are flush, and the lower parts of multiple iron cores are clamped and fixed between the front lower clamp and the rear lower clamp.
[0011] The front end of the left front support plate is connected and fixed to the front upper clamping strip by bolts and nuts, the front end of the right front support plate is also connected and fixed to the front upper clamping strip by bolts and nuts, the rear end of the left rear support plate is also connected and fixed to the rear upper clamping strip by bolts and nuts, and the rear end of the right rear support plate is also connected and fixed to the rear upper clamping strip by bolts and nuts.
[0012] The oil-immersed transformer also includes two pads arranged at intervals on the left and right, the pads are in a strip-shaped structure, and the pads extend in the front-to-back direction. The transformer body contains three iron cores arranged in sequence from left to right. The pad on the left is located between the left front support plate and the front upper clamping strip, and the pad on the left is also located between the left rear support plate and the rear upper clamping strip. The upper end of the iron core on the left abuts against the pad on the left, the pad on the right is located between the right front support plate and the front upper clamping strip, and the pad on the right is also located between the right rear support plate and the rear upper clamping strip. The upper end of the iron core on the right abuts against the pad on the right.
[0013] The oil-immersed transformer also includes two insulating plates spaced apart from each other on the left and right sides, the insulating plate on the left side is located between the left front support plate and the pad on the left side, the insulating plate on the left side is also located between the left rear support plate and the pad on the left side, the insulating plate on the right side is located between the right front support plate and the pad on the right side, and the insulating plate on the right side is also located between the right rear support plate and the pad on the right side.
[0014] The inner surfaces of the two long side walls and the inner surfaces of the two short side walls are both laminated and fixedly connected with reinforcing plates, on which a plurality of oil-passing through holes are arranged in a circular shape and in regular rows and columns.
[0015] The beneficial effects of the embodiments of the utility model are:
[0016] 1. The oil-immersed transformer can better compress and fix the transformer body, avoid the hidden danger of short circuit caused by displacement during transportation and hoisting, and has good short-circuit resistance.
[0017] 2. The components in the oil-immersed transformer are firmly positioned, which can reduce noise to a certain extent.
[0018] 3. It is of great significance to the safe operation of the power grid and the reduction of energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0020] Figure 1 It is a front view schematic diagram of the oil-immersed transformer of the utility model.
[0021] Figure 2 The fuel tank Figure 1 Schematic cross-sectional view along the AA direction.
[0022] Figure 3 It is a top view of the fuel tank.
[0023] Figure 4 It is a three-dimensional schematic diagram of the fuel tank.
[0024] Figure 5 It is a three-dimensional cross-sectional schematic diagram of the fuel tank.
[0025] Figure 6 It is a schematic diagram of the main view of the transformer body in the oil tank.
[0026] Figure 7 It is a top view schematic diagram of the transformer body.
[0027] Figure 8 The transformer body Figure 6 Schematic diagram of a partial cross-section along the BB direction.
[0028] Fig. 9 It is a top view schematic diagram of the pressure plate.
[0029] Fig.10 It is a schematic diagram of the front view of the reinforcement plate.
[0030] The following are the descriptions of the reference numerals:
[0031] 1. Oil tank; 2. Transformer body; 3. Corrugated plate group; 4. Reinforcement rod;
[0032] 11. Side wall; 12. Bottom wall; 13. Connecting plate; 14. Reinforcement plate; 15. Vertical angle steel;
[0033] 21. Pressing plate; 22. Iron core; 23. Clamp; 24. Spacer; 25. Insulating plate;
[0034] 111, long side wall; 112, short side wall;
[0035] 141, oil through hole;
[0036] 211, main body plate; 212, left front support plate; 213, right front support plate; 214, left rear support plate; 215, right rear support plate;
[0037] 231. Front upper clamping strip; 232. Front lower clamping strip; 233. Rear upper clamping strip; 234. Rear lower clamping strip. Detailed implementation mode
[0038] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.
[0039] For the convenience of understanding and description, the following description of the present utility model adopts an absolute positional relationship. Without special explanation, the orientation word "upper" herein represents Figure 6 the upper side direction in Figure 6 the lower side direction in Figure 6 the left side direction in Figure 6 the right side direction in Figure 6 the direction perpendicular to the paper surface in Figure 6 and pointing to the inner side of the paper surface, and the orientation word "rear" represents the direction perpendicular to the paper surface in
[0040] such as Figures 1 to 7 As shown, an oil-immersed transformer described in an embodiment of the present utility model includes an oil tank 1 and a transformer body 2. The transformer body 2 is located inside the oil tank 1. The oil tank 1 includes a side peripheral wall 11 and a bottom wall 12 connected up and down. A connecting plate 13 is fixed on the inner surface of the side peripheral wall 11 of the oil tank 1. The transformer body 2 includes a pressing plate 21 and an iron core 22. The pressing plate 21 is fixed above the iron core 22, and the pressing plate 21 is fixedly connected to the connecting plate 13.
[0041] The pressing plate 21 is fixedly connected to the connecting plate 13, and the pressing plate 21 can better press and fix the transformer body 2, avoiding the potential short-circuit hazard caused by displacement during transportation and hoisting, and having better short-circuit resistance. In addition, the components in the oil-immersed transformer are firmly positioned, which can reduce noise to a certain extent, and is of great significance to the safe operation of the power grid and energy consumption reduction. The oil-immersed transformer can better press and fix the body of the transformer. Even when a short circuit occurs in the coil, the oil tank is further strengthened and will not cause greater losses.
[0042] such as Figures 4 to 5As shown, the side peripheral wall 11 includes two long side walls 111 arranged front and back and two short side walls 112 arranged left and right, the connecting plate 13 is welded to the upper part of the two short side walls 112, the connecting plate 13 is rectangular, and the connecting plate 13 is in a horizontal state, and the left and right ends of the pressing plate 21 are respectively connected and fixed to the connecting plates 13 on the two short side walls 112, which can prevent the transformer body 2 from moving and rotating relative to the oil tank 1 to the greatest extent. The material of the pressing plate 21 can be a metal material or an insulating material, for example, the pressing plate 21 can be a steel plate, or the pressing plate 21 can also be an epoxy resin plate.
[0043] like Fig. 9 As shown, the pressing plate 21 includes a main body plate 211, which is a long strip structure, and the main body plate 211 extends in the left-right direction. The front side of the main body plate 211 is connected to the left front support plate 212 and the right front support plate 213 arranged at intervals on the left and right, and the rear side of the main body plate 211 is connected to the left rear support plate 214 and the right rear support plate 215 arranged at intervals on the left and right. The main body plate 211, the left front support plate 212, the right front support plate 213, the left rear support plate 214 and the right rear support plate 215 are connected as a whole. It can be understood that the pressing plate 21 is cut from a whole plate.
[0044] The connecting plate 13 is in a horizontal state, that is, the connecting plate 13 is parallel to the horizontal plane. The left front support plate 212 and the right front support plate 213 are symmetrical and mirror images of each other, the left rear support plate 214 and the right rear support plate 215 are symmetrical and mirror images of each other, the left front support plate 212 and the left rear support plate 214 are symmetrical and mirror images of each other, the right front support plate 213 and the right rear support plate 215 are symmetrical and mirror images of each other, there is a gap between the left end of the main plate 211 and the left front support plate 212, and there is also a gap between the right end of the main plate 211 and the right front support plate 213.
[0045] The left and right ends of the main plate 211 are both provided with mounting through holes, the left end of the main plate 211 is connected and fixed to the left connecting plate 13 by bolts and nuts, and the right end of the main plate 211 is also connected and fixed to the right connecting plate 13 by bolts and nuts. The pressing plate 21 and the connecting plate 13 are stacked up and down, and the pressing plate 21 and the connecting plate 13 are connected and fixed by bolts and nuts, which has the advantages of convenient connection, stability and reliability.
[0046] like Figure 8As shown, in order to prevent the transformer body 2 from deforming in the front-to-back direction, the transformer body 2 further includes a clamp 23, which includes a front upper clamp 231, a front lower clamp 232, a rear upper clamp 233 and a rear lower clamp 234. The front upper clamp 231, the front lower clamp 232, the rear upper clamp 233 and the rear lower clamp 234 all extend in the left-right direction. The front upper clamp 231 and the front lower clamp 232 are arranged at intervals in the upper and lower directions, and the rear upper clamp 233 and the rear lower clamp 234 are also arranged at intervals in the upper and lower directions. The front upper clamp 231 and the rear upper clamp 233 are arranged at intervals in the upper and lower directions, and the front upper clamp 231 and the rear upper clamp 233 are connected by bolts and nuts, the front lower clamp 232 and the rear lower clamp 234 are also arranged at intervals in the upper and lower directions, and the front lower clamp 232 and the rear lower clamp 234 are also connected by bolts and nuts.
[0047] like Figure 6 and Figure 8 As shown, the transformer body 2 contains three cores 22 arranged in sequence from left to right. The upper parts of the three cores 22 are clamped and fixed between the front upper clamp bar 231 and the rear upper clamp bar 233. The front upper clamp bar 231 and the rear upper clamp bar 233 provide front-to-back clamping force for the three cores 22. The lower parts of the three cores 22 are clamped and fixed between the front lower clamp bar 232 and the rear lower clamp bar 234. The front lower clamp bar 232 and the rear lower clamp bar 234 also provide front-to-back clamping force for the three cores 22. The upper end surface of the core 22, the upper end surface of the front upper clamp bar 231 and the upper end surface of the rear upper clamp bar 233 are flush, and the pressure plate 21 can provide downward pressure to the cores 22 on the left and the cores 22 on the right. This ensures that the core 22 will not deform during use and improves the short-circuit resistance.
[0048] The pressure plate 21 is located above the clamp 23, and the front end of the left front support plate 212, the front end of the right front support plate 213, the rear end of the left rear support plate 214 and the rear end of the right rear support plate 215 are all provided with mounting through holes. The front end of the left front support plate 212 is connected and fixed to the front upper clamping strip 231 by bolts and nuts, the front end of the right front support plate 213 is also connected and fixed to the front upper clamping strip 231 by bolts and nuts, the rear end of the left rear support plate 214 is also connected and fixed to the rear upper clamping strip 233 by bolts and nuts, and the rear end of the right rear support plate 215 is also connected and fixed to the rear upper clamping strip 233 by bolts and nuts.
[0049] like Figure 6As shown, the oil-immersed transformer also includes two spacers 24 arranged at intervals on the left and right sides, and the spacers 24 are in a strip-shaped structure, and the spacers 24 extend in the front-back direction. The material of the spacers 24 can be metal material or insulating material, for example, the spacers 24 can be iron blocks, wooden blocks or insulating material blocks. In the up-down direction, the spacer 24 on the left side is located between the left front support plate 212 and the front upper clamping strip 231, and the spacer 24 on the left side is also located between the left rear support plate 214 and the rear upper clamping strip 233. The upper end of the iron core 22 on the left side abuts against the spacer 24 on the left side, and the spacer 24 on the right side is located between the right front support plate 213 and the front upper clamping strip 231. The spacer 24 on the right side is also located between the right rear support plate 215 and the rear upper clamping strip 233, and the upper end of the iron core 22 on the right side abuts against the spacer 24 on the right side.
[0050] like Figure 6 As shown, the oil-immersed transformer also includes two insulating plates 25 spaced apart from each other. The insulating plates 25 are in a strip-shaped structure. The insulating plates 25 extend in the front-to-back direction and are in a horizontal state. The insulating plate 25 on the left is located between the left front support plate 212 and the pad 24 on the left. The insulating plate 25 on the left is also located between the left rear support plate 214 and the pad 24 on the left. The insulating plate 25 on the right is located between the right front support plate 213 and the pad 24 on the right. The insulating plate 25 on the right is also located between the right rear support plate 215 and the pad 24 on the right. The insulating plate 25 plays a role in strengthening insulation, and the pressing plate 21 plays a role in pressing. The pressing plate 21 sequentially exerts downward pressure on the iron core 22 on the left and the iron core 22 on the right through the insulating plate 25 and the pad 24.
[0051] like Figure 4 , Figure 5 and Fig.10 As shown, in order to improve the deformation resistance of the oil tank 1, the inner surfaces of the two long side walls 111 and the inner surfaces of the two short side walls 112 are stacked and fixedly connected with reinforcing plates 14, and the reinforcing plates 14 are welded and fixed to the side peripheral walls 11. Vertical angle steels 15 are provided at the four inner corners of the side peripheral walls 11. The reinforcing plates 14 are located between the vertical angle steels 15 and the side peripheral walls 11. A plurality of oil through holes 141 are provided on the reinforcing plates 14. The oil through holes 141 are circular, and the plurality of oil through holes 141 are arranged in regular rows and columns.
[0052] The outer sides of the two long side walls 111 and the two short side walls 112 are connected with corrugated plate groups 3, and there are four corrugated plate groups 3 in total. Each corrugated plate group 3 contains multiple heat dissipation corrugated plates. In order to improve the anti-deformation ability of the fuel tank 1, a reinforcing rod 4 is connected between two adjacent corrugated plate groups 3. In one corrugated plate group 3, the upper and lower ends of the multiple heat dissipation corrugated plates are also connected with reinforcing rods 4, and the reinforcing rods 4 are fully welded to the multiple heat dissipation corrugated plates. In addition, two adjacent reinforcing rods 4 are fully welded.
[0053] The above is only a specific embodiment of the utility model, and it cannot be used to limit the scope of the utility model. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the utility model should still fall within the scope of the utility model. In addition, the technical features of the utility model can be freely combined with each other, with technical features and technical solutions, with technical solutions and with embodiments.
Claims
1. An oil-immersed transformer, comprising an oil tank (1) and a transformer body (2), wherein the transformer body (2) is located inside the oil tank (1), and the oil tank (1) comprises a side wall (11) and a bottom wall (12), characterized in that: A connecting plate (13) is fixed on the inner surface of the side peripheral wall (11) of the oil tank (1). The transformer body (2) comprises a pressing plate (21) and an iron core (22). The pressing plate (21) is fixed above the iron core (22). The pressing plate (21) is connected and fixed to the connecting plate (13).
2. The oil-immersed transformer according to claim 1, characterized in that: The side peripheral wall (11) comprises two long side walls (111) arranged front and rear and two short side walls (112) arranged left and right. The connecting plate (13) is located on the upper part of the two short side walls (112). The connecting plate (13) is in a horizontal state. The left and right ends of the pressing plate (21) are respectively connected and fixed to the two connecting plates (13).
3. The oil-immersed transformer according to claim 2, characterized in that: The pressing plate (21) comprises a main body plate (211) which is in a long strip structure and extends in the left-right direction. The front side of the main body plate (211) is connected to a left front support plate (212) and a right front support plate (213) which are arranged at intervals on the left and right sides, and the rear side of the main body plate (211) is connected to a left rear support plate (214) and a right rear support plate (215) which are arranged at intervals on the left and right sides.
4. The oil-immersed transformer according to claim 3, characterized in that: The connecting plate (13) is parallel to the horizontal plane, the left front supporting plate (212) and the right front supporting plate (213) are symmetrical and mirror images of each other, the left rear supporting plate (214) and the right rear supporting plate (215) are symmetrical and mirror images of each other, the left front supporting plate (212) and the left rear supporting plate (214) are symmetrical and mirror images of each other, the right front supporting plate (213) and the right rear supporting plate (215) are symmetrical and mirror images of each other, and there is a gap between the left end of the main plate (211) and the left front supporting plate (212).
5. The oil-immersed transformer according to claim 3, characterized in that: The left end of the main body plate (211) is connected and fixed to the left connecting plate (13) by bolts and nuts, and the right end of the main body plate (211) is also connected and fixed to the right connecting plate (13) by bolts and nuts.
6. The oil-immersed transformer according to claim 3, characterized in that: The transformer body (2) further comprises a clamp (23), the clamp (23) comprising a front upper clamp bar (231), a front lower clamp bar (232), a rear upper clamp bar (233) and a rear lower clamp bar (234); the upper parts of a plurality of iron cores (22) are clamped and fixed between the front upper clamp bar (231) and the rear upper clamp bar (233); the upper end surfaces of the iron cores (22), the upper end surfaces of the front upper clamp bar (231) and the upper end surfaces of the rear upper clamp bar (233) are flush; and the lower parts of the plurality of iron cores (22) are clamped and fixed between the front lower clamp bar (232) and the rear lower clamp bar (234).
7. The oil-immersed transformer according to claim 6, characterized in that: The front end of the left front support plate (212) is connected and fixed to the front upper clamping strip (231) by means of bolts and nuts, the front end of the right front support plate (213) is also connected and fixed to the front upper clamping strip (231) by means of bolts and nuts, the rear end of the left rear support plate (214) is also connected and fixed to the rear upper clamping strip (233) by means of bolts and nuts, and the rear end of the right rear support plate (215) is also connected and fixed to the rear upper clamping strip (233) by means of bolts and nuts.
8. The oil-immersed transformer according to claim 7, characterized in that: The oil-immersed transformer further comprises two pads (24) arranged at intervals on the left and right, the pads (24) being in a strip-shaped structure and extending in the front-rear direction, the transformer body (2) comprising three iron cores (22) arranged in sequence from left to right, the pad (24) on the left side being located between the left front support plate (212) and the front upper clamping strip (231), the pad (24) on the left side being also located between the left rear support plate (214) and the rear upper clamping strip (233), the upper end of the iron core (22) on the left side being in contact with the pad (24) on the left side, the pad (24) on the right side being located between the right front support plate (213) and the front upper clamping strip (231), the pad (24) on the right side being also located between the right rear support plate (215) and the rear upper clamping strip (233), the upper end of the iron core (22) on the right side being in contact with the pad (24) on the right side.
9. The oil-immersed transformer according to claim 8, characterized in that: The oil-immersed transformer further comprises two insulating plates (25) arranged at intervals on the left and the right, wherein the insulating plate (25) on the left is located between the left front support plate (212) and the cushion block (24) on the left, and the insulating plate (25) on the left is also located between the left rear support plate (214) and the cushion block (24) on the left, and the insulating plate (25) on the right is located between the right front support plate (213) and the cushion block (24) on the right, and the insulating plate (25) on the right is also located between the right rear support plate (215) and the cushion block (24) on the right.
10. The oil-immersed transformer according to claim 2, characterized in that: The inner surfaces of the two long side walls (111) and the inner surfaces of the two short side walls (112) are both laminated and fixedly connected with a reinforcing plate (14), and a plurality of oil-passing through holes (141) are provided on the reinforcing plate (14), the oil-passing through holes (141) are circular, and the plurality of oil-passing through holes (141) are regularly arranged in rows and columns.