Heat dissipation mechanism applied to oil-immersed transformer

Abstract

The utility model discloses a heat dissipation mechanism applied to an oil-immersed transformer, which comprises a first sunflower radiator, a second sunflower radiator and a heat pipe, the first sunflower radiator is positioned at the top of a transformer main body, is immersed in transformer oil in the transformer main body and is used for absorbing heat of the transformer oil; the second sunflower radiator is positioned outside the transformer main body and is used for exchanging heat with air so as to dissipate heat; the heat pipe is used for transferring heat and provided with an evaporation section and a condensation section, the evaporation section makes contact with the first sunflower radiator to absorb heat, and the condensation section makes contact with the second sunflower radiator to transfer heat to the second sunflower radiator. According to the heat dissipation mechanism applied to the oil-immersed transformer, the rapid, efficient and stable heat dissipation efficiency can be provided, it is effectively guaranteed that the temperature in the working process of the transformer is stable, the transformer is controlled to work within an effective temperature range, and it is guaranteed that the performance of the transformer cannot be reduced due to the fact that the oil temperature is too high in the working process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil -immersed transformer heat dissipation, especially relates to a heat dissipation mechanism for oil -immersed transformer. BACKGROUND

[0002] The transformer is important equipment of power system, it has important significance to economic transmission, flexible distribution and safe use of electric energy. In our country, due to the rapid economic development, city power load increases sharply, and is influenced by city environment restriction, city land, housing shortage and other factors, the number of transformers cannot be many, leading to the continuous growth of transformer load rate, the phenomenon of transformer over-rating capacity operation and failure rate rise unceasingly, seriously threaten the safety of power grid. Therefore the heat dissipation problem of transformer causes people more and more attention.

[0003] The transformer can be divided into oil -immersed transformer and dry -type transformer, and most of the transformers running on the power grid are oil -immersed transformers at present. The heat generated by the loss of oil -immersed transformer during operation is transferred to the oil tank wall through the heat conduction and convection of transformer oil. The heat dissipation coefficient of transformer oil is about 9~10 times larger than that of air, so the effect of transformer heat dissipation by oil tank wall is not very good, in order to improve its heat dissipation capacity, according to the capacity of transformer, heat dissipation fin or heat pipe radiator can be added outside the oil tank wall, and large transformer should be equipped with radiator or cooler and other devices. At present, the heat dissipation mode applied in oil -immersed transformer with capacity of 50~2500kVA and below mainly adopts natural oil circulation cooling mode. Natural oil circulation is to rely on the temperature difference of transformer oil layer as the circulating power of oil flow, and the circulating principle of oil in transformer is that the transformer oil at the bottom of transformer is heated due to the heat dissipation of iron core and coil, the density of lower transformer oil becomes smaller, and the transformer oil moves upward under the influence of density difference, and the temperature continues to rise. For the traditional oil -immersed transformer, the transformer oil reaches the top and flows into the heat dissipation fin at the upper end of the heat dissipation fin, the heat is dissipated to the air in the fin heat sink, and the outside of the fin heat sink is cooled by air convection and radiation, and the transformer oil with reduced temperature returns to the bottom of the transformer oil tank through the lower port and continues to participate in the circulation.

[0004] However, the conduction efficiency of the fin heat sink is low, that is, the transformer oil is conducted to the heat dissipation fin and then conducted to the air for heat exchange or radiation, even if the heat can be dissipated by increasing the contact area of the heat dissipation fin and air, but due to the slow heat transfer efficiency, it cannot meet the demand of heat dissipation performance, so that the temperature of transformer oil is too high, which causes the performance of transformer to decline, and even causes fire, explosion and other serious accidents. UTILITY MODEL CONTENTS

[0005] The utility model aims at at least solve one of prior art existing technical problems. For this, the utility model provides a kind of heat dissipation mechanism applied to oil-immersed transformer, can provide quick efficient and stable heat dissipation efficiency, effectively ensure the temperature stability in the working process of transformer and control in effective temperature range work, ensure that the performance of transformer during operation will not be reduced due to oil temperature being too high, even cause the occurrence of fire and other safety accidents, while the efficient heat dissipation efficiency can prolong the service life of transformer winding.

[0006] According to the heat dissipation mechanism applied to oil-immersed transformer of the utility model embodiment, including:

[0007] First sunflower radiator, located at the top of transformer main body, immersed in transformer oil in transformer main body, for absorbing the heat of transformer oil;

[0008] Second sunflower radiator, located at the outside of transformer main body, for heat exchange with air to dissipate heat;

[0009] Heat pipe, for transferring heat, with evaporation section and condensation section, the evaporation section is in contact with the first sunflower radiator and absorbs heat, and the condensation section is in contact with the second sunflower radiator to transfer heat to the second sunflower radiator.

[0010] According to the heat dissipation mechanism applied to oil-immersed transformer of the utility model embodiment, at least has following beneficial effects:

[0011] 1. The utility model discloses a first sunflower radiator is arranged at the top of transformer main body, and the first sunflower radiator is immersed in transformer oil in transformer main body, and the first sunflower radiator is used to absorb the heat of transformer oil, can understand, the transformer oil of transformer main body bottom is due to the heat dissipation of iron core and coil and temperature rises, and the density of lower transformer oil becomes small, and transformer oil moves upward under the influence of density difference, and temperature continues to rise, so that the transformer oil of high temperature converges to the top of transformer main body, and the first sunflower radiator is in transformer oil in transformer main body in the top of transformer main body, so that the first sunflower radiator can be in contact with the transformer oil of high temperature in transformer main body, so as to improve the contact area of first sunflower radiator and the transformer oil of high temperature, and it is favorable to improve the heat absorption efficiency of first sunflower radiator to transformer oil.

[0012] 2. The utility model discloses a second sunflower radiator is arranged outside the transformer main body, and the second sunflower radiator is used for heat exchange with air to dissipate heat, and can be understood that the second sunflower radiator is completely exposed outside the transformer main body and contacts with air, thereby increasing the contact area of the second sunflower radiator and air, which is beneficial to improve the heat exchange efficiency of the second sunflower radiator and air, and further improve the heat dissipation effect of the second sunflower radiator.

[0013] 3. The utility model discloses a heat pipe is set up, and the heat pipe is used for transferring heat, and the heat pipe has evaporation section and condensation section, and the evaporation section contacts and absorbs heat with the first sunflower radiator, and the condensation section contacts with the second sunflower radiator to transfer heat to the second sunflower radiator, and can be understood that the evaporation section contacts with the first sunflower radiator to make the evaporation section actively absorb heat of the first sunflower radiator and transfer to the condensation section, and then the condensation section contacts with the second sunflower radiator to transfer heat to the second sunflower radiator, thereby improving the heat transfer efficiency between the first sunflower radiator and the second sunflower radiator.

[0014] 4. The utility model discloses a first sunflower radiator, heat pipe and second sunflower radiator are set up, which is beneficial to improve the heat absorption efficiency, heat transfer efficiency and heat dissipation efficiency of the heat dissipation mechanism for transformer oil, so that the heat dissipation mechanism can provide fast and efficient and stable heat dissipation efficiency, effectively ensure that the temperature is stable during the working process of the transformer and is controlled within the effective temperature range, ensure that the performance of the transformer will not be reduced during the working period due to the excessively high oil temperature, even cause the occurrence of fire and other safety accidents, and the efficient heat dissipation efficiency can prolong the service life of the transformer winding.

[0015] According to some embodiments of the utility model, the length of the second sunflower radiator is greater than the length of the first sunflower radiator.

[0016] Beneficially, the length of the second sunflower radiator is greater than the length of the first sunflower radiator, so that the heat dissipation area of the second sunflower radiator can be greater than the heat absorption area of the first sunflower radiator, and further, the heat dissipation speed of the second sunflower radiator is greater than the heat absorption speed of the first sunflower radiator, avoiding the accumulation of heat in the second sunflower radiator.

[0017] According to some embodiments of the utility model, the first sunflower radiator includes a first pipe part and a plurality of first fins, the first fins are arranged along the radial direction of the first pipe part, and the plurality of first fins are distributed along the circumferential direction of the first pipe part on the outer peripheral wall of the first pipe part.

[0018] Beneficially, the first sunflower radiator includes the first pipe part and the first fins, the first fins are arranged along the radial direction of the first pipe part, and the first fins are distributed on the outer peripheral wall of the first pipe part along the circumferential direction of the first pipe part, so that the heat absorption area of the first sunflower radiator is increased, the heat absorption efficiency of the first sunflower radiator on the transformer oil is improved, and the heat absorbed by the first fin can be collected to the first pipe part.

[0019] According to some embodiments of the present application, the evaporation section penetrates the first pipe part along the axial direction of the first pipe part and is in contact with the inner wall of the first pipe part.

[0020] Beneficially, the evaporation section penetrates the first pipe part along the axial direction of the first pipe part and is in contact with the inner wall of the first pipe part, so that the contact area of the evaporation section and the first sunflower radiator is increased, and the active heat absorption efficiency of the evaporation section on the first sunflower radiator is improved.

[0021] According to some embodiments of the present application, the first sunflower radiator is riveted and fixed on the heat pipe.

[0022] Beneficially, the first sunflower radiator is riveted and fixed on the heat pipe, so that the first sunflower radiator is more stable.

[0023] According to some embodiments of the present application, the second sunflower radiator includes the second pipe part and the second fins, and the second fins are distributed on the outer peripheral wall of the second pipe part along the circumferential direction of the second pipe part.

[0024] Beneficially, the second sunflower radiator includes the second pipe part and the second fins, and the second fins are distributed on the outer peripheral wall of the second pipe part along the circumferential direction of the second pipe part, so that the heat of the second sunflower radiator can be transferred from the second pipe part to the second fins and dissipated through the second fins, the heat dissipation area of the second sunflower radiator is increased, and the heat dissipation efficiency of the second sunflower radiator is improved.

[0025] According to some embodiments of the present application, the condensation section penetrates the second pipe part along the axial direction of the second pipe part and is in contact with the inner wall of the second pipe part.

[0026] Beneficially, the condensation section penetrates the second pipe part along the axial direction of the second pipe part and is in contact with the inner wall of the second pipe part, so that the contact area of the condensation section and the second sunflower radiator is increased, and the heat transfer efficiency of the condensation section to the second sunflower radiator is improved.

[0027] According to some embodiments of the utility model, still include threaded connection spare, threaded connection spare is fixed on the heat pipe, threaded connection spare is connected with the top wall of transformer main body threadedly.

[0028] Beneficially, the threaded connection spare is fixed on the heat pipe, and the threaded connection spare is connected with the top wall of the transformer main body threadedly, so that the heat pipe is conveniently installed and fixed on the transformer main body, and the installation of the heat dissipation mechanism on the transformer main body is more stable.

[0029] According to some embodiments of the utility model, still include several radiating fins, several radiating fins are fixed on the both sides of transformer main body.

[0030] Beneficially, the several radiating fins are fixed on the both sides of the transformer main body, so that the radiating fins can dissipate heat for the transformer main body and the transformer oil in the transformer main body, and the heat dissipation efficiency of the transformer is further improved.

[0031] According to some embodiments of the utility model, the radiating fin has a first oil channel, the first oil channel has an upper port and a lower port, the upper port is communicated with the top of the inner cavity of the transformer main body, the upper port accommodates the transformer oil in the transformer main body to enter the first oil channel, the lower port is communicated with the bottom of the inner cavity of the transformer main body, and the lower port accommodates the transformer oil in the first oil channel to flow back to the transformer main body.

[0032] Beneficially, the radiating fin has the first oil channel, the first oil channel has the upper port and the lower port, the upper port is communicated with the top of the inner cavity of the transformer main body, the upper port accommodates the transformer oil in the transformer main body to enter the first oil channel, the lower port is communicated with the bottom of the inner cavity of the transformer main body, and the lower port accommodates the transformer oil in the first oil channel to flow back to the transformer main body, so that the transformer oil can flow through the inside of the radiating fin, the heat of the transformer oil is dissipated to the air in the radiating fin, the outside of the radiating fin is cooled by air convection and radiation, the transformer oil with reduced temperature flows back to the bottom of the transformer main body through the lower port, and continues to participate in circulation, so that the radiating fin has the effect of cooling the transformer oil.

[0033] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0035] Figure 1 A structure diagram of the heat dissipation mechanism applied to the oil-immersed transformer according to an embodiment of the present application is shown in the figure.

[0036] Figure 2 A Figure 1 A top view is shown in the figure.

[0037] Figure 3 A Figure 2 An A-A sectional view is shown in the figure.

[0038] Figure 4 A Figure 1 A parts explosion diagram of the first sunflower radiator, the second sunflower radiator, the heat pipe and the threaded connecting piece is shown in the figure.

[0039] Reference signs: 100 - first sunflower radiator, 110 - transformer main body, 120 - second sunflower radiator, 130 - heat pipe, 140 - evaporation section, 150 - condensation section, 160 - first pipe part, 170 - first fin, 180 - second pipe part, 190 - second fin, 200 - threaded connecting piece, 210 - heat dissipation fin, 220 - first oil channel, 230 - upper port, 240 - lower port. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0042] In the description of the utility model, if several meanings are one or more, the meaning of multiple is two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number. If there is a description of the first and the second, this is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] In the description of the utility model, it should be pointed out that, unless otherwise expressly specified and limited, the terms "installation, connection and connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0044] In the following, a heat dissipation mechanism applied to oil-immersed transformer according to the embodiment of the utility model is described in combination with the drawings.

[0045] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the utility model aims at providing a kind of heat dissipation mechanism applied to oil-immersed transformer embodiment.

[0046] In the embodiment, a heat dissipation mechanism applied to oil-immersed transformer mainly includes first sunflower radiator 100, second sunflower radiator 120 and heat pipe 130.

[0047] For first sunflower radiator 100, first sunflower radiator 100 is located at the top of transformer main body 110, first sunflower radiator 100 is immersed in transformer oil in transformer main body 110, and first sunflower radiator 100 is used to absorb the heat of transformer oil.

[0048] It can be understood that the temperature of transformer oil at the bottom of transformer main body 110 increases due to the heat dissipation of core and coil, the density of lower transformer oil becomes smaller, and the transformer oil moves upward under the influence of density difference, and the temperature continues to rise, so that the transformer oil with high temperature converges to the top of transformer main body 110, and first sunflower radiator 100 enters the transformer oil in transformer main body 110 at the top of transformer main body 110, so that first sunflower radiator 100 can contact with the transformer oil with high temperature in transformer main body 110, thereby, the contact area of first sunflower radiator 100 and the transformer oil with high temperature is improved, which is beneficial to improve the heat absorption efficiency of first sunflower radiator 100 to transformer oil.

[0049] In some specific embodiments, the first sunflower radiator 100 comprises a first tube portion 160 and a plurality of first fins 170, the plurality of first fins 170 are arranged along the radial direction of the first tube portion 160 and are distributed along the circumferential direction of the first tube portion 160 on the outer circumferential wall of the first tube portion 160, thereby facilitating the increase of the heat absorption area of the first sunflower radiator 100 and the improvement of the heat absorption efficiency of the first sunflower radiator 100 on the transformer oil, and at the same time, the heat absorbed by the first fins 170 can be collected to the first tube portion 160.

[0050] Further, the lower evaporation section 140 penetrates the first tube portion 160 along the axial direction of the first tube portion 160 and is in contact with the inner wall of the first tube portion 160, thereby facilitating the increase of the contact area of the evaporation section 140 with the first sunflower radiator 100, and further, the improvement of the active heat absorption efficiency of the evaporation section 140 on the first sunflower radiator 100.

[0051] In some specific embodiments, the first sunflower radiator 100 is riveted and fixed on the heat pipe 130, thereby making the first sunflower radiator 100 more firm and stable.

[0052] For the second sunflower radiator 120, the second sunflower radiator 120 is located outside the transformer main body 110, and the second sunflower radiator 120 is used for heat exchange with air to dissipate heat.

[0053] It can be understood that the second sunflower radiator 120 is completely exposed outside the transformer main body 110 and in contact with air, thereby increasing the contact area of the second sunflower radiator 120 with air, facilitating the improvement of the heat exchange efficiency of the second sunflower radiator 120 with air, and further, the improvement of the heat dissipation effect of the second sunflower radiator 120.

[0054] In some specific embodiments, the second sunflower radiator 120 comprises a second tube portion 180 and a plurality of second fins 190, the plurality of second fins 190 are distributed along the circumferential direction of the second tube portion 180 on the outer circumferential wall of the second tube portion 180, thereby making the heat of the second sunflower radiator 120 be able to be transferred from the second tube portion 180 to the second fins 190 and dissipated through the second fins 190, facilitating the increase of the heat dissipation area of the second sunflower radiator 120, and further, the improvement of the heat dissipation efficiency of the second sunflower radiator 120.

[0055] Further, the lower condensation section 150 penetrates the second tube portion 180 along the axial direction of the second tube portion 180 and is in contact with the inner wall of the second tube portion 180, thereby facilitating the increase of the contact area of the condensation section 150 with the second sunflower radiator 120, and further, the improvement of the heat transfer efficiency of the condensation section 150 to the second sunflower radiator 120.

[0056] In some specific embodiments, the length of the second sunflower radiator 120 is greater than the length of the first sunflower radiator 100, so that the heat dissipation area of the second sunflower radiator 120 can be greater than the heat absorption area of the first sunflower radiator 100, and then the heat dissipation speed of the second sunflower radiator 120 is greater than the heat absorption speed of the first sunflower radiator 100, avoiding heat accumulation in the second sunflower radiator 120 and unable to dissipate heat in time.

[0057] In some specific embodiments, the second sunflower radiator 120 is fixed on the heat pipe 130 by glue welding.

[0058] For the heat pipe 130, the heat pipe 130 is used to transfer heat, and the heat pipe 130 has an evaporation section 140 and a condensation section 150. The evaporation section 140 is in contact with the first sunflower radiator 100 to absorb heat, and the condensation section 150 is in contact with the second sunflower radiator 120 to transfer heat to the second sunflower radiator 120.

[0059] It can be understood that the evaporation section 140 is in contact with the first sunflower radiator 100 to enable the evaporation section 140 to actively absorb heat from the first sunflower radiator 100 and transfer it to the condensation section 150, and then the condensation section 150 is in contact with the second sunflower radiator 120 to transfer heat to the second sunflower radiator 120, thereby improving the heat transfer efficiency between the first sunflower radiator 100 and the second sunflower radiator 120.

[0060] The embodiment sets the first sunflower radiator 100, the heat pipe 130 and the second sunflower radiator 120, which is conducive to improving the heat absorption efficiency, heat transfer efficiency and heat dissipation efficiency of the heat dissipation mechanism for the transformer oil, so that the heat dissipation mechanism can provide fast, efficient and stable heat dissipation efficiency, effectively ensuring that the temperature during the operation of the transformer is stable and controlled within an effective temperature range, ensuring that the performance of the transformer will not be reduced during operation due to high oil temperature, and even causing a fire and other safety accidents. At the same time, the efficient heat dissipation efficiency can prolong the service life of the transformer winding.

[0061] In some specific embodiments, a threaded connector 200 is further included, the threaded connector 200 is fixed on the heat pipe 130, and the threaded connector 200 is threadedly connected with the top wall of the transformer body 110, so as to facilitate the installation and fixation of the heat pipe 130 on the transformer body 110, and then the installation of the heat dissipation mechanism on the transformer body 110 is more stable.

[0062] Further, the threaded connector 200 can be fixed with the heat pipe 130 by glue welding.

[0063] In some specific embodiments, a plurality of heat dissipation fins 210 are further included, and the plurality of heat dissipation fins 210 are fixed on both sides of the transformer body 110.

[0064] The plurality of heat dissipation fins 210 are fixed on both sides of the transformer body 110, so that the heat dissipation fins 210 can dissipate heat from the transformer body 110 and the transformer oil in the transformer body 110, thereby further improving the heat dissipation efficiency of the transformer.

[0065] Further, the heat dissipation fin 210 has a first oil channel 220, and the first oil channel 220 has an upper port 230 and a lower port 240. The upper port 230 is communicated with the top of the inner cavity of the transformer body 110, and the upper port 230 accommodates the transformer oil in the transformer body 110 into the first oil channel 220. The lower port 240 is communicated with the bottom of the inner cavity of the transformer body 110, and the lower port 240 accommodates the transformer oil in the first oil channel 220 to flow back to the transformer body 110.

[0066] It can be understood that the transformer oil at the bottom of the transformer body 110 rises in temperature to the top and flows into the first oil channel 220 at the upper port 230 of the heat dissipation fin 210, so that the transformer oil can flow through the inside of the heat dissipation fin 210, so that the heat of the transformer oil is dissipated in the heat dissipation fin 210 to the air, the outside of the heat dissipation fin 210 is cooled by air convection and radiation itself, and the transformer oil with reduced temperature flows back to the bottom of the transformer body 110 through the lower port 240, and continues to participate in the circulation, thereby achieving the effect of cooling the transformer oil by the heat dissipation fin 210.

[0067] In some specific embodiments, the heat dissipation fin 210 can be fixed on both sides of the transformer body 110 by welding.

[0068] In the description of the specification, the description of the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples, or some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] The terms "first, second, third, fourth" and the like (if any) in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0070] It is also important to note that the description in this specification uses "for example," "for instance," and "such as" to indicate one or more implementations. These phrases, however, should not be construed as exclusive or exhaustive, unless otherwise expressly specified.

[0071] Furthermore, the terms "comprise" (and grammatical variations thereof) when used in this specification are used to specify the presence of stated features, integers, steps or components but do not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.

[0072] Also, the terms "include", "comprise" or "have" and variations thereof when used in this specification, shall not be construed as excluding the presence of other elements or steps, unless otherwise indicated.

[0073] The above detailed description of the present application has been given with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A heat dissipating mechanism for an oil-immersed transformer, characterized by comprising: The application relates to a transformer cooling device, which comprises: a first sunflower radiator (100) located at the top of a transformer body (110) and immersed in transformer oil in the transformer body (110) to absorb the heat of the transformer oil; a second sunflower radiator (120) located outside the transformer body (110) to exchange heat with air to dissipate heat; a heat pipe (130) for transferring heat, which has an evaporation section (140) in contact with the first sunflower radiator (100) to absorb heat and a condensation section (150) in contact with the second sunflower radiator (120) to transfer heat to the second sunflower radiator (120).

2. The heat dissipating mechanism for use in an oil-immersed transformer according to claim 1, wherein The length of the second sunflower radiator (120) is greater than that of the first sunflower radiator (100).

3. The heat dissipating mechanism for oil immersed transformer as claimed in claim 1 wherein, The first sunflower radiator (100) comprises a first pipe section (160) and a plurality of first fins (170) extending along the radial direction of the first pipe section (160) and distributed along the circumferential direction of the first pipe section (160) on the outer peripheral wall of the first pipe section (160).

4. The heat dissipating mechanism for use in an oil-immersed transformer according to claim 3, wherein The evaporation section (140) penetrates the first pipe section (160) along the axial direction of the first pipe section (160) and is in contact with the inner wall of the first pipe section (160).

5. The heat dissipating mechanism for oil immersed transformer as claimed in claim 1 wherein, The first sunflower radiator (100) is riveted to the heat pipe (130).

6. The heat dissipating mechanism for oil immersed transformer as claimed in claim 1 wherein, The second sunflower radiator (120) comprises a second pipe section (180) and a plurality of second fins (190) distributed along the circumferential direction of the second pipe section (180) on the outer peripheral wall of the second pipe section (180).

7. A heat dissipating mechanism for use in an oil immersed transformer as defined in claim 6, wherein The condensation section (150) penetrates the second pipe section (180) along the axial direction of the second pipe section (180) and is in contact with the inner wall of the second pipe section (180).

8. The heat dissipating mechanism for oil immersed transformer as claimed in claim 1 wherein, The application further comprises a threaded connector (200) fixed to the heat pipe (130) and threaded to the top wall of the transformer body (110).

9. The heat dissipating mechanism for use in an oil immersed transformer as claimed in claim 1, wherein, The application further comprises a plurality of heat dissipation fins (210) fixed to the two sides of the transformer body (110).

10. The heat dissipating mechanism for use in an oil-immersed transformer according to claim 9, wherein The heat dissipation fin (210) has a first oil channel (220) with an upper port (230) and a lower port (240), the upper port (230) is communicated with the top of the inner cavity of the transformer body (110), the upper port (230) allows the transformer oil in the transformer body (110) to enter the first oil channel (220), and the lower port (240) is communicated with the bottom of the inner cavity of the transformer body (110) and allows the transformer oil in the first oil channel (220) to flow back to the transformer body (110).

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