A mine excavation face long pressure short extraction wind dust removal device and method

Abstract

The present application relates to the technical field of dust removal on mining excavation faces, and in particular to a device and method for dust removal on mining excavation faces using long-pressure and short-extraction air. By providing two symmetrical air inlet pipes and corresponding dust exhaust pipes, and a converging mechanism installed on the dust exhaust pipes, the dust inside the tunnel can be effectively raised during the long-pressure and short-extraction air dust removal process, and the raised dust can be gathered toward the inlet of the dust suction pipe through the cooperation of a conveyor belt and a converging plate, significantly reducing the possibility of dust overflowing toward the tunnel outlet. At the same time, the wind curtain formed inside the arc tube can actively block the raised dust, thereby combining the dual mechanisms of active convergence and passive blocking to not only improve the dust removal efficiency, but also effectively reduce the risk of dust overflow.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal on mining excavation faces, and in particular to a long-pressure, short-extraction, split-air dust removal device and method for mining excavation faces. Background Art

[0002] The large amount of dust generated during mining not only harms the health of workers, but also affects equipment operation, increases maintenance costs and reduces production efficiency. The harmful substances contained in this dust, such as quartz and clay minerals, seriously threaten the respiratory system of workers.

[0003] In view of this, in order to effectively control and reduce the dust generated during the excavation process, reduce the impact on workers' health and prevent dust from causing damage to mechanical equipment, it is necessary to develop a mine excavation face dust removal technology and equipment that moves synchronously with the excavation head. This is of great significance for improving the safety and production efficiency of the mine working environment and reducing environmental pollution. It has also become a key technical problem that needs to be urgently solved in this technical field.

[0004] The patent application with publication number CN118499058A discloses a long-pressure short-extraction process in coal mines. A fresh air positive pressure flexible duct is set on one side of the tunnel, and fresh air is sent to the excavation working face through an external fan. A dust control positive pressure flexible duct is set on the other side. The mixed gas in the tunnel is extracted through a gas induced dust control device to reduce dust. The inlet of the dust control duct is within 5 meters from the excavation working face, and the distance between the fresh air duct and the tail of the dust control duct is not less than 10 meters. This process combines long-pressure short-extraction with induced dust control, effectively reducing dust and gas concentrations, keeping the working environment clean and safe, and the total dust reduction efficiency is greater than 95%.

[0005] Although the above-mentioned prior art adopts the method of long pressure and short extraction to extract the dust inside the alley, the airflow pumped out from the end of the fresh air positive pressure flexible wind tube may contact the end face of the alley and then flow back, and then the return airflow drives the dust to move through the alley to the alley entrance, causing the dust to fall randomly at the alley entrance, affecting the dust removal and collection effect.

[0006] Furthermore, based on the above reasons, the patent application with publication number CN222010270U discloses an air separation and dust removal device based on the principle of long pressure and short extraction. By adjusting the opening and closing plate on the inner side of the air separation box, the air volume of the two air outlets of the positive pressure wind tube can be controlled, thereby reducing wind flow disturbance and blocking dust from spreading outward. It can effectively control the concentration of dust in the tunnel during the cutting of the full-rock comprehensive excavation working face.

[0007] However, the following shortcomings still exist when using the above-mentioned prior art: the above-mentioned device can only passively block the dust that spreads outward, and cannot fundamentally reduce the possibility of dust spreading outward, thereby causing the possibility of dust still spreading outward, affecting the dust removal effect inside the tunnel.

[0008] Based on this, the existing method of removing dust inside the tunnel needs to be improved. Summary of the invention

[0009] In order to solve the above technical problems, the present application provides a mine excavation face long pressure short extraction wind dust removal device and method, which adopts the following technical solutions:

[0010] In a first aspect, a long-pressure, short-extraction air dust removal device for a mine excavation face includes two symmetrically arranged air inlet pipes and dust exhaust pipes corresponding to the air inlet pipes one by one, and a converging mechanism is installed on the dust exhaust pipes.

[0011] The converging mechanism comprises: two dust suction pipes, which are arranged and correspond to the dust exhaust pipes one by one, and are connected with the corresponding dust exhaust pipes.

[0012] Two rotating rollers are provided and are symmetrically arranged along the length direction of the dust suction pipe and arranged between the two dust suction pipes.

[0013] The conveyor belt is installed between two rotating rollers, and a plurality of convergence plates are evenly arranged on the conveyor belt along the transmission direction thereof.

[0014] The air inlet pipes are all connected with blast pipes, and the blast pipes are commonly provided with arc pipes connected thereto, and the arc pipes are evenly provided with multiple through grooves along their circumferences. An injection pipe is also provided between the two blast pipes, and a linkage frame is commonly installed between the blast pipe and the dust suction pipe on the corresponding side.

[0015] Preferably, a rectangular cavity is provided between the dust suction pipe and the dust exhaust pipe, and a driving shaft corresponding to the rotating roller is rotatably installed on the opposite surface of the rectangular cavity through a bearing, and the end of the driving shaft away from the corresponding rectangular cavity is connected to the corresponding rotating roller, and the driving shaft is located inside the corresponding rectangular cavity and has multiple blades evenly arranged along its circumference.

[0016] Preferably, the converging plate is composed of a plurality of slidably connected rectangular plates, and a yielding arc plate is provided at one end of the rectangular plate away from the conveyor belt.

[0017] Preferably, the jet pipes are provided in plurality and are evenly arranged along the length direction of the blast pipe, and both ends of the jet pipes are respectively installed on the blast pipes on the corresponding sides, and the jet pipes are evenly provided with a plurality of jet ports along the length direction thereof.

[0018] Preferably, an air suction pipe matching the arc-shaped pipe is installed between the dust suction pipes, and a through groove is provided on one side of the air suction pipe close to the arc-shaped pipe.

[0019] Preferably, the arc-shaped tube is provided with a spray head between adjacent through grooves, and an inclined baffle is provided on the side of the air suction tube away from the converging mechanism.

[0020] Preferably, the back sides of the dust suction tubes are provided with connecting protrusions, and the inside of the suction tube is provided with a pulling rod extending along its length direction and moving back and forth, and both ends of the pulling rod pass through the dust suction tube on the corresponding side and are slidably arranged on the connecting protrusions on the corresponding side, and a plurality of annular scrapers are evenly arranged on the pulling rod along its length direction through supporting protrusions.

[0021] Preferably, a fixed protrusion is installed on any of the dust suction pipes, a linkage rod is slidably provided on the fixed protrusion, a reset spring is sleeved on the linkage rod for resetting it, and the reset spring is installed on the fixed protrusion, a driving shaft closest to the suction pipe and close to the fixed protrusion passes through the back side of the corresponding rectangular cavity, and a swing rod is installed on the circumferential surface of the driving shaft passing through the back side of the corresponding rectangular cavity, an adjusting block is provided at one end of the linkage rod close to the swing rod, a resistance block is provided at one end of the linkage rod away from the swing rod, an adjusting connecting block matching with the linkage rod is installed at one end of the insertion and withdrawal rod close to the linkage rod, a telescopic spring is provided at one end of the insertion and withdrawal rod close to the adjusting connecting block, and both ends of the telescopic spring are respectively connected with the adjusting connecting block and the fixed protrusion.

[0022] Preferably, arc-shaped heating plates are evenly installed on the circumferential surface of the suction pipe along its length direction.

[0023] In the second aspect, a method for dust removal by long-pressure and short-extraction air separation at a mine excavation face is provided, and its use method comprises the following steps: S1: dust removal preparation, connecting the linkage frame to the existing excavation head.

[0024] S2: Dust prevention treatment, pump gas into the air inlet pipe, the gas enters the arc pipe and the blast pipe respectively, the gas inside the arc pipe enters the tunnel through the through groove to form a wind curtain.

[0025] S3: Dust gathering, the dust is gathered by the cooperation between the conveyor belt and the gathering plate.

[0026] S4: Dust collection, collect the gathered and blown dust through the dust suction pipe.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. In the process of long-pressure short-extraction dust removal, the blast pipe can lift the dust inside the tunnel, and the conveyor belt and the convergence plate are used together to gather the raised dust to the inlet of the dust suction pipe, reducing the chance of dust overflowing to the tunnel outlet; the wind curtain formed by the blasted airflow inside the arc tube can passively block the raised dust, and then through the combination of active convergence and passive blocking mechanisms, the efficiency of dust removal is guaranteed, while reducing the possibility of dust overflow.

[0029] 2. The through grooves and the sprinkler heads designed in the present invention cooperate with each other to form a wind curtain with water mist, which can effectively absorb the dust and further reduce the possibility of dust spilling out. The setting of the suction pipe can absorb the gas in the wind curtain while maintaining the continuity of the wind curtain, avoiding the air flow speed away from the arc tube from slowing down, causing the wind curtain to fail to form a continuous barrier and thus causing the possibility of dust spilling out from there.

[0030] 3. Use the jet pipe and jet nozzle device to further gather and process the dust, improve the dust removal effect inside the tunnel, and further ensure the cleanliness of the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the three-dimensional installation structure between the arc tube and the sprinkler head of the present invention.

[0033] Figure 3 It is a schematic diagram of the three-dimensional installation structure between the rectangular cavity, the drive shaft and the blades of the present invention.

[0034] Figure 4 It is a schematic diagram of the second three-dimensional structure of the present invention.

[0035] Figure 5 It is a schematic diagram of the three-dimensional installation structure among the dust suction pipe, the fixing protrusion and the linkage rod etc. of the present invention.

[0036] Figure 6 The present invention Figure 5 A partial enlarged view of point A in the middle.

[0037] Figure 7 It is a schematic diagram of the internal structure of the air suction pipe of the present invention.

[0038] Figure 8 It is a schematic diagram of the three-dimensional installation structure between the rectangular block, the connecting frame and the exhaust pipe of the present invention.

[0039] Fig. 9 It is a flow chart of the mine excavation face long pressure short extraction wind dust removal method of the present invention.

[0040] Description of reference numerals: 1, air inlet pipe; 11, blast pipe; 111, rectangular block; 112, connecting frame; 113, exhaust pipe; 12, arc pipe; 121, sprinkler head; 13, through slot; 14, jet pipe; 15, linkage frame; 2, dust exhaust pipe; 3, convergence mechanism; 31, dust suction pipe; 311, rectangular cavity; 312, drive shaft; 313, blade; 32, rotating roller; 33, conveyor belt; 3 4. Converging plate; 341. Rectangular plate; 342. Yielding arc plate; 35. Air suction pipe; 351. Through slot; 352. Baffle; 353. Arc heating plate; 36. Insertion and extraction rod; 361. Annular scraper; 362. Fixed protrusion; 363. Linkage rod; 364. Return spring; 365. Swing rod; 366. Adjustment block; 367. Resistance block; 368. Adjustment connecting block; 369. Telescopic spring. DETAILED DESCRIPTION

[0041] The following is combined with Figures 1 to 9 This application is described in further detail.

[0042] The embodiment of the present application discloses a long-pressure, short-extraction air dust removal device and method for a mine excavation face. By combining the two mechanisms of active convergence and passive blocking, the efficiency of dust removal in the tunnel is effectively improved, ensuring that dust can be collected in a timely and effective manner, while significantly reducing the possibility of dust overflowing to other areas of the tunnel, thereby improving the working environment and ensuring the health and safety of workers.

[0043] Embodiment 1:

[0044] Reference Figure 1 as well as Figure 2 A long-pressure, short-extraction air dust removal device for a mine excavation face comprises two symmetrically arranged air inlet pipes 1 and dust exhaust pipes 2 corresponding to the air inlet pipes 1 one by one, and a converging mechanism 3 is installed on the dust exhaust pipes 2.

[0045] The converging mechanism 3 includes: two dust suction pipes 31 , which are provided and correspond one to one with the dust exhaust pipes 2 , and are connected with the corresponding dust exhaust pipes 2 .

[0046] Two rotating rollers 32 are provided and are symmetrically arranged along the length direction of the dust suction pipe 31 and are arranged between the two dust suction pipes 31 .

[0047] The conveyor belt 33 is installed between the two rotating rollers 32, and a plurality of convergence plates 34 are evenly arranged on the conveyor belt 33 along the transmission direction thereof.

[0048] The air inlet pipes 1 are all connected with a blast pipe 11, and the blast pipes 11 are commonly provided with an arc pipe 12 connected thereto, and the arc pipe 12 is evenly provided with a plurality of through grooves 13 along its circumference, and a jet pipe 14 is also provided between the two blast pipes 11, and a linkage frame 15 is commonly installed between the blast pipe 11 and the dust suction pipe 31 on the corresponding side.

[0049] The conveyor belt 33 is used in conjunction with the converging plate 34 to converge the raised dust to the inlet of the dust suction pipe 31, thereby reducing the chance of dust overflowing to the tunnel outlet; the wind curtain formed by the blasted airflow of the arc tube 12 can passively block the raised dust, and the wind curtain isolates the tunnel excavation end from the tunnel entrance, thereby ensuring the efficiency of dust removal through the combination of active convergence and passive blocking mechanisms, while reducing the possibility of dust overflow.

[0050] The dust exhaust pipe 2 and the air inlet pipe 1 are both made of elastic materials and are long enough, so it can be ensured that the dust exhaust pipe 2 and the air inlet pipe 1 can move synchronously when the linkage frame 15 drives the dust suction pipe 31 and the blast pipe 11 to move. During specific operation, the linkage frame 15 is fixedly connected to the existing tunneling head (which is the prior art, so it is not described again and is not shown in the figure). During the process of drilling into the tunnel, the tunneling head synchronously drives the blast pipe 11 and the dust suction pipe 31 to move through the linkage frame 15. At this time, air flow is blown into the air inlet pipe 1 through the existing air pump, and air flow is blown into the blast pipe 11 through the air inlet pipe 1. After entering the tunnel, the air flow can lift up the dust generated during the excavation process, so that the dust gathers at the inlet of the dust suction pipe 31.

[0051] At this time, the airflow inside the air inlet pipe 1 enters the blast pipe 11, and the airflow inside the blast pipe 11 is discharged into the tunnel through the through groove 13. The airflow forms a wind curtain inside the tunnel to passively block the raised dust and reduce the possibility of the raised dust overflowing to the tunnel entrance.

[0052] In order to improve the gathering effect of the raised dust, the conveyor belt 33 and the gathering plate 34 provided by the present invention can further gather the raised dust. Specifically, the rotating roller 32 is driven to rotate by an external driving force (motor, etc.), and the rotating roller 32 drives the conveyor belt 33 to transmit during the rotation, and then the conveyor belt 33 drives the gathering plate 34 to move along the transmission direction of the conveyor belt 33. During the movement of the gathering plate 34, the raised dust can be fanned and gathered toward the inlet of the dust collection pipe 31, so as to avoid the dust at the bottom of the alley being too far away from the inlet of the dust collection pipe 31, resulting in incomplete dust collection by the dust collection pipe 31, and then the efficiency of dust removal is guaranteed by the combination of active gathering and passive blocking. At the same time, the possibility of dust overflow is reduced.

[0053] The gas is then pumped out through the dust exhaust pipe 2, so that there is a pressure difference between the inside and outside of the dust exhaust pipe 2, and the raised dust can be pressed into the dust exhaust pipe 2 through the dust suction pipe 31, so that the dust inside the tunnel is discharged outward.

[0054] The gas directions of the air inlet pipe 1 and the dust exhaust pipe 2 are as follows: Figure 4 As shown by the arrow, the converging plate 34 is made of a light material.

[0055] Reference Figure 3In order to reduce the use of external drive, the driving shaft 312 and the blades 313 provided in the present invention cooperate with each other to drive the rotating roller 32 to rotate through the airflow. Specifically, a rectangular cavity 311 is further provided between the dust suction pipe 31 and the dust exhaust pipe 2. The driving shaft 312 corresponding to the rotating roller 32 is rotatably installed on the opposite surface of the rectangular cavity 311 through a bearing. The end of the driving shaft 312 away from the corresponding rectangular cavity 311 is connected to the corresponding rotating roller 32. The driving shaft 312 is located in the inner part of the corresponding rectangular cavity 311 and has a plurality of blades 313 evenly arranged along its circumference.

[0056] The rectangular cavity 311 can provide enough space for the circumferentially rotating blades 313 to ensure that the blades 313 can rotate freely. In order to improve the dust removal effect of the dust inside the tunnel, the airflow pressure inside the dust exhaust pipe 2 is large enough. During operation, the airflow passes through the rectangular cavity 311 when flowing from the dust suction pipe 31 to the dust exhaust pipe 2. At this time, the blades 313 hinder the flow of airflow. In order to overcome the resistance of the blades 313, the airflow drives the blades 313 to rotate. During the rotation of the blades 313, the drive shaft 312 is driven to rotate. During the rotation of the drive shaft 312, the rotating roller 32 is driven to rotate. During the rotation of the rotating roller 32, the conveyor belt 33 is driven to transmit.

[0057] Therefore, the rotating roller 32 can be driven to rotate in the above manner without external force (that is, through the airflow inside the dust suction tube 31 itself), thereby reducing the use of existing drives.

[0058] In the above steps, the pumped airflow of the air inlet pipe 1 and the exhausted airflow of the dust exhaust pipe 2 are large enough, thereby ensuring that the loss of airflow entering other components (such as the arc pipe 12, etc.) during the flow process can be compensated, and the air pressure inside the blast pipe 11 and the dust suction pipe 31 is large enough to ensure that the dust can be raised and extracted from the inside of the tunnel.

[0059] Reference Figure 1 as well as Figure 4 Since the tunnel has a certain height, in order to enable the converging plate 34 to converge and fan the dust at different depths, the converging plate 34 provided by the present invention can be lengthened. Specifically, the converging plate 34 is composed of a plurality of slidingly plugged rectangular plates 341, and a yielding arc plate 342 is provided at one end of the rectangular plate 341 away from the conveyor belt 33.

[0060] The rectangular plate 341 can be fully pulled out when inverted, and can be fully retracted when placed upright, and the height of the yielding arc plate 342 when the rectangular plate 341 is placed upright is slightly lower than the height of the top of the tunnel, so as to ensure that the rectangular plate 341 does not collide with the top of the tunnel, and at the same time, the gap at the top of the rectangular plate 341 can be blocked, so that a relatively isolated space is formed between the top of the conveyor belt 33 and the top of the tunnel. In the process of the convergence plate 34 moving from the bottom of the conveyor belt 33 to the top of the conveyor belt 33, when the convergence plate 34 crosses the plane formed by the axes of the two rotating rollers 32 and the yielding arc plate 342 does not contact the top of the tunnel, the rectangular plate 341 has been fully retracted, avoiding the possibility of the rectangular plate 341 not being retracted in time and having a rigid collision with the top of the tunnel. During specific operation, when the conveyor belt 33 drives the convergence plate 34 to move underneath it, the rectangular plate 341 is fully unfolded. At this time, the rectangular plate 341 and the yielding arc plate 342 cooperate with each other to converge and fan the dust inside the tunnel, so that the dust moves to the inlet of the dust suction pipe 31.

[0061] When the conveyor belt 33 drives the converging plate 34 to move above it, the rectangular plate 341 is completely retracted, and the converging plate 34 can be made lengthened so that it will not collide with the top of the tunnel when moving above the conveyor belt 33, thus saving space, and the converging plate 34 can be extended to a sufficiently long distance to converge and fan the dust inside the tunnel when moving below the conveyor belt 33.

[0062] Reference Figure 4 There are multiple air jet pipes 14 and they are evenly arranged along the length direction of the blast pipe 11, and both ends of the air jet pipe 14 are respectively installed on the blast pipe 11 on the corresponding side, and multiple air jet ports are evenly opened on the air jet pipe 14 along its length direction.

[0063] The gas enters the jet pipe 14 through the blast pipe 11 , and the gas inside the jet pipe 14 is ejected outward through the jet port, so that the jet pipe 14 and the jet port cooperate with each other to blow the dust at the bottom of the tunnel to the inlet of the dust suction pipe 31 .

[0064] The conveyor belt 33 and the converging plate 34 cooperate with each other to fan the dust at the top of the tunnel to the inlet of the dust suction pipe 31 for processing, and then cooperate with the jet pipe 14 to converge the dust at the bottom of the tunnel. The combination of the two can further uniformly converge the dust inside the tunnel.

[0065] Reference Figure 4 as well as Figure 7The airflow ejected from the arc tube 12 gradually slows down as the airflow rises in height, so the part of the airflow away from the arc tube 12 may not be able to form a continuous wind curtain. The suction pipe 35 provided by the present invention can absorb the airflow ejected from the arc tube 12 so that the part of the airflow away from the arc tube 12 forms a continuous wind curtain. Specifically, a suction pipe 35 matched with the arc tube 12 is installed between the dust suction pipes 31, and a through groove 351 is opened on the side of the suction pipe 35 close to the arc tube 12.

[0066] The air suction pipe 35 is connected with the dust suction pipe 31. During operation, there is an air pressure difference between the inside and outside of the air suction pipe 35 when the dust suction pipe 31 processes the dust. Therefore, the air suction pipe 35 can also suck the external dust into the inside through the through groove 351. Since the gas discharged from the arc tube 12 is also discharged upward, the air suction pipe 35 can absorb the gas in the wind curtain while maintaining the continuity of the wind curtain, thereby avoiding the air flow speed slowing down away from the arc tube 12, causing the wind curtain to be unable to form a continuous barrier, thereby causing the possibility of dust overflowing from there, thereby further ensuring the possibility of dust overflowing from the wind curtain.

[0067] At the same time, the suction pipe 35 can also suck in and remove the dust brought out by the converging plate 34 at the top of the conveyor belt 33 to avoid the possibility of dust overflowing.

[0068] Replay Figure 1 as well as Figure 2 A shower head 121 is installed on the arc tube 12 and between adjacent through slots 13 , and an inclined baffle 352 is installed on the side of the suction tube 35 away from the converging mechanism 3 .

[0069] The spray heads 121 cooperate with each other to form a wind curtain with water mist, which can effectively absorb and process dust and further reduce the possibility of dust spillage. The water mist drives the dust into the interior of the suction pipe 35.

[0070] The baffle 352 can increase the suction area of ​​the suction pipe 35 to ensure that all dust near the suction pipe 35 can be sucked into the suction pipe 35 when the air curtain is sucked, thereby reducing the possibility of dust overflow.

[0071] Reference Figure 4 Arc-shaped heating plates 353 are evenly installed on the circumferential surface of the suction pipe 35 along its length direction.

[0072] The arc heating plate 353 is a plate-like structure composed of resistance wires. When the resistance wires are energized, the suction pipe 35 can be heated. During specific operation, the arc heating plate 353 is energized to heat the suction pipe 35, so that the moist dust sucked into the suction pipe 35 can be dried to prevent the moist dust from entering the dust exhaust pipe 2 and causing blockage of the dust exhaust pipe 2, thereby affecting the dust removal effect of the dust inside the tunnel, and part of the dried dust will remain in the suction pipe 35.

[0073] Reference Figure 7 In order to prevent dust from accumulating inside the suction pipe 35 and causing blockage of the suction pipe 35, the extraction rod 36 and the annular scraper 361 provided in the present invention cooperate with each other to clean the inner wall of the suction pipe 35. Specifically, the back sides of the dust suction pipe 31 are provided with connecting protrusions, and the suction pipe 35 is provided with an extraction rod 36 extending along its length direction and reciprocatingly moving, and both ends of the extraction rod 36 pass through the dust suction pipe 31 on the corresponding side and are slidably arranged on the connecting protrusions on the corresponding side, and a plurality of annular scrapers 361 are evenly arranged on the extraction rod 36 along its length direction through supporting protrusions.

[0074] During specific operation, the pulling rod 36 reciprocates along the length direction of the suction pipe 35. During the reciprocating movement of the pulling rod 36, the annular scraper 361 is driven to reciprocate synchronously through the supporting protrusion. During the reciprocating movement of the annular scraper 361, the dust adhered to the inner wall of the suction pipe 35 can be scraped off. Due to the pressure difference between the inside and outside of the dust suction pipe 31, the scraped dust enters the interior of the dust suction pipe 31 through the suction pipe 35, thereby avoiding the possibility of dust accumulation inside the suction pipe 35.

[0075] Reference Figures 5 to 7 In order to reduce the use of drive, the swing rod 365 and the linkage rod 363 provided by the present invention cooperate with each other to drive the insertion and extraction rod 36 to move back and forth. Specifically, a fixed protrusion 362 is installed on any dust suction pipe 31, and a linkage rod 363 is slidably arranged on the fixed protrusion 362. A reset spring 364 for resetting the linkage rod 363 is sleeved on the linkage rod 363, and the reset spring 364 is installed on the fixed protrusion 362. The driving shaft 312 closest to the suction pipe 35 and close to the fixed protrusion 362 passes through the back side of the corresponding rectangular cavity 311.

[0076] A swing rod 365 is installed on the circumferential surface of the driving shaft 312 which passes through the corresponding rectangular cavity 311 on the back side, an adjusting block 366 is provided at the end of the linkage rod 363 close to the swing rod 365, a resistance block 367 is installed at the end of the linkage rod 363 away from the swing rod 365, an adjusting connecting block 368 which cooperates with the linkage rod 363 is installed at the end of the insertion rod 36 close to the linkage rod 363, a telescopic spring 369 is provided at the end of the insertion rod 36 close to the adjusting connecting block 368, and the two ends of the telescopic spring 369 are respectively connected with the adjusting connecting block 368 and the fixing protrusion 362.

[0077] The adjusting block 366 is provided with an inclined surface, and the adjusting connecting block 368 is also provided with an inclined surface. During specific operation, the driving shaft 312 corresponding to the swing rod 365 drives the swing rod 365 to rotate during the rotation process. During the rotation process of the swing rod 365, it fits with the inclined surface on the adjusting block 366 and drives the adjusting block 366 to move toward the side of the insertion rod 36 through the inclined surface. During the movement of the adjusting block 366, it drives the linkage rod 363 to move synchronously. At this time, the reset spring 364 is stretched. During the movement of the linkage rod 363, the contact block 367 is driven to move and abut against the inclined surface on the adjusting connecting block 368, and then the contact block 367 and the inclined surfaces on the adjusting connecting block 368 cooperate with each other to drive the insertion rod 36 to move toward the adjusting connecting block 368, and the telescopic spring 369 is stretched.

[0078] When the swing rod 365 passes over the inclined surface of the adjusting block 366, the reset spring 364 drives the linkage rod 363 to reset. At this time, the resistance block 367 disengages from the inclined surface on the adjusting link block 368, and the telescopic spring 369 resets and drives the insertion rod 36 to reset. When the swing rod 365 contacts the inclined surface on the adjusting block 366 again, the above steps are repeated to drive the annular scraper 361 to scrape off the dust attached to the inner wall of the suction pipe 35 through the insertion rod 36, thereby reducing the use of the existing drive.

[0079] Example 2: Reference Figure 8 On the basis of the first embodiment, in order to further raise the dust inside the tunnel, the exhaust pipe 113 provided by the present invention can discharge irregular airflow into the tunnel, and a rectangular block 111 is provided at the end of the circumferential surface of the blower pipe 11, and connecting frames 112 are symmetrically installed on the rectangular block 111 along the length direction of the suction pipe 35, and the exhaust pipe 113 is installed between the connecting frames 112 corresponding to the same rectangular block 111 through a spring hinge.

[0080] During specific operation, before the dust removal work begins, the exhaust pipe 113 is connected to the blast pipe 11 on the corresponding side through a flexible pipe (not shown in the figure), and the length of the flexible pipe is long enough. The airflow from the blast pipe 11 enters the exhaust pipe 113 through the flexible pipe. At this time, by changing the way the air pump pumps the airflow, the airflow enters the blast pipe 11 in an intermittent pumping manner. When the air pump pumps air, the gas enters the exhaust pipe 113 through the blast pipe 11 and the flexible pipe. Due to the large driving force of the gas, the exhaust pipe 113 rotates around the spring hinge at a certain angle. When the air pump does not pump air, the exhaust pipe 113 does not pass air. The exhaust pipe 113 is reset by the spring hinge at this time, and then in the process of alternating air pumping inside the exhaust pipe 113, the exhaust pipe 113 always swings around the spring hinge, and then the airflow discharged from the exhaust pipe 113 to the inside of the tunnel moves irregularly, so that the irregular airflow can blow the dust inside the tunnel and attached to the equipment, further improving the dust lifting effect.

[0081] Finally, refer to Fig. 9 The present invention also provides a method for dust removal by long-pressure and short-extraction air separation at a mine excavation face, and the method of use thereof comprises the following steps: S1: preparation for dust removal, connecting the linkage frame 15 with the existing excavation head, and in the process of the excavation head advancing into the tunnel, synchronously driving the blast pipe 11 and the dust suction pipe 31 to move through the linkage frame 15. At this time, air flow is blown into the air inlet pipe 1 through the existing air pump, and air flow is blown into the air blast pipe 11 through the air inlet pipe 1. After entering the tunnel, the air flow can lift up the dust generated during the excavation process, so that the dust gathers at the inlet of the dust suction pipe 31.

[0082] S2: Dust prevention treatment: the airflow inside the air inlet pipe 1 enters the blast pipe 11, and the airflow inside the blast pipe 11 is discharged to the inside of the tunnel through the through groove 13. The airflow forms a wind curtain inside the tunnel to passively block the raised dust.

[0083] S3: Dust is gathered. The rotating roller 32 is driven to rotate by an external driving force (motor, etc.). The rotating roller 32 drives the conveyor belt 33 to transmit during the rotation. Then the conveyor belt 33 drives the gathering plate 34 to move along the transmission direction of the conveyor belt 33. During the movement of the gathering plate 34, the raised dust can be fanned and gathered toward the inlet of the dust suction pipe 31.

[0084] S4: Dust is collected and gas is pumped out through the dust exhaust pipe 2, so that a pressure difference occurs inside and outside the dust exhaust pipe 2. The raised dust can be pressed into the dust exhaust pipe 2 through the dust suction pipe 31, so that the dust inside the tunnel is discharged outward.

[0085] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0086] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A long-pressure short-draw air dust removal device for a mine excavation face, comprising two symmetrically arranged air inlet pipes (1) and dust exhaust pipes (2) corresponding to the air inlet pipes (1), characterized in that: The dust exhaust pipe (2) is jointly installed with a convergence mechanism (3), wherein: Converging institutions (3) include: Dust suction pipes (31) are provided in two pieces and correspond one to one with the dust exhaust pipes (2), and are connected to the corresponding dust exhaust pipes (2); Two rotating rollers (32) are provided and are symmetrically arranged along the length direction of the dust suction pipe (31) and are arranged between the two dust suction pipes (31); A conveyor belt (33) is installed between two rotating rollers (32), and a plurality of convergence plates (34) are evenly arranged on the conveyor belt (33) along its transmission direction; The air inlet pipe (1) is connected to the blast pipe (11), the two blast pipes (11) are commonly installed with an arc-shaped pipe (12) which is connected to the two blast pipes, the arc-shaped pipe (12) is evenly provided with a plurality of through grooves (13) along its circumference, an air jet pipe (14) is also arranged between the two blast pipes (11), and a linkage frame (15) is commonly installed between the blast pipe (11) and the dust suction pipe (31) on the corresponding side; A rectangular cavity (311) is further provided between the dust suction pipe (31) and the dust discharge pipe (2); a driving shaft (312) corresponding to the rotating roller (32) is rotatably installed on the opposite surface of the rectangular cavity (311) through a bearing, and one end of the driving shaft (312) away from the corresponding rectangular cavity (311) is connected to the corresponding rotating roller (32); and a plurality of blades (313) are evenly arranged along the circumference of the driving shaft (312) located inside the corresponding rectangular cavity (311); The dust suction pipe (31) is provided with a connecting protrusion on the back side thereof, and a pulling rod (36) extending along the length direction thereof and reciprocatingly moving is provided inside the air suction pipe (35), and both ends of the pulling rod (36) penetrate the dust suction pipe (31) on the corresponding side and penetrate and slide on the connecting protrusion on the corresponding side, and a plurality of annular scrapers (361) are evenly provided on the pulling rod (36) along the length direction thereof through the supporting protrusion; A fixed protrusion (362) is installed on any dust suction pipe (31), a linkage rod (363) is slidably provided on the fixed protrusion (362), a reset spring (364) for resetting the linkage rod (363) is sleeved on the linkage rod (363), and the reset spring (364) is installed on the fixed protrusion (362), the driving shaft (312) closest to the air suction pipe (35) and close to the fixed protrusion (362) passes through the side of the corresponding rectangular cavity (311) away from the rotating roller (32), and a swing rod (365) is installed on the circumferential surface of the driving shaft (312) passing through the side of the corresponding rectangular cavity (311) away from the rotating roller (32); An adjusting block (366) is arranged at one end of the linkage rod (363) close to the swing rod (365), a resisting block (367) is installed at one end of the linkage rod (363) away from the swing rod (365), an adjusting connecting block (368) matched with the linkage rod (363) is installed at one end of the insertion rod (36) close to the linkage rod (363), a telescopic spring (369) is arranged at one end of the insertion rod (36) close to the adjusting connecting block (368), and two ends of the telescopic spring (369) are respectively connected to the adjusting connecting block (368) and the fixing protrusion (362).

2. A mine excavation face long pressure short extraction air dust removal device according to claim 1, characterized in that: The converging plate (34) is composed of a plurality of slidingly plugged rectangular plates (341), and a yielding arc plate (342) is provided at one end of the rectangular plate (341) away from the conveyor belt (33).

3. The long-pressure short-draw air dust removal device for a mine excavation face according to claim 1 is characterized in that: The jet pipes (14) are provided in plurality and are evenly arranged along the length direction of the blast pipe (11), and both ends of the jet pipe (14) are respectively installed through the blast pipe (11) on the corresponding side, and the jet pipe (14) is evenly provided with a plurality of jet ports along its length direction.

4. The long-pressure short-draw air dust removal device for a mine excavation face according to claim 1 is characterized in that: An air suction pipe (35) matching with the arc-shaped pipe (12) is installed between the dust suction pipes (31), and a through groove (351) is provided on one side of the air suction pipe (35) close to the arc-shaped pipe (12).

5. The long-pressure short-draw air dust removal device for a mine excavation face according to claim 1 is characterized in that: The portion of the arc-shaped tube (12) located between adjacent through grooves (13) is provided with a spray head (121), and the side of the air suction tube (35) away from the converging mechanism (3) is provided with an inclined baffle (352).

6. The long-pressure short-draw air dust removal device for a mine excavation face according to claim 1 is characterized in that: Arc-shaped heating plates (353) are evenly installed on the circumferential surface of the air suction pipe (35) along its length direction.

7. A mine excavation face long pressure short extraction wind dust removal method, comprising a mine excavation face long pressure short extraction wind dust removal device as claimed in any one of claims 1 to 6, characterized in that: The method of use includes the following steps: S1: Dust removal preparation, connecting the linkage frame (15) to the existing tunneling head; S2: dust prevention treatment, pumping gas into the air inlet pipe (1), the gas enters the arc pipe (12) and the blast pipe (11) respectively, and the gas inside the arc pipe (12) enters the tunnel through the through groove (13) to form a wind curtain; S3: Dust gathering, the dust is gathered by the cooperation between the conveyor belt (33) and the gathering plate (34); S4: Dust collection: the gathered and blown dust is collected through the dust suction pipe (31).

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