Efficient radiator for transformer

Abstract

The efficient radiator for the transformer comprises an oil inlet pipe and an oil return pipe. Wind direction self-adaptive heat dissipation modules are arranged between the oil inlet pipe and the return pipe in groups; the wind direction self-adaptive heat dissipation module comprises an oil distribution box, an oil collection box and a group of heat dissipation pipe plates arranged between the oil distribution box and the oil collection box; the radiating tube plate comprises a plate-shaped main body, an oil distribution box connecting tube shaft and an oil gathering box connecting tube shaft; radiating fins are arranged on the surface of the plate-shaped main body in groups; the oil distribution box connecting pipe shaft is rotationally connected with the oil distribution box; and the oil gathering box connecting pipe shaft is rotationally connected with the oil gathering box. According to the efficient radiator for the transformer, by arranging the specific wind direction self-adaptive radiating module, the posture can be automatically adjusted under the action of natural wind power, the air flowing resistance is reduced, and the heat exchange efficiency is improved. In addition, the plate-shaped main body of the heat dissipation pipe plate and the heat dissipation fins are of an integrated structure made of aluminum alloy, contact heat resistance does not exist between the plate-shaped main body and the heat dissipation fins, the heat dissipation performance is further improved, and light weight is achieved.

Description

Technical Field

[0001] The present invention relates to a heat exchanger for the power field, and particularly to an efficient radiator for a transformer. Background Art

[0002] Currently, large transformers usually use finned radiators to solve the heat dissipation problem. However, affected by factors such as structure and material, for traditional finned radiators, under the ONAN (oil-immersed self-cooling) condition, when the average oil temperature rise is 50K, the heat dissipation efficiency is not high, resulting in a relatively large volume, occupying a large lateral space of the transformer, and having a relatively high cost. With the increase in the voltage level and capacity of main transformers for power transmission and transformation, how to improve the heat dissipation efficiency of radiators, reduce the occupied space, and lower the cost is an issue that needs to be solved in the product upgrading.

[0003] Due to the influence of its structure, the air flow between the fins of the finned radiator for a transformer in the prior art is not smooth, which is an important reason for its low heat dissipation efficiency. Chinese patent document CN118762904A discloses a finned radiator for a transformer, in which a flow disturbance component is provided. During operation, the transformer oil inside the inlet pipe acts on the surface of the driving blade when flowing, and the driving blade is forced to drive the third rotating shaft to rotate. Then, through the gear mechanism, the second rotating shaft and the first rotating shaft are driven to rotate. When the third rotating shaft rotates, it drives the first flow disturbance blade to rotate. After the second rotating shaft is driven, it drives the third flow disturbance blade to rotate, and when the first rotating shaft rotates, it drives the second flow disturbance blade to rotate. The first flow disturbance blade, the second flow disturbance blade, and the third flow disturbance blade play a role in disturbing the hot air between the fins, effectively avoiding the problem that the heat dissipation effect of the fins is not ideal due to the accumulation of hot air between the fins. However, this finned radiator has a complex structure, which is not conducive to cost control. Moreover, during operation, the first rotating shaft, the second rotating shaft, and the third rotating shaft are always in a rotating state. Considering the high-temperature factor, it is easy to cause the problem of seal failure at the rotating connection part. In addition, when this finned radiator operates, the flow disturbance blades are driven by the transformer oil, which will increase the load of the transformer oil pump, resulting in an increase in the energy consumption of the transformer oil pump and being not energy-saving and environmentally friendly enough. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides an efficient radiator for a transformer. The efficient radiator for a transformer of the present invention is provided with a specific wind direction adaptive heat dissipation module, in which the heat dissipation tube plate can rotate. Under the action of natural wind, it can automatically adjust its posture to reduce the air flow resistance, improve the heat exchange efficiency, and thus achieve efficient heat dissipation of the transformer. Under the condition of the same heat dissipation capacity, the volume of the efficient radiator for a transformer of the present invention can be made smaller, thus occupying less space, and the use of production materials can be reduced, which is beneficial to cost control; at the same time, the structure adopted in the present invention has high reliability and has advantages in terms of energy conservation and environmental protection. In addition, in the present invention, the plate-shaped main body of the heat dissipation tube plate and the heat dissipation fins are an integrated structure made of aluminum alloy, and there is no contact thermal resistance between the two, which further improves the heat dissipation performance and achieves lightweight.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] An efficient radiator for a transformer, comprising an oil inlet pipe and an oil return pipe; an oil inlet flange for connecting a transformer oil tank and an oil outlet flange are respectively provided on the oil inlet pipe and the oil return pipe; a group of wind direction adaptive heat dissipation modules are arranged between the oil inlet pipe and the oil return pipe; the wind direction adaptive heat dissipation module includes an oil distribution box, an oil collection box, and a group of heat dissipation tube plates arranged between the oil distribution box and the oil collection box; the oil distribution box is communicated with the oil inlet pipe, and the oil collection box is communicated with the oil outlet pipe; an oil flow channel is provided inside the heat dissipation tube plate, and both ends of the oil flow channel are respectively communicated with the oil distribution box and the oil collection box; the heat dissipation tube plate includes a plate-shaped main body, and an oil distribution box connecting pipe shaft and an oil collection box connecting pipe shaft respectively arranged at both ends of the plate-shaped main body; heat dissipation fins are arranged in groups on the surface of the plate-shaped main body; the oil distribution box connecting pipe shaft is rotatably connected to the oil distribution box and is sealed by a sealing structure; the oil collection box connecting pipe shaft is rotatably connected to the oil collection box and is sealed by a sealing structure.

[0007] Compared with the prior art, in the present invention, specific wind-direction adaptive heat dissipation modules are arranged in groups between the oil inlet pipe and the oil return pipe. During operation, since the heat dissipation tube plate in the wind-direction adaptive heat dissipation module can rotate, under the action of wind force, it will automatically adjust the angle to reduce wind resistance, thereby making the air circulation smoother, and further improving the heat exchange efficiency between the transformer oil inside the heat dissipation tube plate and the outside air. Under the condition of the same heat dissipation capacity, the volume of the high-efficiency radiator for transformers of the present invention can be made smaller, thus occupying less space, and the use of production materials can be reduced, which is beneficial to cost control. At the same time, after the heat dissipation tube plate of the wind-direction adaptive heat dissipation module is adjusted in place under the action of wind force, it is in a static state instead of rotating for a long time. The sealing structure at the rotating connection part is not likely to fail, and the reliability is relatively high. Moreover, due to the high heat exchange efficiency of the radiator of the present invention, the flow rate of the transformer oil can be appropriately reduced during operation, the load of the oil pump can be reduced, and the energy consumption can be reduced, which has advantages in terms of energy conservation and environmental protection.

[0008] As an optimization, in the high-efficiency radiator for transformers described above, the oil distribution box connecting pipe shaft is rotationally connected to the oil distribution box through an oil seal bearing; the oil collecting box connecting pipe shaft is rotationally connected to the oil collecting box through an oil seal bearing. Using an oil seal bearing can not only achieve rotational connection but also achieve a reliable sealing effect, and the oil seal bearing can be directly purchased, which is easy to implement and beneficial to cost control.

[0009] As an optimization, in the high-efficiency radiator for transformers described above, the heat dissipation fins are inclined relative to the horizontal direction, and the inner side is higher than the outer side. Thus, during operation, after the air near the heat dissipation fins absorbs heat and warms up, the inclined heat dissipation fins play a guiding role, enabling the hot air to move obliquely upward along the heat dissipation fins and quickly flow to the top of the transformer. The air circulation speed is faster and the heat exchange efficiency is higher. Further, the inclination angle of the heat dissipation fins relative to the horizontal direction is preferably 40° - 75°.

[0010] As an optimization, in the high-efficiency radiator for transformers described above, the plate-shaped main body and the heat dissipation fins are an integrated structure made of aluminum alloy. Thus, not only is the weight reduced, but there is no contact thermal resistance between the plate-shaped main body and the heat dissipation fins. Coupled with the good thermal conductivity of the aluminum alloy material itself, the heat dissipation tube plate can quickly transfer heat to the air, thereby further improving the heat dissipation efficiency.

[0011] As an optimization, in the high-efficiency radiator for transformers described above, in the wind-direction adaptive heat dissipation module, the distance between adjacent two heat dissipation tube plates satisfies that adjacent heat dissipation tube plates do not interfere with each other. Thus, it is possible to avoid jamming and / or damage caused by the interference between adjacent two heat dissipation tube plates, and the allowable rotation angle of the heat dissipation tube plate is also maximized.

[0012] As an optimization, in the above-mentioned high-efficiency radiator for transformers, an oil outlet connecting pipe shaft is provided on the oil inlet pipe, and the oil distribution box is rotatably connected to the oil outlet connecting pipe shaft and sealed by a sealing structure; an oil return connecting pipe shaft is provided on the oil return pipe, and the oil collecting box is rotatably connected to the oil return connecting pipe shaft and sealed by a sealing structure. Thus, the oil distribution box and the oil collecting box can also rotate under the action of wind force to achieve angle adjustment, reducing the air flow resistance at the top and bottom of the radiator and further improving the heat exchange efficiency.

[0013] As an optimization, in the above-mentioned high-efficiency radiator for transformers, the oil distribution box is rotatably connected to the oil outlet connecting pipe shaft through an oil seal bearing; the oil collecting box is rotatably connected to the oil return connecting pipe shaft through an oil seal bearing. With this design, the functional requirements can be met, and it has high reliability and is easy to implement.

[0014] As an optimization, the above-mentioned high-efficiency radiator for transformers further includes a set of limiting devices; the limiting devices prevent adjacent wind direction adaptive heat dissipation modules from interfering with each other. The limiting devices prevent adjacent wind direction adaptive heat dissipation modules from interfering with each other, which can avoid damage caused by impact and is more suitable for use in areas with strong natural winds.

[0015] As an optimization, in the above-mentioned high-efficiency radiator for transformers, the limiting device includes an A mounting arm, a B mounting arm, and a limiting rod; the A mounting arm is provided on the oil inlet pipe, the B mounting arm is provided on the oil return pipe, and both ends of the limiting rod are respectively connected to the A mounting arm and the B mounting arm. With this structural design of the limiting device, it is easy to implement, beneficial to cost control, and has high reliability.

[0016] As an optimization, in the above-mentioned high-efficiency radiator for transformers, long oval holes are respectively provided on the A mounting arm and the B mounting arm; the limiting rod is fixedly connected to the A mounting arm and the B mounting arm through bolts passing through the long oval holes. Thus, the angular range allowed for the rotation of the oil distribution box and the oil collecting box can be controlled by adjusting the installation position of the limiting rod to meet the usage requirements in different regions. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the high-efficiency radiator for transformers according to an embodiment of the present invention;

[0018] Figure 2 is a front view of the high-efficiency radiator for transformers according to an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of the wind direction adaptive heat dissipation module according to an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of the heat dissipation tube plate according to an embodiment of the present invention.

[0021] Reference signs in the drawings: 1 - inlet oil pipe, 101 - inlet oil pipe flange, 102 - outlet connection pipe shaft; 2 - return oil pipe, 201 - outlet oil pipe flange, 202 - return oil connection pipe shaft; 3 - oil separation box; 4 - oil collection box; 5 - heat dissipation tube plate, 501 - plate-shaped main body, 502 - oil separation box connection pipe shaft, 503 - oil collection box connection pipe shaft, 504 - heat dissipation fins; 6 - limiting device, 601 - A mounting arm 601, 602 - B mounting arm, 603 - limiting rod. Detailed implementation manners

[0022] The present invention will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present invention. In the following embodiments, the content not described in detail is common technical knowledge in the art or can be achieved by conventional technical means in the art.

[0023] Embodiment (see Figures 1 - 4 )

[0024] An efficient radiator for a transformer includes an inlet oil pipe 1 and a return oil pipe 2; inlet oil pipe flanges 101 for connecting to a transformer oil tank and outlet oil pipe flanges 201 are respectively provided on the inlet oil pipe 1 and the return oil pipe 2; a wind direction adaptive heat dissipation module is provided in groups between the inlet oil pipe 1 and the return pipe 2; the wind direction adaptive heat dissipation module includes an oil separation box 3, an oil collection box 4, and a group of heat dissipation tube plates 5 provided between the oil separation box 3 and the oil collection box 4; the oil separation box 3 is communicated with the inlet oil pipe 1, and the oil collection box 4 is communicated with the outlet oil pipe 2; an oil flow channel is provided inside the heat dissipation tube plate 5, and both ends of the oil flow channel are respectively communicated with the oil separation box 3 and the oil collection box 4; the heat dissipation tube plate 5 includes a plate-shaped main body 501, and an oil separation box connection pipe shaft 502 and an oil collection box connection pipe shaft 503 respectively provided at both ends of the plate-shaped main body 501; heat dissipation fins 504 are provided in groups on the surface of the plate-shaped main body 501; the oil separation box connection pipe shaft 502 is rotatably connected to the oil separation box 3 and sealed by a sealing structure; the oil collection box connection pipe shaft 503 is rotatably connected to the oil collection box 4 and sealed by a sealing structure. During operation, the wind force of natural wind acts on the heat dissipation tube plate 5, so that the heat dissipation tube plate 5 automatically adjusts its circumferential attitude to adapt to the natural wind direction, resulting in small air flow resistance and relatively fast air flow speed, realizing efficient heat dissipation. Since the heat dissipation tube plate 5 can automatically adjust its circumferential attitude according to the wind direction, it can always maintain high heat dissipation capacity.

[0025] In the embodiment, the oil separation box connection pipe shaft 502 is rotatably connected to the oil separation box 3 through an oil seal bearing; the oil collection box connection pipe shaft 503 is rotatably connected to the oil collection box 4 through an oil seal bearing. The oil seal bearing can meet the functional requirements, and at the same time has a high degree of technical maturity, can be directly purchased, has high reliability, and is easy to implement.

[0026] In an embodiment, the heat dissipation fins 504 are inclined relative to the horizontal direction, with the inner side higher than the outer side. When the natural wind is weak or there is no obvious natural wind, the air absorbs heat, its temperature rises, and its density decreases. Due to the inclined arrangement of the heat dissipation fins 504, the hot air will flow upward along the heat dissipation fins 504. The inclined heat dissipation fins 504 play a guiding role, making the air flow faster and achieving a better heat exchange effect. When the natural wind is strong, the guiding role of the heat dissipation fins 504 can change the direction of the wind, making the wind flow obliquely upward, reducing the wind resistance, and enabling the wind to flow out from the top of the radiator more quickly, which also has the effect of improving the heat exchange effect. Specifically, the inclination angle of the heat dissipation fins 504 relative to the horizontal direction is 45°.

[0027] In an embodiment, the plate-shaped main body 501 and the heat dissipation fins 504 are an integrated structure made of aluminum alloy material. There is no contact thermal resistance between the plate-shaped main body 501 and the heat dissipation fins 504. Coupled with the good heat conduction ability of the aluminum alloy material itself, the heat dissipation performance is further improved. Moreover, using aluminum alloy material can play a role in lightening the weight and significantly reduce the weight of the product. Specifically, in the embodiment, the heat dissipation fins 504 are formed by a milling process.

[0028] In an embodiment, in the wind direction adaptive heat dissipation module, the distance between two adjacent heat dissipation tube plates 5 satisfies that adjacent heat dissipation tube plates 5 do not interfere with each other. During operation, the rotation range of the heat dissipation tube plate 5 is not restricted and is completely determined by the natural wind, and there will be no jamming and / or damage due to interference.

[0029] In an embodiment, an oil outlet connection tube shaft 102 is provided on the oil inlet pipe 1. The oil distribution box 3 is rotatably connected to the oil outlet connection tube shaft 102 and sealed by a sealing structure; an oil return connection tube shaft 202 is provided on the oil return pipe 2. The oil collection box 4 is rotatably connected to the oil return connection tube shaft 202 and sealed by a sealing structure. During operation, the entire wind direction adaptive heat dissipation module will rotate under the action of the wind force to adapt to the wind direction, making the air flow at the bottom and top of the radiator smoother and further improving the heat exchange effect.

[0030] In an embodiment, the oil distribution box 3 is rotatably connected to the oil outlet connection tube shaft 102 through an oil seal bearing; the oil collection box 4 is rotatably connected to the oil return connection tube shaft 202 through an oil seal bearing. The oil seal bearing can meet the functional requirements, and at the same time, it has a high technical maturity, can be directly purchased, has high reliability, and is easy to implement.

[0031] In an embodiment, the high-efficiency radiator for a transformer further includes a group of limiting devices 6; the limiting devices 6 prevent interference between adjacent wind-direction adaptive heat dissipation modules. Specifically, in the embodiment, a pair of limiting devices 6 are provided between adjacent wind-direction adaptive heat dissipation modules, and the two limiting devices 6 are respectively located on both sides of the oil inlet pipe 1. The setting of the limiting devices 6 can prevent interference between adjacent wind-direction adaptive heat dissipation modules and cause losses.

[0032] In an embodiment, the limiting device 6 includes an A mounting arm 601, a B mounting arm 602, and a limiting rod 603; the A mounting arm 601 is arranged on the oil inlet pipe 1, the B mounting arm 602 is arranged on the oil return pipe 2, and both ends of the limiting rod 603 are connected to the A mounting arm 601 and the B mounting arm 602 respectively. During operation, the mounting arm 602 has a limiting effect on the oil distribution box 3 and the oil collecting box 4, so that adjacent wind-direction adaptive heat dissipation modules do not interfere with each other.

[0033] In an embodiment, long oval holes are respectively provided on the A mounting arm 601 and the B mounting arm 602; the limiting rod 603 is fixedly connected to the A mounting arm 601 and the B mounting arm 602 through bolts passing through the long oval holes. If a larger rotation range is required for the wind-direction adaptive heat dissipation module, the installation position of the limiting rod 603 can be adjusted outwards, and vice versa. For areas with strong natural wind, the rotation range of the wind-direction adaptive heat dissipation module can be adjusted to be smaller to avoid damage to relevant parts due to excessive impact force. For areas with relatively weak natural wind, the rotation range of the wind-direction adaptive heat dissipation module can be adjusted to be larger so that it can better adapt to the wind direction and obtain a higher heat exchange efficiency.

[0034] During operation, the hot oil in the transformer oil tank flows into the oil inlet pipe 1 of the radiator under the action of the oil pump, then sequentially passes through the shunt box 3, the heat dissipation tube plate 5, and the confluence box 4, and then flows into the oil outlet pipe 2, and finally returns to the transformer oil tank to achieve a circulating flow. The transformer oil dissipates heat into the air in the radiator to achieve the cooling purpose.

[0035] The above general description of the invention involved in this application and the description of its specific embodiments should not be understood as a limitation on the technical solution of the invention. Those skilled in the art can, based on the disclosure of this application, without departing from the constituent elements of the invention involved, add, subtract, or combine the disclosed technical features in the above general description or / and specific embodiments (including embodiments) to form other technical solutions within the protection scope of this application.

Claims

1. High-efficiency radiator for transformer, comprising an inlet oil pipe (1) and a return oil pipe (2); inlet oil pipe flanges (101) and outlet oil pipe flanges (201) for connecting the transformer oil tank are respectively provided on the inlet oil pipe (1) and the return oil pipe (2); It is characterized in that: A wind-direction adaptive heat dissipation module is provided in groups between the inlet oil pipe (1) and the return oil pipe (2); the wind-direction adaptive heat dissipation module includes an oil distribution box (3), an oil collection box (4), and a group of heat dissipation tube plates (5) provided between the oil distribution box (3) and the oil collection box (4); the oil distribution box (3) is communicated with the inlet oil pipe (1), and the oil collection box (4) is communicated with the outlet oil pipe (2); an oil flow channel is provided inside the heat dissipation tube plate (5), and both ends of the oil flow channel are respectively communicated with the oil distribution box (3) and the oil collection box (4); the heat dissipation tube plate (5) includes a plate-shaped main body (501), and an oil distribution box connecting pipe shaft (502) and an oil collection box connecting pipe shaft (503) respectively provided at both ends of the plate-shaped main body (501); heat dissipation fins (504) are provided in groups on the surface of the plate-shaped main body (501); the oil distribution box connecting pipe shaft (502) is rotatably connected with the oil distribution box (3) and sealed by a sealing structure; the oil collection box connecting pipe shaft (503) is rotatably connected with the oil collection box (4) and sealed by a sealing structure.

2. The high-efficiency radiator for a transformer according to claim 1, characterized in that: The oil distribution box connecting pipe shaft (502) is rotatably connected with the oil distribution box (3) through an oil seal bearing; the oil collection box connecting pipe shaft (503) is rotatably connected with the oil collection box (4) through an oil seal bearing.

3. The high-efficiency radiator for a transformer according to claim 1, characterized in that: The heat dissipation fins (504) are inclined relative to the horizontal direction, and the inner side is higher than the outer side.

4. The high-efficiency radiator for a transformer according to claim 1, characterized in that: The plate-shaped main body (501) and the heat dissipation fins (504) are an integrated structure made of aluminum alloy material.

5. The high-efficiency radiator for a transformer according to claim 1, wherein: In the wind-direction adaptive heat dissipation module, the distance between adjacent two heat dissipation tube plates (5) satisfies that adjacent heat dissipation tube plates (5) do not interfere with each other.

6. The high-efficiency radiator for a transformer according to any one of claims 1-5, characterized in that: An outlet oil connecting pipe shaft (102) is provided on the inlet oil pipe (1), the oil distribution box (3) is rotatably connected with the outlet oil connecting pipe shaft (102) and sealed by a sealing structure; a return oil connecting pipe shaft (202) is provided on the return oil pipe (2), and the oil collection box (4) is rotatably connected with the return oil connecting pipe shaft (202) and sealed by a sealing structure.

7. The high-efficiency radiator for transformers according to claim 6, characterized in that: The oil distribution box (3) is rotatably connected with the outlet oil connecting pipe shaft (102) through an oil seal bearing; the oil collection box (4) is rotatably connected with the return oil connecting pipe shaft (202) through an oil seal bearing.

8. The high-efficiency radiator for a transformer according to claim 6, wherein: It also includes a group of limiting devices (6); the limiting devices (6) prevent adjacent two wind-direction adaptive heat dissipation modules from interfering with each other.

9. The high-efficiency radiator for a transformer according to claim 8, wherein: The limiting device (6) includes an A mounting arm (601), a B mounting arm (602), and a limiting rod (603); the A mounting arm (601) is provided on the inlet oil pipe (1), the B mounting arm (602) is provided on the return oil pipe (2), and both ends of the limiting rod (603) are respectively connected with the A mounting arm (601) and the B mounting arm (602).

10. The high-efficiency radiator for a transformer according to claim 9, characterized in that: The A mounting arm (601) and the B mounting arm (602) are respectively provided with oblong holes; the limiting rod (603) is fixedly connected to the A mounting arm (601) and the B mounting arm (602) by bolts passing through the oblong holes.

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