A high-efficiency magnetic shielding transformer oil tank

Abstract

The utility model provides a high -efficient magnetic shielding transformer oil tank relates to transformer oil tank field, including the oil tank body, be equipped with shielding mechanism in the oil tank body, shielding mechanism includes: bottom shielding unit, bottom shielding unit includes shielding bottom groove, shielding bottom groove places in the inboard bottom of oil tank body, and the distance exists between the outside wall of shielding bottom groove and the inboard wall of oil tank body, side wall shielding unit, a plurality of side wall shielding units are arranged at intervals along the inboard wall of oil tank body, and the side wall shielding unit includes fixed strip and shielding strip, and the fixed strip is connected with the inboard wall of oil tank body, and the shielding strip is detachably connected with the fixed strip, and the utility model can form shielding mechanism in the inboard of oil tank body, improves shielding effect, and at the same time, will not influence the heat dissipation effect of oil tank body.

Description

Technical Field

[0001] This application relates to the field of transformer oil tanks, specifically to a high-efficiency magnetically shielded transformer oil tank. Background Technology

[0002] Oil-immersed transformers are crucial equipment in power system operation, and the ability of the various structural components within the transformer to maintain a constant temperature within a certain range is an important indicator of its normal operation. However, large transformers often suffer from severe end-winding magnetic leakage. This lateral magnetic leakage at the winding ends leads to increased eddy current losses in the winding coils and higher hot spot temperatures, which in turn causes the temperature of the transformer tank or other structural components to rise.

[0003] Chinese patent document CN220691857U discloses a magnetic shielding device for transformer tanks, specifically disclosing the main body of the transformer tank. The main body has an installation slot on its outer side, an installation base plate at its bottom, and a magnetic shielding mechanism on its surface. The inner wall of the magnetic shielding mechanism has limiting components. The magnetic shielding mechanism includes a first shielding plate, a second shielding plate, and a first protective shielding plate. A connecting component is provided between the first and second shielding plates, and an outer frame is provided on the first protective shielding plate. This patent, through the use of the installation slot, magnetic shielding mechanism, limiting components, first shielding plate, second shielding plate, first protective shielding plate, and buffer spring, makes the overall shielding mechanism easier to install, eliminating the need for additional fixing components. It ensures the magnetic shielding effect of the transformer equipment while also mitigating external forces.

[0004] The aforementioned patent still has certain shortcomings. For example, the shielding structure in the aforementioned patent is installed on the outside of the transformer tank, which can only protect the equipment on the outside of the transformer tank, but cannot protect the transformer tank itself. Utility Model Content

[0005] In order to overcome the problem that the magnetic shielding structure in the prior art can only shield the leakage magnetic flux on the outside of the transformer tank, which can easily lead to abnormalities in the internal components of the transformer tank, this application provides a high-efficiency magnetically shielded transformer tank.

[0006] This application adopts the following technical solution: a high-efficiency magnetically shielded transformer tank, including a tank body, wherein a shielding mechanism is provided inside the tank body, the shielding mechanism including: a bottom shielding unit, the bottom shielding unit including a shielding bottom groove, the shielding bottom groove being placed on the inner bottom of the tank body, and a distance existing between the outer side wall of the shielding bottom groove and the inner side wall of the tank body; a side wall shielding unit, a plurality of the side wall shielding units being spaced apart along the inner side wall of the tank body, the side wall shielding unit including a fixing strip and a shielding strip, the fixing strip being connected to the inner side wall of the tank body, and the shielding strip being detachably connected to the fixing strip.

[0007] Optionally, the fixing strip extends along the height direction of the fuel tank body, one side of the fixing strip is connected to the fuel tank body, and the other side of the fixing strip is provided with a slot, the slot being dovetail-shaped; the shielding strip is provided with a connecting strip on the side facing the fixing strip, one side of the connecting strip is connected to the shielding strip, and the other side of the connecting strip is adapted to be inserted into the slot.

[0008] Optionally, the upper end of the shielding strip is flush with the top of the inner wall of the fuel tank body, and the lower end of the shielding strip extends to the inner side of the shielding groove.

[0009] Optionally, two adjacent connecting strips have a thickness difference, and two adjacent shielding strips are staggered in the horizontal direction; two connecting strips that are spaced apart have the same thickness, and two shielding strips that are spaced apart are flush in the horizontal direction.

[0010] Optionally, the outer wall of the fuel tank body is provided with a plurality of heat dissipation fins, and the heat dissipation fins are provided with cavities, which are connected to the fuel tank body; there is a flow channel between two adjacent shielding strips, and the oil in the fuel tank body flows between the cavity and the fuel tank body through the flow channel.

[0011] Optionally, a plurality of support protrusions are provided on the inner wall of the shielding strip near the inner wall of the fuel tank body and on the outer wall of the shielding strip away from the inner wall of the fuel tank body. The plurality of support protrusions are all located within the flow guiding channel. The plurality of support protrusions are spaced apart along the height direction of the shielding strip. The plurality of support protrusions are used to support two adjacent shielding strips.

[0012] Optionally, the edge of the fuel tank body is provided with a curved shielding plate, the curved shielding plate is attached to the inner sidewall of the fuel tank body, and both sides of the curved shielding plate are located inside the shielding strip.

[0013] Compared with the prior art, this application has the following beneficial effects:

[0014] 1. By using the bottom shielding unit, side wall shielding unit and corner shielding plate, a shielding mechanism is formed that can completely cover the inner side wall of the tank body, effectively reducing the impact of lateral leakage magnetic flux at the winding end on the tank body and internal structure.

[0015] 2. By alternately setting connecting strips of different thicknesses, the staggered setting between two adjacent shielding strips is achieved, thereby forming a flow channel between two adjacent shielding strips. While achieving the shielding effect on leakage magnetic flux, the cavity of the heat dissipation fins is connected to the inner space of the oil tank body, ensuring that the oil can reliably convect and dissipate heat. Attached Figure Description

[0016] Figure 1 This is an illustrative three-dimensional representation of the present application. Figure 1 ;

[0017] Figure 2 This is an illustrative three-dimensional representation of the present application. Figure 2 ;

[0018] Figure 3 It is a schematic 3D diagram of the shielding mechanism;

[0019] Figure 4 This is a reference diagram showing the assembly state of the heat sink fins and the sidewall shielding unit;

[0020] Figure 5 This is a schematic 3D view of the sidewall shielding unit;

[0021] In the diagram: 1. Fuel tank body; 11. Heat dissipation fins; 110. Cavity; 12. Airflow channel;

[0022] 2. Shielding mechanism; 21. Bottom shielding unit; 22. Side wall shielding unit; 221. Fixing strip; 2210. Slot; 222. Shielding strip; 2220. Supporting protrusion; 223. Connecting strip; 23. Corner shielding plate. Detailed Implementation

[0023] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] like Figure 1-5 As shown, a high-efficiency magnetically shielded transformer tank includes a tank body 1 and a shielding mechanism 2. The shielding mechanism 2 is disposed inside the tank body 1, which can effectively shield leakage flux, reduce the impact of leakage flux on the tank body 1 and its internal structure, and improve the magnetic shielding performance of the tank body 1.

[0025] The shielding mechanism 2 includes a bottom shielding unit 21 and side wall shielding units 22. The bottom shielding unit 21 includes a shielding groove, which is placed at the inner bottom of the fuel tank body 1. There is a certain distance between the outer wall of the shielding groove and the inner wall of the fuel tank body 1; this arrangement prevents direct contact between the shielding groove and the inner wall of the fuel tank body 1. Several side wall shielding units 22 are arranged at intervals along the inner wall of the fuel tank body 1. Each side wall shielding unit 22 includes a fixing strip 221 and a shielding strip 222. The fixing strip 221 is connected to the inner wall of the fuel tank body 1, serving to fix the shielding strip 222. The fixing strip 221 extends along the height of the fuel tank body 1. One side of the fixing strip 221 is fixed to the fuel tank body 1 by welding, bolting, or other methods. The other side of the fixing strip 221 has a slot 2210, which is dovetail-shaped. The dovetail-shaped slot 2210 design makes the connection between the shielding strip 222 and the fixing strip 221 more secure, preventing the shielding strip 222 from falling off during use. A connecting strip 223 is provided on the side of the shielding strip 222 facing the fixing strip 221. One side of the connecting strip 223 is connected to the shielding strip 222, and the other side is fitted into the slot 2210. The combination between the fixing strip 221 and the shielding strip 222 is completed by the insertion of the connecting strip 223 into the slot 2210, thus realizing the detachable installation of the shielding strip 222 on the inner sidewall of the fuel tank body 1. At the same time, multiple sidewall shielding units 22 are spaced apart on the inner sidewall of the fuel tank body 1, which can form a continuous magnetic shielding layer on the sidewall of the fuel tank body 1, effectively blocking lateral magnetic leakage.

[0026] Furthermore, the connecting strip 223 has two sizes: one is a thicker connecting strip 223 and the other is a thinner connecting strip 223. These two types of connecting strips 223 are arranged alternately. At the same time, the fixing strip 221 and the shielding strip 222 are the same size. This means that after the two types of connecting strips 223 are inserted into the slot 2210 of the fixing strip 221 in sequence and at intervals, the two adjacent shielding strips 222 are staggered in the horizontal direction. That is, the shielding strip 222 connected to the fixing strip 221 by the thicker connecting strip 223 is farther away from the inner wall of the fuel tank body 1, while the shielding strip 222 connected to the fixing strip 221 by the thinner connecting strip 223 is closer to the inner wall of the fuel tank body 1. Furthermore, the distance between two shielding strips 222 connected by connecting strips 223 of the same thickness is less than the width of the shielding strip 222 itself. In this way, when all the shielding strips 222 are installed, several shielding strips 222 will cover the inner wall of the corresponding oil tank body 1, ensuring that no magnetic flux leakage will pass through. At the same time, there is a flow channel 12 between the two staggered shielding strips 222. Through the setting of the flow channel 12, the oil can flow freely in the oil tank body 1 and will not be separated by the shielding mechanism 2.

[0027] The outer wall of the oil tank body 1 is provided with several heat dissipation fins 11, and each heat dissipation fin 11 has a cavity 110 that communicates with the oil tank body 1. A fixing strip 221 is set on the outer side of the connection between the cavity 110 and the oil tank body 1. The oil in the oil tank body 1 can flow between the cavity 110 and the oil tank body 1 through the flow channel 12. In this way, the oil located in the middle of the inner side of the oil tank body 1 can transfer heat to the heat dissipation fins 11 through natural convection or thermal radiation, and then radiate outward through the heat dissipation fins 11. The hot oil in the oil tank body 1 enters the cavity 110 of the heat dissipation fins 11 through the flow channel 12, dissipates heat at the heat dissipation fins 11, and then flows back to the oil tank body 1, forming a circulating heat dissipation system. This can effectively reduce the temperature inside the oil tank body 1 and ensure the normal operation of the transformer.

[0028] Several support protrusions 2220 are provided on the inner wall of the shielding strip 222 near the inner wall of the oil tank body 1 and on the outer wall of the shielding strip 222 away from the inner wall of the oil tank body 1. That is, several support protrusions 2220 are provided on the inner side of the shielding strip 222 connected to the thicker connecting strip 223, and several support protrusions 2220 are provided on the outer side of the shielding strip 222 connected to the thinner connecting strip 223. At the same time, the several support protrusions 2220 are all located in the flow channel 12 and are spaced apart along the height direction of the shielding strip 222. In this way, the several support protrusions 2220 can play a supporting role for two adjacent shielding strips 222, preventing the shielding strips 222 from deforming or squeezing each other under the action of oil flow, which would affect the flow of oil and the magnetic shielding effect.

[0029] A curved shielding plate 23 is provided at the edge of the fuel tank body 1. The curved shielding plate 23 is attached to the inner wall of the fuel tank body 1, and both sides of the curved shielding plate 23 are located inside the shielding strip 222. The function of the curved shielding plate 23 is to provide magnetic shielding for the edge of the fuel tank body 1, preventing the shielding strip 222 from failing to completely cover the inner wall of the fuel tank body 1, and effectively blocking the leakage of magnetic field from the edge. The curved shielding plate 23, together with the bottom shielding unit 21 and the side wall shielding unit 22, constitute a complete magnetic shielding system, improving the overall magnetic shielding performance of the fuel tank.

[0030] The implementation principle of this embodiment is as follows: By setting a shielding mechanism 2 inside the oil tank body 1, including a bottom shielding unit 21 and a side wall shielding unit 22, and setting a curved shielding plate 23 at the edge of the oil tank body 1, a comprehensive magnetic shielding system is formed, which effectively reduces the impact of lateral leakage magnetic flux at the winding end on the oil tank body 1 and its internal structure, and reduces eddy current losses and hot spot temperatures. At the same time, the flow channel 12 between the heat dissipation fins 11 on the outer wall of the oil tank body 1 and the shielding strip 222 constitutes a heat dissipation system, ensuring the stability of the oil temperature inside the oil tank body 1.

[0031] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A high-efficiency magnetically shielded transformer tank, comprising a tank body (1), characterized in that, The fuel tank body (1) is provided with a shielding mechanism (2), the shielding mechanism (2) comprising: Bottom shielding unit (21), the bottom shielding unit (21) includes a shielding bottom groove, the shielding bottom groove is placed on the inner bottom of the fuel tank body (1), and there is a distance between the outer side wall of the shielding bottom groove and the inner side wall of the fuel tank body (1); Side wall shielding unit (22): A plurality of side wall shielding units (22) are spaced apart along the inner side wall of the fuel tank body (1). The side wall shielding unit (22) includes a fixing strip (221) and a shielding strip (222). The fixing strip (221) is connected to the inner side wall of the fuel tank body (1), and the shielding strip (222) is detachably connected to the fixing strip (221).

2. The high-efficiency magnetically shielded transformer tank according to claim 1, characterized in that, The fixing strip (221) extends along the height direction of the oil tank body (1), one side of the fixing strip (221) is connected to the oil tank body (1), and the other side of the fixing strip (221) is provided with a slot (2210), which is dovetail-shaped. The shielding strip (222) has a connecting strip (223) on one side facing the fixing strip (221). One side of the connecting strip (223) is connected to the shielding strip (222), and the other side of the connecting strip (223) is adapted to be inserted into the slot (2210).

3. The high-efficiency magnetically shielded transformer oil tank according to claim 2, characterized in that, The upper end of the shielding strip (222) is flush with the top of the inner wall of the oil tank body (1), and the lower end of the shielding strip (222) extends to the inner side of the shielding bottom groove.

4. The high-efficiency magnetically shielded transformer tank according to claim 2, characterized in that, There is a thickness difference between two adjacent connecting strips (223), and two adjacent shielding strips (222) are staggered in the horizontal direction; The two connecting strips (223) spaced apart have the same thickness, and the two shielding strips (222) spaced apart are flush in the horizontal direction.

5. The high-efficiency magnetically shielded transformer tank according to claim 4, characterized in that, The outer wall of the oil tank body (1) is provided with a plurality of heat dissipation fins (11), and the heat dissipation fins (11) are provided with cavities (110), and the cavities (110) are connected to the oil tank body (1). There is a flow channel (12) between two adjacent shielding strips (222), and the oil in the tank body (1) flows between the cavity (110) and the tank body (1) through the flow channel (12).

6. The high-efficiency magnetically shielded transformer tank according to claim 5, characterized in that, A plurality of support protrusions (2220) are provided on the inner wall of the shielding strip (222) near the inner wall of the tank body (1) and on the outer wall of the shielding strip (222) away from the inner wall of the tank body (1). The plurality of support protrusions (2220) are all located in the flow guiding channel (12). The plurality of support protrusions (2220) are spaced apart along the height direction of the shielding strip (222). The plurality of support protrusions (2220) are used to support two adjacent shielding strips (222).

7. The high-efficiency magnetically shielded transformer tank according to claim 5, characterized in that, The oil tank body (1) is provided with a curved shielding plate (23) at its edge. The curved shielding plate (23) is attached to the inner wall of the oil tank body (1). Both sides of the curved shielding plate (23) are located inside the shielding strip (222).

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