An axial flow fan

Abstract

The utility model belongs to axial flow fan technical field especially relates to a kind of axial flow fan, comprising: axial flow fan body, the output end detachably installed flow guide pipe of axial flow fan body;Flow guide pipe upper end is equipped with flow guide box, and the both sides of the inner chamber of flow guide box are rotatably equipped with rotating stand one and rotating stand two, and rotating stand one is equipped with flow guide plate one, and rotating stand two is equipped with flow guide plate two, for the air flow guiding of air is carried out.The utility model has the advantages that the air flow of blowing can be cooled, the cooling effect is improved, and the flow direction can be adjusted according to needs, and the position required by transformer is cooled.

Description

Technical Field

[0001] This utility model belongs to the field of axial flow fan technology, and in particular relates to an axial flow fan. Background Technology

[0002] In transformer cooling, the airflow utilization rate of axial flow fans directly affects the cooling effect. Current cooling solutions suffer from wasted airflow: the airflow at the fan outlet is not directed in any direction, with a large amount of airflow blown towards areas that do not require cooling or blocked by equipment obstructions. This results in insufficient airflow to effectively cooled areas, leading to low cooling efficiency, increased energy consumption, and potentially affecting the transformer's operational stability due to untimely heat dissipation.

[0003] Chinese patent discloses an axial flow fan (authorization announcement number CN207795606U). The patented technology mainly includes two sets of fan blades, which are arranged sequentially in the air guiding direction of the axial flow fan and have opposite bending directions; and a drive component, which is connected to the fan blades located on the air outlet side of the axial flow fan to drive them to rotate.

[0004] However, this patent still has shortcomings. When using axial flow fans to cool transformers, the fans cannot adjust the airflow direction as needed, resulting in insufficient airflow to the effectively cooled parts of the transformer and low cooling efficiency. Therefore, those skilled in the art have provided an axial flow fan to solve the problems mentioned in the background. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing an axial flow fan that can cool the blown airflow, improve the cooling effect, and adjust the flow direction as needed to cool the required location on the transformer.

[0006] In view of this, the present invention provides an axial flow fan, comprising: An axial flow fan body, wherein a guide pipe can be detachably installed at the output end of the axial flow fan body; A flow guide box is installed at the upper end of the flow guide pipe. Rotating frame one and rotating frame two are rotatably installed on both sides of the inner cavity of the flow guide box. A flow guide plate one is installed on rotating frame one, and a flow guide plate two is installed on rotating frame two, which are used to guide the air.

[0007] Furthermore, a corrugated connector is provided between the first rotating frame and the second rotating frame to seal the gap between the first rotating frame and the second rotating frame. A corrugated connector is provided between the first rotating frame and the inner cavity of the guide box, and a corrugated connector is provided between the second rotating frame and the inner cavity of the guide box to seal the gap between the first rotating frame, the second rotating frame and the guide box.

[0008] Furthermore, a flange is fixed to the output end of the axial flow fan body, and a flange is fixed to the lower end of the guide pipe. The flange and the flange are fitted together and connected by a bolt.

[0009] Furthermore, it also includes a limiting frame, the end of which has a slot, and flange one and flange two that fit together are inserted into the slot.

[0010] Furthermore, both ends of the limiting frame are fixed with connecting plates, which are attached to the connecting plates on another limiting frame, and the two attached connecting plates are connected by bolts with two threads.

[0011] Furthermore, a water-cooled heat exchanger is installed inside the guide tube, with a first pipe installed at the end of the water-cooled heat exchanger and a second pipe installed at the end of the water-cooled heat exchanger away from the first pipe.

[0012] Furthermore, the flow guide box has a vertical through groove that connects to the inner cavity of the flow guide pipe.

[0013] Furthermore, a second motor is installed at the front end of the flow guide box, and the drive end of the second motor is connected to the first rotating frame.

[0014] Furthermore, a motor is installed at the front end of the flow guide box, and the drive end of the motor is connected to a rotating frame.

[0015] Furthermore, both the first and second guide vanes are spindle-shaped, and the upper ends of the first and second guide vanes are flush with the upper end of the guide box.

[0016] Compared with the prior art, the axial flow fan of this utility model has the following advantages: When this utility model is needed to cool a transformer, after the device is installed, the axial flow fan is started, and then cold water is introduced into the first pipe. The cold water enters the water-cooled heat exchanger, and the air blown out by the axial flow fan enters the guide pipe. The water-cooled heat exchanger can cool the blown air. Then, as needed, motor one and motor two are started, so that guide plate one and guide plate two rotate to a suitable angle. The cooled air enters the guide box and is then guided out through guide plate one and guide plate two, cooling the parts of the transformer that need cooling. This achieves the goal of cooling the blown airflow and improving the cooling effect. At the same time, the guide direction can be adjusted as needed to achieve the effect of cooling the required parts of the transformer. Attached Figure Description

[0017] Figure 1 This is a first-view perspective three-dimensional schematic diagram of this utility model; Figure 2 This is a second-view perspective three-dimensional schematic diagram of the present invention; Figure 3This is a three-dimensional schematic diagram of the axial flow fan body of this utility model; Figure 4 This is a sectional view of the connection between flange one and flange two of this utility model; Figure 5 This is the utility model Figure 4 Enlarged view of point A; Figure 6 This is a three-dimensional schematic diagram of the limiting frame of this utility model; Figure 7 This is a top view of the air guide box of this utility model; Figure 8 This is a three-dimensional schematic diagram of the guide plate of this utility model; The markings in the diagram are as follows: 1. Axial flow fan body; 2. Limiting frame; 3. Pipe 1; 4. Flow guide box; 5. Motor 1; 6. Pipe 2; 7. Flow guide pipe; 8. Rotating frame 1; 9. Flow guide plate 1; 10. Rotating frame 2; 11. Flow guide plate 2; 12. Motor 2; 13. Flange 1; 14. Water-cooled heat exchanger; 15. Bolt 1; 16. Bolt 2; 17. Connecting plate; 18. Slot; 19. Through slot; 20. Flange 2; 21. Corrugated connector. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0019] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical 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 this utility model based on the specific circumstances.

[0021] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] Please see Figures 1 to 8 The embodiments provided by this utility model are as follows: Example: An axial flow fan, comprising: Axial flow fan body 1, with a detachable guide pipe 7 installed at the output end of the axial flow fan body 1; A flow guide box 4 is installed at the upper end of the flow guide pipe 7. Rotating frame 8 and rotating frame 10 are rotatably installed on both sides of the inner cavity of the flow guide box 4. A flow guide plate 9 is installed on the rotating frame 8, and a flow guide plate 11 is installed on the rotating frame 10, which are used to guide the air.

[0023] In the example of this application, rotatable rotating frames 8 and 10 are respectively installed on both sides of the inner cavity of the guide box 4. A guide plate 9 is fixedly installed on the rotating frame 8, and a guide plate 11 is fixedly installed on the rotating frame 10, allowing for flexible adjustment of the fan's airflow direction. When facing different cooling requirements of the transformer, operators can rotate the rotating frame 8 and 10 to adjust the angle of the guide plates 9 and 11, precisely directing the airflow generated by the fan to the effective cooling area of ​​the transformer. This fundamentally avoids the waste of airflow caused by blowing into useless locations or being blocked by obstructions, significantly reducing ineffective airflow loss and significantly improving the cooling efficiency of the axial flow fan for the transformer. Simultaneously, the detachable connection between the guide pipe 7 and the axial flow fan body 1 provides great convenience for subsequent equipment maintenance and component replacement, eliminating the need for large-scale disassembly of the entire fan system, reducing maintenance costs and operational difficulty.

[0024] Furthermore, a corrugated connector 21 is provided between the first rotating frame 8 and the second rotating frame 10 to seal the gap between the first rotating frame 8 and the second rotating frame 10. A corrugated connector 21 is provided between the first rotating frame 8 and the inner cavity of the guide box 4, and a corrugated connector 21 is provided between the second rotating frame 10 and the inner cavity of the guide box 4 to seal the gap between the first rotating frame 8, the second rotating frame 10 and the guide box 4.

[0025] As a preferred example of this utility model, a corrugated connector (21) is installed between the first rotating frame (8) and the second rotating frame (10). This seals the gap between the two rotating frames, preventing airflow from leaking through the gap between the first rotating frame (8) and the second rotating frame (10) when the airflow flows inside the guide box (4). This ensures that the airflow entering the guide box (4) flows in the direction guided by the first guide plate (9) and the second guide plate (11), avoiding air supply loss caused by airflow leakage. Furthermore, corrugated connectors (21) are also installed between the first rotating frame (8) and the inner cavity of the guide box (4), and between the second rotating frame (10) and the inner cavity of the guide box (4), respectively, to seal the gap between the rotating frame and the fixed guide box (4), further blocking the path of airflow leakage. In addition, the corrugated connector (21) itself has good flexibility and deformation capability. When the rotating frame one (8) and rotating frame two (10) are rotated to adjust the angle, the corrugated connector (21) can deform synchronously with the movement of the rotating frame. It will not hinder the normal rotation of the rotating frame, and can always maintain a tight fit with the inner cavity of the rotating frame and the guide box (4), ensuring that the sealing state is not interrupted throughout the adjustment process.

[0026] Furthermore, flange 13 is fixed at the output end of the axial flow fan body 1, and flange 20 is fixed at the lower end of the guide pipe 7. Flange 13 fits into flange 20, and flange 13 and flange 20 are connected by bolt 15.

[0027] As a preferred example of this utility model, the threaded connection of bolt 15 is detachable. When it is necessary to maintain or replace the guide pipe 7, or adjust the position of the guide pipe 7 according to the actual cooling requirements, simply remove bolt 15 to separate the guide pipe 7 from the axial flow fan body 1. The operation is simple and convenient, which improves the flexibility and convenience of equipment use and reduces the difficulty of later maintenance.

[0028] Furthermore, it also includes a limiting frame 2, with a slot 18 at the end of the limiting frame 2, and flange 13 and flange 20 that fit together are inserted into the slot 18.

[0029] As a preferred example of this utility model, after the flange 13 and flange 20 are fitted and bolted together, the fitted flange 13 and flange 20 are inserted as a whole into the slot 18 of the limiting frame 2. The limiting frame 2 provides additional limiting and fixing for the flange connection, effectively restricting the relative displacement of flange 13 and flange 20 in the horizontal direction. The limiting frame 2 prevents the flange connection from loosening due to vibration, enhances the stability of the connection structure between the axial flow fan body 1 and the guide pipe 7, and ensures continuous and stable airflow. At the same time, the encasing effect of the slot 18 on flange 13 and flange 20 also protects the flange connection to a certain extent, reduces the erosion of the connection structure by external dust, moisture, and other factors, extends the service life of the equipment, and reduces the probability of equipment failure due to external environmental influences.

[0030] Furthermore, both ends of the limiting frame 2 are fixed with connecting plates 17, which are in contact with the connecting plate 17 on another limiting frame 2, and the two in contact connecting plates 17 are connected by bolts 16.

[0031] As a preferred example of this utility model, the threaded connection of bolt 216 also facilitates the disassembly and assembly of the limit frame 2. When the equipment needs maintenance, multiple limit frames 2 can be disassembled simply by removing bolt 216, without hindering the disassembly operation of the flange connection, thus improving the applicability of the equipment in different scenarios.

[0032] Furthermore, a water-cooled heat exchanger 14 is installed inside the guide pipe 7, and a pipe 3 is installed at the end of the water-cooled heat exchanger 14, while a pipe 6 is installed at the end of the water-cooled heat exchanger 14 away from the pipe 3.

[0033] As a preferred example of this utility model, when the airflow output from the axial fan body 1 passes through the guide pipe 7, it undergoes sufficient heat exchange with the water-cooled heat exchanger 14. The air temperature is further reduced during this heat exchange process. Then, the air is guided through the guide box 4 to the cooling section of the transformer, significantly improving the cooling effect and efficiency. Simultaneously, the arrangement of pipes 3 and 6 facilitates the connection of the water-cooled heat exchanger 14 to an external cooling water source. Coolant is supplied to the water-cooled heat exchanger 14 via pipe 3, and discharged through pipe 6 after heat exchange, achieving continuous circulation of the coolant within the water-cooled heat exchanger 14. This circulation ensures the continuous and stable heat exchange performance of the water-cooled heat exchanger 14, preventing a decrease in heat exchange efficiency due to increased coolant temperature. This enhances the overall cooling reliability of the equipment and ensures effective temperature control even under high transformer load conditions, guaranteeing the safe and stable operation of the transformer.

[0034] In the cooling process of the water-cooled heat exchanger 14, the high-temperature medium flows in the shell side, while the low-temperature cooling water flows in the tube side. Heat is transferred from the high-temperature medium to the low-temperature cooling water through the tube walls, achieving heat transfer and cooling of the medium. When the high-temperature medium flows through the shell side, its heat is transferred to the cooling water inside the tubes through the tube walls. The cooling water continuously absorbs heat and its temperature rises during its flow inside the tubes, while the high-temperature medium releases heat and its temperature decreases.

[0035] Furthermore, the flow guide box 4 has a vertical through groove 19, and the through groove 19 is connected to the inner cavity of the flow guide pipe 7.

[0036] As a preferred example of this utility model, a smooth channel is provided for the air volume to enter the guide box 4 from the guide pipe 7. After the air output by the fan flows through the guide pipe 7, it can directly enter the interior of the guide box 4 through the through slot 19, which effectively reduces the resistance and loss of air volume during transmission. This ensures that the air volume output by the fan can enter the guide box 4 efficiently, and then be transported to the transformer cooling part by the guiding action of the first guide plate 9 and the second guide plate 11, thereby improving the utilization rate of air volume and reducing the loss of ineffective air volume.

[0037] Furthermore, a second motor 12 is installed at the front end of the flow guide box 4, and the drive end of the second motor 12 is connected to the rotating frame 8.

[0038] As a preferred example of this utility model, the rotating frame 8 can be driven by the motor 12 to rotate. The rotation of the rotating frame 8 will cause the guide plate 9 fixedly connected to it to adjust its angle synchronously. There is no need for the staff to manually adjust the angle of the rotating frame 8, which not only reduces the labor intensity of manual operation, but also enables precise adjustment of the rotation angle of the rotating frame 8 through the precise control of the motor 12, thereby precisely adjusting the guiding direction of the guide plate 9. This allows the air volume to be more accurately directed to the parts of the transformer that need cooling, improving the convenience of operation and the guiding accuracy.

[0039] Furthermore, a motor 5 is installed at the front end of the flow guide box 4, and the drive end of the motor 5 is connected to the rotating frame 10.

[0040] As a preferred example of this utility model, when motor 5 is working, it drives the rotating frame 10 to rotate, which in turn drives the guide plate 11 fixed on the rotating frame 10 to adjust its angle. Through the coordinated work of motor 5 and motor 12, the angles of guide plate 11 and guide plate 9 can be adjusted independently and precisely. The two work together to achieve multi-angle and precise airflow guidance, which can better adapt to the cooling needs of different parts of the transformer. Whether it is a region of the transformer with severe local heat generation or a region that needs overall cooling, the airflow can be accurately delivered to the target area by adjusting the angles of guide plate 9 and guide plate 11.

[0041] Furthermore, both the first guide plate 9 and the second guide plate 11 are spindle-shaped, and the upper ends of the first guide plate 9 and the second guide plate 11 are flush with the upper end of the guide box 4.

[0042] As a preferred example of this utility model, the streamlined shape of the shuttle structure effectively reduces the frictional resistance between the airflow and the surface of the guide plate. When the airflow enters the guide box 4 from the guide pipe 7 and flows through the first guide plate 9 and the second guide plate 11, it can be more smoothly guided to the transformer cooling area along the surface of the guide plate, reducing energy loss of airflow during the guiding process, ensuring effective airflow delivery, and allowing more airflow to act on the cooling area of ​​the transformer, thus improving cooling efficiency. At the same time, the shuttle structure can also effectively reduce the eddies generated by the airflow on the surface of the guide plate. The reduction of eddies can avoid deviations in airflow guidance caused by airflow turbulence, further improving the stability and accuracy of airflow guidance, and ensuring the efficient performance of the cooling effect.

[0043] In this embodiment, when cooling of the transformer is required, the axial flow fan body 1 is started, and the axial flow fan body 1 begins to generate airflow for cooling. The airflow is then transported into the guide pipe 7 at the output end. At the same time, cold water is introduced into the pipe 3 at one end of the water-cooled heat exchanger 14 installed in the inner cavity of the guide pipe 7. The cold water enters the internal channel of the water-cooled heat exchanger 14 through the pipe 3, forming a continuous cold water circulation system within the water-cooled heat exchanger 14. After absorbing heat, the cold water is discharged through the pipe 6 at the other end of the water-cooled heat exchanger 14 for subsequent recycling.

[0044] When the airflow blown out by the axial fan body 1 enters the guide pipe 7, the airflow will come into contact with the water-cooled heat exchanger 14 inside the guide pipe 7. During the contact process, the heat in the airflow is absorbed by the cold water inside the water-cooled heat exchanger 14, and the airflow temperature decreases accordingly, forming a cooler airflow with a lower temperature. Subsequently, motors 5 and 12, installed at the front end of the air guide box 4, are activated. The drive end of motor 12 is connected to a rotating frame 8 on one side of the inner cavity of the air guide box 4. After motor 12 starts, it drives the rotating frame 8 to rotate, and the air guide plate 9 fixed on the rotating frame 8 rotates synchronously with it. The drive end of motor 5 is connected to a rotating frame 10 on the other side of the inner cavity of the air guide box 4. After motor 5 starts, it drives the rotating frame 10 to rotate, and the air guide plate 11 fixed on the rotating frame 10 rotates synchronously with it. By controlling the operation of motors 5 and 12, the air guide plate 9 and air guide plate 11 can be adjusted to the appropriate angle required for cooling. Simultaneously, the corrugated connectors 21 between air guide plate 9 and air guide plate 11, between air guide plate 9 and the inner cavity of the air guide box 4, and between air guide plate 11 and the inner cavity of the air guide box 4 will adapt to the rotation of the air guide plates, maintaining a good seal and preventing cooling airflow leakage from the gaps. The cooling airflow, after being cooled by the water-cooled heat exchanger 14, continues to flow forward within the guide pipe 7, eventually entering the inner cavity of the guide box 4 smoothly through the vertically penetrating groove 19 that connects to the inner cavity of the guide pipe 7. The cooling airflow entering the inner cavity of the guide box 4 is guided by the guide plates 9 and 11, which are adjusted to appropriate angles, changing its flow direction and directing it to the specific location on the transformer requiring cooling. This achieves cooling of the target area of ​​the transformer, effectively controlling the transformer's operating temperature and ensuring its safe and stable operation. It achieves the effect of cooling the blown airflow, improving the cooling effect, and allowing for adjustment of the flow direction as needed to cool the required locations on the transformer.

[0045] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An axial flow fan, characterized in that, include: Axial flow fan body (1), the output end of which can be detachably installed with a guide pipe (7); The upper end of the guide pipe (7) is equipped with a guide box (4). The inner sides of the guide box (4) are respectively rotatably equipped with a rotating frame one (8) and a rotating frame two (10). The rotating frame one (8) is equipped with a guide plate one (9), and the rotating frame two (10) is equipped with a guide plate two (11) for guiding air.

2. An axial flow fan according to claim 1, characterized in that, A corrugated connector (21) is provided between the first rotating frame (8) and the second rotating frame (10) to close the gap between the first rotating frame (8) and the second rotating frame (10). A corrugated connector (21) is provided between the first rotating frame (8) and the inner cavity of the guide box (4). A corrugated connector (21) is provided between the second rotating frame (10) and the inner cavity of the guide box (4) to close the gap between the first rotating frame (8), the second rotating frame (10) and the guide box (4).

3. An axial flow fan according to claim 1, characterized in that, The output end of the axial flow fan body (1) is fixed with flange one (13), and the lower end of the guide pipe (7) is fixed with flange two (20). Flange one (13) and flange two (20) are fitted together, and flange one (13) and flange two (20) are threadedly connected by bolt one (15).

4. An axial flow fan according to claim 3, characterized in that, It also includes a limiting frame (2), the end of which is provided with a slot (18), and flange one (13) and flange two (20) that fit together are inserted into the slot (18).

5. An axial flow fan according to claim 4, characterized in that, Both ends of the limiting frame (2) are fixed with connecting plates (17). The connecting plates (17) are in contact with the connecting plates (17) on another limiting frame (2), and the two in contact connecting plates (17) are connected by bolts (16).

6. An axial flow fan according to claim 1, characterized in that, The inner cavity of the guide pipe (7) is provided with a water-cooled heat exchanger (14), and a pipe (3) is installed at the end of the water-cooled heat exchanger (14). A pipe (6) is installed at the end of the water-cooled heat exchanger (14) away from the pipe (3).

7. An axial flow fan according to claim 1, characterized in that, The flow guide box (4) has a through groove (19) that runs vertically through it, and the through groove (19) connects to the inner cavity of the flow guide pipe (7).

8. An axial flow fan according to claim 1, characterized in that, The front end of the guide box (4) is equipped with a second motor (12), and the drive end of the second motor (12) is connected to the rotating frame (8).

9. An axial flow fan according to claim 1, characterized in that, The front end of the flow guide box (4) is equipped with a motor (5), and the drive end of the motor (5) is connected to the rotating frame (10).

10. An axial flow fan according to claim 1, characterized in that, Both the first guide plate (9) and the second guide plate (11) are spindle-shaped, and the upper ends of the first guide plate (9) and the second guide plate (11) are flush with the upper end of the guide box (4).

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