Fresh air dust removal device for coal mining

Abstract

The invention relates to the technical field of dust removal equipment, in particular to a fresh air dust removal device for coal mining, which comprises a shell, a dust removal cavity, an air inlet pipe and an air outlet pipe are arranged in the shell, the dust removal cavity is cylindrical, a dust removal filter screen is arranged in the dust removal cavity, the dust removal filter screen is annular, and air sucked by the air inlet pipe passes through the dust removal filter screen to circulate to the air outlet pipe. The shell is provided with a humidification assembly and an ash removal assembly, the humidification assembly and the ash removal assembly are located on the two sides of the joint of the dust removal cavity and the air inlet pipe correspondingly, and the shell is provided with a rotation driving unit used for driving the dust removal filter screen to rotate around the axis of the dust removal filter screen. The contact area and the filtering path of airflow and the dedusting filter screen are increased, the humidifying assembly keeps the dedusting filter screen wet, the dedusting efficiency is improved, the dedusting assembly cleans wet impurities filtered by the dedusting filter screen in real time, and the dedusting effect of the dedusting filter screen is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal equipment, in particular to a new air dust removal device for coal mine mining. Background Art

[0002] Dust pollution in coal mines poses a significant threat to production safety, environmental protection, and miner health. Coal mine dust, particularly coal dust, rock dust, and mixed dust, can not only cause pneumoconiosis but also pose the risk of explosions. Therefore, efficient fresh air dust removal equipment is a core component of coal mine ventilation safety systems in industrial and mining engineering construction.

[0003] Chinese patent CN106958454B discloses a new type of wet coal mine dust collector, including an outer shell, a dust hood, and an exhaust hood, and the dust hood and the exhaust hood are respectively installed at the left and right ends of the outer shell. An outer jacket is installed at the right end of the connection between the dust hood and the outer shell, and an atomization hole is provided at the contact point between the inner part of the outer jacket and the outer shell. The outer jacket is connected to a mixing valve, and the mixing valve is connected to a water pressure pipe and an air pressure pipe. The other valve port of the mixing valve is connected to an ejector nozzle through a pipeline.

[0004] The device sprays liquid through the jet nozzle to form an atomized wall that contacts the dust in the flowing gas, thereby absorbing the dust. However, inside the outer shell, the high-speed airflow inhaled may affect the formation of the atomized wall, resulting in the atomized wall being unable to cover the path of the airflow, and the atomized water droplets being unable to fully contact the airflow for dust removal. However, increasing the amount of liquid sprayed will result in a large amount of water being generated per unit time, which will lead to more water on the ground in the mine, affecting coal mining, and causing the coal mine to become damp. Summary of the Invention

[0005] In view of the above-mentioned technical deficiencies, the object of the present invention is to provide a fresh air dust removal device for coal mine mining, comprising a shell, a dust removal chamber is arranged in the shell, the lower part of the dust removal chamber is connected to the air inlet pipe, the upper part of the dust removal chamber is connected to the air outlet pipe, the dust removal chamber is cylindrical, a dust removal filter is arranged inside the dust removal chamber of the shell, the dust removal filter is annular, and the dust removal filter is rotatably mounted on the shell through limit rings coaxially arranged at both ends, the axis of the dust removal filter is in the same straight line as the axis of the dust removal chamber, the gas sucked in by the inlet pipe passes through the dust removal filter and flows to the outlet pipe, a humidifying component and a cleaning component are arranged on the shell, the humidifying component and the cleaning component are respectively located on both sides of the connection between the dust removal chamber and the inlet pipe, the humidifying component is used to humidify the outer wall of the dust removal filter, and the cleaning component is used to remove impurities attached to the outer wall of the dust removal filter, and a rotating drive unit for driving the dust removal filter to rotate around its own axis is provided on the shell.

[0006] Preferably, the shell is provided with mounting cavities at both ends of the dust removal chamber, the limiting ring of the dust removal filter is located in the mounting cavity, the limiting ring is provided with an external tooth groove surrounding the outer wall of the limiting ring, and the inner wall of the mounting cavity is provided with an internal tooth ring; the rotation drive unit includes a number of planetary gears located in the mounting cavity, the planetary gears are respectively meshed with the external tooth groove and the internal tooth ring, the planetary gears are rotatably installed on the gear rack, and a shaft is provided at the axis of the gear rack, and the shaft and the axis of the dust removal filter are in the same straight line; the rotation drive unit also includes a first rotation drive fixedly mounted on the outside of the shell, and the working end of the first rotation drive is transmission connected to the shaft.

[0007] Preferably, the humidifying component includes a humidifying roller rotatably mounted on one side of the dust removal chamber, the axis of the humidifying roller is parallel to the axis of the dust removal filter, the outer wall of the humidifying roller is covered with a water absorption layer, and the side of the water absorption layer close to the outlet pipe is in contact with the outer wall of the dust removal filter, the shaft heads coaxially arranged at both ends of the humidifying roller are inserted into the shell, and a first driven gear is coaxially arranged on the shaft head at one end away from the rotating drive unit, and the first driven gear is meshed with the external tooth groove on the limiting ring of the dust removal filter; the humidifying component also includes a water tank mounted on the shell, a water inlet pipe is provided on the top of the water tank, and a water outlet is provided at the bottom of the water tank, the width of the water outlet is smaller than the diameter of the humidifying roller, and the water outlet is in contact with the side of the humidifying roller away from the dust removal chamber.

[0008] Preferably, the dust cleaning component includes a debris removal pipe inserted in the air intake pipe, and a transfer chamber with a circular cross-section is provided at one end of the debris removal pipe located in the air intake pipe, and a feed port and a discharge port are provided on the transfer chamber, and the feed port is connected to the air intake pipe, and the transfer chamber is located on one side of the feed port and is in contact with the outer wall of the dust removal filter, and a rotating shaft is rotatably installed in the transfer chamber, and the axis of the rotating shaft and the axis of the transfer chamber are in the same straight line and parallel to the axis of the dust removal chamber, and a plurality of dividing blades extending along the axis of the rotating shaft are provided on the circumference of the rotating shaft, and the top of the dividing blade is in contact with the inner wall of the transfer chamber, and a temporary storage chamber for transporting impurities is formed between two adjacent dividing blades; the discharge port located below the transfer chamber is connected to a guide channel located outside the debris removal pipe, and one end of the guide channel is connected to a conveying channel, and a conveyor belt for conveying impurities is installed in the conveying channel.

[0009] Preferably, one end of the rotating shaft away from the rotary drive unit extends into the installation cavity and is coaxially mounted with a second driven gear, and the second driven gear is meshedly connected with the external tooth groove on the limiting ring.

[0010] Preferably, the axis of the dust removal chamber is arranged obliquely, the guide channel extends obliquely along the axis direction of the dust removal chamber, and the conveying channel is located at the lower end of the guide channel.

[0011] Preferably, the shaft extends to the interior of the dust filter, and a plurality of spiral scrapers are provided on the circumference of the shaft, and the spiral scrapers fit the inner wall of the dust filter.

[0012] Preferably, the higher end of the dust filter is sealed by a sealing disk, and a first axial hole for avoiding the shaft rod is provided at the axis of the sealing disk. An extension ring is provided at the lower end of the dust filter, and the extension ring extends to the outside of the installation cavity. A notch is provided at the bottom of the extension ring, and the opening of the extension ring is sealed by a coaxially arranged sealing cover; a material receiving pipe is provided on the conveying channel, and the material receiving pipe extends vertically to the bottom of the notch.

[0013] Preferably, a limit block is coaxially provided at one end of the shaft away from the first rotary driver, and a second axial hole is provided at the axis of the blocking cover which is in the same straight line as the shaft, and the blocking cover is sleeved on the shaft through the second axial hole. When the blocking cover moves to fit the limit block, the gap is released and the opening of the extension ring is kept blocked.

[0014] Preferably, a dust collection duct is installed at the air inlet pipe, a fan and a second rotary driver for driving the fan to rotate are provided in the dust collection duct.

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, the dust filter of the present invention is annular and is installed coaxially with the dust removal chamber. After the dust-laden airflow enters from the air inlet pipe, it must radially pass through the dust filter, which increases the contact area and filtration path between the airflow and the dust filter, ensuring comprehensive contact between the dust-laden airflow and the dust filter. The humidifying component keeps the dust filter moist. When the dust contacts the moist dust filter, it will be more firmly adsorbed due to the viscosity of water, thereby improving the dust removal efficiency. After the gas after dust removal is discharged, air pollution is effectively avoided, the environmental protection effect in industrial and mining projects is improved, and the health of workers is also guaranteed.

[0016] Secondly, the inner wall of the transfer chamber of the dust cleaning component in the present invention is located on the side of the feed port and fits with the outer wall of the dust filter. The impurities on the rotating dust filter are scraped off to the feed port. As the rotating shaft rotates, the impurities in the temporary storage chamber are discharged from the discharge port and enter the conveying channel through the guide channel. Under the action of the conveyor belt in the conveying channel, they are continuously transported to the designated location for centralized processing, thereby realizing real-time cleaning of the wet impurities filtered by the dust filter and ensuring the continuous and efficient operation of the dust filter.

[0017] Third, the spiral scrapers, positioned around the shaft, adhere to the inner wall of the dust filter and, driven by the shaft, rotate along the inner wall. As the dust filter and the spiral scrapers rotate, they scrape off impurities adhering to the inner wall of the dust filter, ensuring the dust removal efficiency of the dust filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a three-dimensional diagram of a fresh air dust removal device used in coal mining.

[0020] Figure 2 This is a side view of a fresh air dust removal device used in coal mining.

[0021] Figure 3 for Figure 2 Cross-sectional view at AA.

[0022] Figure 4 for Figure 3 A partial enlarged view of point B.

[0023] Figure 5 for Figure 3 A partial enlarged view of point C.

[0024] Figure 6 A three-dimensional structural analysis of a fresh air dust removal device for coal mining Figure 1 .

[0025] Figure 7 A three-dimensional structural analysis of a fresh air dust removal device for coal mining Figure 2 .

[0026] Figure 8 This is the front view of a fresh air dust removal device used in coal mining.

[0027] Figure 9 A new air dust removal device is used in a coal mine in the first working state. Figure 8 Cross-sectional view at DD.

[0028] Figure 10 A coal mine uses a fresh air dust removal device in the second working state along Figure 8 Cross-sectional view at DD.

[0029] Figure 11 for Figure 10 A partial enlarged view of point E.

[0030] Explanation of reference numerals: 1, housing; 1a, dust removal chamber; 1a1, mounting chamber; 1a2, inner gear ring; 1b, air inlet pipe; 1b1, dust suction pipe; 1b2, fan; 1b3, second rotary drive; 1c, air outlet pipe; 1d, rotary drive unit; 1d1, planetary gear; 1d2, gear rack; 1d3, shaft; 1d4, first rotary drive; 1d5, spiral scraper; 1d6, limit block; 2, dust filter; 2a, limit ring; 2a1, outer tooth groove; 2b, blocking disk; 2b1, first shaft hole; 2c, extension ring; 2c1, notch; 2c2, sealing cover; 2c3, second axial hole; 3, humidification component; 3a, humidification roller; 3a1, water absorption layer; 3a2, shaft head; 3a3, first driven gear; 3b, water tank; 3b1, water inlet pipe; 3b2, water outlet; 4, dust cleaning component; 4a, impurity removal pipe; 4a1, transfer chamber; 4a2, feed port; 4a3, discharge port; 4a4, rotating shaft; 4a5, separating blade; 4a6, second driven gear; 4b, guide channel; 4c, conveying channel; 4c1, material receiving pipe; 4d, conveyor belt. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figures 1 to 11 : A fresh air dust removal device for coal mine mining includes a housing 1, a dust removal chamber 1a is provided in the housing 1, the lower portion of the dust removal chamber 1a is connected to an air inlet pipe 1b, and the upper portion of the dust removal chamber 1a is connected to an air outlet pipe 1c. The dust removal chamber 1a is cylindrical, and a dust removal filter 2 is provided inside the dust removal chamber 1a of the housing 1. The dust removal filter 2 is annular and is rotatably mounted on the housing 1 via coaxially arranged limit rings 2a at both ends. The axis of the dust removal filter 2 is aligned with the axis of the dust removal chamber 1a. The gas sucked in by the air inlet pipe 1b passes through the dust filter 2 and flows to the air outlet pipe 1c. A humidifying component 3 and a cleaning component 4 are provided on the shell 1. The humidifying component 3 and the cleaning component 4 are respectively located on both sides of the connection between the dust removal chamber 1a and the air inlet pipe 1b. The humidifying component 3 is used to humidify the outer wall of the dust filter 2, and the cleaning component 4 is used to remove impurities attached to the outer wall of the dust filter 2. The shell 1 is provided with a rotating drive unit 1d for driving the dust filter 2 to rotate around its own axis.

[0033] When the present application is in use, the dust-laden airflow enters the cylindrical dust removal chamber 1a from the air inlet pipe 1b, passes through the annular dust filter 2 installed in the dust removal chamber 1a and flows to the air outlet pipe 1c. The rotary drive unit 1d drives the dust filter 2 to keep rotating during operation. The humidifying component 3 located on one side of the connection of the air inlet pipe 1b moistens the outer wall of the rotating dust filter 2. The mesh of the moistened annular filter 2 contains water droplets. When the dust-laden airflow passes through the moistened dust filter 2, the dust filter 2 can absorb more dust through moisture, thereby improving the dust removal efficiency and preventing dry dust from flying again due to airflow disturbance. The dust cleaning component 4 located on the other side of the connection of the air inlet pipe 1b contacts the outer wall of the dust filter 2 when the dust filter 2 rotates, removes the attached dust impurities, and the removed dust falls to the bottom of the dust removal chamber 1a. In this embodiment, the dust filter 2 is annular and coaxial with the dust chamber 1a. The limiting ring 2a ensures that the annular shape of the dust filter 2 is stable and always fits the inner wall of the dust chamber 1a. After the dust-laden airflow enters from the air inlet pipe 1b, it must radially pass through the dust filter 2, increasing the contact area and filtration path between the airflow and the dust filter 2, ensuring full contact between the dust-laden airflow and the dust filter 2. The humidifying component 3 keeps the dust filter 2 moist. When the dust contacts the moist dust filter 2, it will be more firmly adsorbed due to the viscosity of the water, thereby improving the dust removal efficiency. After the dust is removed, the gas is discharged to effectively avoid air pollution, improve the environmental protection effect in industrial and mining projects, and also protect the health of workers. The dust cleaning component 4 cooperates with the rotating dust filter 2 to remove dust from the surface of the dust filter 2 in real time, avoiding the dust filter 2 from increasing resistance and decreasing air volume due to dust accumulation.

[0034] In order to realize the problem of driving the dust filter 2 in the dust removal chamber 1a to rotate, the following features are specifically set: The shell 1 is provided with mounting cavities 1a1 at both ends of the dust removal chamber 1a, and the limiting ring 2a of the dust removal filter 2 is located in the mounting cavity 1a1. The limiting ring 2a is provided with an external tooth groove 2a1 surrounding the outer wall of the limiting ring 2a, and the inner wall of the mounting cavity 1a1 is provided with an internal tooth ring 1a2; the rotation drive unit 1d includes a plurality of planetary gears 1d1 located in the mounting cavity 1a1, and the planetary gears 1d1 are respectively meshed with the external tooth groove 2a1 and the internal tooth ring 1a2, and the planetary gears 1d1 are rotatably installed on the gear rack 1d2, and a shaft 1d3 is provided at the axis of the gear rack 1d2, and the shaft 1d3 is in the same straight line as the axis of the dust removal filter 2; the rotation drive unit 1d also includes a first rotation driver 1d4 fixedly installed on the outside of the shell 1, and the working end of the first rotation driver 1d4 is transmission connected to the shaft 1d3.

[0035] In this embodiment, after the first rotary driver 1d4, which is fixedly mounted on the exterior of the housing 1, is activated, it transmits power to the shaft 1d3. The first rotary driver 1d4 can be a servo motor, and the shaft 1d3 drives the gear rack 1d2 to rotate. Driven by the gear rack 1d2, several planetary gears 1d1 mounted on the gear rack 1d2 revolve along the inner gear ring 1a2 on the inner wall of the mounting cavity 1a1. Because the planetary gears 1d1 simultaneously engage with the outer tooth grooves 2a1 on the retaining ring 2a, the planetary gears 1d1 themselves rotate during their revolution, which in turn drives the retaining ring 2a through the outer tooth grooves 2a1. Because the dust filter 2 is mounted on the housing 1 via the retaining ring 2a, the rotation of the retaining ring 2a ultimately causes the dust filter 2 to rotate about its own axis within the dust removal cavity 1a. During this process, the rotation of the dust filter 2 evenly distributes dust on the filter surface. In conjunction with the humidification component 3 and the dust cleaning component 4, dust removal and cleaning operations are continuously and efficiently completed.

[0036] In order to achieve the purpose of humidifying the dust filter 2, the following features are specifically set: The humidifying assembly 3 includes a humidifying drum 3a rotatably mounted on one side of the dust removal chamber 1a, the axis of the humidifying drum 3a is parallel to the axis of the dust removal filter 2, the outer wall of the humidifying drum 3a is covered with a water absorption layer 3a1, and the side of the water absorption layer 3a1 close to the outlet pipe 1c is in contact with the outer wall of the dust removal filter 2, the shaft heads 3a2 coaxially arranged at both ends of the humidifying drum 3a are inserted into the shell 1, and a first driven gear 3a3 is coaxially arranged on the shaft head 3a2 at the end away from the rotation drive unit 1d, and the first driven gear 3a3 is meshed with the external tooth groove 2a1 on the limiting ring 2a of the dust removal filter 2; the humidifying assembly 3 also includes a water tank 3b mounted on the shell 1, a water inlet pipe 3b1 is provided at the top of the water tank 3b, and a water outlet 3b2 is provided at the bottom of the water tank 3b, the width of the water outlet 3b2 is smaller than the diameter of the humidifying drum 3a, and the water outlet 3b2 is in contact with the side of the humidifying drum 3a away from the dust removal chamber 1a.

[0037] In this embodiment, the water tank 3b is continuously filled with water through the water inlet pipe 3b1, and the water gathers at the water outlet 3b2 at the bottom. Since the water outlet 3b2 is attached to the side of the humidifying drum 3a away from the dust removal chamber 1a and its width is smaller than the diameter of the humidifying drum 3a, the water flow will evenly cover the surface of the humidifying drum 3a. The water-absorbing layer 3a1 covering the outer wall of the humidifying drum 3a can be a sponge, etc. The water-absorbing layer 3a1 absorbs water. When the dust filter 2 rotates under the drive of the rotary drive unit 1d, as the humidifying drum 3a rotates, the water-absorbing layer 3a1 near the outlet pipe 1c continues to adhere to the outer wall of the dust filter 2, transferring the absorbed water to the dust filter 2, so that the surface of the dust filter 2 remains moist, and each filter hole is stained with water droplets, thereby enhancing the dust adsorption capacity of the dust filter 2. Because the outer tooth groove 2a1 on the limit ring 2a meshes with the first driven gear 3a3 on the shaft head 3a2 at one end of the humidifying drum 3a, the humidifying drum 3a is automatically driven to rotate synchronously in the opposite direction when the dust filter 2 rotates, without the need for additional electrical components to drive it. The water absorption layer 3a1 of the humidifying drum 3a can continuously enter the water tank 3b for water replenishment, ensuring the wetness of the water absorption layer 3a1, thereby ensuring the humidification effect on the dust filter 2. In this embodiment, the humidifying drum 3a rotates synchronously with the dust filter 2, and the water absorption layer 3a1 always adheres to the outer wall of the filter. This ensures that during the rotation of the dust filter 2, an appropriate amount of moisture is continuously and evenly provided to the surface of the dust filter 2, preventing excessive humidity in the mine. The shaft heads 3a2 at both ends of the humidifying drum 3a are inserted into the housing 1, and the water absorption layer 3a1 is a sheathed structure. When the water absorption layer 3a1 becomes worn or its water absorption capacity decreases after a period of use, it can be easily removed and replaced. The water tank 3b is installed independently, and the connection between the water inlet pipe 3b1 and the water outlet 3b2 is relatively simple, which is convenient for daily water addition and maintenance work, and reduces the maintenance difficulty and cost of the equipment.

[0038] In order to achieve the purpose of real-time cleaning of the wet impurities filtered by the dust filter 2, the following features are specifically set: The dust removal assembly 4 includes a debris removal pipe 4a inserted into the air intake pipe 1b. The debris removal pipe 4a is located at one end of the air intake pipe 1b and is provided with a transfer chamber 4a1 with a circular cross section. The transfer chamber 4a1 is provided with a feed port 4a2 and a discharge port 4a3. The feed port 4a2 is connected to the air intake pipe 1b. The transfer chamber 4a1 is located on one side of the feed port 4a2 and is in contact with the outer wall of the dust removal filter 2. A rotating shaft 4a4 is rotatably installed in the transfer chamber 4a1. The axis of the rotating shaft 4a4 is in the same straight line and parallel to the axis of the transfer chamber 4a1. Along the axis of the dust removal chamber 1a, a number of partition blades 4a5 extending along the axis of the rotating shaft 4a4 are provided on the circumference of the rotating shaft 4a4, the top of the partition blade 4a5 is in contact with the inner wall of the transfer chamber 4a1, and a temporary storage chamber for transporting impurities is formed between two adjacent partition blades 4a5; the discharge port 4a3 located below the transfer chamber 4a1 is connected to the guide channel 4b located outside the impurity removal pipe 4a, and one end of the guide channel 4b is connected to the conveying channel 4c, and a conveyor belt 4d for conveying impurities is installed in the conveying channel 4c.

[0039] In this embodiment, as the dust filter 2 rotates, moist impurities adsorbed on its surface move with the filter to the side of the inlet pipe 1b. At this point, the inner wall of the transfer chamber 4a1 of the dust cleaning assembly 4, located on the side of the feed inlet 4a2, abuts against the outer wall of the dust filter 2. Impurities on the rotating dust filter 2 are scraped off to the feed inlet 4a2, enter the transfer chamber 4a1, and fall into the temporary storage chamber formed between two adjacent partition blades 4a5 on the rotating shaft 4a4. As the rotating shaft 4a4 rotates, the temporary storage chamber temporarily stores the impurities entering the transfer chamber 4a1 and sequentially transfers them to the discharge port 4a3. After exiting the discharge port 4a3, the impurities enter the conveying channel 4c through the guide channel 4b. Driven by the conveyor belt 4d within the conveying channel 4c, they are continuously transported to a designated location for centralized processing, thereby achieving real-time cleaning of moist impurities filtered by the dust filter 2 and ensuring the continuous and efficient operation of the dust filter 2. The top end of the partition blade 4a5 fits against the inner wall of the transfer chamber 4a1 to prevent the gas in the air inlet pipe 1b from leaking through the transfer chamber 4a1, thereby ensuring the directional movement of the airflow.

[0040] In order to achieve continuous rotation of the rotating shaft 4a4 without using additional electrical components, the following features are specifically set: One end of the rotating shaft 4a4 away from the rotary drive unit 1d extends into the installation cavity 1a1 and is coaxially mounted with a second driven gear 4a6. The second driven gear 4a6 is meshed and connected with the external tooth groove 2a1 on the limiting ring 2a.

[0041] In this embodiment, when the rotary drive unit 1d drives the retaining ring 2a, which in turn rotates the dust filter 2, the second driven gear 4a6 at the end of the rotating shaft 4a4, which extends into the mounting cavity 1a1, engages with the external tooth groove 2a1 on the retaining ring 2a. As the retaining ring 2a rotates, the second driven gear 4a6 is synchronously driven, causing the rotating shaft 4a4 to rotate about its own axis within the transfer cavity 4a1. The rotation of the rotating shaft 4a4 also synchronizes the rotation of the surrounding partition blades 4a5. As the temporary storage cavity formed by adjacent partition blades 4a5 rotates, it passes through the feed inlet 4a2 and the discharge outlet 4a3.

[0042] In order to facilitate the uniform movement of the cleaned impurities to the conveyor belt 4d in the conveying channel 4c, the following features are specifically set: The axis of the dust removal chamber 1a is tilted, the guide channel 4b extends tilted along the axis of the dust removal chamber 1a, and the conveying channel 4c is located at the lower end of the guide channel 4b.

[0043] In this embodiment, since the axis of the dust removal chamber 1a is tilted, when the partition blades 4a5 of the cleaning assembly 4 discharge the moist impurities filtered by the dust filter 2 from the discharge port 4a3 of the transfer chamber 4a1, the impurities enter the guide channel 4b. The guide channel 4b extends obliquely along the axis of the dust removal chamber 1a. Under the action of gravity, the impurities will automatically slide toward the lower end along the inclined inner wall of the guide channel 4b. The conveying channel 4c is located at the lower end of the guide channel 4b. When the impurities slide to the end of the guide channel 4b, they fall directly onto the conveyor belt 4d in the conveying channel 4c. The conveyor belt 4d transports the collected impurities to a designated location for processing. The entire process does not require an additional power device to push the impurities to move. It relies solely on gravity to achieve the automatic transfer of impurities from the dust removal chamber 1a to the conveyor belt 4d, ensuring that the impurities move uniformly to the conveyor belt 4d to complete efficient cleaning.

[0044] Since some impurity particles are small, they may contact the water droplets in the filter holes of the dust filter 2 and be carried by the airflow and pass through the dust filter 2 and adhere to its inner wall. In order to clean the inner wall of the dust filter 2, the following features are specifically set: The shaft 1d3 extends to the inside of the dust filter 2 , and a plurality of spiral scrapers 1d5 are provided around the shaft 1d3 , and the spiral scrapers 1d5 are in contact with the inner wall of the dust filter 2 .

[0045] In this embodiment, when the first rotary driver 1d4 of the rotary drive unit 1d is started, the gear rack 1d2 is driven to rotate through the shaft 1d3, thereby driving the dust filter 2 to rotate. At this time, the shaft 1d3 extending to the inside of the dust filter 2 also rotates synchronously. The spiral scraper 1d5 arranged on the side of the shaft 1d3 is in contact with the inner wall of the dust filter 2, and is driven by the shaft 1d3 to rotate along the inner wall of the dust filter 2. After contacting the water droplets in the filter holes of the dust filter 2, some smaller impurity particles are driven by the airflow to pass through the filter and adhere to its inner wall. As the dust filter 2 and the spiral scraper 1d5 rotate, the spiral scraper 1d5 will scrape off the impurities attached to the inner wall of the dust filter 2. The dust removal effect of the dust filter 2 is guaranteed. Since the dust filter 2 is set at an angle, the scraped impurities slide along the spiral trajectory of the spiral scraper 1d5 under the action of gravity, and finally fall to the bottom of the inside of the dust filter 2. In order to discharge the impurities cleaned out of the dust filter 2, the following features are specifically set: The higher end of the dust filter 2 is blocked by a blocking disk 2b, and a first axial hole 2b1 for avoiding the shaft rod 1d3 is provided at the axis of the blocking disk 2b. The lower end of the dust filter 2 is provided with an extension ring 2c, which extends to the outside of the installation cavity 1a1. A notch 2c1 is provided at the bottom of the extension ring 2c, and the opening of the extension ring 2c is blocked by a coaxial blocking cover 2c2; a material receiving pipe 4c1 is provided on the conveying channel 4c, and the material receiving pipe 4c1 extends vertically to the bottom of the notch 2c1.

[0046] Because the axis of the dust removal chamber 1a is tilted, the dust filter 2 is also tilted. Its higher end is blocked by a blocking disk 2b. The first axial hole 2b1 on the blocking disk 2b allows the shaft 1d3 to pass through, ensuring the normal rotation of the shaft 1d3. The extension ring 2c set at the lower end extends to the outside of the installation chamber 1a1. The bottom notch 2c1 serves as an impurity discharge channel, which is closed by a blocking cover 2c2 when the equipment is performing dust removal. When the spiral scraper 1d5 scrapes impurities from the inner wall of the dust filter 2, the impurities slide downward along a spiral trajectory under the action of gravity and eventually converge into the extension ring 2c at the lower end of the dust filter 2. Workers can periodically open the blocking cover 2c2 when the equipment is not in operation, and impurities will fall through the notch 2c1. The material receiving pipe 4c1 on the conveying channel 4c is vertically arranged below the notch 2c1. Impurities fall directly into the material receiving pipe 4c1 through the notch 2c1 and are then conveyed to the conveyor belt 4d in the conveying channel 4c. The conveyor belt 4d transports the impurities cleaned from the inner wall of the dust removal filter 2 and the impurities collected by the cleaning component 4 to a designated location for centralized processing, thereby achieving efficient discharge of the impurities.

[0047] In order to ensure that impurities in the dust filter 2 are discharged in a directional manner through the notch 2c1, the following features are specifically set: A limit block 1d6 is coaxially provided at one end of the shaft 1d3 away from the first rotary driver 1d4, and a second axial hole 2c3 is provided at the axis of the blocking cover 2c2, which is in the same straight line as the shaft 1d3. The blocking cover 2c2 is sleeved on the shaft 1d3 through the second axial hole 2c3. When the blocking cover 2c2 moves to fit the limit block 1d6, the notch 2c1 is released and the opening of the extension ring 2c is kept blocked.

[0048] In this embodiment, when the equipment is in operation, the blocking cover 2c2 is sleeved on the shaft 1d3 through the second axial hole 2c3, and cooperates with any locking structure to tightly seal the opening of the extension ring 2c to prevent impurities from leaking. When it is necessary to discharge impurities in the dust filter 2, the staff pushes the blocking cover 2c2 along the direction of the shaft 1d3. When the blocking cover 2c2 is in contact with the limit block 1d6, the notch 2c1 is released. At this time, the impurities in the dust filter 2 cleaned by the spiral scraper 1d5 are discharged in a direction through the notch 2c1 to the receiving pipe 4c1 below under the action of gravity. At this time, the blocking cover 2c2 still maintains the blockage of other parts of the opening of the extension ring 2c except the notch 2c1 to prevent impurities from scattering from other locations.

[0049] In order to enable the air intake pipe 1b to absorb the dusty air in the mine, the following features are specifically set: A dust collection duct 1b1 is installed at the air inlet pipe 1b, and a fan 1b2 and a second rotation driver 1b3 for driving the fan 1b2 to rotate are arranged in the dust collection duct 1b1.

[0050] In this embodiment, the second rotary actuator 1b3 can be a servo motor. When activated, the output power of the second rotary actuator 1b3 drives the fan 1b2 within the dust collection duct 1b1 to rotate at high speed. As the fan 1b2 rotates, its blades push air, creating a negative pressure area at the entrance of the dust collection duct 1b1. Because the air pressure in underground coal mine working spaces is relatively high, this pressure differential draws dust-laden air from the mine into the dust collection duct 1b1 for subsequent dust removal.

[0051] Working principle: When in use, the dust-laden airflow enters the cylindrical dust removal chamber 1a from the air inlet pipe 1b, passes through the annular dust removal filter 2 installed in the dust removal chamber 1a and flows to the air outlet pipe 1c. The rotary drive unit 1d drives the dust removal filter 2 to keep rotating during operation. The humidifying component 3 located on one side of the connection of the air inlet pipe 1b moistens the outer wall of the rotating dust removal filter 2. There are water droplets in the mesh of the moistened annular filter 2. When the dust-laden airflow passes through the moistened dust removal filter 2, the dust removal filter 2 can absorb more dust through moisture. The cleaning component 4 located on the other side of the connection of the air inlet pipe 1b contacts the outer wall of the dust removal filter 2 when the dust removal filter 2 rotates, and removes the attached dust impurities.

[0052] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A fresh air dust removal device for coal mining, comprising a housing (1), a dust removal chamber (1a) provided in the housing (1), the lower portion of the dust removal chamber (1a) being connected to an air inlet pipe (1b), and the upper portion of the dust removal chamber (1a) being connected to an air outlet pipe (1c), characterized in that: The dust removal chamber (1a) is cylindrical. A dust removal filter (2) is provided inside the dust removal chamber (1a) of the housing (1). The dust removal filter (2) is annular. The dust removal filter (2) is rotatably mounted on the housing (1) via limiting rings (2a) coaxially provided at both ends. The axis of the dust removal filter (2) is on the same straight line as the axis of the dust removal chamber (1a). The gas sucked in by the air inlet pipe (1b) passes through the dust removal filter (2) and flows to the air outlet pipe (1c). The housing (1) A humidifying component (3) and a dust cleaning component (4) are provided on the housing (1), and the humidifying component (3) and the dust cleaning component (4) are respectively located on both sides of the connection between the dust removal chamber (1a) and the air inlet pipe (1b). The humidifying component (3) is used to humidify the outer wall of the dust removal filter (2), and the dust cleaning component (4) is used to remove impurities attached to the outer wall of the dust removal filter (2). A rotating drive unit (1d) is provided on the housing (1) for driving the dust removal filter (2) to rotate around its own axis.

2. A fresh air dust removal device for coal mining according to claim 1, characterized in that: The housing (1) is provided with mounting cavities (1a1) at both ends of the dust removal cavity (1a); a limiting ring (2a) of the dust removal filter (2) is located in the mounting cavity (1a1); an outer tooth groove (2a1) surrounding the outer wall of the limiting ring (2a) is provided on the limiting ring (2a); and an inner tooth ring (1a2) is provided on the inner wall of the mounting cavity (1a1); The rotary drive unit (1d) comprises a plurality of planetary gears (1d1) located in the mounting cavity (1a1), the planetary gears (1d1) being meshedly connected with the outer tooth groove (2a1) and the inner gear ring (1a2), the planetary gears (1d1) being rotatably mounted on the gear rack (1d2), a shaft (1d3) being provided at the axis of the gear rack (1d2), and the shaft (1d3) being aligned with the axis of the dust filter (2); The rotary drive unit (1d) further comprises a first rotary drive (1d4) fixedly mounted on the outside of the housing (1), wherein the working end of the first rotary drive (1d4) is in transmission connection with the shaft (1d3).

3. A fresh air dust removal device for coal mining according to claim 2, characterized in that: The humidifying assembly (3) includes a humidifying roller (3a) rotatably mounted on one side of the dust removal chamber (1a), the axis of the humidifying roller (3a) is parallel to the axis of the dust removal filter (2), the outer wall of the humidifying roller (3a) is coated with a water-absorbing layer (3a1), the side of the water-absorbing layer (3a1) close to the air outlet pipe (1c) is in contact with the outer wall of the dust removal filter (2), the shaft heads (3a2) coaxially arranged at both ends of the humidifying roller (3a) are inserted into the housing (1), and a first driven gear (3a3) is coaxially arranged on the shaft head (3a2) at one end away from the rotary drive unit (1d), and the first driven gear (3a3) is meshed with the outer tooth groove (2a1) on the limiting ring (2a) of the dust removal filter (2); The humidifying assembly (3) further comprises a water tank (3b) mounted on the housing (1); a water inlet pipe (3b1) is provided at the top of the water tank (3b); a water outlet (3b2) is provided at the bottom of the water tank (3b); the width of the water outlet (3b2) is smaller than the diameter of the humidifying roller (3a); the water outlet (3b2) is in contact with a side of the humidifying roller (3a) away from the dust removal chamber (1a).

4. A fresh air dust removal device for coal mining according to claim 2, characterized in that: The dust removal component (4) includes a dust removal pipe (4a) inserted into the air intake pipe (1b), and a transfer chamber (4a1) with a circular cross section is provided at one end of the dust removal pipe (4a) located in the air intake pipe (1b). The transfer chamber (4a1) is provided with a feed port (4a2) and a discharge port (4a3). The feed port (4a2) is connected to the air intake pipe (1b), and the transfer chamber (4a1) is located on one side of the feed port (4a2) and is in contact with the outer wall of the dust removal filter (2). A rotating shaft (4a4) is rotatably mounted in (4a1), the axis of the rotating shaft (4a4) and the axis of the transfer chamber (4a1) are in the same straight line and are parallel to the axis of the dust removal chamber (1a), a plurality of partition blades (4a5) extending along the axis of the rotating shaft (4a4) are provided on the circumference of the rotating shaft (4a4), the top ends of the partition blades (4a5) are in contact with the inner wall of the transfer chamber (4a1), and a temporary storage chamber for transporting impurities is formed between two adjacent partition blades (4a5); The discharge port (4a3) located below the transfer chamber (4a1) is connected to a guide channel (4b) located outside the impurity removal pipeline (4a); one end of the guide channel (4b) is connected to a conveying channel (4c); and a conveying belt (4d) for conveying impurities is installed in the conveying channel (4c).

5. A fresh air dust removal device for coal mining according to claim 4, characterized in that: One end of the rotating shaft (4a4) away from the rotary drive unit (1d) extends into the installation cavity (1a1) and is coaxially mounted with a second driven gear (4a6), which is meshedly connected with the outer tooth groove (2a1) on the limiting ring (2a).

6. A fresh air dust removal device for coal mining according to claim 4, characterized in that: The axis of the dust removal chamber (1a) is arranged at an angle, the guide channel (4b) extends at an angle along the axis of the dust removal chamber (1a), and the conveying channel (4c) is located at the lower end of the guide channel (4b).

7. A fresh air dust removal device for coal mining according to claim 6, characterized in that: The shaft (1d3) extends to the interior of the dust removal filter (2), and a plurality of spiral scrapers (1d5) are provided on the circumference of the shaft (1d3), and the spiral scrapers (1d5) are in contact with the inner wall of the dust removal filter (2).

8. A fresh air dust removal device for coal mining according to claim 7, characterized in that: The higher end of the dust filter (2) is blocked by a blocking disk (2b), and a first axial hole (2b1) for avoiding the shaft rod (1d3) is provided at the axis of the blocking disk (2b). An extension ring (2c) is provided at the lower end of the dust filter (2), and the extension ring (2c) extends to the outside of the installation cavity (1a1). A notch (2c1) is provided at the bottom of the extension ring (2c), and the opening of the extension ring (2c) is blocked by a coaxially arranged blocking cover (2c2); A material receiving pipe (4c1) is provided on the conveying channel (4c), and the material receiving pipe (4c1) extends vertically to below the notch (2c1).

9. A fresh air dust removal device for coal mining according to claim 8, characterized in that: A limiting block (1d6) is coaxially arranged at one end of the shaft (1d3) away from the first rotary driver (1d4); a second axial hole (2c3) is arranged at the axis of the blocking cover (2c2) and is on the same straight line as the shaft (1d3); the blocking cover (2c2) is sleeved on the shaft (1d3) through the second axial hole (2c3); when the blocking cover (2c2) moves to fit the limiting block (1d6), the notch (2c1) is released and the opening of the extension ring (2c) is kept blocked.

10. The fresh air dust removal device for coal mining according to claim 1, characterized in that: A dust collection pipe (1b1) is installed at the air inlet pipe (1b), and a fan (1b2) and a second rotary driver (1b3) for driving the fan (1b2) to rotate are arranged in the dust collection pipe (1b1).

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