Dust control device

Abstract

The application provides a vortex dust control device, which comprises an air inlet cylinder, an air direction converter and a plurality of vortex air cylinders. One end of the air inlet cylinder is used for being connected with a press-in air cylinder in a fully-mechanized excavation face. The other end of the air inlet cylinder is connected with one end of the air direction converter. The air direction converter is used for changing an axial airflow entering the air inlet cylinder into a rotating airflow with a radial velocity. The plurality of vortex air cylinders are connected in sequence. One of the plurality of vortex air cylinders is connected with the other end of the air direction converter. The side wall of the vortex air cylinder is provided with an axial air outlet which is arranged through in the axial direction. The vortex dust control device further comprises an adjusting part arranged in the vortex air cylinder. The adjusting part is used for adjusting the opening width of the axial air outlet in the circumferential direction of the vortex air cylinder. By adopting the scheme, the problem that the adjusting angle of the air outlet of the vortex dust control device in the prior art is single, the opening and closing range is small, and a more flexible and applicable rotating air curtain cover cannot be formed can be solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel dust removal technology, and more specifically, to a vortex dust control device. Background Technology

[0002] With the increasing mechanization of coal mines, dust pollution at fully mechanized tunneling faces has become increasingly serious, not only affecting the visibility of operators but also posing a serious threat to safe production at fully mechanized tunneling faces.

[0003] Existing vortex dust control devices can form a rotating air curtain at the working face, surrounding the dust-laden airflow returning from the tunneling face and controlling the dust within a small area. However, the outlet adjustment angle of existing vortex dust control devices is singular, and the opening and closing range is small, which cannot form a more flexible and applicable rotating air curtain. Summary of the Invention

[0004] This invention provides a vortex dust control device to solve the problems of the single adjustment angle of the air outlet and the small opening and closing range of the vortex dust control device in the prior art.

[0005] This invention provides a vortex dust control device, including an air inlet duct, an air direction converter, and multiple vortex ducts. One end of the air inlet duct is connected to a pressurized air duct in the tunnel face, and the other end of the air inlet duct is connected to one end of the air direction converter. The air direction converter is used to change the axial airflow entering the air inlet duct into a rotating airflow with radial velocity. The multiple vortex ducts are connected in sequence, and one of the multiple vortex ducts is connected to the other end of the air direction converter. The sidewall of the vortex duct has an axial air outlet that extends through the axial direction. The vortex dust control device also includes an adjustment part disposed in the vortex duct, which is used to adjust the opening width of the axial air outlet in the circumference of the vortex duct.

[0006] Furthermore, the adjustment unit includes an adjustment baffle that extends along the axial air outlet. The adjustment baffle is movably disposed and changes the blocking area of ​​the axial air outlet by changing its position, thereby adjusting the opening width of the axial air outlet.

[0007] Furthermore, the adjustment unit also includes a rotating shaft, which is rotatably mounted on the vortex air duct and extends along the axial air outlet. An adjustment baffle is fixedly connected to the rotating shaft on one side in the width direction. When the rotating shaft rotates, it drives the adjustment baffle to swing, thereby adjusting the opening width of the axial air outlet.

[0008] Furthermore, the adjustment unit also includes a drive motor and a reducer. The drive motor is fixed to the side wall of the vortex fan, and the output end of the drive motor is connected to the input end of the reducer. The output end of the reducer is provided with a drive gear, and the rotating shaft is provided with a driven gear. The drive gear and the driven gear mesh to drive the rotating shaft to rotate.

[0009] Furthermore, there are two rotating shafts, which are respectively set on both sides of the axial air outlet in the width direction. There are also two adjusting baffles, which are respectively set on the two rotating shafts. When the two adjusting baffles swing, the sides of the two adjusting baffles away from the rotating shafts move closer to each other or further away from each other.

[0010] Furthermore, the adjusting baffle is an arc-shaped plate that bends circumferentially along the vortex air duct. The adjusting part also includes a limiting member fixed to the vortex air duct. The limiting member has an arc-shaped groove. One end of the adjusting baffle slides into the arc-shaped groove. The adjusting baffle adjusts the opening width of the axial air outlet by moving circumferentially along the vortex air duct.

[0011] Furthermore, the multiple vortex air ducts include a front vortex air duct and a rear vortex air duct. One end of the front vortex air duct is connected to the air direction converter, and the other end of the front vortex air duct is connected to the rear vortex air duct. The axial air outlets of the front vortex air duct and the axial air outlets of the rear vortex air duct are connected. Adjustment parts are respectively provided on the front vortex air duct and the rear vortex air duct, and different adjustment parts are controlled independently.

[0012] Furthermore, the inner diameter of the front vortex duct is larger than that of the rear vortex duct, and the length of the front vortex duct is smaller than that of the rear vortex duct.

[0013] Furthermore, the length of the front vortex duct is 2.5m to 4m, and the opening width of the axial air outlet of the front vortex duct is 0.04m to 0.06m; the length of the rear vortex duct is 5m to 7m, and the opening width of the axial air outlet of the rear vortex duct is 0.02m to 0.04m.

[0014] Furthermore, the wind direction converter includes a cylindrical shell, a rotating hub, and multiple blades. The two ends of the cylindrical shell are connected to the air inlet and the vortex air duct, respectively. The rotating hub is rotatably disposed inside the cylindrical shell. The rotating hub has a frustum-shaped structure. The end of the rotating hub with a smaller diameter faces the air inlet, and the end with a larger diameter faces the vortex air duct. Multiple blades are distributed along the circumference of the rotating hub on the outer wall of the rotating hub.

[0015] According to the technical solution of this invention, the vortex dust control device includes an air inlet duct, an air direction converter, and multiple vortex ducts. One end of the air inlet duct is directly connected to the forced-in air duct of the tunnel face, and the other end is tightly connected to one end of the air direction converter. The other end of the air direction converter is connected to one of the vortex ducts, and the air inlet duct, air direction converter, and multiple vortex ducts are all located on the same center line. The function of the air inlet duct is to receive the axial airflow from the forced-in air duct, providing a stable airflow source for subsequent air direction conversion and vortex generation. The air direction converter can change the axial airflow entering from the air inlet duct into a rotating airflow with radial velocity, increasing the airflow's diffusion capacity and dust entrainment capacity. Multiple vortex ducts are connected sequentially to form a continuous airflow channel, with one end of one vortex duct connected to the air direction converter to ensure the continuity and stability of the rotating airflow. Each vortex duct has an axially penetrating air outlet on its side wall, from which the rotating airflow can be blown out to form a dust control air curtain. The adjustment unit is used to adjust the opening width of the axial air outlet in the circumferential direction of the vortex fan, thereby controlling the air outlet speed and diffusion range. It can also change the circumferential width of the axial air outlet, thereby affecting the shape and intensity of the cyclone and achieving effective control of dust flow. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the vortex dust control device provided in an embodiment of the present invention is shown;

[0018] Figure 2 It shows Figure 1 Cross-sectional view at point AA;

[0019] Figure 3 A partial cross-sectional view of the wind direction converter is shown.

[0020] The above figures include the following reference numerals:

[0021] 10. Air inlet duct;

[0022] 20. Wind direction converter; 21. Cylindrical casing; 22. Rotating hub; 23. Blades;

[0023] 31. Front vortex ventilation duct;

[0024] 32. Rear vortex ventilation duct;

[0025] 40. Axial air outlet;

[0026] 50. Adjustment section;

[0027] 51. Adjust the baffle;

[0028] 52. Shaft;

[0029] 01. Pressurized ventilation duct. Detailed Implementation

[0030] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 and Figure 2 As shown, the present invention provides a vortex dust control device, including an air inlet duct 10, an air direction converter 20, and multiple vortex air ducts. One end of the air inlet duct 10 is connected to a pressurized air duct 01 in the tunnel face, and the other end of the air inlet duct 10 is connected to one end of the air direction converter 20. The air direction converter 20 is used to change the axial airflow entering the air inlet duct 10 into a rotating airflow with radial velocity. Multiple vortex air ducts are connected in sequence, and one of the multiple vortex air ducts is connected to the other end of the air direction converter 20. The side wall of the vortex air duct has an axial air outlet 40 that is axially through it. The vortex dust control device also includes an adjustment part 50 disposed in the vortex air duct, which is used to adjust the opening width of the axial air outlet 40 in the circumferential direction of the vortex air duct.

[0032] According to the technical solution of this invention, the vortex dust control device includes an air inlet duct 10, an air direction converter 20, and multiple vortex air ducts. One end of the air inlet duct 10 is directly connected to the forced-in air duct 01 of the tunnel face, and the other end is tightly connected to one end of the air direction converter 20. The other end of the air direction converter 20 is connected to one of the vortex air ducts, and the air inlet duct 10, the air direction converter 20, and the multiple vortex air ducts are all located on the same center line. The function of the air inlet duct 10 is to receive the axial airflow from the forced-in air duct 01, providing a stable airflow source for subsequent air direction conversion and vortex generation. The air direction converter 20 can change the axial airflow entering from the air inlet duct 10 into a rotating airflow with radial velocity, increasing the airflow diffusion capacity and dust entrainment capacity. The multiple vortex air ducts are connected sequentially to form a continuous airflow channel, with one end of one vortex air duct connected to the air direction converter 20 to ensure the continuity and stability of the rotating airflow. Each vortex blower has an axial outlet 40 extending through its side wall, allowing rotating airflow to be blown out to form a dust-controlling air curtain. An adjustment unit 50 is used to adjust the opening width of the axial outlet 40 in the circumferential direction of the vortex blower, thereby controlling the airflow speed and diffusion range. It can also change the circumferential width of the axial outlet 40, thus affecting the shape and intensity of the cyclone and achieving effective control of dust flow.

[0033] Furthermore, the adjustment unit 50 includes an adjustment baffle 51, which extends along the axial air outlet 40. The adjustment baffle 51 is movably disposed, and its position changes to alter the area of ​​obstruction of the axial air outlet 40, thereby adjusting the opening width of the axial air outlet 40. In this embodiment, the adjustment baffle 51 is elongated and rotatably disposed on both sides of the axial air outlet 40 in the width direction, specifically selected according to actual needs and the diameter of the vortex fan duct.

[0034] Furthermore, the adjustment unit 50 also includes a rotating shaft 52, which is rotatably disposed within the vortex air duct and extends along the axial air outlet 40. An adjusting baffle 51 is fixedly connected to the rotating shaft 52 on one side in the width direction. When the rotating shaft 52 rotates, it causes the adjusting baffle 51 to swing, thereby adjusting the opening width of the axial air outlet 40. In this embodiment, the adjustment unit 50 includes a rotating shaft 52, which is rotatably disposed inside the vortex air duct and extends along the axial air outlet 40. The rotating shaft 52 is symmetrically distributed within the vortex air duct to ensure the balance and stability of the adjusting baffle 51 connected to it during adjustment.

[0035] Specifically, when the rotating shaft 52 rotates under motor or manual operation, the adjusting baffle 51 will swing accordingly. The swing range and angle of the adjusting baffle 51 change according to the rotation angle of the rotating shaft 52, so that the opening width and coverage of the axial air outlet 40 can be precisely adjusted.

[0036] Furthermore, the adjustment unit 50 also includes a drive motor and a reducer. The drive motor is fixed to the side wall of the vortex fan, and the output end of the drive motor is connected to the input end of the reducer. The output end of the reducer is provided with a drive gear, and the rotating shaft 52 is provided with a driven gear. The drive gear and the driven gear mesh to drive the rotating shaft 52 to rotate.

[0037] In this embodiment, the adjustment unit 50 includes a drive motor and a reducer. The drive motor is mounted on the side wall of the vortex fan, and its output end is connected to the input end of the reducer. The reducer lowers the motor's speed and increases torque, thus controlling the rotation of the shaft 52 more smoothly and powerfully. The output end of the reducer is equipped with a drive gear, which meshes with a driven gear fixed to the shaft 52. Through gear transmission, the rotation of the drive gear precisely drives the shaft 52, thereby controlling the opening and closing of the adjustment baffle 51 mounted on the shaft 52. This allows for adjustment of the gap at the longitudinal air outlet of the vortex fan, achieving dynamic balance of the entire device.

[0038] Furthermore, there are two rotating shafts 52, which are respectively located on both sides of the axial air outlet 40 in the width direction. There are also two adjusting baffles 51, which are respectively located on the two rotating shafts 52. When the two adjusting baffles 51 swing, the sides of the two adjusting baffles 51 that are away from the rotating shafts 52 move closer to each other or further away from each other.

[0039] Furthermore, the rotating shaft 52 can automatically adjust its rotation angle based on the operating frequency of the vortex fan and the real-time wind speed sensor feedback from the tunnel. When the system detects a high fan frequency or uneven wind speed in the tunnel, the drive motor will adjust the rotating shaft 52, bringing the sides of the two adjusting baffles 51 furthest from the rotating shaft 52 closer together, reducing the width of the axial outlet 40, thereby increasing the wind speed and pressure of the outlet air, making the airflow more concentrated, and improving dust control efficiency. Conversely, when the system detects a low fan frequency or relatively uniform wind speed in the tunnel, the drive motor will adjust the rotating shaft 52, moving the sides of the two adjusting baffles 51 furthest from the rotating shaft 52 further apart, increasing the width of the axial outlet 40, thereby reducing the wind speed and pressure of the outlet air, to adapt to different working conditions and maintain dust control effectiveness.

[0040] In one embodiment (not shown), the adjusting baffle 51 is an arc-shaped plate that bends circumferentially along the vortex air duct. The adjusting part 50 also includes a limiting member fixed to the vortex air duct. The limiting member has an arc-shaped groove. One end of the adjusting baffle 51 is slidably engaged with the arc-shaped groove. The adjusting baffle 51 adjusts the opening width of the axial air outlet 40 by moving circumferentially along the vortex air duct.

[0041] In this embodiment, the adjusting baffle 51 can be an arc-shaped plate, resulting in less resistance and less airflow loss during air outlet. The adjusting part 50 is also equipped with a limiting member fixed to the vortex fan duct. The limiting member has a specific arc-shaped groove that forms a sliding fit with one end of the adjusting baffle 51. With the above structure, the adjusting baffle 51 can move in the circumferential direction of the vortex fan duct, instead of adjusting its axial position by rotating the shaft 52.

[0042] Furthermore, the multiple vortex ducts include a front vortex duct 31 and a rear vortex duct 32. One end of the front vortex duct 31 is connected to the air direction converter 20, and the other end of the front vortex duct 31 is connected to the rear vortex duct 32. The axial air outlet 40 of the front vortex duct 31 and the axial air outlet 40 of the rear vortex duct 32 are connected. The front vortex duct 31 and the rear vortex duct 32 are respectively provided with adjustment parts 50, and different adjustment parts 50 are controlled individually.

[0043] In this embodiment, the front vortex duct 31 has a larger diameter to increase the initial diffusion of airflow and velocity. One end of the front vortex duct 31 is tightly connected to the wind direction converter 20, receiving the rotating airflow output from the wind direction converter 20. The axial outlet 40 of the front vortex duct 31 is connected to the axial outlet 40 of the rear vortex duct 32 to ensure the continuity and guidance of the airflow. The diameter of the rear vortex duct 32 is smaller than that of the front vortex duct to facilitate further focusing and guidance of the airflow and avoid airflow velocity attenuation. The front vortex duct 31 and the rear vortex duct 32 are each provided with an independent adjustment part 50, and the width of the axial outlet 40 of the front vortex duct 31 and the rear vortex duct 32 can be adjusted according to actual needs.

[0044] Furthermore, the inner diameter of the front vortex duct 31 is larger than that of the rear vortex duct 32, while the length of the front vortex duct 31 is shorter than that of the rear vortex duct 32. In this embodiment, the larger inner diameter of the front vortex duct 31 provides sufficient space for the incoming airflow to form vortices over a wider radial range, thereby generating stronger entrainment and mixing capabilities, which helps to capture and control dust more extensively. The relatively smaller length of the front vortex duct 31 ensures that the airflow has formed a relatively stable and uniform rotating airflow structure before entering the rear duct. The relatively smaller inner diameter of the rear vortex duct 32 helps to reduce wind resistance, allowing the airflow to pass through more efficiently and smoothly during rotation. At the same time, due to the longer length of the rear vortex duct 32, there is sufficient space and time for the wind force to attenuate slowly and remain within a certain range, avoiding a decrease in dust control efficiency caused by a rapid drop in wind force.

[0045] Furthermore, the length of the front vortex duct 31 is 2.5m to 4m, and the opening width of the axial air outlet 40 of the front vortex duct 31 is 0.04m to 0.06m; the length of the rear vortex duct 32 is 5m to 7m, and the opening width of the axial air outlet 40 of the rear vortex duct 32 is 0.02m to 0.04m.

[0046] In this embodiment, the length of the front vortex duct 31 is designed to be 2.5 meters to 4 meters. This length is chosen because the front vortex duct 31 needs to receive rotating airflow from the airflow converter 20 and rapidly diffuse and stabilize the airflow within a short distance to form a uniform radial jet, thereby effectively controlling dust in the front area. The axial outlet 40 of the front vortex duct 31 has an opening width of 0.04 meters to 0.06 meters, ensuring that the rotating airflow is discharged uniformly and stably from the duct, avoiding excessive concentration or insufficient diffusion of the airflow, which would affect the capture and control of dust particles. The length of the rear vortex duct 32 is designed to be 5 meters to 7 meters. Compared to the front vortex duct 31, the rear duct is longer to further optimize the airflow distribution in the tunnel, while utilizing the longer path to attenuate the rotational speed of the airflow, allowing the airflow to more evenly cover the entire tunnel cross-section. The axial outlet 40 of the rear vortex duct 32 has an opening width of 0.02 meters to 0.04 meters, which can generate a more focused and moderately fast vortex in the rear area of ​​the roadway, effectively capturing the dust that the front vortex duct 31 failed to control, while avoiding excessive airflow impacting the roadway wall and causing secondary dust.

[0047] like Figure 3 As shown, the wind direction converter 20 includes a cylindrical shell 21, a rotating hub 22, and multiple blades 23. The two ends of the cylindrical shell 21 are connected to the air inlet duct 10 and the vortex air duct, respectively. The rotating hub 22 is rotatably disposed inside the cylindrical shell 21. The rotating hub 22 has a frustum-shaped structure. The end of the rotating hub 22 with a smaller diameter faces the air inlet duct 10, and the end of the rotating hub 22 with a larger diameter faces the vortex air duct. Multiple blades 23 are distributed along the circumference of the rotating hub 22 on the outer wall of the rotating hub 22.

[0048] In this embodiment, the wind direction converter 20 consists of a cylindrical outer shell 21, a rotating hub 22, and multiple blades 23. The cylindrical outer shell 21 is cylindrical, with its two ends connected to the air inlet duct 10 and the vortex air duct, respectively. The rotating hub 22 is frustoconical, a structure that guides the airflow from axial to radial direction while increasing the rotational speed of the airflow. The smaller diameter end of the rotating hub 22 faces the air inlet duct 10, facilitating the smooth entry of axial airflow, while the larger diameter end faces the vortex air duct, ensuring a smooth transition of the rotating airflow into the vortex air duct. Multiple blades 23 are evenly distributed on the outer wall of the rotating hub 22, forming a circumferential array around the rotating hub 22. The shape of the blades 23 is typically airfoil-shaped, and can be either straight or curved. The specific shape needs to be optimized according to the principles of aerodynamics to maximize the rotational speed of the airflow and minimize airflow resistance.

[0049] Specifically, when the axial airflow enters the airflow converter 20 through the air inlet duct 10, the airflow first contacts the smaller diameter end of the rotating hub 22. At this time, the rotating hub 22 rotates at high speed under the action of the motor, and its frustum-shaped structure guides the airflow to the larger diameter end. At the same time, under the action of the blades 23, the airflow generates rotational motion, ultimately forming a rotating airflow with radial velocity. The rotating airflow then enters the vortex fan duct, beginning its dust control process in the tunnel.

[0050] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0053] In the description of this solution, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this solution and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this solution. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this solution.

Claims

1. A vortex dust control device, characterized in that, The device includes an air inlet duct (10), a wind direction converter (20), and multiple vortex air ducts. One end of the air inlet duct (10) is connected to a pressurized air duct (01) in the tunnel face, and the other end of the air inlet duct (10) is connected to one end of the wind direction converter (20). The wind direction converter (20) is used to change the axial airflow entering the air inlet duct (10) into a rotating airflow with radial velocity. Multiple vortex air ducts are connected in sequence, and one of the multiple vortex air ducts is connected to the other end of the wind direction converter (20). The side wall of the vortex air duct has an axial air outlet (40) that is axially through it. The vortex dust control device also includes an adjustment part (50) disposed on the vortex air duct. The adjustment part (50) is used to adjust the opening width of the axial air outlet (40) in the circumferential direction of the vortex air duct. The adjustment unit (50) includes an adjustment baffle (51) extending along the axial air outlet (40). The adjustment baffle (51) is movably disposed, and the adjustment baffle (51) changes its position to change the blocking area of ​​the axial air outlet (40), thereby adjusting the opening width of the axial air outlet (40). The adjustment unit (50) also includes a rotating shaft (52) rotatably disposed on the vortex fan duct, extending along the axial air outlet (40). The adjustment baffle (51) is located in the width direction. The side is fixedly connected to the rotating shaft (52). When the rotating shaft (52) rotates, it drives the adjusting baffle (51) to swing, so as to adjust the opening width of the axial air outlet (40). There are two rotating shafts (52), which are respectively set on both sides of the axial air outlet (40) in the width direction. There are two adjusting baffles (51), which are respectively set on the two rotating shafts (52). When the two adjusting baffles (51) swing, the side of the two adjusting baffles (51) away from the rotating shaft (52) moves closer to each other or away from each other.

2. The vortex dust control device according to claim 1, characterized in that, The adjustment unit (50) also includes a drive motor and a reducer. The drive motor is fixed to the side wall of the vortex fan. The output end of the drive motor is connected to the input end of the reducer. The output end of the reducer is provided with a drive gear. The rotating shaft (52) is provided with a driven gear. The drive gear and the driven gear mesh to drive the rotating shaft (52) to rotate.

3. The vortex dust control device according to claim 1, characterized in that, The adjusting baffle (51) is an arc-shaped plate that bends along the circumference of the vortex air duct. The adjusting part (50) also includes a limiting member fixed to the vortex air duct. The limiting member has an arc-shaped groove. One end of the adjusting baffle (51) is slidably engaged with the arc-shaped groove. The adjusting baffle (51) adjusts the opening width of the axial air outlet (40) by moving along the circumference of the vortex air duct.

4. The vortex dust control device according to claim 1, characterized in that, The plurality of vortex ducts include a front vortex duct (31) and a rear vortex duct (32). One end of the front vortex duct (31) is connected to the wind direction converter (20), and the other end of the front vortex duct (31) is connected to the rear vortex duct (32). The axial air outlet (40) of the front vortex duct (31) and the axial air outlet (40) of the rear vortex duct (32) are connected. The front vortex duct (31) and the rear vortex duct (32) are respectively provided with adjustment parts (50), and different adjustment parts (50) are controlled individually.

5. The vortex dust control device according to claim 4, characterized in that, The inner diameter of the front vortex duct (31) is larger than the inner diameter of the rear vortex duct (32), and the length of the front vortex duct (31) is smaller than the length of the rear vortex duct (32).

6. The vortex dust control device according to claim 5, characterized in that, The length of the front vortex duct (31) is 2.5m to 4m, and the opening width of the axial air outlet (40) of the front vortex duct (31) is 0.04m to 0.06m; the length of the rear vortex duct (32) is 5m to 7m, and the opening width of the axial air outlet (40) of the rear vortex duct (32) is 0.02m to 0.04m.

7. The vortex dust control device according to claim 1, characterized in that, The wind direction converter (20) includes a cylindrical shell (21), a rotating hub (22), and multiple blades (23). The two ends of the cylindrical shell (21) are connected to the air inlet (10) and the vortex air duct, respectively. The rotating hub (22) is rotatably disposed inside the cylindrical shell (21). The rotating hub (22) has a frustum-shaped structure. The end of the rotating hub (22) with a smaller diameter faces the air inlet (10), and the end of the rotating hub (22) with a larger diameter faces the vortex air duct. Multiple blades (23) are distributed along the circumference of the rotating hub (22) on the outer wall of the rotating hub (22).

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