Transformer and cooling mechanism thereof

Abstract

The invention belongs to the field of cooling of transformers, and particularly provides a transformer and a cooling mechanism thereof. The cooling mechanism comprises a cooling box, the cooling box is provided with an inlet and an outlet which are communicated with a cavity in the cooling box and allow cooling liquid to flow in and out respectively, the cooling box is further connected with a heat dissipation device, the heat dissipation device comprises at least one heat dissipation plate, a heat dissipation flow channel allowing the cooling liquid to flow circularly is arranged in the heat dissipation plate, and the heat dissipation flow channel is provided with a liquid inlet and a liquid outlet. The liquid inlet is communicated with an outlet of the cooling box, the liquid outlet is communicated with an inlet of the cooling box, and the cavity in the cooling box is further communicated with a negative pressure generating device so that negative pressure can be formed in the cavity in the cooling box. The transformer comprises the cooling mechanism. According to the transformer disclosed by the invention, the cooling mechanism is additionally provided with the heat dissipation plate which can circularly flow with the cooling liquid in the cooling box and can effectively dissipate heat of the cooling liquid in the circular flowing process, so that the cooling liquid is kept at a relatively low temperature, and the heat dissipation and cooling effects of the transformer are further improved.

Description

Technical Field

[0001] The invention belongs to the field of transformer cooling, and in particular relates to a transformer and a cooling mechanism thereof. Background Art

[0002] During the operation of the transformer, its internal components generate heat due to work, causing the temperature to gradually rise. This temperature rise phenomenon may cause problems such as equipment damage. To solve this problem, a cooling mechanism is usually installed on the transformer to achieve effective temperature control.

[0003] At present, conventional cooling mechanisms include water cooling and air cooling. The water cooling mechanism of the water cooling method generally includes a water tank, which stores cooling water inside and is used to be attached to the side wall of the transformer to exchange heat with the transformer. In order to dissipate the heat in the water tank to the outside and avoid overheating of the cooling water, the prior art also has a method of adding heat sinks to the side wall of the water tank, but the water in the water tank is static, and the actual heat dissipation effect is poor.

[0004] After searching, among the related technologies, the utility model patent with the authorization announcement number CN209708793U discloses a forced circulation cooling type electric furnace transformer, the cooling mechanism of which includes a cooling water tank, which can be attached to the outer wall of the transformer (body), wherein the cooling water tank is provided with a wellhead and an outlet. In addition, the cooling mechanism also includes a circulation pump and a water tank, the water tank is connected to the inlet and outlet of the cooling water tank through a pipeline, the circulation pump is connected to the inlet of the cooling water tank, after starting the circulation pump, the water in the water tank can circulate in the cooling water tank, which can improve the heat dissipation effect of the cooling water in the cooling water tank to a certain extent.

[0005] However, in the above technical solution, the "hot water" in the cooling water tank will be stored in the water tank after circulating into the water tank, and cannot be effectively dissipated. There is still a risk of overheating of the cooling water after long-term use. In other words, the heat dissipation capacity of the water-cooling mechanism of the transformer still needs to be further improved. Summary of the invention

[0006] The object of the present invention is to provide a cooling mechanism for a transformer to solve the technical problem that the cooling effect of the cooling mechanism for the transformer in the prior art is insufficient. The object of the present invention is also to provide a transformer to solve the same technical problem.

[0007] To achieve the above object, the technical solution of the cooling mechanism of the transformer provided by the present invention is: A cooling mechanism for a transformer comprises a cooling box which is attached to a side wall of a transformer body to exchange heat with the transformer body. The cooling box is provided with an inlet and an outlet which are connected to a cavity inside the cooling box and for cooling liquid to enter and flow out respectively. The cooling box is also connected to a heat dissipation device, which comprises at least one heat dissipation plate. The heat dissipation plate has a heat dissipation flow channel inside for circulating cooling liquid. The heat dissipation flow channel has a liquid inlet and a liquid outlet. The liquid inlet is connected to the outlet of the cooling box, and the liquid outlet is connected to the inlet of the cooling box. The cavity inside the cooling box is also connected to a negative pressure generating device so that the cavity inside the cooling box forms a negative pressure.

[0008] As a further improvement, the heat dissipation device includes a mounting frame, and a plurality of heat dissipation plates are arranged at intervals and are perpendicular to the cooling box, and each heat dissipation plate is connected to the cooling box via the mounting frame.

[0009] As a further improvement, the inlet and outlet on the cooling box are consistent with the number of the heat sinks, and are correspondingly connected to the liquid inlet and liquid outlet of each heat sink.

[0010] As a further improvement, an auxiliary heat sink is connected between two adjacent heat sinks. The auxiliary heat sink is in a zigzag or wave shape with multiple crests and troughs, and each crest and trough is in heat exchange contact with the two adjacent heat sinks.

[0011] As a further improvement, two rows of mounting seats are fixed on the mounting frame, which are respectively located at the upper and lower ends of the auxiliary heat sink. Each row of mounting seats is installed at intervals along the arrangement direction of the heat sink, and the intervals between the mounting seats and the mounting frame and between two adjacent mounting seats are provided for the corresponding insertion of the heat sink. The mounting seats are provided with slots, and each auxiliary heat sink is inserted into the slot accordingly.

[0012] As a further improvement, an elastic pushing member is also installed on the mounting seat to release the auxiliary heat sink and the heat sink after they are inserted.

[0013] As a further improvement, the heat dissipation channel is a serpentine channel.

[0014] As a further improvement, the heat sink is formed by sealing and splicing two split plates, and each split plate is provided with a flow channel groove to form a heat dissipation flow channel.

[0015] As a further improvement, the negative pressure generating device includes an outer cylinder, inside which is installed a piston which can move axially along the outer cylinder, one end of the piston is connected to a screw, one end of the outer cylinder is provided with a plug, the screw and the plug are threadedly connected to drive the piston to move by rotating the screw, and the cavity inside the outer cylinder is connected to the cooling box through a connecting pipe.

[0016] The present invention belongs to an improved invention creation, and its beneficial effect is: the cooling mechanism in the present invention is additionally configured with a heat sink that can circulate with the coolant inside the cooling box and can effectively dissipate heat from the coolant during the circulation process. Specifically, the cooling box can fit the transformer body to dissipate heat from the transformer body, and the negative pressure generating device is controlled to form a negative pressure inside the cooling box, generating a siphon effect, and the "hot coolant (water)" in the cooling box can circulate in the heat dissipation flow channel inside the heat sink and the cooling box. The coolant can dissipate heat outward when flowing in the heat dissipation flow channel, so that the coolant maintains a relatively low temperature, thereby improving the heat dissipation and cooling effect of the transformer.

[0017] To achieve the above purpose, the technical solution of the transformer provided by the present invention is: A transformer comprises a transformer body and a cooling mechanism for dissipating heat from the transformer body, the cooling mechanism comprising a cooling box attached to the side wall of the transformer body for heat exchange with the transformer body, the cooling box being provided with an inlet and an outlet which are connected to a cavity inside the cooling box and for respectively allowing coolant to enter and flow out, the cooling box being further connected with a heat dissipation device, the heat dissipation device comprising at least one heat dissipation plate, the heat dissipation plate having a heat dissipation flow channel inside for circulating coolant, the heat dissipation flow channel having a liquid inlet and a liquid outlet, the liquid inlet being connected to the outlet of the cooling box, the liquid outlet being connected to the inlet of the cooling box, the cavity inside the cooling box being further connected with a negative pressure generating device so that negative pressure is formed in the cavity inside the cooling box.

[0018] As a further improvement, the heat dissipation device includes a mounting frame, and a plurality of heat dissipation plates are arranged at intervals and are perpendicular to the cooling box, and each heat dissipation plate is connected to the cooling box via the mounting frame.

[0019] As a further improvement, the inlet and outlet on the cooling box are consistent with the number of the heat sinks, and are correspondingly connected to the liquid inlet and liquid outlet of each heat sink.

[0020] As a further improvement, an auxiliary heat sink is connected between two adjacent heat sinks. The auxiliary heat sink is in a zigzag or wave shape with multiple crests and troughs, and each crest and trough is in heat exchange contact with the two adjacent heat sinks.

[0021] As a further improvement, two rows of mounting seats are fixed on the mounting frame, which are respectively located at the upper and lower ends of the auxiliary heat sink. Each row of mounting seats is installed at intervals along the arrangement direction of the heat sink, and the intervals between the mounting seats and the mounting frame and between two adjacent mounting seats are provided for the corresponding insertion of the heat sink. The mounting seats are provided with slots, and each auxiliary heat sink is inserted into the slot accordingly.

[0022] As a further improvement, an elastic pushing member is also installed on the mounting seat to release the corresponding pushing force on the auxiliary heat sink and the heat sink after the auxiliary heat sink and the heat sink are inserted into the slot.

[0023] As a further improvement, the heat dissipation channel is a serpentine channel.

[0024] As a further improvement, the heat sink is formed by sealing and splicing two split plates, and each split plate is provided with a flow channel groove to form a heat dissipation flow channel.

[0025] As a further improvement, the negative pressure generating device includes an outer cylinder, inside which is installed a piston which can move axially along the outer cylinder, one end of the piston is connected to a screw, one end of the outer cylinder is provided with a plug, the screw and the plug are threadedly connected to drive the piston to move by rotating the screw, and the cavity inside the outer cylinder is connected to the cooling box through a connecting pipe.

[0026] The present invention belongs to an improved invention creation, and its beneficial effect is: the transformer in the present invention is additionally configured with a heat sink in its cooling mechanism, which can circulate with the coolant inside the cooling box and can effectively dissipate heat from the coolant during the circulation process. Specifically, the cooling box can be attached to the transformer body to dissipate heat from the transformer body, and the negative pressure generating device is controlled to form a negative pressure inside the cooling box, thereby generating a siphon effect. The "hot coolant (water)" in the cooling box can circulate in the heat dissipation flow channel inside the heat sink and the cooling box. The coolant can dissipate heat outward when flowing in the heat dissipation flow channel, so that the coolant maintains a relatively low temperature, thereby improving the heat dissipation and cooling effect of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a transformer embodiment of the present invention; Figure 2 is a schematic structural diagram of a cooling mechanism in a transformer embodiment of the present invention; Figure 3 is a cross-sectional view of a cooling box of a cooling mechanism in an embodiment of a transformer in the present invention; Figure 4 A cross-sectional view showing the positions of the heat sink and the mounting frame of the cooling mechanism in the transformer embodiment of the present invention; Figure 5 for Figure 4 A partial enlarged view of the middle A; Figure 6 It is a schematic structural diagram of a heat sink of a cooling mechanism in an embodiment of a transformer in the present invention; Figure 7 is a cross-sectional view of a heat sink of a cooling mechanism in an embodiment of a transformer of the present invention; Figure 8 It is a structural schematic diagram of a first split plate of a heat sink of a cooling mechanism in an embodiment of a transformer in the present invention; Fig. 9 It is a structural schematic diagram of a second split plate of a heat sink of a cooling mechanism in an embodiment of a transformer in the present invention; Fig.10It is a structural schematic diagram of an auxiliary heat sink of a cooling mechanism in an embodiment of a transformer in the present invention; Fig.11 It is a schematic structural diagram of a mounting base of a cooling mechanism in an embodiment of a transformer in the present invention.

[0028] Description of reference numerals: 1. Transformer body; 2. Cooling box; 3. Mounting frame; 4. Auxiliary heat sink; 5. First split plate; 6. Second split plate; 7. Mounting seat; 8. Outer cylinder; 11. Fixed seat; 12. Through groove; 13. Top plate; 14. Hanging plate; 15. Insulating sleeve; 21. Inlet; 22. Outlet; 41. Auxiliary heat sink; 42. First groove; 51. First flow channel groove; 52. Second groove; 61. Second flow channel groove; 71. First push member; 72. Second push member; 73. Elastic member; 74. Elastic member mounting groove; 75. Slot; 81. Connecting pipe; 82. Piston; 83. Screw; 84. Plug. DETAILED DESCRIPTION

[0029] In order to provide a transformer with better cooling and heat dissipation effect, the basic technical concept of the present invention is to add a heat dissipation plate in the cooling mechanism, which can circulate with the coolant inside the cooling box and can effectively dissipate heat from the coolant during the circulation process, so that the coolant can be kept at a lower temperature. Based on the above concept, the present invention is further described in detail in combination with the embodiments below.

[0030] The specific embodiment of the transformer provided by the present invention is as follows: The transformer provided in this embodiment is as follows Figure 1 As shown, it includes a transformer body 1, and the internal structure of the transformer body 1 can be consistent with the prior art, including an iron core, a coil, a terminal, an insulating sleeve 15, etc. A top plate 13 is provided at the top of the transformer body 1, and two hanging plates 14 are provided on the top plate 13. When installing the transformer body 1, two fixing seats 11 can be used, and the lifting equipment is connected through the hanging plates 14 to lift the transformer body 1 and place it on the fixing seat 11. A through slot 12 is provided on the fixing seat 11, and a fastener can be used to pass through the through slot 12 to fix the transformer body 1 and the fixing seat 11. The relevant structures of the transformer body 1 not mentioned above can all adopt the prior art, and the cooling mechanism of the transformer is mainly described in detail below.

[0031] As a basic embodiment, the cooling mechanism includes a cooling box 2, which is attached to the side wall of the transformer body 1 to exchange heat with the transformer body 1. According to the actual spatial layout, the cooling box 2 can be connected to one side wall of the transformer body 1, or to more than two side walls. Figure 1The figure shows an example in which cooling boxes 2 are mounted on opposite side walls of the transformer body 1. The cavity inside the cooling box 2 can be used to store coolant, wherein the coolant is generally water. Of course, the possibility of using cooling oil or compound coolant is not completely excluded.

[0032] like Figure 1-Figure 3 As shown, the cooling box 2 is connected to a heat dissipation device, which can dissipate heat for the coolant in the cooling box 2. Most basically, the heat dissipation device should include a heat sink, and the heat sink has a heat dissipation channel for the circulation of the coolant. In order to ensure that the liquid in the cooling box 2 can circulate in the heat sink and the cooling box 2, naturally, the heat sink has a liquid inlet and a liquid outlet, and the cooling box 2 has an inlet 21 and an outlet 22, wherein the inlet 21 is at the top and the outlet 22 is at the bottom. The inlet 21 of the cooling box 2 is for the coolant to enter the cavity inside the cooling box 2, and the outlet 22 of the cooling box 2 is for the coolant to flow out of the cavity inside the cooling box 2. The liquid inlet of the heat sink is connected to the outlet 22 of the cooling box 2, and the liquid outlet is connected to the inlet 21 of the cooling box 2. The coolant flowing out of the outlet 22 of the cooling box 2 can enter the heat dissipation channel inside the heat sink from the liquid inlet of the heat sink, and after completing the heat dissipation cycle inside the heat dissipation channel, it flows into the cooling box 2 from the inlet 21 of the cooling box 2. In actual use, the coolant level stored in the cooling box 2 should be lower than the inlet 21. The above-mentioned communication positions can be connected by corresponding pipelines to achieve communication.

[0033] In order to realize the circulation of the coolant between the heat sink and the cooling box 2, the cavity inside the cooling box 2 is also connected to a negative pressure generating device, and the function of the negative pressure generating device is to form a negative pressure in the cavity inside the cooling box 2, thereby generating a siphon effect, so that the coolant can circulate. Accordingly, a connecting pipe 81 can be used to connect the negative pressure generating device with the cavity inside the cooling box 2.

[0034] Different from the prior art, the coolant in this embodiment can dissipate heat on the heat sink during the circulation process, so that the coolant is kept at a relatively low temperature, which naturally improves the cooling effect of the transformer.

[0035] As a preferred embodiment, the heat dissipation device connected to the cooling box 2 further includes a mounting frame 3, and a plurality of heat dissipation plates (six in the figure) are arranged at intervals, and the heat dissipation plates are perpendicular to the cooling box 2. Each heat dissipation plate is connected to the cooling box 2 through the mounting frame 3. Compared with the other embodiments in which the heat dissipation plates are arranged parallel to the cooling box 2, in this preferred embodiment, on the one hand, a longer heat dissipation channel can be formed, and on the other hand, both sides of the heat dissipation plate (the space between two adjacent heat dissipation plates) can also dissipate heat efficiently, further improving the heat dissipation effect.

[0036] More preferably, to ensure efficient flow of the coolant, the number of inlets 21 for the coolant to enter and outlets 22 for the coolant to flow out on the cooling box 2 is consistent with the number of heat sinks, and the inlet 21 and outlet 22 of the cooling box 2 are correspondingly connected to the liquid inlet and outlet of each heat sink. Compared with other embodiments, the inlet 21 and outlet 22 of each heat sink are first collected into the same manifold, and then connected to the inlet 21 and outlet 22 of the cooling box 2 through the manifold, in this case, each heat sink is actually directly connected to the cooling box 2, so that the coolant can flow efficiently.

[0037] As a more preferred embodiment, an auxiliary heat sink 4 is connected between two adjacent heat sinks. Specifically, Figure 2 , Figure 4 , Figure 5 and Fig.10 As shown, the auxiliary heat sink 4 can be a continuous thin plate structure, that is, an auxiliary heat sink 41, which is a broken line with multiple peaks and troughs as a whole, and the positions of each peak and trough are in heat exchange contact with two adjacent heat sinks respectively. The heat of the heat exchange plate can be dissipated outwardly through the auxiliary heat sink 4, further improving the heat dissipation effect. It should be noted that the figure shows an example of a situation in which the auxiliary heat sink 4 is a broken line with multiple peaks and troughs. Those skilled in the art can understand that the auxiliary heat sink 4 can also be a wavy structure with multiple peaks and troughs.

[0038] In an optional embodiment, the auxiliary heat sink 4 and each heat sink can be connected to the mounting frame 3. Specifically, Figure 2 , Figure 4 , Figure 5 and Fig.11 As shown, two rows of mounting seats 7 respectively located at the upper and lower ends of the auxiliary heat sink 4 are fixed on the mounting frame 3, and each row of mounting seats 7 is arranged and installed at intervals along the arrangement direction of the heat sink, and the intervals between the mounting seats 7 and the mounting frame 3 and between two adjacent mounting seats 7 are for the heat sink to be inserted correspondingly, and the mounting seats 7 are provided with slots 75, and each auxiliary heat sink 4 is correspondingly inserted into the slots 75. Compared with the method of installing and connecting the auxiliary heat sink 4 and the heat sink in other ways (such as welding), this "plug-in" installation method of the auxiliary heat sink 4 and the heat sink is more convenient to operate.

[0039] Furthermore, if Figure 2 , Figure 4-Figure 6 and Figure 10-11 As shown, an elastic push piece is also installed on the mounting seat 7 to release the auxiliary heat sink 4 and the heat sink after the auxiliary heat sink 4 and the heat sink are inserted. As a specific embodiment, Figure 5As shown, the pushing member for pushing the auxiliary heat sink 4 can be defined as a first pushing member 71, and the pushing member for pushing the heat sink can be defined as a second pushing member 72. An elastic member 73 (which can be a compression spring) is provided at one end of each pushing member away from the auxiliary heat sink 4 or heat sink it pushes, and a receiving hole or receiving groove is provided at a corresponding position on the mounting seat 7. The receiving hole or receiving groove can also be used to place the elastic member, forming an elastic member mounting groove 74. When the auxiliary heat sink 4 and the heat sink are inserted, the corresponding pushing member can compress the elastic member 73 after being pressed, and each retreats into the corresponding receiving hole or receiving groove, and after the auxiliary heat sink 4 and the heat sink are inserted into place, the auxiliary heat sink 4 and the heat sink are released after being inserted to press the auxiliary heat sink 4 and the heat sink. After the auxiliary heat sink 4 and the heat sink are inserted, the pushing members release the pressing of the auxiliary heat sink 4 and the heat sink, thereby pressing the auxiliary heat sink 4 and the heat sink to keep them in the corresponding positions. Correspondingly, the auxiliary heat sink 4 and the heat sink plate may also be provided with corresponding grooves which cooperate with the pushing members when the pushing members are pressed, namely, the first groove 42 and the second groove 52 respectively.

[0040] It should be added that, in other embodiments, the pushing member and the elastic member 73 may be arranged in other forms. For example, the elastic member 73 may also be a tension spring. The two ends of the tension spring are respectively connected to the pushing member and the mounting seat 7 to ensure that the direction of release of its elastic force enables the pushing member to press the auxiliary heat sink 4 and the heat sink.

[0041] Of course, those skilled in the art will appreciate that in other embodiments, the elastic push piece may not be used. For example, the heat sink plate and the auxiliary heat sink 4 and the corresponding insertion positions may be interference fits with a small interference amount, or the auxiliary heat sink 4 and the heat sink plate may be maintained in a relatively fixed position.

[0042] As a preferred embodiment to make the heat dissipation channel longer, Figure 8 and Fig. 9 As shown, the heat dissipation channel can be a serpentine channel.

[0043] As a preferred embodiment for convenient manufacturing, Figure 6-Figure 9 As shown, the heat sink is composed of two split plates, specifically a first split plate 5 and a second split plate 6, which are sealed and spliced ​​together. The first split plate 5 is provided with a first flow channel groove 51, and the second split plate 6 is provided with a second flow channel groove 61. The first flow channel groove 51 and the second flow channel groove 61 are spliced ​​together to form a heat dissipation channel. Specifically, the two split plates can be welded, and the weld position can be directly sealed, or a sealing ring can be set between the two split plates, and fasteners are used to fasten the two split plates together. Compared with the direct casting solution, the heat sink of this structure is more convenient to manufacture.

[0044] As a preferred embodiment with higher reliability and suitable for outdoor environment, Figure 1-Figure 3 As shown, the negative pressure generating device is a manual device, which has higher reliability than an electric pump. Specifically, the negative pressure generating device includes an outer cylinder 8, inside which is mounted a piston 82 that can move axially along the outer cylinder 8, one end of the piston 82 is connected to a screw 83, one end of the outer cylinder 8 is provided with a plug 84, the screw 83 is threadedly connected to the plug 84, so that the piston 82 is driven to move by rotating the screw 83, and the cavity inside the outer cylinder 8 is connected to the cooling box 2 through a connecting pipe 81. In actual use, as shown in FIG. Figure 3 As shown, the screw rod 83 can be rotated to move to the left, so that the volume of the space on the right side of the piston 82 increases, and a negative pressure is formed in the cooling box 2, so that the coolant circulates stably.

[0045] It should be added that the figure shows an example of a situation where heat exchange is connected to the heat dissipation device only on one side of the cooling box 2. In other embodiments, according to actual needs, heat exchange can be connected to the heat dissipation device on both sides or even more sides of the cooling box 2, which has a better heat dissipation effect.

[0046] Specific embodiments of the cooling mechanism of the transformer in the present invention: The cooling mechanism of the transformer has the same structure as the cooling mechanism described in the above transformer embodiment and will not be described in detail here.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooling mechanism for a transformer, comprising a cooling box for attaching to the side wall of a transformer body to exchange heat with the transformer body, the cooling box being provided with an inlet and an outlet communicating with the cavity inside the cooling box and for allowing a coolant to enter and flow out respectively, wherein: The cooling box is also connected to a heat dissipation device, which includes at least one heat dissipation plate. The heat dissipation plate has a heat dissipation channel for circulating coolant. The heat dissipation channel has a liquid inlet and a liquid outlet. The liquid inlet is connected to the outlet of the cooling box, and the liquid outlet is connected to the inlet of the cooling box. The cavity inside the cooling box is also connected to a negative pressure generating device to form a negative pressure in the cavity inside the cooling box.

2. The transformer cooling mechanism according to claim 1, characterized in that: The heat dissipation device comprises a mounting frame, and a plurality of heat dissipation plates are arranged at intervals and are all perpendicular to the cooling box, and each heat dissipation plate is connected to the cooling box through the mounting frame.

3. The transformer cooling mechanism according to claim 2, characterized in that: The inlet and outlet on the cooling box are consistent with the number of the heat sinks, and are correspondingly connected to the liquid inlet and liquid outlet of each heat sink.

4. The transformer cooling mechanism according to claim 2 or 3, characterized in that: An auxiliary heat sink is connected between two adjacent heat sinks. The auxiliary heat sink is in a zigzag or wave shape with multiple crests and troughs, and each crest and trough is in heat exchange contact with the two adjacent heat sinks.

5. The transformer cooling mechanism according to claim 4, characterized in that: Two rows of mounting seats are fixed on the mounting frame, which are respectively located at the upper and lower ends of the auxiliary heat sink. Each row of mounting seats is installed at intervals along the arrangement direction of the heat sink, and the intervals between the mounting seats and the mounting frame and between two adjacent mounting seats are for the heat sink to be inserted accordingly. The mounting seats are provided with slots, and each auxiliary heat sink is inserted into the slot accordingly.

6. The transformer cooling mechanism according to claim 5, characterized in that: The mounting seat is also provided with an elastic pushing member, so as to release the pushing force on the auxiliary heat sink and the heat sink after the auxiliary heat sink and the heat sink are inserted.

7. The transformer cooling mechanism according to any one of claims 1 to 3, characterized in that: The heat dissipation channel is a serpentine channel.

8. The transformer cooling mechanism according to any one of claims 1 to 3, characterized in that: The heat sink is formed by sealing and splicing two split plates, and each split plate is provided with a flow channel groove to form a heat dissipation flow channel.

9. The transformer cooling mechanism according to any one of claims 1 to 3, characterized in that: The negative pressure generating device includes an outer cylinder, inside which is installed a piston which can move axially along the outer cylinder, one end of the piston is connected to a screw, one end of the outer cylinder is provided with a plug, the screw and the plug are threadedly connected to drive the piston to move by rotating the screw, and the cavity inside the outer cylinder is connected to the cooling box through a connecting pipe.

10. A transformer, comprising a transformer body and a cooling mechanism for dissipating heat from the transformer body, characterized in that: The cooling mechanism is the cooling mechanism of the transformer in any one of claims 1-9.

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