Electric air valve

Abstract

The invention discloses an electric air valve which comprises a driving module, an annular sealing end cover, a blade disc, a clamping groove circular ring and a plurality of blade structures, the annular blade disc is concentrically and rotationally installed in the sealing end cover, the driving module is used for driving the blade disc to rotate, and the multiple blade structures are stacked up and down at the upper end of the blade disc at equal intervals. The blade structures are arranged in a ring shape around the circle center of the blade disc, each blade structure comprises an arc-shaped blade and a folded edge, a hinge hole is formed in one end of each arc-shaped blade, the folded edge is arranged at the other end of each arc-shaped blade, one end of any arc-shaped blade is rotationally installed on the blade disc through the hinge hole, and the other end of any arc-shaped blade is stacked on the middle section of the lower arc-shaped blade. A circle of clamping groove circular ring is arranged on the inner ring of the sealing end cover and located at the upper end of the blade structure, moving grooves are formed in the lower end of the clamping groove circular ring corresponding to the folded edges of the arc-shaped blades, and the folded edges can stretch into the inner ring or move away from the inner ring through the moving grooves. The center round hole of the sealing end cover is synchronously opened and closed through the blade structure, and the problem that the air valve adjusting precision is low is solved.

Description

Technical Field

[0001] This invention relates to the field of ventilation system technology, and specifically to an electric air valve. Background Technology

[0002] As a key control component of the ventilation system, the air valve dynamically adjusts its opening and closing state, such as by changing the blade angle driven by an electric actuator, to achieve precise distribution of regional air volume and switching of airflow direction, thereby meeting the high-efficiency ventilation needs of industrial production environments or building spaces.

[0003] While existing air valves have achieved basic control of air volume regulation, significant technical bottlenecks remain: their complex mechanical structure and reliance on traditional electric actuators result in insufficient regulation accuracy, making it difficult to meet the demand for precise air volume distribution; at the same time, the overall design has high redundancy, manifested in bulky valve bodies and large actuator sizes, leading to large installation space requirements, and the high manufacturing cost due to the excessive number of precision components, which restricts their application in high-efficiency ventilation systems.

[0004] Therefore, there is an urgent need for an electric air valve to solve the problem of low adjustment accuracy of traditional air valves. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing an electric air valve to solve the problem of low adjustment accuracy in traditional air valves.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An electric damper includes a drive module, an annular sealing end cover, a blade disk, a grooved ring, and several blade structures. An annular blade disk is concentrically mounted inside the annular sealing end cover. The drive module connects to and drives the blade disk to rotate. Several blade structures are stacked vertically and horizontally at equal intervals on the upper end of the blade disk, arranged in a ring around the center of the blade disk. Each blade structure includes an arc-shaped blade and a folded edge. One end of the arc-shaped blade has a hinge hole, and the other end has a vertical folded edge. One end of any arc-shaped blade is rotatably mounted on the blade disk through the hinge hole, while the other end is stacked on the middle section of the arc-shaped blade below. The inner ring of the annular sealing end cover, located above all the blade structures, is a grooved ring concentric with the blade disk. The lower end of the grooved ring has a moving groove corresponding to the folded edge of each arc-shaped blade, allowing the folded edge to move into or away from the inner ring of the sealing end cover.

[0007] To optimize the above technical solution, the specific measures also include: Furthermore, the blade structure also includes a first baffle and a second baffle. The first baffle is provided on the side of the arc-shaped blade with a folded edge and closer to the inner ring, and the second baffle is provided on the side of the arc-shaped blade with a folded edge and farther from the inner ring.

[0008] Furthermore, the end of the arc-shaped blade is rotatably mounted on the blade disk by means of a flat-head screw and a hinge hole.

[0009] Furthermore, the drive module includes a servo motor, a motor extension shaft, a gear, and a rack. The rack is provided on the outer edge of the side of the blade disk. The servo motor is installed on the outside of the sealing end cover. The output end of the servo motor is connected to the motor extension shaft. The motor extension shaft is rotatably inserted into the sealing end cover and connected to the gear. The gear meshes with the rack to drive the rack to rotate the blade disk.

[0010] Furthermore, the output end of the servo motor is connected to the motor extension shaft via a motor extension shaft fixing screw.

[0011] Furthermore, a bushing is fitted on the outer side of the motor extension shaft.

[0012] Furthermore, a motor bracket is installed on the outer side of the sealed end cap, and the servo motor is mounted on the motor bracket by motor bracket fixing screws.

[0013] Furthermore, it also includes reinforcing ribs and a central cone. The inner ring of the sealing end cap located below the blade disk is connected to the reinforcing ribs, and the central cone is connected to the center of the inner ring of the sealing end cap through the reinforcing ribs.

[0014] Furthermore, a sealing ring is provided inside the movable groove, and the folded seal is disposed within the sealing ring.

[0015] Furthermore, the sealing end cap is radially divided into an upper end cap structure and a lower end cap structure. The blade disk is rotatably mounted on the lower end cap structure, and the slotted ring is correspondingly fixed on the upper end cap structure. The upper end cap structure can be closed and connected to the lower end cap structure.

[0016] The beneficial effects of this invention are: This invention, through the design of a blade disk, a grooved ring, and several blades, allows for the connection of the sealing end cap's two ends axially relative to the blade disk to corresponding ventilation systems during use. A drive module rotates the blade disk, which functions as the sealing end cap, causing several arc-shaped blades to simultaneously extend into the inner ring under the constraints of the folded edge and the moving groove. This causes the sides of the arc-shaped blades near the inner ring to gradually extend from the lower end of the grooved ring and move towards the center of the blade disk, thus sealing the central hole of the inner ring of the annular sealing end cap. Conversely, by driving the blade disk to rotate in the opposite direction, the arc-shaped blades are simultaneously moved away from the inner ring under the constraints of the folded edge and the moving groove. This causes the sides of the arc-shaped blades near the inner ring to gradually retract from the lower end of the grooved ring and move away from the center of the blade disk, thus unfolding the central hole of the inner ring of the annular sealing end cap.

[0017] This invention utilizes a low-power servo motor as the control actuator, combined with a gear-rack transmission system, to achieve precise control of the opening and closing of the air valve, enabling accurate control based on actual airflow requirements. The entire unit features a modular design for easy assembly and disassembly, low rated power consumption, and can be powered by a battery in practical applications to achieve high-precision valve adjustment. It boasts high precision, high adjustment ratio, and good adjustment stability. The actuator is also more compact, requiring less installation space, and combines the advantages of high efficiency and mass production, making it suitable for automated ventilation control systems.

[0018] This invention employs a composite structure of a split sealing end cap and reinforcing ribs, which not only improves axial load-bearing capacity but is also lighter and easier to disassemble and maintain compared to traditional integral sealing end caps.

[0019] This invention utilizes a servo motor-driven gear-rack transmission multi-blade structure for synchronous control, ensuring high positioning accuracy and meeting the stringent airtightness requirements of ventilation systems.

[0020] The precision sliding pair design of the end flange-groove ring in the blade structure of this invention can ensure motion accuracy control and circumferential sealing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an electric air valve in a semi-open state, as proposed in this invention. Figure 2 This is a schematic diagram of the internal structure of an electric air valve in a semi-open state, as proposed in this invention. Figure 3 This is a schematic diagram of the blade structure of an electric air valve proposed in this invention; Figure 4 This is a front view of an electric air valve proposed in this invention. Figure 5This is a top view of an electric air valve in a half-open state as proposed in this invention. Figure 6 This is a bottom view of the partially open state of an electric air valve proposed in this invention. Figure 7 This is a schematic diagram of the initial state of the blade structure of an electric air valve proposed in this invention; Figure 8 This is a schematic diagram of the closed state of the blade structure of an electric air valve proposed in this invention.

[0022] Reference numerals: 1. Sealing end cap, 2. Motor bracket, 3. Motor bracket fixing screw, 4. Servo motor, 5. Motor extension shaft fixing screw, 6. Bushing, 7. Blade structure, 71. Hinge hole, 72. Folded edge, 73. First baffle, 74. Second baffle, 8. Reinforcing rib, 9. Central cone, 10. Motor extension shaft, 11. Gear, 12. Rack, 13. Slotted ring, 14. Blade disk, 15. Flat head screw. Detailed Implementation

[0023] The invention will now be described in further detail with reference to the accompanying drawings.

[0024] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 As shown, an electric air valve according to an embodiment of the present invention includes a drive module, an annular sealing end cover 1, a blade disk 14, a slotted ring 13, and several blade structures 7. The annular sealing end cover 1 has an annular blade disk 14 rotatably mounted concentrically inside. The drive module connects to and drives the blade disk 14 to rotate. Several blade structures 7 are stacked vertically and horizontally at equal intervals on the upper end of the blade disk 14, arranged in a ring around the center of the blade disk 14. Each blade structure 7 includes an arc-shaped blade and a folded edge 72. One end of the arc-shaped blade has a hinge hole 71, and the other end has a vertical folded edge 72. One end of any arc-shaped blade is rotatably mounted through the hinge hole 71. On the blade disk 14, the other end is stacked on the middle section of the arc-shaped blade below. The inner ring of the annular sealing end cap 1 and located at the upper end of all blade structures 7 is a groove ring 13 concentric with the blade disk 14. The side of the groove ring 13 closest to the center of the blade disk 14 is the inner ring. The lower end of the groove ring 13 is provided with a moving groove corresponding to the folded edge 72 of each arc-shaped blade. The moving groove allows the folded edge 72 to move into or away from the inner ring of the sealing end cap 1. The inner ring of the sealing end cap 1 and located at the lower end of the blade disk 14 is a sealing plate for sealing connection with the lower end of the blade disk 14. The blade structure 7 seals and expands between the lower end of the groove ring 13 and the upper end of the blade disk 14.

[0025] As attached Figure 7 and attached Figure 8 As shown, the present invention is configured with a blade disk 14, a slotted ring 13, and several blade structures 7. In use, the two ends of the sealing end cover 1 about the axial direction of the blade disk 14 can be connected to the corresponding ventilation systems. The blade disk 14, which is equivalent to the sealing end cover 1, is driven to rotate by the drive module. This causes several arc-shaped blades on it to move synchronously into the inner ring under the constraint of the folded edge 72 and the moving groove. As a result, the sides of the several arc-shaped blades near the inner ring gradually extend from the lower end of the slotted ring 13 and move towards the center of the blade disk 14, thereby closing the middle circular hole of the inner ring of the annular sealing end cover 1. By driving the blade disk 14 to rotate in the opposite direction, the several arc-shaped blades are driven to move synchronously away from the inner ring under the constraint of the folded edge 72 and the moving groove. This causes the sides of the several arc-shaped blades near the inner ring to gradually retract from the lower end of the slotted ring 13 and move away from the center of the blade disk 14, thereby unfolding the middle circular hole of the inner ring of the annular sealing end cover 1.

[0026] In this design, the inner ring of the sealing end cap 1 can be fitted with sleeves for docking with the ventilation system at both ends of the blade disk 14 axially.

[0027] In one specific embodiment based on the above, the blade structure 7 further includes a first baffle 73 and a second baffle 74. The first baffle 73 is provided on the side of the arc-shaped blade with the folded edge 72 and closer to the inner ring, while the second baffle 74 is provided on the side of the arc-shaped blade with the folded edge 72 and farther from the inner ring. Thus, the movement range of the arc-shaped blade can be limited by the first baffle 73 and the second baffle 74, preventing slippage and other issues.

[0028] In another specific embodiment based on the above, the end of the arc-shaped blade is rotatably mounted on the blade disk 14 via a flat-head screw 15 and a hinge hole 71. Thus, by using the flat-head screw 15, the vertical height of several stacked blade structures 7 can be reduced, thereby reducing the space occupied by the blade structure 7.

[0029] In another specific embodiment based on the above, the drive module includes a servo motor 4, a motor extension shaft 10, a gear 11, and a rack 12. The rack 12 is provided on the outer circumference of the side edge of the blade disk 14. The servo motor 4 is mounted on the outside of the sealing end cover 1. The output end of the servo motor 4 is connected to the motor extension shaft 10. The motor extension shaft 10 rotatably extends into the sealing end cover 1 and is connected to the gear 11. The gear 11 meshes with the rack 12 to drive the rack 12 to rotate the blade disk 14. Thus, in use, the servo motor 4 can drive the motor extension shaft 10 and the gear 11 to rotate, thereby driving the rack 12 to rotate the blade disk 14. In this solution, the rack 12 can be welded to the edge of the blade disk 14.

[0030] The output end of the aforementioned servo motor 4 is connected to the motor extension shaft 10 via the motor extension shaft fixing screw 5.

[0031] The motor extension shaft 10 is fitted with a bushing 6 on its outer side. This bushing 6 provides protection.

[0032] Among them, a motor bracket 2 is installed on the outer side of the aforementioned sealing end cap 1, and the servo motor 4 is installed on the motor bracket 2 by the motor bracket fixing screw 3.

[0033] As attached Figure 5 and attached Figure 6 As shown, in another specific embodiment based on the above, it also includes a reinforcing rib 8 and a central cone 9. The inner ring of the sealing end cover 1 located below the blade disk 14 is connected to the reinforcing rib 8, and the central cone 9 is connected to the center of the inner ring of the sealing end cover 1 through the reinforcing rib 8. In this way, the central cone 9, in conjunction with the arc-shaped blade, can achieve the closure of the central circular hole of the inner ring of the annular sealing end cover 1.

[0034] In another specific embodiment based on the above, a sealing ring is provided in the moving groove, and the folded edge 72 is sealed within the sealing ring. This increases the sealing effect and reduces friction during structural movement, thereby increasing the structural lifespan. Simultaneously, a rubber pad layer can be provided at the lower end of the slot ring 13, fitting against the upper ends of several arc-shaped blades, to further ensure the device's sealing performance and reduce friction between structures. A rubber pad layer can also be provided between the lower end of the arc-shaped blade and the blade disk 14. In this case, the rubber pad layers located at the upper and lower ends of the arc-shaped blade allow for the sealing expansion and contraction of the arc-shaped blade, and the blade disk 14 is sealed to the sealing end cap 1.

[0035] In another specific embodiment based on the above, the sealing end cap 1 is radially divided into an upper end cap structure and a lower end cap structure. The blade disk 14 is rotatably mounted on the lower end cap structure, and the slotted ring 13 is correspondingly fixed on the upper end cap structure. The upper end cap structure can be closed and connected to the lower end cap structure. In this solution, the upper end cap structure and the lower end cap structure can be designed as detachable structures, or they can be formed into an integral rigid shell by circumferential welding.

[0036] One specific embodiment of the present invention is as follows: The upper and lower end cap structures of the sealing end cap 1 are formed into an integral rigid shell by circumferential welding. The side wall is radially machined with mounting holes of Φ12±0.05mm, which are transitionally fitted with the motor extension shaft 10 using H7 / g6 to achieve quick centering and assembly. The inner ring is provided with 3×φ4mm radial reinforcing ribs 8, which are welded with the central cone 9 to form a triangular support system, which facilitates the closure of the central circular hole of the inner ring of the annular sealing end cap 1, and can simultaneously achieve axial support and dynamic sealing.

[0037] In use, the servo motor 4 drives the motor extension shaft 10 to rotate, which in turn drives the rack 12 to rotate the blade disk 14. Specifically, the motor bracket 2 is welded to the outside of the sealing end cover 1 on one side, and the other side is rigidly connected to the servo motor 4 via motor bracket fixing screws 3. The motor extension shaft 10 is welded to the gear 11, and the gear 11 and the rack 12, which is welded and fixed to the edge of the blade disk 14, form a meshing transmission pair. The bushing 6 provides radial protection. The motor bracket 2 adopts a split connection design; its connection to the sealing end cover 1 is achieved by welding, while its mating end with the servo motor 4 is detachably connected using motor extension shaft fixing screws 5.

[0038] Specifically, 12 stainless steel blades 7, each 0.5mm thick, can be evenly fixed to the blade disk 14 by flat-head screws 15. The 5mm folded edge 72 at the end of the arc-shaped blade forms a 0.2mm precision sliding pair with the groove ring 13 to ensure axial freedom and circumferential sealing.

[0039] The device of this invention uses a servo motor 4 with higher integration and control precision as the execution control mechanism. The motor, driver, reducer and other components are integrated into one unit, occupying very little installation space. The overall size of the device is only φ98×45mm. It has low power consumption, requiring only a 24V power supply, with a power of 50W and a torque of up to 20N.m.

[0040] The device of this invention employs a 12-blade evenly distributed structure 7 with a 5mm end folded edge 72, forming a sliding pair structure with the slotted ring 13, simultaneously achieving axial degree of freedom compensation and circumferential airtightness assurance. This mechanical linkage design ensures that the opening and closing angles of all blade structures 7 have a consistency deviation of ≤0.5°. Combined with the servo motor's 40.1° resolution control, it can achieve an airflow adjustment accuracy within ±3%. Compared with traditional products, the overall weight is reduced, the installation space requirement is lower, and the modular structure supports rapid on-site assembly. In this solution, the design of the blade structure 7 and the slotted ring 13 can be modeled using SolidWorks software, and the motion trajectory of the blade structure 7 can be analyzed to confirm the shape of the folded edge 72 and its relative position with the moving groove of the slotted ring 13. The motion trajectories at both ends of the blade structure 7 are: one end is a circular motion rotating around the flat-head screw 15, and the other end is a slight rotational motion of the folded edge 72 within the moving groove.

[0041] The sealing end cap 1 of the device of the present invention adopts a split upper end cap structure and a lower end cap structure, which facilitates quick disassembly and maintenance. The internal transmission system is integrated. The inner wall of the end cap is provided with three φ4mm stainless steel reinforcing ribs 8 symmetrically distributed at 120°. The reinforcing ribs 8 and the central cone 9 are welded to form a rigid triangular support frame. The central cone 9 can not only increase stability, but also achieve dynamic sealing with the blade structure 7.

[0042] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0043] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that those skilled in the art will understand that various changes, modifications, substitutions, refinements, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations should be considered within the scope of protection of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric air valve, characterized in that: The device includes a drive module, an annular sealing end cap (1), a blade disk (14), a slotted ring (13), and several blade structures (7). The annular sealing end cap (1) is concentrically mounted with an annular blade disk (14). The drive module is used to connect to and drive the blade disk (14) to rotate. Several blade structures (7) are stacked vertically and horizontally at equal intervals on the upper end of the blade disk (14). The several blade structures (7) are arranged in a ring around the center of the blade disk (14). The blade structure (7) includes an arc-shaped blade and a folded edge (72). One end of the arc-shaped blade is provided with a hinge hole (71). The other end of the arc-shaped blade is provided with a vertical folded edge (72). One end of any arc-shaped blade is rotatably mounted on the blade disk (14) through the hinge hole (71), and the other end is stacked on the middle section of the arc-shaped blade below. The inner ring of the annular sealing end cap (1) and the upper end of all blade structures (7) is provided with a groove ring (13) concentric with the blade disk (14). The lower end of the groove ring (13) is provided with a moving groove corresponding to the folded edge (72) of each arc-shaped blade. The moving groove allows the folded edge (72) to move into the inner ring of the sealing end cap (1) or away from the inner ring.

2. The electric air valve according to claim 1, characterized in that: The blade structure (7) further includes a first baffle (73) and a second baffle (74). The arc-shaped blade has a folded edge (72) on one side and a first baffle (73) on the side closer to the inner ring. The arc-shaped blade has a folded edge (72) on one side and a second baffle (74) on the side farther from the inner ring.

3. An electric air valve according to claim 1, characterized in that: The end of the arc-shaped blade is rotatably mounted on the blade disk (14) by means of a flat-head screw (15) and a hinge hole (71).

4. An electric air valve according to claim 1, characterized in that: The drive module includes a servo motor (4), a motor extension shaft (10), a gear (11), and a rack (12). The rack (12) is provided on the outer edge of the side of the blade disk (14). The servo motor (4) is installed on the outside of the sealing end cover (1). The output end of the servo motor (4) is connected to the motor extension shaft (10). The motor extension shaft (10) is rotatably inserted into the sealing end cover (1) and connected to the gear (11). The gear (11) meshes with the rack (12) to drive the rack (12) to rotate the blade disk (14).

5. An electric air valve according to claim 4, characterized in that: The output end of the servo motor (4) is connected to the motor extension shaft (10) via the motor extension shaft fixing screw (5).

6. An electric air valve according to claim 4, characterized in that: A bushing (6) is fitted on the outside of the motor extension shaft (10).

7. An electric air valve according to claim 4, characterized in that: A motor bracket (2) is installed on the outside of the sealing end cap (1), and the servo motor (4) is installed on the motor bracket (2) by the motor bracket fixing screw (3).

8. An electric air valve according to claim 1, characterized in that: It also includes a reinforcing rib (8) and a central cone (9). The inner ring of the sealing end cap (1) located below the blade disk (14) is connected to the reinforcing rib (8), and the central cone (9) is connected to the center of the inner ring of the sealing end cap (1) through the reinforcing rib (8).

9. An electric air valve according to claim 1, characterized in that: The movable groove is provided with a sealing ring, and the folded edge (72) is sealed in the sealing ring.

10. An electric air valve according to claim 1, characterized in that: The sealing end cap (1) is radially divided into an upper end cap structure and a lower end cap structure. The blade disk (14) is rotatably mounted on the lower end cap structure. The slotted ring (13) is correspondingly fixed on the upper end cap structure. The upper end cap structure can be closed and connected to the lower end cap structure.

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