All-weather dry-type transformer

Abstract

This application relates to the field of dry-type transformer technology, specifically disclosing an all-weather dry-type transformer, including: a tank, coils, a heat dissipation channel, and an insulating spacer; the coils are disposed inside the tank; the heat dissipation channel is disposed outside the tank; one end of the heat dissipation channel connects to the top surface of the tank, and the other end connects to the bottom of the tank; the insulating spacer is disposed inside the tank; one side of the insulating spacer connects to the inner wall of the tank, and the other side connects to the outer side of the coil, preventing airflow from passing between the coil and the tank. In this design, the heat generated by the operation of the dry-type transformer can be discharged into the heat dissipation channel through the top surface, and then the high-temperature gas is cooled by heat exchange with the outside through the heat dissipation channel; the cooled gas flows back into the tank, thus forming a natural cooling cycle. At the same time, the insulating spacer allows the circulated airflow to directly pass through the inner wall of the coil, thereby improving the heat dissipation effect.

Description

Technical Field

[0001] This application relates to the field of dry-type transformer technology, and more particularly to an all-weather dry-type transformer. Background Technology

[0002] A transformer is a device used in a power transmission system to change AC voltage. It achieves voltage step-up or step-down through the principle of electromagnetic induction. Based on different insulation and cooling methods, common transformers include oil-immersed transformers and dry-type transformers.

[0003] Oil-immersed transformers typically use insulating oil for insulation and heat dissipation, featuring rapid heat dissipation and a fully sealed design, making them widely used in outdoor applications. However, oil-immersed transformers use mineral oil as the insulating medium, which can lead to problems such as rusting, oil seepage, oil leakage, and reduced insulation performance during outdoor operation.

[0004] In comparison, dry-type transformers have the advantages of relatively clean structure and convenient use and maintenance; however, dry-type transformers rely on air circulation for heat dissipation, and they are more sensitive to the temperature, humidity, dust and corrosive media of the installation environment, so they are mostly used in indoor environments.

[0005] To adapt dry-type transformers to outdoor use conditions, the common practice in the prior art is to install a pavilion-type substation, protective enclosure, or other protective structure outside the dry-type transformer to reduce the impact of external environmental factors such as rain, moisture, dust, and salt spray on the transformer body.

[0006] However, while adding a pavilion-type substation or other external protection structure can improve the outdoor operating conditions of dry-type transformers to some extent, it will increase the overall equipment size, the floor space required, and the difficulty of installation and layout. Summary of the Invention

[0007] In view of this, the purpose of this application is to provide an all-weather dry-type transformer to solve some or all of the above-mentioned problems.

[0008] To achieve the above technical objectives, this application provides an all-weather dry-type transformer, comprising: a housing, coils, a heat dissipation channel, and insulating pads; The coil is disposed inside the housing; The heat dissipation channel is located on the outside of the housing; One end of the heat dissipation channel is connected to the top surface of the housing, and the other end is connected to the bottom of the housing; The insulating spacer is disposed inside the box; The insulating spacer is connected to the inner wall of the housing on one side and to the outer side of the coil on the other side, so that airflow cannot pass between the coil and the housing.

[0009] Furthermore, the heat dissipation channel is a sheet-like plate with built-in channels; The heat dissipation channels include multiple channels; The multiple heat dissipation channels are distributed at intervals on the housing.

[0010] Furthermore, the heat dissipation channel includes a first plate and a second plate; The first plate and the second plate are symmetrically arranged on both sides of the box body along the first direction.

[0011] Furthermore, the two sides of the enclosure along the first direction are respectively the high-pressure side and the low-pressure side.

[0012] Furthermore, the plurality of heat dissipation channels are spaced apart along the second direction; The second direction and the first direction are both horizontal and perpendicular to each other.

[0013] Furthermore, the heat dissipation channel is a tubular structure; The heat dissipation channels include multiple channels; The plurality of heat dissipation channels are spaced apart along the second direction on the housing.

[0014] Furthermore, the heat dissipation channel includes multiple layers of sub-pipes nested along the first direction; The sub-pipes are spaced apart in multiple layers.

[0015] Furthermore, the heat dissipation channel extends vertically upwards, such that the top of the heat dissipation channel forms a predetermined distance with the top of the housing.

[0016] Furthermore, the distance between the bottom end of the heat dissipation channel and the top surface of the housing is the lower end interval distance; The lower end spacing distance is less than the preset distance.

[0017] Furthermore, a fan is installed inside the box; The air outlet of the fan faces upwards.

[0018] As can be seen from the above technical solutions, this application provides an all-weather dry-type transformer, including: a housing, a coil, a heat dissipation channel, and an insulating spacer; the coil is disposed inside the housing; the heat dissipation channel is disposed outside the housing; one end of the heat dissipation channel is connected to the top surface of the housing, and the other end is connected to the bottom of the housing; the insulating spacer is disposed inside the housing; one side of the insulating spacer is connected to the inner wall of the housing, and the other side is connected to the outer side of the coil, so that airflow cannot pass between the coil and the housing.

[0019] In this design, the heat generated by the dry-type transformer during operation can be discharged into the heat dissipation channel through the top surface. The heat is then exchanged with the outside through the channel to cool the high-temperature gas. The cooled gas then flows back into the tank, forming a natural cooling cycle. Simultaneously, the insulating spacer allows the circulated airflow to pass directly through the inner wall of the coils, improving heat dissipation. Through this structure, the dry-type transformer provided by this design combines rapid heat dissipation with a fully sealed configuration, allowing for direct outdoor application without the need for an outdoor pavilion-style substation, thus solving the problem of large footprint associated with existing outdoor dry-type transformers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A perspective view of an all-weather dry-type transformer provided for an embodiment of this application; Figure 2 A perspective view of an all-weather dry-type transformer provided for another embodiment of this application; Figure 3 A front perspective view of an all-weather dry-type transformer provided for another embodiment of this application; Figure 4 A schematic diagram of a heat dissipation channel for an all-weather dry-type transformer provided in an embodiment of this application; Figure 5 A schematic diagram of a heat dissipation channel for an all-weather dry-type transformer provided in another embodiment of this application; Figure 6 A perspective view of an all-weather dry-type transformer provided for other embodiments of this application; In the diagram: 10, housing; 20, coil; 30, heat dissipation channel; 31, first plate; 32, second plate; 33, notch; 301, sub-pipe; 302, wide sub-pipe; 40, insulating spacer; 50, sleeve. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0023] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0025] Please see Figures 1 to 3 This application provides an all-weather dry-type transformer, comprising: a housing 10, a coil 20, a heat dissipation channel 30, and an insulating spacer 40. The coil 20 is disposed within the housing 10; other main components of the transformer can also be disposed within the housing 10. The coil 20 includes a high-voltage side winding and a low-voltage side winding; the difference in the number of turns between the two windings enables voltage conversion. During transformer operation, current flowing through the coil's conductors generates heat due to resistance; therefore, the coil is the primary heat-generating component during transformer operation.

[0026] The heat dissipation channel 30 is located on the outside of the housing 10; one end of the heat dissipation channel 30 connects to the top surface of the housing 10, and the other end connects to the bottom of the housing 10; wherein, the bottom of the housing 10 refers to the area of ​​the housing 10 located at the bottom in the vertical direction, which can refer to the bottom surface or the bottom of the side. The heat dissipation channel 30 has a circulating air passage inside, which allows air to flow, and the two ends of the air passage serve as the two ends of the heat dissipation channel 30.

[0027] In practical applications, the other end of the heat dissipation channel 30 can be connected to the bottom of the side of the cabinet 10 to avoid occupying the space on the bottom surface of the cabinet 10.

[0028] In practical applications, the two ends of the heat dissipation channel 30 can be connected to the housing 10 by welding, flanges, or other methods. Air vents are provided on the top and bottom of the housing 10 to connect to the two ends of the heat dissipation channel 30.

[0029] An insulating spacer 40 is disposed inside the housing 10; one side of the insulating spacer 40 is connected to the inner wall of the housing 10, and the other side is connected to the outer side of the coil 20, so that airflow cannot pass between the coil 20 and the housing 10.

[0030] In this embodiment, the heat generated by the transformer operation flows upward into the heat dissipation channel 30 and along it. After exchanging heat with the outside atmosphere through the heat dissipation channel 30, it flows back into the housing 10 from the bottom. The heat dissipation channel 30, through the principle of thermal convection, achieves continuous airflow circulation, preventing heat accumulation inside the housing 10 and dissipating heat to the outside during airflow circulation. Simultaneously, the insulating spacer 40 seals the area between the coil 20 and the housing 10, ensuring that the cooled airflow can flow directly from the bottom of the coil 20 through it, thereby cooling the coil 20 and ensuring that the heat generated by the coil 20 is effectively carried away by the airflow circulation.

[0031] In summary, the dry-type transformer provided in this embodiment can effectively dissipate heat from the coil 20 and maintain the housing 10 as a sealed structure, effectively preventing external moisture, dust, etc. from entering the housing. This allows the transformer to be directly applied in outdoor environments and cope with various climatic conditions, adapting to harsh environments such as high temperature, low temperature, high humidity, and salt spray. Furthermore, the dry-type structure can completely avoid the risk of oil leakage of oil-immersed transformers.

[0032] In one embodiment, such as Figure 1 As shown, the heat dissipation channel 30 is a sheet-like plate with built-in channels; multiple heat dissipation channels 30 are included; the multiple heat dissipation channels 30 are distributed at intervals on the housing 10. Compared with a single structure, in this embodiment, multiple heat dissipation channels 30 are provided on both sides of the housing 10. The multiple sheet-like heat dissipation channels 30 have a larger heat dissipation surface area, thereby enabling more efficient heat exchange with the air to improve heat dissipation efficiency; at the same time, the multiple heat dissipation channels 30 are distributed at intervals, which not only ensures the independent heat dissipation space of each channel, but also forms a uniform heat dissipation array to reduce heat dissipation blind spots, allowing the heat inside the housing 10 to be evenly dissipated and preventing local overheating.

[0033] Based on the aforementioned heat dissipation channel 30 comprising multiple components, the heat dissipation channel 30 includes a first plate 31 and a second plate 32, that is, both the first plate 31 and the second plate 32 comprise multiple components; the first plate 31 and the second plate 32 are symmetrically arranged on both sides of the housing 10 along the first direction X, realizing synchronous airflow from both sides to improve the uniformity of heat dissipation on both sides of the housing 10. Wherein, the first direction X is as follows... Figure 1 The X-axis direction is shown in the diagram.

[0034] In one embodiment, the two sides of the housing 10 along the first direction X are respectively the high-voltage side and the low-voltage side, wherein the high-voltage side corresponds to the high-voltage side winding of the coil 20, and the low-voltage side corresponds to the low-voltage side winding of the coil 20.

[0035] In practical applications, the high-voltage and low-voltage sides inside the enclosure 10 are the main heat-generating areas. Therefore, the heat dissipation channels 30 located on both sides of the first direction X can achieve targeted heat dissipation on the high-voltage and low-voltage sides, ensuring effective heat dissipation.

[0036] Based on the above embodiments, the plurality of heat dissipation channels 30 can be configured to be spaced apart along the second direction Y; wherein the second direction Y is as follows: Figure 1 As shown in the Y-axis direction, it is horizontal and perpendicular to the first direction X.

[0037] Multiple heat dissipation channels 30 are distributed at intervals along the second direction Y to form a uniformly arranged heat dissipation array and fully cover the sides of the cabinet 10. This ensures that heat can be quickly dissipated from all areas of the cabinet 10. At the same time, the uniformly distributed structure makes the heat dissipation process more stable and reduces operational fluctuations caused by local heat dissipation differences.

[0038] In one embodiment, see Figure 2 and Figure 3 The heat dissipation channel 30 can be a tubular structure, which includes multiple channels. The multiple heat dissipation channels 30 are distributed at intervals along the second direction Y on the housing 10.

[0039] In a more specific embodiment, the heat dissipation channel 30 includes multiple layers of sub-pipes 301 nested along the first direction X; the multiple layers of sub-pipes 301 are spaced apart. Each of the multiple layers of sub-pipes 301 has an independent air passage, which can further increase the heat dissipation surface area to improve heat exchange efficiency. Furthermore, an air gap is formed between adjacent sub-pipes 301, thereby realizing a multi-layer heat dissipation structure and further improving heat dissipation capacity in a limited space.

[0040] In practical applications, the housing 10 corresponds to multiple sub-pipes 301, and multiple independent air ports can be set.

[0041] In one embodiment, see Figure 6The heat dissipation channel 30 extends along the second direction Y to form a wide tubular structure. Furthermore, in this embodiment, the heat dissipation channel 30 may include multiple wide sub-channels 302. These multiple wide sub-channels 302 are nested at intervals along the first direction X. By using multiple nested wide sub-channels 302, multiple layers of heat exchange channels can be formed within the width of a single heat dissipation channel 30, thereby increasing the heat exchange area and heat exchange path without significantly increasing the overall dimensions of the heat dissipation channel, thus improving heat dissipation efficiency. Moreover, compared to multiple separately arranged sheet-like heat dissipation channels, this structure reduces the number of independent components of the heat dissipation channel and the connection points with the housing 10, which is beneficial for improving structural compactness and sealing reliability.

[0042] In one embodiment, see Figure 6 The sleeve 50 can be installed on the side of the housing 10.

[0043] In one embodiment, see Figures 1 to 5 The heat dissipation channel 30 is a semi-annular structure with a notch 33. The two ends of the notch 33 in the heat dissipation channel 30 are connected to the top and bottom surfaces of the housing 10, respectively. The semi-annular structure creates a gap between the heat dissipation channel 30 and the housing 10, thereby increasing the heat exchange area of ​​the heat dissipation channel 30.

[0044] In practical applications, the heat dissipation channel 30 can be a semi-circular structure of a circular ring or a semi-circular structure of a rectangular ring; no limitation is made in this embodiment.

[0045] In one embodiment, the heat dissipation channel 30 extends vertically upward, such that the top of the heat dissipation channel 30 forms a predetermined distance L with the top of the housing 10.

[0046] The vertical upward extension of the heat dissipation channel 30 increases the distance between the heat dissipation channel 30 and the top surface of the housing 10, thereby increasing the thermal pressure difference between the top and bottom of the heat dissipation channel 30, which accelerates heat convection within the heat dissipation channel 30 and promotes heat dissipation. Furthermore, the upward vertical extension structure increases the heat exchange area without occupying horizontal space, facilitating transformer installation in narrow outdoor areas.

[0047] In one implementation, the distance between the bottom end of the heat dissipation channel 30 and the top surface of the housing 10 is the lower end interval distance D; the lower end interval distance D is less than the preset distance L.

[0048] By setting the lower end interval distance D to be less than the preset distance L, a greater height difference can be formed between the top of the heat dissipation channel 30 and the top surface of the box 10, thereby increasing the thermal pressure difference of the circulating airflow in the heat dissipation channel 30, increasing the driving force for the rising of hot air and the falling of cold air, improving the natural convection circulation speed, and strengthening the natural convection process; at the same time, it can extend the flow path of high-temperature gas in the heat dissipation channel 30, increase the heat exchange area and heat exchange time, so that the gas can be cooled more fully before returning to the box, thereby improving the overall heat dissipation efficiency.

[0049] In one embodiment, a fan is installed inside the housing 10; the fan's outlet faces upward. The fan can be located at the air inlet end of the heat dissipation channel 30. The fan increases the airflow rate inside the housing 10, quickly pushing the heat generated by the coil 20 into the heat dissipation channel 30, ensuring that heat is dissipated from the housing 10 in a timely manner.

[0050] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dry-type transformer suitable for all weather conditions, characterized in that, include: Housing (10), coil (20), heat dissipation channel (30) and insulating spacer (40); The coil (20) is disposed inside the housing (10); The heat dissipation channel (30) is located on the outside of the housing (10); One end of the heat dissipation channel (30) is connected to the top surface of the box (10), and the other end is connected to the lower part of the box (10); The insulating spacer (40) is disposed inside the housing (10); The insulating spacer (40) is connected to the inner wall of the housing (10) on one side and to the outer side of the coil (20) on the other side, so that airflow cannot pass between the coil (20) and the housing (10).

2. The all-weather dry-type transformer according to claim 1, characterized in that, The heat dissipation channel (30) is a sheet-like plate with built-in channels; The heat dissipation channel (30) includes multiple channels; Multiple heat dissipation channels (30) are spaced apart on the housing (10).

3. The all-weather dry-type transformer according to claim 2, characterized in that, The heat dissipation channel (30) includes a first plate (31) and a second plate (32); The first plate (31) and the second plate (32) are symmetrically arranged on both sides of the box (10) along the first direction (X).

4. The all-weather dry-type transformer according to claim 3, characterized in that, The box (10) has a high-pressure side and a low-pressure side on both sides along the first direction (X).

5. The all-weather dry-type transformer according to claim 3, characterized in that, The plurality of heat dissipation channels (30) are spaced apart along the second direction (Y); The second direction (Y) and the first direction (X) are both horizontal and perpendicular to each other.

6. The all-weather dry-type transformer according to claim 1, characterized in that, The heat dissipation channel (30) is a tubular structure; The heat dissipation channel (30) includes multiple channels; Multiple heat dissipation channels (30) are distributed at intervals along the second direction (Y) on the housing (10).

7. The all-weather dry-type transformer according to claim 6, characterized in that, The heat dissipation channel (30) includes a multi-layer sub-pipe (301) nested along the first direction (X); The sub-pipes (301) of the multi-layer structure are spaced apart.

8. The all-weather dry-type transformer according to any one of claims 1 to 7, characterized in that, The heat dissipation channel (30) extends vertically upward, so that the top of the heat dissipation channel (30) forms a preset distance (L) with the top of the box (10).

9. The all-weather dry-type transformer according to claim 8, characterized in that, The distance between the bottom end of the heat dissipation channel (30) and the top surface of the box (10) is the lower end spacing distance (D). The lower end interval distance (D) is less than the preset distance (L).

10. The all-weather dry-type transformer according to claim 1, characterized in that, A fan is installed inside the housing (10); The air outlet of the fan faces upwards.

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