Automatic spraying dust removal device for coal mine

Abstract

The invention relates to the technical field of spraying dust removal, in particular to a coal mine automatic spraying dust removal device which comprises a motor, a motor output shaft sleeved with a dust suction pipe, a dust suction mechanism arranged on the front end face of a dust suction pipe body in a matched mode, a horn-shaped spraying cover arranged on the periphery of the dust suction mechanism body, and at least one spraying pipe arranged on the rear end face of the spraying cover body. The spraying pipe communicates with the water pipe for spraying in the tunnel; the dust suction mechanism further comprises an inner pipe, a rotating gear ring is fixed to the inner pipe end ring face of an inner pipe body, a fixing ring is arranged on the outer wall of a rotating gear ring body in a clearance fit mode and fixed to the outer pipe end ring face of a dust suction pipe body, and the rotating gear ring rotates to enable negative pressure to be formed in the inner pipe to suck dust in a mine tunnel for dust removal. According to the device, through the synergistic effect of active coal mine dust suction and water mist wetting sedimentation, the dust removal efficiency is remarkably improved, and meanwhile, the device has the advantages of restraining reentrainment of dust, reducing the risk of coal dust explosion and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of spray dust removal, and particularly to an automatic spray dust removal device for coal mines. Background Art

[0002] During coal mining operations in coal mine roadways, spray dust removal is an essential link in coal mining production. If the coal mine roadways are not dusted, it will, at the least, affect the visibility of the operators, and at the worst, endanger the physical and mental health of the personnel, causing potential safety hazards in the coal mine. Even more seriously, if the coal dust exceeds the standard, when encountering a fire source, it is easy to trigger a coal dust explosion accident, resulting in casualties and huge economic losses, seriously threatening the safe production of the enterprise.

[0003] The existing coal mine dust removal spray device filters the water in the water tank through a water pump and then pumps it into the spray pipe, and then sprays water mist through the spray pipe to remove dust in the mine roadway. This dust removal method is simple, but the water consumption for spray dust removal is large, causing a great waste of water resources. At the same time, the spray pipe needs to move forward continuously with the shearer, resulting in a continuous increase in the power consumption of the high-pressure water pump for pressurized transmission, further exacerbating the cost of water energy and electric energy. The existing mine roadway only performs spray and water spraying for dust reduction. After the coal dust on the bottom surface dries, it will cause secondary dust flying, and the above problems cannot be solved fundamentally.

[0004] Therefore, the present application provides an automatic spray dust removal device for coal mines to solve the problems of high cost of dust removal spray and easy secondary dust flying after spray and water spraying mentioned in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic spray dust removal device for coal mines to solve the problems of high energy consumption, easy secondary dust flying, and high production and economic costs of the existing dust removal spray equipment used in coal mining operations in coal mine roadways.

[0006] To solve the above technical problems, the present invention provides an automatic spray dust removal device for coal mines, including a motor. The output shaft of the motor is sleeved in a dust suction pipe. A dust suction mechanism is adaptively arranged on the front end face of the dust suction pipe body. A spray hood with a flared shape is arranged around the dust suction mechanism body. At least one spray pipe is arranged on the rear end face of the spray hood body. The spray pipe is connected to a water pipe for spraying in the mine roadway. The dust suction mechanism further includes an inner pipe. A rotating gear ring is fixedly arranged on the end face of the inner pipe of the inner pipe body. A fixed ring is arranged on the outer wall of the rotating gear ring body with a clearance fit. The fixed ring is fixed on the outer pipe end face of the dust suction pipe body. The rotation of the rotating gear ring forms a negative pressure inside the inner pipe to suck the dust in the mine roadway for dust removal.

[0007] A further improvement of the technical solution of the present invention lies in that: the dust suction mechanism further includes an inner tube. Support rings are evenly spaced and sleeved on the inner tube body in a matching manner. The support rings are properly fitted into the dust suction tube. The rear end of the dust suction tube body is fixed through a coupling. A rotating shaft is arranged through the coupling. The rotating shaft is connected and fixed to the motor shaft through the motor shaft groove.

[0008] A further improvement of the technical solution of the present invention lies in that: the front end face of the rotating shaft body is integrally formed with the rear end face in the inner tube. A number of perforations are evenly arranged on the rear end face of the inner tube body. The perforations are arranged in a ring shape. An outer embedding groove and an inner embedding groove are respectively arranged on the outer circumferential and inner circumferential sides of the perforation body. The outer embedding groove and the inner embedding groove are respectively rotationally fitted with the outer ring edge and the inner ring edge.

[0009] A further improvement of the technical solution of the present invention lies in that: the rotating shaft body is properly fitted through a rotating shaft hole. An inner ring is fixedly arranged on the outer surface of the shaft hole body. An outer ring is sleeved on the outer circumference of the inner ring body. At least one inner ring hole is arranged on the outer ring body. The inner ring hole is vertically arranged with the outer ring hole and is used to connect the dust outlet pipe.

[0010] A further improvement of the technical solution of the present invention lies in that: one end of the inner ring and the outer ring close to the rotating shaft is a sealed inner ring cavity. The inner ring cavity is used to guide the coal dust. The outer ring edge and the inner ring edge of the inner ring and the outer ring body are respectively hermetically fitted into the outer embedding groove and the inner embedding groove.

[0011] A further improvement of the technical solution of the present invention lies in that: the outer ring hole is located on the rotating tube body. The rotating tube body is provided with at least one outer ring hole. The rotating tube ring edge of the rotating tube body is properly sleeved on the inner tube. A sealing ring is arranged at one end of the inner tube body close to the rotating shaft. The sealing ring is used to seal the rotating inner tube.

[0012] A further improvement of the technical solution of the present invention lies in that: a number of vertical capsule holes are evenly penetrated through the ring wall of the fixed ring body. The capsule holes are used to guide the air flow and the coal dust into the dust removal cavity.

[0013] A further improvement of the technical solution of the present invention lies in that: a support ring frame is horizontally arranged in the middle of the rotating tooth ring body. A number of tooth fans are vertically arranged on both end faces of the support ring frame body. Each tooth fan inclines at least 10 degrees towards the inner ring center. Each adjacent tooth fan forms a drainage channel.

[0014] A further improvement of the technical solution of the present invention lies in that: the rotating tooth ring body is properly fitted and sleeved into the fixed ring with a gap. The gap between the fixed ring and the rotating tooth ring is 0.1 - 0.3 mm.

[0015] A further improvement of the technical solution of the present invention lies in that: the spray hood body is a flared body, a spiral groove is provided on the inner wall of the spray hood body, the rear end of the spray hood body is fixedly and adaptively sleeved on the outer wall of the dust suction pipe, a plurality of spray holes are provided on the front annular surface of the front end of the spray hood, each spray hole is respectively communicated with a plurality of spray valves embedded in the spray hood body, the spray valves are communicated with a water pipe through a three-way water pipe, and the water pipe is connected to a water pump.

[0016] A further improvement of the technical solution of the present invention lies in that: the three-way water pipe is connected to at least 2 spray pipes, the rear end of the spray pipe body is fixedly penetrated through the coupling, and the front end of the spray pipe body is hermetically embedded in the spray hood, and the spray pipe is used to support the dust suction pipe.

[0017] A further improvement of the technical solution of the present invention lies in that: the motor is used for fixing the rear legs in a longitudinal row; the dust suction pipe is used for fixing the front legs in a transverse row.

[0018] Adopting the above technical solution, the present invention has the following beneficial effects: 1. A coal mine automatic spray dust removal device provided by the present invention, in which the rotating tooth ring in the dust suction mechanism rotates and cooperates with the fixed ring to suck coal dust in the air from the center, and a negative pressure area is generated in the inner pipe by this high-speed flowing gas; a spray hood is arranged around the dust suction mechanism, and water mist is sprayed in the spray holes in the spray hood to increase the humidity of the coal dust and reduce the explosion risk of the coal dust; through the synergistic effect of actively sucking coal mine dust and wetting and settling of water mist, the dust removal efficiency is significantly improved, the working environment is effectively improved, the risk of workers suffering from pneumoconiosis is fundamentally reduced, and at the same time, it has the advantages of inhibiting secondary dust emission and reducing the explosion risk of coal dust.

[0019] 2. A coal mine automatic spray dust removal device provided by the present invention, the spray hood is designed as a flared body, the rotating tooth ring rotates and cooperates with the fixed ring to suck coal dust in the air from the center, and this high-speed flow will generate a negative pressure area in the inner pipe; the flared design guides the coal dust airflow to smoothly transition through the tapered cross-section to reduce turbulence, and the coal dust particles are more likely to settle or be captured due to inertia, improving the dust removal efficiency; a spiral groove is provided on the inner wall of the spray hood body to force the coal dust airflow to rotate along a spiral path, generating a strong centrifugal force, so that the dust particles are thrown backward, and the spiral groove design forces rotation to generate centrifugal force, improving the particulate matter collection efficiency; the cooperation of the spiral groove and the rotating tooth ring significantly improves the dust removal energy efficiency.

[0020] 3. A coal mine automatic spray dust removal device provided by the present invention, through a rotating shaft adaptively sleeved with an inner ring, the rotating shaft is fixed on the rear end face of the inner pipe to drive the inner pipe to rotate. The outer embedding groove on the rear end face of the inner pipe and the embedding groove are adapted to the rotating inner ring edge and outer ring edge, so that the inner ring and the outer ring form a sealed inner ring cavity for collecting coal dust. Inner ring holes are arranged on the outer ring, the inner ring holes are perpendicular to the outer ring holes and communicate with the dust outlet pipe, and the dust outlet pipe is connected to an explosion-proof dust collector for collecting coal dust. The explosion-proof dust collector further improves the dust removal efficiency and can carry out efficient dust removal with only very small energy consumption. Compared with the traditional dust removal method, the comprehensive energy consumption is reduced by more than 30%, and it is especially suitable for working scenarios with high dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is an overall schematic diagram of a coal mine automatic spray dust removal device; Figure 2 It is Figure 1 the front structure schematic diagram of the spray hood in Figure 3 It is a partial enlarged structure schematic diagram of the spray hood and the fixing ring; Figure 4 It is a partial enlarged structure schematic diagram of the fixing ring and the rotating gear ring; Figure 5 It is a partial enlarged structure schematic diagram of the fixing ring and the outer pipe; Figure 6 It is a partial enlarged structure schematic diagram of the fixing ring and the rotating gear ring; Figure 7 It is Figure 1 the structure schematic diagram of the inner pipe and the rotating gear ring in Figure 8 It is the structure schematic diagram of the rotating gear ring; Figure 9 It is a partial enlarged structure schematic diagram of the inner pipe and the outer pipe; Figure 10 It is the structure schematic diagram of the spray hood and the outer pipe; Figure 11 It is the structure schematic diagram of the rotating shaft and the inner pipe; Figure 12 It is the structure schematic diagram of the inner pipe and the perforation; Figure 13 It is the structure schematic diagram of the rotating pipe and the inner ring; Figure 14 It is a schematic structural diagram of a shaft hole and an inner ring cavity; Figure 15 It is a partially enlarged structural schematic diagram of a rotating pipe and an outer ring hole; Figure 16 It is a partially enlarged structural schematic diagram of a water pipe and a three-way water pipe.

[0023] Reference numerals: 1, rear support leg; 2, front support leg; 3, motor; 4, dust outlet pipe; 5, dust suction pipe; 6, spray pipe; 7, spray hood; 71, spray hole; 72, front ring surface; 73, spiral groove; 8, dust suction mechanism; 81, fixing ring; 811, capsule hole; 812, outer pipe end ring surface; 82, rotating toothed ring; 821, tooth fan; 822, inner pipe end ring surface; 823, support ring frame; 824, drainage channel; 83, inner pipe; 831, support ring; 832, sealing ring; 833, perforation; 834, outer embedding groove; 835, inner embedding groove; 84, coupling; 9, water pipe; 91, three-way water pipe; 92, rear end surface; 10, rotating shaft; 101, sleeve; 102, outer ring; 103, inner ring; 104, inner ring hole; 105, outer ring hole; 106, sleeve ring edge; 107, shaft hole; 108, inner ring edge; 109, outer ring edge; 110, inner ring cavity; 11, motor shaft groove. Detailed implementation manners

[0024] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following further explains and illustrates the present invention in conjunction with specific embodiments.

[0028] Such as Figures 1 - 16As shown in the figure, a coal mine automatic spray dust removal device provided in this embodiment includes a motor 3. The output shaft of the motor 3 is sleeved inside a dust suction pipe 5. A dust suction mechanism 8 is adaptively arranged on the front end face of the main body of the dust suction pipe 5. A spray hood 7 in the shape of a flare is arranged around the main body of the dust suction mechanism 8. At least one spray pipe 6 is arranged on the rear end face of the main body of the spray hood 7. The spray pipe 6 is connected to a water pipe 9 for spraying in the mine roadway; the motor 3 is fixed to the rear support legs 1 arranged longitudinally; the dust suction pipe 5 is fixed to the front support legs 2 arranged horizontally; the dust suction mechanism 8 further includes an inner pipe 83. A rotating gear ring 82 is fixed to the inner pipe end ring surface 822 inside the main body of the inner pipe 83. A fixed ring 81 is arranged in clearance fit with the outer wall of the main body of the rotating gear ring 82. The fixed ring 81 is fixed to the outer pipe end ring surface 812 of the main body of the dust suction pipe 5. The rotation of the rotating gear ring 82 causes a negative pressure to be formed inside the inner pipe 83 to suck the dust in the mine roadway into the dust removal system. Specifically, the motor 3 is fixed on the rear support legs 1 arranged longitudinally, the dust suction pipe 5 is fixed on the front support legs 2 arranged horizontally, the output shaft of the motor 3 is sleeved inside the dust suction pipe 5, a rotating inner pipe 83 is adaptively sleeved inside the dust suction pipe 5, a rotating gear ring 82 is fixedly installed on the inner pipe end ring surface 822 of the main body of the inner pipe 83 far from the motor, a fixed ring 81 is sleeved in clearance around the outer periphery of the rotating gear ring 82, and the fixed ring 81 is fixed to the outer pipe end ring surface 812 of the dust suction pipe 5 far from the motor 3. The motor 3 drives the inner pipe 83 to rotate, the inner pipe 83 drives the rotating gear ring 82 to rotate, and the rotating gear ring 82 and the fixed ring 81 form a negative pressure to suck the coal dust in the mine roadway into the inner pipe 83; a spray hood 7 is fixedly arranged at one end of the dust suction pipe 5 far from the motor 3. The spray hood 7 covers the fixed ring 81 and the rotating gear ring 82. The spray hood 7 is in the shape of a flare. A plurality of spray holes 71 are arranged on the front ring surface 72 at the front end of the main body of the spray hood 7. The spray holes 71 penetrate through the main body of the spray hood 7 and are connected to the spray pipes 6 on the rear end face. The spray pipes 6 are connected to the water pipe 9 for spraying at the dust removal port; through the rotation of the rotating gear ring 82 in the dust suction mechanism 8 and its cooperation with the fixed ring 81, the coal dust in the air is sucked from the center. This high-speed flow will generate a negative pressure area inside the inner pipe 83; a spray hood 7 is arranged around the dust suction mechanism 8. The water mist sprayed out from the spray holes 71 in the spray hood 7 increases the humidity of the coal dust and reduces the explosion risk of the coal dust; through the synergistic effect of actively sucking the coal mine dust and wetting and settling of the water mist, the dust removal efficiency is significantly improved, the working environment is effectively improved, the risk of workers suffering from pneumoconiosis is fundamentally reduced, and at the same time, it has the advantages of suppressing secondary dust emission and reducing the risk of coal dust explosion.

[0029] As Figure 1 , Figure 9 , Figure 11 , Figure 12 , Figure 13 , Figure 14As shown in the figure, in this embodiment, the dust suction mechanism 8 further includes an inner tube 83. Support rings 831 are evenly spaced and sleeved on the body of the inner tube 83. The support rings 831 are fitted into the dust suction tube 5. The rear end of the body of the dust suction tube 5 is fixed by a coupling 84. A rotating shaft 10 is disposed through the coupling 84. The rotating shaft 10 is connected and fixed to the output shaft of the motor 3 through the motor shaft groove 11. The front end face of the body of the rotating shaft 10 is integrally formed with the rear end face 92 in the inner tube 83. A plurality of through holes 833 are evenly arranged on the rear end face 92 of the body of the inner tube 83. The through holes 833 are arranged in a ring shape. An outer embedding groove 834 and an inner embedding groove 835 are respectively arranged on the outer circumferential and inner circumferential sides of the body of the through hole 833. The outer embedding groove 834 and the inner embedding groove 835 are respectively rotationally fitted with the outer ring edge 109 and the inner ring edge 108. Specifically, the inner tube 83 is fitted into the dust suction tube 5. The support rings 831 are sleeved on the body of the inner tube 83. The support rings 831 are adapted to the inner wall of the dust suction tube 5. The support rings 831 can reduce the shaking and offset of the inner tube 83 during high-speed rotation and increase the support strength of the dust suction tube 5. The rear end face of the body of the dust suction tube 5 is fixed by a coupling 84. A rotating shaft 10 is disposed through the coupling 84. The rotating shaft 10 is embedded and connected to the output shaft of the motor 3 through the motor shaft groove 11. The coupling 84 is fixed to the housing of the motor 3 by bolts and does not rotate. The coupling 84 is used to fix the dust suction tube 5 and protect the output shaft of the motor 3. A rotating shaft 10 is disposed through the coupling 84. The rotating shaft 10 is connected and fixed to the output shaft of the motor 3 through the motor shaft groove 11. The front end face of the body of the rotating shaft 10 is integrally formed with the rear end face 92 in the inner tube 83. The rotation of the rotating shaft 10 drives the inner tube 83 to rotate. A plurality of through holes 833 are evenly arranged on the rear end face 92 of the body of the inner tube 83. The through holes 833 are arranged in a ring shape. The through holes 833 are used to convey the coal dust sucked into the inner tube 83 into the inner ring cavity 110. A plurality of through holes 833 are arranged in a ring shape on the rear end face 92 of the body of the inner tube 83. An outer embedding groove 834 and an inner embedding groove 835 are respectively arranged on the outer circumferential and inner circumferential sides of the body of the through hole 833. The outer embedding groove 834 and the inner embedding groove 835 are respectively adapted to the rotating outer ring edge 109 and the inner ring edge 108. The outer ring edge 109 and the inner ring edge 108 are respectively located on the outer ring 102 and the inner ring 103. The outer ring 102, the inner ring 103 and the sleeve 101 form the inner ring cavity 110. The inner ring 103 is fixedly sleeved in the outer ring 102, and the outer ring 102 is fixedly sleeved in the sleeve 101. The rear ring faces of the bodies of the outer ring 102 and the inner ring 103 are vertically fixed to the inner side wall of the rear end face 92. The inner wall of the inner ring 103 is adapted to sleeve the rotating shaft 10. The rotating shaft 10 and the inner ring 103 are in a bearing structure. The body of the rotating shaft 10 rotates at a high speed while the inner ring edge 108 in the inner ring 103 is in a stationary state in the inner embedding groove 835. The innovative design of this structure facilitates the continuous collection of coal dust without stopping the machine, greatly improving the coal dust collection efficiency.

[0030] Further, the main body of the rotating shaft 10 is adapted to penetrate through the axially rotating shaft hole 107. An inner ring 103 is fixedly arranged on the outer surface of the main body of the shaft hole 107. An outer ring 102 is sleeved on the outer periphery of the main body of the inner ring 103. At least one inner ring hole 104 is arranged on the main body of the outer ring 102. The inner ring hole 104 is vertically arranged with the outer ring hole 105 and is used for connecting the dust outlet pipe 4. One end of the inner ring 103 and the outer ring 102 close to the rotating shaft 10 is a sealed inner ring cavity 110, which is used for guiding coal dust. The outer ring edge 109 and the inner ring edge 108 of the main bodies of the inner ring 103 and the outer ring 102 are respectively sealed and adapted to be embedded in the outer embedding groove 834 and the inner embedding groove 835. The outer ring hole 105 is located on the main body of the sleeve 101. At least one outer ring hole 105 is arranged on the main body of the sleeve 101. The sleeve ring edge 106 of the main body of the sleeve 101 is suitably sleeved on the inner pipe 83. A sealing ring 832 is arranged at one end of the main body of the inner pipe 83 close to the rotating shaft 10, and the sealing ring 832 is used for sealing the rotating inner pipe 83. Specifically, the main body of the rotating shaft 10 is adapted to penetrate through the shaft hole 107. The inner ring 103 is fixedly arranged on the outer surface of the main body of the shaft hole 107. The rotating shaft 10 and the inner ring 103 form a bearing structure. The outer ring 102 is sleeved on the outer periphery of the main body of the inner ring 103, and the distance between the inner ring 103 and the outer ring 102 is at least 5 cm; at least one inner ring hole 104 is arranged on the main body of the outer ring 102, and the inner ring hole 104 is used for adaptively installing the dust outlet pipe 4; a sealed inner ring cavity 110 is formed among the inner ring 103, the outer ring 102 and the sleeve 101, and the inner ring cavity 110 is used for temporarily storing and guiding coal dust. The sealed inner ring cavity 110 is also composed of the outer ring edge 109 and the inner ring edge 108 of the main bodies of the inner ring 103 and the outer ring 102 respectively being sealed and adapted to be embedded in the outer embedding groove 834 and the inner embedding groove 835; an outer ring hole 105 is arranged on the sleeve 101, and the diameters of the outer ring hole 105 and the inner ring hole 104 are mutually adapted and are in a straight-line design, which is convenient for the installation and connection of the dust outlet pipe 4; the sleeve ring edge 106 of the main body of the sleeve 101 is suitably sleeved on the rear end of the inner pipe 83, and a sealing ring 832 is arranged at one end of the main body of the inner pipe 83 close to the rotating shaft 10. The sealing ring 832 further seals the inner ring cavity 110 and reduces the leakage of coal dust.

[0031] Such as Figures 2 - 8As shown, in this embodiment, a plurality of vertical capsule holes 811 are uniformly and penetratingly provided on the body wall of the fixed ring 81. The capsule holes 811 are used to guide air flow and coal dust into the dust removal cavity. A support ring frame 823 is horizontally arranged in the middle of the body of the rotating gear ring 82. A plurality of tooth fans 821 are vertically arranged on both end faces of the body of the support ring frame 823. Each tooth fan 821 is inclined at least 10 degrees towards the inner ring center, and each adjacent pair of tooth fans 821 forms a drainage channel 824. The body of the rotating gear ring 82 is sleeved into the fixed ring 81 with an adapted gap. The gap between the fixed ring 81 and the rotating gear ring 82 is 0.1 - 0.3 mm. Specifically, the fixed ring 81 is installed on the outer pipe end face 812 of the dust suction pipe 5. A plurality of annularly arranged and perpendicular capsule holes 811 are uniformly and penetratingly provided on the body wall of the fixed ring 81. The multiple capsule holes 811 serve as air flow channels for sucking in coal dust, reducing air flow disorder. The rotating gear ring 82 is sleeved into the fixed ring 81 with an adapted gap. The gap between the fixed ring 81 and the rotating gear ring 82 is 0.3 mm. The rotating gear ring 82 is fixed on the inner pipe end face 822 of the inner pipe 83. The high-speed rotating inner pipe 83 and the rotating gear ring 82 form a negative pressure area. A support ring frame 823 is horizontally arranged in the middle of the body of the rotating gear ring 82. A plurality of tooth fans 821 are vertically arranged on both end faces of the body of the support ring frame 823. Each tooth fan 821 is inclined at least 10 degrees towards the inner ring center, and each adjacent pair of tooth fans 821 forms a drainage channel 824. Part of the coal dust gas enters the capsule holes 811 in the fixed ring 81 along the spiral groove 73 on the inner wall of the spray cover 7 with a flared opening, enabling the coal dust-containing gas to directly enter the inner pipe 83 from the edge of the drainage channel 824 below the rotating gear ring 82. The drainage channel 824 is provided below the rotating rotating gear ring 82 to reduce coal dust accumulation in the drainage channel 824, and the support ring frame 823 and the tooth fans 821 are integrally formed; this structure has the advantages of simplicity, low cost, and high coal dust collection efficiency.

[0032] As Figures 1 - 4 , Figure 10 , Figure 16As shown, in this embodiment, the main body of the spray hood 7 is a flared body. A spiral groove 73 is provided on the inner wall of the main body of the spray hood 7. The rear end of the main body of the spray hood 7 is fixedly sleeved on the outer wall of the dust suction pipe 5. A plurality of spray holes 71 are provided on the front annular surface 72 at the front end of the spray hood 7. Each spray hole 71 is respectively communicated with a plurality of spray valves embedded in the main body of the spray hood 7. The spray valves are communicated with the water pipe 9 through a three-way water pipe 91. The water pipe 9 is connected to a water pump. The three-way water pipe 91 is connected to at least two spray pipes 6. The rear end of the main body of the spray pipe 6 passes through and is fixed by a coupling 84. The front end of the main body of the spray pipe 6 is hermetically embedded in the spray hood 7. The spray pipe 6 is used to support the dust suction pipe 5. Specifically, the rear end of the main body of the spray hood 7 is fixedly sleeved on the outer wall of the dust suction pipe 5. The spray hood 7 is designed as a flared body. A spiral groove 73 is provided on the inner wall of the main body of the spray hood 7. A plurality of spray holes 71 are provided on the front annular surface 72 at the front end of the spray hood 7. Each spray hole 71 is respectively communicated with a plurality of spray valves (not shown in the figure) embedded in the main body of the spray hood 7. The spray valves are commercially available products and will not be elaborated here. The spray valves are communicated with the water pipe 9 through a three-way water pipe 91. The water pipe 9 is connected to a water pump (not shown in the figure). The water pump is a commercially available product and will not be elaborated here. The water pump pumps out the filtered water to reduce the blockage of the spray holes 71. The three-way water pipe 91 is connected to at least two spray pipes 6. The three-way water pipe 91 is a commercially available product and will not be elaborated here. The rear end of the main body of the spray pipe 6 passes through and is fixed by a coupling 84. The front end of the main body of the spray pipe 6 is hermetically embedded in the spray hood 7. The spray pipe 6 is used to support the dust suction pipe 5. The spray hood 7 is used for collecting coal dust and spraying on a large scale; the spray hood 7 is designed as a flared body. The rotating tooth ring 82 rotates and cooperates with the fixed ring 81 to suck coal dust in the air from the center. This high-speed flow will generate a negative pressure area in the inner pipe 83; the flared design guides the coal dust airflow to smoothly transition through a tapered cross-section to reduce turbulence. Due to inertia, coal dust particles are more likely to settle or be trapped, improving the dust removal efficiency; a spiral groove 73 is provided on the inner wall of the main body of the spray hood 7 to force the coal dust airflow to rotate along a spiral path, generating a strong centrifugal force, causing the dust particles to be thrown backward. The design of the spiral groove 73 forces the airflow to rotate to generate centrifugal force, improving the particulate matter collection efficiency; the cooperation of the spiral groove 73 and the rotating tooth ring 82 significantly improves the dust removal energy efficiency.

[0033] The present invention also provides a working principle of a coal mine automatic spray dust removal device: The motor 3 drives the rotation of the inner pipe 83 through the rotating shaft 10. The rotating gear 82 at the front end of the inner pipe 83 rotates at a high speed with the inner pipe 83, forming a low-pressure area of -2Kpa in the inner pipe; coal dust and gas are introduced from the capsule holes 811 in the fixed ring 81 and enter through the drainage channels 824 in the rotating tooth ring 82. eachThe inclination angle of the tooth fan 821 towards the inner ring center is preferably 20 degrees to balance the air flow velocity and resistance; the coal dust-containing gas directly penetrates through the middle of the rotating tooth ring 82 and enters the inner pipe 83. Part of the coal dust-containing gas enters the capsule holes 811 in the fixed ring 81 along the spiral groove 73 on the inner wall of the spray cover 7 of the bell mouth. The width of the main body of the fixed ring 81 is greater than that of the main body of the rotating tooth ring 82, so that the coal dust-containing gas directly enters the inner pipe 83 from the edge of the drainage channel 824 below the rotating tooth ring 82. A drainage channel 824 is arranged below the rotating rotating tooth ring 82 to reduce the coal dust accumulation in the drainage channel 824, and the coal dust in the drainage channel 824 is quickly sucked in through the negative pressure of the inner pipe 83. A plurality of through holes 833 are arranged in a circular arrangement on the rear end face 92 of the main body of the inner pipe 83. An outer embedding groove 834 is arranged on the outer periphery of the through hole 833, and an inner embedding groove 835 is arranged on the inner periphery of the through hole 833. The outer embedding groove 834 and the inner embedding groove 835 are adapted to the outer ring 102 and the inner ring 103. The outer ring 102, the inner ring 103, the rear end face 92 and the sleeve 101 form an inner ring cavity 110, and the inner ring cavity 110 is used for temporarily storing coal dust. An inner ring hole 104 is arranged on the main body of the outer ring 102, and the inner ring hole 104 is vertically arranged with the outer ring hole 105 on the sleeve 101 to facilitate the installation of the dust outlet pipe 4. The inner ring 103 and the rotating shaft 10 are of a bearing structure, with the inner rotating and the outer stationary. An explosion-proof vacuum cleaner is installed at the other end of the dust outlet pipe 4. This vacuum cleaner only needs to use a very small power to cooperate with the negative pressure area in the inner pipe 83 to achieve efficient dust collection; the negative pressure area of the inner pipe 83 can be adjusted according to the use scenario to achieve the negative pressure value of the negative pressure area, and the explosion-proof vacuum cleaner also adjusts the negative pressure value according to the user's needs. In cooperation with the spray holes 71 on the spray cover 7, water mist is sprayed in the spray holes 71 to increase the humidity of the coal dust and reduce the explosion risk of the coal dust; through the synergistic effect of actively sucking coal mine dust and wetting and settling of water mist, the dust removal efficiency is significantly improved, the working environment is effectively improved, the risk of workers suffering from pneumoconiosis is fundamentally reduced, and at the same time, it has the advantages of suppressing secondary dust flying and reducing the explosion risk of coal dust.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic spray dust removal device for coal mines, characterized in that, It includes a motor (3). The output shaft of the motor (3) is sleeved inside a dust suction pipe (5). The front end face of the main body of the dust suction pipe (5) is adaptively provided with a dust suction mechanism (8). A spray hood (7) with a flared shape is arranged around the main body of the dust suction mechanism (8). At least one spray pipe (6) is arranged on the rear end face of the main body of the spray hood (7). The spray pipe (6) is connected to a water pipe (9) for spraying in a mine roadway. The dust suction mechanism (8) further includes an inner pipe (83). A rotating gear ring (82) is fixed on the end face of the inner pipe end of the inner pipe (83). A fixed ring (81) is arranged with a clearance fit on the outer wall of the main body of the rotating gear ring (82). The fixed ring (81) is fixed on the outer pipe end face (812) of the main body of the dust suction pipe (5). The rotation of the rotating gear ring (82) causes a negative pressure to be formed inside the inner pipe (83) to suck the dust in the mine roadway into the dust removal system.

2. The automatic spray dust removal device for coal mines according to claim 1, characterized in that, The dust suction mechanism (8) further includes an inner pipe (83). Support rings (831) are evenly spaced and sleeved on the main body of the inner pipe (83) with a fit. The support rings (831) are fitted into the dust suction pipe (5). The rear end of the main body of the dust suction pipe (5) is fixed by a coupling (84). A rotating shaft (10) is arranged through the coupling (84). The rotating shaft (10) is connected and fixed to the shaft of the motor (3) through a motor shaft groove (11).

3. The automatic spray dust removal device for coal mines according to claim 2, characterized in that, The front end face of the main body of the rotating shaft (10) is integrally formed with the rear end face (92) in the inner pipe (83). A number of through holes (833) are evenly arranged on the rear end face (92) of the main body of the inner pipe (83). The through holes (833) are arranged in a circular pattern. An outer embedding groove (834) and an inner embedding groove (835) are respectively arranged on the outer circumferential and inner circumferential of the main body of the through holes (833). The outer embedding groove (834) and the inner embedding groove (835) are respectively rotationally fitted with an outer ring edge (109) and an inner ring edge (108).

4. The automatic spray dust removal device for coal mines according to claim 3, characterized in that, The main body of the rotating shaft (10) is fitted through a rotating shaft hole (107). An inner ring (103) is fixedly arranged on the outer surface of the main body of the shaft hole (107). An outer ring (102) is sleeved on the outer circumference of the main body of the inner ring (103). At least one inner ring hole (104) is arranged on the main body of the outer ring (102). The inner ring hole (104) is vertically arranged with the outer ring hole (105) and is used to connect a dust outlet pipe (4).

5. The automatic spray dust removal device for coal mines according to claim 3, wherein, One end of the inner ring (103) and the outer ring (102) close to the rotating shaft (10) is a sealed inner ring cavity (110). The inner ring cavity (110) is used for guiding coal dust. The outer ring edge (109) and the inner ring edge (108) of the main bodies of the inner ring (103) and the outer ring (102) are respectively sealed and fitted into the outer embedding groove (834) and the inner embedding groove (835).

6. The automatic spray dust removal device for coal mines according to claim 4, characterized in that, The outer ring hole (105) is located in the main body of the sleeve (101). At least one outer ring hole (105) is arranged on the main body of the sleeve (101). The sleeve ring edge (106) of the main body of the sleeve (101) is fitted on the inner pipe (83). A sealing ring (832) is arranged at one end of the main body of the inner pipe (83) close to the rotating shaft (10). The sealing ring (832) is fitted and connected to the inner pipe (83).

7. The automatic spray dust removal device for coal mines according to claim 1, characterized in that, A number of vertical capsule holes (811) are evenly penetrated through the ring wall of the main body of the fixed ring (81). The capsule holes (811) are used to guide air flow and coal dust into the dust removal cavity.

8. The automatic spray dust removal device for coal mines according to claim 1, characterized in that, A support ring frame (823) is horizontally arranged in the middle of the body of the rotating tooth ring (82). A number of tooth fans (821) are vertically arranged on both end faces of the body of the support ring frame (823). Each tooth fan (821) is inclined at least 10 degrees towards the inner ring center, and a drainage channel (824) is formed between each adjacent tooth fan (821).

9. The automatic spray dust removal device for coal mines according to claim 1, characterized in that The body of the rotating tooth ring (82) is sleeved into the fixed ring (81) with an appropriate gap. The gap between the fixed ring (81) and the rotating tooth ring (82) is 0.1 - 0.3 mm.

10. The automatic spray dust removal device for coal mines according to claim 1, characterized in that, The body of the spray hood (7) is in the shape of a flared mouth. A spiral groove (73) is arranged on the inner wall of the body of the spray hood (7). The rear end of the body of the spray hood (7) is fixedly sleeved on the outer wall of the dust suction pipe (5). A number of spray holes (71) are arranged on the front ring surface (72) at the front end of the spray hood (7). Each spray hole (71) is respectively communicated with a number of spray valves embedded in the body of the spray hood (7). The spray valves are communicated with the water pipe (9) through a three-way water pipe (91), and the water pipe (9) is connected to a water pump.

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