Air flow guide blade of ventilating duct

Abstract

The utility model discloses a ventilating duct airflow guide vane, which is applied to the technical field of ventilating ducts and comprises a first support plate and a second support plate, a rotating shaft is rotatably connected between the first support plate and the second support plate, guide vanes are mounted on two sides of the surface of the rotating shaft, a circular turntable is rotatably connected in the first support plate, and a plurality of guide vanes are mounted in the circular turntable. The surface of the circular rotating disc is fixedly sleeved with an annular rack, and a gear meshed with the annular rack is welded to the end, close to the first supporting plate, of the rotating shaft. And the circular turntable is rotated to drive the annular rack to be meshed with the gear, so that all the guide vanes between the first support plate and the second support plate are driven to synchronously rotate to adjust the angle. And after the airflow flows between the two flow guide blades, the flowing direction can be changed, so that the flow guide direction of the airflow is adjusted, and the air outlet of the ventilation duct is more uniform.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation duct technology, and specifically relates to an airflow guide blade for ventilation ducts. Background Technology

[0002] Ventilation ducts are mainly used to facilitate the circulation of air inside a building. Since it is necessary to guide the direction of airflow, airflow guide vanes are used.

[0003] Currently, Chinese utility model patent CN220017655U discloses a ventilation duct guide device. However, existing ventilation ducts cannot adjust the internal airflow guide vanes as a whole. Therefore, airflow can only be guided in a single direction after passing through the airflow guide vanes, resulting in a fixed change in airflow direction. It is impossible to adjust the vane angle as needed, affecting the uniformity of airflow. Furthermore, the airflow guide vanes are generally fixed by integral welding. This means that when a single vane is damaged, the entire vane plate must be removed from the ventilation duct before the airflow guide vane can be disassembled and replaced independently, making it inconvenient to repair or replace damaged vanes. Utility Model Content

[0004] The purpose of this utility model is to provide an airflow guide vane for a ventilation duct, which has the advantages of facilitating the rotational adjustment of the guide angle of the airflow guide vane and allowing the vane to be independently disassembled for maintenance or replacement.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a ventilation duct airflow guide vane, including a first support plate and a second support plate, a rotating shaft rotatably connected between the first support plate and the second support plate, guide vanes installed on both sides of the surface of the rotating shaft, a circular turntable rotatably connected inside the first support plate, an annular rack fixedly sleeved on the surface of the circular turntable, and a gear meshing with the annular rack welded to one end of the rotating shaft near the first support plate.

[0006] Using the above technical solution, rotating a circular turntable drives a ring rack and gear to mesh, causing all the guide vanes between the first and second support plates to rotate synchronously and adjust their angles. Then, as the airflow passes between the two guide vanes, its flow direction changes, thereby adjusting the airflow direction and making the airflow from the ventilation duct more uniform. The two guide vanes are inserted into the surface of the rotating shaft and fixed by threaded rods and nuts. This allows the guide vanes to be disassembled without removing the rotating shaft, and each guide vane on the rotating shaft surface can be disassembled independently. This facilitates the replacement and maintenance of deformed or damaged guide vanes, improving practicality.

[0007] The present invention is further configured such that: slots are provided on both sides of the surface of the rotating shaft; a connecting sleeve that slides into the slot is welded to one end of the two guide vanes near the rotating shaft; a threaded rod that slides through the guide vane and is inserted into the slot; and nuts are threaded onto both ends of the surface of the threaded rod.

[0008] Using the above technical solution, the guide vanes can be disassembled without removing the rotating shaft, and the guide vanes on the surface of each rotating shaft can be disassembled independently, making it convenient to replace damaged guide vanes.

[0009] The present invention is further configured such that the rotating shaft and the guide vanes are installed in a ring array between the first support plate and the second support plate.

[0010] By adopting the above technical solution, the rotating shaft and guide vanes can guide the airflow in all directions in a 360-degree radius, thereby improving the uniformity of airflow.

[0011] The present invention is further configured such that: the interior of the second support plate has an air inlet, and the surface of the second support plate has mounting screw holes.

[0012] By using the above technical solution, the second support plate can be bolted to the ventilation duct by using bolts through the mounting holes, so that the airflow inside the ventilation duct can enter between the first and second support plates through the air inlet.

[0013] The present invention is further configured such that a sealing gasket is snapped onto the side of the second support plate away from the first support plate.

[0014] By adopting the above technical solution, the sealing performance of the second support plate bolted to the ventilation duct is improved, preventing air leakage from the gap between the second support plate and the ventilation duct.

[0015] The present invention is further configured such that: a handwheel that is rotatably connected to the first support plate is bolted to one end of the circular turntable away from the second support plate, and a limiting bolt that is threaded through the inside of the handwheel and engaged with the first support plate is connected to one end of the handwheel.

[0016] Using the above technical solution, the circular turntable is rotated inside the first support plate by turning the handwheel. At the same time, the limit bolt is locked to the first support plate after it engages with the handwheel thread, thereby limiting and fixing the circular turntable and preventing the guide vanes from rotating automatically.

[0017] The present invention is further configured such that: the top and bottom of the circular turntable are slidably connected with ball bearings that are rotatably connected to the first support plate.

[0018] By adopting the above technical solution, the frictional force of the circular turntable rotating inside the first support plate is reduced, thereby improving rotational stability.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. By rotating the circular turntable, the ring rack meshes with the gear, causing all the guide vanes between the first and second support plates to rotate synchronously and adjust their angles. Then, after the airflow passes between the two guide vanes, the flow direction changes, thereby adjusting the airflow direction and making the airflow from the ventilation duct more uniform.

[0021] 2. By inserting two guide vanes onto the surface of the rotating shaft and fixing them with threaded rods and nuts, the guide vanes can be disassembled without removing the rotating shaft. Furthermore, each guide vane on the rotating shaft surface can be disassembled independently, facilitating the replacement and repair of deformed or damaged guide vanes and improving practicality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0024] Figure 3 This is a top sectional view of a partial structure of this utility model;

[0025] Figure 4 This is a utility model Figure 2 Enlarged view of point A in the image.

[0026] Reference numerals in the attached drawings: 1. First support plate; 2. Second support plate; 3. Rotating shaft; 4. Guide vane; 5. Circular turntable; 6. Ring rack; 7. Gear; 8. Slot; 9. Connecting sleeve; 10. Threaded insert; 11. Nut; 12. Air inlet; 13. Mounting screw hole; 14. Sealing gasket; 15. Handwheel; 16. Limit bolt; 17. Ball bearing. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1:

[0029] refer to Figure 1 , Figure 2 , Figure 3A ventilation duct airflow guide vane includes a first support plate 1 and a second support plate 2. A rotating shaft 3 is rotatably connected between the first support plate 1 and the second support plate 2. Guide vanes 4 are installed on both sides of the rotating shaft 3. A circular turntable 5 is rotatably connected inside the first support plate 1. An annular rack 6 is fixedly fitted onto the surface of the circular turntable 5. A gear 7 that meshes with the annular rack 6 is welded to one end of the rotating shaft 3 near the first support plate 1. By rotating the circular turntable 5, the annular rack 6 meshes with the gear 7, causing all the guide vanes 4 between the first support plate 1 and the second support plate 2 to rotate synchronously and adjust their angles. Then, after the airflow passes between the two guide vanes 4, the flow direction can change, thereby adjusting the airflow direction and making the airflow from the ventilation duct more uniform.

[0030] refer to Figure 2 A handwheel 15, rotatably connected to the first support plate 1, is bolted to one end of the circular turntable 5 away from the second support plate 2. A limiting bolt 16, threaded through the handwheel 15 and engaged with the first support plate 1, is connected to one end of the handwheel 15. Twisting the handwheel 15 causes the circular turntable 5 to rotate inside the first support plate 1. Simultaneously, rotating the limiting bolt 16 engages with the threaded handwheel 15, securing it to the first support plate 1, thus limiting and fixing the circular turntable 5 and preventing the guide vanes 4 from rotating automatically.

[0031] refer to Figure 2 The top and bottom of the circular turntable 5 are slidably connected to ball bearings 17 that are rotatably connected to the first support plate 1. This reduces the friction of the circular turntable 5 rotating inside the first support plate 1 and improves rotational stability.

[0032] Brief description of the operation: Rotating the circular turntable 5 drives the annular rack 6 to rotate. Then, the annular rack 6 meshes with the gears 7, causing them to synchronously drive all the gears 7 inside the first support plate 1 to rotate in the same direction. This, in turn, drives the rotating shaft 3 between the first support plate 1 and the second support plate 2, as well as the guide vanes 4 on the surface, to rotate, causing the rotation angle of the guide vanes 4 to change. Thus, the guide vanes 4 can be adjusted to guide the airflow direction as needed.

[0033] Example 2:

[0034] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4A ventilation duct airflow guide vane is disclosed. A groove 8 is provided on both sides of the surface of a rotating shaft 3. Two guide vanes 4 are welded to one end of the rotating shaft 3 with a connecting sleeve 9 that slides into the groove 8. A threaded rod 10, which also slides into the groove 8, passes through the interior of each guide vane 4. Nuts 11 are threaded onto both ends of the threaded rod 10. By inserting the two guide vanes 4 onto the surface of the rotating shaft 3 and fixing them with the threaded rod 10 and nuts 11, the guide vanes 4 can be disassembled without removing the rotating shaft 3. Furthermore, each guide vane 4 on the surface of the rotating shaft 3 can be disassembled independently, facilitating the replacement and maintenance of deformed or damaged guide vanes 4 and improving practicality.

[0035] refer to Figure 3 The rotating shaft 3 and the guide vanes 4 are installed in a ring array between the first support plate 1 and the second support plate 2. This allows the rotating shaft 3 and the guide vanes 4 to guide the airflow in all directions for 360 degrees, improving the uniformity of airflow.

[0036] refer to Figure 1 , Figure 2 The second support plate 2 has an air inlet 12 inside and a mounting screw hole 13 on its surface. By using bolts through the mounting screw hole 13, the second support plate 2 can be fastened to the ventilation duct, allowing airflow inside the ventilation duct to enter between the first support plate 1 and the second support plate 2 through the air inlet 12.

[0037] refer to Figure 1 , Figure 2 A sealing gasket 14 is snapped onto the side of the second support plate 2 away from the first support plate 1. This improves the sealing performance of the second support plate 2 when it is bolted to the ventilation duct, preventing air leakage from the gap between the second support plate 2 and the ventilation duct.

[0038] Brief description of usage: By engaging the threaded nut 11 with the threaded rod 10, remove the nut 11 from both ends of the threaded rod 10. Then, pull the threaded rod 10 out of the rotating shaft 3 and pull the guide vane 4 to slide the connecting sleeve 9 out of the slot 8, thus disassembling the guide vane 4. After replacing the guide vane 4, insert the connecting sleeve 9 back into the slot 8, and then thread the threaded rod 10 through both the connecting sleeve 9 and the rotating shaft 3, securing both ends with the nuts 11 to limit and fix the guide vane 4.

[0039] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A ventilation duct airflow guide vane, comprising a first support plate (1) and a second support plate (2), characterized in that: A rotating shaft (3) is rotatably connected between the first support plate (1) and the second support plate (2). Guide vanes (4) are installed on both sides of the surface of the rotating shaft (3). A circular turntable (5) is rotatably connected inside the first support plate (1). A ring rack (6) is fixedly sleeved on the surface of the circular turntable (5). A gear (7) that meshes with the ring rack (6) is welded to one end of the rotating shaft (3) near the first support plate (1).

2. The airflow guide vane for a ventilation duct according to claim 1, characterized in that: The rotating shaft (3) has slots (8) on both sides of its surface. The two guide vanes (4) are welded with connecting sleeves (9) that slide into the slots (8) at one end near the rotating shaft (3). The guide vanes (4) are connected to threaded rods (10) that slide into the slots (8) through their interiors. Nuts (11) are threaded onto both ends of the threaded rods (10).

3. The airflow guide vane for a ventilation duct according to claim 1, characterized in that: The rotating shaft (3) and the guide vanes (4) are installed in a ring array between the first support plate (1) and the second support plate (2).

4. The airflow guide vane for a ventilation duct according to claim 1, characterized in that: The second support plate (2) has an air inlet (12) inside and a mounting screw hole (13) on its surface.

5. The airflow guide vane for a ventilation duct according to claim 1, characterized in that: A sealing gasket (14) is snapped onto the side of the second support plate (2) away from the first support plate (1).

6. The airflow guide vane for a ventilation duct according to claim 1, characterized in that: The end of the circular turntable (5) away from the second support plate (2) is bolted with a handwheel (15) that is rotatably connected to the first support plate (1). One end of the handwheel (15) is threaded through and connected to a limiting bolt (16) that is engaged with the first support plate (1).

7. The airflow guide vane for a ventilation duct according to claim 1, characterized in that: The top and bottom of the circular turntable (5) are slidably connected to ball bearings (17) that are rotatably connected to the first support plate (1).

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