A dust removal structure and a dust removal device based on an annular air duct and a swing dust suction port

CN122998835APending Publication Date: 2026-10-30XIAJIN HENGFA TEXTILE CO LTD
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Patent Information

Application Number
CN202611082363.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-07-21
Publication Date
2026-10-30

AI Technical Summary

Technical Problem

[0003]在先进环保产业中用于大气污染治理时,环形风道与摆动式吸尘口的除尘装置虽可扩大捕集范围,但灰尘经高速气流直接冲击滤芯,瞬间冲击力集中且强烈,易导致滤芯局部形变甚至破损,同时摆动式吸尘口的摆动力未能有效转化为大面积变位接触力以缓冲粉尘冲击能量,导致除尘系统能耗偏高、滤芯寿命缩短,节能性与耐用性均难以满足工业长期运行需求

Benefits of technology

1、本发明通过除尘摆动件驱动凸杆往复移动,带动接触条往复移动,同时接触件驱动外孔板往复旋转,使吸入的灰尘先经大面积变位接触缓流后再到达分离滤芯,有效避免了高速气流对分离滤芯的瞬间集中冲击,防止其形变破损,显著提高了分离滤芯的耐用性,同时利用除尘过程中摆动式吸尘口自身的摆动力,直接转化为驱动接触条往复移动和外孔板往复旋转的动力,无需额外消耗多余动力设备,以及动力设备的布置能源即可实现大面积变位缓流,降低了整体能耗,使节能性与耐用性兼备。

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Abstract

The application discloses a dust removal structure and a dust removal device based on an annular air duct and a swing dust suction port, and particularly relates to the technical field of dust removal and filtration, and comprises a filter box, a separation filter core, a convex rod, a dust removal swing piece and a contact piece; the filter box is internally provided with the separation filter core for filtering dust; the convex rod is arranged on one side of the separation filter core and is in sliding connection with the filter box; the dust removal swing piece is installed on the bottom end of the outer wall of the convex rod; and the contact piece is installed on one end of the convex rod. The application has the advantages that the inhaled dust is first subjected to large-area displacement contact and slow flow before reaching the separation filter core, the instantaneous concentrated impact of high-speed airflow on the separation filter core is effectively avoided, the swing power of the swing dust suction port during the dust removal process is utilized, the energy-saving property and the durability of the separation filter core are combined, and thus the problems that the energy-saving property and the durability are difficult to meet the long-term operation requirements of industry are solved.
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Description

Technical Field

[0001] This invention relates to the field of dust removal and filtration technology, and more specifically, to a dust removal structure and device based on an annular air duct and a swing-type suction port. Background Technology

[0002] In the field of air pollution control within the advanced environmental protection industry, this device is primarily used in industrial high-dust environments. The annular duct directs airflow for directional intake, reducing system resistance and energy consumption. The oscillating dust suction port dynamically expands the capture range, efficiently intercepting dust in its early stages of diffusion and preventing secondary dust re-entrainment.

[0003] When used in advanced environmental protection industries for air pollution control, the dust collection device with annular air duct and swing suction port can expand the collection range. However, the dust is directly impacted by the high-speed airflow, and the instantaneous impact force is concentrated and strong, which can easily lead to local deformation or even damage to the filter element. At the same time, the swing force of the swing suction port cannot be effectively converted into a large-area displacement contact force to buffer the impact energy of the dust. This results in high energy consumption of the dust collection system, shortened filter life, and difficulty in meeting the long-term operation requirements of industry in terms of energy saving and durability. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a dust removal structure based on an annular air duct and a swing-type dust suction port, including a filter box, wherein a separation filter element for filtering dust is installed inside the filter box. A protruding rod is provided on one side of the separator filter element, and the protruding rod is slidably connected to the filter box; Dust removal oscillating component, installed on the bottom end of the outer wall of the protruding rod; A contact element is installed at one end of a protruding rod, and the contact element is equipped with multiple contact strips and multiple external perforated plates. Multiple contact sleeves are disposed in the gaps formed by multiple outer perforated plates, and support members are installed on the contact sleeves.

[0005] The support member supports multiple contact sleeves to contact dust and impurities. The dust removal swing member drives the protruding rod to move back and forth. The protruding rod drives the contact member to move, so that the multiple contact strips move back and forth to contact dust and impurities. The contact element also drives the plurality of the outer perforated plates to reciprocate to contact dust and impurities.

[0006] In a preferred embodiment, the dust removal oscillating component includes: A linkage rod is fixedly installed on the bottom end of the outer wall of the protruding rod. A groove frame is installed on the outer wall of the linkage rod, and the linkage rod is used to slide along the inner wall of the groove frame. A linkage frame is fixedly installed at one end of the slot frame. A motor is installed on the lower surface of the linkage frame. The motor is used to drive the linkage frame to rotate. The outer wall of the motor is fixedly connected to the filter box. A ring pipe is fixedly installed on the upper surface of the linkage frame, and a flexible hose connects the ring pipe to the filter box.

[0007] In a preferred embodiment, the upper surface of the slot frame and the upper surface of the linkage frame are on the same horizontal plane, and a gap is provided between the slot frame and the filter box.

[0008] In a preferred embodiment, both the ring pipe and the filter box are fixedly connected to the hose, and the ring pipe is made of stainless steel.

[0009] In a preferred embodiment, the support member includes: A support rod is connected to the inner wall of the contact sleeve. One end of the support rod is connected to a hole sleeve. Both the hole sleeve and the contact sleeve are fixedly connected to the support rod. Multiple support rods are arranged in a circumferential distribution. A bracket is installed at one end of a support rod, and multiple support rods are fixedly connected to the bracket. A connecting rod is fixedly connected to one side of the outer wall of the bracket, and the connecting rod is fixedly connected to the filter box.

[0010] In a preferred embodiment, a gap is provided between the hole sleeve and the contact sleeve, and the outer wall diameter of the hole sleeve is smaller than the outer wall diameter of the contact sleeve.

[0011] In a preferred embodiment, the contact element includes: A baffle is fixedly installed at one end of a protruding rod, and multiple contact strips are fixedly connected to the baffle, with a gap between each two adjacent contact strips; A punching groove is formed at one end of the contact strip, and two side punching grooves are formed on both sides of the contact strip; A steel rope is fixedly connected to one side of the baffle and away from the contact strip. One end of the steel rope is connected to a counterweight. The counterweight is fixedly connected to the outer cover and is used to counterweight the outer cover. Multiple outer perforated plates are fixedly connected to the outer cover. A slip ring is fixedly installed on the outer wall of the outer cover. The outer wall of the slip ring is provided with an inner groove sleeve. The inner groove sleeve is fixedly connected to the filter box and is used to position the rotation of the slip ring.

[0012] In a preferred embodiment, the plurality of the counter-flush grooves are arranged in a circumferential distribution, and the inner walls of the counter-flush grooves and the side flush grooves are both smooth surfaces.

[0013] In a preferred embodiment, the counterweight has a trapezoidal cross-sectional shape, and the inner sleeve and the outer cover are rotatably connected.

[0014] The dust removal device also includes a negative pressure fan; A negative pressure fan is installed at one end of the filter box. A switch is installed on the outer wall of the filter box and on the side adjacent to the negative pressure fan. The switch is electrically connected to the negative pressure fan. The negative pressure fan is used to provide negative pressure power to the inside of the filter box.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention uses a dust removal oscillating component to drive a protruding rod to reciprocate, which in turn drives a contact strip to reciprocate. Simultaneously, the contact component drives an outer perforated plate to rotate, causing the sucked-in dust to first undergo a large-area displacement contact and slow flow before reaching the separation filter element. This effectively avoids the instantaneous concentrated impact of high-speed airflow on the separation filter element, preventing its deformation and damage, and significantly improving the durability of the separation filter element. At the same time, the oscillating force of the oscillating suction port itself during the dust removal process is directly converted into the power to drive the contact strip to reciprocate and the outer perforated plate to reciprocate. This eliminates the need for additional power equipment and the energy required for power equipment placement, achieving a large-area displacement and slow flow, reducing overall energy consumption, and combining energy efficiency with durability.

[0016] 2. The present invention uses connecting rods, brackets, and support rods to firmly support the contact sleeve and the perforated sleeve inside the filter box. Dust and impurities first pass through the perforated sleeve with a smaller outer diameter and then impact the contact sleeve with a larger outer diameter, realizing multi-stage contact slow flow at a fixed position. This effectively consumes the kinetic energy of the high-speed movement of dust, avoids the airflow directly impacting the separation filter element, and ensures the reliability of the slow flow component during long-term operation.

[0017] 3. This invention uses a convex rod to drive the baffle and contact strip to move back and forth, causing the flushing groove and side flushing groove to move back and forth in the gap between two adjacent contact sleeves, so as to dynamically contact and slow down the flow of dust. At the same time, the baffle cooperates with the counterweight through the steel rope, and uses the counterweight's own weight to drive the outer cover and outer perforated plate to rotate clockwise or counterclockwise, so as to achieve a large-area rotational contact and slow down the flow of overflowing dust, which greatly increases the dust contact area and buffer path, effectively reduces the impact kinetic energy of dust, and protects the separation filter element from damage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the dust removal structure based on the annular air duct and the oscillating dust suction port of the present invention.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the dust removal structure based on the annular air duct and the swing-type dust suction port of the present invention.

[0020] Figure 3 This is a partial structural diagram of the connection between the filter box and the hose of the present invention.

[0021] Figure 4 This is a schematic diagram of the main structure of the support member of the present invention.

[0022] Figure 5 This is a partial structural diagram of the cross-section of the connection between the inner sleeve and the filter box of the present invention.

[0023] Figure 6 This is a partial structural diagram of the countersink and sidesink of the present invention.

[0024] Figure 7 This is a schematic diagram of the vertical cross-sectional structure of the contact strip of the present invention.

[0025] Figure 8 This is a schematic diagram of the vertical cross-section of the dust removal structure based on the annular air duct and the swing-type dust suction port of the present invention.

[0026] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the middle.

[0027] The attached diagram is labeled as follows: 1. Filter box; 2. Separating filter element; 3. Protruding rod; 4. Contact sleeve; 5. Contact strip; 6. Outer perforated plate; 7. Linkage rod; 8. Slot frame; 9. Linkage bracket; 10. Motor; 11. Ring pipe; 12. Flexible hose; 13. Support rod; 14. Hole sleeve; 15. Bracket; 16. Connecting rod; 17. Baffle plate; 18. Counter-flush groove; 19. Side flush groove; 20. Steel rope; 21. Counterweight; 22. Outer cover; 23. Inner slot sleeve; 24. Slip ring; 25. Negative pressure fan; 26. Switch. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the figures. 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.

[0029] Example 1: When using this technology, such as Figure 1 - Figure 2 The dust removal structure shown includes a filter box 1, inside which a separation filter element 2 for filtering dust is installed; a protruding rod 3 is disposed on one side of the separation filter element 2, and the protruding rod 3 is slidably connected to the filter box 1; a dust removal swinging component is installed at the bottom of the outer wall of the protruding rod 3; a contact component is installed at one end of the protruding rod 3, and multiple contact strips 5 and multiple outer perforated plates 6 are installed on the contact component; and multiple contact sleeves 4 are disposed in the gaps formed by the multiple outer perforated plates 6, and a support component is installed on the contact sleeves 4.

[0030] The principle of this technology is to avoid air pollution. After dust and impurities are sucked into the filter box 1, multiple contact sleeves 4 are supported by a support member to contact the dust and impurities. The dust removal swing member drives the convex rod 3 to move back and forth, and the convex rod 3 drives the contact member to move, so that multiple contact strips 5 move back and forth to contact the dust and impurities. The contact member also drives multiple outer perforated plates 6 to rotate back and forth to contact the dust and impurities. A large amount of dust and impurities will be displaced and contacted slowly over a large area. After being slowly displaced, the dust and impurities are then contacted slowly through the separation filter element 2, avoiding impact deformation and damage to the separation filter element 2, and improving the durability of the separation filter element 2. At the same time, the swing force during the dust removal process is used to achieve large-area displacement and slow flow, which also makes the energy saving more excellent.

[0031] Example 2: This technical reference is as follows: Figure 2 - Figure 3 As shown, the dust removal oscillating component includes: a linkage rod 7, fixedly installed at the bottom of the outer wall of the protruding rod 3, with a groove frame 8 installed on the outer wall of the linkage rod 7, and the linkage rod 7 sliding along the inner wall of the groove frame 8; a linkage frame 9, fixedly installed at one end of the groove frame 8, with a motor 10 installed on the lower surface of the linkage frame 9, the motor 10 driving the linkage frame 9 to rotate, and the outer wall of the motor 10 being fixedly connected to the filter box 1; and an annular pipe 11, fixedly installed on the upper surface of the linkage frame 9, with a flexible hose 12 connecting the annular pipe 11 and the filter box 1. The upper surface of the groove frame 8 and the upper surface of the linkage frame 9 are at the same horizontal plane, and there is a gap between the groove frame 8 and the filter box 1. Both the annular pipe 11 and the filter box 1 are fixedly connected to the flexible hose 12, and the annular pipe 11 is made of stainless steel.

[0032] The principle of this technology is as follows: by starting the motor 10, the motor 10 drives the linkage frame 9 to rotate counterclockwise and then clockwise. The linkage frame 9 drives the slot frame 8 to rotate counterclockwise and then clockwise. The slot frame 8 drives the linkage rod 7 to move to the right and then to the left. At the same time, the linkage frame 9 drives the ring pipe 11 to rotate counterclockwise and then clockwise. The ring pipe 11 drives the right end of the hose 12 to rotate counterclockwise and then clockwise. In this way, the ring pipe 11 can form an annular air outlet. At the same time, the ring pipe 11 can reciprocate and suck in a large amount of dust and impurities. The dust and impurities in the air pollution will be sucked into the ring pipe 11 and then into the hose 12. They will then enter the filter box 1 through the hose 12. In this way, the force of the ring pipe 11's swing drives the protruding rod 3 to move back and forth.

[0033] Example 3: This technical reference is as follows: Figure 2 - Figure 9As shown, the support includes: a support rod 13 connected to the inner wall of the contact sleeve 4, with a perforated sleeve 14 connected to one end of the support rod 13. Both the perforated sleeve 14 and the contact sleeve 4 are fixedly connected to the support rod 13, and multiple support rods 13 are arranged in a circumferential distribution; a bracket 15 installed at one end of the support rod 13, with multiple support rods 13 fixedly connected to the bracket 15; and a connecting rod 16 fixedly connected to one side of the outer wall of the bracket 15, and fixedly connected to the filter box 1. A gap is provided between the perforated sleeve 14 and the contact sleeve 4, and the outer diameter of the perforated sleeve 14 is smaller than the outer diameter of the contact sleeve 4.

[0034] The principle of this technology is that the filter box 1 supports the connecting rod 16, the connecting rod 16 supports the bracket 15, the bracket 15 supports multiple support rods 13, the support rods 13 support the contact sleeves 4, and the support rods 13 support the hole sleeves 14. In this way, dust and impurities will impact the multiple contact sleeves 4 for buffering. Since the outer diameter of the hole sleeve 14 is smaller than the outer diameter of the contact sleeve 4, the dust and impurities pass through the hole sleeve 14 and then through the contact sleeves 4 for contact and slow flow, thus achieving contact and slow flow at a fixed position.

[0035] Example 4: This technical reference is as follows: Figure 5 - Figure 9 As shown, the contact components include: a baffle 17, fixedly installed at one end of the protruding rod 3, with multiple contact strips 5 fixedly connected to the baffle 17, and a gap between adjacent contact strips 5; a counter-punch groove 18, formed at one end of the contact strip 5, with two side punch grooves 19 formed on both sides of the contact strip 5; a steel rope 20, fixedly connected to one side of the baffle 17 away from the contact strip 5, with a counterweight 21 connected to one end of the steel rope 20, and the counterweight 21 fixedly connected to the outer cover 22, the counterweight 21 being used to counterweight the outer cover 22, and multiple outer perforated plates 6 fixedly connected to the outer cover 22; and a slip ring 24, fixedly installed on the outer wall of the outer cover 22, with an inner groove sleeve 23 on the outer wall of the slip ring 24, the inner groove sleeve 23 being fixedly connected to the filter box 1, and the inner groove sleeve 23 being used to position the slip ring 24 to rotate. The multiple counter-punch grooves 18 are arranged in a circumferential distribution, and the inner walls of the counter-punch grooves 18 and the side punch grooves 19 are smooth surfaces. The counterweight 21 has a trapezoidal cross-sectional shape, and the inner groove sleeve 23 is rotatably connected to the outer cover 22.

[0036] The principle of this technology is that the convex rod 3 drives the baffle 17 to move to the right and then to the left. The baffle 17 drives multiple contact strips 5 to move to the right and then to the left. The contact strips 5 drive the anti-flush groove 18 and the side flush groove 19 to move to the right and then to the left. The contact strips 5 are located in the gap between two adjacent contact sleeves 4 and move to the right and then to the left. Other dust and impurities are contacted and flow slowly in the multiple anti-flush grooves 18 and the multiple side flush grooves 19. In this way, the multiple contact strips 5 move back and forth to contact the dust and impurities and carry out the slow flow operation.

[0037] When the baffle 17 moves the steel cable 20 to the right and then to the left, and the steel cable 20 moves the counterweight 21 to the right, the steel cable 20 no longer pulls the counterweight 21. Under the weight of the counterweight 21 itself, the counterweight 21 drives the outer cover 22 to rotate clockwise. The outer cover 22 drives the slip ring 24 to rotate clockwise. The slip ring 24 rotates clockwise on the inner wall of the inner sleeve 23, and the filter box 1 supports the inner sleeve 23. In this way, the outer cover 22 drives multiple outer perforated plates 6 to rotate clockwise. The multiple outer perforated plates 6 rotate clockwise to contact and slow down the flow of dust and impurities overflowing from the outside. When the baffle 17 moves to the left, the baffle... 17 will cause the left end of the steel rope 20 to move to the left, the steel rope 20 pulls the counterweight 21, the counterweight 21 rotates counterclockwise, the counterweight 21 causes the outer cover 22 to rotate counterclockwise, the outer cover 22 causes the slip ring 24 to rotate counterclockwise, the slip ring 24 rotates counterclockwise along the inner wall of the inner groove sleeve 23, and at the same time the filter box 1 supports the inner groove sleeve 23. In this way, the outer cover 22 causes multiple outer perforated plates 6 to rotate counterclockwise, so that the multiple outer perforated plates 6 can rotate counterclockwise to contact and slow down the flow of dust and impurities overflowing from the outside, driving the multiple outer perforated plates 6 to rotate back and forth to contact the dust and impurities, thereby achieving a large-area slow flow operation.

[0038] Example 5: This technical reference is as follows: Figure 1 - Figure 2 As shown, the dust removal device also includes a negative pressure fan 25; a negative pressure fan 25 is installed at one end of the filter box 1, and a switch 26 is installed on the outer wall of the filter box 1 and on the side adjacent to the negative pressure fan 25. The switch 26 is electrically connected to the negative pressure fan 25, and the negative pressure fan 25 is used to provide negative pressure power to the inside of the filter box 1.

[0039] The principle of this technology is that the negative pressure fan 25 is started by the switch 26. The negative pressure fan 25 can create negative pressure air inside the ring pipe 11, which draws dust and impurities in the air into the hose 12 through the ring pipe 11 and into the filter box 1. After being filtered by the separation filter element 2, the air is discharged from the output end of the negative pressure fan 25, thus providing negative pressure power inside the filter box 1.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. 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 removal structure based on an annular air duct and a swing-type suction port, characterized in that: Includes a filter box (1), inside which a separation filter element (2) for filtering dust is installed; A protruding rod (3) is provided on one side of the separating filter element (2), and the protruding rod (3) is slidably connected to the filter box (1); The dust removal swing component is installed at the bottom of the outer wall of the protruding rod (3); A contact element is installed at one end of a protruding rod (3), and a plurality of contact strips (5) and a plurality of external perforated plates (6) are installed on the contact element. Multiple contact sleeves (4) are arranged in the gap formed by multiple outer holes (6), and a support is installed on the contact sleeves (4); The support member supports multiple contact sleeves (4) to contact dust and impurities. The dust removal swing member drives the protruding rod (3) to move back and forth. The protruding rod (3) drives the contact member to move, so that multiple contact strips (5) move back and forth to contact dust and impurities. The contact element also drives multiple of the outer perforated plates (6) to reciprocate to contact dust and impurities.

2. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 1, characterized in that: The dust removal oscillating component includes: Linkage rod (7) is fixedly installed on the bottom of the outer wall of protruding rod (3). A groove frame (8) is installed on the outer wall of the linkage rod (7). The linkage rod (7) is used to slide along the inner wall of the groove frame (8). A linkage frame (9) is fixedly installed at one end of the slot frame (8). A motor (10) is installed on the lower surface of the linkage frame (9). The motor (10) is used to drive the linkage frame (9) to rotate. The outer wall of the motor (10) is fixedly connected to the filter box (1). A ring pipe (11) is fixedly installed on the upper surface of the linkage frame (9), and a flexible hose (12) is connected between the ring pipe (11) and the filter box (1).

3. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 2, characterized in that: The upper surface of the slot frame (8) is at the same level as the upper surface of the linkage frame (9), and there is a gap between the slot frame (8) and the filter box (1).

4. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 3, characterized in that: The ring tube (11) and the filter box (1) are both fixedly connected to the hose (12), and the ring tube (11) is made of stainless steel.

5. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 4, characterized in that: The support member includes: A support rod (13) is connected to the inner wall of the contact sleeve (4). One end of the support rod (13) is connected to a hole sleeve (14). Both the hole sleeve (14) and the contact sleeve (4) are fixedly connected to the support rod (13). Multiple support rods (13) are arranged in a circumferential distribution. A bracket (15) is installed at one end of a support rod (13), and multiple support rods (13) are fixedly connected to the bracket (15); The connecting rod (16) is fixedly connected to one side of the outer wall of the bracket (15), and the connecting rod (16) is fixedly connected to the filter box (1).

6. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 5, characterized in that: A gap is provided between the hole sleeve (14) and the contact sleeve (4), and the outer wall diameter of the hole sleeve (14) is smaller than the outer wall diameter of the contact sleeve (4).

7. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 6, characterized in that: The contact element includes: A baffle (17) is fixedly installed at one end of a protruding rod (3). Multiple contact strips (5) are fixedly connected to the baffle (17), and a gap is provided between two adjacent contact strips (5). A punching groove (18) is formed at one end of the contact strip (5), and two side punching grooves (19) are formed on both sides of the contact strip (5). A steel rope (20) is fixedly connected to one side of the baffle (17) and away from the contact bar (5). One end of the steel rope (20) is connected to a counterweight (21). The counterweight (21) is fixedly connected to the outer cover (22). The counterweight (21) is used to counterweight the outer cover (22). Multiple outer perforated plates (6) are fixedly connected to the outer cover (22). The slip ring (24) is fixedly installed on the outer wall of the outer cover (22). The outer wall of the slip ring (24) is provided with an inner groove sleeve (23). The inner groove sleeve (23) is fixedly connected to the filter box (1). The inner groove sleeve (23) is used to position the slip ring (24) to rotate.

8. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 7, characterized in that: The multiple countersinks (18) are arranged in a circular distribution, and the inner walls of the countersinks (18) and the side countersinks (19) are smooth surfaces.

9. The dust removal structure based on an annular air duct and a swing-type suction port according to claim 8, characterized in that: The counterweight (21) has a trapezoidal cross-sectional shape, and the inner sleeve (23) and the outer cover (22) are rotatably connected.

10. Dust removal device, including: The dust removal structure as described in claim 9 further includes a negative pressure fan (25). A negative pressure fan (25) is connected to one end of the filter box (1). A switch (26) is installed on the outer wall of the filter box (1) and on the side adjacent to the negative pressure fan (25). The switch (26) is electrically connected to the negative pressure fan (25). The negative pressure fan (25) is used to provide negative pressure power to the inside of the filter box (1).