Oil-immersed transformer

Abstract

The utility model discloses an oil-immersed transformer, which comprises an oil tank with a mounting cavity, a transformer main body, a structural member and a radiator with a radiating pipeline, and is characterized in that the transformer main body is mounted in the mounting cavity, and the mounting cavity is also filled with insulating oil; the radiator is arranged on one side of the oil tank, and the radiating pipeline is communicated with the mounting cavity, so that the insulating oil circularly flows between the mounting cavity and the radiating pipeline; a structural part is further arranged between the inner wall of the mounting cavity and the transformer body, so that the path length of an oil flow channel between the inner wall of the mounting cavity and the transformer body is increased through the shape structure of the structural part. According to the technical scheme, the defects that in the using process of an existing oil-immersed transformer, the oil flow resistance inside and outside the transformer body and the temperature difference are too large can be effectively overcome, and the heat exchange efficiency of oil flow in the oil-immersed transformer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to an oil-immersed transformer. Background Art

[0002] like Figure 1 As shown, the main structure of the oil-immersed transformer 100 includes an oil tank 110, a radiator 120 and a transformer body 130, wherein the oil tank 110 is filled with insulating oil, which not only plays an insulating role, but also bears a cooling role. During the operation of the oil-immersed transformer 100, the losses generated by the iron core and windings in the transformer body 130 will be converted into heat, and a temperature difference will be generated between its surface and the insulating oil and the wall of the oil tank 110. The insulating oil in the oil tank 110 forms a density difference due to the temperature difference, and forms a natural convection cycle under the action of buoyancy. Through the natural convection cycle, heat is transferred from the surface of the transformer body 130 to the insulating oil, the oil tank and the inner wall of the radiator 120 in turn, and finally transferred to the outside air through thermal convection and thermal radiation on the outer wall of the oil tank 110 and the radiator 130.

[0003] However, it is found in actual use that the oil-immersed transformer 100 of this structure, due to the iron core and winding in its transformer body 130, not only has a compact structure, but also generates a large amount of heat during operation. Therefore, the inside of the transformer body 130 has a greater oil flow resistance than the outside of the transformer body 130, and the inside of the transformer body 130 has a higher temperature than the outside of the transformer body 130, which in turn causes excessive oil flow resistance and temperature distribution differences inside the oil tank 110, affecting the heat exchange efficiency of the oil flow in the oil-immersed transformer 100. Utility Model Content

[0004] The embodiment of the present application provides an oil-immersed transformer, which aims to improve the technical problem that during the use of the existing oil-immersed transformer, there will be excessive oil flow resistance and temperature distribution differences inside the oil tank, which affects the heat exchange efficiency of the oil flow in the oil-immersed transformer.

[0005] To this end, an embodiment of the present application provides an oil-immersed transformer, comprising an oil tank having an installation cavity, a transformer main body, a structural member, and a radiator having a heat dissipation pipe, wherein the transformer main body is installed in the installation cavity, and the installation cavity is also filled with insulating oil; the radiator is arranged on one side of the oil tank, and the heat dissipation pipe is connected to the installation cavity, so that the insulating oil circulates between the installation cavity and the heat dissipation pipe; the structural member is also arranged between the inner wall of the installation cavity and the transformer main body, so as to increase the path length of the oil flow channel between the inner wall of the installation cavity and the transformer main body through the shape structure of the structural member.

[0006] Optionally, in some embodiments of the present application, the structural member includes at least two baffles;

[0007] At least two of the baffles are arranged in a first target area between the circumferential inner wall of the mounting cavity and the transformer body, and at least two of the baffles are spaced apart in the vertical direction to increase the path length of the oil flow channel in the first target area; and / or,

[0008] At least two of the baffles are arranged in a second target area between the top inner wall of the mounting cavity and the transformer body, and at least two of the baffles are spaced apart in the horizontal direction to increase the path length of the oil flow channel in the second target area; and / or,

[0009] At least two of the baffles are disposed in a third target area between the bottom inner wall of the installation cavity and the transformer body, and at least two of the baffles are spaced apart in the horizontal direction to increase the path length of the oil flow channel in the third target area.

[0010] Optionally, in some embodiments of the present application, each of the baffles is provided with at least one through hole structure.

[0011] Optionally, in some embodiments of the present application, the through hole structure includes any combination of strip-shaped long holes, polygonal holes and circular holes.

[0012] Optionally, in some embodiments of the present application, in the baffle plate in the first target area between the circumferential inner wall of the mounting cavity and the transformer body, the through-hole structures on two adjacent baffle plates are staggered in the vertical direction, so as to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the first target area; and / or,

[0013] In the baffle plate in the second target area between the top inner wall of the mounting cavity and the transformer body, the through-hole structures on two adjacent baffle plates are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the second target area by making the insulating oil flow in a curved manner in the second target area; and / or,

[0014] In the baffle plate arranged in the third target area between the bottom inner wall of the installation cavity and the transformer body, the through-hole structures on two adjacent baffle plates are staggered in the horizontal direction to increase the path length of the oil flow channel in the third target area by making the insulating oil flow in a curved manner in the third target area.

[0015] Optionally, in some embodiments of the present application, among the baffles arranged in the first target area between the circumferential inner wall of the installation cavity and the transformer body, two adjacent baffles are arranged parallel to each other, and the two adjacent baffles are staggered in the vertical direction, so as to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the first target area; and / or,

[0016] Among the baffles arranged in the second target area between the top inner wall of the installation cavity and the transformer body, two adjacent baffles are arranged parallel to each other, and the two adjacent baffles are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the second target area by making the insulating oil flow in a curved manner in the second target area; and / or,

[0017] Among the baffles arranged in the third target area between the bottom inner wall of the installation cavity and the transformer body, two adjacent baffles are arranged parallel to each other, and the two adjacent baffles are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the third target area by making the insulating oil flow in a curved manner in the third target area.

[0018] Optionally, in some embodiments of the present application, each of the baffles is fastened to the inner wall of the adjacent installation cavity.

[0019] Optionally, in some embodiments of the present application, the structural member includes at least one shell having a channel structure, and at least one of the shells is arranged between the inner wall of the mounting cavity and the transformer body to increase the path length of the oil flow channel between the inner wall of the mounting cavity and the transformer body through the channel structure of at least one of the shells.

[0020] Optionally, in some embodiments of the present application, the transformer body includes an iron core and a coil wound around the iron core.

[0021] Optionally, in some embodiments of the present application, the inner wall of the circumferential side of the installation cavity is provided with a first opening and a second opening spaced apart in the vertical direction, the radiator is tightly connected to a side of the oil tank where the first opening and the second opening are provided, and one end of the heat dissipation pipe is connected to the first opening, and the other end of the heat dissipation pipe is connected to the second opening.

[0022] In the technical solution provided by the present application, compared with the existing oil-immersed transformer, the oil-immersed transformer thereof is additionally provided with a structural member with a specific shape structure, and the structural member is located between the inner wall of the installation cavity of the oil tank and the transformer body thereof, so as to increase the path length of the oil flow channel between the inner wall of the installation cavity and the transformer body through the shape structure of the structural member. In this way, the insulating oil can be arranged so that when it flows through the area between the inner wall of the installation cavity and the transformer body, it will bend through the area under the guidance of the shape structure of the structural member, thereby greatly extending the path length of the oil flow channel in the area, thereby increasing the flow resistance in the area, making the flow resistance difference between the inside and outside of the transformer body smaller, and at the same time increasing the oil flow rate flowing through the oil channel inside the transformer body, enhancing the heat exchange effect inside the transformer body, and reducing the hot spot temperature inside the transformer body. At the same time, the high-temperature oil liquid near the transformer body passes through the oil flow channel in this area and mixes with the low-temperature oil liquid near the inner wall of the installation cavity, thereby reducing the temperature difference of the insulating oil in different areas of the installation cavity. In addition, the added structural parts can also serve as an extension of the inner wall of the installation cavity, increasing the heat exchange area between it and the insulating oil, thereby further improving the overall heat dissipation efficiency of the transformer. It can be seen that this technical solution can effectively improve the shortcomings of the existing oil-immersed transformer in the process of use, such as the large oil flow resistance and temperature difference between the inside and outside of the transformer body, and improve the heat exchange efficiency of the oil flow in the oil-immersed transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an oil-immersed transformer in the prior art;

[0024] Figure 2 for Figure 1 Schematic diagram of oil flow resistance and temperature distribution difference of oil-immersed transformer shown;

[0025] Figure 3 A partial schematic diagram of a first structure of an oil-immersed transformer according to an embodiment of the present application;

[0026] Figure 4 A partial schematic diagram of a second structure of an oil-immersed transformer according to an embodiment of the present application;

[0027] Figure 5 A partial schematic diagram of a third structure of an oil-immersed transformer according to an embodiment of the present application;

[0028] Figure 6 A partial schematic diagram of a fourth structure of an oil-immersed transformer according to an embodiment of the present application;

[0029] Figure 7 A schematic diagram of a first structural example of a through-hole structure of an oil-immersed transformer according to an embodiment of the present application;

[0030] Figure 8A second structural schematic diagram of the through-hole structure of the oil-immersed transformer according to an embodiment of the present application;

[0031] Fig. 9 This is a schematic diagram of a third structure of the through-hole structure of the oil-immersed transformer according to an embodiment of the present application.

[0032] Description of Figure Numbers:

[0033] 100, oil-immersed transformer; 110, oil tank; 120, radiator; 130, transformer body; 11, first area; 12, second area;

[0034] 200, oil-immersed transformer; 210, oil tank; 211, installation cavity; 220, transformer body; 230, structural member; 231, baffle; 232, through-hole structure. DETAILED DESCRIPTION

[0035] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" or "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] In actual use, it is found that the oil-immersed transformer 100 of the existing structure has a relatively large oil flow resistance inside the transformer body 130 due to the close structure of the iron core and the winding in the transformer body 130, which makes the flow rate of the insulating oil flowing through the area relatively low. Figure 2 As shown, the first area 11 inside the oil tank 110 is a low-speed area with high oil flow resistance, while the second area 12 is a high-speed area with low oil flow resistance. At the same time, since the first area 11 is close to the heat source such as the iron core and winding of the transformer body 130, and the second area 12 is close to the wall of the oil tank 110 and the radiator 120, the first area 11 is also a high-temperature area, and the second area 12 is also a non-high-temperature area. It can be seen that during the use of the existing oil-immersed transformer 100, there will be excessive oil flow resistance and temperature distribution differences inside the oil tank 110, which affects the heat exchange efficiency of the oil flow in the oil-immersed transformer 100.

[0037] Based on this, it is necessary to provide a new technical solution for oil-immersed transformers to effectively improve the technical problems that during the use of existing oil-immersed transformers, there will be excessive oil flow resistance and temperature distribution differences inside the oil tank, which will affect the heat exchange efficiency of the oil flow in the oil-immersed transformer.

[0038] In one embodiment, Figures 3 to 9 As shown, an embodiment of the present application provides an oil-immersed transformer 200, which includes an oil tank 210 with an installation cavity 211, a transformer body 220, a structural member 230, and a radiator (not shown) with a heat dissipation pipe, wherein the transformer body 220 is installed in the installation cavity 211, and the installation cavity 211 is also filled with insulating oil (not shown). The radiator is arranged on one side of the oil tank 210, and the heat dissipation pipe is connected to the installation cavity 211, so that the insulating oil circulates between the installation cavity 211 and the heat dissipation pipe 241. A structural member 230 is also arranged between the inner wall of the installation cavity 211 and the transformer body 230, so as to increase the path length of the oil flow channel between the inner wall of the installation cavity 211 and the transformer body 230 through the shape structure of the structural member 230.

[0039] It can be understood that the basic structure of the oil-immersed transformer 200 in this embodiment can be basically the same as that of the oil-immersed transformer 100 in the prior art, and also includes an oil tank 210, a transformer body 220 and a radiator. The only difference is that the present application also adds a structural member 230, so as to change the flow path of the insulating oil in the corresponding area (i.e., the area between the inner wall of the installation cavity 211 and the transformer body 230) through the arrangement of the structural member 230, that is, to greatly extend the path length of the oil flow channel in the corresponding area, so as to increase the flow resistance of the area between the inner wall of the installation cavity 211 and the transformer body 220. Therefore, the specific shape and structure of the structural member 230 can be adjusted arbitrarily according to actual needs, as long as the condition that the path length of the oil flow channel in the corresponding area can be increased through the guiding effect of the shape and structure of the structural member 230 is met.

[0040] In addition, the inner wall of the installation cavity 211 mentioned above may specifically include the top inner wall of the installation cavity 211, the peripheral inner wall of the installation cavity 211 and the bottom inner wall of the installation cavity 211, wherein the peripheral inner wall of the installation cavity 211 may specifically be the inner wall of the installation cavity 211 in any horizontal direction.

[0041] In this way, the oil-immersed transformer 200 of the embodiment of the present application is provided with a structural member 230 having a specific shape and structure compared to the existing oil-immersed transformer 100, and the structural member 230 is located between the inner wall of the mounting cavity 211 of the oil tank 210 and the transformer body 220, so as to increase the path length of the oil flow channel between the inner wall of the mounting cavity 211 and the transformer body 220 through the shape and structure of the structural member 230. In this way, through the above-mentioned structural setting, when the insulating oil flows through the area between the inner wall of the mounting cavity 211 and the transformer body 220, it will bend through the area under the guidance of the shape and structure of the structural member 230, thereby greatly extending the path length of the oil flow channel in the area, thereby increasing the flow resistance of the area, reducing the flow resistance difference between the inside and outside of the transformer body 202, and increasing the oil flow rate flowing through the oil channel inside the transformer body 220, thereby enhancing the heat exchange effect inside the transformer body 220 and reducing the hot spot temperature inside the transformer body 220. At the same time, the high-temperature oil liquid near the transformer body 220 passes through the oil flow channel in this area and mixes with the low-temperature oil liquid near the inner wall of the installation cavity, thereby reducing the temperature difference of the insulating oil in different areas of the installation cavity 211. In addition, the added structural member 230 can also serve as an extension of the inner wall surface of the installation cavity 211, increasing the heat exchange area between it and the insulating oil, thereby further improving the overall heat dissipation efficiency of the transformer. It can be seen that the technical solution can effectively improve the shortcomings of the existing oil-immersed transformer 100 in the process of using the transformer body 130, such as the large oil flow resistance and temperature difference inside and outside the transformer body 130, and improve the heat exchange efficiency of the oil flow in the oil-immersed transformer 200.

[0042] In some examples, such as Figures 3 to 6 As shown, the structural member 230 may specifically include at least two baffles 231, which are arranged in the first target area between the inner wall of the peripheral side of the installation cavity 211 and the transformer body 220, and the at least two baffles 231 are spaced apart in the vertical direction to increase the path length of the oil flow channel in the first target area. In this way, through the above-mentioned structural arrangement, when the insulating oil in the installation cavity 211 flows through the first target area, it needs to bypass at least two baffles 231 in sequence before it can pass through the first target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the first target area between the inner wall of the peripheral side of the installation cavity 211 and the transformer body 220, thereby increasing the flow resistance of the first target area between the inner wall of the peripheral side of the installation cavity 211 and the transformer body 220, resulting in a smaller flow resistance difference between the inside and outside of the transformer body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer body 220, enhancing the heat exchange effect inside the transformer body 220, and reducing the hot spot temperature inside the transformer body 220.

[0043] It is understandable that, in addition to providing at least two baffles 231 in the first target area to increase the path length of the oil flow channel in the first target area, Figure 4 As shown, at least two baffles 231 are arranged in the second target area between the top inner wall of the installation cavity 211 and the transformer body 220, and the at least two baffles 231 are spaced apart in the horizontal direction to increase the path length of the oil flow channel in the second target area. In this way, through the above-mentioned structural arrangement, when the insulating oil in the installation cavity 211 flows through the second target area, it needs to bypass at least two baffles 231 in sequence before it can pass through the second target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the second target area between the top inner wall of the installation cavity 211 and the transformer body 220, thereby increasing the flow resistance of the second target area between the top inner wall of the installation cavity 211 and the transformer body 220, resulting in a smaller flow resistance difference between the inside and outside of the transformer body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer body 220, enhancing the heat exchange effect inside the transformer body 220, and reducing the hot spot temperature inside the transformer body 220. In addition, at least two baffles 231 may be arranged in the third target area between the bottom inner wall of the installation cavity 211 and the transformer body 220, and the at least two baffles 231 are spaced apart in the horizontal direction to increase the path length of the oil flow channel in the third target area. In this way, through the above-mentioned structural arrangement, when the insulating oil in the installation cavity 211 flows through the third target area, it needs to bypass at least two baffles 231 in sequence before it can pass through the third target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the third target area between the bottom inner wall of the installation cavity 211 and the transformer body 220, thereby increasing the flow resistance of the third target area between the bottom inner wall of the installation cavity 211 and the transformer body 220, resulting in a smaller flow resistance difference between the inside and outside of the transformer body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer body 220, enhancing the heat exchange effect inside the transformer body 220, and reducing the hot spot temperature inside the transformer body 220.

[0044] In addition, it should be noted that the above-mentioned increase in the path length of the oil flow channel of the corresponding target area by at least two baffles 231 can be set according to actual needs, or only in one of the first target area, the second target area and the third target area, or in any two of the first target area, the second target area and the third target area, or in all of the first target area, the second target area and the third target area.

[0045] In some examples, such as Figures 3 to 9As shown, in the structural member 230, at least one through-hole structure 232 is provided on each baffle 231. In this way, by providing the through-hole structure 232, the two side areas separated by each baffle 231 can be connected only through the through-hole structure 232, so as to better guide the flow direction of the insulating oil in the installation cavity 211 reasonably, so as to better increase the path length of the oil flow channel in the corresponding area. Further, the through-hole structure 232 can specifically include any combination of strip-shaped long holes, polygonal holes and circular holes. In this way, according to actual needs, a through-hole structure 232 of a suitable shape can be selected to better guide the flow direction of the insulating oil in the installation cavity 211 reasonably, so as to better increase the path length of the oil flow channel in the corresponding area.

[0046] It is understandable that if Figure 7 As shown, when the through hole structure 232 is a strip-shaped long hole, only one strip-shaped long hole is required to be provided on the corresponding baffle 231. The strip-shaped long hole can specifically extend along the length direction of the corresponding baffle 231 and be provided adjacent to one side of the width direction of the corresponding baffle 231. Figure 8 or Fig. 9 As shown, when the through hole structure 232 is a polygonal hole or a circular hole, a plurality of polygonal holes or circular holes can be arranged on the corresponding baffle plate 231. The plurality of polygonal holes or circular holes can be distributed in sequence along the length direction of the corresponding baffle plate 231 and are all arranged adjacent to one side of the width direction of the corresponding baffle plate 231.

[0047] In some examples, such as Figures 3 to 9 As shown, in the baffle 231 arranged in the first target area between the circumferential inner wall of the installation cavity 211 and the transformer body 220, the through-hole structures 232 on the two adjacent baffles 231 are staggered in the vertical direction to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the first target area. In this way, the above-mentioned structure can be set up so that when the insulating oil in the installation cavity 211 flows through the first target area, it needs to bend and flow through the corresponding through-hole structure 232 in sequence to bypass at least two baffles 231 before it can pass through the first target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the first target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220, so that the flow resistance of the first target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220 is further increased, resulting in a smaller flow resistance difference between the inside and outside of the transformer main body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer main body 220, enhancing the heat exchange effect inside the transformer main body 220, and reducing the hot spot temperature inside the transformer main body 220.

[0048] It is understandable that, through the above method, in addition to Figure 3As shown, in addition to increasing the path length of the oil flow channel in the first target area, Figure 4 As shown, in a similar manner, the path length of the oil flow channel in the above-mentioned second target area is increased. At this time, in the baffle 231 in the second target area between the top inner wall of the installation cavity 211 and the transformer body 220, the through-hole structures 232 on the two adjacent baffles 231 are staggered in the horizontal direction to increase the path length of the oil flow channel in the second target area by making the insulating oil flow in a curved manner in the second target area. In this way, through the above-mentioned structural setting, when the insulating oil in the installation cavity 211 flows through the second target area, it needs to bend and flow through the corresponding through-hole structure 232 in sequence to bypass at least two baffles 231 before it can pass through the second target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the second target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220, so that the flow resistance of the second target area between the top inner wall of the installation cavity 211 and the transformer main body 220 is further increased, resulting in a smaller flow resistance difference between the inside and outside of the transformer main body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer main body 220, enhancing the heat exchange effect inside the transformer main body 220, and reducing the hot spot temperature inside the transformer main body 220. In addition, in a similar manner, the path length of the oil flow channel in the third target area can be increased. At this time, in the baffle 231 in the third target area between the bottom inner wall of the mounting cavity 2112 and the transformer body 220, the through-hole structures on the two adjacent baffles 231 are staggered in the horizontal direction to increase the path length of the oil flow channel in the third target area by making the insulating oil flow in a curved manner in the third target area. In this way, through the above-mentioned structural setting, when the insulating oil in the installation cavity 211 flows through the third target area, it needs to bend and flow through the corresponding through-hole structure 232 in sequence to bypass at least two baffles 231 before it can pass through the third target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the third target area between the circumferential inner wall of the installation cavity 211 and the transformer body 220, thereby further increasing the flow resistance of the third target area between the bottom inner wall of the installation cavity 211 and the transformer body 220, resulting in a smaller flow resistance difference between the inside and outside of the transformer body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer body 220, enhancing the heat exchange effect inside the transformer body 220, and reducing the hot spot temperature inside the transformer body 220.

[0049] In some examples, such as Figures 3 to 9As shown, in the baffle 231 arranged in the first target area between the circumferential inner wall of the installation cavity 211 and the transformer body 220, two adjacent baffles 231 are arranged parallel to each other, and the two adjacent baffles 231 are staggered in the vertical direction to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the first target area. In this way, the above-mentioned structure can be set up so that when the insulating oil in the installation cavity 211 flows through the first target area, it needs to bend and flow from the side of the corresponding baffle 231 to bypass at least two baffles 231 in sequence before it can pass through the first target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the first target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220, so that the flow resistance of the first target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220 is further increased, resulting in a smaller flow resistance difference between the inside and outside of the transformer main body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer main body 220, enhancing the heat exchange effect inside the transformer main body 220, and reducing the hot spot temperature inside the transformer main body 220.

[0050] It is understandable that if Figure 3 , Figure 5 and Figure 6 As shown, in the baffles 231 located in the first target area, two adjacent baffles 231 are arranged parallel to each other. Specifically, all baffles located in the first target area are arranged at the same angle with the inner wall of the peripheral side of the adjacent installation cavity 211. The same angle can be as follows: Figure 3 The acute angle shown, or it can be as Figure 5 The right angle shown can also be Figure 6 As shown in the figure, by setting two adjacent baffles 231 parallel to each other, the spacing between the two adjacent baffles 231 is also kept equal, so that the flow direction of the insulating oil through the baffles 231 can be more controllable. Thus, for those skilled in the art, according to actual needs, the two adjacent baffles 231 may not be set parallel to each other, so that the oil flow path in the corresponding area becomes irregular.

[0051] In addition, through the above method, in addition to increasing the path length of the oil flow channel in the above-mentioned first target area, the path length of the oil flow channel in the above-mentioned second target area can also be increased. At this time, in the baffle 231 in the second target area between the top inner wall of the installation cavity 211 and the transformer body 220, two adjacent baffles 231 are arranged parallel to each other, and the two adjacent baffles 231 are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the second target area. In this way, through the above-mentioned structural setting, when the insulating oil in the installation cavity 211 flows through the second target area, it needs to bend and flow from the side of the corresponding baffle 231 to bypass at least two baffles 231 in sequence before it can pass through the second target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the second target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220, so that the flow resistance of the second target area between the top inner wall of the installation cavity 211 and the transformer main body 220 is further increased, resulting in a smaller flow resistance difference between the inside and outside of the transformer main body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer main body 220, enhancing the heat exchange effect inside the transformer main body 220, and reducing the hot spot temperature inside the transformer main body 220. In addition, in a similar manner, the path length of the oil flow channel in the third target area can be increased. At this time, in the baffle 231 in the third target area between the bottom inner wall of the installation cavity 211 and the transformer body 220, two adjacent baffles 231 are arranged parallel to each other, and the two adjacent baffles 231 are staggered in the horizontal direction to increase the path length of the oil flow channel in the third target area by making the insulating oil flow in a curved manner in the third target area. In this way, through the above-mentioned structural setting, when the insulating oil in the installation cavity 211 flows through the third target area, it needs to bend and flow from the side of the corresponding baffle 231 to bypass at least two baffles 231 in sequence before it can pass through the third target area and flow to other areas in the installation cavity 211, thereby increasing the path length of the oil flow channel in the third target area between the circumferential inner wall of the installation cavity 211 and the transformer main body 220, so that the flow resistance of the third target area between the bottom inner wall of the installation cavity 211 and the transformer main body 220 is further increased, resulting in a smaller flow resistance difference between the inside and outside of the transformer main body 220, while increasing the oil flow rate flowing through the oil channel inside the transformer main body 220, enhancing the heat exchange effect inside the transformer main body 220, and reducing the hot spot temperature inside the transformer main body 220.

[0052] In some examples, such as Figures 3 to 9As shown, each baffle 231 is fastened to the inner wall of the adjacent mounting cavity 211. Thus, through the above-mentioned structural arrangement, the added structural member 230 can be used as an extension of the inner wall of the mounting cavity 211, thereby increasing the heat exchange area between the structural member 230 and the insulating oil, thereby further improving the overall heat dissipation efficiency of the oil-immersed transformer 100.

[0053] In some examples, in addition to increasing the path length of the oil flow channel in the corresponding area by at least two baffles 231, the structural member 230 may also adopt other shape structures to increase the path length of the oil flow channel in the corresponding area. For example, the structural member 230 may also include at least one shell having a channel structure, and at least one shell is arranged between the inner wall of the installation cavity 211 and the transformer body 220 to increase the path length of the oil flow channel between the inner wall of the installation cavity 211 and the transformer body 220 through the channel structure of at least one shell. In this way, through the above-mentioned structural setting, it is only necessary to set corresponding shells in the first target area, the second target area and the third target area, so that when the insulating oil in the installation cavity 211 flows through the corresponding target area, it needs to flow through the corresponding channel structure to pass through the corresponding target area and flow to other areas in the installation cavity 211, thereby increasing the flow resistance of the corresponding target area between the inner wall of the peripheral side of the installation cavity 211 and the transformer body 220, thereby reducing the flow resistance difference between the inside and outside of the transformer body 220, while increasing the oil flow rate flowing through the internal oil channel of the transformer body 220, enhancing the internal heat exchange effect of the transformer body 220, and reducing the hot spot temperature inside the transformer body 220.

[0054] In some examples, such as Figures 3 to 9 As shown, the transformer body 220 may specifically include an iron core (not shown in the figure) and a coil (not shown in the figure) wound on the iron core. In this way, the transformer body 220 can realize the voltage transformation function by energizing the coil. Further, the inner wall of the peripheral side of the installation cavity 211 is provided with a first opening and a second opening in the vertical direction, and the radiator is closely connected to the side of the oil tank 210 where the first opening and the second opening are provided, and one end of the heat dissipation pipe is connected to the first opening, and the other end of the heat dissipation pipe is connected to the second opening. In this way, through the structural setting that the radiator is closely connected to one side of the oil tank 210, the insulating oil can bring the heat to the inner wall of the peripheral side of the installation cavity 211, and then transfer it to the outside air through the radiator that is closely arranged. At the same time, through one end of the above-mentioned heat dissipation pipe being connected to the first opening, and the other end of the heat dissipation pipe being connected to the second opening, the insulating oil can be better circulated between the installation cavity 211 and the heat dissipation pipe, so that the heat in the installation cavity 211 can be continuously brought to the heat dissipation pipe by the insulating oil, so as to be transferred to the outside air through the radiator.

[0055] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil-immersed transformer, characterized in that: The invention comprises an oil tank with an installation cavity, a transformer body, a structural member and a radiator with a heat dissipation pipe, wherein the transformer body is installed in the installation cavity, and the installation cavity is also filled with insulating oil; the radiator is arranged on one side of the oil tank, and the heat dissipation pipe is connected to the installation cavity, so that the insulating oil circulates between the installation cavity and the heat dissipation pipe; the structural member is also arranged between the inner wall of the installation cavity and the transformer body, so as to increase the path length of the oil flow channel between the inner wall of the installation cavity and the transformer body through the shape structure of the structural member.

2. The oil-immersed transformer according to claim 1, characterized in that: The structural member includes at least two baffles; At least two of the baffles are arranged in a first target area between the circumferential inner wall of the mounting cavity and the transformer body, and at least two of the baffles are spaced apart in the vertical direction to increase the path length of the oil flow channel in the first target area; and / or, At least two of the baffles are arranged in a second target area between the top inner wall of the mounting cavity and the transformer body, and at least two of the baffles are spaced apart in the horizontal direction to increase the path length of the oil flow channel in the second target area; and / or, At least two of the baffles are disposed in a third target area between the bottom inner wall of the installation cavity and the transformer body, and at least two of the baffles are spaced apart in the horizontal direction to increase the path length of the oil flow channel in the third target area.

3. The oil-immersed transformer according to claim 2, characterized in that: Each of the baffles is provided with at least one through-hole structure.

4. The oil-immersed transformer according to claim 3, characterized in that: The through hole structure includes any combination of strip-shaped long holes, polygonal holes and round holes.

5. The oil-immersed transformer according to claim 3, characterized in that: In the baffle plate in the first target area between the inner wall of the peripheral side of the installation cavity and the transformer body, the through-hole structures on two adjacent baffle plates are staggered in the vertical direction, so as to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the first target area; and / or, In the baffle plate in the second target area between the top inner wall of the mounting cavity and the transformer body, the through-hole structures on two adjacent baffle plates are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the second target area by making the insulating oil flow in a curved manner in the second target area; and / or, In the baffle plate arranged in the third target area between the bottom inner wall of the mounting cavity and the transformer body, the through-hole structures on two adjacent baffle plates are staggered in the horizontal direction so as to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the third target area.

6. The oil-immersed transformer according to claim 2, characterized in that: Among the baffles arranged in the first target area between the circumferential inner wall of the installation cavity and the transformer body, two adjacent baffles are arranged parallel to each other, and the two adjacent baffles are staggered in the vertical direction, so as to increase the path length of the oil flow channel in the first target area by making the insulating oil flow in a curved manner in the first target area; and / or, Among the baffles arranged in the second target area between the top inner wall of the installation cavity and the transformer body, two adjacent baffles are arranged parallel to each other, and the two adjacent baffles are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the second target area by making the insulating oil flow in a curved manner in the second target area; and / or, Among the baffles arranged in the third target area between the bottom inner wall of the installation cavity and the transformer body, two adjacent baffles are arranged parallel to each other, and the two adjacent baffles are staggered in the horizontal direction, so as to increase the path length of the oil flow channel in the third target area by making the insulating oil flow in a curved manner in the third target area.

7. The oil-immersed transformer according to claim 2, characterized in that: Each baffle is firmly connected to the inner wall of the adjacent installation cavity.

8. The oil-immersed transformer according to claim 1, characterized in that: The structural member includes at least one shell having a channel structure, and at least one of the shells is arranged between the inner wall of the installation cavity and the transformer body, so as to increase the path length of the oil flow channel between the inner wall of the installation cavity and the transformer body through the channel structure of at least one of the shells.

9. The oil-immersed transformer according to any one of claims 1 to 8, characterized in that: The transformer body includes an iron core and a coil wound around the iron core.

10. The oil-immersed transformer according to any one of claims 1 to 8, characterized in that: The inner wall of the peripheral side of the installation cavity is provided with a first opening and a second opening spaced apart in the vertical direction, the radiator is tightly connected to the side of the oil tank where the first opening and the second opening are provided, and one end of the heat dissipation pipe is connected to the first opening, and the other end of the heat dissipation pipe is connected to the second opening.

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