A transformer oil tank and oil-immersed transformer

Abstract

The application discloses a transformer oil tank and an oil-immersed transformer, which comprise an oil tank body and a sheet-type radiator. The sheet-type radiator comprises a first radiating group, an upper oil collecting pipe and a lower oil collecting pipe. The first radiating group is provided with a plurality of first radiating fins which are arranged in sequence and at intervals along a first direction. The upper oil collecting pipe comprises a first converging main line and a first oil inlet connecting pipeline. The lower oil collecting pipe comprises a second converging main line and a first oil outlet connecting pipeline. Oil liquid flows into the first converging main line through the first oil inlet connecting pipeline at both ends of the first converging main line, thereby effectively compensating the oil amount at a position far from the liquid inlet on the first converging main line. The uniformity of the oil amount distributed in each first radiating fin of the first radiating group is improved. Meanwhile, the difference in the distance between each first radiating fin and the outer tank wall of the transformer oil tank is relatively small, thereby improving the consistency of the radiating effect and capacity of each first radiating fin. Finally, the radiating capacity of each first radiating fin of the sheet-type radiator is homogenized.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more specifically, to a transformer tank and an oil-immersed transformer. Background Technology

[0002] During operation, oil-immersed transformers generate a significant amount of heat in their windings and core. To ensure normal operation and extend the insulation life of the transformer, an effective cooling system is essential to dissipate this heat promptly. In related technologies, oil-immersed transformers commonly employ multiple sets of detachable plate-type radiators (commonly known as "plate radiators") connected around the transformer tank, with heat dissipation achieved through the circulation of transformer oil within the plate radiators.

[0003] However, the plate-type radiators installed on the outside of the transformer tank in the relevant technology have a significant inherent defect: the heat dissipation efficiency between each heat sink is uneven, resulting in poor overall heat dissipation effect.

[0004] In summary, how to improve the heat dissipation effect of the plate radiator installed on the outside of the transformer tank has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, this application provides a transformer oil tank and an oil-immersed transformer to improve the heat dissipation effect of the plate radiator installed on the outside of the transformer oil tank.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A transformer oil tank includes a tank body and a plate-type radiator disposed on at least one outer wall of the tank body, the plate-type radiator comprising:

[0008] The first heat dissipation array has a plurality of first heat dissipation fins arranged at intervals along a first direction;

[0009] The upper oil collection pipe includes a first main confluence and a first oil inlet connection pipe disposed at both ends of the first main confluence. The first main confluence is integrated at one end of the first heat dissipation array along the second direction. The first main confluence extends along the first direction and communicates with each of the first heat dissipation fins. The first oil inlet connection pipe communicates with the top inner cavity of the oil tank body.

[0010] The lower oil collection pipe includes a second main confluence and a first oil outlet connection pipe disposed at both ends of the second main confluence. The second main confluence is integrated at the other end of the first heat dissipation array along the second direction, and the second main confluence extends along the first direction and communicates with each of the first heat dissipation fins. The first oil outlet connection pipe communicates with the bottom inner cavity of the oil tank body.

[0011] Wherein, the first direction is the direction perpendicular to the second direction and extending along the outer wall of the fuel tank body on the side where the first heat dissipation array is located; the second direction is the height direction of the fuel tank body.

[0012] In some embodiments, the first oil inlet connecting pipes at both ends of the first main confluence are respectively connected to two opposite side walls of the oil tank body along the first direction;

[0013] And / or, the first oil outlet connection pipes at both ends of the second main confluence are respectively connected to two opposite side walls of the oil tank body along the first direction.

[0014] In some embodiments, the first oil inlet connecting pipes at both ends of the first main busbar are respectively connected to the outer wall of the oil tank body on the side where the first heat dissipation array is located.

[0015] And / or, the first oil outlet connecting pipes at both ends of the second main busbar are respectively connected to the outer wall of the oil tank body on the side where the first heat dissipation array is located.

[0016] In some embodiments, the plate radiator includes at least one second oil inlet connection pipe, one end of which is connected to the first main conduit, and the other end is connected to the top inner cavity of the oil tank body.

[0017] In some embodiments, there are multiple second oil inlet connection pipes, which are arranged sequentially at intervals along the first direction.

[0018] In some embodiments, the plate radiator includes at least one second oil outlet connection pipe, one end of which is connected to the second main confluence, and the other end is connected to the bottom inner cavity of the oil tank body.

[0019] In some embodiments, there are multiple second oil outlet connection pipes, which are arranged sequentially at intervals along the first direction.

[0020] In some embodiments, the first heat sink is arranged perpendicular to the outer wall of the oil tank body on the side where it is located.

[0021] In some embodiments, the plate heat sink further includes a second heat sink row, the second heat sink row having a plurality of second heat sinks arranged at intervals along a third direction;

[0022] Wherein, the first oil inlet connection pipe is integrated at one end of the second heat dissipation assembly along the second direction, and extends along the third direction and communicates with each of the second heat dissipation fins; the first oil outlet connection pipe is integrated at the other end of the second heat dissipation assembly along the second direction, and extends along the third direction and communicates with each of the second heat dissipation fins.

[0023] The third direction is the direction perpendicular to the plane of the outer wall of the oil tank body on the side where the first heat dissipation array is located.

[0024] To improve the heat dissipation effect of the plate-type radiator installed on the outside of the transformer tank, the transformer tank provided in this application includes a tank body and a plate-type radiator installed on at least one outer wall of the tank body. The plate-type radiator specifically includes a first heat dissipation array, an upper oil collection pipe, and a lower oil collection pipe. In actual application, the oil in the tank body exchanges heat with the heat-generating components (mainly the transformer body) inside the tank body. The oil is heated and rises due to its decreased density. At that time, the top inner cavity of the tank body will be filled with oil through the first oil inlet. The connecting pipe enters the first main flow path, and then from the first main flow path into each of the first heat sinks of the first heat sink assembly. Under the action of gravity, the oil will collect in the second main flow path at the bottom of the first heat sink assembly, and finally return to the bottom inner cavity of the oil tank body through the first oil outlet connecting pipe. This allows the oil to circulate through the first heat sink assembly and the inner cavity of the oil tank body, forming a natural circulation relying on the thermosiphon effect. During this circulation, the heat exchange between each of the first heat sinks of the first heat sink assembly and the external airflow is utilized to dissipate heat from the oil in the oil tank body. In this configuration, since both the first and second main ducts extend along a first direction, which is perpendicular to the second direction and extends along the outer wall of the tank body on the side where the first heat dissipation array is located, and the second direction is the height direction of the tank body, oil flows into the first main duct through the first oil inlet connecting pipes at both ends of the first main duct. This effectively compensates for the amount of oil at positions far from the inlet on the first main duct, which helps to improve the uniformity of oil distribution in each of the first heat dissipation array fins. At the same time, since each of the first heat dissipation array fins is arranged sequentially and at intervals along the first direction, the difference in distance between each first heat dissipation array fin and the outer wall of the tank body is small, which helps to improve the consistency of the heat dissipation effect and capacity of each first heat dissipation array fin. Ultimately, this makes the heat dissipation capacity of each first heat dissipation array fin uniform, effectively improving the overall heat dissipation effect of the fin radiator.

[0025] On the other hand, this application also provides an oil-immersed transformer, including a transformer tank and a transformer body disposed within the transformer tank, wherein the transformer tank is the transformer tank described in any of the above-mentioned solutions. Since the aforementioned transformer tank has the above-mentioned technical effects, the oil-immersed transformer with this transformer tank should also have the corresponding technical effects, which will not be elaborated further here.

[0026] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A top-view structural schematic diagram of the first type of plate heat sink provided in the embodiments of this application when it is installed in a transformer oil tank;

[0029] Figure 2 A schematic diagram of the isometric structure of the first type of plate heat sink provided in the embodiment of this application when it is installed in a transformer oil tank from the bottom view.

[0030] Figure 3 A top-view structural schematic diagram of the second type of plate heat sink provided in the embodiments of this application, when it is installed in a transformer oil tank;

[0031] Figure 4 A top-view structural schematic diagram of the third type of plate heat sink provided in the embodiments of this application when it is installed in a transformer oil tank;

[0032] Figure 5 A schematic diagram of the isometric structure of the third type of plate heat sink provided in this application embodiment when it is installed in a transformer oil tank from the bottom view.

[0033] Figure 6 This is an isometric structural diagram of the plate-type heat sink provided in the embodiments of this application, which is installed on the four walls of the transformer tank from a top view.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Plate radiator;

[0036] 11-First heat dissipation array;

[0037] 110 - First heat sink;

[0038] 12-Upper section oil pipe;

[0039] 121 - First main merging road;

[0040] 122 - First oil inlet connection pipe;

[0041] 123 - Second oil inlet connection pipe;

[0042] 13-Lower oil collection pipe;

[0043] 131 - Second main merging road;

[0044] 132 - First oil outlet connection line;

[0045] 133 - Second oil outlet connection line;

[0046] 14 - Second heat dissipation unit;

[0047] 140 - Second heatsink;

[0048] 2-Fuel tank body. Detailed Implementation

[0049] The core of this application is to provide a transformer tank and an oil-immersed transformer to improve the heat dissipation effect of the plate radiator installed on the outside of the transformer tank.

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] During operation, oil-immersed transformers generate a significant amount of heat in their windings and core. To ensure normal operation and extend the insulation life of the transformer, an effective cooling system is essential to dissipate this heat promptly. Currently, medium to large-sized oil-immersed transformers commonly employ multiple sets of detachable plate-type radiators (commonly known as "plate radiators") connected around the transformer tank. Heat dissipation is achieved through the natural circulation of transformer oil within the radiator plates. This is a mature, reliable, and cost-effective cooling solution.

[0052] However, the plate-type radiators installed on the outside of the transformer tank have a significant inherent defect: uneven heat dissipation efficiency between the individual fins, resulting in poor overall heat dissipation.

[0053] Specifically, the connection method in related technologies is usually a "single-in, single-out" type, meaning that the upper and lower oil collection pipes are connected to the transformer tank only at one end. This structure leads to severely uneven oil flow distribution. During the natural circulation of the oil, the heat sink closest to the transformer tank inlet has the lowest flow resistance, the fastest oil flow rate, and the largest amount of oil flowing through it; while the heat sink furthest away has the highest flow resistance, the slowest oil flow rate, and the smallest amount of oil flowing through it.

[0054] This creates a paradox: the radiators furthest from the transformer tank, theoretically having the lowest cooling air temperature and the greatest heat dissipation potential because the surrounding air temperature isn't heated by the upstream radiators, are precisely the areas with the lowest oil flow rate and the weakest heat carrying capacity, failing to fully utilize their superior heat dissipation potential. Conversely, while the radiators closer to the transformer tank receive a higher oil flow rate, their heat dissipation effect is affected by the hot air exhausted from the downstream radiators.

[0055] This imbalance, where "the cold doesn't flow, and the flowing doesn't cool," has the following adverse consequences:

[0056] Low overall heat dissipation efficiency: Some heat sinks are "idle" or inefficiently working, failing to fully utilize all heat dissipation areas, resulting in higher overall temperature rise of the transformer, or limiting the output capacity of the transformer with the same heat dissipation area.

[0057] Risk of localized overheating: Uneven oil flow distribution may create localized dead zones or low-speed zones inside the transformer tank, affecting the uniform cooling of the windings and core.

[0058] Waste of resources: In order to achieve the desired cooling effect, more heat sinks may be needed, which increases the material cost, size and weight of the transformer.

[0059] Based on this, one embodiment of this application provides a transformer oil tank to improve the heat dissipation effect of the plate radiator installed on the outside of the transformer oil tank.

[0060] Specifically, refer to Figure 1 As shown, the transformer tank provided in this embodiment includes a tank body 2 and a plate-type radiator 1 disposed on at least one outer wall of the tank body 2. The plate-type radiator 1 specifically includes a first heat dissipation array 11, an upper oil collecting pipe 12, and a lower oil collecting pipe 13.

[0061] The first heat dissipation array 11 has a plurality of first heat dissipation fins 110 arranged at intervals along a first direction. Each first heat dissipation fin 110 has a cavity for oil to flow through.

[0062] The upper oil pipe 12 includes a first main conduit 121 and two first oil inlet connecting pipes 122. The two first oil inlet connecting pipes 122 are respectively disposed at both ends of the first main conduit 121. The first main conduit 121 is integrated into one end of the first heat dissipation assembly 11 along the second direction. Here, "the first main conduit 121 is integrated into one end of the first heat dissipation assembly 11 along the second direction" can specifically mean that the first main conduit 121 is directly disposed on the top of the first heat dissipation fin 110 of the first heat dissipation assembly 11; or, a portion of the first main conduit 121 is embedded in the first heat dissipation fin 110 of the first heat dissipation assembly 11, for example, the top of the first heat dissipation assembly 11 has an embedding groove, and a portion of the first main conduit 121 is embedded in the embedding groove; or, the entire first main conduit 121 is embedded in the first heat dissipation fin 110 of the first heat dissipation assembly 11, for example, the first main conduit 121 passes through the first heat dissipation fin 110 of the first heat dissipation assembly 11. The first main busbar 121 is integrated into the first heat dissipation array 11, and the specific arrangement may be, but is not limited to, welding. The first main busbar 121 extends along the first direction and is connected to each of the first heat dissipation fins 110. The main functions of the first main busbar 121 include fixing and oil supply. The fixing function is mainly reflected in the fact that the first main busbar 121 is integrated into the first heat dissipation array 11 at one end along the second direction, which can connect and fix the first heat dissipation fins 110 at one end along the second direction. The oil supply function is mainly reflected in the fact that the first main busbar 121 extends along the first direction and is connected to each of the first heat dissipation fins 110, so that the oil flowing in the first main busbar 121 can be sent to each of the first heat dissipation fins 110. The first oil inlet connecting pipe 122 is connected to the top inner cavity of the oil tank body 2, so that the oil in the top inner cavity of the oil tank body 2 can be sent into the first main busbar 121. The first oil inlet connection pipe 122 and the first main confluence pipe 121 can be designed as a single pipe or as two independent pipes sealed together by welding or other methods. No further specific limitations are made here.

[0063] Reference Figure 1 Combination Figure 2The aforementioned lower oil collection pipe 13 includes a second main confluence 131 and two first oil outlet connecting pipes 132. The two first oil outlet connecting pipes 132 are respectively disposed at both ends of the second main confluence 131. The second main confluence 131 is integrated into the other end of the first heat dissipation assembly 11 along the second direction. Here, "the second main confluence 131 is integrated into the other end of the first heat dissipation assembly 11 along the second direction" can specifically mean that the second main confluence 131 is directly disposed at the bottom of the first heat dissipation fin 110 of the first heat dissipation assembly 11; or, a portion of the second main confluence 131 is embedded within the first heat dissipation fin 110 of the first heat dissipation assembly 11, for example, the top of the first heat dissipation assembly 11 has an embedding groove, and a portion of the second main confluence 131 is embedded in the embedding groove; or, the entire second main confluence 131 is embedded within the first heat dissipation fin 110 of the first heat dissipation assembly 11, for example, the second main confluence 131 penetrates through the first heat dissipation fin 110 of the first heat dissipation assembly 11. The second main busbar 131 is integrated into the first heat dissipation array 11. The specific arrangement of the second main busbar 131 can be, but is not limited to, welding. The second main busbar 131 extends along the first direction and is connected to each of the first heat dissipation fins 110. The main functions of the second main busbar 131 include fixing and oil collection. The fixing function is mainly reflected in the fact that the second main busbar 131 extends along the first direction and is connected to each of the first heat dissipation fins 110. The oil in each of the first heat dissipation fins 110 is collected into the second main busbar 131 under the action of gravity. The first oil outlet connection pipe 132 is connected to the bottom inner cavity of the oil tank body 2. The oil in the second main busbar 131 can be sent back to the bottom inner cavity of the oil tank body 2 through the first oil outlet connection pipe 132. The first oil outlet connection pipe 132 and the second main busbar 131 can be designed as a single pipe or as two independent pipes sealed together by welding or other methods. No further specific limitations are made here.

[0064] Furthermore, in this embodiment, the first direction is specifically a direction perpendicular to the second direction and extending along the outer wall of the fuel tank body 2 on the side where the first heat dissipation array 11 is located, and the second direction is the height direction of the fuel tank body 2. For example, referring to... Figure 1 and Figure 2 As shown, when the side where the first heat dissipation array 11 is located is on the length plane of the four sides of the fuel tank body 2, the first direction is specifically the length direction of the fuel tank body 2. Of course, when the side where the first heat dissipation array 11 is located is on the width plane of the four sides of the fuel tank body 2, the first direction can specifically be the width direction of the fuel tank body 2.

[0065] In practical applications, the oil in the transformer tank 2 exchanges heat with the heat-generating components (mainly the transformer body) inside the tank 2. The oil is heated and rises due to its decreased density. At that time, the oil in the top inner cavity of the tank 2 will enter the first main flow path 121 through the first oil inlet connection pipe 122, and then enter the first heat sinks 110 of the first heat dissipation array 11 through the first main flow path 121. Then, under the action of gravity, the oil will collect in the second main flow path 131 at the bottom of the first heat dissipation array 11, and finally return to the bottom inner cavity of the tank 2 through the first oil outlet connection pipe 132. This allows the oil to circulate through the first heat dissipation array 11 and the inner cavity of the tank 2, forming a natural circulation relying on the thermosiphon effect. During this circulation, the heat exchange between the first heat sinks 110 of the first heat dissipation array 11 and the external airflow is utilized to dissipate heat from the oil in the tank 2. Since both the first main flow path 121 and the second main flow path 131 extend along a first direction, which is perpendicular to the vertical direction and extends along the outer wall of the tank body 2 on the side where the first heat dissipation array 11 is located, and the second direction is the height direction of the tank body 2, oil flows into the first main flow path 121 through the first oil inlet connecting pipes 122 at both ends of the first main flow path 121. This effectively compensates for the amount of oil at positions far from the inlet on the first main flow path 121, which helps to improve the uniformity of oil distribution in each of the first heat dissipation fins 110 of the first heat dissipation array 11. At the same time, since each of the first heat dissipation fins 110 of the first heat dissipation array 11 is arranged sequentially and at intervals along the first direction, the difference in distance between each of the first heat dissipation fins 110 and the outer wall of the tank body 2 is small. This helps to improve the consistency of the heat dissipation effect and capacity of each of the first heat dissipation fins 110, and ultimately makes the heat dissipation capacity of each of the first heat dissipation fins 110 of the plate radiator 1 uniform, effectively improving the overall heat dissipation effect of the plate radiator 1.

[0066] In some specific implementation plans, refer to Figure 1 and Figure 2 As shown, the first oil inlet connecting pipes 122 at both ends of the aforementioned first main busbar 121 can be specifically designed to connect to two opposite side walls of the tank body 2 along the first direction. For example, when the first heat dissipation array 11 is designed on the length plane of the four sides of the tank body 2, the first oil inlet connecting pipes 122 can be bent and connected to the width plane of the four sides of the tank body 2. By designing this structure, the number of first heat dissipation fins 110 arranged in the first direction of the first heat dissipation array 11 can be effectively increased, because the first oil inlet connecting pipes 122 are bent and connected to two opposite side walls of the tank body 2 along the first direction, thus lengthening the first main busbar 121 along the first direction.

[0067] Similarly, the first oil outlet connecting pipes 132 at both ends of the second main busbar 131 can also be designed to connect to two opposite side walls of the tank body 2 along the first direction. For example, when the first heat dissipation array 11 is designed on the length plane of the four sides of the tank body 2, the first oil outlet connecting pipes 132 can be bent and connected to the width plane of the four sides of the tank body 2. By designing this structure, the number of first heat dissipation fins 110 arranged in the first direction of the first heat dissipation array 11 can be effectively increased, because the first oil outlet connecting pipes 132 are bent and connected to two opposite side walls of the tank body 2 along the first direction, thus lengthening the second main busbar 131 along the first direction.

[0068] If the first oil inlet connection pipe 122 at both ends of the first main confluence 121 is designed to be connected to two opposite side walls of the oil tank body 2 along the first direction, then this design is defined as Method 1; if the first oil outlet connection pipe 132 at both ends of the second main confluence 131 is designed to be connected to two opposite side walls of the oil tank body 2 along the first direction, then this design is defined as Method 2. Method 1 and Method 2 can coexist or one of them can be arranged.

[0069] For example, if the number of first heat dissipation fins 110 arranged in the first heat dissipation group 11 is large and exceeds the span of the fuel tank body 2 along the first direction, then it is chosen to design both method one and method two to coexist.

[0070] For example, the number of first heat dissipation fins 110 arranged in the first heat dissipation group 11 in the first direction is relatively small, and within the span of the oil tank body 2 along the first direction, it is possible to choose both method one and method two to coexist, or to choose to design it to have only method one or only method two.

[0071] It is worth mentioning that, referring to Figure 6 As shown, the first oil inlet connecting pipes 122 at both ends of the first main busbar 121 can be designed to connect to two opposite side walls of the oil tank body 2 along the first direction, or they can be designed to connect to the outer wall of the oil tank body 2 on the side where the first heat dissipation array 11 is located. Similarly, the first oil outlet connecting pipes 132 at both ends of the second main busbar 131 can be designed to connect to two opposite side walls of the oil tank body 2 along the first direction, or they can be designed to connect to the outer wall of the oil tank body 2 on the side where the first heat dissipation array 11 is located. In practical applications, the configuration can be selected according to actual needs, and no further specific limitations are made here.

[0072] In some specific implementation plans, refer to Figure 4 ,Should Figure 4 In order to be in Figure 1 Based on the existing design, a second oil inlet connection pipe 123 is added. Therefore, the aforementioned plate-type radiator 1 also includes at least one second oil inlet connection pipe 123. One end of this second oil inlet connection pipe 123 is connected to the first main conduit 121, and the other end is connected to the top inner cavity of the oil tank body 2. By designing the second oil inlet connection pipe 123, the oil intake of the first main conduit 121 can be increased, improving the heat dissipation effect.

[0073] Specifically, the number of second oil inlet connection pipes 123 can be one or more. When multiple pipes are designed, they are arranged sequentially and at intervals along the first direction to make the oil inlet volume of the first main confluence 121 more even along the first direction, improve the uniformity of heat dissipation, and make full use of the heat dissipation capacity of each first heat sink 110.

[0074] In some other specific implementation schemes, refer to Figure 5 As shown, Figure 5 In order to be in Figure 2 Based on the existing design, a second oil outlet connection pipe 133 is added. Therefore, the aforementioned plate-type radiator 1 also includes at least one second oil outlet connection pipe 133. One end of the second oil outlet connection pipe 133 is connected to the second main conduit 131, and the other end is connected to the bottom inner cavity of the oil tank body 2. By designing the second oil outlet connection pipe 133, the oil output of the second main conduit 131 can be increased, improving the heat dissipation effect.

[0075] Specifically, the number of second oil outlet connection pipes 133 can be designed as one or multiple. When multiple are designed, they are specifically designed to be arranged sequentially and at intervals along the first direction so that the oil output of the second main confluence 131 along the first direction is more evenly distributed, improving the uniformity of heat dissipation and making full use of the heat dissipation capacity of each first heat sink 110.

[0076] It is worth mentioning that the second oil inlet connection pipe 123 and the second oil outlet connection pipe 133 can be configured simultaneously or one of them can be configured. In actual application, the design can be selected according to actual needs, and no more specific restrictions are made here.

[0077] In some specific implementation plans, refer to Figure 1As shown, the first heat sink 110 and the outer wall of the oil tank body 2 on the same side can be designed to be arranged perpendicularly. Here, perpendicularity refers to perpendicularity within the allowable machining error range, specifically including absolute perpendicularity and approximate perpendicularity (such as 90°±5°). By designing this structural form, the heat dissipation airflow structure formed by the interval between each pair of adjacent first heat sinks 110 can all play a heat dissipation role on the outer wall of the oil tank body 2 on the same side, which helps to improve the overall heat dissipation effect.

[0078] It is understandable that the design of the first heat sink 110 and the outer wall of the oil tank body 2 on the same side being arranged vertically is merely an example of the embodiment of this application. In actual application, the first heat sink 110 and the outer wall of the oil tank body 2 on the same side can also be arranged at a certain angle. In actual application, the configuration can be selected according to actual needs, and no more specific limitations are made here.

[0079] In some other specific implementation schemes, refer to Figure 3 As shown, Figure 3 In order to be in Figure 1 Based on the above, a second heat dissipation array 14 is added. At that time, the above-mentioned plate heat sink 1 also includes a second heat dissipation array 14. The second heat dissipation array 14 has a plurality of second heat dissipation fins 140 arranged at intervals along a third direction. The second heat dissipation fins 140 have cavities for oil to flow through to achieve heat dissipation.

[0080] The first oil inlet connecting pipe 122 is integrated into one end of the second heat dissipation array 14 along the second direction and extends along the third direction, communicating with each of the second heat dissipation fins 140. Specifically, "the first oil inlet connecting pipe 122 is integrated into one end of the second heat dissipation array 14 along the second direction" can mean that the first oil inlet connecting pipe 122 is directly disposed on the top of the second heat dissipation fins 140 of the second heat dissipation array 14; or, a portion of the first oil inlet connecting pipe 122 is embedded within the second heat dissipation fins 140 of the second heat dissipation array 14, for example, the top of the second heat dissipation array 14 has an embedding groove, and a portion of the first oil inlet connecting pipe 122 is embedded within this embedding groove; or, the entire first oil inlet connecting pipe 122 is embedded within the second heat dissipation fins 140 of the second heat dissipation array 14, for example, the first oil inlet connecting pipe 122 penetrates through the second heat dissipation fins 140 of the second heat dissipation array 14. The specific arrangement of the first oil inlet connecting pipe 122 integrated into the second heat dissipation array 14 can be, but is not limited to, welding.

[0081] The first oil outlet connecting pipe 132 is integrated into the other end of the second heat dissipation array 14 along the second direction, and extends along the third direction and communicates with each of the second heat sinks 140. Specifically, "the first oil outlet connecting pipe 132 is integrated into the other end of the second heat dissipation array 14 along the second direction" can mean that the first oil outlet connecting pipe 132 is directly disposed at the bottom of the second heat sink 140 of the second heat dissipation array 14; or, a portion of the first oil outlet connecting pipe 132 is embedded within the second heat sink 140 of the second heat dissipation array 14, for example, a recess is formed at the bottom of the second heat dissipation array 14, and a portion of the first oil outlet connecting pipe 132 is embedded within this recess; or, the entire first oil outlet connecting pipe 132 is embedded within the second heat sink 140 of the second heat dissipation array 14, for example, the first oil outlet connecting pipe 132 penetrates through the second heat sink 140 of the second heat dissipation array 14. The specific method of integrating the first oil outlet connecting pipe 132 into the second heat dissipation array 14 can be, but is not limited to, welding.

[0082] Furthermore, in this embodiment, the third direction is the direction perpendicular to the plane of the outer wall of the oil tank body 2 on the side where the first heat dissipation array 11 is located. By designing this structural form, the number of heat dissipation fins of the plate heat sink 1 can be increased.

[0083] It is worth mentioning that the aforementioned first oil inlet connection pipe 122, second oil inlet connection pipe 123, first oil outlet connection pipe 132 and second oil outlet connection pipe 133 are connected to the outer wall of the oil tank body 2 in a manner that may be, but is not limited to, a flange connection.

[0084] On the other hand, this application also provides an oil-immersed transformer, including a transformer tank and a transformer body disposed within the transformer tank, wherein the transformer tank is the transformer tank described in any of the above-mentioned solutions. Since the aforementioned transformer tank has the above-mentioned technical effects, the oil-immersed transformer with this transformer tank should also have the corresponding technical effects, which will not be elaborated further here.

[0085] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0087] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0088] It should also be noted that in the description of the embodiments of this application, the terms "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0089] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A transformer tank, comprising a tank body (2) and a plate-type radiator (1) disposed on at least one outer wall of the tank body (2), characterized in that, The plate-type heat sink (1) includes: The first heat dissipation array (11) has a plurality of first heat dissipation fins (110) arranged sequentially at intervals along the first direction. The upper oil collection pipe (12) includes a first main confluence (121) and a first oil inlet connection pipe (122) disposed at both ends of the first main confluence (121). The first main confluence (121) is integrated at one end of the first heat dissipation array (11) along the second direction. The first main confluence (121) extends along the first direction and communicates with each of the first heat dissipation fins (110). The first oil inlet connection pipe (122) communicates with the top inner cavity of the oil tank body (2). The lower oil collection pipe (13) includes a second main confluence (131) and a first oil outlet connection pipe (132) disposed at both ends of the second main confluence (131). The second main confluence (131) is integrated at the other end of the first heat dissipation array (11) along the second direction, and the second main confluence (131) extends along the first direction and communicates with each of the first heat dissipation fins (110). The first oil outlet connection pipe (132) communicates with the bottom cavity of the oil tank body (2). Wherein, the first direction is the direction perpendicular to the second direction and extending along the outer wall of the tank body (2) on the side where the first heat dissipation array (11) is located; the second direction is the height direction of the tank body (2).

2. The transformer oil tank as described in claim 1, characterized in that, The first oil inlet connecting pipes (122) at both ends of the first main confluence (121) are respectively connected to two opposite side walls of the oil tank body (2) along the first direction; And / or, the first oil outlet connection pipes (132) at both ends of the second main confluence (131) are respectively connected to two opposite side walls of the oil tank body (2) along the first direction.

3. The transformer oil tank as described in claim 1, characterized in that, The first oil inlet connecting pipes (122) at both ends of the first main confluence (121) are respectively connected to the outer wall of the oil tank body (2) on the side where the first heat dissipation assembly (11) is located; And / or, the first oil outlet connection pipes (132) at both ends of the second main busbar (131) are respectively connected to the outer wall of the oil tank body (2) on the side where the first heat dissipation assembly (11) is located.

4. The transformer oil tank as described in claim 1, characterized in that, The plate-type radiator (1) includes at least one second oil inlet connection pipe (123), one end of which is connected to the first main confluence pipe (121), and the other end is connected to the top inner cavity of the oil tank body (2).

5. The transformer oil tank as described in claim 4, characterized in that, There are multiple second oil inlet connection pipes (123), which are arranged sequentially at intervals along the first direction.

6. The transformer oil tank as described in claim 1, characterized in that, The plate-type radiator (1) includes at least one second oil outlet connection pipe (133), one end of which is connected to the second main confluence pipe (131), and the other end is connected to the bottom inner cavity of the oil tank body (2).

7. The transformer oil tank as described in claim 6, characterized in that, There are multiple second oil outlet connection pipes (133), which are arranged at intervals along the first direction.

8. The transformer oil tank as described in claim 1, characterized in that, The first heat sink (110) is arranged perpendicularly to the outer wall of the oil tank body (2) on its side.

9. The transformer oil tank as described in claim 1, characterized in that, The plate-type heat sink (1) further includes a second heat sink row (14), which has a plurality of second heat sinks (140) arranged at intervals along a third direction. Wherein, the first oil inlet connection pipe (122) is integrated at one end of the second heat dissipation assembly (14) along the second direction, and extends along the third direction and communicates with each of the second heat dissipation fins (140); the first oil outlet connection pipe (132) is integrated at the other end of the second heat dissipation assembly (14) along the second direction, and extends along the third direction and communicates with each of the second heat dissipation fins (140). The third direction is the direction perpendicular to the plane of the outer wall of the oil tank body (2) on the side where the first heat dissipation array (11) is located.

10. An oil-immersed transformer, comprising a transformer tank and a transformer body disposed within the transformer tank, characterized in that, The transformer oil tank is the transformer oil tank as described in any one of claims 1-9.

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