Coal mine coal mining spray dust prevention device

Abstract

The application discloses a coal mine coal mining spray dust prevention device and relates to the technical field of coal mine dust reduction.The device comprises a fixed shell, one end of the fixed shell is rotationally connected with a rotating shell, and one end of the rotating shell is fixedly connected with a filter screen plate.The device is provided with a cleaning mechanism, a hydraulic cylinder is started to drive a sliding piston rod to enter a fixed cylinder, oil in the fixed cylinder enters a sliding groove, and a sliding rod and an extrusion column are extruded to move outward, a driving motor drives the rotating shell, the filter screen plate, a filter screen frame and a filter screen body to rotate through a gear and a circular rack, the filter screen body enters a cleaning box through a gap for cleaning, the extrusion column can extrude two filter screen plates to be opened, the filter screen frame and the two filter screen bodies are continuously rotated, the cleaned filter screen body is in contact with an arc-shaped extrusion plate, the arc-shaped extrusion plate extrudes the filter screen body to be reset, the two filter screen plates can be opened for cleaning, and thus the cleaning effect of the filter screen body is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mine dust suppression technology, and in particular to a coal mine coal mining spray dust suppression device. Background Technology

[0002] Dust pollution is one of the core issues threatening safe production and worker health during coal mining. Spray dust suppression devices typically rely on fans to drive airflow to mix with water mist, and use filters to intercept large dust particles to protect internal components.

[0003] Chinese patent CN214303910U discloses an external spray dust suppression device for coal mining, including a fog cannon body. Torque shafts are installed at both ends of the outer middle of the fog cannon body. A bracket is installed at one end of the torque shaft. The fog cannon body rotates inside the bracket through the torque shaft. A turntable is installed at the bottom of the bracket. A base plate is welded to the bottom of the turntable. A sliding seat is engaged at the bottom of the base plate.

[0004] However, the above invention has the following shortcomings: In high-concentration dust environments, the pre-filter of the existing coal mine spray dust suppression device is prone to rapid dust accumulation and blockage, which leads to a sharp increase in ventilation resistance. This is a bottleneck problem that restricts the continuous and effective efficiency of spray dust suppression. The mechanical cleaning brush method widely used in the existing technology has inherent defects such as incomplete cleaning, easy to cause secondary dust, interference with ventilation, and poor reliability under high dust conditions. At the same time, the machine often needs to be stopped during the cleaning process, which cannot fundamentally meet the requirements of efficient, continuous and stable operation. Summary of the Invention

[0005] The purpose of this invention is to provide a coal mine dust suppression spray device to solve the problems mentioned in the background art.

[0006] The technical solution of the present invention is: a coal mine dust suppression spray device, comprising a fixed shell, a rotating shell rotatably connected to one end of the fixed shell, a filter screen plate fixedly connected to one end of the rotating shell, and further comprising:

[0007] A cleaning mechanism, which is located on a fixed housing;

[0008] The cleaning mechanism includes a drive unit, an adjustment unit, and a cleaning unit. The cleaning unit includes multiple filter frames slidably connected to the filter screen plate. Each filter frame has two filter screens rotatably connected to it. Multiple fixed tubes are fixedly connected to the inner wall of the fixed shell. One end of each fixed tube is fixedly connected to a tube body. One end of the tube body is rotatably connected to a rotating tube. Multiple grooves are formed on both the rotating tube and the filter screen plate. These grooves communicate with the rotating tube. Sliding rods are slidably connected to each groove. One end of each sliding rod is fixedly connected to a squeezing column, which is located between two filter screens. A cleaning box is rotatably connected to both the rotating shell and the filter screen plate. The cleaning box has a notch, and an arc-shaped squeezing plate is fixedly connected to it, located directly below the notch.

[0009] Preferably, each of the plurality of grooves is provided with a return spring, and the two ends of the return spring are fixedly connected to the filter screen plate and the sliding rod, respectively.

[0010] Preferably, an ultrasonic vibrator is fixedly connected to the inner wall of the cleaning box, and a fixing frame is fixedly connected to the cleaning box, with one end of the fixing frame fixedly connected to the fixing shell.

[0011] Preferably, the drive unit includes a drive motor fixedly connected to the fixed housing, a gear fixedly connected to the output end of the drive motor, and a circular rack fixedly connected to the rotating housing, the circular rack being fixedly connected to the gear.

[0012] Preferably, the adjusting unit includes a fixed cylinder fixedly connected to the fixed shell, a sliding piston rod slidably connected to the fixed cylinder, a connecting pipe fixedly connected to the fixed cylinder, a fixed block fixedly connected to the fixed shell, a hydraulic cylinder fixedly connected to the fixed block, the output end of the hydraulic cylinder fixedly connected to one end of the sliding piston rod, one end of the connecting pipe fixedly connected to the fixed shell, and the connecting pipe communicating with one of the fixed pipes, and one of the fixed pipes communicating with the pipe body.

[0013] Preferably, a fixing plate is fixedly connected to the fixing shell, a sliding rheostat is fixedly connected to the top of the fixing plate, a fixing column is fixedly connected to the sliding piston rod, and the bottom end of the fixing column is fixedly connected to the slider of the sliding rheostat.

[0014] Preferably, the inner wall of the fixed shell is fixedly connected to multiple fixing members, and a circular oil pipe and a circular water pipe are fixedly connected to the multiple fixing members. Multiple nozzles are rotatably connected to the circular water pipes, and a connecting block is fixedly connected to each of the multiple nozzles. Multiple mounting pipes are fixedly connected to the circular oil pipes, and sliding pipes are slidably connected to each of the multiple mounting pipes. Each of the multiple sliding pipes is rotatably connected to a connecting rod on each of the multiple connecting blocks.

[0015] Preferably, an oil inlet pipe is fixedly connected to the annular oil pipe, and one end of the oil inlet pipe is fixedly connected to one of the fixed pipes.

[0016] Preferably, a fan assembly is installed on the inner wall of the fixed shell, and the fan assembly is located at the axial center of the fixed shell.

[0017] This invention provides an improved dust suppression spray device for coal mining, which has the following improvements and advantages compared with the prior art:

[0018] Firstly, this invention, through the design of the cleaning mechanism, activates a hydraulic cylinder to drive a sliding piston rod into a fixed cylinder, allowing oil from the fixed cylinder to enter the sliding groove. This oil then squeezes the sliding rod and the squeezing column outwards. The drive motor, via gears and a ring rack, rotates the rotating shell, filter screen, filter screen frame, and filter screen body, causing the filter screen body to enter the cleaning box through the notch for cleaning. Furthermore, the squeezing column can squeeze and open the two filter screens. As the filter screen frame and the two filter screen bodies continue to rotate, the cleaned filter screen body comes into contact with the arc-shaped squeezing plate. The arc-shaped squeezing plate then repositions the filter screen body, allowing the two filter screens to open for cleaning, thereby improving the cleaning effect on the filter screen body.

[0019] Secondly, this invention, through the setting of the adjustment unit, moves the sliding rod piston rod, which in turn moves the fixed column. The movement of the fixed column then moves the slider on the sliding rheostat. The movement of the slider on the sliding rheostat reduces the power of the fan assembly. When the slider of the sliding rod piston rod returns to its original position, the power of the fan assembly increases, thus realizing the adjustment of the power of the fan assembly.

[0020] Thirdly, this invention allows oil entering the fixed pipe to enter the annular oil pipe through the oil inlet pipe. Then, the oil enters the installation pipe and compresses the sliding pipe to move. The movement of the sliding pipe drives the nozzles to rotate through the connecting rod and connecting block, causing multiple nozzles to rotate inward, thereby reducing the spray range. When the slider of the sliding piston rod returns to its original position, multiple nozzles rotate outward, thereby increasing the spray range. This achieves the goal of reducing the power of the fan assembly and consequently reducing the spray range, thus enabling adaptive adjustment of the spray range.

[0021] Fourthly, when the sliding piston rod resets, the oil squeezed from the fixed cylinder is drawn back. The reset spring drives the sliding rod and the extrusion column to reset. The extrusion column squeezes the two filter screens to reset and simultaneously opens the two filter screens, thereby fixing the filter screens. One filter screen has a horizontal mesh pattern, and the other has a vertical mesh pattern. The two filter screens are combined to form a grid. The opening of the two filter screens increases the mesh size and improves the air intake effect. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the fixed shell in this invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the driving unit in this invention;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter screen body and the extrusion column in this invention;

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the sliding rod and the extrusion column in this invention;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the adjustment unit in this invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the combination of the annular oil pipe and the annular water pipe in this invention;

[0030] Figure 8 This is a schematic diagram of the planar structure of the connecting pipe and the rotating pipe in this invention.

[0031] Figure label:

[0032] 1. Fixed shell; 11. Rotating shell; 12. Drive motor; 13. Gear; 14. Ring rack; 15. Filter screen plate; 16. Filter screen frame; 17. Filter screen body; 2. Fixed tube; 21. Tube body; 22. Rotating tube; 23. Slide groove; 24. Sliding rod; 25. Extrusion column; 26. Return spring; 3. Fixed cylinder; 31. Sliding piston rod; 32. Fixed block; 33. Hydraulic cylinder; 34. Connecting tube; 35. Fixed plate; 36. Sliding rheostat; 37. Fixed column; 4. Cleaning box; 41. Notch; 42. Arc-shaped extrusion plate; 43. Ultrasonic vibrator; 44. Fixed frame; 5. Fixing component; 51. Ring oil pipe; 52. Ring water pipe; 53. Oil inlet pipe; 54. Nozzle; 55. Connecting block; 56. Connecting rod; 57. Sliding tube; 58. Mounting tube; 6. Fan assembly. Detailed Implementation

[0033] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. 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.

[0034] This invention provides an improved coal mine dust suppression spray device. The technical solution of this invention is as follows:

[0035] like Figures 1 to 8 As shown, this embodiment of the invention provides a coal mine dust suppression spray device, including a fixed shell 1, a rotating shell 11 rotatably connected to one end of the fixed shell 1, a filter screen 15 fixedly connected to one end of the rotating shell 11, and further including:

[0036] The cleaning mechanism is located on the fixed housing 1;

[0037] The cleaning mechanism includes a drive unit, an adjustment unit, and a cleaning unit. The cleaning unit includes multiple filter frames 16 slidably connected to the filter screen plate 15. Two filter screen bodies 17 are rotatably connected to each of the multiple filter frames 16. Multiple fixed tubes 2 are fixedly connected to the inner wall of the fixed housing 1. A tube body 21 is fixedly connected to one end of each of the multiple fixed tubes 2, which is close to each other. A rotating tube 22 is rotatably connected to one end of each tube body 21. Multiple sliding grooves 23 are provided on both the rotating tube 22 and the filter screen plate 15. The multiple sliding grooves 23 communicate with the rotating tube 22. Sliding rods 24 are slidably connected to each of the multiple sliding grooves 23. A squeezing column 25 is fixedly connected to one end of each of the multiple sliding rods 24. The squeezing column 25 is located between two filter screen bodies 17. A cleaning box 4 is rotatably connected to both the rotating housing 11 and the filter screen plate 15. The cleaning box 4 has... A curved extrusion plate 42 is fixedly connected to the cleaning box 4 at the notch 41, and the curved extrusion plate 42 is located directly below the notch 41. Through the setting of the cleaning unit, the drive unit drives the rotating shell 11 to rotate, and the rotation of the rotating shell 11 drives the filter screen plate 15, the filter screen frame 16 and the filter screen body 17 to rotate. When the filter screen frame 16 and the filter screen body 17 rotate to the position of the notch 41, the filter screen frame 16 and the filter screen body 17 move downward and enter the cleaning box 4 for cleaning. During the downward movement of the two filter screen bodies 17, the extrusion column 25 opens the two filter screen bodies 17, thereby improving the cleaning effect of the filter screen bodies 17. As the filter screen frame 16 and the two filter screen bodies 17 continue to rotate, the cleaned filter screen bodies 17 come into contact with the curved extrusion plate 42, and the curved extrusion plate 42 extrudes the filter screen bodies 17 to reset.

[0038] Furthermore, each of the multiple slide grooves 23 is provided with a return spring 26, and the two ends of the return spring 26 are fixedly connected to the filter screen plate 15 and the sliding rod 24 respectively; by setting the return spring 26, the return spring 26 can drive the sliding rod 24 to reset.

[0039] Furthermore, an ultrasonic vibrator 43 is fixedly connected to the inner wall of the cleaning box 4, and a fixed frame 44 is fixedly connected to the cleaning box 4, with one end of the fixed frame 44 fixedly connected to the fixed shell 1; through the setting of the ultrasonic vibrator 43, when the filter screen frame 16 and the filter screen body 17 enter the cleaning box 4, the ultrasonic vibrator 43 can clean the cleaning box 4.

[0040] Furthermore, the drive unit includes a drive motor 12 fixedly connected to the fixed housing 1, a gear 13 fixedly connected to the output end of the drive motor 12, and a ring rack 14 fixedly connected to the rotating housing 11. The ring rack 14 is fixedly connected to the gear 13. By setting up the drive unit, the drive motor 12 is started to drive the gear 13 to rotate. The rotation of the gear 13 drives the ring rack 14 and the rotating housing 11 to rotate. The rotation of the rotating housing 11 drives the filter screen plate 15, the filter screen frame 16 and the filter screen body 17 to rotate, thereby driving the filter screen body 17 to rotate, so that each filter screen body 17 can be cleaned.

[0041] Furthermore, the adjustment unit includes a fixed cylinder 3 fixedly connected to the fixed housing 1, a sliding piston rod 31 slidably connected to the fixed cylinder 3, a connecting pipe 34 fixedly connected to the fixed cylinder 3, a fixed block 32 fixedly connected to the fixed housing 1, a hydraulic cylinder 33 fixedly connected to the fixed block 32, the output end of the hydraulic cylinder 33 fixedly connected to one end of the sliding piston rod 31, one end of the connecting pipe 34 fixedly connected to the fixed housing 1, and the connecting pipe 34 connected to one of the fixed pipes 2, which in turn is connected to the pipe body 21; through the design of the adjustment unit... When the hydraulic cylinder 33 is activated, it drives the sliding piston rod 31 into the fixed cylinder 3. The sliding piston rod 31 moves and squeezes the oil in the fixed cylinder 3 into the pipe body 21 through the connecting pipe 34 and one of the fixed pipes 2. Then, it enters the slide groove 23 through the rotating pipe 22. The oil in the slide groove 23 squeezes the sliding rod 24 to move. The movement of the sliding rod 24 causes the return spring 26 to be compressed and elastically deformed. The movement of the sliding rod 24 causes the squeezing column 25 to move outward until the squeezing column 25 is away from the two filter screens 17, thus realizing the adjustment of the position of the squeezing column 25.

[0042] Furthermore, a fixed plate 35 is fixedly connected to the fixed housing 1, a sliding rheostat 36 is fixedly connected to the top of the fixed plate 35, a fixed column 37 is fixedly connected to the sliding piston rod 31, and the bottom end of the fixed column 37 is fixedly connected to the slider of the sliding rheostat 36. A fan assembly 6 is installed on the inner wall of the fixed housing 1, and the fan assembly 6 is located at the axial position of the fixed housing 1. Through the setting of the sliding rheostat 36, the movement of the sliding piston rod 31 drives the fixed column 37 to move, the movement of the fixed column 37 drives the slider on the sliding rheostat 36 to move, and the movement of the slider on the sliding rheostat 36 reduces the power of the fan assembly 6, thereby realizing the adjustment of the power of the fan assembly 6.

[0043] Furthermore, multiple fasteners 5 are fixedly connected to the inner wall of the fixed housing 1. A circular oil pipe 51 and a circular water pipe 52 are fixedly connected to the multiple fasteners 5. Multiple nozzles 54 are rotatably connected to the circular water pipe 52. A connecting block 55 is fixedly connected to each of the multiple nozzles 54. Multiple mounting pipes 58 are fixedly connected to the circular oil pipe 51. Sliding pipes 57 are slidably connected to each of the multiple mounting pipes 58. Connecting rods 56 are rotatably connected to each of the multiple sliding pipes 57 and the multiple connecting blocks 55. An oil inlet pipe 5 is fixedly connected to the circular oil pipe 51. 3. One end of the oil inlet pipe 53 is fixedly connected to one of the fixed pipes 2. Through the setting of the nozzle 54, the oil entering the fixed pipe 2 enters the annular oil pipe 51 through the oil inlet pipe 53, and then the oil enters the mounting pipe 58 to squeeze the sliding pipe 57 to move. The movement of the sliding pipe 57 drives the nozzle 54 to rotate through the connecting rod 56 and the connecting block 55, so that multiple nozzles 54 rotate inward, thereby reducing the spray range. This realizes that the power of the fan assembly 6 is reduced, and the spray range is reduced accordingly, so that the spray range can be adaptively adjusted.

[0044] Working principle: The required cleaning fluid is placed in the cleaning tank 4. The fan assembly 6 is started, so that the outside airflow is filtered through the filter screen 17 and then sprayed out from the nozzle 54. The hydraulic cylinder 33 is started, which drives the sliding piston rod 31 into the fixed cylinder 3. The movement of the sliding piston rod 31 forces the oil in the fixed cylinder 3 into the pipe body 21 through the connecting pipe 34 and one of the fixed pipes 2. Then, it enters the slide groove 23 through the rotating pipe 22. The oil in the slide groove 23 compresses the sliding rod 24 and moves it. The movement of the sliding rod 24 causes the return spring 26 to compress and become elastic. Deformation causes the sliding rod 24 to move, driving the extrusion column 25 outward until it moves away from the two filter screens 17. This activates the drive motor 12, which in turn drives the gear 13 to rotate. The gear 13's rotation drives the ring rack 14 and the rotating shell 11 to rotate. The rotating shell 11's rotation drives the filter screen plate 15, the filter screen frame 16, and the filter screen 17 to rotate. When the filter screen frame 16 and the filter screen 17 rotate to the notch 41, they move downward under gravity, causing the filter screen frame 16 and the two filter screens 17 to... 7. Enter the cleaning box 4, start the ultrasonic vibrator 43 to clean the filter screen 17. During the downward movement of the two filter screens 17, the squeezing column 25 is located in the middle of the two filter screens 17. The squeezing column 25 opens the two filter screens 17, thereby improving the cleaning effect of the filter screens 17. As the filter screen frame 16 and the two filter screens 17 continue to rotate, the cleaned filter screens 17 come into contact with the arc-shaped squeezing plate 42. The arc-shaped squeezing plate 42 squeezes the filter screens 17 to reset them. The sliding piston rod 31 moves along the belt. The moving fixed column 37 moves, which drives the slider on the sliding rheostat 36 to move. The slider on the sliding rheostat 36 moves, reducing the power of the fan assembly 6. The oil entering the fixed pipe 2 enters the annular oil pipe 51 through the oil inlet pipe 53. Then the oil enters the mounting pipe 58, squeezing the sliding pipe 57 to move. The movement of the sliding pipe 57 drives the nozzle 54 to rotate through the connecting rod 56 and the connecting block 55, causing multiple nozzles 54 to rotate inward, thereby reducing the spray range. This achieves the reduction of the power of the fan assembly 6 and the corresponding reduction of the spray range.When the drive motor 12 is turned off and the hydraulic cylinder 33 is started to drive the sliding piston rod 31 to reset, the oil squeezed from the fixed cylinder 3 is drawn back. The reset spring 26 drives the sliding rod 24 and the extrusion column 25 to reset. The extrusion column 25 squeezes the two filter screens 17 to reset and simultaneously opens the two filter screens 17, thus fixing the filter screens 17. One filter screen 17 has a horizontal mesh pattern, and the other filter screen 17 has a vertical mesh pattern. The two filter screens 17 are combined to form a grid. The opening of the two filter screens 17 increases the mesh size and improves the air intake effect. The oil in the annular oil pipe 51 is drawn back, causing the sliding pipe 57 to enter the installation pipe 58. The movement of the sliding pipe 57 drives the nozzle 54 to rotate through the connecting rod 56 and the connecting block 55, causing multiple nozzles 54 to rotate outward and increase the spray range. At the same time, the reset of the sliding piston rod 31 drives the slider on the sliding rheostat 36 to move through the fixed column 37, thereby increasing the power of the fan assembly 6.

[0045] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coal mine coal mining spray dust prevention device comprising a fixed shell (1), characterized in that: One end of the fixed shell (1) is rotatably connected with a rotating shell (11), one end of the rotating shell (11) is fixedly connected with a filter screen plate (15), further comprising: The cleaning mechanism is located on the fixed shell (1); The cleaning mechanism comprises a driving unit, an adjusting unit and a cleaning unit, the cleaning unit comprises a plurality of filter screen frames (16) slidably connected to the filter screen plate (15), two filter screen bodies (17) are rotatably connected to each of the plurality of filter screen frames (16), the inner wall of the fixed shell (1) is fixedly connected with a plurality of fixed pipes (2), the ends of the plurality of fixed pipes (2) close to each other are fixedly connected with a pipe body (21), one end of the pipe body (21) is rotatably connected with a rotating pipe (22), a plurality of sliding grooves (23) are formed in the rotating pipe (22) and the filter screen plate (15) in common, the plurality of sliding grooves (23) are in communication with the rotating pipe (22), a sliding rod (24) is slidably connected in each of the plurality of sliding grooves (23), one end of each of the plurality of sliding rods (24) is fixedly connected with an extrusion column (25), the extrusion column (25) is located between the two filter screen bodies (17), the rotating shell (11) and the filter screen plate (15) are rotatably connected with a cleaning box (4), a notch (41) is formed in the cleaning box (4), an arc-shaped extrusion plate (42) is fixedly connected to the cleaning box (4), and the arc-shaped extrusion plate (42) is located directly below the notch (41); The adjusting unit comprises a fixed cylinder (3) fixedly connected to the fixed shell (1), a sliding piston rod (31) slidably connected to the fixed cylinder (3), a connecting pipe (34) fixedly connected to the fixed cylinder (3), a fixed block (32) fixedly connected to the fixed shell (1), a hydraulic cylinder (33) fixedly connected to the fixed block (32), an output end of the hydraulic cylinder (33) fixedly connected to one end of the sliding piston rod (31), one end of the connecting pipe (34) fixedly connected to the fixed shell (1), and the connecting pipe (34) in communication with one of the fixed pipes (2), and one of the fixed pipes (2) in communication with the pipe body (21); A fixed plate (35) is fixedly connected to the fixed shell (1), a sliding rheostat (36) is fixedly connected to the top of the fixed plate (35), a fixed column (37) is fixedly connected to the sliding piston rod (31), and the bottom end of the fixed column (37) is fixedly connected to the sliding block of the sliding rheostat (36).

2. The coal mine spraying dust fall prevention device according to claim 1, characterized in that: Reset springs (26) are arranged in the plurality of sliding grooves (23), and the two ends of the reset springs (26) are fixedly connected with the filter screen plate (15) and the sliding rod (24) respectively.

3. The coal mine spraying dust fall prevention device according to claim 2, characterized in that: An ultrasonic oscillator (43) is fixedly connected to the inner wall of the cleaning box (4), and a fixed frame (44) is fixedly connected to the cleaning box (4), one end of the fixed frame (44) is fixedly connected to the fixed shell (1).

4. The coal mine spraying dust fall prevention device according to claim 2, characterized in that: The driving unit comprises a driving motor (12) fixedly connected to the fixed shell (1), an output end of the driving motor (12) is fixedly connected with a gear (13), the rotating shell (11) is fixedly connected with a circular ring rack (14), and the circular ring rack (14) is fixedly connected with the gear (13).

5. The coal mine spraying dust fall prevention device according to claim 4, characterized in that: The inner wall of the fixed shell (1) is fixedly connected with a plurality of fixing members (5), a circular ring oil pipe (51) and a circular ring water pipe (52) are fixedly connected to the plurality of fixing members (5), a plurality of spray heads (54) are rotatably connected to the circular ring water pipe (52), a connecting block (55) is fixedly connected to each of the plurality of spray heads (54), a plurality of mounting pipes (58) are fixedly connected to the circular ring oil pipe (51), a sliding pipe (57) is slidably connected to each of the plurality of mounting pipes (58), and a connecting rod (56) is rotatably connected to each of the plurality of connecting blocks (55) and the plurality of sliding pipes (57).

6. The coal mine spraying dust fall prevention device according to claim 5, characterized in that: The circular ring oil pipe (51) is fixedly connected with an oil inlet pipe (53), and one end of the oil inlet pipe (53) is fixedly connected to one of the fixing pipes (2).

7. The coal mine spraying dust fall prevention device according to claim 6, characterized in that: The inner wall of the fixed shell (1) is provided with a fan assembly (6), and the fan assembly (6) is located at the center of the fixed shell (1). The inner wall of the fixed shell (1) is provided with a fan assembly (6), and the fan assembly (6) is located at the center of the fixed shell (1).

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