A heat dissipation device for an oil-immersed transformer

Abstract

This utility model relates to a heat dissipation device for an oil-immersed transformer, comprising: an oil pipe structure including an arc-shaped pipe with interfaces at both ends, the oil pipe structure being connected to the main body of the oil-immersed transformer through the interfaces, forming an enclosing space between the oil pipe structure and the main body of the oil-immersed transformer; a heat dissipation structure composed of multiple heat sinks, the heat sinks being located on the arc-shaped surface of the outer wall of the arc-shaped pipe and protruding outwards; and a heat exchange structure including a water tank located in the enclosing space, the water tank being installed on the outside of the main body of the oil-immersed transformer, heat exchange coils in the arc-shaped pipe, and a pump assembly in the water tank. This heat dissipation device for an oil-immersed transformer features an arc-shaped surface on the arc-shaped pipe, which, compared to a planar design, provides a larger area, allowing for the installation of more heat sinks with the same spacing, thus better assisting in the cooling of the transformer oil.

Description

Technical Field

[0001] This utility model relates to the field of immersion transformer technology, specifically a heat dissipation device for an oil-immersed transformer. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are a primary coil, a secondary coil, and an iron core. In electrical equipment and wireless circuits, it is commonly used for voltage step-up and step-down, impedance matching, and safety isolation. In a generator, whether the coil moves through a magnetic field or the magnetic field moves through a fixed coil, an induced electromotive force is generated in the coil. In both cases, the value of the magnetic flux remains unchanged, but the amount of magnetic flux cross-linked with the coil changes. This is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current, and impedance.

[0003] Oil-immersed transformers, as a type of transformer, rely on transformer oil for insulation and heat dissipation. The heat dissipation efficiency directly affects the operational stability of the equipment. Existing technology disclosure number CN213070848U describes a new type of heat-dissipating double-core transformer. In this design, an oil delivery plate is installed on the outside of the transformer shell, and a heat dissipation plate is installed on the outside of the oil delivery plate. In addition, a wind-driven stirring blade is designed to agitate the oil to improve heat dissipation performance.

[0004] The existing technology has some shortcomings. First, the heat dissipation area of ​​the solution is still limited by the structure. The main reason is that, as can be seen from the attached figure, the connection side between the oil supply plate and the heat dissipation plate adopts a planar wall design, which limits the effective heat dissipation area per unit volume and restricts the further improvement of heat exchange efficiency. Second, the heat dissipation process relies entirely on natural air convection and wind disturbance. The heat dissipation capacity is significantly reduced in high temperature or closed environment, and the oil temperature cannot be actively regulated. Therefore, a heat dissipation device for oil-immersed transformers is proposed. Utility Model Content

[0005] Based on the above description, this utility model provides a heat dissipation device for an oil-immersed transformer, which solves the technical problems pointed out in the background art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A heat dissipation device for an oil-immersed transformer, comprising:

[0007] The oil pipe structure includes an arc-shaped pipe with interfaces at both ends. The oil pipe structure is connected to the main body of the oil-immersed transformer through the interfaces, and an enclosing space is formed between the oil pipe structure and the main body of the oil-immersed transformer.

[0008] The heat dissipation structure consists of multiple heat sinks, which are located on the arc-shaped surface of the outer wall of the arc-shaped tube and protrude outwards.

[0009] The heat exchange structure includes a water tank located in the enclosing space, the water tank being installed on the outside of the oil-immersed transformer body, a heat exchange coil in an arc-shaped tube, a pump assembly being installed in the water tank, the pump assembly being connected to the inlet of the heat exchange coil, and the outlet of the heat exchange coil being connected to the water tank.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the number of the oil pipe structures is no less than one set.

[0012] Furthermore, the number of oil pipe structures is four, and they are linearly distributed at equal intervals from top to bottom on the outer wall of the oil-immersed transformer body.

[0013] Furthermore, the pump assembly includes a submersible circulating water pump, the inlet end of which is provided with an inlet pipe connected to the water tank, the outlet end of which is provided with a guide pipe, and a connecting pipe is provided between the guide pipe and all heat exchange coils.

[0014] Furthermore, a semiconductor cooling chip is provided on the top of the water tank, with the cold end of the semiconductor cooling chip located inside the water tank and the hot end of the semiconductor cooling chip located outside the water tank.

[0015] Furthermore, the semiconductor cooling chip is provided with at least one set of fans.

[0016] Furthermore, the arc-shaped tube comprises a lower frame and an upper cover, with the upper cover detachably mounted on the lower frame.

[0017] An oil-immersed transformer includes a heat dissipation device for the oil-immersed transformer.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] 1. The heat dissipation device of this oil-immersed transformer has an arc-shaped tube with an arc surface. Compared with the flat design, this design has a larger area. With the same spacing, more heat sinks can be installed, which can better assist the heat dissipation of the transformer oil and avoid the situation where poor heat dissipation efficiency directly affects the stability of equipment operation.

[0020] 2. The heat dissipation device of this oil-immersed transformer is designed with a heat exchange structure, which allows water to be continuously introduced into the heat exchange coil to achieve water circulation. The heat is exchanged through the heat exchange coil, providing good heat dissipation for the oil-immersed transformer and avoiding the situation where poor heat dissipation efficiency directly affects the stability of equipment operation. Attached Figure Description

[0021] Figure 1A schematic diagram of a heat dissipation device for an oil-immersed transformer provided in an embodiment of this utility model;

[0022] Figure 2 A schematic diagram of a heat dissipation device for an oil-immersed transformer installed on one side of the main body of the oil-immersed transformer, as provided in an embodiment of this utility model;

[0023] Figure 3 for Figure 1 A structural diagram from another perspective;

[0024] Figure 4 This is a schematic diagram of the heat exchange coil and its connection structure in an embodiment of this utility model;

[0025] Figure 5 This is a schematic planar view of the water tank in a cross-section according to an embodiment of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Oil pipe structure; 11. Arc-shaped pipe; 12. Interface; 2. Heat dissipation structure; 3. Heat exchange structure; 31. Water tank; 32. Heat exchange coil; 33. Inlet pipe; 34. Submersible circulating water pump; 35. Guide pipe; 36. Connecting pipe; 37. Semiconductor cooling chip; 38. Fan. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] like Figure 1-5 As shown, a heat dissipation device for an oil-immersed transformer in this embodiment includes an oil pipe structure 1, a heat dissipation structure 2, and a heat exchange structure 3. The oil pipe structure 1 is mainly used to connect with the main body of the oil-immersed transformer, allowing the oil connected to the main body of the oil-immersed transformer to enter the oil pipe structure 1. The heat dissipation structure 2 is installed on the outside of the oil pipe structure 1. The heat exchange structure 3 uses circulating water to achieve heat exchange and cooling of the transformer oil in the oil pipe structure 1, avoiding the situation where poor heat dissipation efficiency directly affects the operational stability of the equipment.

[0030] Firstly, the oil pipe structure 1 includes an arc-shaped pipe 11 and two interfaces 12. The two interfaces 12 are welded and fixed to both ends of the arc-shaped pipe 11. The oil pipe structure 1 is connected to the main body of the oil-immersed transformer through the interfaces 12. Specifically, in practice, the side wall of the main body of the oil-immersed transformer needs to be fixed with an adapter port. By installing the interface 12 at the corresponding adapter port and then connecting and fixing it with bolts, the oil can enter the oil pipe structure 1 when transformer oil is introduced into the main body of the oil-immersed transformer.

[0031] It should be noted that an enclosing space is formed between the oil pipe structure 1 and the main body of the oil-immersed transformer. In order to make full use of this space, the heat exchange structure 3 is preferably designed in this enclosing space to achieve reasonable use of the space.

[0032] The heat dissipation structure 2 is composed of multiple heat sinks. The heat sinks are welded to the arc-shaped surface of the outer wall of the arc-shaped tube 11, with one side extending into the arc-shaped tube 11 and protruding outward. In this design, the arc-shaped tube 11 has an arc-shaped surface, which has a larger area than the planar design. With the same spacing, more heat sinks can be installed, which can better assist in the heat dissipation of transformer oil and avoid the situation where poor heat dissipation efficiency directly affects the stability of equipment operation.

[0033] To further improve heat dissipation performance and meet the requirements of active adjustment design, the heat exchange structure 3 in this embodiment includes a water tank 31 located in the enclosing space. The water tank 31 is fixedly installed on the outside of the oil-immersed transformer body by bolts, and a heat exchange coil 32 is installed in the arc-shaped tube 11. A pump assembly is installed in the water tank 31, and the pump assembly is connected to the inlet of the heat exchange coil 32. The outlet of the heat exchange coil 32 is connected to the water tank 31.

[0034] It should be noted that the arc-shaped tube 11 consists of a lower frame and an upper cover. The upper cover is detachably mounted on the lower frame by bolts, which are not shown in the diagram. This allows the upper cover to be removed to observe the internal condition, such as to inspect the heat exchange coil 32.

[0035] With this design, when the pump unit is working, water in the water tank 31 can continuously pass through the heat exchange coil 32, and the heat exchange coil 32 exchanges heat in the arc-shaped tube 11. The water then returns to the water tank 31. This design enables active regulation and better assists in the cooling of transformer oil, avoiding situations where poor cooling efficiency directly affects the stability of equipment operation.

[0036] In the above design, the number of oil pipe structure 1 is not less than one set. In the preferred design, the number of oil pipe structure 1 is four sets, which are linearly distributed at equal distances from top to bottom on the outer wall of the oil-immersed transformer body. It can be understood that the number is determined according to the size of the oil-immersed transformer, which will not be elaborated on here.

[0037] The pump unit includes a submersible circulating water pump 34. The inlet end of the submersible circulating water pump 34 is connected to an inlet pipe 33 that is connected to a water tank 31. The outlet end of the submersible circulating water pump 34 is connected to a guide pipe 35. A connecting pipe 36 is provided between the guide pipe 35 and all heat exchange coils 32.

[0038] With this design, when the submersible circulating water pump 34 is started, water in the water tank 31 enters through the inlet pipe 33, and is then guided through the guide pipe 35 and the connecting pipe 36, allowing the water to continuously flow into the heat exchange coil 32, where heat exchange is performed, and then the water returns to the water tank 31.

[0039] Considering that the water in the water tank 31 will heat up when the water is circulated, in order to cool the water, in the preferred design, a semiconductor cooling chip 37 is fixed to the top of the water tank 31 by bolts. The cold end of the semiconductor cooling chip 37 is located in the water tank 31, and the hot end of the semiconductor cooling chip 37 is located on the outside of the water tank 31. In this way, the semiconductor cooling chip 37 cools the water based on the Peltier effect.

[0040] In addition, at least one set of fans 38 are fixed on the thermoelectric cooler 37 by bolts, which can quickly remove the heat from the hot end of the thermoelectric cooler 37 when the fans 38 are started.

[0041] An oil-immersed transformer includes a heat dissipation device for the oil-immersed transformer. In this way, the oil-immersed transformer can achieve good heat dissipation through the heat dissipation device, that is, achieve heat exchange and cooling of the transformer oil in the oil pipe structure 1, and avoid the situation where poor heat dissipation efficiency directly affects the stability of equipment operation.

[0042] In summary, the arc-shaped tube 11 has an arc-shaped surface, which provides a larger area compared to a planar design. With the same spacing, more heat sinks can be installed, better assisting in the cooling of the transformer oil and preventing poor heat dissipation from directly affecting the stability of equipment operation. Furthermore, it can actively cool the water. The submersible circulating water pump 34 starts, and water from the water tank 31 enters through the inlet pipe 33, then flows through the guide pipe 35 and connecting pipe 36, continuously supplying water to the heat exchange coil 32 for heat exchange. The water then returns to the water tank 31, and the semiconductor cooling chip 37, based on the Peltier effect, cools the water. This provides excellent heat dissipation for the oil-immersed transformer, preventing poor heat dissipation from directly affecting the stability of equipment operation.

[0043] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A heat dissipating device for an oil-immersed transformer, characterized by comprising: include: The oil pipe structure (1) includes an arc-shaped pipe (11), with interfaces (12) provided at both ends of the arc-shaped pipe (11). The oil pipe structure (1) is connected to the main body of the oil-immersed transformer through the interfaces (12), and an enclosing space is formed between the oil pipe structure (1) and the main body of the oil-immersed transformer. The heat dissipation structure (2) consists of multiple heat dissipation fins, which are located on the arc surface of the outer wall of the arc tube (11) and protrude outwards. The heat exchange structure (3) includes a water tank (31) located in the enclosing space. The water tank (31) is installed on the outside of the body of the oil-immersed transformer. A heat exchange coil (32) is located in the arc-shaped tube (11). A pump assembly is installed in the water tank (31). The pump assembly is connected to the inlet of the heat exchange coil (32). The outlet of the heat exchange coil (32) is connected to the water tank (31).

2. A heat dissipating device for an oil immersed transformer as claimed in claim 1, wherein: The number of the oil pipe structure (1) is not less than one set.

3. A heat sink for an oil immersed transformer as claimed in claim 2, wherein: The number of oil pipe structures (1) is four, and they are linearly distributed at equal distances from top to bottom on the outer wall of the oil-immersed transformer body.

4. A heat sink for an oil immersed transformer as claimed in claim 3, wherein: The pump assembly includes a submersible circulating water pump (34), the inlet end of which is provided with an inlet pipe (33) connected to the water tank (31), the outlet end of which is provided with a guide pipe (35), and a connecting pipe (36) is provided between the guide pipe (35) and all heat exchange coils (32).

5. A heat sink for an oil immersed transformer as claimed in claim 4, wherein: The top of the water tank (31) is provided with a semiconductor cooling chip (37), the cold end of the semiconductor cooling chip (37) is located in the water tank (31), and the hot end of the semiconductor cooling chip (37) is located on the outside of the water tank (31).

6. A heat sink for an oil immersed transformer as claimed in claim 5, wherein: The semiconductor cooling chip (37) is provided with at least one set of fans (38).

7. A heat sink for an oil immersed transformer as claimed in claim 6, wherein: The arc-shaped tube (11) consists of a lower frame and an upper cover, with the upper cover being detachably mounted on the lower frame.

8. An oil-immersed transformer, characterized in that: The heat dissipation device includes the oil-immersed transformer as described in any one of claims 1-7.

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