Air classifier inner wall cleaning device

Abstract

A cleaning device for the inner wall of an air classifier includes an air classifier housing, a rotating device, a brushing device, and a lifting device. The inner wall of the air classifier housing has several vertically arranged V-shaped tracks, which are open to communicate with the outside. The rotating device includes a ring-shaped support frame, horizontally arranged, slidably connected to each V-shaped track via an elastic connecting device. The lifting device passes through the open sections of the V-shaped tracks and connects to the ring-shaped support frame to drive the ring-shaped support frame to move up and down along the V-shaped tracks. A stator assembly and a rotor assembly are also included. The stator assembly is concentrically mounted on the ring-shaped support frame, and the rotor assembly is concentrically mounted on the stator assembly. When the stator assembly is energized, it rotates. One end of the brushing device is fixed to the outer periphery of the rotor assembly, and the other end abuts against the inner wall of the air classifier housing. This invention can thoroughly clean fine particles remaining on the inner wall of the air classifier, improving discharge efficiency and reducing material loss.

Description

Technical Field

[0001] This invention relates to the field of air classifier technology, specifically to a cleaning device for the inner wall of an air classifier. Background Technology

[0002] Air classifiers are widely used in powder sorting in building materials, food, medical, metallurgy, chemical and other fields. The core component is a cage rotor composed of multiple blades. A negative pressure is created in the classifier chamber by a fan. Air enters the classifier through the air inlet and forms a rotating airflow under the drive of the high-speed cage rotor. Fine particles entering the classifier chamber from the feed inlet are dragged by the airflow force greater than the centrifugal force, so they pass through the rotor blades and move towards the center of the rotor. The suction force of the fan makes the fine particles fall into the fine powder collector. Coarse particles are subjected to greater centrifugal force and move towards the outer side wall. Under the action of gravity, they fall along the side wall into the coarse powder collector, thus realizing the separation of coarse and fine particles.

[0003] Currently, most high-efficiency air classifiers use rotary drums. After operation, some particulate dust usually remains on the inner wall of the rotary drum classifier. Since the fine powder content of the classifier is insufficient, we use an internal wall cleaning device to remove excess powder and improve the classification yield. Typically, the inner wall of the classifier is lined with wear-resistant ceramic plates. Traditionally, internal wall cleaning devices use the wear-resistant ceramic plates welded to the shell, and the particles adsorbed on the plates are knocked off by manual tapping. The problem is that during equipment operation, the harsh working conditions make manual cleaning impossible. Furthermore, when using large rotary drum classifiers, the large surface area of ​​the inner wall and the long-term wear of the ceramic lining plates cause dust particles to become embedded in the wall surface and even in the gaps between the ceramic plates. Manual tapping is ineffective in removing these particles, resulting in the fine powder content failing to meet the required level. Therefore, a new cleaning device is needed. Summary of the Invention

[0004] Technical problem solved: The present invention proposes an inner wall cleaning device for a classifier, which is used to sweep off the particles attached to the inner wall of a rotary classifier so that the amount of fine powder meets the specified requirements.

[0005] Technical solution:

[0006] The air classifier inner wall cleaning device includes an air classifier housing, a rotating device disposed inside the air classifier housing, a powder brushing device disposed on the rotating device, and an electric lifting device disposed outside the air classifier housing.

[0007] The inner wall of the air classifier housing is vertically provided with several V-shaped tracks, which are hollowed out for communication with the outside.

[0008] The rotating device includes:

[0009] A ring-shaped support frame is horizontally arranged, and several elastic connecting devices are fixedly arranged on its outer periphery. Each elastic connecting device is slidably connected to each V-shaped track. The electric lifting device passes through the hollow part of the V-shaped track and is connected to the ring-shaped support frame to drive the ring-shaped support frame to move up and down along the V-shaped track.

[0010] The stator assembly and the rotor assembly are provided. The stator assembly is concentrically mounted on the annular support frame. The rotor assembly is concentrically mounted on the stator assembly and mounted on the stator assembly. When the stator assembly is energized, the rotor assembly rotates.

[0011] One end of the powder brushing device is fixedly mounted on the outer periphery of the rotor assembly, and the other end abuts against the inner wall of the classifier housing.

[0012] Furthermore, the elastic connection device includes:

[0013] The slider has a groove on one side that is fitted onto the V-shaped track.

[0014] The slider connecting rod has one end that is slidably and telescopically mounted on the annular support frame along the diameter direction of the annular support frame, and the other end that is fixedly connected to the two ends on the other side of the slider.

[0015] The first spring has one end fixedly connected to the other side of the slider, and the other end fixed to the outer periphery of the annular support frame.

[0016] Furthermore, the stator assembly includes:

[0017] The stator housing is concentrically mounted on the annular support frame;

[0018] A controller, located inside the stator housing, is used to control the rotational speed of the rotor assembly;

[0019] The stator, mounted on the controller, generates a rotating magnetic field with the rotor assembly.

[0020] Furthermore, the rotor assembly includes:

[0021] A circular track is used to install the powder-brushing device;

[0022] The rotor is mounted on the circular track and runs synchronously with the circular track.

[0023] Furthermore, the powder brushing device includes:

[0024] The connecting assembly is circumferentially fixed on the circular track;

[0025] The drive rod is fixedly connected to the connecting assembly;

[0026] The connecting rod is hinged at one end to the driving rod;

[0027] A movable brush is movably connected to the other end of the connecting rod, and the movable brush abuts against the inner wall of the classifier housing;

[0028] The second spring is connected between the active rod and the connecting rod to ensure that the movable brush is always in contact with the inner wall of the classifier housing.

[0029] Furthermore, the electric lifting device includes:

[0030] The worm gear box has a pull rod on one side, one end of which passes through the V-shaped track cutout and is hinged to the annular support frame. The worm gear box has openings at the top and bottom.

[0031] The worm gear is rotatably mounted inside the worm gear box;

[0032] The worm is vertically arranged, with one end extending into the worm gear box and meshing with the worm gear.

[0033] A drive motor is connected to the bottom of the worm gear. Starting the drive motor causes the worm gear to move up and down, thereby driving the annular support frame to move up and down.

[0034] Beneficial effects:

[0035] (1) The present invention provides a cleaning device for the inner wall of an air classifier, comprising a cleaning device disposed inside the air classifier housing and an electric lifting device disposed outside the air classifier housing. The inner wall of the air classifier housing is vertically provided with several V-shaped tracks, each with a through hole in the center. The cleaning device includes an annular support frame, which is slidably connected to the V-shaped tracks via several elastic connecting devices. The annular support frame is connected to the electric lifting device. Furthermore, a stator assembly and a rotor assembly are mounted on the annular support frame. An elastic brush assembly is fixed on the rotor assembly, and the movable brush in the elastic brush assembly abuts against the inner wall of the air classifier housing. When the stator assembly is energized, the rotor assembly rotates relative to the stator assembly, thereby driving the elastic brush assembly to rotate and clean the inner wall of the air classifier housing horizontally. Additionally, activating the electric lifting device drives the annular support frame to move vertically along the V-shaped tracks, allowing the elastic brush assembly to clean the inner wall of the air classifier housing vertically. This achieves comprehensive cleaning of the inner wall of the air classifier housing, and is simple, convenient, and provides excellent cleaning results.

[0036] (2) The annular support frame of the present invention is designed with several elastic connection devices. Each elastic connection device includes a slider sleeved on a V-shaped track and a slider support frame for connecting the annular support frame and the slider. The slider support frame and the annular support frame are slidably connected. A first spring is also fixedly installed between the slider and the annular support frame. Through the arrangement of the slider, the slider support frame and the spring, the annular support frame can adapt to the inner wall of the classifier with different circumferential distances and ensure that the annular support frame can easily move up and down along the V-shaped track to achieve cleaning of the inner wall of the classifier in the vertical direction.

[0037] (3) The present invention is provided with a brushing device, including an active rod and a connecting rod that are hinged to each other, a second spring for the active rod and the connecting rod, and a movable brush that is movably connected to the end of the connecting rod; wherein the second spring is provided so that the movable brush is always in a state of contact with the inner wall of the classifier housing and has a certain reset function. In addition, the movable brush is movably connected to the end of the connecting rod, so that even on the irregular inner wall of the classifier, the movable brush can still be slowly tensioned by the spring and always in contact with the inner wall of the classifier when passing through the wall surface with different curvatures. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the internal wall cleaning device of the present invention;

[0039] Figure 2 This is an exploded schematic diagram of the inner wall cleaning device of the present invention;

[0040] Figure 3 This is a half-sectional view of the rotating device of the present invention;

[0041] Figure 4 This is a schematic diagram of the inner wall powder brushing device of the present invention;

[0042] Figure 5 This is a side view of the inner wall powdering device of the present invention;

[0043] Figure 6 This is a side view of the cleaning device of the present invention;

[0044] Figure 7 This is a partial enlarged view of the lifting device of the present invention;

[0045] Figure 8 This is a structural diagram of the stator and rotor positions of the present invention;

[0046] Figure 9 This is a structural diagram of the stator housing of the present invention;

[0047] Figure 10 This is a stator structure diagram of the present invention;

[0048] Figure 11 This is a structural diagram of the controller of the present invention;

[0049] Figure 12 This is a diagram of the circular track structure of the present invention;

[0050] Figure 13 This is a structural diagram of the circular flange and support frame of the present invention;

[0051] Figure 14 This is a schematic diagram of the slider and V-shaped track of the present invention;

[0052] Figure 15 This is a schematic diagram of the overall positional structure of the present invention;

[0053] Figure 16 This is a schematic diagram of the electric lifting device in this invention.

[0054] 1. Movable brush; 2. Connecting rod; 2-1. Second spring; 3. Active rod; 4. Spring connecting rod; 5. Connecting plate; 6. Connecting frame; 7. Connecting block; 8. Circular track; 8-1. First boss; 8-2. Second boss; 9. Controller; 9-1. Controller bracket; 10. Gasket; 11. Stator; 11-1. Conductor magnet; 11-2. Coil; 11-3. Conductor sleeve; 11-4. Stator cavity; 12. Rotor; 13. Stator housing; 13-1. Notch; 13-2. Stator housing boss; 14. Circular flange; 15. Annular support frame; 16. Slider connecting rod; 17. Spring support frame; 18. Slider; 19. Cylindrical pin; 20. Worm gear box; 21. Worm gear; 22. Worm; 23. Drive motor; 24. V-shaped track; 25. Air classifier housing. Detailed Implementation

[0055] The following embodiments are provided to enable those skilled in the art to more fully understand the present invention, but do not limit the invention in any way.

[0056] Reference Figure 1-4 An embodiment of the present invention provides a classifier inner wall cleaning device, including a classifier housing 25, a rotating device disposed inside the classifier housing 25, a brushing device disposed on the rotating device, and an electric lifting device disposed outside the classifier housing 25. The inner wall of the classifier housing is provided with a plurality of V-shaped tracks 24 vertically, and the V-shaped tracks 24 are hollowed out for communication with the outside.

[0057] The rotating device includes:

[0058] The annular support frame 15 is horizontally arranged, and several elastic connecting devices are fixedly arranged on its outer periphery. Each elastic connecting device is slidably connected to each V-shaped track 24. The electric lifting device passes through the hollow part of the V-shaped track 24 and is connected to the annular support frame 15 to drive the annular support frame 15 to move up and down along the V-shaped track 24.

[0059] The stator assembly and the rotor assembly are provided. The stator assembly is concentrically mounted on the annular support frame 15. The rotor assembly is concentrically mounted on the stator assembly and mounted on the stator assembly. When the stator assembly is energized, the rotor assembly rotates.

[0060] One end of the powder brushing device is fixedly mounted on the outer periphery of the rotor assembly, and the other end abuts against the inner wall of the classifier housing.

[0061] Preferably, two V-shaped tracks 24 are provided, symmetrically arranged on the inner wall of the air classifier. The inner wall of the air classifier where the V-shaped tracks 24 are located is also hollowed out to facilitate the electric lifting device to extend into the air classifier and connect with the annular support frame 15.

[0062] Correspondingly, two elastic connecting devices are preferably provided and symmetrically arranged on the outer periphery of the annular support frame 15. The annular support frame 15 is slidably connected to the V-shaped track 24 through the elastic connecting devices.

[0063] like Figure 6 As shown, the elastic connecting device includes a slider 18, a slider connecting rod 16, and a first spring, wherein a groove is provided on one side of the slider, as shown in the figure. Figure 14 As shown, the slider is fitted onto the V-shaped track 24 via a groove. The other side of the slider 18 is connected to a slider connecting rod 16 via a cylindrical pin 19. One end of the slider connecting rod 16 is slidably connected to the annular support frame 15 and can slide radially along the annular support frame 15. Several first springs are also provided between the slider 18 and the annular support frame 15, at least one of which is connected to the annular support frame 15 via a spring connecting rod 17. Through the arrangement of the first springs and the slider connecting rod 16, the annular support frame 15 can always be in a sliding connection state with the V-shaped track 24.

[0064] The stator assembly includes a stator housing 13, a controller 9, and a stator 11. The stator housing 13 is concentrically connected to an annular support frame 15 by screws. The controller is located inside the stator housing 13, and the stator 11 is connected below the controller 9.

[0065] The stator housing 13 is connected to the annular support frame 15. A circular boss is provided inside the stator housing 13, and the stator 11 is mounted on the circular boss. A controller 9 is inserted above the stator 11.

[0066] The rotor assembly includes a circular track 8 and a rotor 12. The rotor 12 is concentrically arranged with the stator 11 and is sleeved on the circular track 8. At the same time, the stator 11 is fixed to the inner wall of the circular track 8 by a shim 10.

[0067] like Figure 5As shown, the powder brushing device includes a connecting assembly, a drive rod 3, a connecting rod 2, a movable brush 1, and a second spring 2-1. The connecting assembly includes a connecting block 7, a connecting frame 6, and a connecting plate 5. The connecting block 7 is fixedly mounted on the circumference of the circular track 8. The connecting frame 6 is mounted on the connecting block 7, and the connecting plate 5 is fixed on the connecting frame 6. The drive rod 3 is mounted on the connecting plate 5. The drive rod 3 is hinged to the connecting rod 2. The movable brush 1 is mounted at the front end of the connecting rod 2. Two spring connecting rods 4 are respectively mounted on the drive rod 3 and the connecting rod 2. The second spring 2-1 is positioned between the two spring connecting rods. The second spring 2-1 ensures that the drive rod 3 and the connecting rod 2 are always under tension, ensuring that the movable brush 1 abuts against the irregular inner wall of the classifier. Multiple powder brushing devices can be installed and spaced apart on the circular track 8.

[0068] like Figure 15-16 As shown, V-shaped tracks 24 are respectively provided on both sides of the inner wall of the air classifier. The V-shaped tracks 24 are connected to the slider 18, thereby helping the equipment to move up and down on the air classifier wall. A worm gear 22 is provided on the outer side of the air classifier housing 25. A worm gear 22 base is provided at the bottom of the worm wheel 21. A drive motor 23 is provided on the worm gear 22 base. A worm wheel 21 is provided on the upper part of the worm gear 22. A worm wheel box 20 is provided outside the worm wheel 21, thereby providing drive for the lifting and lowering movement.

[0069] like Figure 7-13 As shown, the circular track 8 is connected to the connecting frame 6, and the annular support frame 15 is connected to the circular flange 14 by screws. The connecting block 7 is disposed on the circular flange 14 and is fixedly connected to the circular track 8.

[0070] The bottom of the stator housing 13 is connected to the annular support frame 15 by screws, while the top of the stator housing 13 is connected to the second protrusion 8-2 on the circular track 8 with a small gap. The bottom of the stator housing 13 is provided with two notches 13-1 to facilitate the displacement of the slider 18.

[0071] The stator 11 is equipped with a coil 11-2 and a magnetic conductor 11-1. The magnetic conductor 11-1 consists of an outer annular magnetic sleeve 11-3, 16 inner magnetic plates 11-5, and a connection between the magnetic sleeve 11-3 and the magnetic plates. The 16 inner magnetic plates are arranged in a ring at equal intervals, and a coil 11-2 is connected to the center of each magnetic plate. The coil 11-2 is wound around the magnetic plate. The stator 11 is positioned at the stator housing boss 13-2.

[0072] The controller 9 is inserted into the stator cavity 11-4. The controller bracket 9-1 is ring-shaped, with its shape conforming to the stator cavity 11-4 on the side closest to the stator 11. The controller bracket 9-1 mates with the stator cavity 11-4. The rotor 12 is fitted onto the first boss 8-1 of the circular track 8, enabling the circular track 8 and the rotor 12 to run synchronously.

[0073] There is a gap between the stator 11 and the rotor 12. The rotor 12 is mounted on the circular track 8, so that the circular track 8 and the rotor 12 run synchronously.

[0074] The spring connecting rod 4 is connected to the spring connecting rod 4 by a second spring 2-1. The annular support frame 15 cooperates with the slider 18, and the slider 18 moves up and down on the V-shaped track 24.

[0075] Working Principle: The air classifier inner wall cleaning device consists of three parts: an inner wall rotation device, an inner wall brushing device, and a lifting device. The inner wall brushing device, through a set of movable brushes 1, connecting rods 2, drive rods 3, circular tracks 8, second springs 2-1, spring ring support frames 4, and connecting blocks 7, allows fine particles remaining on the wall surface to be swept away by the movable brushes when material enters the air classifier for powder sorting, improving discharge efficiency and reducing material loss. By setting up the second spring 2-1, spring ring support frame 4, drive rods 3, and connecting rods 2, a spring return device is used when cleaning the wall surface because the inner wall of the air classifier is irregular. Considering the six freely moving brushes 1, a movable connection is used between the movable brushes 1 and the connecting rods 2, allowing the movable brushes 1 to rotate with three degrees of freedom. When passing over walls with different curvatures, the second spring 2-1 gradually tensions and remains in contact with the wall surface.

[0076] The V-shaped track 24 and the air classifier housing 25 where the V-shaped track 24 is located are respectively cut out. The cutouts are small and a small number of particles may get stuck in the cutouts, which is negligible.

[0077] The V-shaped track 24 is hollowed out from top to bottom, and the corresponding position of the air classifier housing 25 is also hollowed out to facilitate the connection of the ring support frame 15 with the external electric lifting device.

[0078] The air classifier's rotating device, driven by the rotating device, has a rotor 12 mounted on a circular track 8. A stator 11 is provided at the stator housing boss 13-2 of the air classifier. The stator 11 is connected to an external power source. When the stator 11 is energized, the rotor 12 and the stator 11 move to cut magnetic field lines, generating rotational force to achieve the rotational effect. As a driving device, the circular track 8 rotates, and the device moves up and down to clean the inner wall.

[0079] The classifier's lifting device, through the arrangement of a slider 18, a circumferential pin 19, a slider ring support frame 16, and a spring ring support frame 17, allows the slider 18 to move up and down on a V-shaped track, helping the cleaning device to clean the entire inner wall. Due to the different circumferential distances of the inner wall, a cylindrical pin 19 is connected to the slider 18. During the lifting movement, as the position of the slider 18 changes, the cylindrical pin 19 moves in a circular motion to prevent the equipment from locking up. At the same time, the slider ring support frame 16 and the spring ring support frame 17 extend and retract, allowing the slider 18 to operate at different circumferential distances.

Claims

1. A classifier inner wall cleaning device, comprising a classifier housing (25), a rotating device disposed within the classifier housing (25), a brushing device disposed on the rotating device, and an electric lifting device disposed outside the classifier housing (25), characterized in that, The inner wall of the air classifier housing (25) is vertically provided with several V-shaped tracks (24), which are hollowed out for communication with the outside. The rotating device includes: A ring support frame (15) is horizontally set, and a number of elastic connecting devices are fixedly set on its outer periphery. Each of the elastic connecting devices is slidably connected to each of the V-shaped rails (24). The electric lifting device passes through the hollow part of the V-shaped rail (24) and is connected to the ring support frame (15) to drive the ring support frame (15) to move up and down along the V-shaped rail (24). The stator assembly and the rotor assembly are provided. The stator assembly is concentrically mounted on the annular support frame (15). The rotor assembly is concentrically mounted on the stator assembly and mounted on the stator assembly. When the stator assembly is energized, the rotor assembly rotates. One end of the powder brushing device is fixedly disposed on the outer periphery of the rotor assembly, and the other end abuts against the inner wall of the classifier housing (25); The rotor assembly includes: A circular track (8) is used to install the powder brushing device; The rotor (12) is concentrically arranged with the stator (11), sleeved on the circular track (8), and runs synchronously with the circular track (8); The powder brushing device includes: The connecting component is circumferentially fixed on the circular track (8); The active rod (3) is fixedly connected to the connecting assembly; One end of the connecting rod (2) is hinged to the active rod (3); A movable brush (1) is movably connected to the other end of the connecting rod (2), and the movable brush (1) abuts against the inner wall of the classifier housing (25); The second spring is connected between the active rod (3) and the connecting rod (2) to ensure that the movable brush (1) and the inner wall of the classifier housing (25) are always in contact.

2. The air classifier inner wall cleaning device according to claim 1, characterized in that, The elastic connection device includes: The slider (18) has a groove on one side that is fitted onto the V-shaped track (24); The slider connecting rod (16) has one end slidingly and telescopically mounted on the annular support frame (15) along the diameter direction of the annular support frame (15), and the other end is fixedly connected to the two ends on the other side of the slider (18). The first spring has one end fixedly connected to the other side of the slider (18), and the other end fixed to the outer periphery of the annular support frame (15).

3. The air classifier inner wall cleaning device according to claim 1, characterized in that, The stator assembly includes: The stator housing (13) is concentrically mounted on the annular support frame (15); A controller (9) is disposed inside the stator housing (13) for controlling the rotational speed of the rotor assembly; The stator (11) is mounted on the controller (9) and generates a rotating magnetic field with the rotor assembly.

4. The air classifier inner wall cleaning device according to claim 3, characterized in that, The electric lifting device includes: The worm gear box (20) has a pull rod on one side. One end of the pull rod passes through the hollow part of the V-shaped track (24) and is hinged to the annular support frame (15). The top and bottom of the worm gear box (20) are open. The worm gear (21) is rotatably disposed within the worm gear box (20); The worm (22) is vertically arranged, with one end extending into the worm gear box (20) and meshing with the worm gear (21); The drive motor (23) is connected to the bottom of the worm (22). The drive motor (23) is started to make the worm (22) move up and down, thereby driving the annular support frame (15) to move up and down.

5. The air classifier inner wall cleaning device according to any one of claims 1 to 4, characterized in that, The bottom of the air classifier housing is a conical hopper.

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