Coal machine water power negative pressure dust removal device

Abstract

The application discloses a coal machine water power negative pressure dust removal device and belongs to the technical field of coal mine dust removal. The device comprises a fixed box, a jet flow assembly and a filter assembly are installed on the fixed box, the filter assembly comprises an outer pipe installed on the fixed box, a filter cylinder is fixedly installed in the outer pipe, the filter cylinder divides the outer pipe into an outer cavity and an inner cavity, a liquid outlet of the jet flow assembly is communicated with the inner cavity, a support shaft is rotatably connected to the outer pipe, an impeller and a driving assembly are installed on the support shaft. The jet flow assembly generates negative pressure to suck coal dust into the jet flow water, impact the coal dust on the impeller and drive the impeller to rotate, the impeller rotates to drive the mixed liquid to the filter cylinder to accelerate filtration, meanwhile, the driving assembly is driven to operate, the driving assembly draws filtered water in the outer cavity and sprays the filtered water out through a plurality of communicated atomizing nozzles, and the device has good dust removal and dust reduction effects.

Description

Technical Field

[0001] This invention relates to the field of coal mine dust removal technology, and more specifically, to a hydrodynamic negative pressure dust removal device for coal mining machinery. Background Technology

[0002] Currently, the cutting of coal by coal cutting machines at coal mining faces generates a large amount of coal dust. This dust not only poses a serious threat to miners' health but may also trigger coal dust explosions, affecting mine safety. Traditional methods of dust suppression, such as internal and external spraying, are ineffective and inefficient. Therefore, we propose a hydrodynamic negative pressure dust removal device for coal cutting machines. Summary of the Invention

[0003] The purpose of this invention is to provide a hydrodynamic negative pressure dust removal device for coal mining machinery, which solves the technical problems that can only be solved by existing technologies and achieves the desired technical effect.

[0004] This invention provides a hydrodynamic negative pressure dust removal device for coal mining machinery, including a fixed box on which a jet assembly and a filter assembly are installed.

[0005] The filtration assembly includes an outer tube mounted on a fixed box, with a filter cylinder fixedly installed inside the outer tube. The filter cylinder divides the outer tube into an outer cavity and an inner cavity, and the liquid outlet of the jet assembly communicates with the inner cavity.

[0006] A support shaft is rotatably connected to the outer tube, and an impeller and a drive assembly are mounted on the support shaft.

[0007] The jet assembly generates negative pressure, drawing in coal dust and mixing it with jet water. This mixture impacts the impeller, causing it to rotate. The rotating impeller pushes the mixture towards the filter cartridge to accelerate filtration. Simultaneously, it drives the drive assembly, which draws the filtered water from the outer cavity and sprays it out through several interconnected atomizing nozzles.

[0008] As a further description of the above technical solution, the jet assembly includes an air intake pipe installed inside a fixed box and a Venturi tube installed at one end of the air intake pipe. A nozzle is installed inside the air intake pipe and connected to a pressurized liquid supply device. An air inlet is provided on the air intake pipe, and the Venturi tube is connected to the inner cavity through a guide tube.

[0009] The axis of the guide tube coincides with a set of chords of the filter cartridge.

[0010] As a further description of the above technical solution, the Venturi tube includes a tapered tube, a throat tube, and a diffuser tube that are connected end to end and coaxial. The tapered tube is connected to the air intake tube and the nozzle. The nozzle is coaxial with the throat tube, and the diffuser tube is connected to the flow guide tube.

[0011] As a further description of the above technical solution, a plurality of centrifugal plates are fixedly installed on the support shaft. The centrifugal plates are located below the horizontal plane and their outer diameter gradually increases from top to bottom. The centrifugal plates have a set angle with the horizontal plane and their tilt angle gradually increases from top to bottom.

[0012] As a further description of the above technical solution, each of the centrifuge plates is provided with through holes, and the through holes on two adjacent sets of centrifuge plates are staggered.

[0013] As a further description of the above technical solution, the drive assembly includes a housing mounted at the bottom of a fixed box, a rotating core rotatably connected inside the housing, the rotating core coaxially mounted at the bottom of a support shaft, and the rotating core eccentrically mounted inside the housing to form a chamber with the housing. An inlet pipe and an outlet pipe are connected to and installed on the chamber.

[0014] From the inlet pipe to the outlet pipe, the space of the chamber first increases and then decreases, and several sliding plates are slidably connected to the rotating core.

[0015] As a further description of the above technical solution, the rotating core is provided with an elastic element for pulling the slide plate to slide inward to the inside of the rotating core.

[0016] As a further description of the above technical solution, the fixed box includes a box body, one side of which is open and fixedly fitted with a protective net. Several diversion plates are installed obliquely inside the box body, forming multiple sets of air ducts.

[0017] A water storage tank is installed on the fixed box, and the drain outlet and water inlet pipe at the bottom of the outer cavity are both connected to the water storage tank.

[0018] As a further description of the above technical solution, a connecting pipe connected to the water outlet pipe is installed inside the box, and several atomizing nozzles are connected to the connecting pipe.

[0019] Several embedded tubes are fixedly installed on the box, and the atomizing nozzles are installed in the corresponding embedded tubes.

[0020] As a further description of the above technical solution, a drive motor is installed on the fixed box, and the output shaft of the drive motor is detachably connected to the end of the support shaft.

[0021] By adopting the above technical solution, the jet water is sprayed through the nozzle into the converging tube and the throat, creating a negative pressure zone in the air intake tube. External coal dust enters the air intake tube from the air inlet of the box through the guide plate and mixes with the jet water in the converging tube and the throat. The mixed jet water is discharged through the diffuser and guide tube and impacts the impeller, which drives the impeller to rotate. The impeller drives the support shaft, centrifugal plate and rotating core to rotate. At the same time, the impeller pushes part of the jet water mixture towards the filter cartridge to accelerate the filtration of coal dust particles. The falling mixture falls onto the centrifugal plate and is pushed towards the filter cartridge again by centrifugal force, further accelerating the filtration of coal dust particles. The coal dust mixture remaining in the inner cavity is discharged from the drain outlet and collected, while the filtered water in the outer cavity enters the water storage tank for secondary use.

[0022] When the drive motor or impeller drives the rotating core to rotate, the water stored in the water tank is drawn in through the water inlet pipe and rotates with the rotating core under the action of the centrifugal sliding vanes. As the chamber shrinks, the water in the chamber is compressed and pressurized and flows from the water outlet pipe to the connecting pipe. Finally, it is sprayed from the atomizing nozzle onto the coal wall, thereby achieving the wetting operation of the coal wall.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. This invention generates negative pressure through the jet water within the jet assembly, rapidly drawing in coal dust and mixing it with the jet water, thereby achieving hydrodynamic dust removal during coal mining, with good dust removal effect and high dust removal efficiency.

[0025] 2. In this invention, the jet water impacts and drives the impeller to rotate. As the impeller rotates, it pushes outward pressurized water, causing some of the pressurized water to quickly pass through the filter cylinder and enter the outer cavity, accelerating the filtration of some pressurized water and improving the separation efficiency of coal dust particles and water. The rotation of the impeller also drives the drive component to work, thereby extracting and atomizing the filtered water and spraying it onto the coal wall. Before coal cutting, the coal wall is moistened, further reducing dust and improving the problem of high coal dust in the coal mining face. At the same time, the filtered water is recycled.

[0026] 3. In this invention, the unfiltered mixture falling from the impeller lands on several centrifuge plates, where it undergoes further centrifugal motion and comes into contact with the filter cartridge again, thus achieving secondary filtration of the mixture. By setting centrifuge plates with different inclinations and outer diameters, the mixture diffuses outward at different angles as it passes through the different centrifuge plates, thereby achieving stratified filtration, reducing the filtration pressure of filter cartridges at the same height, and improving filtration efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a coal mining machinery hydrodynamic negative pressure dust removal device according to a preferred embodiment of the present invention;

[0028] Figure 2This is a schematic diagram of the distribution of the diversion plates in a preferred embodiment of the coal mining machinery hydrodynamic negative pressure dust removal device.

[0029] Figure 3 This is a schematic diagram of the jet assembly structure of a hydrodynamic negative pressure dust removal device for coal mining machinery, as disclosed in a preferred embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the filter assembly structure of a coal mining machinery hydrodynamic negative pressure dust removal device according to a preferred embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation position of the guide pipe of the hydrodynamic negative pressure dust removal device for coal mining machinery, as disclosed in a preferred embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the support shaft connection structure of a coal mining machinery hydrodynamic negative pressure dust removal device according to a preferred embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the working principle of the drive component of the hydrodynamic negative pressure dust removal device for coal mining machinery, as disclosed in a preferred embodiment of the present invention.

[0034] Figure 8 This is a schematic diagram of the drive motor connection structure of a coal mining machinery hydrodynamic negative pressure dust removal device according to a preferred embodiment of the present invention.

[0035] The following are the labels in the diagram: 1. Fixed box; 2. Jet assembly; 3. Filter assembly; 4. Drive assembly; 5. Water tank; 6. Connecting pipe; 7. Atomizing nozzle; 8. Drive motor; 9. Sleeve; 10. Protective cover; 11. Box body; 12. Protective net; 13. Drain plate; 14. Embedded tube; 21. Air intake pipe; 22. Nozzle; 23. Air inlet; 24. Converging tube; 25. Throat; 26. Diffuser; 27. Guide tube; 31. Outer tube; 32. Filter cylinder; 33. Outer cavity; 34. Inner cavity; 35. Support shaft; 36. Impeller; 37. Centrifugal plate; 38. Through hole; 39. Limiting hole; 41. Shell; 42. Rotating core; 43. Chamber; 44. Sliding vane; 45. Elastic element; 46. Water inlet pipe; 47. Water outlet pipe. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Reference Figures 1 to 8This embodiment discloses a coal mining machinery hydrodynamic negative pressure dust removal device, including a fixed box 1, which includes a box body 11. One side of the box body 11 is open and a protective net 12 is fixedly installed. The protective net 12 is used to prevent large coal blocks from entering the box body 11 and blocking the air intake channel, thus ensuring the smooth flow of dust. Several diversion plates 13 are installed at an angle inside the box body 11. The several diversion plates 13 form multiple sets of air ducts to guide the intake coal dust and control the flow direction of the coal dust. Several embedded tubes 14 are fixedly installed on the box body 11, and the embedded tubes 14 are located on the side adjacent to the open side of the box body 11.

[0038] Reference Figures 2 to 4 The housing 11 is equipped with a jet assembly 2, which includes an air intake pipe 21 fixedly installed inside the housing 11 and a venturi tube installed at one end of the air intake pipe 21. The venturi tube is fixed and sealed to the air intake pipe 21 through a flange to prevent liquid leakage at the connection. A nozzle 22 is installed inside the air intake pipe 21. The nozzle 22 is connected to a pressurized liquid supply device, which continuously supplies high-pressure water to the nozzle 22. An air inlet 23 is opened on the air intake pipe 21. Gas guided by several guide plates 13 flows to the air inlet 23, thereby accelerating the adsorption efficiency of coal dust.

[0039] The venturi tube comprises a converging tube 24, a throat 25, and a diffuser 26, which are connected end-to-end and coaxial. Along the direction of high-pressure water flow, the cross-sectional area of ​​the converging tube 24 gradually decreases, while the cross-sectional area of ​​the diffuser 26 gradually increases. The converging tube 24 is located near the intake pipe 21 and is connected to both the intake pipe 21 and the nozzle 22. The nozzle 22 is coaxial with the throat 25, and the outlet inner diameter of the nozzle 22 is not less than the inner diameter of the throat 25. At the end of the venturi tube furthest from the intake pipe 21, a guide pipe 27 connected to the diffuser 26 is installed via a flange. The high-pressure water ejected from the nozzle 22 is gradually accelerated through the converging tube 24 and enters the throat 25, where the flow velocity reaches its maximum and negative pressure is generated. This causes coal dust to be drawn into the intake pipe 21 through the air inlet 23 and mixed with the high-pressure water. The mixed liquid then flows out through the diffuser 26 and the guide pipe 27.

[0040] Reference Figure 1 , Figures 3 to 6A filter assembly 3 is installed on the housing 11. The filter assembly 3 includes an outer tube 31 fixedly installed on the housing 11, and a filter cylinder 32 fixedly installed inside the outer tube 31. The filter cylinder 32 divides the internal space of the outer tube 31 into an outer cavity 33 and an inner cavity 34. A guide pipe 27 passes through the outer tube 31 and the filter cylinder 32 and communicates with the inner cavity 34. A support shaft 35 is rotatably connected to the outer tube 31, and an impeller 36 is fixedly installed on the support shaft 35. The axis of the guide pipe 27 coincides with a set of chords of the filter cylinder 32, that is, the pressurized water sprayed by the guide pipe 27 does not pass through the center of the filter cylinder 32. The impeller 36 is set at the same height as the guide pipe 27. The outlet height corresponds to the pressure water ejected from the guide pipe 27, which impacts the impeller 36 and drives the impeller 36 and support shaft 35 to rotate. Several centrifugal plates 37 are fixedly installed on the support shaft 35. The centrifugal plates 37 are located below the impeller 36 and inside the filter cylinder 32. The outer diameter of the centrifugal plates 37 gradually increases from top to bottom. The centrifugal plates 37 have a set angle with the horizontal plane and the tilt angle gradually increases from top to bottom. Each centrifugal plate 37 has a through hole 38. The through holes 38 on two adjacent sets of centrifugal plates 37 are staggered. The support shaft 35 passes through the outer pipe 31 and has a limit hole 39.

[0041] The high-pressure water impact drives the impeller 36 to rotate. As the impeller 36 rotates, it pushes outward pressurized water, causing some of the pressurized water to quickly pass through the filter cylinder 32 and enter the outer cavity 33, accelerating the filtration of some pressurized water and achieving the separation of some coal dust particles from the pressurized water. The rotation of the impeller 36 also drives the support shaft 35 and several centrifugal plates 37 to rotate. Therefore, the unfiltered mixture falls directly onto the centrifugal plates 37, which further centrifuges and shakes the mixture, allowing it to come into contact with the filter cylinder 32 again for further filtration. By setting centrifugal plates 37 with different inclinations and outer diameters, the mixture diffuses outward at different angles as it passes through the different centrifugal plates 37, thereby achieving stratified filtration, reducing the filtration pressure of the filter cylinder 32 at the same height, and improving filtration efficiency.

[0042] The bottom of the filter cartridge 32 is inclined, and a drain outlet is provided at the lowest point to discharge the filtered coal dust particles. Similarly, a drain outlet is provided at the bottom of the outer cavity 33 to drain the filtered water. It should be noted that if the water treated by the initial filtration does not meet the standards for reuse, further purification can be achieved by installing additional filtration equipment.

[0043] Reference Figure 1 , Figure 4 , Figures 6 to 8A drive assembly 4 is installed at the bottom of the support shaft 35. The drive assembly 4 includes a housing 41 fixedly installed at the bottom of the housing 11. A rotating core 42 is rotatably connected inside the housing 41. The rotating core 42 is coaxially installed at the bottom of the support shaft 35. When the support shaft 35 rotates, the rotating core 42 will rotate synchronously. The rotating core 42 is eccentrically installed inside the housing 41 and forms a chamber 43 with the housing 41. A water inlet pipe 46 and a water outlet pipe 47 are connected to the chamber 43. The space of the chamber 43 from the water inlet pipe 46 to the water outlet pipe 47 first increases and then decreases. Several circular arrayed sliding grooves are opened on the rotating core 42. A sliding piece 44 is slidably connected in the sliding groove. An elastic element 45 is provided in the sliding groove. One end of the elastic element 45 is fixedly connected to the rotating core 42, and the other end is fixedly connected to the sliding piece 44. The elastic element 45 is used to drive the sliding piece 44 to slide into the sliding groove. The rotating core 42 follows the support shaft 35 and rotates at high speed, increasing the volume of the chamber 43 and reducing the pressure in this section. External liquid is drawn into the chamber 43 through the inlet pipe 46. Under the action of centrifugal force, the sliding plate 44 slides to the outside of the rotating core 42, thereby driving the drawn-in liquid to rotate. As the volume of the chamber 43 decreases, the internal pressure increases, thereby pressurizing and delivering the liquid out through the outlet pipe 47. Through the continuous rotation of the rotating core 42, continuous water delivery is achieved.

[0044] A water storage tank 5 is fixedly installed on the housing 11. The drain outlet and water inlet pipe 46 at the bottom of the outer cavity 33 are connected to the water storage tank 5. Therefore, the water filtered by the filter cartridge 32 enters the water storage tank 5. During the rotation of the rotating core 42, the circulating water in the water storage tank 5 is drawn back in, realizing secondary utilization. The water storage tank 5 can be connected to the liquid supply equipment and equipped with a water level monitoring gauge. When the water level is lower than the set height, the liquid supply equipment can actively replenish the stored water. The water storage tank 5 is equipped with a corresponding exhaust system to exhaust the internal gas.

[0045] The housing 11 also contains a connecting pipe 6 connected to the water outlet pipe 47. Several atomizing nozzles 7 are connected to the connecting pipe 6 and installed within corresponding embedded pipes 14. Pressurized water from the water outlet pipe 47 is sprayed through the connecting pipe 6 from the atomizing nozzles 7 towards the coal face and the vicinity of the coal mining machine rollers. This wets the coal face before coal cutting, further reducing dust and alleviating the problem of excessive coal dust at the mining face. Therefore, this invention achieves accelerated coal dust filtration, water recycling, and pressurized atomization spraying onto the coal face for dust reduction using only jet water power, while also reducing the energy consumption of the drive source.

[0046] A drive motor 8 is installed on the housing 11 and protected by a protective cover 10 installed on the housing 11. A sleeve 9 is fixedly installed on the output shaft of the drive motor 8. The sleeve 9 is fitted onto the end of the support shaft 35. A limiting pin passes through the sleeve 9 and is inserted into the limiting hole 39, thereby connecting the support shaft 35 and the output shaft of the drive motor 8. After the limiting pin is removed, the support shaft 35 can be disconnected from the output shaft of the drive motor 8, realizing the disassembly process. When the water pressure does not reach the set water pressure or when it is necessary to adjust the speed of the rotating core 42 or the output flow rate, the drive motor 8 can be actively controlled to improve the adaptability to different working conditions. Moreover, when the drive motor 8 is driven, the rotational power of the impeller 36 and the centrifugal plate 37 can be further increased, thereby improving the filtration efficiency.

[0047] Working principle: The jet water is sprayed through nozzle 22 into the converging tube 24 and throat 25, creating a negative pressure zone in the air intake tube 21. External coal dust enters the air intake tube 21 through the air outlet of the housing 11 via the guide plate 13 and mixes with the jet water in the converging tube 24 and throat 25. The mixed jet water is discharged through the diffuser 26 and guide tube 27 and impacts the impeller 36, causing the impeller 36 to rotate. The impeller 36 drives the support shaft 35, centrifugal plate 37 and rotating core 42 to rotate. At the same time, the impeller 36 pushes part of the jet water mixture towards the filter cartridge 32 to accelerate the filtration of coal dust particles. The falling mixture falls onto the centrifugal plate 37 and is again pushed towards the filter cartridge 32 by centrifugal force, further accelerating the filtration of coal dust particles. The coal dust mixture remaining in the inner cavity 34 is discharged and collected from the drain outlet, while the filtered water in the outer cavity 33 enters the water storage tank 5 for secondary use.

[0048] When the drive motor 8 or impeller 36 drives the rotating core 42 to rotate, the water stored in the water storage tank 5 is drawn in through the water inlet pipe 46 and rotates with the rotating core 42 under the action of the centrifugally sliding vane 44. As the chamber 43 changes from large to small, the water in the chamber 43 is compressed and pressurized and flows from the water outlet pipe 47 to the connecting pipe 6. Finally, it is sprayed from the atomizing nozzle 7 onto the coal wall, thereby achieving the operation of wetting the coal wall, further reducing coal dust and improving the dust suppression effect.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydrodynamic negative pressure dust removal device for coal mining machinery, characterized in that: Includes a fixed box (1), on which a jet assembly (2) and a filter assembly (3) are installed; The filter assembly (3) includes an outer tube (31) installed on a fixed box (1), a filter cylinder (32) is fixedly installed inside the outer tube (31), the filter cylinder (32) divides the outer tube (31) into an outer cavity (33) and an inner cavity (34), and the liquid outlet of the jet assembly (2) is connected to the inner cavity (34); A support shaft (35) is rotatably connected to the outer tube (31), and an impeller (36) and a drive assembly (4) are mounted on the support shaft (35). The jet assembly (2) includes an air intake pipe (21) installed in a fixed box (1) and a venturi tube installed at one end of the air intake pipe (21). A nozzle (22) is installed inside the air intake pipe (21). The nozzle (22) is connected to a pressurized liquid supply device. An air inlet (23) is opened on the air intake pipe (21). The venturi tube is connected to the inner cavity (34) through a guide pipe (27). The jet assembly (2) generates negative pressure to draw coal dust into the jet water and mix it with the jet water, which then impacts the impeller (36) and drives the impeller (36) to rotate. The rotation of the impeller (36) pushes the mixture towards the filter cartridge (32) to accelerate filtration. At the same time, it drives the drive assembly (4) to run. The drive assembly (4) draws the filtered water from the outer cavity (33) into the drive assembly and sprays it out through several interconnected atomizing nozzles (7).

2. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 1, characterized in that: The axis of the guide tube (27) coincides with a set of chords of the filter cylinder (32).

3. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 2, characterized in that: The Venturi tube includes a converging tube (24), a throat (25), and a diffuser (26) that are connected end to end and coaxial. The converging tube (24) is connected to the air intake tube (21) and the nozzle (22). The nozzle (22) is coaxial with the throat (25). The diffuser (26) is connected to the guide tube (27).

4. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 1, characterized in that: Several centrifugal plates (37) are fixedly installed on the support shaft (35). The centrifugal plates (37) are located below and their outer diameter gradually increases from top to bottom. The centrifugal plates (37) have a set angle with the horizontal plane and their tilt angle gradually increases from top to bottom.

5. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 4, characterized in that: A through hole (38) is provided on each of the centrifuge plates (37), and the through holes (38) on two adjacent centrifuge plates (37) are staggered.

6. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 1, characterized in that: The drive assembly (4) includes a housing (41) installed at the bottom of the fixed box (1), a rotating core (42) is rotatably connected inside the housing (41), the rotating core (42) is coaxially installed at the bottom of the support shaft (35), the rotating core (42) is eccentrically installed inside the housing (41) and forms a chamber (43) with the housing (41), and an inlet pipe (46) and an outlet pipe (47) are connected and installed on the chamber (43). From the inlet pipe (46) to the outlet pipe (47), the space of the chamber (43) first increases and then decreases, and several sliding plates (44) are slidably connected on the rotating core (42).

7. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 6, characterized in that: The rotating core (42) is provided with an elastic element (45) for pulling the slide (44) to slide inside the rotating core (42).

8. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 6, characterized in that: The fixed box (1) includes a box body (11), one side of which is open and fixedly fitted with a protective net (12). Several diversion plates (13) are installed obliquely inside the box body (11), forming multiple sets of air ducts. A water storage tank (5) is installed on the fixed box (1), and the drain outlet and water inlet pipe (46) at the bottom of the outer cavity (33) are connected to the water storage tank (5).

9. The coal mining machinery hydrodynamic negative pressure dust removal device according to claim 8, characterized in that: The housing (11) is equipped with a connecting pipe (6) that communicates with the water outlet pipe (47), and a number of atomizing nozzles (7) are connected to the connecting pipe (6). Several embedded tubes (14) are fixedly installed on the housing (11), and the atomizing nozzles (7) are installed in the corresponding embedded tubes (14).

10. The coal mining machinery hydrodynamic negative pressure dust removal device according to any one of claims 1-9, characterized in that: The fixed box (1) is equipped with a drive motor (8), and the output shaft of the drive motor (8) is detachably connected to the end of the support shaft (35).

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