Cooling device for a dry-type transformer

Abstract

This utility model provides a cooling device for a dry-type transformer. The cooling device includes a cabinet, with a ventilation duct fixedly fitted to the bottom of the cabinet's inner cavity. A branch pipe is fixedly fitted to the top of the ventilation duct, and a cooling fan is fixedly installed at one end of the ventilation duct. This cooling device for a dry-type transformer, by setting guide plates, allows the cooling fan to be activated when the dry-type transformer is operating for an extended period. This enables the cooling fan to quickly transport outside air from the cabinet into the ventilation duct, and then through multiple branch pipes into the guide channel. The multiple guide plates then evenly guide the airflow inside the guide channel to the sides of the transformer body, achieving comprehensive heat dissipation and cooling of the transformer body. This avoids the problem of poor heat dissipation caused by irregular airflow inside the cabinet, thus greatly improving the cooling effect of the cooling device.

Description

Technical Field

[0001] This utility model relates to the field of transformer cooling devices, and more particularly to a cooling device for a dry-type transformer. Background Technology

[0002] The excitation dry-type transformer is a crucial component of a generator set. During normal operation, it converts the 13.8kV power supply to 400V to provide excitation power to the generator. During operation, the three windings of the excitation dry-type transformer generate significant heat, requiring six cross-flow fans for forced convection ventilation. Currently, the cooling fans of the excitation dry-type transformer are installed inside the transformer's protective casing, at the bottom of the windings, blowing upwards to create convection cooling. If the cooling fans malfunction, the high voltage inside the transformer's protective casing prevents repair and replacement, leading to the transformer's inability to dissipate heat due to lack of cooling air, forcing a shutdown of the transformer and the generator set.

[0003] Most existing dry-type transformers have cross-flow fans at the bottom of the windings without guide plates, resulting in low cooling efficiency of the upward cooling airflow. This fails to create effective forced convection cooling and leads to energy waste.

[0004] Therefore, it is necessary to provide a cooling device for dry-type transformers to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a cooling device for dry-type transformers, which solves the problem that most dry-type transformers have cross-flow fans at the bottom of the windings without guide plates, resulting in low cooling efficiency of the upward cooling air and failure to form effective forced convection cooling, thus causing energy waste.

[0006] To solve the above-mentioned technical problems, this utility model provides a cooling device for a dry-type transformer, including a cabinet. A ventilation duct is fixedly sleeved at the bottom of the cabinet's inner cavity, and a branch pipe is fixedly sleeved at the top of the ventilation duct. A cooling fan is fixedly installed at one end of the ventilation duct. A guide groove is provided on the side of the inner wall of the cabinet. A support plate is fixedly sleeved inside the cabinet, and a transformer body is fixedly installed on the top of the support plate. A guide plate is fixedly sleeved inside the guide groove. A partition is fixedly sleeved inside the cabinet. An exhaust pipe is fixedly sleeved at the top of the cabinet, and an adjustment mechanism is provided inside the exhaust pipe. A filter cover is fixedly sleeved at the top of the cooling fan.

[0007] Preferably, the guide plate is located above the branch pipe, and there are several guide plates, which are evenly distributed inside the guide groove.

[0008] Preferably, the number of cooling fans is two, and the two branch pipes are symmetrically distributed with the cabinet as the axis of symmetry.

[0009] Preferably, the height of the guide channel is the same as the height of the transformer body, and the guide channel and the partition are parallel to each other.

[0010] Preferably, the adjusting mechanism includes a positioning shaft, which is fixedly sleeved inside the exhaust pipe, and a baffle is fixedly sleeved outside the positioning shaft.

[0011] Preferably, the filter cover is adapted to the cooling fan, and the filter cover is made of stainless steel.

[0012] Compared with related technologies, the cooling device for a dry-type transformer provided by this utility model has the following beneficial effects:

[0013] This utility model provides a cooling device for a dry-type transformer. By setting up guide plates, when the dry-type transformer is working for a long time, the cooling fan is activated, which allows the cooling fan to quickly transport the air outside the cabinet to the ventilation duct, and then to the interior of the guide groove through multiple branch pipes. At this time, multiple guide plates can evenly guide the airflow inside the guide groove to the side of the transformer body, thereby achieving a comprehensive heat dissipation and cooling effect on the transformer body. This avoids the problem of poor heat dissipation of the transformer body caused by irregular airflow inside the cabinet, thus greatly improving the cooling effect of the cooling device.

[0014] By installing cooling fans, when the cooling fans drive the airflow inside the cabinet to flow rapidly, the two cooling fans can input the cooling airflow from both ends of the ventilation duct, so that the cooling airflow can flow rapidly into the cabinet from two directions, thereby increasing the flow speed of the cooling airflow inside the cabinet, that is, increasing the heat dissipation speed inside the cabinet. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of a cooling device for a dry-type transformer provided by this utility model;

[0016] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the cabinet in a cooling device for a dry-type transformer.

[0017] Figure 3 for Figure 1 The image shows a front view of a cooling device for a dry-type transformer.

[0018] The following are labeled in the diagram: 1. Cabinet; 2. Ventilation duct; 3. Branch pipe; 4. Refrigeration fan; 5. Guide channel; 6. Support plate; 7. Transformer body; 8. Guide plate; 9. Partition plate; 10. Exhaust duct; 11. Adjustment mechanism; 111. Positioning shaft; 112. Baffle; 12. Filter cover. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 A schematic diagram of a preferred embodiment of a cooling device for a dry-type transformer provided by this utility model; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the cabinet in a cooling device for a dry-type transformer. Figure 3 for Figure 1 The image shows a front view of a cooling device for a dry-type transformer. The cooling device includes a cabinet 1, a ventilation duct 2 fixedly fitted to the bottom of the inner cavity of the cabinet 1, a branch pipe 3 fixedly fitted to the top of the ventilation duct 2, a cooling fan 4 fixedly installed at one end of the ventilation duct 2, a guide groove 5 formed on the side of the inner wall of the cabinet 1, a support plate 6 fixedly fitted inside the cabinet 1, a transformer body 7 fixedly installed on the top of the support plate 6, a guide plate 8 fixedly fitted inside the guide groove 5, a partition plate 9 fixedly fitted inside the cabinet 1, an exhaust pipe 10 fixedly fitted to the top of the cabinet 1, an adjustment mechanism 11 provided inside the exhaust pipe 10, and a filter cover 12 fixedly fitted to the top of the cooling fan 4.

[0021] The guide plate 8 is located above the branch pipe 3. There are several guide plates 8, which are evenly distributed inside the guide groove 5. By setting the guide plates 8, when the dry-type transformer is working for a long time, the cooling fan 4 is started, which allows the cooling fan 4 to quickly deliver the air outside the cabinet 1 to the ventilation duct 2, and then deliver it to the inside of the guide groove 5 through multiple branch pipes 3. At this time, the multiple guide plates 8 can evenly guide the airflow inside the guide groove 5 to the side of the transformer body 7, thereby achieving a comprehensive heat dissipation and cooling effect on the transformer body 7. This avoids the problem of poor heat dissipation effect of the transformer body 7 caused by irregular flow of cooling air inside the cabinet 1, thus greatly improving the cooling effect of the cooling device.

[0022] There are two cooling fans 4, and the two branch pipes 3 are symmetrically distributed with the cabinet 1 as the axis of symmetry. By setting up cooling fans 4, when the cooling fans 4 drive the airflow inside the cabinet 1 to flow rapidly, the two cooling fans 4 can input the cooling airflow from both ends of the ventilation pipe 2, so that the cooling airflow can flow rapidly into the cabinet 1 from two directions, thereby increasing the flow speed of the cooling airflow inside the cabinet 1, that is, increasing the heat dissipation speed inside the cabinet 1.

[0023] The height of the guide channel 5 is the same as the height of the transformer body 7, and the guide channel 5 and the partition plate 9 are parallel to each other. By setting the guide channel 5, when the transformer is being cooled, multiple guide channels 5 can evenly guide the cooling airflow to the sides of multiple transformer bodies 7, so that the cooling airflow can flow steadily from the bottom of the transformer upwards, thereby improving the stability of the cooling airflow.

[0024] The adjustment mechanism 11 includes a positioning shaft 111, which is fixedly sleeved inside the exhaust pipe 10. A baffle 112 is fixedly sleeved outside the positioning shaft 111. By setting the adjustment mechanism 11, when it is necessary to adjust the cooling speed of a single transformer, the positioning shaft 111 is rotated, which causes the positioning shaft 111 to drive the baffle 112 to flip, thereby achieving the adjustment effect of the airflow channel inside the exhaust pipe 10, that is, achieving the flow rate of the cooling airflow, thus bringing convenience to the adjustment of the cooling speed of a single transformer.

[0025] The filter cover 12 is compatible with the cooling fan 4, and the filter cover 12 is made of stainless steel. By setting the filter cover 12, when the cooling fan 4 is working, the filter cover 12 can filter the airflow, thereby preventing the cooling fan 4 from being damaged when external debris enters the cooling fan 4, thus achieving the protective effect of the cooling device.

[0026] The working principle of the cooling device for a dry-type transformer provided by this utility model is as follows:

[0027] Step 1: When the dry-type transformer is working for a long time, start the cooling fan 4 so that the cooling fan 4 can quickly deliver the air outside the cabinet 1 into the ventilation duct 2, and then deliver it into the guide groove 5 through multiple branch pipes 3. At this time, multiple guide plates 8 can evenly guide the airflow inside the guide groove 5 to the side of the transformer body 7, thereby achieving a comprehensive heat dissipation and cooling effect on the transformer body 7. This avoids the problem of poor heat dissipation effect of the transformer body 7 when the cooling airflow inside the cabinet 1 flows irregularly, thus greatly improving the cooling effect of the cooling device. When the cooling fan 4 drives the airflow inside the cabinet 1 to flow quickly, the two cooling fans 4 can input the cooling airflow from both ends of the ventilation duct 2, so that the cooling airflow can flow quickly into the cabinet 1 from two directions, thereby increasing the flow speed of the cooling airflow inside the cabinet 1, that is, increasing the heat dissipation speed inside the cabinet 1.

[0028] Step 2: When the transformer is being cooled, multiple guide channels 5 can evenly guide the cooling airflow to the sides of multiple transformer bodies 7, so that the cooling airflow can flow stably from the bottom of the transformer upwards, thereby improving the stability of the cooling airflow. When it is necessary to adjust the cooling speed of a single transformer, the positioning shaft 111 is rotated, so that the positioning shaft 111 can drive the baffle 112 to flip, thereby achieving the effect of adjusting the airflow channel inside the exhaust pipe 10, that is, achieving the flow rate of the cooling airflow, thus bringing convenience to the adjustment of the cooling speed of a single transformer. When the cooling fan 4 is working, the filter cover 12 can filter the conveyed airflow, thereby preventing the cooling fan 4 from being damaged when external debris enters the cooling fan 4, thus achieving the protective effect of the cooling device.

[0029] Compared with related technologies, the cooling device for a dry-type transformer provided by this utility model has the following beneficial effects:

[0030] By setting up the air guide plate 8, when the dry-type transformer is working for a long time, the cooling fan 4 is activated, which allows the cooling fan 4 to quickly deliver the external air of the cabinet 1 into the ventilation duct 2, and then deliver it into the interior of the air guide groove 5 through multiple branch pipes 3. At this time, the multiple air guide plates 8 can evenly guide the airflow inside the air guide groove 5 to the side of the transformer body 7, thereby achieving a comprehensive heat dissipation and cooling effect on the transformer body 7. This avoids the problem of poor heat dissipation effect of the transformer body 7 caused by irregular flow of cooling air inside the cabinet 1, thus greatly improving the cooling effect of the cooling device.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. Cooling device for dry transformers comprising a cabinet (1), characterized in that: A ventilation duct (2) is fixedly fitted to the bottom of the inner cavity of the cabinet (1), a branch pipe (3) is fixedly fitted to the top of the ventilation duct (2), a cooling fan (4) is fixedly installed at one end of the ventilation duct (2), a guide groove (5) is provided on the side of the inner wall of the cabinet (1), a support plate (6) is fixedly fitted inside the cabinet (1), a transformer body (7) is fixedly installed on the top of the support plate (6), a guide plate (8) is fixedly fitted inside the guide groove (5), a partition plate (9) is fixedly fitted inside the cabinet (1), an exhaust pipe (10) is fixedly fitted to the top of the cabinet (1), an adjustment mechanism (11) is provided inside the exhaust pipe (10), and a filter cover (12) is fixedly fitted to the top of the cooling fan (4).

2. A cooling arrangement for a dry-type transformer according to claim 1, characterized in that The guide plate (8) is located above the branch pipe (3), and there are several guide plates (8), which are evenly distributed inside the guide groove (5).

3. A cooling arrangement for a dry-type transformer according to claim 1, characterized in that The number of cooling fans (4) is two, and the two branch pipes (3) are symmetrically distributed with the cabinet (1) as the axis of symmetry.

4. A cooling arrangement for a dry-type transformer according to claim 1, characterized in that The height of the guide groove (5) is the same as the height of the transformer body (7), and the guide groove (5) and the partition plate (9) are parallel to each other.

5. A cooling arrangement for a dry-type transformer according to claim 1, characterized in that, The adjustment mechanism (11) includes a positioning shaft (111), which is fixedly sleeved inside the exhaust pipe (10), and a baffle (112) is fixedly sleeved outside the positioning shaft (111).

6. A cooling arrangement for a dry-type transformer according to claim 1, characterized in that The filter cover (12) is adapted to the cooling fan (4), and the filter cover (12) is made of stainless steel.

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