Novel heat dissipation device of dry-type transformer and dry-type transformer

Abstract

The utility model relates to a novel heat dissipation device of a dry-type transformer and the dry-type transformer, the novel heat dissipation device of the dry-type transformer comprises two air pipes, one ends of the two air pipes are used for extending into a box body of the dry-type transformer and are arranged at the bottom of a coil of the dry-type transformer at an interval; the other end of the air pipe is located outside the dry-type transformer and provided with a first flange plate, and a plurality of first air holes are formed in the air pipe at intervals and used for being in one-to-one correspondence with the coils; the fan is arranged outside the box body; an air duct is formed in the air duct matching part, one end of the air duct is communicated with the fan, two second flange plates matched with the first flange plates in a one-to-one correspondence mode are arranged on one side of the air duct matching part, and the two second flange plates are movably arranged at an outlet of the air duct respectively; the other end of the air duct communicates with the air pipe through the opening of the second flange. The air pipe matching piece can be used in cooperation with air pipes at various intervals, and the universality of the heat dissipation device is improved.

Description

Technical Field

[0001] This disclosure relates to the field of transformer cooling technology, specifically to a novel heat dissipation device for dry-type transformers and a dry-type transformer. Background Technology

[0002] In related technologies, the ventilation and cooling systems for excitation transformers and dry-type transformers are typically installed inside the transformer casing. Three cooling fans are configured on each of the three-phase high and low voltage sides, totaling six fans. Some large transformers even have a total of 12 fans to achieve reliable cooling. The fans blow air through the bottom of the dry-type transformer at a 45-degree angle or vertically into the air ducts, thus ventilating and cooling the internal windings. However, this system not only requires a large number of fans but also presents challenges for fan maintenance. Power outages are necessary for fan repairs, impacting the transformer's reliability. Furthermore, since power plants have various transformer specifications, different sized fans must be selected and installed in different locations each time the cooling system is installed, making installation cumbersome and requiring the purchase of different fan models. This significantly increases procurement and maintenance costs, and greatly reduces the transformer's reliability, availability, and maintainability. The internal fan cooling structure also causes the heat generated by the transformer to circulate around the transformer body, hindering heat dissipation. Utility Model Content

[0003] The purpose of this disclosure is to provide a novel heat dissipation device for dry-type transformers and a dry-type transformer, in order to solve the problems of inconvenient maintenance, high cost, system complexity and low versatility of cooling systems in related technologies.

[0004] To achieve the above objectives, this disclosure provides a novel heat dissipation device for dry-type transformers, comprising:

[0005] Two air ducts, one end of which is used to extend into the housing of the dry-type transformer and is spaced apart at the bottom of the coil of the dry-type transformer, and the other end is located outside the dry-type transformer and is provided with a first flange. Multiple first air holes are spaced apart on the air ducts, and the multiple first air holes are used to correspond one-to-one with the coil.

[0006] A fan, the fan being installed outside the housing; and

[0007] A duct fitting has an internal air duct. One end of the air duct is connected to the fan. One side of the duct fitting has two second flanges that mate with the first flange. The two second flanges are movably disposed at the outlet of the air duct. The other end of the air duct is connected to the duct through the opening of the second flange.

[0008] Optionally, the number of fans is two, and the air duct includes two spaced-apart air duct branches, with each end of the air duct branch connected to a fan and an air duct, respectively.

[0009] Optionally, the air duct further includes a connecting section, with each end of the connecting section connected to two air duct branches.

[0010] Optionally, the opening area of ​​the second flange is smaller than the inner diameter of the side of the duct section closest to the duct.

[0011] Optionally, a baffle plate is connected to the outer edge of the second flange, which can block the outlet of the air duct on the outer side of the second flange.

[0012] Optionally, the wind deflector is located in the outlet of the air duct, and a slide is provided on the inner side wall of the outlet of the air duct, with the opposite side edges of the wind deflector movably disposed in the slide.

[0013] Optionally, the first air hole is configured to correspond to the inner side of the coil, and the air duct is also provided with a plurality of second air holes spaced apart from the first air hole. The plurality of second air holes are arranged circumferentially spaced along the first air hole, and the second air holes are configured to correspond to the outer side of the coil.

[0014] According to another aspect of this disclosure, a dry-type transformer is provided, comprising:

[0015] The box body is hollow inside and has a receiving cavity;

[0016] Multiple coils, arranged side-by-side, are located within the receiving cavity; and

[0017] In the aforementioned novel heat dissipation device for dry-type transformers, one end of each of the two air ducts extends into the housing and is spaced apart at the bottom of the coil, while the other end is located outside the dry-type transformer.

[0018] Optionally, the housing includes:

[0019] Side walls, which together form the receiving cavity, and the air duct connected to the lower part of the side walls; and

[0020] The top wall, whose edge connects to the side wall and is located above the coil, is a closed structure.

[0021] Optionally, the sidewall is a mesh structure.

[0022] The above technical solution involves installing a fan on the outside of the dry-type transformer's enclosure, eliminating the need to shut down the transformer and disconnect power for fan maintenance, thus improving maintenance convenience. Furthermore, a duct matching component is installed between the fan and the ductwork. The two second flanges on one side of the duct are adjustable. Since transformers vary in size, the spacing between the two ducts differs depending on the transformer's dimensions. Therefore, with adjustable distance between the two second flanges, the duct matching component can be used with ducts of various sizes and spacings. This ensures effective transformer cooling while also making the cooling system adaptable to various dry-type transformer specifications, enhancing its versatility.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a top view of a dry-type transformer according to one embodiment of the present disclosure.

[0026] Figure 2 This is a schematic diagram of a dry-type transformer according to one embodiment of the present disclosure.

[0027] Figure 3 This is a schematic diagram of the duct and coil in a dry-type transformer according to one embodiment of the present disclosure.

[0028] Figure 4 This is a schematic diagram showing the first and second air holes corresponding to the coil in a dry-type transformer according to one embodiment of the present disclosure.

[0029] Figure 5 This is a schematic diagram of the duct matching component in a novel heat dissipation device for a dry-type transformer according to one embodiment of the present disclosure.

[0030] Explanation of reference numerals in the attached figures

[0031] 1-Enclosure; 11-Side wall; 12-Top wall; 2-Coil; 3-Air duct; 30-First flange; 31-First air vent; 32-Second air vent; 4-Fan; 40-Filter screen; 5-Air duct matching parts; 51-Air duct; 511-Air duct branch; 512-Connecting section; 52-Second flange; 521-Wind baffle; 6-Transformer core. Detailed Implementation

[0032] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0033] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" are defined in relation to the actual arrangement direction of the transformer during use, and directional terms such as "inner" and "outer" are defined in relation to the outline of the corresponding components. The terms "first," "second," etc., are used to distinguish different components and do not imply sequentiality or importance. Furthermore, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0034] According to one embodiment of this disclosure, such as Figures 1 to 5 As shown, a novel heat dissipation device for a dry-type transformer is provided, comprising two air ducts 3, a fan 4, and air duct matching components 5. One end of each air duct 3 extends into the housing 1 of the dry-type transformer and is spaced apart at the bottom of the coil 2. The other end can be located outside the dry-type transformer and is equipped with a first flange 30. Multiple first air holes 31 are spaced apart on the air ducts 3, each corresponding to a coil 2. The fan 4 is located outside the housing 1. An air duct 51 is formed inside the air duct matching component 5. One end of the air duct 51 is connected to the fan 4. Two second flanges 52, corresponding to the first flanges 30, are provided on one side of the air duct matching component 5. The two second flanges 52 are movably positioned at the outlet of the air duct 51, and the other end of the air duct 51 communicates with the air duct 3 through the opening of the second flanges 52. It should be noted that the two air ducts 3 can be located on the high-voltage side and low-voltage side of the coil 2, respectively, i.e., on both sides of the transformer core 6 at the center of the coil 2.

[0035] Through the above technical solution, a fan 4 is installed on the outside of the dry-type transformer's casing 1, allowing for maintenance of the fan 4 without shutting down the transformer and disconnecting the power, thus improving maintenance convenience. Furthermore, a duct matching component 5 is installed between the fan 4 and the duct 3. The two second flanges 52 on one side of the duct 3 of the duct matching component 5 are adjustable. Since transformers have different specifications and dimensions, the spacing between the two ducts 3 varies depending on the transformer type. Therefore, with the distance between the two second flanges 52 adjustable, the duct matching component 5 can be used with ducts 3 of various sizes and spacings. This ensures effective heat dissipation for the transformer while also allowing the heat dissipation device to be adapted to various specifications of dry-type transformers, improving the versatility of the heat dissipation device.

[0036] It should be noted that the externally arranged fan intake structure in this disclosure also allows the heat generated by the transformer to circulate between the inside and outside of the transformer, overcoming the drawback of the original transformer's small internal space where heat circulation is difficult to dissipate. This allows the heat generated by the transformer to quickly escape from the transformer due to factors such as wind pressure and airflow.

[0037] According to one embodiment of this disclosure, such as Figure 1 As shown, the number of fans 4 can be two. The air duct 51 includes two air duct branches 511 arranged at intervals. The two ends of the air duct branch 511 are respectively connected to a fan 4 and an air duct 3. Increasing the number of fans 4 and making them correspond one-to-one with the air duct branch 511 can increase the air force of the air duct 3 on the coil 2 and improve the heat dissipation effect.

[0038] Furthermore, such as Figure 1 As shown, the air duct 51 may also include a connecting section 512, with both ends of the connecting section 512 connected to two air duct branch sections 511 respectively. When one fan 4 malfunctions or shuts down, the air blown by the other fan 4 can be introduced into the other air duct branch section 511 through the connecting section 512, allowing the two fans 4 to be used alternately. This not only extends the service life of the fans 4 but also prevents the air duct 3 corresponding to one fan 4 from failing to dissipate heat to the coil 2 when that fan 4 is shut down. The two fans 4 can be housed together in the same box composed of a filter screen 40 for preliminary filtration during air intake, reducing impurities entering the fans 4 and decreasing the probability of fan 4 malfunction.

[0039] According to one embodiment of this disclosure, such as Figure 5 As shown, the opening area of ​​the second flange 52 is smaller than the inner diameter of the duct support section 511 near the duct 3. The opening area of ​​the second flange 52 can be smaller than the opening area of ​​the duct 51 near the second flange 52. In this way, during the movement of the second flange 52, the size of the air outlet of the duct matching part 5 can always be the size of the opening of the second flange 52, and there will be no partial overlap between the wall of the duct 51 outlet and the opening of the second flange 52. The air volume of the fan 4 can be kept consistent based on the adjustable spacing between the two second flanges 52, thereby ensuring the heat dissipation effect of the transformer.

[0040] According to one embodiment of this disclosure, such as Figure 5 As shown, a baffle plate 521 can be connected to the outer edge of the second flange 52. The baffle plate 521 can block the outlet of the air duct 51 on the outside of the second flange 52. This prevents air from leaking from the gap between the second flange 52 and the outlet of the air duct 51, thus avoiding wasting air volume.

[0041] Furthermore, such as Figure 5As shown, the baffle plate 521 can be located in the outlet of the air duct 51, and a slide rail is provided on the inner side wall of the outlet of the air duct 51. The opposite side edges of the baffle plate 521 are movably disposed in the slide rail. Here, the extension direction of the slide rail can be the length direction of the air duct matching member 5, that is, the direction in which the two baffle plates 521 can move closer to each other or further away from each other. The baffle plate 521 being disposed on the inner side of the outlet of the air duct 51 can improve the connection stability between the baffle plate 521 and the second flange 52 on the air duct matching member 5. The slide rail can further improve the stability of the movement of the baffle plate 521, and at the same time, it can also limit the movement path and movement range of the baffle plate 521. Alternatively, the baffle plate 521 can also be disposed on the outer side of the outlet of the air duct 51, in which case the slide rail can be disposed on the outer side wall of the outlet of the air duct 51, which is not limited in this disclosure.

[0042] According to one embodiment of this disclosure, such as Figure 1 and Figure 4 As shown, the first air vent 31 can be correspondingly set on the inner side of the coil 2. The first air vent 31 can match the contour of the coil 2. Here, contour matching means that the first air vent 31 is opened on the overlapping part of the air duct 3 and the inner side of the coil 2. In this way, the airflow range inside the coil 2 can be expanded as much as possible, and the airflow from the first air vent 31 will not be blocked by the contour of the coil 2. This minimizes the weakening of the airflow velocity from the first air vent 31, allowing the airflow from the first air vent 31 to move along the axial direction of the coil 2 as quickly as possible until it is blown out from the top of the coil 2 and diffuses to the outside of the coil 2, improving the heat dissipation effect of the coil 2. The air duct 3 can also be provided with multiple second air vents 32 spaced apart from the first air vent 31. The multiple second air vents 32 are arranged circumferentially around the first air vents 31, and the second air vents 32 are correspondingly set on the outer side of the coil 2 to dissipate heat from the outside of the coil 2, thereby further improving the heat dissipation effect of the transformer.

[0043] Based on the above-mentioned solutions, this disclosure also provides a dry-type transformer, which includes a housing 1, multiple coils 2, and the aforementioned novel heat dissipation device for dry-type transformers. The housing 1 is hollow and forms a receiving cavity. The multiple coils 2 are arranged side-by-side within the receiving cavity. One end of each of the two air ducts 3 of the heat dissipation device extends into the housing 1 and is spaced apart at the bottom of the coils 2, while the other end is located outside the dry-type transformer. Here, the dry-type transformer incorporates all the beneficial effects of the aforementioned novel heat dissipation device for dry-type transformers, which will not be elaborated further.

[0044] According to one embodiment of this disclosure, such as Figure 2As shown, the enclosure 1 may include side walls 11 and a top wall 12. The side walls 11 together form a receiving cavity, and the air duct 3 can be connected to the lower part of the side walls 11. The edge of the top wall 12 is connected to the side walls 11 and is located above the coil 2. Since dry-type transformers are mostly placed indoors and there is a risk of water leakage from above, the top wall 12 is a closed structure, such as a steel plate or aluminum plate, to prevent water from flowing from the top wall 12 into the enclosure 1 of the dry-type transformer, causing short circuits or other malfunctions in the internal components. In addition, the side walls 11 can be a mesh structure to improve the heat dissipation of the transformer while ensuring waterproofing at the top.

[0045] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0046] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0047] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A novel heat dissipation device for dry-type transformers, characterized in that, include: Two air ducts, one end of which is used to extend into the housing of the dry-type transformer and is spaced apart at the bottom of the coil of the dry-type transformer, and the other end is located outside the dry-type transformer and is provided with a first flange. Multiple first air holes are spaced apart on the air ducts, and the multiple first air holes are used to correspond one-to-one with the coil. A fan, the fan being installed outside the housing; and A duct fitting has an internal air duct. One end of the air duct is connected to the fan. One side of the duct fitting is provided with two second flanges that mate with the first flange. The two second flanges are movably disposed at the outlet of the air duct. The other end of the air duct is connected to the duct through the opening of the second flange.

2. The novel heat dissipation device for dry-type transformers according to claim 1, characterized in that, The number of fans is two, and the air duct includes two spaced-apart air duct branches, with each end of the air duct branch connected to a fan and an air duct, respectively.

3. The novel heat dissipation device for dry-type transformers according to claim 2, characterized in that, The air duct also includes a connecting section, the two ends of which are respectively connected to two air duct branches.

4. The novel heat dissipation device for dry-type transformers according to claim 3, characterized in that, The opening area of ​​the second flange is smaller than the inner diameter of the side of the duct section closest to the duct.

5. The novel heat dissipation device for dry-type transformers according to claim 1, characterized in that, The outer edge of the second flange is connected to a baffle plate, which can block the outlet of the air duct on the outside of the second flange.

6. The novel heat dissipation device for dry-type transformers according to claim 5, characterized in that, The wind deflector is located in the outlet of the air duct, and a slide is provided on the inner side wall of the outlet of the air duct. The opposite two side edges of the wind deflector are movably disposed in the slide.

7. The novel heat dissipation device for dry-type transformers according to claim 1, characterized in that, The first air hole is configured to correspond to the inner side of the coil. The air duct is also provided with a plurality of second air holes spaced apart from the first air hole. The plurality of second air holes are arranged circumferentially spaced along the first air hole. The second air holes are configured to correspond to the outer side of the coil.

8. A dry-type transformer, characterized in that, include: The box body is hollow inside and has a receiving cavity; Multiple coils are arranged side by side and located within the receiving cavity; and The novel heat dissipation device for a dry-type transformer according to any one of claims 1-7, wherein one end of each of the two air ducts extends into the housing and is spaced apart at the bottom of the coil, and the other end is located outside the dry-type transformer.

9. The dry-type transformer according to claim 8, characterized in that, The enclosure includes: Side walls, which together form the receiving cavity, and the air duct connected to the lower part of the side walls; and The top wall, whose edge connects to the side wall and is located above the coil, is a closed structure.

10. The dry-type transformer according to claim 9, characterized in that, The sidewall has a mesh structure.

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