Circulating heat dissipation oil-immersed transformer

Abstract

The invention discloses a circulating heat dissipation oil-immersed transformer, and belongs to the technical field of transformers, the circulating heat dissipation oil-immersed transformer comprises a transformer body and an insulation terminal installed at the upper end of the transformer body, heat dissipation plates are installed on the front side and the rear side of the transformer body, and heat dissipation fins are fixed to the side edges of the heat dissipation plates; one end of the pump machine is connected with the first-stage refrigeration air box through a pipeline, the other end of the pump machine is connected with the first-stage refrigeration air box through an air conveying guide pipe to form a circulating heat dissipation system, and the air conveying guide pipe sequentially penetrates through heat dissipation plates on the front side and the rear side of the transformer body and a second-stage refrigeration air box fixed to the left side of the transformer body. According to the oil-immersed transformer capable of dissipating heat circularly, heat exchange can be carried out between a cold source circularly conveyed in the cooling pipeline and heat of the transformer, a secondary cooling component is arranged in the middle section of the cooling pipeline, and the cold source in the cooling pipeline is cooled in the middle section; and the heat exchange effect of the rear half section of cold source is equal to that of the front half section of cold source.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to an oil-immersed transformer with circulating heat dissipation. Background Technology

[0002] Oil-immersed transformers are core equipment in power systems and are widely used in power transmission and distribution, new energy power generation, and industrial fields. Their core function is to achieve voltage conversion through the principle of electromagnetic induction, while relying on insulating oil for heat dissipation and insulation protection.

[0003] For example, the Chinese patent with announcement number CN118538509B, patent application title: A water-cooled special transformer, and announcement date: 2024-11-01, includes a water-cooled box fixed to the top of the transformer body, heat-conducting copper pipes of the same specification laid on the front and rear sides of the transformer body, the two heat-conducting copper pipes respectively connected to the interior of the water-cooled box, heat dissipation fins integrally formed on the left and right sides of the transformer body, and a serpentine buffer transition pipe set inside the water-cooled box. One end of the serpentine buffer transition pipe is connected to one of the heat-conducting copper pipes through a first connecting pipe, and the other end is connected to another heat-conducting copper pipe through a first connecting pipe of the same specification.

[0004] The existing technology has the following technical problems: In order to improve the heat dissipation and cooling effect of the transformer, the existing transformer is equipped with cooling pipes and uses the cold source inside the cold air pipes for heat exchange and cooling. However, as the cold source flows, the temperature of the cold source in the first half will rise after heat exchange. Then, when the second half of heat exchange and cooling is carried out, the heated cold source will easily cause the cooling effect of the second half to be inferior to that of the first half.

[0005] Therefore, we propose an oil-immersed transformer with circulating heat dissipation to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide an oil-immersed transformer with circulating heat dissipation, in order to improve the heat dissipation and cooling effect of existing transformers on the market, by setting up cooling pipes and using the cold source inside the cold air pipes for heat exchange and cooling. However, as the cold source flows, the temperature of the cold source in the first half will rise after heat exchange, and then when the second half of heat exchange and cooling is carried out, the heated cold source will easily cause the cooling effect of the second half to be inferior to that of the first half.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an oil-immersed transformer with circulating heat dissipation, comprising a transformer body and insulating terminals installed on the upper end of the transformer body. Heat dissipation plates are installed on the front and rear sides of the transformer body, and heat dissipation fins are fixed on the sides of the heat dissipation plates. A pump is installed on the right side of the transformer body, and one end of the pump is connected to a primary refrigeration gas box through a pipe. The other end of the pump is connected to the primary refrigeration gas box through a gas delivery pipe, forming a circulating heat dissipation system. The gas delivery pipe passes sequentially through the heat dissipation plates on the front and rear sides of the transformer body and a secondary refrigeration gas box fixed on the left side of the transformer body. The cold air inside the secondary refrigeration gas box is used to cool the gas delivery pipe, so that the temperature of the cold source inside the gas delivery pipe is equal before and after.

[0008] Preferably, the heat dissipation fins are evenly distributed on the side of the heat dissipation plate, and the surface of the heat dissipation fins is provided with a straight section and a protruding section, the protruding section being configured as an arc-shaped structure.

[0009] By adopting the above technical solution, the straight sections and protruding ends of the heat dissipation fins can increase the contact area with the outside air and improve the heat exchange effect.

[0010] Preferably, the heat sink has a hollow structure inside, and the hollow cavity inside the heat sink is filled with coolant.

[0011] By adopting the above technical solution, the coolant inside the heat sink can exchange heat with the heat sink, thereby improving the heat dissipation and cooling effect of the transformer body.

[0012] Preferably, the gas delivery duct consists of a fixed tube and a movable tube, with the movable tube passing through the middle of the heat sink. The movable tube is rotatable on the fixed tube, and a sealing ring is provided at the joint between the movable tube and the fixed tube.

[0013] By adopting the above technical solution, the sealing performance at the connection between the movable pipe and the fixed pipe can be improved through the sealing ring at the joint of the movable pipe and the fixed pipe.

[0014] Preferably, multiple baffles are fixed on the movable tube, and the end of the baffle away from the movable tube is set as an open structure, and the opening of the baffle located directly above the movable tube can be separated from the coolant inside the heat sink.

[0015] By adopting the above technical solution, the rotation of the movable tube can cause the baffle to rotate synchronously, thereby agitating the coolant inside the heat sink and improving the heat exchange effect of the coolant. At the same time, the baffle located directly above the movable tube can detach from the coolant surface, allowing the baffle to hold some coolant, thus changing the coolant level inside the heat sink.

[0016] Preferably, an electric push rod is fixed at the lower end of the transformer body, and a power gear is installed at the telescopic end of the electric push rod. The side of the power gear is meshed with a transmission gear fixed in the middle of the movable tube.

[0017] By adopting the above technical solution, when the power gear frame moves, the meshing transmission gears can drive the movable tube to rotate synchronously.

[0018] Preferably, the heat sink has a buoyancy plate inside, and a lightweight adjustment frame is fixed to the upper end of the buoyancy plate. The lightweight adjustment frame is connected to the heat sink via an auxiliary spring. A vertical rod is fixed on the lightweight adjustment frame and is located between adjacent heat sink fins. A receiving cavity is opened inside the vertical rod, and a movable plate is inserted into the receiving cavity. A cleaning pad is fixed to one end of the movable plate that extends out of the receiving cavity. The movable plates on the left and right sides of the vertical rod are connected to each other via built-in springs. An air vent is provided on the side of the receiving cavity.

[0019] By adopting the above technical solution, and by setting the buoyancy plate inside the heat sink, the buoyancy plate can move up and down according to the liquid level when the liquid level inside the heat sink changes.

[0020] Preferably, the cross-section of the movable plate is set as an "I" shape, and a sealing ring is bonded to one end of the movable plate inside the accommodating cavity, and the movable plate and the accommodating cavity are slidably connected.

[0021] By adopting the above technical solution, the sealing performance of the moving plate can be improved when it moves in the accommodating cavity through the setting of the sealing ring.

[0022] Preferably, the cleaning pad extending from one end of the movable plate into the accommodating cavity is initially attached to the straight section of the heat dissipation fin side, and multiple air vents are evenly distributed on the side of the accommodating cavity.

[0023] By adopting the above technical solution, the reciprocating movement of the moving plate in the accommodating cavity can draw in and discharge the airflow from the outside through the air outlet, thereby accelerating the airflow around the adjacent heat dissipation fins.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the oil-immersed transformer with circulating heat dissipation can exchange heat with the heat of the transformer through the cold source circulated inside the cooling pipe, and a secondary cooling component is set in the middle section of the cooling pipe. By cooling the cold source inside the cooling pipe in the middle section, the heat exchange effect of the cold source in the second half of the cooling pipe is equal to that in the first half of the cooling pipe. 1. It is equipped with heat dissipation fins, and the surface of the heat dissipation fins is provided with straight sections and protruding sections. By setting the straight sections and protruding sections, the contact area between the heat dissipation fins and the outside air can be increased, thereby increasing the overall heat exchange effect. 2. Equipped with a two-stage refrigeration gas box, after the pump is turned on, it can draw in the cold air from the first-stage refrigeration gas box and transmit it through the gas delivery pipe. The cold air transmitted in the gas delivery pipe can pass through the heat sink, and the cold air inside the gas delivery pipe can exchange heat with the coolant inside the heat sink to lower the temperature, thereby ensuring that the coolant remains at a low temperature after a period of use. The gas delivery pipe also passes through the second-stage refrigeration gas box, which can cool the gas delivery pipe after the first half of the heat exchange, thereby ensuring that the temperature of the cold air inside the gas delivery pipe is the same as that of the air inside the first half of the heat exchange process. 3. Equipped with a baffle plate, the rotation of the baffle plate first agitates the coolant inside the heat sink, improving its flow and heat exchange efficiency. Simultaneously, the rotation of the baffle plate changes the coolant level inside the heat sink, causing the upright to move the movable plate up and down. This up-and-down movement of the movable plate cleans impurities adhering to the surface of the heat sink fins using a cleaning pad. The contact and disengagement of the movable plate and cleaning pad with the protruding section allows the movable plate to move back and forth within the housing cavity. This movement of the movable plate within the housing cavity draws in and discharges external air through the vents, thereby accelerating the airflow around adjacent heat sink fins and preventing heat buildup due to slow airflow. Attached Figure Description

[0025] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a schematic diagram of the gas delivery duct and the secondary refrigeration gas box structure of the present invention; Figure 3 This is a schematic diagram of the electric push rod and power gear frame structure of the present invention; Figure 4 This is a schematic diagram of the straight section and the protruding section of the present invention; Figure 5 This is a schematic diagram of the lightweight adjustment frame and upright structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the active tube and baffle plate structure of the present invention; Figure 8 This is a schematic diagram of the upright and movable plate structure of the present invention; Figure 9 This is a schematic diagram of the accommodating cavity and air outlet structure of the present invention.

[0026] In the diagram: 1. Transformer body; 2. Insulating terminal; 3. Heat sink; 4. Heat sink fins; 401. Straight section; 402. Protruding section; 5. Pump; 6. Primary refrigeration gas box; 7. Gas delivery duct; 701. Fixed pipe; 702. Movable pipe; 8. Secondary refrigeration gas box; 9. Electric push rod; 10. Power gear frame; 11. Transmission gear; 12. Baffle plate; 13. Buoyancy plate; 14. Lightweight adjustment frame; 15. Auxiliary spring; 16. Upright pole; 17. Reception cavity; 18. Moving plate; 19. Cleaning pad; 20. Built-in spring; 21. Air outlet. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figures 1-9 To improve heat dissipation and cooling in existing transformers, cooling pipes are installed, utilizing the cold source inside the pipes for heat exchange and cooling. However, as the cold source flows, the temperature of the cold source in the first half rises after heat exchange. Consequently, during the subsequent heat exchange and cooling in the second half, the increased temperature of the cold source makes the cooling effect of the second half less effective than that of the first half. To address this technical problem, this embodiment discloses the following technical content: an oil-immersed transformer with circulating heat dissipation, including a transformer body 1 and insulated terminals 2 installed on the upper end of the transformer body 1. Heat dissipation plates 3 are installed on the front and rear sides of the transformer body 1, and heat dissipation fins 4 are fixed to the sides of the heat dissipation plates 3. A pump 5 is installed on the right side of the transformer body 1, and one end of the pump 5 is connected to a primary cooling system via a pipe. The boxes 6 are interconnected. The other end of the pump 5 is connected to the primary cooling gas box 6 through the gas delivery pipe 7 to form a circulating heat dissipation system. The gas delivery pipe 7 passes through the heat dissipation plates 3 on the front and rear sides of the transformer body 1 and the secondary cooling gas box 8 fixed on the left side of the transformer body 1. The cold air inside the secondary cooling gas box 8 is used to cool the gas delivery pipe 7 so that the temperature of the cold source inside the gas delivery pipe 7 is equal. Multiple heat dissipation fins 4 are evenly distributed on the side of the heat dissipation plate 3. The surface of the heat dissipation fins 4 is provided with a straight section 401 and a protruding section 402. The protruding section 402 is set as an arc structure. The interior of the heat dissipation plate 3 is set as a hollow structure. The hollow cavity inside the heat dissipation plate 3 is filled with coolant. The gas delivery pipe 7 is composed of a fixed pipe 701 and a movable pipe 702. The movable pipe 702 passes through the middle of the heat dissipation plate 3.

[0029] When the transformer body 1 is operating, the heat generated by the transformer body 1 can be absorbed by the heat sink 3 and heat sink fins 4. Since the heat sink 3 is filled with coolant, heat exchange can occur between the coolant and the outside air, thereby reducing the temperature of the transformer body 1. At the same time, the pump 5 is turned on. After the pump 5 is turned on, it can draw in the cold air from the primary refrigeration gas box 6 and transmit it through the gas delivery pipe 7. The cold air transmitted in the gas delivery pipe 7 can pass through the heat sink 3, and the cold air inside the gas delivery pipe 7 can interact with the coolant inside the heat sink 3. The heat exchange cooling ensures that the coolant remains at a low temperature after a period of use. Similarly, the gas duct 7 also passes through a secondary refrigeration box 8, which cools the gas duct 7 after the first half of the heat exchange. This ensures that the temperature of the cold air inside the gas duct 7 is the same as that of the air inside the first half during the second half of the heat exchange. The surface of the heat dissipation fins 4 is provided with a straight section 401 and a protruding section 402. The straight section 401 and the protruding section 402 increase the contact area between the heat dissipation fins 4 and the outside air, thereby increasing the overall heat exchange effect.

[0030] Example 2: The technical content disclosed in this example is a further improvement based on Example 1 described above. The following technical content is disclosed in this example: Figures 2-9As shown, the movable tube 702 can rotate on the fixed tube 701, and a sealing ring is provided at the joint between the movable tube 702 and the fixed tube 701. Multiple baffles 12 are fixed on the movable tube 702, and the end of each baffle 12 away from the movable tube 702 is an open structure. The opening of the baffle 12 located directly above the movable tube 702 can detach from the coolant inside the heat sink 3. An electric push rod 9 is fixed to the lower end of the transformer body 1, and a power gear 10 is installed on the telescopic end of the electric push rod 9. A transmission gear 11 fixed in the middle of the movable tube 702 is meshed with the side of the power gear 10. A buoyancy plate 13 is provided inside the heat sink 3, and a lightweight adjustment frame 14 is fixed to the upper end of the buoyancy plate 13. The lightweight adjustment frame 14 is connected to the heat sink 3 via an auxiliary spring 15. A support rod 16 is fixed on the frame 14, and the support rod 16 is located between adjacent heat dissipation fins 4. The support rod 16 has an internal cavity 17, and a movable plate 18 is inserted into the cavity 17. A cleaning pad 19 is fixed to one end of the movable plate 18 that extends out of the cavity 17. The movable plates 18 on the left and right sides of the support rod 16 are connected to each other by built-in springs 20. An air vent 21 is provided on the side of the cavity 17. The cross-section of the movable plate 18 is set in an "I" shape. A sealing ring is glued to one end of the movable plate 18 inside the cavity 17. The movable plate 18 and the cavity 17 are slidably connected. The cleaning pad 19 at the end of the movable plate 18 that extends out of the cavity 17 is initially attached to the straight section 401 on the side of the heat dissipation fin 4. Multiple air vents 21 are evenly distributed on the side of the cavity 17.

[0031] When delivering cold air, the opening of the electric push rod 9 causes the power gear 10 to move up and down reciprocally. This reciprocating movement of the power gear 10 causes the meshing transmission gear 11 to drive the movable tube 702 inserted into the heat sink 3 to rotate. The rotation of the movable tube 702 causes the baffle plate 12 to rotate. The rotation of the baffle plate 12 firstly agitates the coolant inside the heat sink 3, improving its flowability and heat exchange efficiency. Secondly, when the baffle plate 12 rotates... When disc 12 rotates to directly above movable tube 702, disc 12 is open, so it fills with coolant and then detaches from the coolant surface. At this time, the coolant level inside heat sink 3 decreases. When disc 12 rotates completely below the coolant surface inside heat sink 3, the coolant level inside heat sink 3 rises again. Through the intermittent changes in coolant level, buoyancy plate 13 drives lightweight adjustment frame 14 to move up and down reciprocally. The reciprocating movement of lightweight adjustment frame 14 drives... The upright pole 16 moves synchronously. After the upright pole 16 moves back and forth, the cleaning pad 19 on the side of the moving plate 18 can clean the impurities attached to the surface of the heat dissipation fins 4. Secondly, after the upright pole 16 moves, the cleaning pad 19 on the side of the moving plate 18 is released from the protrusion 402 on the heat dissipation fins 4. The arc-shaped protrusion 402 can push and squeeze the cleaning pad 19 and the moving plate 18. When the upright pole 16 moves, the moving plate 18 and the cleaning pad 19 move to the flat section 401. The moving plate 18 is in The built-in spring 20 returns to its original position, thus enabling the reciprocating movement of the moving plate 18. When the moving plate 18 moves toward the inside of the accommodating cavity 17, the accommodating cavity 17 can draw in the airflow around the adjacent heat dissipation fins 4 through the air outlet 21. When the moving plate 18 returns to its original position and moves toward the outside of the accommodating cavity 17, the airflow inside the accommodating cavity 17 will be squeezed outward. By drawing and discharging the airflow, the airflow velocity around the adjacent heat dissipation fins 4 can be increased, preventing heat accumulation around the heat dissipation fins 4 and affecting the heat exchange effect.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oil-immersed transformer with circulating heat dissipation, comprising a transformer body (1) and an insulating terminal (2) mounted on the upper end of the transformer body (1), wherein heat dissipation plates (3) are mounted on the front and rear sides of the transformer body (1), and heat dissipation fins (4) are fixed on the sides of the heat dissipation plates (3), characterized in that: A pump (5) is installed on the right side of the transformer body (1), and one end of the pump (5) is connected to the primary cooling gas box (6) through a pipe. The other end of the pump (5) is connected to the primary cooling gas box (6) through a gas delivery pipe (7) to form a circulating heat dissipation system. The gas delivery pipe (7) passes through the heat dissipation plates (3) on the front and rear sides of the transformer body (1) and the secondary cooling gas box (8) fixed on the left side of the transformer body (1). The cold air inside the secondary cooling gas box (8) is used to cool the gas delivery pipe (7) so that the temperature of the cold source inside the gas delivery pipe (7) is equal before and after.

2. The oil-immersed transformer with circulating heat dissipation according to claim 1, characterized in that: The heat dissipation fins (4) are evenly distributed on the side of the heat dissipation plate (3), and the surface of the heat dissipation fins (4) is provided with a straight section (401) and a protruding section (402), and the protruding section (402) is set as an arc structure.

3. The oil-immersed transformer with circulating heat dissipation according to claim 2, characterized in that: The interior of the heat sink (3) is hollow, and the hollow cavity inside the heat sink (3) is filled with coolant.

4. The oil-immersed transformer with circulating heat dissipation according to claim 3, characterized in that: The gas delivery duct (7) consists of a fixed tube (701) and a movable tube (702), and the movable tube (702) passes through the middle of the heat sink (3). The movable tube (702) can rotate on the fixed tube (701), and a sealing ring is provided at the joint of the movable tube (702) and the fixed tube (701).

5. The oil-immersed transformer with circulating heat dissipation according to claim 4, characterized in that: Multiple baffles (12) are fixed on the active tube (702), and the end of the baffle (12) away from the active tube (702) is set as an open structure, and the opening of the baffle (12) located directly above the active tube (702) can be separated from the coolant inside the heat sink (3).

6. The oil-immersed transformer with circulating heat dissipation according to claim 5, characterized in that: The lower end of the transformer body (1) is fixed with an electric push rod (9), and the telescopic end of the electric push rod (9) is equipped with a power gear frame (10). The side of the power gear frame (10) is meshed with a transmission gear (11) fixed in the middle of the movable tube (702).

7. The oil-immersed transformer with circulating heat dissipation according to claim 6, characterized in that: The heat sink (3) is provided with a buoyancy plate (13) inside, and a lightweight adjustment frame (14) is fixed at the upper end of the buoyancy plate (13). The lightweight adjustment frame (14) is connected to the heat sink (3) through an auxiliary spring (15). A vertical rod (16) is fixed on the lightweight adjustment frame (14), and the vertical rod (16) is located between adjacent heat sink fins (4). A receiving cavity (17) is opened inside the vertical rod (16), and a movable plate (18) is inserted into the receiving cavity (17). A cleaning pad (19) is fixed at one end of the movable plate (18) that extends out of the receiving cavity (17). The movable plates (18) on the left and right sides of the vertical rod (16) are connected to each other through an internal spring (20). An air vent (21) is provided on the side of the receiving cavity (17).

8. The oil-immersed transformer with circulating heat dissipation according to claim 7, characterized in that: The cross-section of the movable plate (18) is set as an "I" shaped structure, and a sealing ring is glued to one end of the movable plate (18) inside the accommodating cavity (17), and the movable plate (18) and the accommodating cavity (17) are slidably connected.

9. An oil-immersed transformer with circulating heat dissipation according to claim 7, characterized in that: The cleaning pad (19) of the movable plate (18) extending out of the accommodating cavity (17) is initially attached to the straight section (401) on the side of the heat dissipation fin (4), and multiple air vents (21) are evenly distributed on the side of the accommodating cavity (17).

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