Ventilation device for coal mine

Abstract

The invention relates to the technical field of coal mine operation, in particular to a coal mine ventilation device which comprises a machine shell internally provided with a cavity and an axial flow fan arranged in the machine shell and used for driving gas to flow and further comprises a plurality of triangular filter screens fixedly connected into the cavity of the machine shell in a staggered mode. A water tank storing water is fixedly connected to the interior of the machine shell, one side of the water tank communicates with a plurality of water pipes, soft through pipes made of rubber are arranged in the multiple water pipes, and water spraying assemblies used for draining water are arranged in sleeves; and the dust collection plate is uniformly and rotationally connected to one side of each sleeve and used for adsorbing dust in the air. Two-way airflow circulation achieves self-cleaning, water mist and dust are combined, the weight is increased, sedimentation is accelerated, and the water mist and the dust are adsorbed by the dust suction plate to wet the filter screen.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine operations, and particularly to a ventilation device for coal mines. Background Art

[0002] With the increase in coal mining depth and the improvement of mechanization level, the dust concentration in the underground working environment has increased sharply, becoming an important hidden danger for coal mine safety production. Coal dust not only threatens the respiratory health of miners (such as causing pneumoconiosis), but may also cause gas and coal dust explosions when reaching the explosion limit (the concentration of suspended coal dust in the air is 5% - 15%), resulting in heavy casualties and property losses. Therefore, coal mine ventilation technology is one of the core topics for ensuring mine safety and improving the working environment.

[0003] For example, in the patent document with the prior art publication number CN218030270U, this patent document discloses a ventilation and dust removal device for coal mine operations, specifically related to the technical field of coal mine operation equipment. Aiming at the problem that during the use of coal mine operation dust removal equipment, since a filtration structure is usually used for dust removal and the filtration structure is prone to blockage and requires manual cleaning, resulting in time-consuming and laborious maintenance of the dust removal equipment, the following solution is now proposed. It includes a support box for ventilation and dust removal in coal mine operations. The cavity of the support box is divided into a functional cavity for ventilation and dust removal and a storage cavity for storing dust. The functional cavity is located above the storage cavity and is in communication. Through holes communicating with the functional cavity are opened on both the left and right sides of the support box. A first fan for sucking air in the coal mine into the functional cavity is fixedly installed on the inner wall of one of the through holes. The structure of this patent document is novel, not only improving the dust removal efficiency but also having an automatic cleaning function for the filter net, and is suitable for popularization.

[0004] Although the above prior art realizes the preliminary cleaning function for the flat filter net by configuring a double - fan system, its limitations gradually appear in actual application scenarios. Specifically, due to its structural design, the flat filter net often has a relatively high filtration resistance. When the system requires a high - flow velocity of air to meet the more efficient air purification requirements, the flat filter net will become a bottleneck for the improvement of air velocity, significantly inhibiting the air velocity circulation efficiency. More critically, the surface characteristics of the flat filter net cause dust particles to have a strong adhesion force, which not only accelerates the saturation of the filter net's filtering capacity but also enables the filter net to reach the limit of its filtering capacity in a relatively short time, thereby reducing the sustainability and effectiveness of the overall air purification system. For this reason, this application proposes a ventilation device for coal mines. Summary of the Invention

[0005] The purpose of the present invention is to provide a ventilation device for coal mines to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A ventilation device for coal mines, including a casing with a cavity inside and an axial flow fan arranged inside for driving gas flow, further including:

[0007] Triangular filters, which are constructed in multiple numbers and are fixedly connected in a staggered manner in the cavity of the casing. A water tank storing water is fixedly connected inside the casing, and one side of the water tank is communicated with a plurality of water pipes. Inside each of the plurality of water pipes, there is a flexible pipe made of rubber, and a water spraying assembly for draining water is arranged inside the sleeve;

[0008] A dust suction plate, which is evenly rotatably connected to one side of a plurality of sleeves and is used for adsorbing dust in the air;

[0009] An air tank, which is fixedly connected to the top of the casing and stores inert gas inside. The air outlet end of the air tank is communicated with a plurality of exhaust pipes, and the plurality of exhaust pipes extend into the casing and are provided with a plurality of exhaust balls. A discharge assembly for releasing the inert gas in the air tank in cooperation with the air flow is arranged at the top of the exhaust ball.

[0010] Preferably, a driving motor is fixedly connected inside the casing, the output shaft of the driving motor is fixedly connected with a driving shaft for driving the axial flow fan to rotate, and one side of the casing is communicated with a straight pipe adapted to the axial flow fan.

[0011] Preferably, the water spraying assembly includes a rotating shaft arranged inside the sleeve. A plurality of extrusion rollers are evenly arranged on the outer surface of the rotating shaft, and each of the plurality of extrusion rollers abuts against the flexible pipe. A plurality of hollow drain pipes are communicated with the outer surface of the flexible pipe, and a plurality of push-pull levers are rotatably connected inside the flexible pipe, and one end of each of the plurality of push-pull levers is rotatably connected with a closing plug adapted to the drain pipe.

[0012] Preferably, a plurality of brackets for supporting the rotating shaft are fixedly connected inside the casing, and a plurality of turbine blades are fixedly connected to the outer surface of each of the plurality of rotating shafts. A plurality of positioning plates are fixedly connected to the outer surface of the rotating shaft. On one side of each of the plurality of positioning plates, there is an installation seat for supporting the extrusion roller, and a displacement sliding rod slidably connected with the installation seat is fixedly connected inside the positioning plate, and a tension spring for driving the installation seat to reset is sleeved on the outer surface of the displacement sliding rod.

[0013] Preferably, a torsion spring rotating rod is rotatably connected to one side of the sleeve, and a seesaw plate that can abut against the dust suction plate is fixedly connected to one side of the torsion spring rotating rod. A flexible strip is fixedly connected to one side of the installation seat, and a trigger rod is fixedly connected to one side of the seesaw plate.

[0014] Preferably, the discharge assembly includes a connecting seat fixedly connected to the top of the exhaust ball. The bottom of the exhaust pipe is rotatably connected with a hollow rotating rod with a hollow interior, and the hollow rotating rod is fixedly connected with the connecting seat.

[0015] Preferably, a communication groove is formed on the outer surface of the hollow rotating rod, and a one-way valve is fixedly connected to the air outlet end of the air tank.

[0016] Preferably, a filter housing is provided at one end of the machine shell away from the straight tube, and a plurality of branch pipes that can communicate with the machine shell are communicated on one side of the filter housing.

[0017] Preferably, a filter screen is fixedly connected to one side of the filter housing.

[0018] Preferably, one ends of the plurality of water pipes all extend to the outer surface of the machine shell.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. Two-way air flow circulation realizes self-cleaning: In the forward ventilation (filtering mode), the air flow enters from the filter housing, passes through the triangular filter screen and is discharged through the straight tube after being filtered. The dust is intercepted by the triangular filter screen. The water spraying assembly wets the filter screen and increases the weight of the dust. The dust suction plate adsorbs the dust mixed with water to improve the filtering efficiency; In the reverse ventilation (self-cleaning mode), the air flow is sucked back from the straight tube, reversely flushes the dust attached to the surface through the triangular filter screen, and finally is discharged from the filter housing. The dust accumulated on the filter screen can be removed without manual intervention, the service life is prolonged, and the maintenance cost is reduced; The forward air flow drives the turbine blades to rotate, driving the extrusion roller to periodically extrude the flexible tube to form a negative pressure to suck the water in the water tank, and intermittently spray water through the drain pipe. The weight of the water mist combined with the dust increases, accelerating sedimentation and being adsorbed by the dust suction plate to wet the filter screen: The water adheres to the triangular filter screen, improving its dust loading capacity, preventing blockage, and using the kinetic energy of the air flow to drive water spraying without an independent water pump, saving energy; The triangular staggered arrangement increases the gas contact area, cuts the air flow to reduce the resistance, and physically intercepts: The dust is directly blocked by the filter screen. When the air flow changes direction, the dust breaks away from the air flow path due to inertia, and the fine particles diffuse and settle between the filter screen fibers; During the forward air flow, the flexible strip pushes the dust suction plate to lift, expanding the contact area; During the reverse air flow, the gas flushes the dust suction plate to remove the accumulated dust. The dual adsorption (adsorption after water spraying to increase dust + direct interception) improves the overall dust removal efficiency.

[0021] 2. The gas cylinder stores inert gases such as nitrogen and carbon dioxide, which are released into the cavity of the casing through the exhaust pipe. Since the density of methane is lower than that of air, it will accumulate in the upper channel of the casing; after the inert gas is released, it diffuses upward to cover the methane area, diluting its concentration below the lower explosion limit. The air flow enters from the filter casing, flows upward after passing through the triangular filter screen, blows the exhaust balloon to tilt, drives the hollow rotating rod to rotate, aligns the communication groove with the exhaust pipe, and the inert gas in the gas cylinder flows into the exhaust balloon through the one-way valve and is released. During reverse ventilation, the air flow is inhaled reversely from the straight pipe. The exhaust balloon is not blown, the communication groove deviates from the exhaust pipe, and the release of the inert gas stops, avoiding waste. The area near the straight pipe in the casing is divided into upper and lower channels. During forward air flow, the dust sinks to the lower channel, the methane accumulates in the upper channel, and the inert gas accurately covers the methane enrichment area. Brief Description of the Drawings

[0022] Figure 1 is the first three-dimensional structure schematic diagram of the present invention;

[0023] Figure 2 is the second three-dimensional structure schematic diagram of the present invention;

[0024] Figure 3 is the cross-sectional structure schematic diagram of the present invention;

[0025] Figure 4 is the cross-sectional structure schematic diagram of the casing in the present invention;

[0026] Figure 5 is the structure schematic diagram of the triangular filter screen in the present invention;

[0027] Figure 6 is the structure schematic diagram of the sleeve in the present invention;

[0028] Figure 7 is the cross-sectional structure schematic diagram of the flexible pipe in the present invention;

[0029] Figure 8 of the present invention Figure 7 is the enlarged schematic diagram of the structure at A;

[0030] Figure 9 is the structure schematic diagram of the dust suction plate in the present invention;

[0031] Figure 10 is the structure schematic diagram of the exhaust pipe in the present invention;

[0032] Figure 11 is the cross-sectional structure schematic diagram of the exhaust balloon in the present invention.

[0033] In the figure: 100, housing; 101, straight tube; 102, branch pipe; 103, filter housing; 104, drive motor; 105, drive shaft; 106, axial flow fan; 200, triangular filter screen; 201, water tank; 202, water pipe; 203, rotating shaft; 204, turbine blade; 205, bracket; 206, sleeve; 207, flexible pipe; 208, discharge pipe; 209, extrusion roller; 210, closing plug; 211, push-pull lever; 212, mounting seat; 213, positioning plate; 214, misaligned slide bar; 215, tension spring; 300, dust suction plate; 301, torsion spring rotating rod; 302, seesaw; 303, flexible strip; 304, trigger rod; 400, gas tank; 401, exhaust pipe; 402, check valve; 403, exhaust balloon; 404, connecting seat; 405, hollow rotating rod; 406, communication groove. Specific implementation manner

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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.

[0035] Embodiment 1: Please refer to Figure 1 , Figure 2 and Figure 3 , the present invention provides a technical solution: a ventilation device for coal mines, including a housing 100 with an internal cavity and an axial flow fan 106 arranged inside for driving gas flow. A drive motor 104 is fixedly connected inside the housing 100, and the output shaft of the drive motor 104 is fixedly connected with a drive shaft 105 for driving the axial flow fan 106 to rotate. One side of the housing 100 is communicated with a straight tube 101 adapted to the axial flow fan 106. One end of the housing 100 away from the straight tube 101 is provided with a filter housing 103. One side of the filter housing 103 is communicated with a plurality of branch pipes 102 that can be communicated with the housing 100. A filter screen is fixedly connected to one side of the filter housing 103. By setting the axial flow fan 106, air flow can be generated to suck air from the filter housing 103 and discharge it through the straight tube 101. At the same time, the drive motor 104 can operate the forward and reverse rotation of the axial flow fan 106 to form different air flow directions. Under normal ventilation, air is inhaled from the filter housing 103 and exhausted through the straight tube 101, which conforms to aerodynamics and reduces resistance. The housing 100 with an internal cavity is formed by welding high-strength steel plates, and the drive motor 104, axial flow fan 106, filter housing 103 and triangular filter screen 200 are integrated inside to form a compact modular design.

[0036] Furthermore, please refer to Figure 4 , Figure 5 andFigure 6 , further comprising a triangular filter screen 200, which is configured to be multiple and fixedly connected in a staggered manner within the cavity of the casing 100. A water storage tank 201 filled with water is fixedly connected inside the casing 100, and one side of the water storage tank 201 is communicated with a plurality of water pipes 202. One ends of the plurality of water pipes 202 all extend to the outer surface of the casing 100. Soft flexible pipes 207 made of rubber are arranged inside the plurality of water pipes 202, and a water spraying assembly for draining water is arranged inside the sleeve 206. By arranging the triangular filter screen 200, the airflow can be filtered. At the same time, there will be certain gaps between the multiple triangular filter screens 200 when they are staggered for the airflow to pass through, and since it is triangular, it can cut the gas, increasing its flow rate. At the same time, the triangle can produce a three-dimensional filtering effect, increasing the contact area between the gas and the triangular filter screen 200, improving the filtering effect without causing resistance to the airflow. The multiple triangular filter screens 200 are fixedly connected in a staggered manner in the casing 100 at an inclination angle of 60°, forming a honeycomb-like three-dimensional filtering layer, increasing the gas contact area by 200%, while reducing the airflow resistance. At the same time, the inclination angle of the triangular filter screen 200 also helps the inertial separation of dust, reducing the deposition on the filter screen surface, thereby maintaining a lower resistance.

[0037] Among them, the water spraying assembly includes a rotating shaft 203 arranged inside the sleeve 206. A plurality of extrusion rollers 209 are evenly arranged on the outer surface of the rotating shaft 203, and the plurality of extrusion rollers 209 are all in contact with the soft flexible pipe 207. A plurality of hollow drain pipes 208 are communicated with the outer surface of the soft flexible pipe 207. A plurality of push-pull levers 211 are rotatably connected inside the soft flexible pipe 207, and one ends of the plurality of push-pull levers 211 are all rotatably connected with a closing plug 210 adapted to the drain pipe 208. By arranging the water spraying assembly, water can be released to combine with the air, thereby increasing the dust in the air and making it fall. At the same time, the sprayed water will be blown by the flowing gas and thus adhere to the multiple triangular filter screens 200 together, thereby moistening the triangular filter screen 200, and thus improving the filtering load capacity of the triangular filter screen 200.

[0038] Please refer to Figure 7 、 Figure 8 and Figure 9, there are multiple brackets 205 fixedly connected inside the casing 100 for supporting the rotating shafts 203, and turbine blades 204 are fixedly connected to the outer surfaces of the multiple rotating shafts 203. Positioning plates 213 are fixedly connected to the outer surfaces of the rotating shafts 203. Mounting seats 212 for supporting the extrusion rollers 209 are arranged on one side of the multiple positioning plates 213. Dislocation sliding rods 214 that are slidably connected to the mounting seats 212 are fixedly connected inside the positioning plates 213. A tension spring 215 for driving the mounting seats 212 to reset is sleeved on the outer surface of the dislocation sliding rods 214. The flow force of the air flow is converted into the mechanical force for the rotation of the rotating shafts 203, causing the extrusion rollers 209 to continuously extrude the flexible tube 207 to generate a pressure difference inside it. The gas in the water supply tank 201 is inhaled into the interior of the water pipe 202 and then enters the interior of the flexible tube 207. At this time, the rotation of the extrusion rollers 209 will push against the push-pull lever 211, causing the closing plug 210 to move downward to open the drain pipe 208, thereby releasing moisture into the air.

[0039] Furthermore, it also includes a dust suction plate 300, which is evenly rotatably connected to one side of the multiple sleeves 206 and is used to adsorb dust in the air. A torsion spring rotating rod 301 is rotatably connected to one side of the sleeve 206, and a seesaw 302 that can be in contact with the dust suction plate 300 is fixedly connected to one side of the torsion spring rotating rod 301. A flexible strip 303 is fixedly connected to one side of the mounting seat 212, and a trigger rod 304 is fixedly connected to one side of the seesaw 302. The dust suction plate 300 can be in contact with the gas just mixed with moisture, thereby adsorbing some dust. The rotation of the extrusion roller 209 will drive it to move upward, thereby increasing its contact surface with the air. The atomized water droplets combine with the dust to form "mud particles", whose weight increases by 5 - 10 times, accelerating sedimentation and being adsorbed by the dust suction plate 300, and the filtration efficiency is increased by 40%.

[0040] It is worth mentioning that by setting the driving motor 104 to drive the forward and reverse rotation of the axial flow fan 106, different flow directions of the air flow can be realized, and different flow directions will produce different functions. When the straight tube 101 is the exhaust port, the gas can be filtered, and at the same time, moisture is released and mixed with the air flow to increase its humidity and improve the filtration effect. When the straight tube 101 is the air inlet, the reverse flow of the gas will clean the dust attached to the surface of the triangular filter screen 200, and at the same time, the external moisture can be pumped into the interior of the water tank 201 through the water pipe 202 for replenishment, and the dust suction plate 300 will also be gradually flushed and cleaned by the gas horizontally.

[0041] By setting the driving motor 104, the axial flow fan 106 can be driven to rotate forward and reversely to realize different flow directions of the airflow. When the straight tube 101 is the air inlet, the gas flows in the reverse direction, and the dust attached to the surface of the triangular filter 200 is automatically cleaned by the power of the airflow. The rotation of the squeezing roller 209 not only drives the water spraying component to release water, but also adjusts the position of the dust collecting plate 300 through the flexible strip 303, the seesaw 302 and other mechanisms to realize intelligent self-cleaning. In the reverse cleaning mode, the sealing plug 210 and the drain pipe 208 are closed, so that the external water flow is smoothly transported to the inside of the water tank 201, and the water is automatically replenished.

[0042] Specifically, the axial flow fan 106 is driven to generate airflow. When the airflow flows, it will drive the turbine blades 204 to move and drive the rotating shaft 203 to rotate forward, thereby driving multiple squeezing rollers 209 to make circular motion. Under the action of centrifugal force, they will move away from each other and squeeze the soft tube 207, so that the gas in the soft tube 207 flows, thereby driving the water pipe 202 to absorb water into the water tank 201. When the squeezing roller 209 conflicts with the soft tube 207, it will push one end of the push-pull lever 211 to move and pull the closing plug 210 downward, so that the soft tube 207 is connected with the drain pipe 208, and the water in the water supply pipe 202 leaks out and mixes with the gas, thereby further reducing the dust in the gas, so that the water adheres to the dust and is adsorbed on the outer surface of the dust collection plate 300. At the same time, the positive rotation of the squeezing roller 209 will drive the flexible strip 303 to conflict with the trigger rod 304 and drive one end of the seesaw 302 to move upward, thereby raising the position of the dust collection plate 300. The position increases the contact area between it and the gas. When the triangular filter 200 and the dust collecting plate 300 need to be cleaned, the driving motor 104 is operated to drive the driving shaft 105 to reverse and drive the axial flow fan 106 to rotate so that the gas is sucked in through the straight tube 101 and discharged from the filter housing 103. At this time, the gas will pass through multiple triangular filter screens 200 to clean the dust attached to their surfaces. The airflow will drive the turbine blades 204 to reverse and drive the rotating shaft 203 to reverse. At the same time, multiple water pipes 202 are connected to the external water source, so that when the squeezing roller 209 reverses, it pushes the push-pull lever 211 to form a closure between the closing plug 210 and the discharge pipe 208, so that the external water flow is smoothly transported to the inside of the water tank 201 to replenish water. At the same time, the flexible strip 303 will push the seesaw 302 to move one end downward, and the dust collecting plate 300 will gradually be in a horizontal state, so that the gas flowing in the opposite direction can be used to blow away the dust attached to its surface.

[0043] In summary, the two-way air flow circulation realizes self-cleaning: in the forward ventilation and filtration mode, the air flow enters from the filter housing 103, passes through the triangular filter screen 200 and is discharged through the straight tube 101 after filtration. The dust is intercepted by the triangular filter screen. The water spraying component wets the filter screen and increases the weight of the dust. The dust suction plate 300 adsorbs the dust mixed with water to improve the filtration efficiency; in the reverse ventilation self-cleaning mode, the air flow is inhaled reversely from the straight tube 101, the dust attached to the surface is flushed reversely through the triangular filter screen 200, and finally discharged from the filter housing 103. The dust accumulated on the filter screen can be removed without manual intervention, the service life is extended, and the maintenance cost is reduced; the forward air flow drives the turbine blade 204 to rotate, drives the extrusion roller 209 to periodically extrude the flexible tube 207 to form a negative pressure to suck the water in the water tank 201, and intermittently spray water through the drain pipe 208. After the water mist is combined with the dust, the weight increases, the sedimentation is accelerated and adsorbed by the dust suction plate to wet the filter screen: the water adheres to the triangular filter screen, improves its dust loading capacity, prevents blockage, and uses the kinetic energy of the air flow to drive the water spraying without an independent water pump, saving energy; the triangular staggered arrangement increases the gas contact area, cuts the air flow to reduce the resistance, and physically intercepts: the dust is directly blocked by the filter screen. When the air flow changes direction, the dust breaks away from the air flow path due to inertia, and the fine particles diffuse and settle between the filter screen fibers; in the forward air flow, the flexible strip 303 pushes the dust suction plate to lift up to expand the contact area; in the reverse air flow, the gas flushes the dust suction plate to remove the accumulated dust, and the dual adsorption and water spraying increase the dust and then adsorption + direct interception improve the overall dust removal efficiency.

[0044] Embodiment 2: Please refer to Figure 1 , Figure 10 and Figure 11 , the present invention also provides a technical solution. The difference from the technical solution of Embodiment 1 is: a ventilation device for coal mines further includes a gas tank 400, which is fixedly connected to the top of the machine shell 100 and stores inert gas inside. The air outlet end of the gas tank 400 is communicated with a plurality of exhaust pipes 401, and the plurality of exhaust pipes 401 extend to the inside of the machine shell 100 and are provided with a plurality of exhaust balls 403. The top of the exhaust ball 403 is provided with an emission component that cooperates with the air flow to release the inert gas in the gas tank 400. By setting the gas tank 400, inert gas can be released and mixed into the air flow to inhibit methane, and the emission component can effectively automatically release inert gas according to the air flow, improving the convenience.

[0045] Furthermore, the emission component includes a connecting seat 404 fixedly connected to the top of the exhaust balloon 403. The bottom of the exhaust pipe 401 is rotatably connected to a hollow rotating rod 405 with a hollow internal structure. The hollow rotating rod 405 is fixedly connected to the connecting seat 404. A communication groove 406 is formed on the outer surface of the hollow rotating rod 405. The air outlet end of the gas tank 400 is fixedly connected to a one-way valve 402. The cavity inside the machine shell 100 is divided into two channels near the straight tube 101. Since the density of methane is lower than that of air, it will move upward, which makes most of the gas containing methane pass through the upper channel. At this time, the exhaust balloon 403 is blown by the air flow and tilted to drive the hollow rotating rod 405 to rotate so that the communication groove 406 is located inside the exhaust pipe 401, allowing the inert gas to enter the exhaust balloon 403 for emission. When the gas moves in the reverse direction, the communication groove 406 cannot be located inside the exhaust pipe 401, and the communication groove 406 will rotate into the exhaust pipe 401 only when the straight tube 101 is the air outlet.

[0046] Through the inert gas (such as nitrogen, etc.) stored in the gas tank 400, the device can efficiently mix the inert gas into the mine ventilation air flow. Since the density of methane is lower than that of air, it will naturally float upward and accumulate above the mine ventilation air flow. When the air flow blows the exhaust balloon 403 to tilt, the hollow rotating rod 405 rotates, so that the communication groove 406 is aligned with the exhaust pipe 401, and the inert gas is released and mixed with the air flow containing methane. In this way, the inert gas can effectively reduce the concentration of methane and prevent it from reaching the explosion limit, thereby improving the safety of the mine.

[0047] Intelligent response and convenience: The design of the emission component enables the release of inert gas to be automatically adjusted according to the changes in the mine ventilation air flow. When the air flow with a high methane content passes through, the exhaust balloon 403 will be blown and tilted, thus triggering the release of the inert gas. This intelligent response mechanism requires no manual intervention, improving the convenience and efficiency of operation.

[0048] Optimized air flow treatment: The cavity inside the machine shell 100 is divided into two channels. This design helps to more effectively process the mine ventilation air flow. Dust will sink to the lower channel due to gravity, while methane will accumulate in the upper channel due to its lower density. This stratified treatment not only improves the capture efficiency of methane in the air flow but also helps to reduce the interference of dust on the release of inert gas.

[0049] Enhanced system stability: The setting of the one-way valve 402 ensures that the inert gas can only flow from the gas tank 400 to the exhaust balloon 403, preventing the backflow of the inert gas when the air flow moves in the reverse direction. This enhances the stability and reliability of the entire system and avoids the out-of-control release of the inert gas caused by air flow fluctuations or abnormalities.

[0050] Specifically, when the air flow passes through the inside of the casing 100, it will blow multiple exhaust balloons 403 to tilt, thereby driving the connecting seat 404 to swing, causing the hollow rotating rod 405 to rotate and driving the communication groove 406 to be placed inside the exhaust pipe 401. Thus, the inert gas in the gas supply tank 400 enters the exhaust balloon 403 through the hollow rotating rod 405 and is discharged into the casing 100, where it is mixed with the gas to inhibit methane in the gas. The air flow enters the casing from the filter casing 103 through the triangular filter screen 200. The dust sinks to the lower channel, and methane accumulates in the upper channel.

[0051] In summary, the gas tank 400 stores inert gases such as nitrogen / carbon dioxide and releases them into the cavity of the casing 100 through the exhaust pipe 401. Since the density of methane is lower than that of air, it will accumulate in the upper channel of the casing 100. After the inert gas is released, it floats and diffuses to cover the methane area, diluting its concentration below the lower explosion limit. The air flow enters from the filter casing 103, flows upward after passing through the triangular filter screen 200, blows the exhaust balloon 403 to tilt, drives the hollow rotating rod 405 to rotate, aligns the communication groove 406 with the exhaust pipe 401, and the inert gas in the gas tank 400 flows into the exhaust balloon 403 through the one-way valve 402 and is released. When ventilating in the reverse direction, the air flow is inhaled reversely from the straight tube 101. The exhaust balloon 403 is not blown, the communication groove 406 deviates from the exhaust pipe 401, and the release of the inert gas stops to avoid waste. The area near the straight tube 101 in the casing is divided into upper and lower channels. During forward air flow, the dust sinks to the lower channel, and methane accumulates in the upper channel. The inert gas precisely covers the methane enrichment area.

[0052] Working principle: When in use, first start the drive motor 104 to drive the drive shaft 105 to rotate forward, driving the axial flow fan 106 to rotate, so that the air flow passes through the filter casing 103, passes through the four branch pipes 102, enters the inside of the casing 100, and is ejected from the straight tube 101. When the air flow passes through multiple triangular filter screens 200, the dust and impurities inside will be filtered. At the same time, the multiple triangular filter screens 200 can cut the air flow to increase its flow rate. When the air flow passes through the inside of the casing 100, it will blow multiple exhaust balloons 403 to tilt, thereby driving the connecting seat 404 to swing, causing the hollow rotating rod 405 to rotate and driving the communication groove 406 to be placed inside the exhaust pipe 401. Thus, the inert gas in the gas supply tank 400 enters the exhaust balloon 403 through the hollow rotating rod 405 and is discharged into the casing 100, where it is mixed with the gas to inhibit methane in the gas;

[0053] At the same time, when the airflow flows, it will drive the turbine blades 204 to move and drive the rotating shaft 203 to rotate forward, thereby driving the multiple squeezing rollers 209 to make a circular motion. Under the action of centrifugal force, they will move away from each other and squeeze the soft tube 207, so that the gas in the soft tube 207 flows, thereby driving the water pipe 202 to absorb water into the water tank 201. When the squeezing roller 209 conflicts with the soft tube 207, it will push one end of the push-pull lever 211 to move and pull the closing plug 210 downward, so that the soft tube 207 is connected with the drain pipe 208, and the water in the water supply pipe 202 leaks out and mixes with the gas, thereby further reducing the dust in the gas, so that the water adheres to the dust and is adsorbed on the outer surface of the dust collecting plate 300. At the same time, the positive rotation of the squeezing roller 209 will drive the flexible strip 303 to conflict with the trigger rod 304 and drive one end of the seesaw 302 to move upward, thereby raising the position of the dust collecting plate 300 and increasing the contact area between it and the gas.

[0054] When the triangular filter 200 and the dust collecting plate 300 need to be cleaned, the driving motor 104 is operated to drive the driving shaft 105 to reverse and drive the axial flow fan 106 to rotate so that the gas is sucked in through the straight tube 101 and discharged from the filter housing 103. At this time, the gas will pass through multiple triangular filter screens 200 to clean the dust attached to their surfaces. The airflow will drive the turbine blades 204 to reverse and drive the rotating shaft 203 to reverse. At the same time, multiple water pipes 202 are connected to the external water source, so that when the squeezing roller 209 reverses, it pushes the push-pull lever 211 to form a closure between the closing plug 210 and the discharge pipe 208, so that the external water flow can be smoothly transported to the inside of the water tank 201 to replenish water. At the same time, the flexible strip 303 will push the seesaw 302 to move one end downward, so that the dust collecting plate 300 is gradually in a horizontal state, and the gas flowing in the opposite direction can be used to blow away the dust attached to its surface.

[0055] In summary, the triangular filter screen 200 intercepts dust and cuts the air flow, increases the flow rate, and reduces the resistance; the dust is captured by inertial collision and diffusion, and the inert gas floats up to cover the methane enrichment area, diluting the concentration below the lower explosion limit to achieve intrinsic safety explosion protection. By using the rotation of the turbine blade 204 and the rotating shaft 203, as well as the circular motion of the extrusion roller 209, the extrusion of the flexible tube 207 and the supply of moisture are realized. The mixing of moisture and gas further reduces the dust in the gas. At the same time, the dust adheres to the dust suction plate 300 after adhering to the moisture, which helps with subsequent cleaning. The forward rotation of the extrusion roller 209 drives the movement of the flexible strip 303 and the seesaw 302, thereby automatically adjusting the position of the dust suction plate 300, increasing the contact area between it and the gas, and improving the dust adsorption efficiency. When it is necessary to clean the triangular filter screen 200 and the dust suction plate 300, it can be achieved by reversing the drive motor 104. At this time, the gas is inhaled from the straight tube 101 and flows reversely through the triangular filter screen 200, which helps to clean the dust on its surface. At the same time, the reversed extrusion roller 209 will push the push-pull lever 211, causing the closing plug 210 to close the drain pipe 208, thereby allowing external water flow to enter the water tank 201 to achieve automatic replenishment of moisture. The reverse movement of the flexible strip 303 and the seesaw 302 will also make the dust suction plate 300 gradually level, facilitating the blowing of the dust on its surface by the gas flowing in the reverse direction.

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a coal mine, comprising a housing (100) with a built-in cavity and an axial flow fan (106) arranged inside the housing for driving gas flow, characterized in that: Also includes: A triangular filter (200) is constructed of a plurality of triangular filters which are staggered and fixedly connected in a cavity of a housing (100); a water tank (201) storing water is fixedly connected inside the housing (100); one side of the water tank (201) is connected to a plurality of water pipes (202); a soft tube (207) made of rubber is disposed inside the plurality of water pipes (202); and a water spray assembly for drainage is disposed inside the sleeve (206); A dust collecting plate (300) is evenly rotatably connected to one side of the plurality of sleeves (206) and is used to absorb dust in the air; A gas tank (400) is fixedly connected to the top of the casing (100) and stores inert gas therein; a gas outlet end of the gas tank (400) is connected to a plurality of exhaust pipes (401), and the plurality of exhaust pipes (401) extend to the interior of the casing (100) and are provided with a plurality of exhaust balls (403); a discharge component is provided on the top of the exhaust ball (403) for cooperating with the airflow to release the inert gas in the gas tank (400).

2. A ventilation device for coal mines according to claim 1, characterized in that: A driving motor (104) is fixedly connected inside the casing (100), and an output shaft of the driving motor (104) is fixedly connected to a driving shaft (105) for driving an axial flow fan (106) to rotate. One side of the casing (100) is connected to a straight tube (101) adapted to the axial flow fan (106).

3. A ventilation device for coal mine according to claim 2, characterized in that: The water spray assembly comprises a rotating shaft (203) arranged inside a sleeve (206); a plurality of squeezing rollers (209) are evenly arranged on the outer surface of the rotating shaft (203); and the plurality of squeezing rollers (209) are in contact with a soft tube (207); the outer surface of the soft tube (207) is connected to a plurality of hollow tubes (208); the interior of the soft tube (207) is rotatably connected to a plurality of push-pull levers (211); and one end of each of the plurality of push-pull levers (211) is rotatably connected to a sealing plug (210) adapted to the tube (208).

4. A ventilation device for coal mines according to claim 3, characterized in that: The housing (100) is fixedly connected inside with a plurality of brackets (205) for supporting the rotating shaft (203), and the outer surfaces of the plurality of rotating shafts (203) are fixedly connected with turbine blades (204), and the outer surface of the rotating shaft (203) is fixedly connected with a plurality of positioning plates (213), and one side of the plurality of positioning plates (213) is provided with a mounting seat (212) for supporting an extrusion roller (209), and the interior of the positioning plate (213) is fixedly connected with an offset slide bar (214) slidably connected to the mounting seat (212), and the outer surface of the offset slide bar (214) is sleeved with a tension spring (215) for driving the mounting seat (212) to return to its original position.

5. A ventilation device for coal mines according to claim 4, characterized in that: One side of the sleeve (206) is rotatably connected to a torsion spring rotating rod (301), and one side of the torsion spring rotating rod (301) is fixedly connected to a seesaw (302) that can contact the dust collecting plate (300), one side of the mounting seat (212) is fixedly connected to a flexible strip (303), and one side of the seesaw (302) is fixedly connected to a trigger rod (304).

6. A ventilation device for coal mine according to claim 1, characterized in that: The exhaust assembly comprises a connection seat (404) fixedly connected to the top of the exhaust ball (403); the bottom of the exhaust pipe (401) is rotatably connected to a hollow rotating rod (405) with a hollow internal structure; the hollow rotating rod (405) is fixedly connected to the connection seat (404).

7. A ventilation device for coal mines according to claim 6, characterized in that: A connecting groove (406) is provided on the outer surface of the hollow rotating rod (405), and a one-way valve (402) is fixedly connected to the gas outlet end of the gas tank (400).

8. A ventilation device for coal mine according to claim 2, characterized in that: A filter housing (103) is provided at one end of the housing (100) away from the straight tube (101), and one side of the filter housing (103) is connected to a plurality of branch pipes (102) that can be connected to the housing (100).

9. A ventilation device for coal mines according to claim 8, characterized in that: A filter screen is fixedly connected to one side of the filter housing (103).

10. A ventilation device for coal mine according to claim 1, characterized in that: One end of each of the water pipes (202) extends to the outer surface of the casing (100).

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