Rectangular ventilation butterfly valve

Abstract

The utility model relates to the technical field of rectangular ventilation butterfly valves, and discloses a rectangular ventilation butterfly valve which comprises a valve body, a rubber air bag, a driving mechanism and an air bag adjusting mechanism, the rubber air bag is arranged at the edge position of the side face of a valve plate, and the rubber air bag is arranged in a mechanism box on the side face of the valve body. A driving mechanism is arranged on the mechanism box, an air bag adjusting mechanism is arranged in the mechanism box, an air guide hose is arranged between the air bag adjusting mechanism and the rubber air bag, and when the driving mechanism drives the valve plate to be closed, the air bag can be controlled to expand through the air bag adjusting mechanism, so that when the valve plate is closed, the air bag can be extruded and attached to the U-shaped blocking edge; therefore, the gap is automatically filled.

Description

A rectangular ventilation butterfly valve Technical Field

[0001] This utility model relates to the technical field of rectangular ventilation butterfly valves, specifically a rectangular ventilation butterfly valve. Background Technology

[0002] A rectangular ventilation butterfly valve is a valve specifically designed for use in rectangular ventilation ducts to regulate or cut off airflow. It is a special type of butterfly valve where the valve plate is rectangular rather than the traditional circular shape.

[0003] Currently, some traditional rectangular ventilation butterfly valves on the market typically have a baffle on the inner wall of the valve body. After the valve plate rotates and closes, it will contact the baffle to form a closed seal, thereby cutting off the airflow. However, this method of closing and sealing will cause the gap between the valve plate and the baffle to increase due to wear and deformation of the baffle or shaking of the valve plate under the impact of wind, resulting in air leakage, which needs to be improved.

[0004] Therefore, we propose a rectangular ventilation butterfly valve to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of some traditional rectangular ventilation butterfly valves, which generally have a baffle on the inner wall of the valve body. After the valve plate rotates and closes, it will contact the baffle to form a closed seal, thereby cutting off the airflow. However, this method of closing and sealing will cause the gap between the valve plate and the baffle to increase due to wear and deformation of the baffle or shaking of the valve plate under the impact of wind, thus leading to the problem of air leakage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rectangular ventilation butterfly valve, comprising: a valve body, a valve plate disposed within the valve body, a hollow shaft connected to the center of the valve plate, a U-shaped retaining edge disposed on the inner wall of the valve body, and a mechanism box disposed on the side of the valve body;

[0007] A rubber airbag is located on the edge of the side of the valve plate.

[0008] The drive mechanism is mounted on the mechanism box;

[0009] An airbag adjustment mechanism is installed inside the mechanism box, and an air guide hose is provided between the airbag adjustment mechanism and the rubber airbag.

[0010] Furthermore, the driving mechanism includes a drive motor, a first drive gear, a second drive gear, and a third drive gear. The drive motor is disposed on the side of the mechanism box. The first drive gear, the second drive gear, and the third drive gear are all disposed inside the mechanism box. The second drive gear is sleeved on the surface of the hollow shaft. The first drive gear and the third drive gear are both meshed with the second drive gear. A rotating shaft is disposed at the center of the first drive gear, and the rotating shaft is connected to the drive motor.

[0011] Furthermore, the airbag adjustment mechanism includes an adjustment box, a piston plate is provided inside the adjustment box, a threaded column is connected to the side of the piston plate, a threaded hole is provided at the center of the third drive gear and is threadedly connected to the threaded column, and the adjustment box is connected to the air guide hose.

[0012] Furthermore, a sealing rubber ring is provided on the piston plate.

[0013] Furthermore, a support plate is provided inside the mechanism box, and an adaptation groove adapted to the third drive gear is provided on the support plate. Multiple evenly distributed balls are provided on the inner wall of the adaptation groove, and an annular groove adapted to the balls is provided on the third drive gear.

[0014] Furthermore, the valve body has a cavity that communicates with the hollow shaft, and the cavity is adapted to the air guide hose.

[0015] Furthermore, mounting plates are symmetrically arranged on the surface of the valve body, and mounting holes are provided on the mounting plates.

[0016] The beneficial effects of this utility model are as follows: By providing a rubber airbag at the edge of the valve plate side, a rubber airbag in the mechanism box on the side of the valve body, a drive mechanism on the mechanism box, an airbag adjustment mechanism in the mechanism box, and a flexible air guide tube between the airbag adjustment mechanism and the rubber airbag, the airbag can be controlled to expand by the airbag adjustment mechanism when the drive mechanism drives the valve plate to close. Thus, when the valve plate is closed, the airbag will be squeezed and fitted against the U-shaped baffle, thereby automatically filling the gap. Attached Figure Description

[0017] Figure 1 is a structural schematic diagram of the rectangular ventilation butterfly valve of this utility model;

[0018] Figure 2 is a first cross-sectional view of the rectangular ventilation butterfly valve of this utility model.

[0019] Figure 3 is a second cross-sectional view of the rectangular ventilation butterfly valve of this utility model.

[0020] Figure 4 is a schematic diagram of the first part of the rectangular ventilation butterfly valve of this utility model;

[0021] Figure 5 is a schematic diagram of the second part of the rectangular ventilation butterfly valve of this utility model;

[0022] Figure 6 is an enlarged schematic diagram of part of structure A in Figure 5 of this utility model;

[0023] Figure 7 is a cross-sectional view of the second part of the rectangular ventilation butterfly valve of this utility model;

[0024] Figure 8 is an enlarged schematic diagram of part of structure B in Figure 7 of this utility model.

[0025] The names corresponding to each mark in the diagram:

[0026] 1. Valve body; 2. Valve plate; 3. Hollow shaft; 4. U-shaped flange; 5. Mechanism box; 6. Rubber air bladder; 7. Air guide hose; 8. Drive motor; 9. First drive gear; 10. Second drive gear; 11. Third drive gear; 12. Rotating shaft; 13. Adjusting box; 14. Piston plate; 15. Threaded column; 16. Sealing rubber ring; 17. Bearing plate; 18. Ball bearing; 19. Annular groove; 20. Mounting plate; 21. Mounting hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0028] Embodiments of this utility model:

[0029] As shown in Figures 1-8, this utility model provides a rectangular ventilation butterfly valve, including a valve body 1, a rubber air bladder 6, a drive mechanism, and an air bladder adjustment mechanism. A valve plate 2 is provided inside the valve body 1, and a hollow shaft 3 is connected to the center of the valve plate 2. A sealed bearing adapted to the hollow shaft 3 is provided on the valve body 1. A U-shaped baffle 4 is provided on the inner wall of the valve body 1, and a mechanism box 5 is provided on the side of the valve body 1. Mounting plates 20 are symmetrically arranged on the surface of the valve body 1, and mounting holes 21 are opened on the mounting plates 20. This arrangement facilitates connection with external ventilation ducts.

[0030] As shown in Figures 1-8, the rubber airbag 6 is located at the edge of the side of the valve plate 2. The rubber airbag 6 is U-shaped, corresponding to the U-shaped retaining edge 4. The drive mechanism is located on the mechanism box 5. The drive mechanism includes a drive motor 8, a first drive gear 9, a second drive gear 10, and a third drive gear 11. The drive motor 8 is located on the side of the mechanism box 5. The first drive gear 9, the second drive gear 10, and the third drive gear 11 are all located inside the mechanism box 5. The second drive gear 10 is sleeved on the surface of the hollow shaft 3. The first drive gear 9 and the third drive gear 11 are both meshed with the second drive gear 10. A rotating shaft 12 is located at the center and is connected to a drive motor 8. A support plate 17 is provided inside the mechanism box 5. The support plate 17 has an adaptation groove that matches the third drive gear 11. Multiple evenly distributed balls 18 are provided on the inner wall of the adaptation groove. An annular groove 19 that matches the balls 18 is provided on the third drive gear 11. The balls 18 and the annular groove 19 can limit the third drive gear 11. The drive motor 8 drives the first drive gear 9 and the rotating shaft 12 to rotate. Under the meshing transmission of the first drive gear 9 and the second drive gear 10, the hollow shaft 3 and the valve plate 2 rotate to close.

[0031] The airbag adjustment mechanism is located inside the mechanism box 5. An air guide hose 7 is provided between the airbag adjustment mechanism and the rubber airbag 6. The airbag adjustment mechanism includes an adjustment box 13, inside which is a piston plate 14. A threaded post 15 is connected to the side of the piston plate 14, and a sealing rubber ring 16 is provided on the piston plate 14. A threaded hole for threaded connection with the threaded post 15 is opened at the center of the third drive gear 11. The adjustment box 13 is connected to the air guide hose 7. The adjustment box 13 is rectangular in structure. This design restricts the piston plate 14 and the threaded post 15, preventing rotation. A cavity connected to the hollow shaft 3 is opened inside the valve body 1. The cavity is adapted to the air guide hose 7, allowing for closure when the hollow shaft 3 and valve plate 2 rotate. Simultaneously, through the meshing transmission of the second drive gear 10 and the third drive gear 11, the third drive gear 11 rotates, and under the threaded engagement, the threaded column 15 pushes the piston plate 14 to move, introducing the air in the regulating box 13 into the rubber airbag 6 through the air guide hose 7, thereby causing the rubber airbag 6 to inflate. The airbag will press and adhere to the U-shaped flange 4, automatically filling the gap. When the hollow shaft 3 and the valve plate 2 rotate to open, the third drive gear 11 will rotate in the opposite direction, and under the threaded engagement, the threaded column 15 will pull the piston plate 14 to move back to its original position, drawing the air in the rubber airbag 6 back into the regulating box 13 through the air guide hose 7. The rubber airbag 6 is compressed, its volume decreases, and it is easier for airflow to pass through.

Claims

1. A rectangular ventilation butterfly valve, characterized in that, include: A valve body (1) is provided inside the valve body (1), and a hollow shaft (3) is connected to the center of the valve plate (2). A U-shaped baffle (4) is provided on the inner wall of the valve body (1), and a mechanism box (5) is provided on the side of the valve body (1). A rubber airbag (6) is provided at the edge of the side of the valve plate (2). A drive mechanism is provided on the mechanism box (5). An airbag adjustment mechanism is provided inside the mechanism box (5), and a flexible air guide hose (7) is provided between the airbag adjustment mechanism and the rubber airbag (6).

2. A rectangular ventilation butterfly valve according to claim 1, characterized in that: The driving mechanism includes a drive motor (8), a first drive gear (9), a second drive gear (10), and a third drive gear (11). The drive motor (8) is located on the side of the mechanism box (5). The first drive gear (9), the second drive gear (10), and the third drive gear (11) are all located inside the mechanism box (5). The second drive gear (10) is sleeved on the surface of the hollow shaft (3). The first drive gear (9) and the third drive gear (11) are both meshed with the second drive gear (10). A rotating shaft (12) is located at the center of the first drive gear (9). The rotating shaft (12) is connected to the drive motor (8).

3. A rectangular ventilation butterfly valve according to claim 2, characterized in that: The airbag adjustment mechanism includes an adjustment box (13), a piston plate (14) is provided inside the adjustment box (13), a threaded column (15) is connected to the side of the piston plate (14), and a threaded hole is provided at the center of the third drive gear (11) for threaded connection with the threaded column (15). The adjustment box (13) is connected to the air guide hose (7).

4. A rectangular ventilation butterfly valve according to claim 3, characterized in that: A sealing rubber ring (16) is provided on the piston plate (14).

5. A rectangular ventilation butterfly valve according to claim 2, characterized in that: The mechanism box (5) is provided with a support plate (17), and the support plate (17) is provided with an adaptation groove that is compatible with the third drive gear (11). The inner wall of the adaptation groove is provided with a plurality of evenly distributed balls (18), and the third drive gear (11) is provided with an annular groove (19) that is compatible with the balls (18).

6. A rectangular ventilation butterfly valve according to claim 1, characterized in that: The valve body (1) has a cavity that communicates with the hollow shaft (3), and the cavity is adapted to the air guide hose (7).

7. A rectangular ventilation butterfly valve according to claim 1, characterized in that: The valve body (1) is symmetrically provided with mounting plates (20), and mounting holes (21) are provided on the mounting plates (20).

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