Dry-type transformer structure with multi-channel circulating heat dissipation function

Abstract

The utility model provides a dry-type transformer structure with multi-channel circulation heat dissipation, and relates to the technical field of dry-type transformers, the dry-type transformer structure comprises a dry-type transformer body, a first exhaust plate and a second exhaust plate are distributed on the outer side face of a winding, exhaust net openings are formed in the arc faces of the inner sides of the first exhaust plate and the second exhaust plate, and the first exhaust plate and the second exhaust plate are arranged in the dry-type transformer body. Air guide cavities are formed in the inner sides of the first exhaust plate and the second exhaust plate, a ventilation plate frame is welded to the rear end face of the first exhaust plate and the rear end face of the second exhaust plate, a first ventilation cavity channel, a second ventilation cavity channel and a third ventilation cavity channel are formed in the inner side of the ventilation plate frame, and a cooling fan is installed on the rear surface of the ventilation plate frame. And the heat dissipation fan is communicated with the air guide cavity through the first ventilation cavity channel, the second ventilation cavity channel and the third ventilation cavity channel. The dry-type transformer solves the problems that in the prior art, a cooling fan located on one side of the dry-type transformer accelerates local cooling of the transformer, and the overall cooling efficiency of the dry-type transformer is difficult to improve.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, specifically to a dry-type transformer structure with multi-channel circulating heat dissipation. Background Technology

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery, and other applications. Simply put, a dry-type transformer is one whose core and windings are not immersed in insulating oil. Cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). With natural air cooling, the transformer can operate continuously at its rated capacity for extended periods. With forced air cooling, the transformer's output capacity can be increased by 50%. This technology is suitable for intermittent overload operation or emergency overload operation. However, due to the significant increase in load loss and impedance voltage during overload, it operates in an uneconomical state and should not be subjected to prolonged continuous overload operation. A search revealed an existing technology (Announcement No.: CN202221152531.9) describing a dry-type transformer structure with superior heat dissipation. The description states that "by inserting the locking block into the locking slot, the fixing block is secured within the slot under the elastic force of the spring, thereby fixing the connecting plate. A cooling fan located on one side of the connecting plate effectively dissipates heat from the dry-type transformer body." However, the existing technology's cooling fan on one side of the dry-type transformer accelerates localized heat dissipation, making it difficult to improve the overall heat dissipation efficiency of the dry-type transformer. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a multi-channel circulating heat dissipation dry-type transformer structure is provided to solve the problem that in existing technologies, the cooling fan located on one side of the dry-type transformer accelerates local heat dissipation of the transformer, making it difficult to improve the overall heat dissipation efficiency of the dry-type transformer.

[0004] To achieve the above objectives, a multi-channel circulating heat dissipation dry-type transformer structure is provided, comprising: a dry-type transformer body, wherein three sets of windings are partially arranged in the dry-type transformer body.

[0005] The outer side of the winding is provided with a first exhaust plate and a second exhaust plate. An exhaust mesh is provided on the inner arc surface of the first exhaust plate and the second exhaust plate. An air guide cavity is opened on the inner side of the first exhaust plate and the second exhaust plate. A ventilation frame is welded to the rear end face of the first exhaust plate and the second exhaust plate. A first ventilation channel, a second ventilation channel and a third ventilation channel are opened on the inner side of the ventilation frame. A cooling fan is installed on the rear surface of the ventilation frame. The cooling fan is connected to the air guide cavity through the first ventilation channel, the second ventilation channel and the third ventilation channel.

[0006] Furthermore, a clamp is installed at the upper end of the winding, and a low-voltage copper busbar and a high-voltage terminal are installed on the surface of the clamp, while a base is fixed at the lower end of the winding.

[0007] Furthermore, the lower end face of the base is welded with mounting feet, and the front end face of the winding is connected with a high-voltage connecting rod.

[0008] Furthermore, the first and second exhaust panels are arranged in a semi-encircling manner in the rear half of the winding; and the second exhaust panel is located at the lower end of the first exhaust panel.

[0009] Furthermore, the first exhaust plate and the second exhaust plate are connected to the exhaust mesh through the air guide cavity.

[0010] Furthermore, the upper and lower ends of the ventilation plate frame are fixed to the dry-type transformer body through connecting brackets, and a streamlined guide plate is welded to the front surface of the ventilation plate frame.

[0011] Furthermore, a temperature sensor is installed at the front end of the streamlined guide plate, and three sets of cooling fans are arranged at the rear cavity of the ventilation plate frame.

[0012] The beneficial effects of this utility model are as follows: the multi-channel circulating heat dissipation dry-type transformer structure of this utility model utilizes a first exhaust plate, a second exhaust plate, a ventilation plate frame, and a heat dissipation fan to form a multi-channel circulating heat dissipation structure. The heat dissipation fan compresses and delivers outside air to three sets of ventilation ducts. The three sets of ventilation ducts then discharge the compressed air through multiple exhaust ports on the arc surface of the exhaust plate, allowing the discharged air to carry away the heat on the surface of the dry-type transformer. This facilitates the flow of air discharged from multiple channels throughout the entire dry-type transformer, accelerating the airflow on the surface of the entire dry-type transformer, making it easier to more evenly carry away and dissipate the heat of the dry-type transformer, reducing local overheating phenomena in the dry-type transformer, and improving the overall heat dissipation efficiency of the dry-type transformer. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the multi-channel circulating heat dissipation dry transformer structure according to an embodiment of the present invention.

[0014] Figure 2 This is a top view cross-sectional schematic diagram of the connection structure of the multi-channel circulating heat dissipation structure according to an embodiment of the present invention.

[0015] Figure 3 This is a side view of the multi-channel circulating heat dissipation structure according to an embodiment of the present invention.

[0016] Figure 4 This is a partial side cross-sectional view of the ventilation plate frame according to an embodiment of the present utility model.

[0017] In the diagram: 1. Dry-type transformer body; 11. Clamping component; 12. Low-voltage output copper busbar; 13. High-voltage terminal; 14. Base; 15. Mounting support; 2. Winding; 21. High-voltage connecting rod; 3. First exhaust plate; 31. Second exhaust plate; 32. Exhaust mesh; 33. Air guide cavity; 4. Ventilation plate frame; 41. First ventilation duct; 42. Second ventilation duct; 43. Third ventilation duct; 44. Streamlined guide plate; 45. Temperature sensor; 46. Connecting bracket; 5. Cooling fan. Detailed Implementation

[0018] Reference Figures 1 to 4 As shown, this utility model provides a multi-channel circulating heat dissipation dry-type transformer structure, including: a dry-type transformer body 1, with three sets of windings 2 partially arranged in the dry-type transformer body 1.

[0019] The outer side of the winding 2 is provided with a first exhaust plate 3 and a second exhaust plate 31. The inner arc surface of the first exhaust plate 3 and the second exhaust plate 31 is provided with an exhaust mesh 32. The inner side of the first exhaust plate 3 and the second exhaust plate 31 is provided with an air guide cavity 33. The rear end face of the first exhaust plate 3 and the second exhaust plate 31 is welded with a ventilation plate frame 4. The inner side of the ventilation plate frame 4 is provided with a first ventilation channel 41, a second ventilation channel 42 and a third ventilation channel 43. A cooling fan 5 is installed on the rear surface of the ventilation plate frame 4. The cooling fan 5 is connected to the air guide cavity 33 through the first ventilation channel 41, the second ventilation channel 42 and the third ventilation channel 43.

[0020] When the dry-type transformer body 1 is running, if the temperature sensor 45 detects that the temperature has risen too high, it will start the cooling fan 5. The cooling fan 5 will compress and deliver the external airflow to the first ventilation duct 41, the second ventilation duct 42 and the third ventilation duct 43 inside the ventilation plate frame 4. The airflow will then flow through the air guide duct 33 to the multiple sets of surrounding exhaust vents 32 on the arc surface of the first exhaust plate 3 and the second exhaust plate 31. The compressed airflow discharged from the exhaust vents 32 will flow over the surface of the dry-type transformer body 1, carrying away the heat from the surface of the dry-type transformer body 1, thereby achieving the effect of cooling and heat dissipation. This facilitates multi-directional exhaust and heat dissipation of the entire dry-type transformer body 1, avoids local overheating during the operation of the dry-type transformer body 1, improves the heat dissipation efficiency of the dry-type transformer body 1, and ensures the stable operation of the dry-type transformer body 1.

[0021] In this embodiment, a clamp 11 is installed on the upper end of the winding 2, and a low-voltage copper busbar 12 and a high-voltage terminal 13 are installed on the surface of the clamp 11. A base 14 is fixed to the lower end of the winding 2. A mounting leg 15 is welded to the lower end face of the base 14, and a high-voltage connecting rod 21 is connected to the front end face of the winding 2.

[0022] In a preferred embodiment, winding 2 is made of insulated copper or aluminum wire wound on an iron core, and consists of high-voltage and low-voltage coils responsible for electromagnetic induction and power transmission. It is an important component of the dry-type transformer body 1. The low-voltage outgoing copper busbar 12 is used to connect the low-voltage side conductive components of the transformer. The high-voltage terminal 13 is used to connect the dry-type transformer body 1 to the external power grid.

[0023] In this embodiment, the first exhaust plate 3 and the second exhaust plate 31 are arranged in a semi-encircling manner in the rear half of the winding 2; and the second exhaust plate 31 is located at the lower end of the first exhaust plate 3. The first exhaust plate 3 and the second exhaust plate 31 are connected to the exhaust mesh 32 through the air guide cavity 33.

[0024] As a preferred implementation, the semi-enclosed and surrounding first exhaust plate 3 and second exhaust plate 31 facilitate the more even distribution of exhaust net 32 ​​around the side of winding 2, so that the exhaust net 32 ​​can discharge compressed air to multiple directions on the surface of winding 2, thereby more evenly carrying away and dissipating the heat of dry transformer and reducing local overheating of dry transformer.

[0025] In this embodiment, the upper and lower ends of the ventilation plate frame 4 are fixed to the dry-type transformer body 1 through connecting brackets 46, and a streamlined guide plate 44 is welded to the front surface of the ventilation plate frame 4. A temperature sensor 45 is installed at the front end of the streamlined guide plate 44, and three sets of cooling fans 5 are arranged at the rear cavity of the ventilation plate frame 4.

[0026] In a preferred embodiment, three sets of cooling fans 5 respectively deliver compressed airflow to the first ventilation duct 41, the second ventilation duct 42, and the third ventilation duct 43. This compressed airflow is then diverted through the ventilation ducts to the air guide cavity 33, and finally discharged from the exhaust port 32. This allows airflow from multiple channels to flow through the entire dry-type transformer, improving the overall heat dissipation efficiency. The streamlined guide plate 44 facilitates the flow of air flowing behind the winding 2 to both sides, preventing the ventilation plate frame 4 from obstructing airflow. A temperature sensor 45 detects the surface temperature of the dry-type transformer body 1 to determine whether to activate the cooling fans 5 for forced air cooling.

[0027] This utility model's multi-channel circulating heat dissipation dry transformer structure effectively solves the problem in the prior art where the cooling fan on one side of the dry transformer accelerates local heat dissipation but fails to improve the overall heat dissipation efficiency of the dry transformer. It facilitates the airflow from multiple channels to flow through the entire dry transformer, accelerating airflow across the surface of the dry transformer, and more evenly carrying away and dissipating heat from the dry transformer. This reduces local overheating and improves the overall heat dissipation efficiency of the dry transformer, making it suitable for multi-channel circulating heat dissipation dry transformer structures.

Claims

1. A dry-type transformer structure with multi-channel circulating heat dissipation, comprising: A dry-type transformer body (1), wherein three sets of windings (2) are partially arranged in the dry-type transformer body (1), characterized in that: The outer side of the winding (2) is provided with a first exhaust plate (3) and a second exhaust plate (31). An exhaust mesh (32) is provided on the inner arc surface of the first exhaust plate (3) and the second exhaust plate (31). An air guide cavity (33) is opened on the inner side of the first exhaust plate (3) and the second exhaust plate (31). A ventilation plate frame (4) is welded on the rear end face of the first exhaust plate (3) and the second exhaust plate (31). A first ventilation channel (41), a second ventilation channel (42) and a third ventilation channel (43) are opened on the inner side of the ventilation plate frame (4). A cooling fan (5) is installed on the rear surface of the ventilation plate frame (4). The cooling fan (5) is connected to the air guide cavity (33) through the first ventilation channel (41), the second ventilation channel (42) and the third ventilation channel (43).

2. The dry-type transformer structure with multi-channel circulating heat dissipation according to claim 1, characterized in that, The upper end of the winding (2) is equipped with a clamp (11), and the surface of the clamp (11) is equipped with a low-voltage copper busbar (12) and a high-voltage terminal (13). The lower end of the winding (2) is fixed with a base (14).

3. The dry-type transformer structure with multi-channel circulating heat dissipation according to claim 2, characterized in that, The base (14) has mounting feet (15) welded to its lower end face, and the winding (2) has a high-voltage connecting rod (21) connected to its front end face.

4. The dry-type transformer structure with multi-channel circulating heat dissipation according to claim 1, characterized in that, The first exhaust plate (3) and the second exhaust plate (31) are arranged in a semi-encircling manner in the rear half of the winding (2); and the second exhaust plate (31) is located at the lower end of the first exhaust plate (3).

5. The dry-type transformer structure with multi-channel circulating heat dissipation according to claim 1, characterized in that, The first exhaust plate (3) and the second exhaust plate (31) are connected to the exhaust net (32) through the air guide cavity (33).

6. The dry-type transformer structure with multi-channel circulating heat dissipation according to claim 1, characterized in that, The upper and lower ends of the ventilation plate frame (4) are fixed to the dry-type transformer body (1) through the connecting bracket (46), and a streamlined guide plate (44) is welded to the front surface of the ventilation plate frame (4).

7. The dry-type transformer structure with multi-channel circulating heat dissipation according to claim 6, characterized in that, A temperature sensor (45) is installed at the front end of the streamlined guide plate (44), and three sets of cooling fans (5) are arranged at the rear cavity of the ventilation plate frame (4).

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