A spray dust removal device for a fully mechanized coal mining face and a control method thereof

Abstract

The present application relates to dust removal equipment technical field, specifically to a kind of coal mine fully mechanized working face's spray dust removal equipment and control method thereof.A kind of coal mine fully mechanized working face's spray dust removal equipment, including base and spray barrel, spray barrel is set on base, spray barrel includes inner tube and outer tube, inner tube is fixedly connected in outer tube.First spray piece is provided on outer tube, and first spray piece includes multiple first spray head.Second spray piece is provided on inner tube, and second spray piece includes multiple second spray head.A kind of coal mine fully mechanized working face's spray dust removal equipment of the present application is set by first spray head and second spray head, first spray head can realize large-scale coverage dust removal, separate staff from dust, reduce the damage of small particle size respiratory dust to people;And the range of second spray head is far, but the mist coverage range is relatively small, so that second spray head can realize full distance dust removal, improve the effect of dust removal.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, specifically to a spray dust removal device and its control method for a fully mechanized coal mining face. Background Technology

[0002] With the continuous improvement of mechanization and mining intensity in open-pit coal mines, the dust generation intensity and dust concentration in the working environment of fully mechanized mining faces have increased significantly. Dust pollution has become a key issue restricting safe production and the health of workers in coal mines. The working conditions of fully mechanized mining faces are complex and the dust sources are diverse. The core dust source mainly comes from the coal wall breaking during the tunneling operation of the roadway machine. The large amount of dust generated by the cutting head of the roadway machine and the coal wall cutting and squeezing will quickly spread into the roadway space. This type of dust has a large total amount of particles and uneven particle size distribution. During the diffusion process away from the working face, large-diameter dust particles will gradually settle under the action of gravity, while small-diameter dust particles, due to their light weight and slow settling speed, can drift in the air for a long time and even spread into the working area of ​​the workers. This kind of dust is easily inhaled into the lungs and causes damage to the human body, hence it is also known as respiratory dust.

[0003] To control dust pollution, dust suppression fog cannons are currently widely used in the industry as the primary dust removal equipment. Their working principle is as follows: water is pressurized by a high-pressure water pump and delivered to an atomizing module, where it is atomized into fine droplets. Then, with the help of wind, the water mist is directed and sprayed onto the dusty area. The water mist particles collide with and are adsorbed by the dust particles in the air, causing the dust to become heavier and naturally settle, thus achieving the effects of dust removal, cooling, and air purification. However, the atomization range of dust suppression fog cannons is mostly fixed or only adjustable, making it difficult to capture respirable dust that drifts over long distances and poses a significant hazard, seriously affecting coal mine safety and the health of workers. Summary of the Invention

[0004] This invention provides a spray dust removal device and its control method for fully mechanized coal mining faces, which solves the problem that the atomization range of existing dust removal devices is mostly fixed or only adjustable, making it difficult to capture respirable dust that drifts a long distance and is highly hazardous, seriously affecting coal mine safety production and the health of personnel.

[0005] The present invention provides a spray dust suppression device for a fully mechanized coal mining face, comprising a base and a spray cylinder. The spray cylinder is mounted on the base and includes an inner cylinder and an outer cylinder. The two ends of the outer cylinder along its axial direction are respectively referred to as the first end and the second end. The first end of the outer cylinder is sealed, and the second end is open. A first spray element is mounted on the outer cylinder, located on one side of the second end. The first spray element includes multiple first nozzles, which are evenly distributed around the axial direction of the outer cylinder. The axial direction of the outer cylinder is referred to as the first direction. The direction is horizontal; the inner cylinder and the outer cylinder are coaxially arranged and fixed inside the outer cylinder. The two ends of the inner cylinder in the first direction are respectively referred to as the third end and the fourth end, and the third end and the fourth end of the inner cylinder are connected in the first direction. The first end, the fourth end, the second end and the third end are arranged in sequence in the first direction. The first end is located on the side of the third end away from the working surface in the first direction. A second spraying element is provided on the inner cylinder. The second spraying element is located on one side of the third end. The second spraying element includes multiple second nozzles, which are evenly distributed around the axis of the inner cylinder. The atomization angle of the first nozzle is greater than that of the second nozzle.

[0006] Furthermore, a flow space is defined between the outer cylinder and the inner cylinder. A rotating fan blade is rotatably installed inside the inner cylinder. The rotation of the fan blade enables the airflow to enter the flow space from the second end of the outer cylinder, and then enter the inner cylinder from the fourth end within the flow space, and finally exit from the third end of the inner cylinder.

[0007] Furthermore, the first spraying component also includes a first pipeline, which is disposed on the inner peripheral wall of the outer cylinder and coaxial with the outer cylinder. Multiple first nozzles are evenly distributed around the axis of the first pipeline and are all connected to the first pipeline. The second spraying component also includes a second pipeline, which is disposed on the inner peripheral wall of the inner cylinder and coaxial with the inner cylinder. Multiple second nozzles are evenly distributed around the axis of the second pipeline and are all connected to the second pipeline. A flow regulating component is provided on the base. The flow regulating component has an inlet and two outlets. The inlet is connected to an external water pump. Both the first pipeline and the second pipeline have a structure with one end closed and the other end open. The two outlets are respectively connected to the openings on the first pipeline and the second pipeline through connecting pipes. The flow regulating component can regulate the flow rate of water discharged through the two outlets per unit time.

[0008] Furthermore, the flow regulating component includes a housing, a flow regulating valve, and an adjusting knob; the housing is mounted on a base, and the inlet and two outlets are both located on the housing. A partition is provided inside the housing, and the partition is located between the two outlets; the flow regulating valve is located inside the housing and slides and seals with the housing and the partition, and the flow regulating valve has multiple flow ports; a first flow chamber and a second flow chamber are defined between the housing, the partition, and the flow regulating valve, and the two outlets are respectively connected to the first flow chamber and the second flow chamber; the adjusting knob is located outside the housing and is connected to the flow regulating valve through an adjusting shaft, and the adjusting shaft is screwed to the housing.

[0009] Furthermore, multiple pressure regulating blocks are installed inside the first pipeline. The multiple pressure regulating blocks and multiple first nozzles are arranged sequentially around the axis of the first pipeline, and the pressure regulating blocks and first nozzles are alternately distributed around the axis of the first pipeline. The pressure regulating blocks are provided with pressure regulating holes, which are trapezoidal holes. A mating hole is provided at the location of the pressure regulating block in the first pipeline. The mating hole is oblong. The pressure regulating block can move along the radial direction of the first pipeline inside the first pipeline, changing the overlap area between the mating hole and the pressure regulating hole.

[0010] Furthermore, a connecting rope is provided in the circumferential direction of the outer cylinder, and an adjusting rod is fixedly connected to each pressure regulating block. The adjusting rod is arranged in the radial direction of the first pipeline, and the adjusting rod passes through the first pipeline and the outer cylinder in sequence in the radial direction of the first pipeline before abutting against the connecting rope. A first elastic element is provided between the adjusting rod and the outer cylinder. The first elastic element is arranged in the radial direction of the first pipeline. In the initial state, the first elastic element is under pressure. A first hydraulic cylinder is provided on the outer cylinder, and the connecting rope connects the first hydraulic cylinder and the outer cylinder.

[0011] Furthermore, a groove is provided at the end of the adjusting rod that abuts against the connecting rope, and the connecting rope slides into the groove.

[0012] Furthermore, the outer cylinder is mounted on the base via a support seat, and the outer cylinder is hinged to the support seat. A driving component is provided on the support seat, which enables the outer cylinder to rotate relative to the support seat around a second direction, which is horizontal and perpendicular to the first direction.

[0013] Furthermore, the support base can rotate relative to the base in a vertical direction.

[0014] This invention also provides a control method for a spray dust suppression device in a fully mechanized coal mining face, comprising the following steps:

[0015] S10, Adjust the orientation of the spray nozzle so that the third end of the inner cylinder and the second end of the outer cylinder are aligned with the working surface;

[0016] S20, activate the flow regulator to allow water to flow from the first pipeline to multiple first nozzles and from the second pipeline to multiple second nozzles;

[0017] S30 regulates the flow rate of water discharged through the two outlets per unit time using a flow regulator.

[0018] The beneficial effects of this invention are as follows: The spray dust suppression device for a fully mechanized coal mining face of this invention uses a double-sleeve structure with an inner and outer cylinder that cooperate with each other. The atomization angle of the first nozzle on the first spray element is greater than that of the second nozzle on the second spray element. Furthermore, the first nozzle of the first spray element is positioned on the side furthest from the working face relative to the second nozzle of the second spray element. This allows the first nozzle to have a shorter range but a relatively larger mist coverage area, enabling it to achieve wide-area dust suppression. This effectively creates a large isolation space, separating workers from the dust and reducing the harm caused by small-particle respirable dust. Conversely, the second nozzle has a longer range but a relatively smaller mist coverage area, allowing it to achieve full-distance dust suppression, removing dust between the second nozzle and the working face, thus improving the dust suppression effect. Dust that the second spray element fails to remove is further removed by the first spray element after moving to it, ensuring the quality of dust suppression. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a spray dust removal device for a fully mechanized coal mining face according to the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a front view of the overall structure of an embodiment of a spray dust suppression device for a fully mechanized coal mining face according to the present invention;

[0023] Figure 4 for Figure 3 A cross-sectional view along the BB direction;

[0024] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0025] Figure 6 for Figure 4 Enlarged view at point D;

[0026] Figure 7This is a cross-sectional view of the overall structure of an embodiment of a spray dust removal device for a fully mechanized coal mining face according to the present invention;

[0027] Figure 8 for Figure 7 Enlarged view at point E in the middle;

[0028] Figure 9 for Figure 7 Enlarged view at point F;

[0029] Figure 10 This is a diagram showing the state of the pressure regulating block after adjustment in an embodiment of a spray dust removal device for a fully mechanized coal mining face according to the present invention.

[0030] Figure 11 This is a cross-sectional view of the first spray component of an embodiment of a spray dust suppression device for a fully mechanized coal mining face according to the present invention;

[0031] Figure 12 for Figure 11 A magnified view of point G in the middle.

[0032] In the diagram: 100, base; 110, second motor; 111, main gear; 200, spray nozzle; 210, inner... cylinder ; 211. Rotating fan blades; 212. First motor; 220. Outer cylinder; 230. First spray component; 231. First nozzle; 232. First pipeline; 233. Pressure regulating block; 234. Pressure regulating hole; 235. Mating hole; 236. Adjusting rod; 237. First elastic element; 238. First hydraulic cylinder; 240. Second spray component; 241. Second nozzle; 242. Second pipeline; 243. Atomization angle; 250. Flow space; 260. Flow regulating component; 261. Housing; 262. Flow regulating valve; 263. Adjusting knob; 264. Water inlet; 265. Water outlet; 266. Baffle; 267. First flow chamber; 268. Second flow chamber; 269. Adjusting shaft; 270. Connecting pipe; 280. Connecting rope; 300. Support base; 310. Driving component; 320. Driven gear. Detailed Implementation

[0033] 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.

[0034] An embodiment of the spray dust suppression device for a fully mechanized coal mining face according to the present invention is as follows: Figures 1 to 12 As shown.

[0035] A spray dust suppression device for a fully mechanized coal mining face includes a base 100 and a spray cylinder 200. The spray cylinder 200 is mounted on the base 100 and includes an inner cylinder 210 and an outer cylinder 220. The two ends of the outer cylinder 220 along its axial direction are respectively referred to as the first end and the second end. The first end of the outer cylinder 220 is sealed, and the second end is open. A first spray element 230 is provided on the outer cylinder 220, located on one side of the second end. The first spray element 230 includes multiple first nozzles 231, which are evenly distributed around the axial direction of the outer cylinder 220. The axial direction of the outer cylinder 220 is referred to as the first direction, and the first direction is horizontal. The inner cylinder 210 is coaxially arranged with the outer cylinder 220 and fixed inside the outer cylinder 220. The two ends of the inner cylinder 210 in the first direction are respectively referred to as the third end and the fourth end, and the third end and the fourth end of the inner cylinder 210 are connected in the first direction. The first end, the fourth end, the second end, and the third end are arranged sequentially in the first direction, with the first end located on the side of the third end away from the working surface in the first direction. A second spray element 240 is provided on the inner cylinder 210, located on one side of the third end. The second spray element 240 includes multiple second nozzles 241, which are evenly distributed around the axis of the inner cylinder 210. The atomization angle 243 of the first nozzle 231 is greater than the atomization angle 243 of the second nozzles 241.

[0036] Specifically, both the first nozzle 231 and the second nozzle 241 are pressure nozzles. Pressure nozzles are existing technology. Pressure nozzles only have a liquid inlet. After a liquid with a certain pressure enters the first nozzle 231 and the second nozzle 241 through the liquid inlet, the pressure potential energy of the liquid is converted into kinetic energy, and finally the droplets are ejected at high speed.

[0037] In this embodiment, the spray cylinder 200 is configured as a double-sleeve structure with an inner cylinder 210 and an outer cylinder 220 cooperating with each other. In use, the third end of the inner cylinder 210 and the second end of the outer cylinder 220 are oriented towards the working surface, and the first spray element 230 and the second spray element 240 are activated to remove dust. According to common knowledge, when the water supply pressure is the same, the nozzle with a larger atomization angle 243 has a shorter range, but can widen the coverage of the mist, that is, the spray range is wider. On the other hand, the nozzle with a smaller atomization angle 243 can achieve a longer range, but the coverage of the mist is relatively narrower.

[0038] Therefore, the atomization angle 243 of the first nozzle 231 of the first spray component 230 is greater than that of the second nozzle 241 of the second spray component 240. Furthermore, the first nozzle 231 of the first spray component 230 is positioned on the side furthest from the working surface relative to the second nozzle 241 of the second spray component 240. This allows the first nozzle 231 to have a shorter range but a relatively larger mist coverage area, enabling it to achieve wide-area dust removal. This effectively creates a large isolation space, separating workers from the dust and reducing the harm caused by small-particle respirable dust. Conversely, the second nozzle 241 has a longer range but a relatively smaller mist coverage area, allowing it to achieve full-distance dust removal, eliminating dust between the second nozzle 241 and the working surface, thus improving dust removal efficiency. Dust that the second spray component 240 fails to remove will be further removed by the first spray component 230 after moving to it, ensuring the quality of dust removal.

[0039] In a further embodiment, a flow space 250 is defined between the outer cylinder 220 and the inner cylinder 210. A rotating fan blade 211 is rotatably disposed inside the inner cylinder 210. The rotation of the rotating fan blade 211 enables airflow to enter the flow space 250 from the second end of the outer cylinder 220, and then enter the inner cylinder 210 from the fourth end within the flow space 250, and finally exit from the third end of the inner cylinder 210.

[0040] Specifically, a grid plate is provided on the inner cylinder 210, and the grid plate is located on one side of the fourth end of the inner cylinder 210. A first motor 212 is fixedly provided on the outer cylinder 220. The output shaft of the first motor 212 is arranged along the first direction. The output shaft of the first motor 212 passes through the grid plate on the outer cylinder 220 and the inner cylinder 210 in sequence along the first direction and is fixedly connected to the rotating fan blade 211.

[0041] When the first nozzle 231 of the first spray element 230 and the second nozzle 241 of the second spray element 240 are performing dust removal, the first motor 212 is simultaneously started to drive the rotating fan blade 211 to rotate. The rotating fan blade 211 causes the airflow to enter the flow space 250 from the second end of the outer cylinder 220 and enter the inner cylinder 210 from the fourth end, and finally exit from the third end of the inner cylinder 210, spraying water mist and further expanding the range of the water mist. When the airflow enters the flow space 250 from the second end of the outer cylinder 220, the dust carried in the airflow will be initially removed by the first nozzle 231 of the first spray element 230 when passing through it, reducing the proportion of dust in the airflow, improving the quality of the airflow finally exiting from the third end of the inner cylinder 210, and reducing the probability of dust in the airflow clogging the first nozzle 231 and the second nozzle 241.

[0042] In a further embodiment, the first spray element 230 further includes a first pipe 232, which is disposed on the inner peripheral wall of the outer cylinder 220 and coaxial with the outer cylinder 220. A plurality of first nozzles 231 are evenly distributed around the axis of the first pipe 232 and are all connected to the first pipe 232. The second spray element 240 further includes a second pipe 242, which is disposed on the inner peripheral wall of the inner cylinder 210 and coaxial with the inner cylinder 210. A plurality of second nozzles 241 are evenly distributed around the axis of the second pipe 242 and are all connected to the second pipe 242. A flow regulating element 260 is provided on the base 100. The flow regulating element 260 has an inlet 264 and two outlets 265. The inlet 264 is connected to an external water pump. Both the first pipe 232 and the second pipe 242 have a structure with one end closed and the other end open. The two outlets 265 are connected to the openings on the first pipe 232 and the second pipe 242 respectively via the connecting pipe 270. The flow regulating component 260 can regulate the flow rate of water discharged through the two outlets 265 per unit time.

[0043] The flow regulating component 260 includes a housing 261, a flow regulating valve 262, and an adjusting knob 263. The housing 261 is mounted on the base 100. An inlet 264 and two outlets 265 are located on the housing 261. A partition 266 is disposed inside the housing 261, positioned between the two outlets 265. The flow regulating valve 262 is located inside the housing 261 and slides in a seal with the housing 261 and the partition 266. The flow regulating valve 262 has multiple flow ports. A first flow chamber 267 and a second flow chamber 268 are defined between the housing 261, the partition 266, and the flow regulating valve 262. The two outlets 265 communicate with the first flow chamber 267 and the second flow chamber 268, respectively. The adjusting knob 263 is located outside the housing 261 and connected to the flow regulating valve 262 via an adjusting shaft 269, which is screwed to the housing 261.

[0044] This embodiment, by setting up a first pipeline 232, a second pipeline 242, and a flow regulating component 260, allows for adjustment of the water flow rate at the two outlets 265 of the flow regulating component 260 according to the distance from the entire dust removal equipment to the working surface. This, in turn, changes the amount of water mist sprayed from the first nozzle 231 of the first spray component 230 and the second nozzle 241 of the second spray component 240. Specifically, when the entire dust removal equipment is close to the working surface, a large amount of dust accumulates near the equipment. To improve the isolation effect between dust and workers and expand the mist coverage, the spray ratio of the first nozzle 231 can be increased. Furthermore, since the dust removal equipment is close to the working surface, the second nozzle 241 does not need to spray a long distance, thus reducing its spray ratio.

[0045] The specific adjustment process is as follows: Rotating the adjustment knob 263 causes the adjustment shaft 269 to rotate, which in turn drives the flow control valve 262 to rotate and move within the housing 261, changing the volumes of the first flow chamber 267 and the second flow chamber 268. When the first flow chamber 267 is connected to the first pipeline 232 and the second flow chamber 268 is connected to the second pipeline 242, the volume of the first flow chamber 267 is made larger than the volume of the second flow chamber 268. After adjustment, when water enters the housing 261, it will enter the flow regulating valve 262 and flow into the first flow chamber 267 and the second flow chamber 268. This makes the volume of the first flow chamber 267 larger than the volume of the second flow chamber 268. Consequently, the proportion of water mist sprayed from the first nozzle 231 increases as the water flows from the first flow chamber 267 to the first pipe 232, while the proportion of water mist sprayed from the second nozzle 241 decreases as the water flows from the second flow chamber 268 to the second pipe 242.

[0046] In a further embodiment, a plurality of pressure regulating blocks 233 are provided inside the first pipeline 232. The plurality of pressure regulating blocks 233 and a plurality of first nozzles 231 are arranged sequentially around the axis of the first pipeline 232, and the pressure regulating blocks 233 and the first nozzles 231 are alternately distributed around the axis of the first pipeline 232. A pressure regulating hole 234 is provided on the pressure regulating block 233. The pressure regulating hole 234 is a trapezoidal hole. The two bottom sides of the pressure regulating hole 234 are referred to as the first side and the second side, respectively. The first side and the second side are arranged sequentially in the radial direction of the first pipeline 232. The first side is located on the side of the second side in the radial direction of the first pipeline 232 closer to the central axis of the first pipeline 232, and the size of the first side is smaller than the size of the second side. A mating hole 235 is provided at the first pipeline 232 where the pressure regulating block 233 is located. The mating hole 235 is an oblong hole. The pressure regulating block 233 can move in the first pipeline 232 along the radial direction of the first pipeline 232, changing the overlap area between the mating hole 235 and the pressure regulating hole 234.

[0047] The outer cylinder 220 is provided with a connecting rope 280 in the circumferential direction. Each pressure regulating block 233 is fixedly connected with an adjusting rod 236, and the adjusting rod 236 and the pressure regulating block 233 are integrally formed. The adjusting rod 236 is arranged in the radial direction of the first pipe 232, and passes through the first pipe 232 and the outer cylinder 220 in sequence before abutting against the connecting rope 280. A first elastic element 237 is provided between the adjusting rod 236 and the outer cylinder 220. The first elastic element 237 is arranged in the radial direction of the first pipe 232 and is a compression spring. In the initial state, the first elastic element 237 is under pressure. A first hydraulic cylinder 238 is provided on the outer cylinder 220. One end of the connecting rope 280 is connected to the output end of the first hydraulic cylinder 238, and the other end of the connecting rope 280 is connected to the outer cylinder 220. The two ends of the connecting rope 280 are staggered on the outer cylinder 220.

[0048] Specifically, a groove is provided at the end of the adjusting rod 236 that abuts against the connecting rope 280, and the connecting rope 280 slides in the groove. The groove limits the movement of the connecting rope 280, preventing it from disengaging from the adjusting rod 236.

[0049] In this embodiment, by using a pressure regulating block 233 and an adjusting rod 236 in conjunction, the size of the spray particles emitted through the first nozzle 231 can be adjusted according to the distance between the entire dust removal equipment and the working surface during use. Specifically, when the entire dust removal equipment is close to the working surface, the total amount of dust particles is large and the particle size distribution is uneven, containing both large and small diameter particles. When the entire dust removal equipment is far from the working surface, most of the dust particles are small diameter particles.

[0050] Based on the formula relating dust particle size to spray particle size: = .

[0051] in, The minimum particle size for dust collection by spray; Aerodynamic viscosity; The droplet size; The inertial collision coefficient; Dust particle size; Let be the airflow velocity. It can be seen that during spray dust suppression, the minimum particle size of dust collected by the spray is directly proportional to the droplet size; that is, when the droplet size is close to the dust particle size, the dust removal efficiency will also improve.

[0052] Based on the formula relating droplet size and spray pressure: = .

[0053] in, Laboratory coefficient; The diameter of the spray outlet; Let be the spray pressure. It can be seen that, assuming no change in external conditions, the size of the sprayed droplets is inversely proportional to the spray pressure; that is, the higher the spray pressure, the smaller the droplet size.

[0054] Therefore, in order to improve dust removal efficiency, appropriately changing the size of the spray droplets helps to remove dust more quickly. Thus, when the entire dust removal equipment is close to the working surface, in order to remove both large and small diameter dust particles, the first hydraulic cylinder 238 can be activated, thereby loosening the connecting rope 280. Driven by the first elastic element 237, the adjusting rod 236 drives the pressure regulating block 233 to move radially within the first pipe 232, reducing the overlap area between the mating hole 235 and the oblong hole. As a result, when water enters the first pipe 232, as water passes from one first nozzle 231 through the pressure regulating block 233 to the other first nozzle 231, the adjusted pressure regulating block 233 will create a pressure difference between the two adjacent first nozzles 231, changing the size of the spray droplets between the two adjacent first nozzles 231. This results in sprayed droplets of varying sizes, which can be adapted to dust particles of different sizes, thus improving the quality of dust removal. When the dust removal equipment is far from the working surface, most of the dust particles are small-diameter particles. At this time, there is no need to adjust the pressure regulating block 233. Simply increase the inlet water pressure to change the size of the spray droplets, so that the sprayed droplets can match the small-diameter dust particles and further improve the dust removal quality.

[0055] In a further embodiment, the outer cylinder 220 is mounted on the base 100 via a support 300. The outer cylinder 220 is hinged to the support 300. A driving member 310 is provided on the support 300. The driving member 310 enables the outer cylinder 220 to rotate relative to the support 300 about a second direction, which is horizontal and perpendicular to the first direction.

[0056] The driving component 310 is a second hydraulic cylinder. In use, the driving component 310 can drive the outer cylinder 220 to rotate relative to the support base 300 in a second direction. The rotation of the outer cylinder 220 will drive the inner cylinder 210 to rotate, thereby changing the spray direction of the first nozzle 231 and the second nozzle 241, increasing the spray range and further improving the dust removal effect.

[0057] In a further embodiment, the support 300 is rotatable relative to the base 100 about a vertical direction. A flow regulator 260 is mounted on the support 300. The housing 261 of the flow regulator 260 is fixedly connected to the support 300.

[0058] The base 100 is equipped with a second motor 110, the output end of the second motor 110 is equipped with a main gear 111, and the support 300 is equipped with a driven gear 320, with the main gear 111 meshing with the driven gear 320.

[0059] By enabling the support base 300 to rotate relative to the base 100 in a vertical direction, the orientation of the first nozzle 231 and the second nozzle 241 can be changed, thereby achieving multi-directional spraying.

[0060] Based on the above embodiments, the specific working process is as follows:

[0061] When in use, the third end of the inner cylinder 210 and the second end of the outer cylinder 220 should face the working surface, and the water pump should be started. When the water flows into the housing 261, it will enter the flow regulating valve 262 and flow into the first flow chamber 267 and the second flow chamber 268. Finally, it will be sprayed out from the first nozzle 231 and the second nozzle 241 through the connecting pipe 270. The atomization angle 243 of the first nozzle 231 of the first spray component 230 is greater than that of the second nozzle 241 of the second spray component 240. Furthermore, the first nozzle 231 of the first spray component 230 is positioned on the side furthest from the working surface from the second nozzle 241 of the second spray component 240. This allows the first nozzle 231 to have a shorter range but a relatively larger mist coverage area, enabling it to achieve wide-area dust removal. This effectively creates a large isolation space, separating workers from the dust and reducing the harm caused by small-particle respirable dust. Conversely, the second nozzle 241 has a longer range but a relatively smaller mist coverage area, allowing it to achieve full-distance dust removal, eliminating dust between the second nozzle 241 and the working surface, thus improving dust removal efficiency. Dust that the second spray component 240 fails to remove will be further removed by the first spray component 230 after moving to it, ensuring the quality of dust removal.

[0062] When the first nozzle 231 of the first spray element 230 and the second nozzle 241 of the second spray element 240 are performing dust removal, the first motor 212 is simultaneously started to drive the rotating fan blade 211 to rotate. The rotating fan blade 211 causes the airflow to enter the flow space 250 from the second end of the outer cylinder 220 and enter the inner cylinder 210 from the fourth end, and finally exit from the third end of the inner cylinder 210, spraying water mist and further expanding the range of the water mist. When the airflow enters the flow space 250 from the second end of the outer cylinder 220, the dust carried in the airflow will be initially removed by the first nozzle 231 of the first spray element 230 when passing through it, reducing the proportion of dust in the airflow, improving the quality of the airflow finally exiting from the third end of the inner cylinder 210, and reducing the probability of dust in the airflow clogging the first nozzle 231 and the second nozzle 241.

[0063] Furthermore, during use, the water flow rate of the two outlets 265 of the flow regulating component 260 can be adjusted according to the distance between the entire dust removal equipment and the working surface, thereby changing the amount of water mist sprayed by the first nozzle 231 of the first spray component 230 and the second nozzle 241 of the second spray component 240. Specifically, when the entire dust removal equipment is close to the working surface, there is a lot of dust accumulating near the dust removal equipment. In order to improve the isolation effect between dust and workers and expand the coverage of the mist, the spray ratio of the first nozzle 231 can be increased. Since the dust removal equipment is close to the working surface, the second nozzle 241 does not need to spray a long distance, so the spray ratio of the second nozzle 241 can be reduced.

[0064] The specific adjustment process is as follows: Rotating the adjustment knob 263 causes the adjustment shaft 269 to rotate, which in turn drives the flow control valve 262 to rotate and move within the housing 261, changing the volumes of the first flow chamber 267 and the second flow chamber 268. When the first flow chamber 267 is connected to the first pipeline 232 and the second flow chamber 268 is connected to the second pipeline 242, the volume of the first flow chamber 267 is made larger than the volume of the second flow chamber 268. After adjustment, when water enters the housing 261, it will enter the flow regulating valve 262 and flow into the first flow chamber 267 and the second flow chamber 268. This makes the volume of the first flow chamber 267 larger than the volume of the second flow chamber 268. Consequently, the proportion of water mist sprayed from the first nozzle 231 increases as the water flows from the first flow chamber 267 to the first pipe 232, while the proportion of water mist sprayed from the second nozzle 241 decreases as the water flows from the second flow chamber 268 to the second pipe 242.

[0065] Meanwhile, when the entire dust removal equipment is close to the working surface, in order to remove both large and small diameter dust particles, the first hydraulic cylinder 238 can be activated, thereby loosening the connecting rope 280. Driven by the first elastic element 237, the adjusting rod 236 drives the pressure regulating block 233 to move radially within the first pipe 232, reducing the overlap area between the mating hole 235 and the oblong hole. As a result, when water enters the first pipe 232, as water passes from one first nozzle 231 through the pressure regulating block 233 to the other first nozzle 231, the adjusted pressure regulating block 233 will create a pressure difference between the two adjacent first nozzles 231 and change the size of the spray droplets between the two adjacent first nozzles 231, so that the sprayed droplets have different sizes, which can be adapted to dust particles of different sizes, thus improving the quality of dust removal. When the dust removal equipment is far from the working surface, most of the dust particles are small-diameter particles. At this time, there is no need to adjust the pressure regulating block 233. Simply increase the inlet water pressure to change the size of the spray droplets, so that the sprayed droplets can match the small-diameter dust particles and further improve the dust removal quality.

[0066] This invention also provides a control method for a spray dust suppression device in a fully mechanized coal mining face, comprising the following steps:

[0067] S10, adjust the orientation of the spray cylinder 200 so that the third end of the inner cylinder 210 and the second end of the outer cylinder 220 are aligned with the working surface.

[0068] S20, activate the flow regulator 260 to make water flow from the first pipe 232 to multiple first nozzles 231, and from the second pipe 242 to multiple second nozzles 241.

[0069] S30, the flow rate of water discharged through the two outlets 265 per unit time is adjusted by the flow regulating component 260.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal mine fully mechanized working face spray dust removal equipment, characterized in that: The system includes a base and a spray cylinder. The spray cylinder is mounted on the base and includes an inner cylinder and an outer cylinder. The two ends of the outer cylinder along its axial direction are referred to as the first end and the second end, respectively. The first end of the outer cylinder is sealed, and the second end is open. A first spray element is mounted on the outer cylinder, located to one side of the second end. The first spray element includes multiple first nozzles evenly distributed around the axial direction of the outer cylinder. The axial direction of the outer cylinder is referred to as the first direction, which is horizontal. The inner cylinder is coaxially mounted with the outer cylinder and fixed inside the outer cylinder. The two ends of the inner cylinder in the first direction are referred to as the third end and the fourth end, respectively. The third and fourth ends of the inner cylinder are connected in the first direction. The first end, fourth end, second end, and third end are arranged sequentially in the first direction, with the first end located on the side of the third end away from the working surface in the first direction. The upper part is provided with a second spraying component, which is located on one side of the third end. The second spraying component includes multiple second nozzles, which are evenly distributed around the axis of the inner cylinder. The atomization angle of the first nozzle is greater than that of the second nozzle. The first spraying component also includes a first pipeline, which is disposed on the inner peripheral wall of the outer cylinder and is coaxial with the outer cylinder. Multiple first nozzles are evenly distributed around the axis of the first pipeline and are all connected to the first pipeline. The second spraying component also includes a second pipeline, which is disposed on the inner peripheral wall of the inner cylinder and is coaxial with the inner cylinder. Multiple second nozzles are evenly distributed around the axis of the second pipeline and are all connected to the second pipeline. The base is provided with a flow regulating component, which has an inlet and two outlets. The inlet is connected to an external water pump. Both the first pipeline and the second pipeline have a structure with one end closed and the other end open. The two outlets are connected to the openings on the first and second pipelines respectively through connecting pipes, and the flow regulating component can regulate the flow rate of water discharged through the two outlets per unit time. The flow regulating component includes a housing, a flow regulating valve, and a regulating knob; the housing is mounted on a base, and the inlet and two outlets are all located on the housing. A baffle is installed inside the housing, and the baffle is located between the two outlets; the flow regulating valve is located inside the housing and slides and seals with the housing and the baffle, and the flow regulating valve has multiple flow ports. The housing, the partition, and the flow control valve define a first flow chamber and a second flow chamber, and two outlets are connected to the first flow chamber and the second flow chamber, respectively; the adjustment knob is located outside the housing and is connected to the flow control valve through the adjustment shaft, and the adjustment shaft is screwed to the housing.

2. The coal mine fully mechanized mining face spraying dust removal equipment according to claim 1, characterized in that: A flow space is defined between the outer cylinder and the inner cylinder. A rotating fan blade is installed inside the inner cylinder. The rotation of the fan blade allows the airflow to enter the flow space from the second end of the outer cylinder, and then enter the inner cylinder from the fourth end within the flow space, and finally exit from the third end of the inner cylinder.

3. The spray dust suppression device for a fully mechanized coal mining face according to claim 1, characterized in that: Multiple pressure regulating blocks are installed inside the first pipeline. The multiple pressure regulating blocks and multiple first nozzles are arranged sequentially around the axis of the first pipeline, and the pressure regulating blocks and first nozzles are alternately distributed around the axis of the first pipeline. The pressure regulating blocks are provided with pressure regulating holes, which are trapezoidal holes. The first pipeline where the pressure regulating block is located is provided with mating holes, which are oblong holes. The pressure regulating blocks can move along the radial direction of the first pipeline, changing the overlap area between the mating holes and the pressure regulating holes.

4. The coal mine fully mechanized mining face spraying dust removal equipment according to claim 3, characterized in that: A connecting rope is provided in the circumferential direction of the outer cylinder. An adjusting rod is fixedly connected to each pressure regulating block. The adjusting rod is arranged in the radial direction of the first pipeline. The adjusting rod passes through the first pipeline and the outer cylinder in sequence in the radial direction of the first pipeline and then abuts against the connecting rope. A first elastic element is provided between the adjusting rod and the outer cylinder. The first elastic element is arranged in the radial direction of the first pipeline. In the initial state, the first elastic element is under pressure. A first hydraulic cylinder is provided on the outer cylinder. The connecting rope connects the first hydraulic cylinder and the outer cylinder.

5. The coal mine fully mechanized mining face spraying dust removal equipment according to claim 4, characterized in that: The end of the adjusting rod that abuts against the connecting rope has a groove, and the connecting rope slides into the groove.

6. The coal mine fully mechanized mining face spraying dust removal equipment according to claim 1, characterized in that: The outer cylinder is mounted on the base via a support seat. The outer cylinder is hinged to the support seat. A driving component is provided on the support seat. The driving component enables the outer cylinder to rotate relative to the support seat around a second direction. The second direction is horizontal and perpendicular to the first direction.

7. A spray dust suppression device for a fully mechanized coal mining face according to claim 6, characterized in that: The support base can rotate relative to the base in a vertical direction.

8. A control method of a spray dust removal device of a fully mechanized coal mining face, using the spray dust removal device of the fully mechanized coal mining face according to claim 1, characterized in that: Includes the following steps: S10, Adjust the orientation of the spray nozzle so that the third end of the inner cylinder and the second end of the outer cylinder are aligned with the working surface; S20, activate the flow regulator to allow water to flow from the first pipeline to multiple first nozzles and from the second pipeline to multiple second nozzles; S30 regulates the flow rate of water discharged through the two outlets per unit time using a flow regulator.

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