Gas-water combined secondary dust fall device for mine dust removal fan outlet

Abstract

The invention relates to the technical field of dust falling equipment, and provides a gas-water combined secondary dust falling device for an outlet of a mining dust removal fan. The connecting pipe is arranged at the opening end of the main pipe; the middle-position pipe is rotationally connected between the connecting pipe and the main pipe, and the main pipe, the middle-position pipe and the connecting pipe jointly form a channel through which dust-containing airflow passes; the dust catching net is arranged in the middle pipe, so that the middle pipe rotates to drive the dust catching net to rotate; the atomization spraying assembly comprises an annular pipe and a plurality of atomization nozzles, the annular pipe is fixedly installed on the inner side of the connecting pipe, the atomization nozzles are distributed in a circumferential array mode and are fixedly arranged on the annular pipe in a communicating mode, and the spraying directions of the atomization nozzles face the dust catching net; the water inlet assembly comprises a water inlet pipe, and the water inlet pipe is fixedly installed outside the connecting pipe, penetrates through the connecting pipe and communicates with the annular pipe. And multiple functions of dust falling, online self-cleaning and the like are realized through cooperation of the rotary dust catching assembly, the composite dust removing assembly and the sewage collecting assembly.

Description

Technical Field

[0001] This application relates to the field of dust suppression equipment technology, and more specifically, to a combined air-water secondary dust suppression device for the outlet of a mining dust removal fan. Background Technology

[0002] Currently, while existing mine dust collectors can perform preliminary treatment of dust-laden airflow underground, the discharged airflow still contains a large amount of fine dust, easily causing secondary dust pollution in the roadways, seriously threatening miners' health and operational safety. To address this problem, secondary dust suppression devices are often installed at the dust collector outlet, with wet dust collection combining spraying and fixed dust collection nets being the most common. However, this existing technology has significant drawbacks: the stationary dust collection nets are easily and quickly clogged by moist dust in high-concentration dust environments, leading to a sharp increase in ventilation resistance, a rapid decline in dust collection efficiency, and the need for machine shutdown for cleaning and maintenance, severely impacting continuous production line operation. Furthermore, traditional spray dust suppression methods often fail to effectively collect and treat dust-laden wastewater, allowing it to flow or drip, worsening the underground working environment and wasting water resources. Summary of the Invention

[0003] This application aims to at least address the technical problems in the related technologies, namely, that existing secondary dust suppression devices, due to their fixed dust collection nets, are easily clogged by moist dust in high-concentration dust environments, leading to a sharp increase in ventilation resistance and a rapid decline in dust removal efficiency; and that traditional spray dust suppression methods do not effectively collect and treat dust-laden wastewater, thus worsening the underground working environment.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a combined air-water secondary dust suppression device for the outlet of a mining dust removal fan, comprising: a main pipe with a base fixedly installed at its bottom; a connecting pipe located at the open end of the main pipe and used to communicate with the outlet of the mining dust removal fan; a central pipe rotatably connected between the connecting pipe and the main pipe, the main pipe, the central pipe, and the connecting pipe together forming a channel for the passage of dust-laden airflow; a dust collection net located inside the central pipe, which rotates to physically intercept dust; an atomizing spray assembly including an annular pipe and multiple atomizing nozzles, the annular pipe being fixedly installed inside the connecting pipe, the multiple atomizing nozzles being arranged in a circumferential array and connected and fixed on the annular pipe, with the spray direction of the atomizing nozzles facing the dust collection net; and a water inlet assembly including a water inlet pipe fixedly installed outside the connecting pipe, penetrating the connecting pipe and communicating with the annular pipe, used to deliver water supplied by an external water pump to the atomizing nozzles.

[0005] This application provides a combined air-water secondary dust suppression device for the outlet of a mining dust collector fan. Through the coordinated operation of rotating dust collection, composite cleaning, and wastewater collection components, it achieves multiple functions including efficient interception, online self-cleaning, and resource reuse. Specifically, in the high-efficiency air-water combined dust suppression scenario, after the dust-laden airflow enters the device, it is first pre-wetted and condensed by a highly atomized water curtain sprayed by the atomizing spray component, and then impacts a metal dust collection net that rotates at a uniform speed driven by a central pipe. The rotation of the dust collection net ensures more uniform and sufficient contact between dust and water mist, improving condensation efficiency; on the other hand, centrifugal force is used to throw large particles of mud and water off the net surface, delaying blockage at the source. The dual effect of physical interception and wet condensation significantly improves the collection efficiency of fine dust. In the online automatic cleaning and anti-clogging scenario, the device integrates a composite cleaning system. First, the rotating drive mechanism continuously drives the dust collection net to rotate, using centrifugal force to achieve preliminary and continuous mud and water stripping. Secondly, the reverse airflow cleaning component periodically sprays a uniform high-pressure airflow from the clean side of the dust collection net, penetrating the mesh and blowing off the dust adhering to the windward side. For adhesive caking layers that are difficult to remove using the above methods, the electromagnetic impact cleaning component can be activated in a controlled manner. Its electromagnet generates a strong instantaneous repulsive force, driving the top block to impact the center of the dust collection net at high speed. The resulting shock wave can effectively crack and peel off stubborn dirt. The three-stage cleaning scheme works in synergy to achieve full coverage from daily maintenance to deep cleaning, ensuring that the dust collection net maintains high efficiency in flow and interception capabilities for a long time, without requiring any downtime. In the scenario of wastewater collection and recycling, the bottom of the device is equipped with an integrated wastewater diversion and treatment structure. The captured dust-laden wastewater is collected by the guide slope into the groove at the bottom of the main pipe. After passing through the detachable filter screen to complete the initial filtration of impurities, it is discharged through the drain pipe and can be connected to the mine sewage system or reused for spraying, fundamentally solving the problem of underground wastewater overflow and realizing closed-loop management of water resources and a clean working environment. By organically combining the above components, this device effectively solves the systemic problems of easy clogging of dust collection screens, frequent maintenance, difficult dust removal, and disorderly wastewater in traditional secondary dust suppression devices, providing an efficient, intelligent, and environmentally friendly outlet purification terminal solution for mining dust removal fans.

[0006] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0007] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a combined air-water secondary dust reduction device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a combined air-water and water secondary dust suppression device according to an embodiment of this application, showing the removal of the base. Figure 3for Figure 1 A partial structural diagram of the connecting pipe in the air-water combined secondary dust reduction device of the embodiment shown. Figure 4 for Figure 1 A partial structural schematic diagram of the central tube in the air-water combined secondary dust reduction device of the embodiment shown. Figure 5 for Figure 1 A partial structural schematic diagram of the main pipe in the air-water combined secondary dust reduction device of the embodiment shown. Figure 6 for Figure 1 A schematic diagram of the AA cross-sectional structure of the combined air-water secondary dust reduction device in the embodiment shown. Figure 7 for Figure 1 A schematic diagram of the electromagnetic impact cleaning component in the air-water combined secondary dust suppression device of the embodiment shown.

[0008] in, Figures 1 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Air-Water Combined Secondary Dust Suppression Device, 1 Main Pipe, 2 Base, 3 Connecting Pipe, 4 Center Pipe, 5 Dust Collector, 6 Atomizing Nozzle, 7 Water Inlet Pipe, 8 First Bearing, 9 Second Bearing, 10 Annular Baffle, 11 Guide Slope, 12 Groove, 13 Drain Pipe, 14 Filter Screen, 15 Support Part, 16 Gear Ring, 17 Servo Motor, 18 Drive Wheel, 19 Protective Cover, 20 Air Inlet Pipe, 21 Inner Plate, 22 Exhaust Hole, 23 Conductor Pipe, 24 Guide Sleeve, 25 Movable Rod, 26 Top Block, 27 Spring, 28 Electromagnet, 29 Annular Pipe. Detailed Implementation

[0009] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0010] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0011] The following reference Figures 1 to 7This application describes a combined air-water secondary dust suppression device 100 for the outlet of a mining dust collector fan, according to some embodiments thereof. The device includes: a main pipe 1, with a base 2 fixedly mounted at its bottom; a connecting pipe 3, disposed at the open end of the main pipe 1, for communication with the outlet of the mining dust collector fan; a central pipe 4, rotatably connected between the connecting pipe 3 and the main pipe 1, the main pipe 1, the central pipe 4, and the connecting pipe 3 together forming a channel for the passage of dust-laden airflow; and a dust collector 5, disposed within the central pipe 4 to allow airflow through the central pipe 4. The rotation drives the dust collection net 5 to rotate, which is used to physically intercept dust; the atomizing spray assembly includes an annular pipe 29 and multiple atomizing nozzles 6. The annular pipe 29 is fixedly installed inside the connecting pipe 3. The multiple atomizing nozzles 6 are arranged in a circumferential array and are connected and fixed on the annular pipe 29. The spray direction of the atomizing nozzles 6 is set towards the dust collection net 5; the water inlet assembly includes a water inlet pipe 7, which is fixedly installed outside the connecting pipe 3, passes through the connecting pipe 3 and is connected to the annular pipe 29, and is used to deliver water supplied by an external water pump to the atomizing nozzles 6.

[0012] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the air-water combined secondary dust suppression device 100 provided in this application is used at the outlet of a mining dust removal fan, and includes a main pipe 1, a connecting pipe 3, a central pipe 4, a dust collection net 5, an atomizing spray assembly, and a water inlet assembly. A base 2 is fixedly installed at the bottom of the main pipe 1, and the connecting pipe 3 is located at one open end of the main pipe 1, communicating with the outlet of the mining dust removal fan. The central pipe 4 is rotatably connected between the connecting pipe 3 and the main pipe 1, and the main pipe 1, central pipe 4, and connecting pipe 3 together form a channel for the passage of dust-laden airflow. The dust collection net 5 is disposed inside the central pipe 4, and the rotation of the central pipe 4 drives the dust collection net 5 to rotate, for physical interception of dust. The atomizing spray assembly includes an annular pipe 29 and multiple atomizing nozzles 6. The annular pipe 29 is fixedly installed inside the connecting pipe 3. The multiple atomizing nozzles 6 are arranged in a circumferential array and are connected and fixed on the annular pipe 29. The spray direction of the atomizing nozzles 6 is set towards the dust collection net 5. The water inlet assembly includes a water inlet pipe 7, which is fixedly installed outside the connecting pipe 3, passes through the connecting pipe 3 and is connected to the annular pipe 29, and is used to deliver water supplied by an external water pump to the atomizing nozzles 6.

[0013] Thus, when the mine dust removal fan starts, the dust-laden airflow it discharges enters the combined air-water secondary dust suppression device 100 through the connecting pipe 3. An external water pump supplies water to the annular pipe 29 through the inlet pipe 7, and the fine water mist is sprayed towards the dust collection net 5 by the atomizing nozzles 6 arranged in a circular array. The dust-laden airflow first mixes with the water mist, wetting and agglomerating the fine dust particles. Subsequently, this air-water mixture impacts the continuously rotating dust collection net 5, where the agglomerated large dust particles and some unwetted dust are efficiently intercepted by the metal mesh. Through the dual action of "wet agglomeration" and "rotational physical interception," deep secondary purification of the dust removal fan outlet airflow is achieved, directly improving dust removal efficiency and reducing the risk of secondary dust generation in the roadway.

[0014] Compared with existing technologies, the air-water combined secondary dust suppression device 100 provided in this application has the following advantages: First, by setting a rotatable dust collection net 5, not only is the uniformity and efficiency of dust interception improved, but the centrifugal force of rotation also effectively avoids the rapid agglomeration and clogging of wet dust on the net surface, significantly extending the continuous working time. Second, the circumferential array of atomizing nozzles 6 facing the dust collection net 5 can form a uniform water curtain covering the entire airflow cross section, ensuring the pre-wetting and agglomeration effect of dust and creating favorable conditions for subsequent interception. Third, the overall structure is compact, with a smooth airflow channel formed by the series connection of the main pipe 1, the middle pipe 4, and the connecting pipe 3, and the base 2 providing stable support, facilitating direct installation and docking at the dust removal fan outlet. Fourth, by combining spray dust suppression with rotational interception, a highly efficient and stable secondary dust suppression function is achieved without excessively increasing wind resistance, and operation and maintenance are relatively simple.

[0015] Specifically, dust pollution generated during coal mining not only poses a long-term threat to miners' respiratory health, leading to occupational diseases such as pneumoconiosis and chronic obstructive pulmonary disease, but its cumulative effect can also trigger major safety accidents such as coal dust explosions. This type of dust pollution, possessing the triple attributes of occupational hazard, production safety risk, and environmental pollutant, has become a pressing industry problem due to lagging control technologies, especially given the continuous increase in mechanized mining intensity. To control dust diffusion, mine dust collectors are widely used in local ventilation systems, drawing in dust-laden airflow through negative pressure for preliminary filtration. However, existing mine dust collectors mostly use dry cartridge or bag filters, which are prone to filter clogging, cleaning difficulties, and reduced dust removal efficiency under high humidity and high dust concentration conditions. More importantly, the exhaust airflow after being processed by the fan still contains a large amount of fine dust, especially inhalable particles with a diameter of less than 10μm. Direct discharge into the roadway can easily cause secondary dust generation, failing to meet the stringent requirements for workplace air quality. Therefore, there is an urgent need for a secondary dust suppression device at the blower outlet that can achieve efficient and continuous dust removal, has online self-cleaning capabilities, and can properly treat wastewater, in order to overcome the technical bottleneck of dust collection nets being easy to clog and difficult to clean, and improve the overall environmental quality and operational efficiency of the mine.

[0016] To address the shortcomings of existing technologies, such as Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, this application provides a combined air-water secondary dust suppression device 100 for the outlet of a mining dust removal fan. Through the coordinated operation of rotating dust collection, composite cleaning, and wastewater collection components, it achieves multiple functions including efficient interception, online self-cleaning, and resource reuse. Specifically, in the high-efficiency air-water combined dust suppression scenario, after the dust-laden airflow enters the device, it is first pre-wetted and condensed by a highly atomized water curtain sprayed by the atomizing spray component, and then impacts the metal dust collection net 5, which is driven by the central tube 4 to rotate at a uniform speed. The rotation of the dust collection net 5, on the one hand, makes the contact between dust and water mist more uniform and sufficient, improving the condensation efficiency; on the other hand, it uses centrifugal force to throw large particles of mud and water off the net surface, delaying blockage at the source. The dual effect of physical interception and wet condensation significantly improves the collection efficiency of fine dust. In the online automatic cleaning and anti-clogging scenario, the device integrates a composite cleaning system. First, the rotating drive mechanism continuously drives the dust collection net 5 to rotate, using centrifugal force to achieve preliminary and continuous mud and water stripping. Secondly, the reverse airflow cleaning component periodically sprays a uniform high-pressure airflow from the clean side of the dust collection net 5, penetrating the mesh and blowing off the dust adhering to the windward side. For adhesive caking layers that are difficult to remove by the above methods, the electromagnetic impact cleaning component can be activated in a controlled manner. Its electromagnet 28 generates an instantaneous strong repulsive force to drive the top block 26 to impact the center of the dust collection net 5 at high speed. The resulting shock wave can effectively crack and peel off stubborn dirt. The three-stage cleaning scheme works together to achieve full coverage from daily maintenance to deep cleaning, ensuring that the dust collection net 5 maintains high efficiency in flow and interception for a long time, and that the entire process does not require shutdown. In the case of sewage collection and recycling, the bottom of the device is equipped with an integrated sewage diversion and treatment structure. The captured dusty sewage is collected by the guide slope 11 to the groove 12 at the bottom of the main pipe 1. After passing through the detachable filter screen 14 to complete the initial filtration of impurities, it is discharged through the drain pipe 13. It can be connected to the mine sewage system or recycled for spraying, fundamentally solving the problem of sewage overflow in the mine and realizing closed-loop management of water resources and a clean working environment. With the cooperation of the above components, this device effectively solves the systemic problems of easy clogging of dust collection screens, frequent maintenance, difficult dust removal, and disorderly wastewater in traditional secondary dust suppression devices, providing an efficient, intelligent, and environmentally friendly outlet purification terminal solution for mining dust removal fans.

[0017] In some embodiments, optionally, such as Figure 1 and Figure 3 As shown, a first bearing 8 is installed at the end of the main pipe 1 facing the center tube 4, and a second bearing 9 is installed at the end of the connecting pipe 3 facing the center tube 4. The two ends of the center tube 4 are connected to the first bearing 8 and the second bearing 9 respectively, so that the center tube 4 can rotate relative to the main pipe 1 and the connecting pipe 3 through the first bearing 8 and the second bearing 9.

[0018] Specifically, such as Figure 3As shown, the left end of the central tube 4 is rotatably connected to the main tube 1 via the first bearing 8, and the right end is rotatably connected to the connecting tube 3 via the second bearing 9. The first bearing 8 and the second bearing 9 are reliably installed at the ends of the main tube 1 and the connecting tube 3, respectively, forming two fulcrums for the rotational movement of the central tube 4. This double-bearing support structure rotatably connects the central tube 4 and its internal dust collection screen 5 to the center of the airflow channel, ensuring smooth airflow while allowing free rotation around the axis.

[0019] In some embodiments, optionally, such as Figure 4 and Figure 5 As shown, it also includes: a rotary drive mechanism, which is mounted on the base 2 and connected to the center tube 4, and is used to drive the center tube 4 to rotate.

[0020] Specifically, such as Figure 5 As shown, the combined air-water secondary dust suppression device 100 also includes a rotary drive mechanism, which is fixedly mounted on the base 2, and its output end is connected to the intermediate tube 4 via a transmission connection. This design transforms the intermediate tube 4 and its internal dust collection screen 5 from a passively rotating component into an actively operating dust removal functional unit. It utilizes centrifugal force to achieve preliminary self-cleaning, enabling automated operation. Furthermore, the drive parameters can be adjusted to adapt to different dust conditions, improving the device's automation level and adaptability to various operating conditions.

[0021] In some embodiments, optionally, such as Figure 1 and Figure 6 As shown, the rotary drive mechanism includes a gear ring 16, a servo motor 17, and a drive wheel 18; the gear ring 16 is sleeved and fixed on the outside of the center tube 4; the servo motor 17 is fixedly mounted on the base 2; the drive wheel 18 is fixedly mounted on the output shaft end of the servo motor 17 and meshes with the gear ring 16; a protective cover 19 fixed on the base 2 is provided on the outside of the drive wheel 18 and the gear ring 16.

[0022] Specifically, such as Figure 6 As shown, the rotary drive mechanism uses a gear meshing transmission method. The gear ring 16 fixed to the outside of the center tube 4 and the drive wheel 18 mounted on the output shaft of the servo motor 17 form a transmission pair. When the servo motor 17 starts, the drive wheel 18 rotates, transmitting power to the gear ring 16 through the meshing of the gear teeth, thereby driving the entire center tube 4 to rotate around its axis. In addition, the protective cover 19 on the outside completely encloses the transmission components, effectively preventing dust, moisture, and foreign objects from entering the meshing area, avoiding jamming, accelerated wear, or safety accidents. This provides a strong, precise, and protected drive for the rotation of the dust collection screen 5, ensuring the stable generation of the centrifugal force required for dust removal, while greatly improving the adaptability and service life of the transmission system in harsh downhole environments.

[0023] In some embodiments, optionally, such as Figure 2 and Figure 6 As shown, it also includes a sewage diversion structure, which includes an annular baffle 10 and a diversion slope 11; the annular baffle 10 is fixedly installed in the connecting pipe 3 to prevent sewage backflow; the diversion slope 11 is integrally formed on the inner wall of the intermediate pipe 4 to divert sewage into the main pipe 1.

[0024] Specifically, such as Figure 6 As shown, the wastewater guiding structure consists of a cooperating annular baffle 10 and a guiding slope 11. The annular baffle 10 is fixedly positioned inside the connecting pipe 3, and its annular structure effectively blocks the dust-laden wastewater flowing back along the pipe wall, preventing it from flowing back into the upstream mining dust removal fan and ensuring the safety and cleanliness of the fan's interior. The guiding slope 11, as part of the inner wall of the intermediate pipe 4, is designed as a smooth inclined surface sloping towards the main pipe 1. When the device is running, the dust captured by the atomized water droplets and attached to the rotating dust collection net 5 is thrown to the inner wall of the intermediate pipe 4 under centrifugal force, and then guided along the inclined surface of the guiding slope 11, flowing smoothly into the interior of the main pipe 1 below under gravity. In this way, while treating the dust-laden airflow, the initial separation and directional guidance of wastewater are automatically and efficiently achieved, fundamentally avoiding the risk of disorderly accumulation of wastewater inside the device or backflow into critical parts of the equipment.

[0025] In some embodiments, optionally, such as Figure 1 and Figure 6 As shown, it also includes a sewage collection and discharge structure, which includes a groove 12, a drain pipe 13, and a filter screen 14. The groove 12 is opened in the main pipe 1 to receive sewage, and its lower end extends into the base 2. The drain pipe 13 is fixedly installed on one side of the base 2 and communicates with the groove 12. The filter screen 14 is set in the groove 12 to filter impurities.

[0026] Specifically, such as Figure 6 As shown, the combined air-water secondary dust suppression device 100 also includes a wastewater collection and discharge structure, which constitutes the final treatment unit for the guided wastewater at the bottom of the device. A groove 12, located at the bottom of the main pipe 1 and extending into the base 2, forms a lowest-positioned water collection chamber, effectively collecting all dust-laden wastewater introduced via the guide slope 11. A filter screen 14, positioned above the groove 12, acts as a physical barrier, intercepting larger particulate impurities before the wastewater enters the drainage system, preventing pipe blockage. A drain pipe 13, connected to the bottom of the groove 12, directs the filtered wastewater to the external sewage system. This achieves centralized collection, online preliminary filtration, and controlled discharge of wastewater generated during the dust suppression process, maintaining the cleanliness of the device's interior and underground working environment, avoiding secondary pollution or equipment corrosion caused by wastewater accumulation, and providing the possibility for water resource recycling.

[0027] In some embodiments, optionally, such as Figure 5 and Figure 6 As shown, it also includes a reverse airflow cleaning assembly, which includes an air inlet pipe 20, an inner plate 21, and multiple guide pipes 23. The air inlet pipe 20 is fixedly installed inside the main pipe 1, and its upper end passes through the main pipe 1 to connect to an external high-pressure air source. The inner plate 21 is set inside the main pipe 1 and is hollow inside, with several exhaust holes 22 opened on the side facing the dust collection net 5. The multiple guide pipes 23 are arranged in a circumferential array and are fixedly connected between the air inlet pipe 20 and the inner plate 21.

[0028] Specifically, such as Figure 6 As shown, the combined air-water secondary dust suppression device 100 also includes a reverse airflow cleaning component, which constitutes a non-contact cleaning system for the back of the dust collection net 5. The inlet pipe 20 is vertically fixed inside the main pipe 1, serving as the input channel for an external clean high-pressure air source. It is connected to a hollow inner plate 21 located downstream of the dust collection net 5 via multiple circumferentially arrayed guide pipes 23, forming an annular or disc-shaped airflow distribution chamber. The inner plate 21 has a large number of fine exhaust holes 22 evenly distributed on its surface facing the dust collection net 5. When the component is activated, the high-pressure airflow enters the cavity of the inner plate 21 through the inlet pipe 20 and guide pipes 23, and is finally evenly ejected from all the exhaust holes 22, forming an air curtain covering the entire back of the dust collection net 5. This reverse airflow can effectively penetrate the mesh of the dust collection net 5, blowing away dust, mud film, or scale attached to the windward side, thereby maintaining the long-lasting permeability and dust removal efficiency of the dust collection net 5, and the airflow distribution is uniform, avoiding the problem of ineffective local cleaning.

[0029] In some embodiments, optionally, such as Figure 5 and Figure 6 As shown, the inner plate 21 is configured as a ring.

[0030] Specifically, such as Figure 5 As shown, the inner plate 21 is configured as a ring structure, coaxially sleeved on the outside of the central tube 4. Its hollow annular cavity is connected to multiple circumferentially arrayed guide pipes 23, forming a continuous airflow distribution ring around the back of the dust collector 5. When an external high-pressure air source is introduced through the inlet pipe 20, the airflow is diverted through the guide pipes 23 and enters this annular cavity to achieve uniform pressure. Finally, it is ejected from the evenly distributed exhaust holes 22 on the annular surface, forming a complete annular reverse air curtain that matches the rotation trajectory of the dust collector 5. This achieves uniform and comprehensive airflow backflushing, greatly improving the thoroughness and consistency of dust removal.

[0031] In some embodiments, optionally, such as Figure 6 and Figure 7As shown, it also includes an electromagnetic impact dust removal assembly, which includes a guide sleeve 24, a movable rod 25, a top block 26, a spring 27, and an electromagnet 28. The guide sleeve 24 is fixedly installed at the end of the air inlet pipe 20 and passes through the inner plate 21. The movable rod 25 is slidably installed inside the guide sleeve 24 and is made of magnet. The top block 26 is fixedly installed at the end of the movable rod 25 facing the dust collection net 5. The spring 27 is sleeved on the outside of the movable rod 25, and its two ends are fixedly connected to the top block 26 and the guide sleeve 24 respectively. The electromagnet 28 is fixedly installed inside the guide sleeve 24 and is used to drive the top block 26 to impact the dust collection net 5 when energized.

[0032] Specifically, such as Figure 7 As shown, the combined air-water secondary dust suppression device 100 also includes an electromagnetic impact cleaning assembly. The electromagnetic impact cleaning assembly uses the end of the air inlet pipe 20 as its mounting base and is a linear impact mechanism driven by an electromagnet 28. A guide sleeve 24 is fixedly installed at the end of the air inlet pipe 20 and passes through the inner plate 21, providing a precise sliding track for the movable rod 25. The movable rod 25 is made of magnet material, with a top block 26 installed at one end and the other end placed inside the guide sleeve 24, allowing it to slide back and forth within the sleeve. A spring 27 is fitted onto the movable rod 25, with its two ends abutting against the top block 26 and the guide sleeve 24 respectively, keeping the top block 26 in a retracted state under normal conditions. The electromagnet 28 is fixedly installed inside the guide sleeve 24, opposite to the magnetic end of the movable rod 25. When the assembly needs to operate, the electromagnet 28 is instantaneously energized, generating a strong repulsive magnetic field with the same pole as the movable rod 25, pushing the movable rod 25 to overcome the resistance of the spring 27 and eject at high speed, causing the top block 26 to violently impact the central area of ​​the dust collection net 5. After the impact is completed, the electromagnet 28 is de-energized, the magnetic field disappears, and the restoring force of the spring 27 immediately causes the movable rod 25 to drive the top block 26 to retract quickly, completing one impact cycle.

[0033] In some embodiments, optionally, such as Figure 1 As shown, the end of the connecting pipe 3 is integrally formed with a flange; and / or, the dust collection screen 5 is detachably connected to the inside of the intermediate pipe 4 by screws.

[0034] Specifically, such as Figure 1 As shown, the end of the connecting pipe 3 adopts an integrally formed flange structure, which allows the device to be quickly, reliably, and with a good seal with the standard flange at the outlet of the mining dust collector fan via bolts. This greatly simplifies the installation process and ensures the airtightness of the connection. Meanwhile, the dust collector 5 is detachably installed on the inside of the intermediate pipe 4 using screws. This connection method is not only strong and reliable, but more importantly, it greatly facilitates the daily inspection, periodic cleaning, or replacement of the dust collector 5 if damaged. Operators can remove the screws when necessary to remove the dust collector 5 from the intermediate pipe 4 without disassembling the entire device body, significantly reducing the complexity of maintenance work and downtime.

[0035] In a specific application, an embodiment of this application provides a combined air-water secondary dust suppression device for the outlet of a mining dust removal fan, including a main pipe 1, a base 2 fixedly installed at the bottom of the main pipe 1, a connecting pipe 3 at the open end of the main pipe 1, the connecting pipe 3 communicating with the outlet of the mining dust removal fan, a middle pipe 4 between the connecting pipe 3 and the main pipe 1, the main pipe 1, the middle pipe 4 and the connecting pipe 3 forming a channel, and a dust collection net 5 inside the middle pipe 4 for physically intercepting dust.

[0036] Specifically, an annular pipe 29 is fixedly installed inside the connecting pipe 3. Multiple atomizing nozzles 6 arranged in a circular array are connected to and fixedly installed on the annular pipe 29. The atomizing nozzles 6 are positioned facing the dust collection net 5. A water inlet pipe 7 is fixedly installed outside the connecting pipe 3. The water inlet pipe 7 passes through the connecting pipe 3 and is connected to the annular pipe 29. An external water pump pumps water into the water inlet pipe 7, which is then discharged from the atomizing nozzles 6.

[0037] Specifically, the end of the connecting pipe 3 is integrally formed with a flange, and the dust collection screen 5 is connected to the inside of the intermediate pipe 4 by screws. The end of the main pipe 1 facing the intermediate pipe 4 is equipped with a first bearing 8, and the end of the connecting pipe 3 facing the intermediate pipe 4 is equipped with a second bearing 9. The two ends of the intermediate pipe 4 are respectively connected to the first bearing 8 and the second bearing 9, and the two ends of the intermediate pipe 4 are rotatably mounted on the main pipe 1 and the connecting pipe 3 respectively.

[0038] Specifically, an annular baffle 10 is fixedly installed inside the connecting pipe 3. The annular baffle 10 is used to prevent sewage from flowing back into the mining dust removal fan. A guide slope 11 is integrally formed on the inner wall of the intermediate pipe 4. The guide slope 11 is used to guide the sewage in the intermediate pipe 4 into the main pipe 1.

[0039] Specifically, a groove 12 is provided inside the main pipe 1, and sewage from the intermediate pipe 4 flows into the groove 12. The lower end of the groove 12 extends into the base 2. A drain pipe 13 is fixedly installed on one side of the base 2, and the drain pipe 13 communicates with the groove 12. The other end of the drain pipe 13 is connected to an external sewage pipe. A filter screen 14 is provided in the groove 12. The filter screen 14 is used to filter impurities in the sewage. A support part 15 is fixedly installed on the filter screen 14, and the support part 15 passes through the filter screen 14. The lower end of the support part 15 is placed in the groove 12.

[0040] Specifically, a drive mechanism is installed on the base 2, and the drive mechanism is connected to the center tube 4. The drive mechanism is used to drive the dust collection net 5 inside the center tube 4 to rotate. The drive mechanism includes a gear ring 16 sleeved on the outside of the center tube 4. A servo motor 17 is fixedly installed on the base 2. A drive wheel 18 is fixedly installed on the output shaft end of the servo motor 17. The drive wheel 18 meshes with the gear ring 16. A protective cover 19 is fixedly installed on the base 2. The protective cover 19 is located outside the servo motor 17 and the drive wheel 18.

[0041] When the mine dust removal fan starts, the dust-laden airflow is discharged from the fan outlet and enters the connecting pipe 3 of this device. The device achieves efficient dual collection of dust through the combined action of high-pressure atomizing spray and rotating dust collection net 5, which involves both physical interception and wet coagulation. The collected wastewater is collected by the guide structure into the groove 12 at the bottom of the main pipe 1, and then discharged or reused through the drainage system, thus completing the entire secondary dust suppression process.

[0042] Specifically, the dust-laden airflow enters the device. When the mine dust removal fan is running, the airflow carrying a large amount of dust is discharged from the outlet and enters the connecting pipe 3 through the flange. The airflow passes sequentially through the connecting pipe 3, the intermediate pipe 4, the dust collection net 5 installed on the intermediate pipe 4, and the main pipe 1, and is finally discharged into the roadway or subsequent ventilation system. At the same time as the mine dust removal fan starts, the linkage control causes the external water pump to supply water to the water inlet pipe 7; the water flows through the water inlet pipe 7 into the annular pipe 29, and is sprayed towards the dust collection net 5 in the form of high-pressure atomization through multiple atomizing nozzles 6 distributed around its circumference; the atomized water droplets collide, adsorb, and agglomerate with dust particles in the airflow, causing fine dust to gather into larger particles, which are easier to collect later. The spray system is linked with the fan. The spraying starts as soon as the fan starts and shuts off after a delay after the fan stops, ensuring that residual dust is fully treated and avoiding secondary dust generation.

[0043] The dust-laden airflow carries atomized water droplets into the central tube 4, impacting the surface of the dust collection net 5. The dust collection net 5 is made of metal and has a high-density mesh structure, which can physically intercept large dust particles. At the same time, the atomized water droplets form a water film on the net surface, further capturing fine dust particles, achieving a dual dust reduction effect of wet coagulation and interception.

[0044] Simultaneously, the servo motor 17 drives the drive wheel 18, which in turn drives the meshing gear ring 16. The gear ring 16 is fixed to the outer wall of the central tube 4, thereby driving the entire central tube 4 and the dust collection net 5 inside it to rotate at a constant speed around the axis. The rotation action allows different positions of the dust collection net 5 to receive atomized airflow, so that the dust on the dust collection net 5 can come into uniform contact with the atomized airflow, improving the binding efficiency of the atomized airflow and dust particles. On the other hand, centrifugal force is used to throw out the mud attached to the net surface, effectively preventing blockage and maintaining efficient flow and dust collection capabilities.

[0045] Wastewater generated during dust collection flows downwards along the guide slope 11 on the inner wall of the central pipe 4. The guide slope 11 directs the wastewater into the groove 12 at the bottom of the main pipe 1. An annular baffle 10 is installed inside the connecting pipe 3 to prevent wastewater from flowing back to the blower, ensuring equipment safety. A filter screen 14 is installed inside the groove 12 to perform preliminary filtration of large particulate impurities in the wastewater. The filter screen 14 is fixed by a support 15 to ensure stability and maintainability, and the filter screen 14 is also removable. The filtered water is discharged through the drain pipe 13 and can be connected to the mine sewage system or collected for use in roadway spraying, achieving water conservation and resource recycling.

[0046] Specifically, an air inlet pipe 20 is fixedly installed inside the main pipe 1. The upper end of the air inlet pipe 20 passes through the main pipe 1 and is connected to the air outlet pipe of the external fan. The airflow is introduced into the air inlet pipe 20 by the external fan. An inner plate 21 is installed inside the main pipe 1. The inner plate 21 is hollow inside. Several evenly distributed exhaust holes 22 are opened on the side of the inner plate 21 facing the dust collection net 5. Multiple guide pipes 23 arranged in a circular array are fixedly installed between the inner plate 21 and the air inlet pipe 20. The air inlet pipe 20 is connected to different positions of the inner plate 21 through the multiple guide pipes 23.

[0047] Using an externally introduced clean high-pressure airflow, it is blown in reverse from the downstream side of the dust collection net 5, i.e. the main pipe 1 side, penetrating the mesh of the dust collection net 5, and blowing off the dust, mud film or scale attached to the net surface, especially the windward side, in the opposite direction, to achieve efficient and non-contact cleaning, prevent the dust collection net 5 from clogging, maintain the flow efficiency and dust removal performance, and the airflow direction is opposite to the direction of the dust-laden airflow.

[0048] In addition, an external fan or compressed air system is connected to the intake pipe 20 through a pipeline. After the high-pressure airflow enters from the intake pipe 20, it is diverted to the annular hollow inner plate 21 through multiple circumferentially distributed guide pipes 23, and then discharged through several evenly distributed exhaust holes 22. This ensures that the high-pressure airflow can be sprayed evenly along the back of the entire dust collection net 5, i.e. the clean side, avoiding uneven dust removal caused by local blowing.

[0049] Specifically, the inner plate 21 is annular, and a guide sleeve 24 is fixedly installed at the end of the air intake pipe 20. The guide sleeve 24 passes through the inner plate 21, and a movable rod 25 is slidably installed inside the guide sleeve 24. A top block 26 is fixedly installed at the end of the movable rod 25 facing the dust collection net 5. A spring 27 is sleeved on the movable rod 25, and both ends of the spring 27 are fixedly connected to the top block 26 and the guide sleeve 24, respectively. The movable rod 25 is made of magnet, and an electromagnet 28 is fixedly installed inside the guide sleeve 24. The channel of the electromagnet 28 applies a repulsive force to the movable rod 25, causing the top block 26 to strike the center of the dust collection net 5.

[0050] Under normal conditions, spring 27 is in its natural state, keeping the top block 26 away from the dust collector 5. When electromagnet 28 is energized, it generates a magnetic field, producing an instantaneous repulsive force on the movable rod 25. Under the action of this repulsive force, the movable rod 25 overcomes the resistance of spring 27 and springs forward, causing the top block 26 to strike the center of the dust collector 5. The impact of the top block 26 can effectively crack and peel off the accumulated dust or dirt on the dust collector 5. After electromagnet 28 is de-energized, the repulsive force disappears, spring 27 pushes the movable rod 25 back, and the top block 26 returns to its initial position, waiting for the next trigger.

[0051] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0052] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A combined air-water secondary dust suppression device for the outlet of a mining dust collector fan, characterized in that, include: The main body has a base fixedly installed at its bottom; A connecting pipe is provided at the open end of the main pipe and is used to connect to the outlet of the mining dust removal fan. A center tube is rotatably connected between the connecting tube and the main tube, and the main tube, the center tube, and the connecting tube together form a channel for the dust-laden airflow to pass through; A dust-catching net is installed inside the central tube so that the dust-catching net can be rotated by the rotation of the central tube, thereby physically intercepting dust. Atomizing spray assembly, comprising an annular tube and multiple atomizing nozzles, wherein the annular tube is fixedly installed inside the connecting tube, and the multiple atomizing nozzles are arranged in a circumferential array and connected and fixed on the annular tube, and the spray direction of the atomizing nozzles is set towards the dust collection net; The water inlet assembly includes a water inlet pipe, which is fixedly installed outside the connecting pipe, passes through the connecting pipe, and communicates with the annular pipe, for conveying water supplied by an external water pump to the atomizing nozzle.

2. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 1, characterized in that, A first bearing is installed at the end of the main pipe facing the center tube, and a second bearing is installed at the end of the connecting pipe facing the center tube. The two ends of the center tube are respectively connected to the first bearing and the second bearing, and the center tube can rotate relative to the main pipe and the connecting pipe through the first bearing and the second bearing.

3. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 1, characterized in that, Also includes: A rotary drive mechanism is mounted on the base and connected to the center tube, and is used to drive the center tube to rotate.

4. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 3, characterized in that, The rotary drive mechanism includes a gear ring, a servo motor, and a drive wheel; The toothed ring is fitted and fixed to the outside of the central tube; The servo motor is fixedly mounted on the base; The drive wheel is fixedly mounted on the output shaft end of the servo motor and meshes with the gear ring. The drive wheel and the gear ring are provided with protective covers fixed to the base on their outer sides.

5. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to any one of claims 1 to 4, characterized in that, It also includes a sewage diversion structure, which includes an annular baffle and a diversion slope; The annular baffle is fixedly installed inside the connecting pipe to prevent sewage backflow; The guide slope is integrally formed on the inner wall of the central pipe and is used to guide sewage into the main pipe.

6. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 5, characterized in that, It also includes a wastewater collection and discharge structure, which includes a groove, a drain pipe, and a filter screen; The groove is formed inside the main pipe to receive sewage, and its lower end extends into the base. The drain pipe is fixedly installed on one side of the base and communicates with the groove. The filter screen is disposed in the groove and is used to filter impurities.

7. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to any one of claims 1 to 4, characterized in that, It also includes a reverse airflow cleaning assembly, which includes an air inlet pipe, an inner plate, and multiple guide pipes; The air intake pipe is fixedly installed inside the main pipe, and its upper end passes through the main pipe to connect to an external high-pressure air source. The inner plate is disposed inside the main pipe and is hollow inside, with several exhaust holes on the side facing the dust collection net; Multiple of the aforementioned guide tubes are arranged in a circumferential array and are fixedly connected between the air intake pipe and the inner plate.

8. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 7, characterized in that, The inner plate is designed to be annular.

9. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 7, characterized in that, It also includes an electromagnetic impact cleaning assembly, which includes a guide sleeve, a movable rod, a top block, a spring, and an electromagnet; The guide sleeve is fixedly installed at the end of the air intake pipe and passes through the inner plate; The movable rod is slidably installed inside the guide sleeve, and its material is magnet. The top block is fixedly installed at the end of the movable rod facing the dust collection net; The spring is sleeved on the outside of the movable rod, and its two ends are fixedly connected to the top block and the guide sleeve, respectively. The electromagnet is fixedly installed inside the guide sleeve and is used to drive the top block to strike the dust collection net when energized.

10. The combined air-water secondary dust suppression device for the outlet of a mining dust collector fan according to claim 1, characterized in that, The end of the connecting pipe is integrally formed with a flange; and / or, the dust collection screen is detachably connected to the inside of the central pipe by screws.

Images