Oil-immersed transformer with circulating heat dissipation

Abstract

The application 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 insulating terminal installed on the upper end of the transformer body. Heat dissipation plates are installed on the front and back sides of the transformer body, and heat dissipation fins are fixed to the side edges of the heat dissipation plates. One end of a pump machine is connected with a first-stage refrigeration air tank through a pipeline, and the other end of the pump machine is connected with the first-stage refrigeration air tank through a gas conveying pipeline, so that a circulating heat dissipation system is formed. The gas conveying pipeline passes through the heat dissipation plates on the front and back sides of the transformer body and a second-stage refrigeration air tank fixed to the left side of the transformer body in sequence. The circulating heat dissipation oil-immersed transformer can exchange heat with the heat of the transformer through the cold source circulated and conveyed in the cooling pipeline. A second-stage cooling component is arranged in the middle section of the cooling pipeline. The heat exchange effect of the cold source in the latter half section is equal to that of the cold source in the former half section by cooling the cold source in the cooling pipeline in the middle section.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to an oil-immersed transformer with circulating heat dissipation. BACKGROUND

[0002] As the core equipment of the power system, the oil-immersed transformer is widely used in power transmission and distribution, new energy power generation and industrial fields. Its core function is to realize voltage conversion through electromagnetic induction principle, and rely on insulating oil to realize heat dissipation and insulation protection.

[0003] The Chinese patent with the patent application name of "Water-cooled special transformer" and the publication date of "2024-11-01" includes a water-cooled box fixed on the top of the transformer body, the front and rear sides of the transformer body are respectively provided with the same specification of heat-conducting copper pipes, the two heat-conducting copper pipes are respectively communicated with the inside of the water-cooled box, the left and right sides of the transformer body are integrally connected with heat dissipation fins, the inside of the water-cooled box is provided with a serpentine buffer transition pipe, one end of the serpentine buffer transition pipe is communicated with one of the heat-conducting copper pipes through a first connecting pipe, and the other end is communicated with the other heat-conducting copper pipe through a first connecting pipe of the same specification.

[0004] The existing transformer in the prior art has the following technical problems: in order to improve the heat dissipation and cooling effect of the existing transformer in use, a cooling pipeline is arranged, and heat exchange and cooling are performed by using the cold source in the cold gas pipeline. However, as the cold source flows, the temperature of the cold source in the first half will rise after heat exchange, and the cooling effect in the second half will be less than that in the first half after heat exchange and cooling.

[0005] Therefore, the present application provides an oil-immersed transformer with circulating heat dissipation to solve the above problems. SUMMARY

[0006] The present application aims to provide an oil-immersed transformer with circulating heat dissipation to solve the above problems in the background art. The existing transformer in the market is used to improve the heat dissipation and cooling effect by arranging a cooling pipeline and using the cold source in the cold gas pipeline 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 the cooling effect in the second half will be less than that in the first half after heat exchange and cooling.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a circulating heat dissipation oil immersed transformer, comprising a transformer body and an insulating terminal installed on the upper end of the transformer body, heat dissipation plates are installed on the front and back sides of the transformer body, and heat dissipation fins are fixed on the side edges 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 with a first refrigeration gas tank through a pipeline, the other end of the pump is connected with the first refrigeration gas tank through a gas conveying pipeline, forming a circulating heat dissipation system, the gas conveying pipeline passes through the heat dissipation plates on the front and back sides of the transformer body and a second refrigeration gas tank fixed on the left side of the transformer body in sequence, and the cold gas in the second refrigeration gas tank is used for cooling the gas conveying pipeline, so that the temperature of the cold source in the gas conveying pipeline is equalized.

[0008] Preferably, the heat dissipation fins are uniformly distributed on the side of the heat dissipation plate, and the surface of the heat dissipation fin is provided with a flat section and a convex section, and the convex section is provided in an arc structure.

[0009] By adopting the above technical scheme, the contact area with the external air can be increased by the flat section and the convex section on the surface of the heat dissipation fin, and the heat exchange effect of the transformer body can be improved.

[0010] Preferably, the inside of the heat dissipation plate is provided in a hollow structure, and the hollow cavity in the heat dissipation plate is filled with cooling liquid.

[0011] By adopting the above technical scheme, the cooling liquid in the heat dissipation plate can be used for heat exchange with the heat dissipation plate, and the heat dissipation and cooling effect of the transformer body can be improved.

[0012] Preferably, the gas conveying pipeline is composed of a fixed pipe and a movable pipe, the movable pipe passes through the middle part of the heat dissipation plate, the movable pipe can rotate on the fixed pipe, and a sealing ring is arranged at the joint of the movable pipe and the fixed pipe.

[0013] By adopting the above technical scheme, the sealing property of the joint of the movable pipe and the fixed pipe can be improved by the sealing ring at the joint.

[0014] Preferably, a plurality of turbulence discs are fixed on the movable pipe, the end of the turbulence disc away from the movable pipe is provided in an open structure, and the opening of the turbulence disc located directly above the movable pipe can be separated from the cooling liquid in the heat dissipation plate.

[0015] By adopting the above technical scheme, the turbulence discs can rotate synchronously by the rotation of the movable pipe, so that the cooling liquid in the heat dissipation plate can be stirred, the heat exchange effect of the cooling liquid can be improved, and the turbulence disc located directly above the movable pipe can be separated from the cooling liquid, so that part of the cooling liquid can be contained in the turbulence disc, and the liquid level of the cooling liquid in the heat dissipation plate can be changed.

[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.

[0025] 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.

[0026] 2、Set with two refrigeration gas tank, pump machine can open the cold air flow inside the first refrigeration gas tank, and through the gas pipeline transmission, the cold flow in the gas pipeline can pass through the heat sink, the cold flow in the gas pipeline can be heat exchange with the cooling liquid in the heat sink to ensure that the cooling liquid is in a low temperature state after a period of use, and the gas pipeline also passes through the second refrigeration gas tank, which can be used to cool the gas pipeline after the first heat exchange, so that the temperature of the cold air flow in the gas pipeline and the temperature of the air flow in the first half are equal;

[0027] 3、Set with a spoiler, the rotation of the spoiler can first stir the cooling liquid in the heat sink, improve the flowability of the cooling liquid in the heat sink, and make the heat exchange efficiency higher, and the rotation of the spoiler can change the liquid level of the cooling liquid in the heat sink, so that the vertical rod drives the moving plate to move up and down, and the moving plate can clean the impurities attached to the surface of the heat sink fin through the up and down reciprocating movement of the moving plate, and the moving plate can be moved in the accommodating cavity through the contact and separation of the moving plate and the cleaning rubber pad and the convex section, and the moving plate can suck and discharge the external air flow through the air outlet through the movement of the moving plate in the accommodating cavity, thereby accelerating the air flow speed around the adjacent heat sink fin, preventing the slow air flow speed from causing heat accumulation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front perspective structure diagram of the present application;

[0029] Figure 2 is a structure diagram of the gas pipeline and the second refrigeration gas tank of the present application;

[0030] Figure 3 is a structure diagram of the electric push rod and the power tooth rack of the present application;

[0031] Figure 4 is a structure diagram of the straight section and the convex section of the present application;

[0032] Figure 5 is a structure diagram of the light adjusting frame and the vertical rod of the present application;

[0033] Figure 6 is a structure diagram of the present application Figure 5 is an enlarged structure diagram of A in the present application;

[0034] Figure 7 is a structure diagram of the movable pipe and the spoiler of the present application;

[0035] Figure 8 is a structure diagram of the vertical rod and the moving plate of the present application;

[0036] Figure 9 The structure diagram of the accommodating cavity and the air outlet hole of the present application.

[0037] In the figure: 1, transformer body; 2, insulating terminal; 3, heat dissipation plate; 4, heat dissipation fin; 401, flat section; 402, convex section; 5, pump; 6, first-stage refrigeration gas tank; 7, gas conveying pipe; 701, fixed pipe; 702, movable pipe; 8, second-stage refrigeration gas tank; 9, electric push rod; 10, power tooth holder; 11, transmission gear; 12, spoiler disc; 13, buoyancy plate; 14, light weight adjusting frame; 15, auxiliary spring; 16, vertical rod; 17, accommodating cavity; 18, moving plate; 19, cleaning rubber pad; 20, built-in spring; 21, air outlet hole. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] Embodiment one: please refer to Figures 1-9, in order to improve the heat dissipation effect of the existing transformer in use, the cooling pipeline is set to utilize the cold source inside the cold air pipeline for heat exchange and cooling. However, with the flow of the cold source, the temperature of the cold source in the first half will rise after heat exchange. The cooling effect of the second half is inferior to that of the first half. In order to solve the technical problem, the embodiment discloses the following technical content. A circulating heat dissipation oil immersed transformer, comprising a transformer body 1 and an insulating terminal 2 installed on the upper end of the transformer body 1, heat dissipation plates 3 are installed on the front and back of the transformer body 1, and heat dissipation fins 4 are fixed on the side of the heat dissipation plates 3, a pump 5 is installed on the right side of the transformer body 1, one end of the pump 5 is connected with a first refrigeration air tank 6 through a pipeline, the other end of the pump 5 is connected with the first refrigeration air tank 6 through a gas conveying pipe 7, forming a circulating heat dissipation system, the gas conveying pipe 7 passes through the heat dissipation plates 3 on the front and back of the transformer body 1 and a second refrigeration air tank 8 fixed on the left side of the transformer body 1 in sequence, the cold air inside the second refrigeration air tank 8 is used for cooling the gas conveying pipe 7, so that the temperature of the cold source inside the gas conveying pipe 7 is equal before and after, the heat dissipation fins 4 are uniformly distributed on the side of the heat dissipation plates 3, and the surface of the heat dissipation fins 4 is provided with a flat section 401 and a convex section 402, the convex section 402 is provided in an arc shape, the inside of the heat dissipation plate 3 is provided in a hollow structure, and the hollow cavity in the heat dissipation plate 3 is filled with cooling liquid, the gas conveying pipe 7 is composed of a fixed pipe 701 and a movable pipe 702, and the movable pipe 702 passes through the middle part of the heat dissipation plate 3.

[0040] When the transformer body 1 works, the heat generated by the work of the transformer body 1 can be absorbed by the heat dissipation plates 3 and the heat dissipation fins 4. The heat dissipation plates 3 are filled with cooling liquid, which can exchange heat with the heat dissipation plates 3 and the heat dissipation fins 4 through the cooling liquid and the outside air, thereby reducing the temperature of the transformer body 1. At the same time, the pump 5 is started. After the pump 5 is started, the cold air flow in the first refrigeration air tank 6 can be sucked and transmitted through the gas conveying pipe 7. The cold flow transmitted in the gas conveying pipe 7 can pass through the heat dissipation plates 3. The cold flow in the gas conveying pipe 7 can exchange heat with the cooling liquid in the heat dissipation plates 3, thereby ensuring that the cooling liquid remains in a low temperature state after a period of use. The gas conveying pipe 7 also passes through the second refrigeration air tank 8. The second refrigeration air tank 8 can be used to cool the gas conveying pipe 7 after the first half of the heat exchange, thereby ensuring that the temperature of the cold air flow in the gas conveying pipe 7 is equal to that in the first half during the second half of the heat exchange. The surface of the heat dissipation fins 4 is provided with a flat section 401 and a convex section 402. Through the arrangement of the flat section 401 and the convex section 402, the contact area of the heat dissipation fins 4 with the outside air can be increased, and the overall heat exchange effect can be improved.

[0041] 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 2-9 As 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.

[0042] When the cold air flow is conveyed, the opening of the electric push rod 9 can make the power rack 10 move up and down reciprocatingly, the reciprocating movement of the power rack 10 can make the transmission gear 11 connected in mesh drive the movable pipe 702 inserted into the heat dissipation plate 3 rotate, the rotation of the movable pipe 702 can make the turbulence disc 12 rotate, the rotation of the turbulence disc 12 can first agitate the cooling liquid in the heat dissipation plate 3, improve the flowability of the cooling liquid in the heat dissipation plate 3, make the heat exchange efficiency higher, and then, when the turbulence disc 12 rotates to the upper of the movable pipe 702, the turbulence disc 12 is provided with an opening, so the turbulence disc 12 will contain the cooling liquid and be separated from the liquid level of the cooling liquid, at this time, the liquid level of the cooling liquid in the heat dissipation plate 3 is lowered, when the turbulence disc 12 rotates to the lower of the liquid level of the cooling liquid in the heat dissipation plate 3, the liquid level of the cooling liquid in the heat dissipation plate 3 is raised again, through the intermittent change of the liquid level of the cooling liquid, the buoyancy plate 13 can drive the light adjusting frame 14 move up and down reciprocatingly, the reciprocating movement of the light adjusting frame 14 can drive the vertical rod 16 move synchronously, the reciprocating movement of the vertical rod 16 can make the cleaning rubber pad 19 on the side of the moving plate 18 clean the impurities attached to the surface of the heat dissipation fin 4, secondly, when the vertical rod 16 moves, the cleaning rubber pad 19 on the side of the moving plate 18 is separated from the convex section 402 on the heat dissipation fin 4, the convex section 402 can push and extrude the cleaning rubber pad 19 and the moving plate 18, when the vertical rod 16 moves, the moving plate 18 and the cleaning rubber pad 19 move to the flat section 401, the moving plate 18 resets and rebounds under the action of the built-in spring 20, thereby realizing the reciprocating movement of the moving plate 18, when the moving plate 18 moves to the inside of the containing cavity 17, the containing cavity 17 can suck the air flow around the adjacent heat dissipation fin 4 through the air outlet hole 21, when the moving plate 18 resets and moves to the outside of the containing cavity 17, the air flow in the containing cavity 17 is extruded outward again, through the suction and discharge of the air flow, the air flow speed around the adjacent heat dissipation fin 4 can be improved, and the heat accumulation around the heat dissipation fin 4 can be prevented, so as to affect the heat exchange effect.

[0043] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0044] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

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). The secondary cooling gas box (8) is located in the middle section of the gas delivery pipe (7) to make the temperature of the cold source inside the gas delivery pipe (7) equal before and after. The heat sink (3) has a hollow interior, and the hollow cavity inside the heat sink (3) is filled with coolant. The air 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 between the movable tube (702) and the fixed tube (701). Multiple baffles are fixed on the movable tube (702). (12), 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). 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 (10). The side of the power gear (10) is meshed with a transmission gear (11) fixed in the middle of the active tube (702).

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 1, 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).

4. The oil-immersed transformer with circulating heat dissipation according to claim 3, 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.

5. The oil-immersed transformer with circulating heat dissipation according to claim 4, 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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