Dry-type transformer

Abstract

The utility model discloses a dry -type transformer, a dry -type transformer, including the protection case, the protection case is swinged to be connected with the door, install transformer body in the protection case, and transformer body includes the insulating sleeve, and the insulating sleeve is equipped with the iron core and the coil, still be provided with cooling assembly in the protection case, cooling assembly includes the fixed frame and the cold air tank, the insulating sleeve is fixedly connected with the insulating block, the one end fixedly connected in the fixed frame away from the insulating sleeve of insulating block, install the fan that is matched with the insulating sleeve on the fixed frame, the first water pipe is fixedly connected on the cold air tank, a plurality of first fin is fixedly connected on the first water pipe. The utility model discloses a dry -type transformer can heat dissipation to the iron core and the coil in the insulating sleeve, reduce the temperature when dry -type transformer operation, thereby reduce the loss of electric energy, delay the aging process of the iron core and the coil, improve the service life of dry -type transformer.

Description

Technical Field

[0001] This utility model belongs to the field of power equipment technology, and specifically relates to a dry-type transformer. Background Technology

[0002] Dry-type transformers are mainly used for voltage level conversion, transforming high-voltage electricity into low-voltage electricity suitable for various electrical equipment, thus serving as voltage step-up or step-down transformers. Dry-type transformers are primarily used in buildings and densely populated areas, and their oil-free design reduces the risk of leakage.

[0003] In practical use, since dry-type transformers do not use insulating oil as a cooling medium, their heat dissipation capacity is relatively weak. The existing heat dissipation method is usually to install a fan on the protective box to circulate the air inside the protective box. Although this can achieve a certain degree of heat dissipation, this method cannot effectively dissipate heat from the iron core and coil inside the insulating sleeve. When the dry-type transformer is running, the iron core and coil inside the insulating sleeve often have excessively high temperatures. This not only leads to greater power loss when the dry-type transformer is working, but also accelerates the aging process of the iron core and coil inside the insulating sleeve, shortening the service life of the dry-type transformer.

[0004] Therefore, it is necessary to provide a dry-type transformer to address the aforementioned technical problems.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a dry-type transformer that can solve the above-mentioned problems.

[0007] To achieve the above objectives, a specific embodiment of this utility model provides a dry-type transformer, including a protective box with a door rotatably connected to it. A transformer body is installed inside the protective box, and the transformer body includes an insulating sleeve containing an iron core and a coil. A cooling assembly is also provided inside the protective box, comprising a mounting frame and a cooling box. An insulating block is fixedly connected to the insulating sleeve, with one end of the insulating block away from the insulating sleeve fixedly connected to the mounting frame. A fan matching the insulating sleeve is installed on the mounting frame. A first water pipe is fixedly connected to the cooling box, and multiple first fins are fixedly connected to the first water pipe. Coolant flows inside the first water pipe, and the fan draws air from the first water pipe when it operates.

[0008] In one or more embodiments of this utility model, the cooling assembly further includes a water storage tank, a water pump is fixedly installed on the water storage tank, a second water pipe is fixedly connected to the water pump, the two ends of the second water pipe are respectively fixedly connected to the water storage tank and the first water pipe, a third water pipe is fixedly connected to the end of the first water pipe away from the second water pipe, and the end of the third water pipe away from the first water pipe is fixedly connected to the water storage tank.

[0009] In one or more embodiments of this utility model, a connecting tube matching the insulating sleeve is fixedly connected to the fixing frame.

[0010] In one or more embodiments of this utility model, the water storage tank is fixedly connected to the rear panel of the protective box, and a plurality of second fins are fixedly connected to the water storage tank, the second fins penetrating the rear panel of the protective box.

[0011] In one or more embodiments of this utility model, the cold air box is provided with a plurality of air inlets, and the box door is provided with a first ventilation slot that matches the air inlets.

[0012] In one or more embodiments of this utility model, the air inlet is located on the lower side of the cold air box.

[0013] In one or more embodiments of this utility model, the protective box is provided with a plurality of second ventilation slots, which are higher than the insulating sleeve.

[0014] In one or more embodiments of this utility model, a box cap is fixedly connected to the protective box.

[0015] In one or more embodiments of this utility model, the fixing frame is provided with a slot that matches the fan, and a dustproof net is inserted into the slot.

[0016] In one or more embodiments of this utility model, a fixing plate is fixedly connected to the dustproof net, and the fixing plate is a magnetic plate.

[0017] Compared with the prior art, the dry-type transformer of this utility model can dissipate heat from the iron core and coil inside the insulation sleeve, reduce the operating temperature of the dry-type transformer, thereby reducing power loss, delaying the aging process of the iron core and coil, and improving the service life of the dry-type transformer. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a dry-type transformer in one embodiment of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a dry-type transformer in one embodiment of the present invention. Figure 2 ;

[0021] Figure 3 This is a cross-sectional view of a dry-type transformer according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a cooling assembly for a dry-type transformer according to one embodiment of the present invention. Figure 1 ;

[0023] Figure 5 This is a cross-sectional view of a cooling assembly for a dry-type transformer according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of a dry-type transformer in one embodiment of the present invention. Figure 2 .

[0025] Explanation of key figure labels:

[0026] 1. Protective box; 11. Box door; 111. First ventilation slot; 12. Box cap; 13. Second ventilation slot; 14. Insulating sleeve; 141. Insulating block; 2. Cooling assembly; 21. Fixing frame; 211. Connecting pipe; 212. Fan; 213. Dustproof net; 2131. Fixing plate; 214. Slot; 22. Cold air box; 221. Air inlet; 23. First water pipe; 231. First fin; 24. Water tank; 241. Second fin; 25. Water pump; 26. Second water pipe; 27. Third water pipe. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] like Figures 1 to 6As shown, a dry-type transformer according to one embodiment of this utility model includes a protective box 1, with a door 11 rotatably connected to the protective box 1. A transformer body is installed inside the protective box 1, and the transformer body includes an insulating sleeve 14, within which an iron core and coil are disposed. A cooling assembly 2 is also provided inside the protective box 1. The cooling assembly 2 includes a fixing frame 21. An insulating block 141, matching the fixing frame 21, is adhered to the insulating sleeve 14. One end of the insulating block 141, away from the insulating sleeve 14, is adhered to the fixing frame 21. A fan 212, matching the insulating sleeve 14, is installed on the fixing frame 21. When the fan 212 rotates, the air blown by it can directly enter the insulating sleeve 14, causing air circulation within the insulating sleeve 14 and dissipating heat from the iron core and coil inside the insulating sleeve 14.

[0029] A cold air box 22 is welded below the fixed frame 21. A first water pipe 23 is welded onto the cold air box 22. The first water pipe 23 passes through the fixed frame 21. Multiple first fins 231 are welded onto the pipe body of the first water pipe 23 inside the cold air box 22. Coolant flows inside the first water pipe 23. The coolant exchanges heat with the air inside the cold air box 22 through the first fins 231, thereby reducing the air temperature inside the cold air box 22. When the fan 212 is working, it can draw out the relatively low-temperature air inside the cold air box 22, ensuring the heat dissipation effect on the iron core and coil inside the insulating sleeve 14.

[0030] Furthermore, the cooling assembly 2 also includes a water tank 24. A water pump 25 is mounted on the second water pipe 26 using conventional fixing methods such as bolts. The second water pipe 26 is welded to the water pump 25. The two ends of the second water pipe 26 are welded to the water tank 24 and the first water pipe 23, respectively. A third water pipe 27 is welded to the end of the first water pipe 23 away from the second water pipe 26. The end of the third water pipe 27 away from the first water pipe 23 is welded to the water tank 24. Specifically, the water tank 24 is also filled with coolant. When the water pump 25 is working, it draws coolant from the water tank 24 and delivers it to the first water pipe 23. Then, it flows back to the water tank 24 through the third water pipe 27, realizing the circulation of coolant in the first water pipe 23 and ensuring the heat exchange effect of the air in the first fin 231 and the cold air box 22.

[0031] Furthermore, the cold air box 22 is provided with multiple air inlets 221, and the box door 11 is provided with a first ventilation slot 111 that matches the air inlets 221. When the fan 212 rotates, the air inside the cold air box 22 is transported to the insulating sleeve 14, and the air pressure inside the cold air box 22 decreases. At this time, the air inside the protective box 1 enters the cold air box 22 from the air inlets 221 to replenish the air inside the cold air box 22. Preferably, the air inlets 221 are located on the lower side of the cold air box 22 and are lower than the first fins 231 on the first water pipe 23. When the air enters the cold air box 22 from the air inlets 221, it is drawn upward by the suction of the fan 212 and flows upward. During the flow, it exchanges heat with the multiple first fins 231, ensuring the heat exchange effect between the first fins 231 and the air.

[0032] Preferably, the coolant is water, which has a low cost and a high heat capacity, thus achieving a high heat dissipation effect.

[0033] It is worth noting that the temperature of the coolant in the reservoir 24 will rise after prolonged circulation. To lower the temperature of the coolant in the reservoir 24, such as... Figure 2 and Figure 3 As shown, the water tank 24 is bonded to the rear panel of the protective box 1. Multiple second fins 241 are welded onto the water tank 24. The second fins 241 penetrate the rear panel of the protective box 1. The coolant in the water tank 24 is cooled down by heat exchange with the outside air through the second fins 241, which prevents the coolant temperature from getting too high and ensures the heat exchange effect between the coolant and the air in the air box 22.

[0034] like Figure 5 and Figure 6 As shown, a connecting pipe 211 matching the insulating sleeve 14 is welded on the fixing frame 21. The end of the connecting pipe 211 away from the fixing frame 21 is connected to the insulating sleeve 14. The connecting pipe 211 can play a guiding role, guiding all the air blown out by the fan 212 into the insulating sleeve 14.

[0035] like Figure 4 and Figure 6 As shown, the mounting bracket 21 has a slot 214 that matches the fan 212. A dustproof net 213 is inserted into the slot 214. The dustproof net 213 filters out lint, flying insects and other dirt in the air, preventing dirt from entering the insulating sleeve 14 and causing contamination of the iron core and coil inside the insulating sleeve 14. To a certain extent, it can maintain the cleanliness of the iron core and coil inside the insulating sleeve 14.

[0036] A fixing plate 2131 is welded onto the dustproof net 213. The fixing plate 2131 is a magnetic plate. After the dustproof net 213 is inserted into the slot 214, the fixing plate 2131 is magnetically attracted to the fixing frame 21, which makes it convenient to pull out the dustproof net 213 at regular intervals for cleaning or replacement.

[0037] like Figure 1 , Figure 2 and Figure 5 As shown, the protective box 1 has multiple second ventilation slots 13, which are higher than the insulating sleeve 14. The air blown into the insulating sleeve 14 by the fan 212 is blown out from the top of the insulating sleeve 14. Because the air pressure is lower due to its higher temperature, it floats in the upper part of the protective box 1 and can be discharged from the second ventilation slots 13, thus circulating the air inside the protective box 1. Of course, an exhaust fan can be installed on the protective box 1 to enhance the air circulation inside the protective box 1.

[0038] Furthermore, a cap 12 is welded onto the protective box 1. The cap 12 prevents rain from leaking from the top of the protective box 1 and also covers the second ventilation slot 13, preventing rainwater from entering through the second ventilation slot 13 during heavy rain. Because the first ventilation slot 111 is located below the box door 11, even if rainwater enters the protective box 1 through the first ventilation slot 111 during heavy rain, the operation of the transformer body will not be affected because the transformer body is on the fixed frame 21, which is relatively high above the ground.

[0039] When using, such as Figures 2 to 5 As shown, the fan 212 draws relatively cool air from the cold air box 22 and blows it into the insulating sleeve 14 to dissipate heat from the iron core and coil inside the insulating sleeve 14, enabling the iron core and coil inside the insulating sleeve 14 to operate in a relatively low-temperature environment. At the same time, the water pump 25 draws coolant from the water tank 24 to circulate the coolant in the first water pipe 23, ensuring the heat exchange effect between the first fin 231 and the air inside the cold air box 22.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dry-type transformer comprising a protective box, a box door being rotatably connected to the protective box, a transformer body being installed in the protective box, the transformer body comprising an insulating sleeve, an iron core and a coil being arranged in the insulating sleeve, characterized in that, The protective enclosure is also equipped with a cooling system, which includes: A fixed frame is provided, on which an insulating block is fixedly connected. The end of the insulating block away from the insulating sleeve is fixedly connected to the fixed frame. A fan that matches the insulating sleeve is installed on the fixed frame. A cold air box is provided, on which a first water pipe is fixedly connected. Multiple first fins are fixedly connected to the first water pipe. Coolant flows inside the first water pipe. When the fan is working, it draws air from inside the first water pipe.

2. A dry-type transformer according to claim 1, characterized in that The cooling assembly also includes a water tank, on which a water pump is fixedly installed. A second water pipe is fixedly connected to the water pump. The two ends of the second water pipe are fixedly connected to the water tank and a first water pipe, respectively. A third water pipe is fixedly connected to the end of the first water pipe away from the second water pipe. The end of the third water pipe away from the first water pipe is fixedly connected to the water tank.

3. A dry-type transformer according to claim 2, characterized in that, A connecting pipe that matches the insulating sleeve is fixedly connected to the fixing frame.

4. A dry-type transformer according to claim 2, characterized in that The water storage tank is fixedly connected to the rear panel of the protective box, and multiple second fins are fixedly connected to the water storage tank, with the second fins penetrating the rear panel of the protective box.

5. A dry-type transformer according to claim 2, characterized in that The cold air box has multiple air inlets, and the box door has a first ventilation slot that matches the air inlets.

6. A dry-type transformer according to claim 5, characterized in that The air inlet is located on the lower side of the cold air box.

7. A dry-type transformer according to claim 2, characterized in that The protective box has multiple second ventilation slots, which are higher than the insulating sleeve.

8. A dry-type transformer according to claim 7, characterized in that A cap is fixedly connected to the protective box.

9. A dry-type transformer according to claim 2, characterized in that The mounting bracket has a slot that matches the fan, and a dustproof net is inserted into the slot.

10. A dry-type transformer according to claim 9, characterized in that A fixing plate, which is a magnetic plate, is fixedly connected to the dustproof net.

Images