Self-cleaning air valve

Abstract

The invention discloses a self-cleaning air valve which comprises an air pipe, a valve plate single body rotationally installed in the air pipe, a valve plate rotating assembly arranged on the outer wall of one side of the air pipe and driving the valve plate single body to rotate and an outer wrapping shell installed on the peripheral face of the air pipe. The corner detection assembly is installed on the outer wall of the other side of the air pipe and used for detecting the rotation angle of the valve plate single body; and the double-sided linear scraping assemblies are arranged at the two axial ends of the air pipe in the mode that every two double-sided linear scraping assemblies are arranged in pairs and are in mirror symmetry. The two-way traction assembly is used for driving the two double-face linear scraping assemblies in the axial direction of the air pipe to be close to each other oppositely till the double-face linear scraping assemblies make contact with the upper face and the lower face of one side of the valve plate single body, and then the dust discharging air flue at the bottom end of the air pipe is connected to an external dust collector; dirt on the upper surface and the lower surface of the valve plate single body is scraped off and sucked out by the dust discharging air channel and the dust collector, and later-period timed cleaning and maintaining of the air valve are conducted.

Description

Technical Field

[0001] This invention relates to the field of air valve technology, specifically a self-cleaning air valve. Background Technology

[0002] Air dampers are core components in ventilation, air conditioning, and smoke exhaust systems that control airflow. Their structure typically includes a valve body frame as the skeleton, parallel blades as movable adjustment parts, a shaft and bearing system supporting the flexible rotation of the blades, a linkage mechanism enabling synchronous linkage of multiple blades, edge seals ensuring airtightness, and an actuator that receives electrical signals and drives the valve plates in automatic control. Specifically, when the blades rotate to be parallel to the airflow direction, the air damper is fully open, maximizing the flow area and minimizing resistance. When the blades rotate at a certain angle to form an angle with the airflow, the flow cross-section decreases, and local resistance increases, thus precisely reducing the airflow. When the blades rotate to be completely perpendicular or closed, they can block the airflow to the maximum extent. As disclosed in the patent announcement CN216204226U, a damper includes a drive component, a valve frame, a limiting component, and blades. The drive component is fixed to the outside of the valve frame, and the blades are rotatably connected to the inside of the valve frame. The blades are driven to rotate by the drive component. The inner wall of the valve frame is provided with a limiting component to limit the rotation angle of the blades, so that the maximum rotation angle of the blades is 90°. When the blades rotate to their maximum rotation angle, the blades are parallel to the air inlet and outlet directions of the damper. It can be seen that the above technical solution is roughly the same as the air control principle of existing dampers, that is, controlling, regulating, cutting off, or guiding the flow of air in the pipeline, while the air transported by the ventilation system... Since air valves contain suspended particulate matter such as dust and pollen, when the valve is in a half-open state to adjust the air volume, air turbulence or low-speed zones are easily generated behind it. Some particles will impact and adhere to the surface of the valve due to inertia. Especially in high-humidity environments or in ducts that transport humid air, water vapor may condense on the valve and mix with dust to form mud-like dirt. Since air valves are usually installed inside the duct system, the space is small and the line of sight is limited. Most of the accumulated dirt is concentrated on the back of the blades. Thorough cleaning often requires disassembling the entire air valve from the duct, which involves a lot of work such as system shutdown and removal of surrounding ducts. It is time-consuming, labor-intensive and costly. Summary of the Invention

[0003] The purpose of this invention is to provide a self-cleaning air valve. The valve plate rotor assembly rotates the individual blade plane of the valve plate to be parallel to the airflow direction, and the angle is detected by the angle detection assembly. Then, the bidirectional traction assembly drives two double-sided linear scraping assemblies in the axial direction of the air duct to approach each other until the double-sided linear scraping assemblies contact the upper and lower surfaces of one side of the valve plate. Then, the dust exhaust duct at the bottom of the air duct is connected to an external vacuum cleaner. When the double-sided linear scraping assembly works, it scrapes off the dirt on the upper and lower surfaces of the valve plate and sucks it out by the dust exhaust duct and the vacuum cleaner, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning air valve, comprising an air duct, a valve plate unit rotatably installed inside the air duct, a valve plate rotating assembly disposed on one side of the outer wall of the air duct and driving the valve plate unit to rotate, and an outer casing installed on the outer circumferential surface of the air duct. Angle detection assembly, which is installed on the outer wall of the other side of the duct and is used to detect the rotation angle of the valve plate unit; The double-sided linear scraping assembly is arranged in pairs and mirror symmetrically at both ends of the duct. The top of the duct is equipped with a bidirectional traction assembly for driving the two double-sided linear scraping assemblies to move towards each other in the axial direction. The left and right outer walls of the duct are provided with straight slots for the double-sided linear scraping assemblies to move axially. The outer walls of the duct above and below the straight slots are equipped with guide rails for guiding the double-sided linear scraping assemblies to slide axially. Dust exhaust duct: The dust exhaust duct is located at the bottom of the air duct and is used to connect to an external vacuum cleaner.

[0005] Preferably, the bidirectional traction assembly includes an H-shaped beam fixed axially between the opposite outer walls of the two flanges of the duct, a bidirectional lead screw rotatably mounted inside the H-shaped beam, and slides symmetrically slidably mounted on both sides of the bottom end of the H-shaped beam. A nut pair is fixed at the top of the slide, and the nut pair and the bidirectional lead screw are threaded together. Arc-shaped connecting arms are fixed on the left and right outer walls of the slide, and the arc-shaped connecting arms are used to connect with the double-sided linear scraping assembly. A servo motor is installed at the top of the outer shell, and a synchronous belt drive structure for driving the bidirectional lead screw to rotate is installed on the output shaft of the servo motor.

[0006] Preferably, the double-sided linear scraping assembly includes a sliding plate, a platform, a guide rod, a first concave plate, a rocker arm structure, a self-resetting rotary structure, a wiping plate, and an eccentric drive structure. The sliding plate is slidably mounted on a guide rail. The platform is fixed to the outer wall of the sliding plate on the side away from the guide rail. The guide rod is concentrically slidably fitted inside the sliding plate and can move along the radial direction of the air duct. Two wiping plates are provided in the air duct and connected to one end of the guide rod. The two wiping plates are arranged in a mirror image symmetrically. The other end of the guide rod passes through to the outside of the platform and is fixedly connected to the first concave plate. The rocker arm structure is installed at the top of the platform, and one end of the rocker arm structure is slidably engaged with the first concave plate. The self-resetting rotary structure is located above the rocker arm structure. The eccentric drive structure is installed behind the rocker arm structure and cooperates with the self-resetting rotary structure to drive the rocker arm structure to reciprocate.

[0007] Preferably, the rocker arm structure includes a rotating shaft rotatably mounted inside the plate and rocker arm units fixed at both ends of the rotating shaft surface, with one end of the rocker arm unit located in the first concave plate.

[0008] Preferably, the self-resetting rocking structure includes a suspension platform fixed on the outer wall of the slide plate above the platform, a protruding column integrally formed on one side of the top of the suspension platform, a swing arm fixed to the top of the rotating shaft, and a torsion spring fitted on the rotating shaft. One end of the torsion spring is engaged with one end of the swing arm, and the other end of the torsion spring is connected to the protruding column.

[0009] Preferably, the eccentric drive structure includes a motor mounted at the bottom of the platform and a roller disposed on one side of the swing arm. The output axis of the motor extends upward through the outside of the suspension platform and is integrally formed with a folded plate. The roller is rotatably mounted on the top of the folded plate.

[0010] Preferably, a number of equally spaced longitudinal ribs are provided between the opposite surfaces of the two wiping plates along the width direction. The length extension direction of the longitudinal ribs is parallel to the axial direction of the air duct. An arc-shaped notch is provided at the end of the wiping plate near the valve plate unit.

[0011] Preferably, a guide structure is also installed on one side of the outer wall of the slide plate. The guide structure includes a guide cylinder that is vertically fixed on one side of the outer wall of the slide plate, a slide column that is slidably installed inside the guide cylinder, and two second concave platforms that are fixed symmetrically at the ends of the slide columns. The second concave platforms are slidably engaged with the other end of the rocker arm unit.

[0012] Preferably, the valve plate rotation assembly includes a machine base mounted on one side of the outer wall of the duct, a geared motor mounted on the outer wall of the machine base, and rotating shafts mounted on the left and right inner walls of the duct. The valve plate unit is fixed between the two rotating shafts. The output shaft of the geared motor is fixedly connected to one end of one of the rotating shafts. Sealing rings are installed on both the left and right outer walls of the valve plate unit. A hollow shaft housing one concentric with the output shaft of the geared motor is fixed on the outer wall of the duct on one side of the machine base. The angle detection assembly includes a hollow shaft housing two fixed on the other side of the outer wall of the duct, a four-column end seat fixedly connected to one side of the outer wall of the hollow shaft housing two, and an encoder mounted on the outer wall of the four-column end seat. One end of the other rotating shaft passes through the outside of the hollow shaft housing two and the four-column end seat and is connected to the encoder.

[0013] Preferably, the dust exhaust duct includes two feet located below the duct, a U-shaped tube welded together at the top of the two feet, and a protruding tube installed on one side of the outer wall of the U-shaped tube. The open end of the protruding tube is bolted with a plug, the upper end of the U-shaped tube is fixedly connected to the duct, and the bottom end of the duct at the fixed connection point is provided with a through hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The self-cleaning air valve is equipped with a structure that includes a corner detection component, a double-sided linear scraping component, a bidirectional traction component, a dust exhaust duct, and an outer shell, which work together. The valve plate rotating component rotates the individual blades of the valve plate to be parallel to the airflow direction, and the corner detection component detects the angle. Then, the bidirectional traction component drives the two double-sided linear scraping components in the axial direction of the duct to approach each other until the double-sided linear scraping components contact the upper and lower surfaces of one side of the valve plate. After that, the dust exhaust duct at the bottom of the duct is connected to an external vacuum cleaner. When the double-sided linear scraping component works, it scrapes off the dirt on the upper and lower surfaces of the valve plate and sucks it out by the dust exhaust duct and the vacuum cleaner. This allows for the regular cleaning and maintenance of the air valve. The complex disassembly and cleaning work that originally required several hours and was completed by professionals is transformed into a standardized operation that can be automatically executed, which greatly saves maintenance time, labor costs, and interference with the operation of the ventilation system. Traditional air valve maintenance requires disassembling the air duct and manually cleaning each densely packed blade, which is not only time-consuming and labor-intensive, but also difficult to guarantee the cleaning effect and is prone to causing secondary pollution in the duct. However, by integrating the cleaning part of the double-sided linear scraping component into the air valve body, when cleaning is needed, the bidirectional traction component drives the double-sided linear scraping components at both ends to precisely approach and press against the upper and lower surfaces of the blades. This eliminates the need to disassemble the air valve or even interrupt the system operation on a large scale. The close contact scraping between the double-sided linear scraping component and the surface of the valve plate effectively removes stubborn dirt that is difficult to handle by traditional wiping methods, such as hardened or sticky dirt. The entire cleaning process is carried out simultaneously with the external vacuum cleaner. The dirt scraped off is captured by the directional airflow generated in real time and directly discharged outside the air duct, forming a complete process of scraping, collecting, and removing. This eliminates the risk of dirt that is dusted or wiped off and scattered throughout the air duct in traditional cleaning methods, eventually settling in other parts of the downstream air duct and causing secondary pollution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 yes Figure 1 A three-dimensional structural cross-sectional view of point AA; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention in the state where the outer shell and the duct are separated. Figure 1 ; Figure 6 This is a schematic diagram of the three-dimensional structure of the present invention in the state where the outer shell and the duct are separated. Figure 2; Figure 7 This is a three-dimensional structural diagram of the air duct and bidirectional traction assembly of the present invention in a coordinated state. Figure 8 This is a three-dimensional structural diagram of the bidirectional traction component of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the double-sided linear scraping assembly of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the three-dimensional structure of the double-sided linear scraping assembly of the present invention. Figure 2 ; Figure 11 This is a three-dimensional cross-sectional view of the double-sided linear scraping assembly of the present invention; Figure 12 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 13 This is a three-dimensional structural diagram of the machine tool and the outer shell of the present invention in a mating state; Figure 14 This is a three-dimensional structural diagram of the corner detection component of the present invention.

[0016] The attached diagram lists the components represented by each number as follows: 1. Air duct; 101. Straight groove; 2. Outer casing; 3. Valve plate rotating assembly; 31. Machine base; 32. Gear motor; 33. Hollow shaft housing; 34. Valve plate unit; 35. Rotating shaft; 36. Sealing ring; 4. Double-sided linear scraping assembly; 41. Sliding plate; 42. Plate platform; 43. Guide rod; 44. First concave platform; 45. Rocker arm structure; 451. Rotating shaft; 452. Rocker arm unit; 46. Guide structure; 461. Guide cylinder; 462. Sliding column; 463. Second concave platform; 47. Self-resetting rotary structure; 471. Suspension platform; 472. Swing arm; 473. Torsion spring 474. Protruding column; 48. Wiping plate; 481. Longitudinal rib; 482. Arc-shaped notch; 49. Eccentric drive structure; 491. Motor; 492. Folding plate; 493. Roller; 5. Dust exhaust duct; 51. Plate foot; 52. U-shaped tube; 53. Protruding tube; 54. Plug; 6. Bidirectional traction assembly; 61. H-shaped crossbeam; 62. Bidirectional lead screw; 63. Servo motor; 64. Synchronous belt drive structure; 65. Slide table; 66. Nut pair; 67. Arc-shaped connecting arm; 7. Guide rail; 8. Angle detection assembly; 81. Hollow shaft housing II; 82. Four-column end seat; 83. Encoder. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0020] Example 1, by Figures 1 to 6 The present invention includes a duct 1, a valve plate unit 34 rotatably installed inside the duct 1, a valve plate rotating assembly 3 disposed on one side of the outer wall of the duct 1 and driving the valve plate unit 34 to rotate, and an outer casing 2 installed on the outer peripheral surface of the duct 1. Angle detection component 8 is installed on the outer wall of the other side of the air duct 1 and is used to detect the rotation angle of the valve plate unit 34. The double-sided linear scraping assembly 4 is arranged in pairs and mirror symmetrically at both ends of the duct 1. The top of the duct 1 is provided with a bidirectional traction assembly 6 for driving the two double-sided linear scraping assemblies 4 to move towards each other in the axial direction. The left and right outer walls of the duct 1 are provided with straight grooves 101 for the double-sided linear scraping assemblies 4 to move axially. The outer walls of the duct 1 at the upper and lower positions of the straight grooves 101 are provided with guide rails 7 for guiding the double-sided linear scraping assemblies 4 to slide axially. Dust exhaust duct 5 is located at the bottom of the duct 1 and is used to connect to an external vacuum cleaner; A control panel needs to be installed on the outer wall of the outer casing 2. The control panel serves as a control unit and integrates an embedded keypad, a wireless communication module interface, or a simple start / stop button to facilitate the operation of the various components in the air valve by the staff. The outer casing 2 tightly encloses all internal moving parts, such as the guide rail 7, the bidirectional traction assembly 6, and the double-sided linear scraping assembly 4, to create a relatively closed and isolated cleaning environment and reduce the leakage of tiny particles or odors that may be generated during the cleaning process into the equipment room or ceiling.

[0021] Example 2, based on Example 1, is... Figure 7 and Figure 8 The bidirectional traction assembly 6 includes an H-shaped beam 61 fixed axially between the opposite outer walls of the two flanges of the duct 1, a bidirectional lead screw 62 rotatably mounted inside the H-shaped beam 61 via roller bearings, and slides 65 symmetrically slidably mounted on both sides of the bottom end of the H-shaped beam 61. A nut pair 66 is fixed to the top of the slide 65, and the nut pair 66 and the bidirectional lead screw 62 are threaded together. Arc-shaped connecting arms 67 are fixed to the left and right outer walls of the slide 65, and are used to connect with the double-sided linear scraping assembly 4. A servo motor 63 is mounted on the top of the outer casing 2, and the output shaft of the servo motor 63 is equipped with a drive mechanism. The synchronous belt drive structure 64 for rotating the bidirectional lead screw 62, when controlling the two double-sided linear scraping components 4 to move towards each other in the axial direction using the bidirectional traction component 6, drives the bidirectional lead screw 62 to rotate through the synchronous belt drive structure 64. Then, the bidirectional lead screw 62 drives the slide table 65 to move along the axial direction through the nut pair 66. That is, the two slide tables 65 and the arc-shaped connecting arm 67 move towards each other. During this process, the guide rail 7 provides a high rigidity and high straightness guiding reference to ensure that the arc-shaped connecting arm 67 drives the double-sided linear scraping component 4 to maintain a stable trajectory during the movement, without deviation or vibration.

[0022] Example 3, based on Example 2, by Figure 9 , Figure 10 , Figure 11 and Figure 12The double-sided linear scraping assembly 4 includes a sliding plate 41, a plate 42, a guide rod 43, a first concave plate 44, a rocker arm structure 45, a self-resetting rotary structure 47, a wiping plate 48, and an eccentric drive structure 49. The sliding plate 41 is slidably mounted on the guide rail 7. The plate 42 is fixed to the outer wall of the sliding plate 41 on the side away from the guide rail 7. The guide rod 43 is concentrically slidably fitted inside the sliding plate 41 and can move along the radial direction of the air duct 1. Two wiping plates 48 are provided in the air duct 1 and are connected to the guide rod 45. One end of the guide rod 43 is connected, and the two wiping plates 48 are arranged in a mirror symmetrical manner. The other end of the guide rod 43 extends through to the outside of the plate 42 and is fixedly connected to the first concave plate 44. The rocker arm structure 45 is installed on the top of the plate 42, and one end of the rocker arm structure 45 is slidably engaged with the first concave plate 44. The self-resetting rotating structure 47 is set above the rocker arm structure 45. The eccentric drive structure 49 is installed behind the rocker arm structure 45 and cooperates with the self-resetting rotating structure 47 to drive the rocker arm structure 45 to reciprocate. After the bidirectional traction component 6 drives the double-sided linear scraping component 4 into position, the two scraping plates 48 at the end of the guide rod 43 contact the upper and lower surfaces of the valve plate unit 34. The rotational motion of the eccentric drive structure 49 is converted into the reciprocating swing of the self-resetting rocking structure 47. At this time, the rocker arm structure 45 moves together with the self-resetting rocking structure 47. The rocker arm structure 45 drives the first concave platform 44, the guide rod 43, and the scraping plates 48 to move reciprocally along the radial direction of the air duct 1. The guide rod 43 ensures that the movement trajectory remains straight when subjected to the scraping reaction force, without deviation or jamming. The scraping plates 48 and the surface of the valve plate unit 34 slide relative to each other, and the adhering dirt is physically scraped off and sucked out by the vacuum cleaner connected to the double-sided linear scraping component 4. The rocker arm structure 45 includes a rotating shaft 451 rotatably installed inside the plate 42 and rocker arm units 452 fixed at both ends of the surface of the rotating shaft 451. One end of the rocker arm unit 452 is located in the first concave plate 44. The self-resetting rocker structure 47 includes a suspension platform 471 fixed on the outer wall of the slide plate 41 above the plate 42, a protrusion 474 integrally formed on one side of the top of the suspension platform 471, a swing arm 472 fixed to the top of the rotating shaft 451, and a torsion spring 473 fitted on the rotating shaft 451. One end of the torsion spring 473 is engaged with one end of the swing arm 472, and the other end of the torsion spring 473 is connected to the protrusion 474. The eccentric drive structure 49 includes a motor 491 installed at the bottom of the platform 42 and a roller 493 disposed on one side of the swing arm 472. The output axis of the motor 491 extends upward through the outside of the suspension platform 471 and is integrally formed with a folded plate 492. The roller 493 is rotatably installed on the top of the folded plate 492. The output shaft of motor 491 drives the folding plate 492 and roller 493 to revolve around the axis. The roller 493 continuously contacts the swing arm 472. When the swing arm 472 deflects outward under the drive of the roller 493, it will overcome the elastic force of the torsion spring 473 and force the entire structure to produce a swaying motion. When the roller 493 gradually separates from the swing arm 472, the torsion spring 473 will cause the swing arm 472 and the dust exhaust duct 5 to rotate back to their original positions. When the eccentric drive structure 49 and the self-resetting rocking structure 47 are engaged, since the rocker arm 472 is fixed at the upper end of the rotating shaft 451, the rocker arm 472 will force the rotating shaft 451 to rotate under the action of the eccentric drive structure 49. At this time, the rocker arm unit 452 at the upper and lower positions will follow the eccentric swing. Since one end of the rocker arm unit 452 is in sliding engagement with the first concave plate 44, this end of the rocker arm unit 452 will drive the guide rod 43 and the wiping plate 48 to slide radially. Between the opposing surfaces of the two wiping plates 48, several equally spaced longitudinal ribs 481 are provided along the width direction. The length extension direction of the longitudinal ribs 481 is parallel to the axial direction of the air duct 1. An arc-shaped notch 482 is provided at the end of the wiping plate 48 near the valve plate unit 34. The arc-shaped notch 482 is used to avoid the valve plate unit 34 after it is flipped over, reducing the space occupied by the wiping plate 48 in the air duct 1. Since the wiping plate 48 is always lying flat, it will not cause too much interference to the air volume control. The bottom edge of the longitudinal ribs 481 contacts the valve plate unit 34 and is used to scrape off stubborn stains. A guide structure 46 is also installed on one side of the outer wall of the slide plate 41. The guide structure 46 includes a guide cylinder 461 vertically fixed on one side of the outer wall of the slide plate 41, a slide column 462 slidably installed inside the guide cylinder 461, and two second concave platforms 463 fixed symmetrically at the ends of the slide column 462. The second concave platforms 463 are slidably engaged with the other end of the rocker arm unit 452. The other end of the rocker arm unit 452 is located in the second concave platform 463 of the slide column 462. At this time, the slide column 462 will slide back and forth in the guide cylinder 461 under the drive of the rocker arm unit 452. The guide structure 46 improves the swing stability of the rocker arm structure 45.

[0023] Example 4, based on Example 3, by Figure 13 and Figure 14 The valve plate rotating assembly 3 includes a machine base 31 mounted on the outer wall of one side of the air duct 1, a geared motor 32 mounted on the outer wall of the machine base 31, and rotating shafts 35 rotatably mounted on the left and right inner walls of the air duct 1. The valve plate unit 34 is fixed between the two rotating shafts 35. The output shaft of the geared motor 32 is fixedly connected to one end of one of the rotating shafts 35. Sealing rings 36 are installed at the left and right outer wall edges of the valve plate unit 34. A hollow shaft housing 33 concentric with the output shaft of the geared motor 32 is fixed on the outer wall of the air duct 1 on one side of the machine base 31. The output shaft of the geared motor 32 drives the rotating shafts 35 and the valve plate unit 34 to deflect, and the ventilation volume is controlled by the angle deflection of the valve plate unit 34. The corner detection component 8 includes a hollow shaft housing 2 81 fixed on the outer wall of the other side of the air duct 1, a four-column end seat 82 fixed on one side of the outer wall of the hollow shaft housing 2 81, and an encoder 83 installed on the outer wall of the four-column end seat 82. One end of another rotating shaft 35 passes through the outside of the hollow shaft housing 2 81 and the four-column end seat 82 and is connected to the encoder 83. The encoder 83 monitors and provides feedback on the rotation angle of the valve plate unit 34 in real time. Only when the air valve and control unit confirm that the valve plate unit 34 has reached the parallel position will they send execution commands to the subsequent bidirectional traction component 6 and double-sided linear scraping component 4 to avoid poor cleaning effect or mechanical interference risk due to the valve plate unit 34 not being in the correct angle. The dust exhaust duct 5 includes two feet 51 located below the duct 1, a U-shaped tube 52 welded together at the top of the two feet 51, and a protruding tube 53 installed on one side of the outer wall of the U-shaped tube 52. A plug 54 is bolted to the open end of the protruding tube 53. The upper end of the U-shaped tube 52 is fixed to the duct 1, and the bottom end of the duct 1 at the fixed point is provided with a through hole. The operator can remove the plug 54 from the protruding tube 53 and connect the open end of the protruding tube 53 to an external vacuum cleaner. At this time, the U-shaped tube 52 and the protruding tube 53 form a negative pressure channel below the cleaning area at the bottom of the duct 1. Its inlet is directly facing the scraping operation area to ensure that the dirt will not fly or settle in the duct 1 after being removed.

[0024] In this embodiment, the ventilation system where the duct 1 is located is first confirmed to be in a safe, suspended state to avoid airflow interference during cleaning. The vacuum cleaner hose is securely connected to the dust exhaust duct 5, ensuring an airtight connection. The vacuum cleaner itself, as the final collection container for dirt, must have the capacity and power to meet the cleaning cycle requirements. The operator starts the cleaning process through the control unit. The valve plate rotation assembly 3 receives the command and drives all valve plate units 34 to rotate. The angle detection assembly 8 monitors the rotation angle of the valve plate units 34 in real time, ensuring that the valve plate units 34 are precisely rotated to a preset cleaning position that is completely parallel to the airflow direction. This position exposes the maximum surface area of ​​the valve plate units 34 and provides geometric alignment for the subsequent scraping operation. The bidirectional traction assembly 6 drives the two sets of double-sided linear scraping assemblies 4 mounted on the guide rail 7 to move towards each other until the double-sided linear scraping assemblies 4 smoothly approach and finally press against the valve plate units 34. The component 4 performs a stable and uniform reciprocating scraping motion along the surface of the valve plate unit 34 in the radial direction. The scraping path covers the entire effective area of ​​the valve plate unit 34. Dry dust, damp dirt, or hardened material adhering to the upper and lower surfaces of the valve plate unit 34 are effectively peeled off from the metal surface by the double-sided linear scraping component 4. At the same time, the external vacuum cleaner continues to work, generating a stable negative pressure airflow at the inlet of the dust exhaust duct 5, instantly sucking in all the dirt particles that have just been scraped off, and directly transporting them to the dust collection bin of the vacuum cleaner through the pipe. After the self-cleaning is completed, the double-sided linear scraping component 4 is driven by the bidirectional traction component 6 to separate towards each other, returning to the initial parking position at both ends of the air duct 1, completely detaching from the normal airflow channel of the air valve. The valve plate rotation component 3 adjusts the blades to the required working angle according to the command. The operator disconnects the dust exhaust duct 5 from the vacuum cleaner and empties the dust collection bin of the vacuum cleaner, thus completing the physical waste disposal of the entire maintenance work.

[0025] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0026] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0027] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A self-cleaning air valve, comprising an air duct (1), a valve plate unit (34) rotatably mounted inside the air duct (1), a valve plate rotating assembly (3) disposed on one side of the outer wall of the air duct (1) and driving the valve plate unit (34) to rotate, and an outer casing (2) mounted on the outer circumferential surface of the air duct (1), characterized in that: Angle detection assembly (8) is installed on the outer wall of the other side of the air duct (1) and is used to detect the rotation angle of the valve plate unit (34); The double-sided linear scraping assembly (4) is arranged in pairs and mirror symmetrically at both ends of the duct (1). The top of the duct (1) is provided with a bidirectional traction assembly (6) for driving the two double-sided linear scraping assemblies (4) to move towards each other in the axial direction. The left and right outer walls of the duct (1) are provided with straight slots (101) for the double-sided linear scraping assembly (4) to move axially. The outer walls of the duct (1) at the upper and lower positions of the straight slots (101) are provided with guide rails (7) for guiding the double-sided linear scraping assembly (4) to slide axially. Dust exhaust duct (5) is located at the bottom of the air duct (1) and is used to connect to an external vacuum cleaner.

2. The self-cleaning air valve according to claim 1, characterized in that: The bidirectional traction assembly (6) includes an H-shaped beam (61) fixed axially between the outer walls of the two flanges of the duct (1), a bidirectional lead screw (62) rotatably mounted inside the H-shaped beam (61), and slides (65) symmetrically slidably mounted on both sides of the bottom end of the H-shaped beam (61). A nut pair (66) is fixed at the top of the slide (65), and the nut pair (66) and the bidirectional lead screw (62) are threaded together. Arc-shaped connecting arms (67) are fixed on the left and right outer walls of the slide (65). The arc-shaped connecting arms (67) are used to connect with the double-sided linear scraping assembly (4). A servo motor (63) is installed at the top of the outer shell (2). The output shaft of the servo motor (63) is equipped with a synchronous belt drive structure (64) for driving the bidirectional lead screw (62) to rotate.

3. A self-cleaning air valve according to claim 2, characterized in that: The double-sided linear scraping assembly (4) includes a slide plate (41), a plate (42), a guide rod (43), a first concave plate (44), a rocker arm structure (45), a self-resetting rotary structure (47), a wiping plate (48), and an eccentric drive structure (49). The slide plate (41) is slidably mounted on a guide rail (7). The plate (42) is fixed to the outer wall of the slide plate (41) away from the guide rail (7). The guide rod (43) is concentrically slidably fitted inside the slide plate (41) and can move along the radial direction of the air duct (1). Two wiping plates (48) are provided in the air duct (1). One end of the guide rod (43) is connected to the other end of the plate (42), and the two wiping plates (48) are set in a mirror symmetrical arrangement. The other end of the guide rod (43) extends through to the outside of the plate (42) and is fixedly connected to the first concave plate (44). The rocker arm structure (45) is installed at the top of the plate (42), and one end of the rocker arm structure (45) is slidably engaged with the first concave plate (44). The self-resetting rotary structure (47) is set above the rocker arm structure (45). The eccentric drive structure (49) is installed behind the rocker arm structure (45) and cooperates with the self-resetting rotary structure (47) to drive the rocker arm structure (45) to reciprocate.

4. A self-cleaning air valve according to claim 3, characterized in that: The rocker arm structure (45) includes a rotating shaft (451) rotatably mounted inside the plate (42) and a rocker arm unit (452) fixed at both ends of the surface of the rotating shaft (451), with one end of the rocker arm unit (452) located in the first concave plate (44).

5. A self-cleaning air valve according to claim 4, characterized in that: The self-resetting rocking structure (47) includes a suspension platform (471) fixed on the outer wall of the slide (41) above the platform (42), a protruding post (474) integrally formed on one side of the top of the suspension platform (471), a swing arm (472) fixed to the top of the rotating shaft (451), and a torsion spring (473) fitted on the rotating shaft (451). One end of the torsion spring (473) is engaged with one end of the swing arm (472), and the other end of the torsion spring (473) is connected to the protruding post (474).

6. A self-cleaning air valve according to claim 5, characterized in that: The eccentric drive structure (49) includes a motor (491) installed at the bottom of the platform (42) and a roller (493) set on one side of the swing arm (472). The output axis of the motor (491) extends upward through the outside of the suspension platform (471) and is integrally formed with a folded plate (492). The roller (493) is rotatably installed on the top of the folded plate (492).

7. A self-cleaning air valve according to claim 3, characterized in that: Between the two wiping plates (48), there are several equally spaced longitudinal ribs (481) along the width direction. The length extension direction of the longitudinal ribs (481) is parallel to the axial direction of the air duct (1). An arc-shaped notch (482) is provided at one end of the wiping plate (48) near the valve plate unit (34).

8. A self-cleaning air valve according to claim 4, characterized in that: A guide structure (46) is also installed on one side of the outer wall of the slide (41). The guide structure (46) includes a guide cylinder (461) vertically fixed on one side of the outer wall of the slide (41), a slide column (462) slidably installed inside the guide cylinder (461), and two second concave platforms (463) fixed at the ends of the slide column (462) in a mirror-symmetrical manner. The other end of the second concave platform (463) and the rocker arm unit (452) are slidably engaged.

9. A self-cleaning air valve according to claim 1, characterized in that: The valve plate rotating assembly (3) includes a machine base (31) mounted on the outer wall of one side of the air duct (1), a geared motor (32) mounted on the outer wall of the machine base (31), and rotating shafts (35) rotatably mounted on the left and right inner walls of the air duct (1). The valve plate unit (34) is fixed between the two rotating shafts (35). The output shaft of the geared motor (32) is fixedly connected to one end of one of the rotating shafts (35). Sealing rings (36) are installed on the left and right outer walls of the valve plate unit (34). The air duct (1) on one side of the machine base (31) A hollow shaft housing 1 (33) concentric with the output shaft of the geared motor (32) is fixed on the outer wall. The rotation angle detection assembly (8) includes a hollow shaft housing 2 (81) fixed on the outer wall of the other side of the air duct (1), a four-column end seat (82) fixed on one side of the outer wall of the hollow shaft housing 2 (81), and an encoder (83) installed on the outer wall of the four-column end seat (82). One end of another rotating shaft (35) passes through the outside of the hollow shaft housing 2 (81) and the four-column end seat (82) and is connected to the encoder (83).

10. A self-cleaning air valve according to claim 1, characterized in that: The dust exhaust duct (5) includes two feet (51) set below the duct (1), a U-shaped pipe (52) welded together at the top of the two feet (51), and a protruding pipe (53) installed on the outer wall of one side of the U-shaped pipe (52). A plug (54) is bolted to the open end of the protruding pipe (53). The upper end of the U-shaped pipe (52) is fixed to the duct (1), and a through hole is provided at the bottom end of the duct (1) where the connection is made.

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