A dust filtering mechanism with self-cleaning function for paperboard processing

Abstract

This invention discloses a self-cleaning dust filtration mechanism for cardboard processing, relating to the field of dust filtration technology in cardboard processing. It includes an adjustment unit mounted on top of a fixed frame to prevent dust overflow, and a cleaning unit that works in conjunction with the adjustment unit to periodically clean the dust inside the dust collection hopper. The top of the fixed frame is equipped with elastic ropes whose thickness changes with pulses. The dust collection hopper contains a first dust collection plate and a second dust collection plate for collecting dust. This invention utilizes a fixed rod at the top of the lifting frame that engages with the inclined groove of a rotating ring to convert displacement along the inclined groove into circumferential rotation of the rotating ring. As the rotating ring deflects, the elastic ropes are simultaneously tightened, dynamically increasing the gap between adjacent elastic ropes and providing a smooth falling channel for dust. Furthermore, the first and second dust collection plates flip from a horizontal to a vertical state, causing dust adhering to their surfaces to fall into the bottom of the dust collection hopper and be collected by an external collection system.

Description

Technical Field

[0001] This invention relates to the technical field of dust filtration mechanisms for cardboard processing, specifically a dust filtration mechanism with self-cleaning function for cardboard processing. Background Technology

[0002] During paperboard processing, operations such as cutting, grinding, and drilling cause fiber breakage, and material characteristics (paperboard itself is composed of fibers and fillers, making it easily broken under friction or impact) and environmental factors (fibers are more prone to breakage and airborne under dry conditions) generate a large amount of dust. These factors work together to cause dust to be continuously generated during the processing, affecting the working environment and worker health. If the dust is not treated, it can easily cause respiratory diseases in workers, pollute the workshop environment, accelerate equipment wear, and affect product quality. Dust filtration mechanisms, by efficiently capturing and removing suspended particles, reduce equipment maintenance costs, thereby achieving safe and sustainable paperboard production.

[0003] Traditional dust filtration systems for cardboard processing with self-cleaning functions often employ pulse-jet bag filters. During operation, dust-laden gas is drawn into the dust collector by a fan, where dust is intercepted on the outer surface of the filter cartridge, while clean air is discharged through the filter bag. As dust accumulates, the system triggers compressed air via a pulse controller, which then sprays high-pressure air into the filter bag through the jet pipe. This causes the filter bag to expand and shake, dislodging the attached dust into the dust collection hopper, thus achieving automatic dust removal. However, during pulse-jet cleaning, the impact force of the compressed air may cause the dust in the dust collection hopper to be re-erected. This re-erected dust will re-enter the filtration system, increasing the burden on the filter bag, filter cartridge, or other filtration elements, leading to a decrease in filtration efficiency.

[0004] During pulse jet cleaning, each filter cartridge needs to be pulsed. The instantaneous impact of compressed air during the pulse causes the filter bag to expand violently and vibrate at high frequency. As a result, the dust layer attached to the surface of the filter bag is peeled off over a large area and falls into the dust collection hopper. Since the dust itself is lightweight, fine, or highly sticky, it is easy to be re-entrained by the airflow. When the first pulse ends and the second pulse begins, a large amount of dust accumulates in the dust collection hopper. Due to the high airflow velocity inside or near the dust collection hopper, or the improper airflow direction, the dust will be re-entrained. It is necessary to deal with the dust accumulated inside the dust collection hopper in time to prevent the dust remaining in the dust collection hopper from being re-entrained during the next pulse.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing dust filtration mechanisms with self-cleaning functions used in cardboard processing. Summary of the Invention

[0006] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the purpose of this invention is to provide a dust filtration mechanism with a self-cleaning function for cardboard processing. This addresses the issues raised in the background, such as the impact force of compressed air during pulse jet cleaning causing dust in the dust collection hopper to be re-erected, leading to secondary dust re-entering the filtration system, increasing the burden on filter bags, filter cartridges, or other filter elements, resulting in decreased filtration efficiency, and the problem that the pulse jet cleans filter cartridges one by one, causing the impact force of the next pulse to carry away dust collected in the dust collection hopper from the previous pulse.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dust filtration mechanism with self-cleaning function for cardboard processing, comprising a dust collector body and a dust collection hopper for collecting dust, a fixing frame for fixing the dust collection hopper, an adjustment unit disposed on the top of the fixing frame to prevent dust from overflowing, and a cleaning unit that works in conjunction with the adjustment unit to periodically clean the dust inside the dust collection hopper, wherein the top of the fixing frame is provided with an elastic rope for changing its thickness in conjunction with pulses, and the dust collection hopper is provided with a first dust collection plate and a second dust collection plate for collecting dust.

[0008] Preferably, the adjustment unit includes a rotating shaft, a turntable, a fixed block, a lifting frame, a rotating ring, and an inclined groove. The rotating shaft is provided on the top of the disc of the fixed frame and passes through the fixed frame. The turntable is fixedly connected to both ends of the rotating shaft. The fixed block is fixedly connected to one side of the turntable through the fixed shaft. The lifting frame is movably connected to the outside of the fixed block. The rotating ring is provided on the top of the lifting frame, and the bottom of the rotating ring has an inclined groove that cooperates with the lifting frame to rotate.

[0009] Preferably, the lifting frame is provided with a sliding frame in the middle to slide with the fixed block, and the top and bottom of the sliding frame of the lifting frame are fixedly connected with fixed rods, and the bottom of the fixed frame is fixedly connected with a limiting block to guide the lifting frame.

[0010] Preferably, a connecting member is provided between the rotating ring and the fixed frame, and a fixed ring is fixed inside the fixed frame.

[0011] Preferably, a motor is fixedly connected to one side of the fixing frame, the output end of the motor is fixedly connected to the rotating shaft via a belt, and a dust-removing plate is fixed to the outer wall of the rotating shaft.

[0012] Preferably, the elastic rope is evenly fixed inside the rotating ring, and the elastic rope passes through the fixed ring and the fixed frame.

[0013] Preferably, the cleaning assembly includes a cam, a sliding plate, a first rotating disk, a first dust collection plate, a second rotating disk, a second dust collection plate, and a second spring. The outer wall of the rotating shaft is fixedly connected to the cam, and the bottom of the cam is provided with a sliding plate. The first rotating disk is movably connected to one side of the sliding plate, and the second rotating disk is movably connected to the other side of the sliding plate. The first rotating disk is fixedly connected to the first dust collection plate, and the second rotating disk is fixedly connected to the second dust collection plate. Two sets of second springs are provided between the sliding plate and the fixed frame.

[0014] Preferably, one end of the second spring is fixed to the bottom of the fixing frame, and the other end of the second spring is fixed to the top of the sliding plate.

[0015] Preferably, one side of the sliding plate has a groove that cooperates with the rotation of the first rotating disk, and the other side of the sliding plate has a groove that cooperates with the rotation of the second rotating disk.

[0016] Preferably, both the first dust collection plate and the second dust collection plate are movably connected to a buffer block via a first spring, and the buffer block is provided with an inclined surface for sliding under pressure.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The turntable is driven by a motor to rotate. The turntable, through an eccentric structure, drives the fixed block to reciprocate along the sliding frame of the lifting frame. The fixed rod at the top of the lifting frame is embedded in the inclined groove of the rotating ring. When the fixed rod moves with the lifting frame, its displacement along the inclined groove is converted into the circumferential rotation of the rotating ring. Multiple sets of elastic ropes are evenly distributed inside the rotating ring. As the rotating ring deflects, the elastic ropes are synchronously tightened, dynamically increasing the gap between adjacent elastic ropes. During the pulse jet cleaning stage, the dust accumulated on the surface of the filter cartridge is peeled off by the airflow impact. At this time, the increased gap between the elastic ropes provides a smooth falling channel for the dust, ensuring that it falls quickly into the dust collection hopper and avoiding secondary dust re-entrainment due to airflow turbulence. Furthermore, a dust shaking plate is installed on the rotating shaft. When the shaft rotates, the dust shaking plate periodically agitates the elastic ropes, causing them to vibrate at high frequency and amplitude. The vibration can break the adhesion layer of dust on the surface of the elastic ropes, preventing fine particles from accumulating and forming clumps. The tension of the elastic ropes changes dynamically during the shaking process, further promoting the uniform distribution of gaps and preventing local blockage.

[0019] 2. The cam is driven by a motor to rotate, and the cam pushes the sliding plate to move vertically downward. The sliding plate has two sets of grooves, which cooperate with the transmission pins of the first and second rotating disks respectively. When the sliding plate moves down, the grooves convert its linear motion into the rotational motion of the rotating disks, causing the two rotating disks to rotate 90 degrees in opposite directions synchronously. This causes the first and second dust collection plates to flip from a horizontal state to a vertical state, allowing the dust attached to the surfaces of the first and second dust collection plates to fall freely under gravity and directly into the bottom of the dust collection hopper for collection by an external negative pressure collection system. When the first and second dust collection plates are flipped into place, buffer blocks are symmetrically placed at the impact position. The cooperation between the buffer blocks and the first spring effectively avoids wear caused by direct collision between the first and second dust collection plates. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the dust collection hopper of the present invention.

[0023] Figure 4 This is an unfolded view of the internal structure of the adjustment component of the present invention.

[0024] Figure 5 This is a bottom view of the elastic rope of the present invention.

[0025] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A.

[0026] Figure 7 This is a schematic diagram of the internal structure of the dust collection hopper of the present invention.

[0027] Figure 8 This is a schematic diagram of the dust collection plate structure in a horizontal state according to the present invention.

[0028] Figure 9 This is a schematic diagram of the vertical structure of the dust collection plate of the present invention.

[0029] Figure 10 This is a schematic diagram of the internal structure of the dust collection plate of the present invention.

[0030] In the diagram: 1. Main body of the dust collector; 2. Fixed frame; 301. Rotating shaft; 302. Turntable; 303. Fixed block; 304. Lifting frame; 305. Rotating ring; 306. Elastic rope; 307. Inclined groove; 4. Fixed ring; 5. Limiting block; 6. Belt; 7. Motor; 8. Dust collection hopper; 901. Cam; 902. Sliding plate; 903. First rotating disc; 904. First dust collection plate; 905. Second rotating disc; 906. Second dust collection plate; 907. First spring; 908. Buffer block; 909. Second spring; 10. Dust shaking plate; 11. Connecting parts. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 10 The present invention provides a technical solution: a dust filtration mechanism with self-cleaning function for cardboard processing, including a dust collector body 1 and a dust collection hopper 8 for collecting dust, and also including a fixing frame 2 for fixing the dust collection hopper 8, an adjustment unit set on the top of the fixing frame 2 to prevent dust from overflowing, and a cleaning unit that works with the adjustment unit to clean the dust inside the dust collection hopper 8 at regular intervals. The top of the fixing frame 2 is provided with an elastic rope 306 for changing its thickness in conjunction with pulses. The dust collection hopper 8 is provided with a first dust collection plate 904 and a second dust collection plate 906 for collecting dust.

[0033] In specific implementation, the dust collection hopper 8 is fixed to the bottom of the dust collector body 1 by the fixing frame 2. The top of the dust collection hopper 8 is equipped with an adjustment unit to prevent dust overflow and a timed cleaning unit. When the dust collector body 1 is performing self-cleaning, the elastic rope 306 is dynamically adjusted by the adjustment unit to quickly collect a large amount of dust that is shaken off by the pulse. Together with the first dust collection plate 904 and the second dust collection plate 906 that can be flipped inside the dust collection hopper 8, the dust is efficiently collected and cleaned at regular intervals, preventing the large amount of dust accumulated on the top of the first dust collection plate 904 and the second dust collection plate 906 from being re-entrained.

[0034] As a further embodiment of the present invention, the adjustment unit includes a rotating shaft 301, a turntable 302, a fixed block 303, a lifting frame 304, a rotating ring 305, and an inclined groove 307. The rotating shaft 301 is provided on the top of the disc of the fixed frame 2 and passes through the fixed frame 2. The turntable 302 is fixedly connected to both ends of the rotating shaft 301. The fixed block 303 is fixedly connected to one side of the turntable 302 through the fixed shaft. The lifting frame 304 is movably connected to the outside of the fixed block 303. The rotating ring 305 is provided on the top of the lifting frame 304, and the bottom of the rotating ring 305 is provided with an inclined groove 307 that cooperates with the lifting frame 304 to rotate.

[0035] In specific implementation, the rotating shaft 301 drives the turntables 302 at both ends to rotate. The turntables 302 drive the lifting frame 304 to reciprocate through the fixed block 303. The fixed rod at the top of the lifting frame 304 cooperates with the inclined groove 307 at the bottom of the rotating ring 305 to convert the lifting motion of the lifting frame 304 into the rotational motion of the rotating ring 305, thereby realizing the dynamic adjustment of the gap of the elastic rope 306. This ensures that after the pulse, the dust falls quickly into the dust collection hopper 8 through the increased gap of the elastic rope 306.

[0036] As a further embodiment of the present invention, a sliding frame is provided in the middle of the lifting frame 304 to slide in conjunction with the fixed block 303, and a fixed rod is fixedly connected to the top and bottom of the sliding frame of the lifting frame 304, and a limiting block 5 is fixedly connected to the bottom of the fixed frame 2 to guide the lifting frame 304.

[0037] In practice, the fixed block 303 slides back and forth in the sliding frame in the middle of the lifting frame 304, driving the lifting frame 304 to move as a whole. The fixed rods at the upper and lower ends of the lifting frame 304 cooperate with the limit block 5 to form a guide system, ensuring that the lifting movement of the lifting frame 304 is smooth, while limiting its movement stroke, providing a stable power transmission basis for the rotation of the rotating ring 305.

[0038] As a further embodiment of the present invention, a connecting member 11 is provided between the rotating ring 305 and the fixed frame 2, and a fixed ring 4 is fixed inside the fixed frame 2.

[0039] In practice, the rotating ring 305 is fixed to the outside of the fixed frame 2 by the connector 11. At the same time, the connector 11 provides a stable support structure and a limiting structure for the rotating ring 305, so that the rotating ring 305 can rotate outside the fixed frame 2, thereby ensuring the stability and reliability of the elastic rope 306 gap adjustment.

[0040] As a further embodiment of the present invention, a motor 7 is fixedly connected to one side of the fixed frame 2, and the output end of the motor 7 is fixedly connected to the rotating shaft 301 via a belt 6. A dust-shaking plate 10 is fixed to the outer wall of the rotating shaft 301.

[0041] In practice, the motor 7 provides driving force, which drives the rotating shaft 301 to rotate via the belt 6. The dust-shaking plate 10 fixed on the outer wall of the rotating shaft 301 rotates accordingly, realizing the periodic plucking of the elastic rope 306, which produces a vibration and dust-cleaning effect on the elastic rope 306, thereby preventing dust from accumulating on the surface of the elastic rope 306.

[0042] As a further embodiment of the present invention, the elastic rope 306 is uniformly fixed inside the rotating ring 305, and the elastic rope 306 passes through the fixing ring 4 and the fixing frame 2.

[0043] In practice, multiple sets of elastic ropes 306 are evenly fixed inside the rotating ring 305 and pass through the fixed ring 4 and the fixed frame 2. When the rotating ring 305 rotates, it drives the elastic ropes 306 to be tensioned or relaxed synchronously, dynamically adjusting the gap between adjacent elastic ropes 306. The gap increases to facilitate the rapid passage of dust into the dust collection hopper 8 during pulse cleaning, while the gap decreases to form a dust barrier to prevent secondary dust re-entrainment, thereby achieving the dust filtration and collection functions.

[0044] As a further embodiment of the present invention, the cleaning component includes a cam 901, a sliding plate 902, a first rotating disk 903, a first dust collection plate 904, a second rotating disk 905, a second dust collection plate 906, and a second spring 909. The cam 901 is fixedly connected to the outer wall of the rotating shaft 301. The sliding plate 902 is provided at the bottom of the cam 901. The first rotating disk 903 is movably connected to one side of the sliding plate 902, and the second rotating disk 905 is movably connected to the other side of the sliding plate 902. The first rotating disk 903 is fixedly connected to the first dust collection plate 904, and the second rotating disk 905 is fixedly connected to the second dust collection plate 906. Two sets of second springs 909 are provided between the sliding plate 902 and the fixed frame 2.

[0045] In specific implementation, the rotating shaft 301 drives the cam 901 to rotate, which in turn pushes the sliding plate 902 to overcome the resistance of the second spring 909 and make linear motion. The sliding plate 902 converts the linear motion of the sliding plate 902 into the synchronous reverse rotation of the first rotating disk 903 and the second rotating disk 905 connected on both sides, thereby driving the fixedly connected first dust collection plate 904 and second dust collection plate 906 to achieve 90-degree flipping and unloading, completing the automatic cleaning of dust on the dust collection plate. The second spring 909 provides a reset elastic force to the sliding plate 902 so that the first dust collection plate 904 and the second dust collection plate 906 return to the horizontal state.

[0046] As a further embodiment of the present invention, one end of the second spring 909 is fixed to the bottom of the fixing frame 2, and the other end of the second spring 909 is fixed to the top of the sliding plate 902.

[0047] In specific implementation, by fixing the two ends of the second spring 909 to the bottom of the fixed frame 2 and the top of the sliding plate 902 respectively, when the sliding plate 902 is pushed down by the cam 901, the second spring 909 is stretched to store energy. When the cam 901 rotates to the return stage, the second spring 909 releases elastic potential energy to drive the sliding plate 902 to automatically reset, thereby realizing the periodic reciprocating motion of the cleaning component and ensuring that the first dust collection plate 904 and the second dust collection plate 906 can accurately return to the horizontal dust collection state after being flipped and unloaded.

[0048] As a further embodiment of the present invention, a sliding groove is provided on one side of the sliding plate 902 to cooperate with the rotation of the first rotating disk 903, and a sliding groove is provided on the other side of the sliding plate 902 to cooperate with the rotation of the second rotating disk 905.

[0049] In specific implementation, by symmetrically arranged sliding grooves on both sides of the sliding plate 902, when the sliding plate 902 is driven by the cam 901 to make linear motion, the sliding grooves on both sides cooperate with the transmission pins of the first rotating disk 903 and the second rotating disk 905 respectively, converting the linear motion of the sliding plate 902 into the synchronous reverse rotation motion of the two first rotating disks 903 and the second rotating disk 905, thereby driving the first dust collection plate 904 and the second dust collection plate 906 to achieve coordinated flipping and unloading actions.

[0050] As a further embodiment of the present invention, both the first dust collection plate 904 and the second dust collection plate 906 are movably connected to a buffer block 908 through a first spring 907, and the buffer block 908 is provided with an inclined surface for cooperation with squeezing and sliding.

[0051] In specific implementation, a buffer block 908 with an inclined surface is set inside the first dust collection plate 904 and the second dust collection plate 906, and an elastic connection is achieved by using a first spring 907. When the two dust collection plates are flipped to the closed position, the inclined surfaces of the buffer block 908 come into contact with each other and squeeze, causing the first spring 907 to compress and store energy. Through elastic deformation, the impact energy is effectively absorbed, achieving smooth buffering and avoiding wear caused by direct collision between the first dust collection plate 904 and the second dust collection plate 906. At the same time, it ensures that the first dust collection plate 904 and the second dust collection plate 906 are accurately positioned.

[0052] Working principle: When using the dust filtration mechanism for cardboard processing, dust-laden gas is drawn into the dust collector body 1 by the fan. Fine dust particles are efficiently intercepted by the outer surface of the filter cartridge, while larger dust particles enter the dust collection hopper 8 through the gaps between the elastic ropes 306 due to their own weight and accumulate on the top of the first dust collection plate 904 and the second dust collection plate 906. At this time, the evenly distributed elastic ropes 306 form a physical barrier, effectively suppressing the airflow disturbance inside the dust collection hopper 8 and preventing the dust from being re-entrained.

[0053] When dust accumulates on the surface of the filter cartridge to a set threshold, the system initiates an automatic cleaning program. Each filter cartridge needs to be cleaned individually. The system triggers compressed air via a pulse controller, which is then sprayed into the filter cartridge via a blowpipe, causing the filter bag to expand and shake, dislodging the attached dust. Immediately after the pulse cleaning, the controller starts motor 7. Motor 7 drives the rotating shaft 301 via belt 6, which in turn drives the turntable 302. The eccentric structure of the turntable 302 causes the fixed block 303 to slide within the movable frame inside the lifting frame 304, causing the lifting frame 304 to reciprocate under the action of the limit block 5. When the fixed rod at the top of the lifting frame 304 is embedded in the inclined groove 307 of the rotating ring 305, the connecting piece 11 rotates... The position of the rotating ring 305 is limited, and its displacement along the inclined groove 307 is converted into the rotational motion of the rotating ring 305. Multiple sets of elastic ropes 306 are evenly distributed inside the rotating ring 305. As the rotating ring 305 deflects, the elastic ropes 306 are synchronously tightened, which dynamically increases the gap between adjacent elastic ropes 306, making it easier for a large amount of dust shaken off by the pulse to quickly enter the dust collection hopper 8. After the dust removal is completed, the rotating ring 305 returns to its original position, the gap between the elastic ropes 306 is restored, and the tightly arranged elastic ropes 306 effectively block the airflow and prevent the dust from being raised again. When the rotating shaft 301 rotates, it synchronously drives the dust shaking plate 10 to rotate. The rotation of the dust shaking plate 10 moves the elastic ropes 306 to vibrate. The vibration can destroy the dust adhesion layer on the surface of the elastic ropes 306, avoiding the accumulation of fine particles to form caking.

[0054] Meanwhile, when one pulse cleaning cycle ends and before the next begins, a large amount of dust accumulates on the top of the first dust collection plate 904 and the second dust collection plate 906. The controller starts the motor 7, which drives the rotating shaft 301 to rotate. The rotation of the rotating shaft 301 drives the cam 901, which is fixedly connected to it, to rotate. The cam 901 pushes the sliding plate 902 to move vertically downwards within the side plate of the dust collection hopper 8. The sliding plate 902 has two sets of grooves, which respectively engage with the transmission pins of the first rotating disk 903 and the second rotating disk 905. When the sliding plate 902 moves downwards, the grooves convert the linear motion of the sliding plate 902 into the rotational motion of the first rotating disk 903 and the second rotating disk 905, causing the first rotating disk 903 and the second rotating disk 905 to rotate synchronously in opposite directions by 90 degrees. When the moving disk 903 and the second rotating disk 905 rotate, the first dust collecting plate 904 and the second dust collecting plate 906 flip from a horizontal state to a vertical unloading state. The dust adhering to the surfaces of the first dust collecting plate 904 and the second dust collecting plate 906 falls freely under the action of gravity and falls directly into the bottom of the dust collecting hopper 8 for collection by an external negative pressure collection system, realizing continuous discharge of dust. When the first dust collecting plate 904 and the second dust collecting plate 906 are flipped into place, the buffer blocks 908 are symmetrically set at the impact position of the first dust collecting plate 904 and the second dust collecting plate 906. When the first dust collecting plate 904 and the second dust collecting plate 906 collide, the two sets of buffer blocks 908 squeeze and compress the first spring 907, effectively avoiding wear caused by direct collision between the first dust collecting plate 904 and the second dust collecting plate 906.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust filtration mechanism with self-cleaning function for cardboard processing, comprising a dust collector body (1) and a dust collection hopper (8) for collecting dust, characterized in that: It also includes a fixing frame (2) for fixing the dust collection hopper (8), an adjustment unit set on the top of the fixing frame (2) to prevent dust from overflowing, and a cleaning unit that works with the adjustment unit to clean the dust inside the dust collection hopper (8) at regular intervals. The top of the fixing frame (2) is provided with an elastic rope (306) for changing its thickness in conjunction with the pulse. The adjustment unit includes a rotating ring (305), and a connecting piece (11) is provided between the rotating ring (305) and the fixed frame (2). A fixed ring (4) is fixed inside the fixed frame (2). Multiple sets of elastic ropes (306) are evenly fixed inside the rotating ring (305) and pass through the fixed ring (4) and the fixed frame (2). When the rotating ring (305) rotates, it drives the elastic ropes (306) to be tensioned or relaxed synchronously, dynamically adjusting the gap between adjacent elastic ropes (306). The dust collection hopper (8) is provided with a first dust collection plate (904) and a second dust collection plate (906) for collecting dust.

2. The dust filtration mechanism with self-cleaning function for cardboard processing according to claim 1, characterized in that: The adjustment unit further includes a rotating shaft (301), a turntable (302), a fixed block (303), a lifting frame (304), and an inclined groove (307). The rotating shaft (301) is provided on the top of the disc of the fixed frame (2), and the rotating shaft (301) passes through the fixed frame (2). The turntable (302) is fixedly connected to both ends of the rotating shaft (301). The fixed block (303) is fixedly connected to one side of the turntable (302) through the fixed shaft. The fixed block (303) is located outside the fixed block (303). The unit is movably connected to a lifting frame (304), and a rotating ring (305) is provided on the top of the lifting frame (304). A sloping groove (307) is provided at the bottom of the rotating ring (305). The turntable (302) drives the lifting frame (304) to reciprocate through the fixed block (303). The fixed rod at the top of the lifting frame (304) cooperates with the sloping groove (307) at the bottom of the rotating ring (305) to convert the lifting motion of the lifting frame (304) into the rotation motion of the rotating ring (305).

3. A dust filtration mechanism with self-cleaning function for cardboard processing according to claim 2, characterized in that: The lifting frame (304) is provided with a sliding frame that slides with the fixed block (303) in the middle, and the top and bottom of the sliding frame of the lifting frame (304) are fixedly connected with fixed rods; the bottom of the fixed frame (2) is fixedly connected with a limiting block (5) that guides the lifting frame (304).

4. A dust filter mechanism with self-cleaning function for cardboard processing according to claim 1, characterized in that: A motor (7) is fixedly connected to one side of the fixed frame (2). The output end of the motor (7) is fixedly connected to the rotating shaft (301) via a belt (6). A dust-shaking plate (10) is fixed to the outer wall of the rotating shaft (301). When the rotating shaft (301) rotates, the dust-shaking plate (10) periodically moves the elastic rope (306).

5. A dust filter mechanism with self-cleaning function for cardboard processing according to claim 2, characterized in that: The cleaning unit includes a cam (901), a sliding plate (902), a first rotating disk (903), a first dust collection plate (904), a second rotating disk (905), a second dust collection plate (906), and a second spring (909). The cam (901) is fixedly connected to the outer wall of the rotating shaft (301). The sliding plate (902) is provided at the bottom of the cam (901). The first rotating disk (903) is movably connected to one side of the sliding plate (902), and the second rotating disk (905) is movably connected to the other side of the sliding plate (902). The first rotating disk (903) is fixedly connected to the first dust collection plate (904), and the second rotating disk (905) is fixedly connected to the second dust collection plate (906). The sliding plate (902) is connected to the fixed frame (2). Two sets of second springs (909) are provided between them. One end of the second spring (909) is fixed to the bottom of the fixed frame (2), and the other end of the second spring (909) is fixed to the top of the sliding plate (902). A groove is provided on one side of the sliding plate (902) to cooperate with the rotation of the first rotating disk (903). A groove is provided on the other side of the sliding plate (902) to cooperate with the rotation of the second rotating disk (905). When the sliding plate (902) is driven by the cam (901) to make linear motion, the two side grooves cooperate with the transmission pins of the first rotating disk (903) and the second rotating disk (905) respectively, converting the linear motion of the sliding plate (902) into the synchronous reverse rotation motion of the first rotating disk (903) and the second rotating disk (905), so as to realize the coordinated flipping and unloading action.

6. A dust filter mechanism with self-cleaning function for cardboard processing according to claim 5, characterized in that: The first dust collection plate (904) and the second dust collection plate (906) are both movably connected to a buffer block (908) by a first spring (907). The buffer block (908) is provided with an inclined surface that cooperates with the squeezing and sliding. When the first dust collection plate (904) and the second dust collection plate (906) are flipped to the closed position, the inclined surfaces of the buffer block (908) come into contact with each other and squeeze.

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