Tunnel jumbo for excavating water curtain dust removal device

Abstract

The present application relates to the technical field of water curtain dust removal, and discloses a tunnel boom roadheader excavation water curtain dust removal device, which comprises a dust removal component and a recovery component, the recovery component is used for recycling water flow generated during operation of the dust removal component, and the side surface of the recovery component is connected with the dust removal component; the dust removal component comprises two water tanks, the two sides of each water tank are connected with track components, a connecting port is arranged on one side of each water tank, a water pump is connected to the inner side of each water tank, water pipes are connected to the top of each water tank, the bottom of each water pipe is connected with the output end of the water pump, dust fall pipes are connected to the top of each water pipe, and a plurality of spray heads are uniformly connected to the side surface of each dust fall pipe. Through the arrangement of the recovery component, during the water curtain dust fall process, part of the water mist that completes dust fall is collected into the recovery grooves of the two recovery frames, the water flow in the recovery grooves is introduced into the filtering mechanism, and after filtering treatment, the water flow is transported to the dust fall pipes through the recovery pipes to realize recycling, thereby avoiding waste of water resources.

Description

Technical Field

[0001] This invention relates to the field of water curtain dust removal technology, specifically a water curtain dust removal device for tunnel boring machines. Background Technology

[0002] A tunnel boring machine (TBM) is a comprehensive mechanized tunnel excavation equipment integrating cutting, loading, traveling, and support. It is mainly used for excavation operations in medium-soft rock, soil-rock composite strata, or fractured surrounding rock tunnels, and is particularly suitable for tunnel projects with variable cross-sections and complex geological conditions. Its core feature is the use of a flexibly adjustable "cantilever cutting head" to break the rock mass, achieving non-blasting excavation with minimal disturbance to the surrounding rock and high safety. During tunnel construction, the friction between the cutting head and the rock at the tunnel face generates a large amount of dust, making the construction environment harsh. Dust not only affects the health of workers but also interferes with the driver's vision, reduces excavation efficiency, and increases construction risks and difficulties. Currently, common dust control methods in tunnels include fan dust suppression, mist cannon dust suppression, and manual handheld water spraying.

[0003] The core principle of water curtain dust suppression devices is to capture dust using inertial collision, interception, and diffusion. When a tunnel boring machine is excavating, dust diffuses with the airflow. The water curtain dust suppression device sprays pressurized water at high speed in fan or cone shapes through nozzles at specific locations, forming a fine water curtain with a certain thickness and area, thus intercepting the dust. However, the water curtain dust suppression process consumes a large amount of water, resulting in water resource waste. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a water curtain dust removal device for tunnel boring machines, which is achieved through the following technical solution:

[0005] A water curtain dust removal device for tunnel boring machines includes:

[0006] A dust removal component, which is used for dust removal during excavation by a cantilever tunneling machine;

[0007] A recycling component is used to recycle the water produced by the dust removal component during operation, and the side of the recycling component is fixedly connected to the dust removal component.

[0008] The dust removal component includes two water tanks, with track components fixedly connected to both sides of each water tank. A connection port is provided on one side of each water tank, and a water pump is fixedly connected to the inside of each water tank. Water pipes are fixedly connected to both sides of the top of each water tank, and the bottom of each water pipe is fixedly connected to the output end of the water pump. A dust suppression pipe is fixedly connected to the top of each water pipe, and several spray heads are evenly arranged on the side of the dust suppression pipe. The spray heads are fixedly connected to the inside of the dust suppression pipe.

[0009] Preferably, the recycling component includes two filtration mechanisms, each with a recycling pipe fixedly connected to its side. One end of each recycling pipe is fixedly connected to a dust settling pipe. Both sides of each filtration mechanism are fixedly connected to a recycling rack, and the top of each recycling rack has a recycling trough.

[0010] Preferably, a one-way water inlet valve is installed on the recovery pipe near the dust settling pipe.

[0011] Preferably, the filtration mechanism includes a filter housing, the inner side of which is fixedly connected to the end of the recovery pipe away from the dust settling pipe, rotating components are fixedly connected to both sides of the filter housing, a round tube is fixedly connected to the side of the rotating component away from the filter housing, and anti-clogging components are fixedly connected to both sides of the inner cavity of the filter housing.

[0012] Preferably, the anti-clogging component includes a fixing frame and a mesh plate. The side of the fixing frame is fixedly connected to the inner side of the filter housing. A round rod is fixedly connected to one side of the fixing frame. A cleaning brush is fixedly connected to the end of the round rod away from the fixing frame. A limit kit is slidably connected to the side of the fixing frame away from the round rod. The side of the limit kit is fixedly connected to the mesh plate.

[0013] Preferably, the limiting kit includes a limiting frame, a limiting shaft is fixedly connected to the side of the limiting frame near the fixed frame, the end of the limiting shaft away from the limiting frame is slidably connected to the inner side of the fixed frame, limiting rods are fixedly connected to both sides of the included angle of the limiting frame near the fixed frame, a clearance groove is provided on the side of the limiting rod away from the limiting frame, a connecting spring is sleeved on the limiting shaft, a rotating block is rotatably connected to the middle of the fixed frame away from the limiting shaft, connecting rods are fixedly connected to both sides of the rotating block, and counterweights are fixedly connected to the ends of the two connecting rods away from the rotating block, and the counterweights are fixedly connected to the mesh plate.

[0014] Preferably, one end of the connecting spring is fixedly connected to the fixed frame, the other end of the connecting spring is fixedly connected to the side of the limiting frame near the fixed frame, the side of the limiting rod abuts against the connecting rod, and the inner side of the rotating block is rotatably connected to the side of the round rod.

[0015] Preferably, the rotating assembly includes a circular plate frame and two fixed rods. One end of each of the two fixed rods is fixedly connected to both sides of the mesh plate, and the other end of each fixed rod is fixedly connected to a baffle. The sides of the two circular plate frames are fixedly connected to both ends of the filter housing. A sliding groove is provided in the middle of the circular plate frame, and a material discharge groove is provided in the middle of the side of the circular plate frame.

[0016] Preferably, the side of the mesh plate is rotatably connected to the inner side of the circular plate frame, the side of the fixed rod is slidably connected to the inner side of the sliding groove, the side of the baffle is slidably connected to both sides of the inner cavity of the circular plate frame, and the side of the circular plate frame away from the filter housing is fixedly connected to the end of the circular tube away from the recycling rack.

[0017] The water curtain dust removal device for tunnel boring machines provided by this invention has the following beneficial effects:

[0018] 1. The tunnel cantilever excavator's water curtain dust suppression device, by setting up a recycling component, allows some of the water mist that has completed dust suppression to flow into the recycling tanks of two recycling racks during the water curtain dust suppression process. The water in the recycling tanks is introduced into the filtration mechanism, and after filtration, it is transported to the dust suppression pipe through the recycling pipe for recycling, thus avoiding the waste of water resources.

[0019] 2. The tunnel cantilever excavator's water curtain dust removal device, by setting up anti-clogging components, automatically triggers the switching of the upper and lower parts of the screen plate when the water level rises, avoiding filtration failure caused by blockage in a single area, extending the continuous filtration time, and using a cleaning brush to clear blockages in the screen plate during rotation, reducing the frequency of manual disassembly and cleaning.

[0020] 3. The water curtain dust removal device for tunnel boring machines can be set with limit kits. The pressure change caused by the obstruction of water flow can trigger the flipping action to achieve "blockage switching". This ensures that the filtration process is not interrupted. By having the upper and lower parts of the screen work alternately, it avoids long-term pressure blockage in a single area, reduces local wear of the screen, and extends its service life.

[0021] 4. The tunnel cantilever excavator's water curtain dust removal device uses a rotating component to synchronously drive the baffle with the power of the screen plate's rotation. It requires no additional power source and achieves efficient "one-turn cleaning" coordination, simplifying the structure while improving cleaning efficiency and reducing the continuous erosion of the screen plate by impurities. Attached Figure Description

[0022] Figure 1 A schematic diagram of the water curtain dust removal device for tunnel cantilever boring machines provided by the present invention;

[0023] Figure 2 This is an axonometric view of the present invention;

[0024] Figure 3 This is a schematic diagram of the dust removal component in this invention;

[0025] Figure 4 This is a schematic diagram of the dust collection pipe in this invention;

[0026] Figure 5 This is a schematic diagram of the structure of the recycling component in this invention;

[0027] Figure 6 This is a schematic diagram of the recycling rack in this invention;

[0028] Figure 7 This is a schematic diagram of the filtration mechanism in this invention;

[0029] Figure 8 This is a schematic diagram of the anti-clogging component in the present invention;

[0030] Figure 9 This is a schematic diagram of the limiting kit in this invention;

[0031] Figure 10 This is a schematic diagram of the rotating component in this invention;

[0032] Figure 11 This is a partial structural diagram of the circular plate frame in this invention.

[0033] In the diagram: 1. Dust removal component; 11. Water tank; 12. Connection port; 13. Water pump; 14. Water pipe; 15. Dust settling pipe; 16. Spray head; 2. Track component; 4. Recycling component; 41. Filtration mechanism; 411. Filter housing; 412. Rotating assembly; 4121. Circular plate frame; 4122. Fixing rod; 4123. Baffle; 4124. Sliding groove; 4125. Material discharge chute; 413. Anti-clogging component; 4131. Fixed frame; 4132, round rod; 4133, cleaning brush; 4134, mesh plate; 4135, limiting kit; 41351, limiting frame; 41352, limiting shaft; 41353, rotating block; 41354, connecting rod; 41355, counterweight; 41356, limiting rod; 41357, clearance groove; 41358, connecting spring; 414, round tube; 42, recycling tube; 43, recycling rack; 44, recycling trough. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-2 This invention provides a water curtain dust removal device for tunnel boring machines, comprising:

[0036] Dust removal component 1 is used for dust removal during excavation by a cantilever tunneling machine. Track components 2 are fixedly connected to both sides of the dust removal component 1.

[0037] The recycling component 4 is used to recycle the water produced by the dust removal component 1 during operation. The side of the recycling component 4 is fixedly connected to the dust removal component 1.

[0038] Please see Figures 1-4 The dust removal component 1 includes two water tanks 11. Track components 2 are fixedly connected to both sides of the water tanks 11. A connection port 12 is opened on one side of the water tank 11. A water pump 13 is fixedly connected to the inside of the water tank 11. Water pipes 14 are fixedly connected to both sides of the top of the water tank 11. The bottom of the two water pipes 14 is fixedly connected to the output end of the water pump 13. A dust suppression pipe 15 is fixedly connected to the top of the two water pipes 14. Several spray heads 16 are evenly arranged on the side of the dust suppression pipe 15. The spray heads 16 are fixedly connected to the inside of the dust suppression pipe 15.

[0039] After the external water pipe is connected to the connection port 12 on the water tank 11, water is continuously injected into the water tank 11. After the water pump 13 is started, the water in the water tank 11 is driven by the water pump 13 and transported to the dust suppression pipe 15 through the water pipe 14. The water in the dust suppression pipe 15 is sprayed out from the spray head 16 under pressure, forming a continuous water mist. These water mists intertwine on the tunnel cross section to form a closed water curtain, effectively isolating the tunnel face from the construction area behind. When the dust generated by the cantilever tunneling machine spreads outward, it will collide and be adsorbed with the water mist particles in the water curtain. After the dust is wetted, its weight increases and it can no longer spread. Finally, it quickly settles to the ground under the action of gravity, achieving efficient dust removal.

[0040] Please see Figures 1-6 The recycling component 4 includes two filter mechanisms 41. A recycling pipe 42 is fixedly connected to the side of each filter mechanism 41. One end of the recycling pipe 42 is fixedly connected to the dust settling pipe 15. A one-way water inlet valve is installed on the recycling pipe 42 near the dust settling pipe 15. A recycling rack 43 is fixedly connected to both sides of each filter mechanism 41. A recycling trough 44 is opened on the top of the recycling rack 43.

[0041] During the water curtain dust suppression process, some of the water mist that has completed dust suppression will flow into the recycling tanks 44 of the two recycling racks 43. The water in the recycling tanks 44 is introduced into the filtration mechanism 41. After filtration, it is then transported to the dust suppression pipe 15 through the recycling pipe 42 for recycling. At the same time, the one-way water inlet valve can prevent the water in the dust suppression pipe 15 from flowing back into the recycling pipe 42, ensuring the stable one-way operation of the water circulation.

[0042] Please see Figures 1-7 The filter mechanism 41 includes a filter housing 411. The inner side of the filter housing 411 is fixedly connected to the end of the recovery pipe 42 away from the dust settling pipe 15. Rotating components 412 are fixedly connected to both sides of the filter housing 411. A round tube 414 is fixedly connected to the side of the rotating component 412 away from the filter housing 411. Anti-clogging components 413 are fixedly connected to both sides of the inner cavity of the filter housing 411.

[0043] Water flows continuously through the recycling tank 44 of the recycling rack 43 into the round pipe 414 and then into the filter housing 411. During this process, the anti-clogging component 413 simultaneously starts the filtration operation to avoid clogging during the filtration process and ensure smooth water flow. While the anti-clogging component 413 is performing the filtration operation, it can also drive the rotating component 412 to rotate to clean up the accumulated impurities.

[0044] Please see Figures 1-8 The anti-clogging component 413 includes a fixing frame 4131 and a mesh plate 4134. The side of the fixing frame 4131 is fixedly connected to the inside of the filter housing 411. A round rod 4132 is fixedly connected to one side of the fixing frame 4131. A cleaning brush 4133 is fixedly connected to the end of the round rod 4132 away from the fixing frame 4131. A limit kit 4135 is slidably connected to the side of the fixing frame 4131 away from the round rod 4132. The side of the limit kit 4135 is fixedly connected to the mesh plate 4134.

[0045] After dust suppression, the water flows continuously into the filter housing 411 through the circular pipe 414. The water is filtered by the mesh plate 4134 to intercept rock powder and impurities in the water, preventing them from entering the dust suppression pipe 15 with the water flow, thereby reducing the risk of clogging of the spray head 16 and ensuring the stable operation of the dust suppression work.

[0046] During normal filtration, since the diameter of the circular tube 414 is smaller than the diameter of the filter housing 411, the water flow mostly passes through the lower half of the mesh plate 4134, meaning that the lower half is mainly responsible for filtration. When the mesh plate 4134 becomes clogged due to long-term operation, the continuous inflow of water is obstructed, causing the water level on the side of the mesh plate 4134 closest to the circular tube 414 to rise. At this time, the water flow automatically switches to the upper half of the mesh plate 4134. As the water flow continues to impact the upper half, its impact force acts on the limiting device 4135, pushing the limiting device 4135 to move, thereby causing the mesh plate 4134 to rotate 180 degrees, realizing the interchange of the upper and lower parts of the mesh plate 4134. During the rotation of the mesh plate 4134, its side will contact and rub against the cleaning brush 4133 on the fixing frame 4131. The cleaning brush 4133 can simultaneously remove impurities from the clogged area of ​​the mesh plate 4134, ensuring that the mesh is clear.

[0047] Please see Figures 1-9The limiting assembly 4135 includes a limiting frame 41351. A limiting shaft 41352 is fixedly connected to the side of the limiting frame 41351 near the fixed frame 4131. The end of the limiting shaft 41352 away from the limiting frame 41351 is slidably connected to the inner side of the fixed frame 4131. Limiting rods 41356 are fixedly connected to both sides of the included angle of the side of the limiting frame 41351 near the fixed frame 4131. A clearance groove 41357 is provided on the side of the limiting rod 41356 away from the limiting frame 41351. A connecting spring 41358 is sleeved on the limiting shaft 41352. One end of the connecting spring 41358 is fixedly connected to the fixed frame 4131. Then, the other end of the connecting spring 41358 is fixedly connected to the side of the limiting frame 41351 near the fixed frame 4131. The middle part of the fixed frame 4131 away from the limiting shaft 41352 is rotatably connected to the rotating block 41353. Both sides of the rotating block 41353 are fixedly connected to the connecting rod 41354. The ends of the two connecting rods 41354 away from the rotating block 41353 are fixedly connected to the counterweight 41355. The counterweight 41355 is fixedly connected to the mesh plate 4134. The side of the limiting rod 41356 abuts against the connecting rod 41354. The inner side of the rotating block 41353 is rotatably connected to the side of the round rod 4132.

[0048] When the lower half of the mesh of the screen plate 4134 is blocked, the continuous flow of water into the filter housing 411 is obstructed, causing the water level on the side of the screen plate 4134 near the circular pipe 414 to rise. The impact force of the water flow increases accordingly. At this time, the water flow changes to pass through the upper half of the screen plate 4134, and its impact force acts on the arc surface of the limiting frame 41351, pushing the limiting frame 41351 to move through the limiting shaft 41352. This, in turn, drives the limiting rod 41356, which abuts against the connecting rod 41354, to move away from the connecting rod 413. The movement of 54 causes the limiting rod 41356 to release the limiting of the counterweight 41355. Since the counterweight 41355 is set at an angle, its gravitational potential energy is converted into power at the moment the limiting is released, which drives the screen plate 4134 to flip quickly, realizing the exchange of positions between the upper and lower parts of the screen plate 4134. The original upper part becomes the lower part, and the original blocked lower part becomes the upper part, ensuring that the water flow can continue to pass through the lower part of the screen plate 4134, i.e. the original upper part, for smooth filtration.

[0049] Once the new lower section is properly ventilated, the limit frame 41351 moves to its initial position via the limit shaft 41352 under the reset action of the connecting spring 41358. Simultaneously, the counterweight 41355 flips, causing the connecting rod 41354 to rotate. The rotated connecting rod 41354 contacts and slides into the clearance groove 41357 on the limit rod 41356, eventually entering between the two limit rods 41356, completing the limit reset and waiting for the next blockage trigger.

[0050] Please see Figures 1-11The rotating assembly 412 includes a circular plate frame 4121 and two fixed rods 4122. The side of the circular plate frame 4121 away from the filter housing 411 is fixedly connected to the end of the circular tube 414 away from the recycling rack 43. The side of the mesh plate 4134 is rotatably connected to the inner side of the circular plate frame 4121. One end of each of the two fixed rods 4122 is fixedly connected to both sides of the mesh plate 4134. The other end of each fixed rod 4122 is fixedly connected to a baffle 4123. The side of the baffle 4123 is slidably connected to both sides of the inner cavity of the circular plate frame 4121. The sides of the two circular plate frames 4121 are fixedly connected to both ends of the filter housing 411. A sliding groove 4124 is provided in the middle of the circular plate frame 4121. A material discharge groove 4125 is provided in the middle of the side of the circular plate frame 4121. The side of each fixed rod 4122 is slidably connected to the inner side of the sliding groove 4124.

[0051] When the screen plate 4134 rotates with the counterweight 41355, the fixing rods 4122 on both sides of it will rotate synchronously along the sliding groove 4124, and at the same time drive the baffle 4123 to rotate in the inner cavity of the circular plate frame 4121. During this process, a temporary gap will be formed between the baffle 4123 and the discharge chute 4125. The impurities intercepted by the screen plate 4134 can fall and be discharged naturally through the gap. The impurities are discharged directly with the gap, avoiding a large accumulation around the screen plate 4134. This reduces the risk of blockage caused by impurities covering the screen plate 4134 from the source and ensures that the filtration channel is unobstructed.

[0052] Specific workflow:

[0053] After the cantilever tunneling machine arrives at the working face and is in place, it is ready to carry out tunnel excavation. The operator drives the track component 2 to move through the wireless remote control, which in turn drives the dust removal component 1 to move synchronously. After being adjusted to the appropriate position, the laser positioning device is used to accurately align with the core area 3-5 meters from the working face. Compared with the problem that traditional support rollers are prone to getting stuck in muddy or uneven tunnel floors, the track component 2 can move more stably in complex tunnel environments, ensuring the positioning efficiency of the dust removal component 1.

[0054] During excavation, the external water pipe is connected to the dust removal component 1. After being turned on, the water mist sprayed by the dust removal component 1 intertwines on the tunnel cross-section to form a closed water curtain, separating the tunnel face from the construction area behind. At the same time, during the dust removal process, the recovery component 4 simultaneously recovers some of the water mist after dust suppression. After treatment, it is recycled. As the tunnel face advances, the track component 2 drives the dust removal component 1 to move forward step by step, continuously compressing the dust activity range and ensuring that the water curtain always accurately covers the area near the tunnel face, maintaining a high-efficiency dust removal effect.

[0055] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A dust removal device for tunneling shield tunneling machine excavation water curtain, characterized in that, Include: Dust removal component (1) for dust removal when cantilever excavator excavates; Recycling component (4) for recycling water flow produced by dust removal component (1) during operation, side of recycling component (4) is fixedly connected with dust removal component (1); The dust removal component (1) comprises two water tanks (11), the two sides of the water tank (11) are fixedly connected with track components (2), one side of the water tank (11) is provided with a connecting port (12), the inner side of the water tank (11) is fixedly connected with a water pump (13), the top of the water tank (11) is fixedly connected with a water pipe (14), the bottom of the two water pipes (14) is fixedly connected with the output end of the water pump (13), the top of the two water pipes (14) is fixedly connected with a dust fall pipe (15), the side of the dust fall pipe (15) is uniformly provided with a plurality of spray heads (16), the spray head (16) is fixedly connected with the inner side of the dust fall pipe (15); The recycling component (4) comprises two filter mechanisms (41), the sides of the two filter mechanisms (41) are fixedly connected with recycling pipes (42), one end of the recycling pipe (42) is fixedly connected with the dust fall pipe (15), the two sides of the two filter mechanisms (41) are fixedly connected with recycling frames (43), the top of the recycling frame (43) is provided with a recycling groove (44); The filter mechanism (41) comprises a filter shell (411), the inner side of the filter shell (411) is fixedly connected with one end of the recycling pipe (42) away from the dust fall pipe (15), the two sides of the filter shell (411) are fixedly connected with rotating assemblies (412), one side of the rotating assembly (412) away from the filter shell (411) is fixedly connected with a circular pipe (414), the two sides of the inner cavity of the filter shell (411) are fixedly connected with anti-blocking assemblies (413); The anti-blocking assembly (413) comprises a fixed frame (4131) and a mesh plate (4134), the side of the fixed frame (4131) is fixedly connected with the inner side of the filter shell (411), one side of the fixed frame (4131) is fixedly connected with a circular rod (4132), one end of the circular rod (4132) away from the fixed frame (4131) is fixedly connected with a cleaning brush (4133), one side of the fixed frame (4131) away from the circular rod (4132) is slidingly connected with a limiting sleeve (4135), the side of the limiting sleeve (4135) is fixedly connected with the mesh plate (4134); The limiting set (4135) includes a limiting frame (41351) fixedly connected with a limiting shaft (41352) on one side close to the fixed frame (4131), one end of the limiting shaft (41352) away from the limiting frame (41351) is in sliding connection with the inner side of the fixed frame (4131), both sides of the included angle of the limiting frame (41351) close to one side of the fixed frame (4131) are fixedly connected with limiting rods (41356), the side away from the limiting frame (41351) of the limiting rod (41356) is provided with a gap slot (41357), the limiting shaft (41352) is provided with a connecting spring (41358), the middle of the fixed frame (4131) is rotatably connected with a rotating block (41353) away from the limiting shaft (41352), both sides of the rotating block (41353) are fixedly connected with connecting rods (41354), one end of the connecting rod (41354) away from the rotating block (41353) is fixedly connected with a counterweight block (41355), and the counterweight block (41355) is fixedly connected with the mesh plate (4134). One end of the connecting spring (41358) is fixedly connected with the fixed frame (4131), the other end of the connecting spring (41358) is fixedly connected with one side of the limiting frame (41351) close to the fixed frame (4131), the side of the limiting rod (41356) is in abutment with the connecting rod (41354), and the inner side of the rotating block (41353) is rotatably connected with the side of the round rod (4132). The rotating assembly (412) includes a circular plate frame (4121) and two fixed rods (4122), one end of the fixed rod (4122) is fixedly connected with both sides of the mesh plate (4134), the other end of the fixed rod (4122) is fixedly connected with a baffle (4123), the side of the circular plate frame (4121) is fixedly connected with both ends of the filtering shell (411), the middle of the circular plate frame (4121) is provided with a sliding groove (4124), and the middle of the side of the circular plate frame (4121) is provided with a blanking slot (4125). The side of the mesh plate (4134) is rotatably connected with the inner side of the circular plate frame (4121), the side of the fixed rod (4122) is in sliding connection with the inner side of the sliding groove (4124), the side of the baffle (4123) is in sliding connection with both sides of the inner cavity of the circular plate frame (4121), and the side away from the filtering shell (411) of the circular plate frame (4121) is fixedly connected with one end away from the recovery frame (43) of the circular pipe (414).

2. The tunnel jumbo excavation water curtain dusting device according to claim 1, characterized in that: The one-way water inlet valve is installed at the position close to the dust falling pipe (15) of the recovery pipe (42).

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