Dust falling device for metal ore mining construction

Abstract

The application discloses a dust falling device for metal mine exploitation construction, which comprises a spray head body, wherein the spray head body comprises: a shell, which is provided with a spray hole at one end and an inlet hole at one side; a gear sealing plate, which is movably installed at the end of the shell far from the spray hole; a driving assembly, which is arranged in the shell and is installed at the inner side wall of the gear sealing plate at one end; a control assembly, which is arranged in the shell and is movably penetrated by the air pipe at one end and reaches the center of the driving assembly and the gear sealing plate; a cyclone device, which is arranged in the shell, is sleeved with the control assembly at the outer side, and is in transmission connection with the driving assembly; the driving assembly is used for driving the cyclone device to expand or contract; the gear sealing plate is used for driving the cyclone device to rotate as a whole when rotating; and the control assembly is used for introducing gas to make the cyclone device expand outward when the cyclone device expands outward, so as to abut against the inner wall of the shell. The application can adjust the cyclone angle and the atomization intensity, and can also realize the cleaning of the inner wall of the cavity without disassembling the spray head.

Description

Technical Field

[0001] This invention relates to the field of dust suppression technology in mining, and in particular to a dust suppression device for metal mining operations. Background Technology

[0002] A large amount of dust is generated during metal mining, tunneling and transportation operations. In order to effectively reduce dust concentration and improve the working environment, dust suppression treatment is carried out. At present, dust suppression in mines mostly uses spray nozzles, which use internal swirling structures to atomize water flow into swirling streams, thereby achieving dust adsorption and sedimentation.

[0003] However, existing swirl nozzles generally have the following drawbacks: 1. Swirl cores and inclined troughs are mostly fixed integrated structures, and the swirling angle and atomization intensity are not adjustable, making it difficult to adapt to the dust suppression requirements under different mining faces and different air volumes; 2. After the nozzle stops, the pressure in the pipeline drops suddenly, which can easily create negative pressure. External dust and coal dust can be drawn back into the vortex cavity and adhere to the inner wall of the cavity, causing blockage. After blockage, the internal space of the nozzle is small and the structure is closed, making it difficult to clean. It can only be disassembled or replaced as a whole, which results in high maintenance costs and affects continuous operation. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a dust suppression device for metal mining construction, which can adjust the swirl angle and atomization intensity to adapt to the dust suppression needs of different mining faces and different air volumes, and achieve the cleaning of the inner wall of the cavity without disassembling the nozzle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dust suppression device for metal mining operations includes a nozzle body, the nozzle body comprising: The shell has a spray hole at one end and a water inlet on one side; A gear sealing plate is movably mounted on the housing at one end away from the nozzle. The drive assembly is located inside the housing, with one end mounted on the inner sidewall of the gear sealing plate; The control component is located inside the housing, and the air tube at one end of it moves sequentially through the center of the drive component and the gear sealing plate. A swirling device is located inside the housing, sleeved on the outside of the control assembly, and is connected to the drive assembly for transmission. The driving assembly is used to drive the swirling device to expand or contract; the gear sealing plate is used to drive the swirling device to rotate as a whole via the driving assembly when rotating; the regulating assembly is used to introduce gas when the swirling device expands outward so that the swirling device can further expand outward and abut against the inner wall of the housing.

[0006] Furthermore, the swirling device includes multiple sets of swirling components evenly arranged in a ring; each set of swirling components includes an arc-shaped swirling element, side sealing plates and connecting rods respectively disposed at both ends of the swirling element, and a toggle rod provided at the other end of the connecting rod; slots are opened on both sides of the swirling element, and inclined grooves for forming swirls are opened on the outer side wall; an airbag-type elastic element is provided between adjacent swirling elements, and the two sides of the elastic element are fixedly connected to the slots of the adjacent swirling elements, and the open end of the elastic element is fixed to the venting groove on the outer side wall of the control component, and the connection is sealed; sealing gaskets are provided on both sides of the swirling element and the side sealing plate.

[0007] Furthermore, the control assembly includes a control cylinder, an air tube, and multiple sets of limiting rods; one end of the air tube is connected to the control cylinder, and the other end sequentially passes through the center of the drive assembly and the gear sealing plate; the limiting rods are evenly distributed at one end of the control cylinder near the gear sealing plate, and limiting grooves are formed inside, with each connecting rod movably engaged in the corresponding limiting groove; the control cylinder has a ventilation cavity at its center, which is connected to the air tube; multiple sets of ventilation grooves are evenly distributed on the side wall of the control cylinder, and the two ends of each set of ventilation grooves are respectively connected to the elastic element and the ventilation cavity to form a sealing structure.

[0008] Furthermore, the drive assembly includes a rotating rod, a driving gear, a bushing, and a driven gear; the driven gear is movably sleeved on the outside of the trachea through the bushing and installed on the inner sidewall of the gear sealing plate; one end of the rotating rod is connected to the driving gear, and the other end passes through and extends out of the gear sealing plate; the driving gear meshes with the driven gear; the driven gear has multiple sets of arc-shaped grooves, and each actuating rod moves through the corresponding arc-shaped groove.

[0009] Furthermore, the end of the rotating rod extending out of the gear sealing plate is provided with a drive groove and a fixing bolt; or, the end of the rotating rod extending out of the gear sealing plate is connected to the first motor through a transmission assembly.

[0010] Furthermore, the gear sealing plate has teeth on its outer side for meshing and transmission with an external gear.

[0011] Furthermore, the device includes multiple nozzle bodies, the outer sides of which of the multiple nozzle bodies have gear sealing plates that are meshed with gear rings with internal gear teeth.

[0012] Furthermore, the external gear or gear ring is connected to the second motor drive.

[0013] Furthermore, a sealing sleeve is installed on one side of the gear sealing plate inside the housing, and the swirling device is sleeved on the outside of the sealing sleeve.

[0014] Furthermore, the housing is provided with a vortex cavity, a throat, and a nozzle, and the drive assembly, swirling device, and control assembly are all located within the vortex cavity.

[0015] This invention proposes a dust suppression device for metal mining operations, which has the following beneficial effects: (1) By rotating the gear sealing plate, the vortex device is driven to rotate synchronously, so that the relative angle of the inclined groove on the vortex device with respect to the water inlet hole fixed on the shell changes, thereby changing the tangential incident angle of the water flow entering the vortex cavity along the inclined groove; when the inclined groove is aligned with the water inlet direction, the tangential component of the water flow increases, the vortex intensity increases, and a stronger centrifugal force is formed, making the sprayed water flow atomized more fine, the atomization diffusion angle larger, and the effective range shorter; when the inclined groove is deflected from the water inlet direction, the tangential component of the water flow decreases, the vortex intensity decreases, and the axial kinetic energy of the water flow increases, making the sprayed water flow atomized particles larger, the atomization diffusion angle smaller, and the spray range longer. Therefore, the spray state can be adjusted in real time according to the dust concentration, ventilation volume and dust suppression range requirements on site to improve dust suppression adaptability. (2) When the machine is stopped, it can be filled with air through the control component by an external air source, so that the vortex device expands and fits the inner wall of the vortex cavity of the shell. With the rotation, the inner wall is scraped and cleaned to remove scale and deposited dust, extend the service life of the nozzle, and the on-site maintenance is simple and the cost is reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view structural schematic diagram of a dust suppression device for metal mining construction provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a dust suppression device for metal mining construction provided in an embodiment of the present invention from a second perspective. Figure 3 This is a cross-sectional view of a dust suppression device for metal mining operations provided in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the driving component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the swirl assembly provided in an embodiment of the present invention from a first-view perspective; Figure 6 This is a cross-sectional view of the swirl assembly provided in an embodiment of the present invention; Figure 7This is a schematic diagram of the swirl assembly provided in an embodiment of the present invention from a second perspective. Figure 8 This is a schematic diagram of the structure of the control component provided in an embodiment of the present invention; Figure 9 This is a cross-sectional view of the control component provided in an embodiment of the present invention.

[0018] In the diagram: 1. Nozzle body, 2. Housing, 3. Gear sealing plate, 4. Drive assembly, 5. Swirl device, 6. Control assembly, 7. Swirl assembly, 8. Swirl component, 9. Side sealing plate, 10. Connecting rod, 11. Slot, 12. Inclined slot, 13. Actuating rod, 14. Elastic component, 15. Control cylinder, 16. Air pipe, 17. Limiting rod, 18. Ventilation chamber, 19. Ventilation groove, 20. Bottom of control cylinder, 21. Rotating rod, 22. Drive gear, 23. Bushing, 24. Driven gear, 25. Arc groove, 26. Swirl chamber, 27. Throat, 28. Nozzle, 29. Water inlet, 30. Limiting groove, 31. Sealing sleeve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "center," "longitudinal," "lateral," "vertical," and "horizontal," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. When an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present.

[0021] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or order. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.

[0022] like Figures 1-9As shown, this embodiment of the invention provides a dust suppression device for metal mining operations, including a nozzle body 1, wherein the nozzle body 1 includes: The housing 2 has a spray hole 28 at one end and a water inlet hole 29 at an angle on one side. The gear sealing plate 3 is movably mounted on the housing 2 at one end away from the nozzle 28; The drive assembly 4 is located inside the housing 2, with one end mounted on the inner sidewall of the gear sealing plate 3. The control component 6 is located inside the housing 2, and the air pipe 16 at one end of it moves through the center of the drive component 4 and the gear sealing plate 3 in sequence. The swirling device 5 is located inside the housing 2, sleeved on the outside of the control component 6, and is connected to the drive component 4 in a transmission manner. The driving component 4 is used to drive the swirling device 5 to expand or contract; the gear sealing plate 3 is used to drive the swirling device 5 to rotate as a whole via the driving component 4 when rotating; the regulating component 6 is used to introduce gas when the swirling device 5 expands outward so that the swirling device 5 can further expand outward and abut against the inner wall of the housing 2.

[0023] like Figures 4 to 7 As shown, in this embodiment, the swirling device 5 includes multiple sets of swirling components 7 evenly arranged in a ring. Each set of swirling components 7 includes an arc-shaped swirling element 8, side sealing plates 9 and connecting rods 10 respectively disposed at both ends of the swirling element, and a toggle rod 13 provided at the other end of the connecting rod 10. The two side walls of the swirling element 8 are provided with slots 11, and the outer side wall is provided with inclined grooves 12 for forming swirling currents. An airbag-type elastic element 14 is provided between adjacent swirling elements 8. The two sides of the elastic element 14 are fixedly connected to the slots 11 of the adjacent swirling elements 8, and the open end of the elastic element 14 is fixed to the venting groove 19 on the outer side wall of the regulating component 6, and the connection is sealed. Sealing gaskets are provided on both sides of the swirling element 8 and the side sealing plates 9. When the multiple sets of swirling elements 8 are closed, they form a ring-shaped sealing structure. When they are unfolded, they expand outward and stretch the elastic element 14, and the internal space increases as the elastic element 14 unfolds.

[0024] like Figure 8 , Figure 9As shown, in this embodiment, the control component 6 includes a control cylinder 15, an air pipe 16, and multiple sets of limiting rods 17; one end of the air pipe 16 is connected to the control cylinder 15, and the other end sequentially passes through the center of the drive component 4 and the gear sealing plate 3; the limiting rods 17 are evenly radially arranged at one end of the control cylinder 15 near the gear sealing plate 3, and each limiting rod 17 has a limiting groove 30 inside; the control cylinder 15 has a ventilation cavity 18 at its center, which is connected to the air pipe 16; multiple sets of ventilation grooves 19 are also evenly arranged on the side wall of the control cylinder 15, and the two ends of each set of ventilation grooves 19 are respectively connected to the opening end of the elastic element 14 and the ventilation cavity 18; each connecting rod 10 is movably engaged in the corresponding limiting groove 30, and the control cylinder 15 is made of lightweight material and is supported by the air pipe 16.

[0025] The external ventilation device supplies air to the ventilation chamber 18 through the air pipe 16, causing the elastic element 14 to expand. The expanded elastic element 14 then adheres to the inner wall of the vortex chamber 26 of the shell. The overall vortex device then cleans the chamber, and after cleaning, the air is exhausted through the air pipe 16.

[0026] In some optional embodiments, a solenoid valve may be installed at the bottom 20 of the control cylinder (the end of the control cylinder away from the air pipe 16). The solenoid valve is powered and controlled externally through a circuit. After cleaning is completed, the solenoid valve is opened to discharge the gas in the ventilation chamber 18 and the elastic element 14, and to complete the purging of the nozzle 28 of the housing 2.

[0027] like Figure 3 , Figure 4 As shown, the drive assembly 4 includes a rotating rod 21, a driving gear 22, a bushing 23, and a driven gear 24. The driven gear 24 is movably sleeved on the outside of the air pipe 16 through the bushing 23 and installed on the inner side wall of the gear sealing plate 3. One end of the rotating rod 21 is connected to the driving gear 22, and the other end passes through and extends out of the gear sealing plate 3. The driving gear 22 meshes with the driven gear 24. The driven gear 24 has multiple sets of arc-shaped grooves 25, and each of the actuating rods 13 moves through the corresponding arc-shaped grooves 25. When the rotating rod 21 rotates, the driven gear 24 drives the arc-shaped grooves 25 to drive the actuating rods 13, causing the vortex assembly 7 to expand or contract.

[0028] In some embodiments, the end of the rotating rod 21 extending out of the gear sealing plate 3 has a driving groove and a fixing bolt (not shown). The driving groove can be a slotted groove, a cross groove, or a polygonal groove, etc. When it is not necessary to expand or retract the vortex assembly 7, the fixing bolt is screwed to the end of the rotating rod 21 extending out of the gear sealing plate 3 to form a fixation. When it is necessary to expand or retract the vortex assembly 7, the fixing bolt is removed, and the rotating rod 21 is driven to rotate clockwise or counterclockwise by an external tool to expand or retract the vortex assembly 7.

[0029] It should be noted that the air circuit is closed when the water circuit is working; the water circuit is shut down when the air circuit is being cleaned, and the water and air circuits work separately without interfering with each other. When the water circuit is used for dust suppression, the vortex component 8 is in a sealed state. When the air circuit is used for cleaning and unblocking, the nozzle does not perform dust suppression.

[0030] When the swirling device 5 needs to be unfolded to clean the inside of the nozzle, the nozzle body 1 is disassembled. After removing the fixing bolts that secure the outside of the rotating rod 21, an external tool is inserted into the drive groove to rotate the rotating rod 21. The rotation of the rotating rod 21 drives the drive gear 22 to rotate, which in turn drives the driven gear 24 to rotate. The driven gear 24 drives the arc-shaped groove 25 to rotate. When the arc-shaped groove 25 rotates, it can drive the actuating rod 13. Under the actuation of the arc-shaped groove 25, the actuating rod 13 carries the connecting rod 10 along the limit. The slot 30 moves outward, and the connecting rod 10 drives the vortex member 8 to expand outward. After the elastic member 14 expands, the external ventilation device is connected to the air pipe 16, and gas is introduced into the ventilation chamber 18 through the air pipe 16. The gas in the ventilation chamber 18 enters the elastic member 14, causing the elastic member 14 to bulge. The elastic member 14 fits against the inner wall of the vortex chamber 26 of the housing 2. Then, when the gear sealing plate 3 is driven to rotate, causing the entire device on it to rotate, the expanded elastic member 14 can clean the vortex chamber 26 and prevent impurities from accumulating. After cleaning, the external ventilation device is disconnected, and the gas is vented through the air pipe 16. Then, when the water circuit is working, it is flushed by high-pressure water flow; or, when a solenoid valve is installed, after cleaning, the gas is discharged through the solenoid valve to unclog the nozzle 28.

[0031] In some other embodiments, the end of the rotating rod 21 extending from the gear sealing plate 3 can be connected to the first motor (not shown) via a transmission assembly (not shown). The transmission assembly can be a gear drive or a belt drive, etc., and the expansion or contraction of the vortex assembly 7 can be achieved by controlling the forward and reverse rotation of the first motor. This method enables automated control and online cleaning without disassembling the nozzle body 1.

[0032] In this embodiment, the gear sealing plate 3 is provided with a sealing sleeve 31 on one side inside the housing 2, and the swirling element 8 is sleeved on the outside of the sealing sleeve 31. When the swirling element 8 is in a retracted state, the inner side wall of one end is attached to the outer side wall of the sealing sleeve 31, and the sealing sleeve 31 seals the attached part of the swirling element 8.

[0033] In specific implementation, the gear sealing plate 3 has teeth (not shown) on its outer side, which can mesh with an external gear for transmission. An external second motor (not shown) can drive the gear sealing plate 3 to rotate via the external gear. The gear sealing plate 3 drives the swirling device 5 to rotate as a whole, adjusting the position of the inclined groove 12 and the water inlet hole 29. When multiple sets of nozzle bodies 1 are used in combination, the outer sides of multiple gear sealing plates 3 can also mesh with gear rings with internal teeth. The second motor drives the gear rings to rotate via the gears, driving the gear sealing plates 3 on multiple sets of nozzle bodies 1 to rotate. Each gear sealing plate 3 drives the corresponding swirling device 5 to rotate as a whole, adjusting the relative angle between the inclined groove 12 and the water inlet hole 29 on the housing 2.

[0034] The housing 2 is provided with a vortex cavity 26, a throat 27 and a nozzle 28. The drive assembly 4, the swirling assembly 7 and the control assembly 6 are all located in the vortex cavity 26. The lower end of the housing 2 is inclinedly installed with a water inlet 29, and water flows into the vortex cavity 26 through the water inlet 29.

[0035] The specific usage is as follows:

[0036] (1) Normal use for dust suppression spraying: The water inlet 29 is connected to a high-pressure water source, the water path is open, and the air path is kept sealed. The water flows into the vortex chamber 26 through the water inlet 29, forms a vortex along the inclined groove 12 on the outside of the vortex component 8, and is atomized and sprayed out through the throat 27 and the nozzle 28. When it is necessary to adjust the atomization effect, the gear sealing plate 3 is rotated by a motor or gear, which drives the internal vortex device 5 to rotate synchronously, changing the relative angle between the inclined groove 12 and the water inlet 29, so as to realize the adjustment of the vortex intensity and the spray angle.

[0037] (2) Shutdown cleaning and anti-clogging use: First, shut off the water supply or disassemble the nozzle to ensure there is no high-pressure water inside. Loosen the fixing bolts on the outside of the rotating rod 21, and use a tool to insert into the drive groove to rotate the rotating rod 21. Drive the actuating rod 13 through the driving gear 22, driven gear 24, and arc groove 25, so that the vortex assembly 7 expands radially outward along the limiting rod 17. Connect the external ventilation device to the air pipe 16 and introduce compressed gas into the ventilation chamber 18. The gas enters the elastic element 14 through the ventilation groove 19, causing it to expand and adhere to the inner wall of the vortex chamber 26. Rotate the gear sealing plate 3 to drive the expanded elastic element 14 to rotate along the inner wall of the chamber, scraping off the attached dust, scale, and impurities. After cleaning, open the solenoid valve to discharge the internal gas. At the same time, use the airflow to blow out the residual water stains and dust from the nozzle 28, so that the nozzle 28 is automatically unblocked. Rotate the rotating rod 21 in the opposite direction to retract and reset the vortex assembly 7. The adjacent sealing gaskets adhere to each other to form a sealing structure, and it can be put back into spraying use.

[0038] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dust suppression device for metal mining operations, comprising a nozzle body, characterized in that, The nozzle body includes: The shell has a spray hole at one end and a water inlet on one side; A gear sealing plate is movably mounted on the housing at one end away from the nozzle. A drive assembly is located inside the housing, with one end mounted on the inner sidewall of the gear sealing plate; The control component is located inside the housing, and the air tube at one end of the component moves through the center of the drive component and the gear sealing plate in sequence. A swirling device is located inside the housing, sleeved on the outside of the control assembly, and is connected to the drive assembly for transmission. The driving assembly is used to drive the swirling device to expand or contract; the gear sealing plate is used to drive the swirling device to rotate as a whole via the driving assembly when rotating; the regulating assembly is used to introduce gas when the swirling device expands outward so that it abuts against the inner wall of the housing.

2. The dust suppression device for metal mining operations according to claim 1, characterized in that, The swirling device includes multiple sets of swirling components evenly arranged in a ring; each set of swirling components includes an arc-shaped swirling element, side sealing plates and connecting rods respectively disposed at both ends of the swirling element, and a toggle rod provided at the other end of the connecting rod; slots are opened on both sides of the swirling element, and an inclined groove for forming swirl is opened on the outer side wall; an airbag-type elastic element is provided between adjacent swirling elements, and the two sides of the elastic element are fixedly connected to the slots of the adjacent swirling elements, and the open end of the elastic element is fixed to the venting groove on the outer side wall of the control component, and the connection is sealed; sealing gaskets are provided on both sides of the swirling element and the side sealing plate.

3. The dust suppression device for metal mining operations according to claim 2, characterized in that, The control assembly includes a control cylinder, an air tube, and multiple sets of limiting rods; one end of the air tube is connected to the control cylinder, and the other end sequentially passes through the center of the drive assembly and the gear sealing plate; the limiting rods are evenly distributed at one end of the control cylinder near the gear sealing plate, and limiting grooves are formed inside them, with each connecting rod movably engaged in the corresponding limiting groove; the control cylinder has a ventilation cavity at its center, which is connected to the air tube; multiple sets of ventilation grooves are evenly distributed on the side wall of the control cylinder, and the two ends of each set of ventilation grooves are respectively connected to the elastic element and the ventilation cavity to form a sealing structure.

4. The dust suppression device for metal mining operations according to claim 3, characterized in that, The drive assembly includes a rotating rod, a driving gear, a bushing, and a driven gear; the driven gear is movably sleeved on the outside of the trachea through the bushing and installed on the inner side wall of the gear sealing plate; one end of the rotating rod is connected to the driving gear, and the other end passes through and extends out of the gear sealing plate; The driving gear meshes with the driven gear; the driven gear has multiple sets of arc-shaped grooves, and each of the actuating rods moves through the corresponding arc-shaped groove.

5. The dust suppression device for metal mining operations according to claim 4, characterized in that, The end of the rotating rod extending out of the gear sealing plate has a drive groove and a fixing bolt; or, the end of the rotating rod extending out of the gear sealing plate is connected to the first motor through a transmission assembly.

6. The dust suppression device for metal mining operations according to claim 1, characterized in that, The gear sealing plate has teeth on its outer side for meshing and transmission with external gears.

7. The dust suppression device for metal mining operations according to claim 6, characterized in that, It includes multiple nozzle bodies, and the outer side of the gear sealing plate of each of the multiple nozzle bodies is engaged with a gear ring with internal gear teeth.

8. The dust suppression device for metal mining operations according to claim 6 or 7, characterized in that, The external gear or gear ring is connected to the second motor drive.

9. The dust suppression device for metal mining operations according to claim 1, characterized in that, The gear sealing plate is installed with a sealing sleeve on one side inside the housing, and the swirling device is sleeved on the outside of the sealing sleeve.

10. The dust suppression device for metal mining operations according to claim 1, characterized in that, The housing is provided with a vortex cavity, a throat and a nozzle, and the drive assembly, swirling device and control assembly are all located in the vortex cavity.

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