Dust removal device

Abstract

The application relates to a dust removal device, which comprises a separator provided with a discharge port; a discharging bin provided with a discharging channel communicated with the discharge port; a stirrer arranged in the discharging bin, at least part of the stirrer being located in the discharging channel; a detector arranged on the discharging bin and used for detecting whether blockage occurs in the discharging channel; a power output end of a driver being connected with the stirrer driving; a signal input end of a controller being electrically connected with the detector, a signal output end of the controller being electrically connected with the driver, and the controller being configured to control the driver to drive the stirrer to rotate so as to loosen the materials in the discharging channel when receiving the signal that the detector detects that the blockage occurs in the discharging channel. When the controller receives the signal that the detector detects that the blockage occurs in the discharging channel, the controller controls the driver to drive the stirrer to rotate to automatically loosen the materials in the discharging channel, so that the long cut tobaccos are prevented from being intertwined into a net-shaped structure, and then the materials can flow out of the discharging channel smoothly, and the dust removal efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of cigarette dust removal technology, and in particular to a dust removal device that prevents clogging. Background Technology

[0002] In the cigarette manufacturing process, dust is handled by dust removal devices, which typically include separators that use centrifugal force to separate tobacco fragments from dust in the airflow.

[0003] However, some dust removal pipes often suck in a mixture of long tobacco shreds and high-humidity dust. After being separated by the separator, the long tobacco shreds tend to entangle with each other at the discharge channel, forming a mesh structure that blocks the discharge channel and hinders the discharge.

[0004] Currently, blockage detection typically relies on manual inspections, but this method is prone to delays due to the uncertain timing of blockage discovery. Furthermore, when blockages occur, manually tapping the silo walls or clearing the discharge channel results in low dust removal efficiency. Utility Model Content

[0005] Therefore, it is necessary to provide an automatic dust removal device that can detect and clear blockages.

[0006] This application provides a dust removal device, comprising:

[0007] A separator for separating dust and tobacco shreds, the separator having a discharge port;

[0008] A material discharge bin, wherein the material discharge bin is provided with a discharge channel connected to the discharge port;

[0009] An agitator is provided inside the material hopper, with at least a portion of the agitator located within the discharge channel;

[0010] A detector, installed on the material hopper, is used to detect whether a blockage occurs at the discharge channel;

[0011] A driver, the power output end of which is connected to the stirrer drive;

[0012] The controller has its signal input terminal electrically connected to the detector and its signal output terminal electrically connected to the driver. It is configured to control the driver to rotate the agitator to loosen the material in the discharge channel when the detector detects a blockage in the discharge channel.

[0013] In one embodiment, the detector is a photoelectric sensor, and there are at least two of them, arranged at circumferential intervals along the discharge channel.

[0014] In one embodiment, the dust removal device further includes an alarm, the signal output terminal of the controller is electrically connected to the alarm, and the alarm is configured to issue an alarm signal when the controller receives a message that the discharge channel has been blocked for more than a preset time.

[0015] In one embodiment, the discharge channel is a cone with a cross-sectional area that gradually decreases from top to bottom, and the agitator includes a stirring rod that extends vertically along the side wall of the discharge channel, with the lower end of the stirring rod arranged close to the discharge port of the discharge channel.

[0016] In one embodiment, there are at least two stirring rods, which are arranged at circumferential intervals along the discharge bin, and each stirring rod is connected by a support ring.

[0017] In one embodiment, there are two support rings, namely an upper support ring and a lower support ring arranged sequentially from top to bottom. The inner diameter of the upper support ring is larger than the inner diameter of the lower support ring. The stirring rod includes a connecting section and a stirring section connected sequentially from top to bottom. The power output end of the driver is driven and connected to the connecting section. The stirring section extends along the inclined direction of the side wall of the discharge channel, and part of the stirring section is located below the lower support ring.

[0018] In one embodiment, a connecting plate connected to the separator is sleeved around the separator, the discharge bin is connected to the connecting plate, and at least part of the discharge bin is located below the separator.

[0019] In one embodiment, the agitator is provided with a connecting ring extending circumferentially along the discharge bin. The connecting ring is located inside the discharge bin and below the connecting plate. The connecting plate is provided with at least two sets of roller assemblies arranged circumferentially spaced along the connecting ring. Each roller assembly includes an inner rotating shaft, an outer rotating shaft, an inner roller mounted on the inner rotating shaft, and an outer roller mounted on the outer rotating shaft. Both the inner and outer rotating shafts are rotatably constrained on the connecting plate around their own axes. An outer track is provided on the outer peripheral wall of the connecting ring to slide with the outer roller, and an inner track is provided on the inner peripheral wall of the connecting ring to slide with the inner roller. One of the inner or outer rotating shafts in one set of roller assemblies rotates under the drive of the driver.

[0020] In one embodiment, the dust removal device further includes a drive gear that can rotate under the drive of the driver and a driven gear for driving the outer rotating shaft to rotate. The driver, drive gear and driven gear are all located above the connecting plate. The drive gear is mounted on the power output end of the driver, and the driven gear is mounted on the outer rotating shaft and meshes with the drive gear.

[0021] In one embodiment, the roller assembly further includes a bushing, an upper clamping plate located above the connecting plate, and a lower clamping plate located below the connecting plate. The upper clamping plate, the connecting plate, and the lower clamping plate are respectively provided with a first through hole for the inner rotating shaft to pass through and a second through hole for the outer rotating shaft to pass through. The bushing is detachably fitted on both the outer rotating shaft and the inner rotating shaft. A limiting step is formed on the outer peripheral wall of both the outer rotating shaft and the inner rotating shaft. The upper clamping plate, the connecting plate, and the lower clamping plate are limited between the bushing and the limiting step, and the connecting plate abuts against the upper clamping plate and the lower clamping plate respectively.

[0022] Compared with existing technologies, the dust removal device provided in this application has the following advantages:

[0023] When the detector detects a blockage in the discharge channel, it sends a signal. Upon receiving this signal, the controller activates the driver, which in turn rotates the agitator to automatically loosen the material in the discharge channel. This prevents long tobacco strands from tangling into a mesh-like structure, allowing the material to flow smoothly out of the discharge channel and improving dust removal efficiency. This dust removal device reduces the workload of frequent inspections and manual unblocking by operators, while also avoiding the potential safety risks of manually entering or disassembling narrow hoppers for unblocking. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of a dust removal device according to an embodiment of this application;

[0026] Figure 2 for Figure 1 A sectional view;

[0027] Figure 3 for Figure 2 A magnified view of a section at point I;

[0028] Figure 4 for Figure 1 A cross-sectional view from another angle;

[0029] Figure 5 for Figure 4 Enlarged view of section II in the middle;

[0030] Figure 6 for Figure 1A partial structural diagram.

[0031] Reference numerals: 1. Separator; 11. Discharge port; 12. Connecting plate; 13. Cover plate; 2. Feed hopper; 20. Feed channel; 21. Discharge channel; 211. Discharge port; 3. Agitator; 31. Lower support ring; 32. Agitating rod; 321. Connecting section; 322. Agitating section; 33. Upper support ring; 4. Detector; 5. Driver; 51. Drive gear; 52. Driven gear; 6. Connecting ring; 61. Outer track; 62. Inner track; 7. Roller assembly; 71. Inner rotating shaft; 72. Outer rotating shaft; 73. Inner roller; 74. Outer roller; 75. Bushing; 701. Limiting step; 76. Upper clamping plate; 761. First groove; 77. Lower clamping plate; 771. Second groove; 78. Upper bearing; 79. Lower bearing; 81. First connecting piece; 82. Second connecting piece. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0034] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, and may be at an angle to the axial direction.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0038] like Figures 1-6 As shown, this application discloses a dust removal device. The dust removal device includes a separator 1, a discharge hopper 2, an agitator 3, a detector 4, a driver 5, and a controller. The separator 1 is used to separate dust and tobacco shreds, and it has a discharge port 11. The discharge hopper 2 has a discharge channel 21 connected to the discharge port 11. The agitator 3 is located inside the discharge hopper 2, with at least a portion of the agitator 3 situated within the discharge channel 21. The detector 4 is located on the discharge hopper 2 and is used to detect whether a blockage has occurred in the discharge channel 21.

[0039] The power output terminal of the driver 5 is connected to the agitator 3. The signal input terminal of the controller is electrically connected to the detector 4, and the signal output terminal of the controller is electrically connected to the driver 5. The controller is configured to control the driver 5 to rotate the agitator 3 to automatically loosen the material in the discharge channel 21 when the detector 4 detects a blockage in the discharge channel 21.

[0040] Understandably, when detector 4 detects a blockage in discharge channel 21, it sends a signal. Upon receiving this signal, the controller activates driver 5, which in turn rotates agitator 3 to automatically loosen the material in discharge channel 21. This prevents long tobacco strands from tangling into a mesh-like structure, allowing the material to flow smoothly out of discharge channel 21 and improving dust removal efficiency. This dust removal device reduces the workload of frequent inspections and manual unblocking by operators, while also avoiding the potential safety risks of manually entering or disassembling narrow hoppers for unblocking. Furthermore, it significantly reduces unplanned downtime caused by blockages, ensuring the stable and efficient operation of the production process.

[0041] like Figure 1 As shown, the detector 4 is a photoelectric sensor, and there are at least two detectors 4, which are arranged at circumferential intervals along the discharge channel 21. Schematic, there may be two, three, four, or more detectors 4.

[0042] Understandably, the presence of at least two detectors 4 allows for better detection of blockages in the discharge channel 21. The photoelectric sensor can monitor material height and flowability in real time and with high accuracy, providing a reliable basis for automatic unblocking control.

[0043] It should be noted that when detector 4 detects that the blockage time exceeds the set threshold (e.g., 15 seconds), the controller controls drive 5 to rotate stirrer 3 for a certain period of time. If no blockage signal is detected, drive 5 stops working. When a blockage signal is detected, drive 5 continues to work.

[0044] Furthermore, the dust removal device also includes an alarm (not shown in the figure), the signal output terminal of the controller is electrically connected to the alarm, and the alarm is configured to issue an alarm signal when the controller receives a message that the discharge channel 21 has been blocked for a period of time exceeding a preset time.

[0045] Understandably, when detector 4 detects a blockage in discharge channel 21 for more than a preset time, such as more than 20 minutes, the controller receives the blockage signal and activates the alarm. In this way, the alarm can promptly alert operators to handle persistent blockages or potential equipment malfunctions, facilitating remote monitoring and centralized management, and improving the reliability of the dust removal device.

[0046] To facilitate manual activation of the drive unit 5, the aforementioned dust removal device also includes a control button for operating the drive unit 5. This retains necessary manual intervention, allowing the system to better adapt to complex and changing operating conditions. Furthermore, the controller prevents unnecessary idling of the drive unit 5, extending the service life of key components such as the drive unit 5.

[0047] In addition, the bottom of the aforementioned discharge channel 21 has a discharge port 211. An inspection port is provided on the side wall of the aforementioned discharge channel 21, and a cover plate 13 is provided at the inspection port to open or close it. Thus, maintenance can be performed through the inspection port into the discharge bin 2.

[0048] In this embodiment, such as Figure 2 As shown, the aforementioned discharge channel 21 is a cone shape with a cross-sectional area that gradually decreases from top to bottom. Figure 2 and Figure 6 As shown, the agitator 3 includes an agitator rod 32, which extends vertically along the side wall of the discharge channel 21, with the lower end of the agitator rod 32 positioned close to the discharge port 211 of the discharge channel 21. Thus, during rotation, the lower end of the agitator rod 32 reliably agitates the discharge channel 21, preventing blockage of the discharge channel 21 near the discharge port 211.

[0049] Furthermore, there are at least two stirring rods 32, arranged at intervals along the circumference of the discharge bin 2, and each stirring rod 32 is connected by a support ring. Thus, when rotating, the agitator has a wide coverage area, covering the inner circumference of the discharge channel 21, effectively crushing and loosening various types of obstructing materials, thereby achieving reliable loosening and high-efficiency unblocking. The presence of the support rings reliably supports the stirring rods 32, preventing deformation due to excessive material adhesion during operation.

[0050] In addition, such as Figure 2 As shown, the aforementioned discharge bin 2 is also equipped with a feeding channel 20, which is connected to the discharge channel 21 from top to bottom. In this embodiment, the feeding channel 20 and the discharge channel 21 form the inner cavity of the discharge bin 2. Figure 2 and Figure 6 As shown, there are two support rings, namely an upper support ring 33 and a lower support ring 31 arranged sequentially from top to bottom. Both the upper support ring 33 and the lower support ring 31 are annular and extend along the circumference of the discharge bin 2. The upper support ring 33 is located in the feeding channel 20, and the lower support ring 31 is located in the discharge channel 21.

[0051] Understandably, the aforementioned agitator 3 can loosen the materials in the discharge channel 21 and the feed channel 20, preventing long tobacco shreds in the discharge bin 2 from tangling and forming a mesh structure. The upper support ring 33 and the lower support ring 31 reliably support the agitator rod 32.

[0052] like Figure 2 and Figure 6As shown, the inner diameter of the upper support ring 33 is larger than the inner diameter of the lower support ring 31. The stirring rod 32 includes a connecting section 321 and a stirring section 322 connected sequentially from top to bottom. The power output end of the driver 5 is driven to connect to the connecting section 321, which is arranged vertically. The stirring section 322 extends along the inclined direction of the side wall of the discharge channel 21, and part of the stirring section 322 is located below the lower support ring 31. In this way, the stirring section 322 matches the side wall of the discharge channel 21, which can better prevent the long tobacco shreds in the discharge channel 21 from tangling and forming a mesh structure.

[0053] In addition, such as Figure 2 and Figure 3 As shown, a connecting plate 12 is fitted around the separator 1 and connected to it. The discharge bin 2 is connected to the connecting plate 12, and at least part of the discharge bin 2 is located below the separator 1. In this way, the separator 1 and the discharge bin 2 are arranged vertically, so that the separated material can enter the discharge bin 2 more reliably.

[0054] It should be noted that the separator 1 mentioned above is a cyclone separator 1 or other separator 1, as long as it can separate dust and tobacco shreds. The separator 1 in this embodiment is different from the cyclone separator 1 in the prior art, and will not be described again in this embodiment.

[0055] To connect the drive unit 5 to the drive unit 3, such as... Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the agitator 3 is provided with a connecting ring 6 extending circumferentially along the discharge bin 2, and the connecting ring 6 is connected to the connecting section 321. The connecting ring 6 is located inside the discharge bin 2 and below the connecting plate 12. The connecting plate 12 is provided with at least two sets of roller assemblies 7 arranged circumferentially along the connecting ring 6. The roller assembly 7 includes an inner rotating shaft 71, an outer rotating shaft 72, an inner roller 73 mounted on the inner rotating shaft 71, and an outer roller 74 mounted on the outer rotating shaft 72. The inner rotating shaft 71 and the outer rotating shaft 72 are both constrained to the connecting plate 12 so as to rotate around their own axes. The outer peripheral wall of the connecting ring 6 is provided with an outer track 61 that slides with the outer roller 74, and the inner peripheral wall of the connecting ring 6 is provided with an inner track 62 that slides with the inner roller 73. The inner rotating shaft 71 or the outer rotating shaft 72 in one set of roller assemblies 7 rotates under the drive of the driver 5.

[0056] Understandably, the roller assembly 7 uses an inner roller 73 and an outer roller 74 in sliding engagement with the connecting ring 6 to hold the connecting ring 6 in place. When the driver 5 drives the outer roller 74 or the inner roller 73 to rotate, it can drive the connecting ring 6 to rotate stably. At least two sets of roller assemblies 7 ensure high-speed, stable, and low-resistance rotation of the agitator 3 within the feed hopper 2, preventing the connecting ring 6 from swaying or jamming, and further reliably guaranteeing the stable rotation of the connecting ring 6.

[0057] Indicatively, the roller assembly 7 described above may have two, three, four, or more sets. This embodiment uses a four-set roller assembly 7 as an example for illustration.

[0058] In one embodiment, the aforementioned driver 5 can directly drive the inner rotating shaft 71 or the outer rotating shaft 72 to rotate, or it can indirectly drive the inner rotating shaft 71 or the outer rotating shaft 72 to rotate. In this embodiment, as... Figures 1-3 As shown, the driver 5 indirectly drives the outer rotating shaft 72 to rotate. Specifically, the dust removal device also includes a drive gear 51 that can rotate under the drive of the driver 5 and a driven gear 52 for driving the outer rotating shaft 72 to rotate. The driver 5, drive gear 51 and driven gear 52 are all located above the connecting plate 12. The drive gear 51 is mounted on the power output end of the driver 5, and the driven gear 52 is mounted on the outer rotating shaft 72 and meshes with the drive gear 51.

[0059] It is understandable that the aforementioned drive 5, drive gear 51 and driven gear 52 are located outside the discharge bin 2 for easy daily maintenance and replacement.

[0060] To ensure reliable installation of the roller assembly 7 and the connecting plate 12, such as Figure 3 and Figure 5 As shown, the roller assembly 7 further includes a bushing 75, an upper clamping plate 76 located above the connecting plate 12, and a lower clamping plate 77 located below the connecting plate 12. The upper clamping plate 76, the connecting plate 12, and the lower clamping plate 77 are respectively provided with a first through hole for the inner rotating shaft 71 to pass through and a second through hole for the outer rotating shaft 72 to pass through. The bushing 75 is detachably fitted on both the outer rotating shaft 72 and the inner rotating shaft 71. The driven gear 52 is fixed on the bushing 75 of the outer rotating shaft 72. A limiting step 701 is formed on the outer peripheral wall of both the outer rotating shaft 72 and the inner rotating shaft 71. The upper clamping plate 76, the connecting plate 12, and the lower clamping plate 77 are limited between the bushing 75 and the limiting step 701, and the connecting plate 12 abuts against the upper clamping plate 76 and the lower clamping plate 77 respectively.

[0061] To achieve a detachable connection of the bushing 75, the inner rotating shaft 71 and its corresponding bushing 75 each have a first connecting hole for the first connecting member 81 to pass through, while the outer rotating shaft 72 and its corresponding bushing 75 each have a second connecting hole for the second connecting member 82 to pass through. Thus, the inner rotating shaft 71 is installed to the corresponding bushing 75 by the first connecting member 81 passing through the first connecting hole, and the outer rotating shaft 72 is installed to the corresponding bushing 75 by the second connecting member 82 passing through the second connecting hole. The first connecting member 81 and the second connecting member 82 can be screws.

[0062] To make the inner rotating shaft 71 and the outer rotating shaft 72 rotate more smoothly, such as Figure 3 and Figure 5 As shown, both the inner rotating shaft 71 and the outer rotating shaft 72 are fitted with upper bearings 78 and lower bearings 79 arranged at intervals from top to bottom. The top of the upper clamping plate 76 has a first groove 761, in which the upper bearing 78 is fitted and abuts against the bottom surface of the corresponding bushing 75. The bottom of the lower bearing 79 has a second groove 771, in which the lower bearing 79 is fitted and abuts against the top surface of the limiting step 701.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A dust removal device, comprising: A separator (1) is used to separate dust and tobacco dust, and the separator (1) is provided with a discharge port (11); The dust removal device is characterized in that it further includes: The material discharge bin (2) is provided with a discharge channel (21) connected to the discharge port (11); A mixer (3) is located in the discharge bin (2), and at least part of the mixer (3) is located in the discharge channel (21); A detector (4) is installed on the discharge hopper (2) to detect whether a blockage occurs at the discharge channel (21); The driver (5) is connected to the stirrer (3) via a drive. The controller has its signal input terminal electrically connected to the detector (4) and its signal output terminal electrically connected to the driver (5). It is configured to control the driver (5) to drive the agitator (3) to rotate and loosen the material in the discharge channel (21) when the detector (4) detects that the discharge channel (21) is blocked.

2. The dust extraction device of claim 1, wherein The detector (4) is a photoelectric sensor, and there are at least two of them, which are arranged at circumferential intervals along the discharge channel (21).

3. The dust extraction device of claim 1, wherein It also includes an alarm, the signal output terminal of the controller is electrically connected to the alarm, and the alarm is configured to issue an alarm signal when the controller receives a message that the discharge channel (21) has been blocked for more than a preset time.

4. The dust extraction device of claim 1, wherein The discharge channel (21) is a cone with a cross-sectional area that gradually decreases from top to bottom. The agitator (3) includes a stirring rod (32), which extends up and down along the side wall of the discharge channel (21), and the lower end of the stirring rod (32) is arranged close to the discharge port (211) of the discharge channel (21).

5. The dust extraction device of claim 4, wherein There are at least two stirring rods (32), which are arranged at intervals along the circumference of the discharge bin (2), and each stirring rod (32) is connected by a support ring.

6. The dust extraction device of claim 5, wherein There are two support rings, namely an upper support ring (33) and a lower support ring (31) arranged from top to bottom. The inner diameter of the upper support ring (33) is larger than the inner diameter of the lower support ring (31). The stirring rod (32) includes a connecting section (321) and a stirring section (322) connected from top to bottom. The power output end of the driver (5) is driven to be connected to the connecting section (321). The stirring section (322) extends along the inclined direction of the side wall of the discharge channel (21), and part of the stirring section (322) is located below the lower support ring (31).

7. The dust extraction device of any one of claims 1 to 6, wherein, The separator (1) is surrounded by a connecting plate (12) connected to the separator (1), the discharge bin (2) is connected to the connecting plate (12), and at least part of the discharge bin (2) is located below the separator (1).

8. The dust extraction device of claim 7, wherein, The agitator (3) is provided with a connecting ring (6) extending circumferentially along the discharge bin (2). The connecting ring (6) is located inside the discharge bin (2) and below the connecting plate (12). The connecting plate (12) is provided with at least two sets of roller assemblies (7) arranged circumferentially at intervals along the connecting ring (6). The roller assembly (7) includes an inner rotating shaft (71), an outer rotating shaft (72), an inner roller (73) mounted on the inner rotating shaft (71), and rollers (73) mounted on the outer rotating shaft (72). The outer roller (74), the inner rotating shaft (71) and the outer rotating shaft (72) are both rotatably constrained on the connecting plate (12) around their own axis. The outer peripheral wall of the connecting ring (6) is provided with an outer track (61) that slides with the outer roller (74), and the inner peripheral wall of the connecting ring (6) is provided with an inner track (62) that slides with the inner roller (73). The inner rotating shaft (71) or the outer rotating shaft (72) in a set of roller assemblies (7) rotates under the drive of the driver (5).

9. The dust extraction device of claim 8, wherein, It also includes a drive gear (51) that can rotate under the drive of the driver (5) and a driven gear (52) for driving the outer rotating shaft (72) to rotate. The driver (5), drive gear (51) and driven gear (52) are all located above the connecting plate (12). The drive gear (51) is mounted on the power output end of the driver (5), and the driven gear (52) is mounted on the outer rotating shaft (72) and meshes with the drive gear (51).

10. The dust extraction device of claim 8, wherein, The roller assembly (7) further includes a bushing (75), an upper clamping plate (76) located above the connecting plate (12), and a lower clamping plate (77) located below the connecting plate (12). The upper clamping plate (76), the connecting plate (12), and the lower clamping plate (77) are respectively provided with a first through hole for the inner rotating shaft (71) to pass through and a second through hole for the outer rotating shaft (72) to pass through. The bushing (75) is detachably fitted on both the outer rotating shaft (72) and the inner rotating shaft (71). A limiting step (701) is formed on the outer peripheral wall of both the outer rotating shaft (72) and the inner rotating shaft (71). The upper clamping plate (76), the connecting plate (12), and the lower clamping plate (77) are limited between the bushing (75) and the limiting step (701), and the connecting plate (12) abuts against the upper clamping plate (76) and the lower clamping plate (77) respectively.

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