A local dust removal device for a tunnel

Abstract

The application belongs to the technical field of tunnel dust removal, and particularly relates to a local dust removal equipment for a tunnel, which comprises a moving trolley, a dust sensor, a fan, a dust removal device, a fixing device and a connecting device arranged on the moving trolley. The local dust removal equipment for the tunnel can automatically remove dust in the tunnel through the dust removal device. The air sucked by the fan enters the arc-shaped conveying pipe, replaces the air in the tunnel, blows the dust out of the tunnel, and the moving trolley can drive the arc-shaped conveying pipe into the tunnel, so that personnel do not need to enter the tunnel, the physical harm of dust to the personnel is reduced, and the multiple arc-shaped conveying pipes can be folded and stored to reduce the occupied area. The technical problem of the existing tunnel construction producing a large amount of dust, the long disposal process of the existing dust removal device, the influence on the overall construction progress of the tunnel, the harm to the health of personnel and the increased workload is solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel dust removal technology, and in particular to a local dust removal device for tunnels. Background Technology

[0002] During railway tunnel construction, excessive dust is generated during the excavation process. The highest dust concentration often occurs after blasting at the tunnel face, which seriously affects the health of construction workers inside the tunnel and can also cause frequent equipment failures. Therefore, tunnel dust control is very important.

[0003] Currently, the conventional method for dealing with tunnel dust concentration is to use fans placed on the left or right side of the tunnel to extract dusty air from inside the tunnel to reduce dust concentration. However, this process is lengthy, the effect is not obvious, and it affects the next stage of tunnel excavation, ultimately affecting the overall construction progress of the tunnel. It is also impossible to quickly reduce dust deep inside the tunnel, requiring personnel to enter the tunnel. The large amount of dust affects the health of the personnel entering the tunnel. At the same time, the installation and dismantling of dust removal devices is cumbersome, requiring workers to install them at intervals along the tunnel depth, which increases the workload. Summary of the Invention

[0004] Given the large amount of dust generated during existing tunnel construction, the lengthy processing time of existing dust removal devices, which affects the overall construction progress of the tunnel, the need for personnel to enter the tunnel to move the dust removal devices, which endangers personnel health, and the cumbersome installation and disassembly process that increases the workload, this invention proposes a local dust removal device for tunnels.

[0005] The present invention proposes a local dust removal device for tunnels, including a mobile trolley, and also including a dust sensor, a fan, a dust removal device, a fixing device and a communication device installed on the mobile trolley;

[0006] The dust sensor is fixedly installed on the upper surface of the mobile cart, and the fan is located on one side of the mobile cart;

[0007] A dust removal device, comprising an arc-shaped conveying pipe for transmitting air and a scissor frame component, the dust removal device being located above the mobile trolley, the scissor frame component connecting multiple arc-shaped conveying pipes for unfolding and retracting operations;

[0008] The fixing device includes a movable locking block for fixing the arc-shaped conveying pipe and an adjusting screw. The fixing device is located above the moving trolley. The adjusting screw adjusts the two opposing movable locking blocks to move horizontally relative to each other or in opposite directions.

[0009] The connecting device is located on the outer surface of the dust removal device. The connecting device includes a conveying mechanism and a connecting mechanism. The conveying mechanism connects the multiple arc-shaped conveying pipes and conveys the air drawn by the fan. The connecting mechanism releases the seal on one end of the arc-shaped conveying pipe after the multiple arc-shaped conveying pipes are unfolded.

[0010] Preferably, a support frame is fixedly installed on the upper surface of the mobile trolley, and wire rollers are fixedly installed at both ends of the support frame via bearings. A conveying pipe is fixedly installed at the air outlet end of the fan. After the conveying pipe is wound around the outer surface of the wire roller, the other end is fixedly connected to an arc-shaped conveying pipe. A drive motor is fixedly installed at one end of the wire roller, and the outer surface of the drive motor is fixedly installed with the outer surface of the support frame.

[0011] Through the above technical solution, the rotation of the roller is driven by the drive motor. When the roller moves inside the tunnel, the conveying pipe on the roller is controlled to release the conveying pipe at a uniform speed in coordination with the moving speed of the moving trolley. This facilitates the moving trolley to move into the tunnel. At the same time, the fan can deliver the extracted air into the arc-shaped conveying pipe.

[0012] Preferably, the plurality of the arc-shaped conveying pipes are arranged in a rectangular array, the outer surface of the arc-shaped conveying pipes is arc-shaped, the hinge of the scissor frame component is fixedly installed to the outer surface of the arc-shaped conveying pipes, a support pipe is fixedly installed on the upper surface of the arc-shaped conveying pipes, a roller is slidably inserted into the inner wall of the support pipe, a shock-absorbing spring is fixedly installed on the lower surface of the roller, and the other end of the shock-absorbing spring is fixedly installed to the inner wall of the support pipe.

[0013] Through the above technical solution, the moving trolleys on the front and rear sides drive the arc-shaped conveying pipes on the front and rear sides to move. The scissor frame component can expand and contract multiple arc-shaped conveying pipes by pushing the movement of the arc-shaped conveying pipes.

[0014] Preferably, the outer surface of the arc-shaped conveying pipe is fixedly connected to an elastic air outlet pipe, and a plurality of the elastic air outlet pipes are distributed at equal distances along the outer surface of the arc-shaped conveying pipe. The outer surface of the elastic air outlet pipe is fixedly connected to an air outlet nozzle distributed in a rectangular array.

[0015] The above technical solution involves an elastic air outlet duct made of silicone or rubber material, which is elastic and can expand and support itself after the air is drawn in by the fan. When there is no wind, it contracts and hangs down due to the gravity of the air outlet nozzle. This helps to reduce the gap between multiple arc-shaped conveying pipes and reduce the space occupied by the dust removal equipment. The amount of air drawn in by the fan is greater than the amount of air sprayed out by the air outlet nozzle, which facilitates the expansion and support of the elastic air outlet duct.

[0016] Preferably, the fixing device further includes a positioning sleeve, the lower surface of which is fixedly installed on the upper surface of the moving trolley, and both sides of the positioning sleeve are slidably inserted into the moving blocks through through holes. The inner wall of one moving block is rotatably connected to the outer surface of the adjusting screw, and the inner wall of the other moving block is threadedly connected to one end of the adjusting screw. Both ends of the two arc-shaped conveying pipes are fixedly installed with fixing rods, and the outer surface of the fixing rods is slidably inserted into one end of the moving blocks through grooves.

[0017] The above technical solution allows the two moving blocks to move relative to or in opposite directions as the adjusting screw rotates, quickly fixing the fixing rod to the inner wall of the positioning sleeve, thus enabling rapid installation and disassembly.

[0018] Preferably, a spring retaining plate is fixedly installed on the inner wall of the positioning sleeve, one end of the fixing rod passes through the center of the spring retaining plate, and a retaining ring is fixedly installed on the upper surface of the movable locking block, with the outer surface of the retaining ring slidably connected to the outer surface of the spring retaining plate.

[0019] Through the above technical solution, the retaining ring can cause the retaining plate on the spring retaining plate to retract relative to the moving retaining block, thereby fixing the fixing rod again. This achieves double fixing of the fixing rod and increases its stability. The spring retaining plate is made of spring steel, which is elastic and can automatically reset, making it easy to disassemble the fixing rod.

[0020] Preferably, the conveying mechanism includes a spring conveying tube, one end of which is fixedly connected to the outer surface of the arc-shaped conveying tube, and a tension spring is fixedly installed inside the spring conveying tube.

[0021] Through the above technical solution, two adjacent arc-shaped conveying pipes can be connected by a spring conveying pipe. The arc-shaped conveying pipes are connected in a serpentine loop through the spring conveying pipe. By stretching the spring, the arc-shaped conveying pipes can be reset, and the arc-shaped conveying pipes can remain in a contracted state without being affected by external forces.

[0022] Preferably, a counterweight box is fixedly installed at the other end of two adjacent spring conveying tubes, and one end of the spring conveying tube extends through the inner wall of the counterweight box into its interior.

[0023] The above technical solution facilitates the reset of the spring conveying tube after stretching by using a counterweight box, keeping the spring conveying tube facing downwards, which is convenient for storing the arc-shaped conveying tube and reducing the area occupied. At the same time, the counterweight box can connect the two spring conveying tubes, allowing the air drawn by the fan to enter the other spring conveying tube through one spring conveying tube.

[0024] Preferably, the communication mechanism includes a venting base, the outer surface of which is fixedly installed to the inner wall of the arc-shaped conveying pipe, a limiting groove fixedly installed on the upper surface of the venting base, a ball bearing arranged in a rectangular array rotatably connected to the inner wall of the limiting groove, a sealing partition slidably inserted into the inner wall of the limiting groove, the outer surface of the sealing partition slidably connected to the outer surface of the ball bearing, and tension springs fixedly installed on both sides of the outer surface of the sealing partition, the other end of which is fixedly connected to the inner wall of the arc-shaped conveying pipe.

[0025] The above technical solution seals the through holes on the vent base by moving the sealing partition, preventing air from entering the arc-shaped conveying pipe. The ball bearings facilitate the movement of the sealing partition, and the tension springs facilitate the reset of the sealing partition.

[0026] Preferably, a magnet is fixedly installed on the outer surface of the arc-shaped conveying pipe, and the magnet is magnetically connected to the sealing partition.

[0027] With the above technical solution, when the arc-shaped conveying pipe is stored, the magnet approaches the sealing arc plate and generates an attractive force on the sealing arc plate, which then pulls the sealing arc plate to move. After the arc-shaped conveying pipe is unfolded, the magnetic force weakens and the sealing arc plate can be reset. Multiple arc-shaped conveying pipes are connected, and the connecting mechanism and the conveying mechanism are located on the same arc-shaped conveying pipe, which makes it easy to cut off the serpentine conveying loop of the arc-shaped conveying pipe.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. By installing a dust removal device, the tunnel interior can be automatically dusted. Air drawn in by a fan enters the arc-shaped conveying pipe, replacing the air inside the tunnel and blowing the dust out. A water spray device can be used to suppress the dust. A mobile trolley can move the arc-shaped conveying pipe into the tunnel interior, eliminating the need for personnel to enter the tunnel and reducing the health hazards of dust to workers. At the same time, multiple arc-shaped conveying pipes can be folded and stored to reduce the occupied area. This solves the technical problems of existing tunnel construction generating a large amount of dust, the lengthy handling process of existing dust removal devices affecting the overall construction progress of the tunnel, the need for personnel to enter the tunnel to move the dust removal device, the health hazards to personnel, and the cumbersome installation and disassembly, which increases the workload.

[0030] 2. By setting up a fixing device, the arc-shaped conveying pipe can be quickly installed and disassembled. The fixing rod under the arc-shaped conveying pipe is doubly fixed by the moving clamp and spring plate to prevent the arc-shaped conveying pipe from shaking during movement. This allows the arc-shaped conveying pipe to move stably with the moving trolley. This solves the technical problems of existing tunnel construction generating a lot of dust, the long treatment process of existing dust removal devices, the insignificant effect, which affects the overall construction progress of the tunnel, the need for personnel to enter the tunnel to move the dust removal device, which endangers the health of personnel, and the cumbersome installation and disassembly, which increases the workload.

[0031] 3. By setting up a connecting device, the arc-shaped conveying pipes can be connected to each other, facilitating the entry of sucked air. The spring conveying pipe reduces the area occupied during storage without affecting the deployment and distribution of the arc-shaped conveying pipes. The spring conveying pipe connects the arc-shaped conveying pipes in a serpentine loop, ensuring that each arc-shaped conveying pipe is fully filled before entering the next arc-shaped conveying pipe. This facilitates dust removal work in the tunnel, speeds up the dust removal process, and solves the technical problems of existing tunnel construction generating large amounts of dust, the long processing time of existing dust removal devices, the insignificant effect, and the impact on the overall construction progress of the tunnel. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a local dust removal device for tunnels proposed in this invention;

[0033] Figure 2 This is a perspective view of the arc-shaped conveying pipe structure of a local dust removal device for tunnels proposed in this invention;

[0034] Figure 3 This is a perspective view of the elastic conveying pipe structure of a local dust removal device for tunnels proposed in this invention;

[0035] Figure 4 This is a perspective view of the positioning sleeve structure of a local dust removal device for tunnels proposed in this invention;

[0036] Figure 5 This is a perspective view of the movable card block structure of a local dust removal device for tunnels proposed in this invention;

[0037] Figure 6 This is a perspective view of the adjusting screw structure of a local dust removal device for tunnels proposed in this invention;

[0038] Figure 7 This is a perspective view of the spring conveying pipe structure of a local dust removal device for tunnels proposed in this invention;

[0039] Figure 8 This is a perspective view of the ventilation base structure of a local dust removal device for tunnels proposed in this invention;

[0040] Figure 9 This is a perspective view of the limiting groove structure of a local dust removal device for tunnels proposed in this invention;

[0041] Figure 10 This is a perspective view of the scissor frame component structure of a local dust removal device for tunnels proposed in this invention.

[0042] In the diagram: 1. Mobile trolley; 11. Dust sensor; 2. Fan; 21. Support frame; 22. Roller; 23. Conveying pipe; 24. Drive motor; 3. Arc-shaped conveying pipe; 31. Scissor frame component; 32. Support pipe; 33. Roller; 34. Shock-absorbing spring; 35. Elastic air outlet pipe; 36. Air outlet nozzle; 4. Positioning sleeve; 41. Moving block; 42. Adjusting screw; 43. Fixing rod; 44. Spring surround plate; 45. Snap ring; 5. Spring conveying pipe; 51. Tension spring; 52. Counterweight box; 6. Ventilation base; 61. Limiting groove; 62. Ball bearing; 63. Sealing partition; 64. Tension spring; 65. Magnet. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] Reference Figure 1-10 A local dust removal device for tunnels includes a mobile trolley 1, the wheels of which can be replaced with tracked wheels and adjusted according to the flatness of the ground inside the tunnel. It also includes a dust sensor 11, a fan 2, a dust removal device, a fixing device, and a communication device installed on the mobile trolley 1.

[0045] Dust sensor 11 is fixedly installed on the upper surface of mobile trolley 1, and fan 2 is set on one side of mobile trolley 1. Depending on the dust situation in the tunnel, the fan can be replaced with a high-pressure water pump, so that it can deliver air to the tunnel or spray water to achieve dust suppression in multiple ways.

[0046] like Figure 2-3 As shown, the dust removal device includes an arc-shaped conveying pipe 3 for transmitting air and a scissor frame component 31. The dust removal device is located above the mobile trolley 1. The scissor frame component 31 connects multiple arc-shaped conveying pipes 3 to perform the unfolding and retraction operations.

[0047] Furthermore, in order to facilitate the movement of the mobile trolley 1 to the depth of the tunnel for dust removal, a support frame 21 is fixedly installed on the upper surface of the mobile trolley 1. Then, the two ends of the support frame 21 are fixedly installed with rollers 22 through bearings. In order to deliver air to the arc-shaped conveying pipe 3, a conveying pipe 23 is fixedly installed at the air outlet of the fan 2. Then, the conveying pipe 23 is wound around the outer surface of the roller 22, and the other end is fixedly connected to an arc-shaped conveying pipe 3. In order to automatically rewind and release the conveying pipe 23, a drive motor 24 is fixedly installed at one end of the roller 22. The outer surface of the drive motor 24 is fixedly installed with the outer surface of the support frame 21.

[0048] Furthermore, in order to increase the dust removal area, multiple arc-shaped conveying pipes 3 are arranged in a rectangular array. In order to fit the inner top wall of the tunnel, the outer surface of the arc-shaped conveying pipes 3 is curved. In order to facilitate the expansion and contraction of multiple arc-shaped conveying pipes 3, the hinge of the scissor frame component 31 is fixedly installed to the outer surface of the arc-shaped conveying pipes 3. The scissor frame component 31 is formed by hinges between the middle end and both ends of multiple connecting rods.

[0049] like Figure 10 In order to facilitate increasing the spacing between the arc-shaped conveying pipes and adjust it according to the dust conditions in the tunnel, the connecting rod in the scissor frame component 31 can be composed of a telescopic rod. The scissor frame component 31 can be easily disassembled and replaced with scissor frame components 31 of different specifications and strokes.

[0050] To facilitate the movement of the arc-shaped conveying pipe 3, a support pipe 32 is fixedly installed on the upper surface of the arc-shaped conveying pipe 3, and then a roller 33 is slidably inserted into the inner wall of the support pipe 32. In order to dampen the roller 33 and facilitate the roller 33 to roll on the inner top wall of the tunnel, a damping spring 34 is fixedly installed on the lower surface of the roller 33, and the other end of the damping spring 34 is fixedly installed to the inner wall of the support pipe 32.

[0051] Furthermore, to facilitate the storage and air outlet operation of the arc-shaped conveying pipe 3, an elastic air outlet pipe 35 is fixedly connected to the outer surface of the arc-shaped conveying pipe 3. The elastic air outlet pipe 35 is made of silicone or rubber material, has elasticity, and can facilitate the passage and storage of personnel. Multiple elastic air outlet pipes 35 are evenly distributed along the outer surface of the arc-shaped conveying pipe 3. In order to uniformly supply air to the tunnel, an air outlet nozzle 36 distributed in a rectangular array is fixedly connected to the outer surface of the elastic air outlet pipe 35. The elastic air outlet pipes 35 are distributed horizontally and vertically. The air outlets of the horizontally distributed elastic air outlet pipes 35 face downwards, and the air outlets of the vertically distributed elastic air outlet pipes 35 face to both sides, so that the air or water mist delivered by the elastic air outlet pipes 35 can form an air curtain or water curtain. The water curtain can isolate dust in the dust-proof area to prevent dust from being sprayed out, reduce dust in the area, accelerate the dust reduction effect, and prevent dust from drifting out.

[0052] like Figure 4-6As shown, the fixing device includes a movable locking block 41 for fixing the arc-shaped conveying pipe 3 and an adjusting screw 42. The fixing device is located above the moving trolley 1. The adjusting screw 42 adjusts the two opposing movable locking blocks 41 to move horizontally relative to each other or in opposite directions.

[0053] Furthermore, in order to fix the arc-shaped conveying pipe 3, a positioning sleeve 4 is fixedly installed on the upper surface of the moving trolley 1. In order to limit the movement of the moving block 41, the two sides of the positioning sleeve 4 are slidably inserted into the moving block 41 through the through holes. In order to drive the rotating adjusting screw 42 to move the two moving blocks 41, the inner wall of one moving block 41 is rotatably connected to the outer surface of the adjusting screw 42, and the inner wall of the other moving block 41 is threadedly connected to one end of the adjusting screw 42. In order to facilitate the fixing of the arc-shaped conveying pipe 3, a fixing rod 43 is fixedly installed at both ends of the arc-shaped conveying pipe 3 on both sides. Then, the outer surface of the fixing rod 43 is slidably inserted into one end of the moving block 41 through the groove.

[0054] Furthermore, in order to stably fix the arc-shaped conveying pipe 3, a spring retaining plate 44 is fixedly installed on the inner wall of the positioning sleeve 4. Then, one end of the fixing rod 43 passes through the center of the annular base plate of the spring retaining plate 44. The spring retaining plate 44 is composed of an annular base plate and multiple spring plates fixed on the annular base plate to form an annular shape. In order to compress the spring retaining plate 44, a retaining ring 45 is fixedly installed on the upper surface of the moving block 41. Then, the outer surface of the retaining ring 45 is slidably connected to the outer surface of the spring retaining plate 44.

[0055] like Figure 7-9 As shown, the connecting device is located on the outer surface of the dust removal device. The connecting device includes a conveying mechanism and a connecting mechanism. The conveying mechanism connects multiple arc-shaped conveying pipes 3 and then conveys the air drawn by the fan 2. The connecting mechanism releases the seal on one end of the arc-shaped conveying pipe 3 after the multiple arc-shaped conveying pipes 3 are unfolded.

[0056] The conveying mechanism is installed on the outer surface of the arc-shaped conveying pipe 3. In order to facilitate the connection between multiple arc-shaped conveying pipes 3, a connecting spring conveying pipe 5 is fixed on the outer surface of the arc-shaped conveying pipe 3. The spring conveying pipe 5 is in the shape of a spring. In order to facilitate the reset of the spring conveying pipe 5 and the arc-shaped conveying pipe 3, a tension spring 51 is fixedly installed inside the spring conveying pipe 5.

[0057] Furthermore, in order to facilitate the storage of the spring conveying tube 5, a counterweight box 52 is fixedly installed at the other end of two adjacent spring conveying tubes 5. In order to facilitate the connection between the two spring conveying tubes 5, one end of the spring conveying tube 5 extends through the inner wall of the counterweight box 52 into its interior.

[0058] A connecting mechanism is installed inside the arc-shaped conveying pipe 3. To seal one end of the arc-shaped conveying pipe 3, a venting base 6 is fixedly installed on the inner wall of the arc-shaped conveying pipe 3. A through hole is opened on the upper surface of the venting base 6. A limiting groove 61 is fixedly installed on the upper surface of the venting base 6. Then, a sealing partition 63 is slidably inserted into the inner wall of the limiting groove 61 to seal the through hole on the venting base 6. To facilitate the movement of the sealing partition 63, a rectangular array of balls 62 is rotatably connected to the inner wall of the limiting groove 61. Then, the outer surface of the sealing partition 63 is slidably connected to the outer surface of the balls 62. To facilitate the reset of the sealing partition 63, tension springs 64 are fixedly installed on both sides of the outer surface of the sealing partition 63. Then, the other end of the tension spring 64 is fixedly connected to the inner wall of the arc-shaped conveying pipe 3.

[0059] Furthermore, in order to automatically move the sealing partition 63, a magnet 65 is fixedly installed on the outer surface of the arc-shaped conveying pipe 3, and then the magnet 65 is magnetically connected to the sealing partition 63.

[0060] Working principle: After inserting the fixing rods 43 at the lower end of the arc-shaped conveying pipes 3 on both sides into the positioning sleeves 4 on the moving trolley 1, the adjusting screw 42 is rotated, which causes the adjusting screw 42 to drive the moving blocks 41 on both sides to move relative to each other, so that the lower end of the fixing rod 43 can be inserted and fixed. At the same time, the retaining rings 45 on both sides move relative to each other, causing the spring plate 44 to retract, and fixing the fixing rod 43 again.

[0061] After the fixing rods 43 on both sides are fixed, one end of the conveying pipe 23 is connected to the air outlet of the fan 2. Then, the moving trolley 1 at the front is controlled to move into the tunnel. The moving trolley 1 at the front moves the upper arc-shaped conveying pipe 3 together. The retracted arc-shaped conveying pipe 3 unfolds, the connecting rod on the scissor frame deflects, and the magnet 65 in contact with the arc-shaped conveying pipe 3 leaves its contact surface. The magnetic force decreases, and the sealing partition 63 is released from the attracted state. It is then reset by the elastic force of the tension spring 64 and moves on the inner wall of the limiting groove 61, causing the ball bearing 62 to rotate. The movement exposes the through hole on the ventilation base 6, the arc-shaped conveying pipe 3 unfolds, the spring conveying pipe 5 and the tension spring 51 are pulled, the hanging counterweight box 52 is lifted, the fan 2 starts, the external air is drawn in and then conveyed through the arc-shaped conveying pipe 3 connected to the conveying pipe 23, the air supports the elastic air outlet pipe 35 on the arc-shaped conveying pipe 3, the air is sprayed out through the air outlet nozzle 36, and at the same time the excess air enters the second arc-shaped conveying pipe 3 through the spring conveying pipe 5, and so on, the air sprayed out by the air outlet nozzle 36 blows the dust in the tunnel;

[0062] The mobile trolley 1 moves the arc-shaped conveying pipe 3 deeper into the tunnel. At the same time, the drive motor 24 on the mobile trolley 1 starts, which drives the roller 22 on the support frame 21 to rotate, releasing the conveying pipe 23 to facilitate the movement of the mobile trolley 1. A water spraying device can be set behind the tunnel to suppress the dust. The dust sensor 11 on the mobile trolley 1 detects the amount of dust in the tunnel. When the amount of dust is lower than the set threshold, the mobile trolley 1 moves backward and out of the tunnel.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A local dedusting device for tunnels, comprising a mobile trolley (1), characterized in that: It also includes a dust sensor (11), a fan (2), a dust removal device, a fixing device, and a connecting device installed on the mobile trolley (1); The dust sensor (11) is fixedly installed on the upper surface of the mobile trolley (1), and the fan (2) is located on one side of the mobile trolley (1); The dust removal device includes an arc-shaped conveying pipe (3) for transmitting air and a scissor frame component (31). The dust removal device is located above the mobile trolley (1). The scissor frame component (31) connects multiple arc-shaped conveying pipes (3) and performs expansion and contraction operations. The fixing device includes a movable locking block (41) for fixing the arc-shaped conveying pipe (3) and an adjusting screw (42). The fixing device is located above the moving trolley (1). The adjusting screw (42) adjusts the two opposing movable locking blocks (41) to move horizontally relative to each other or in opposite directions. The fixing device also includes a positioning sleeve (4), the lower surface of which is fixedly installed on the upper surface of the moving trolley (1). The two sides of the positioning sleeve (4) are slidably inserted into the moving block (41) through through holes. The inner wall of one moving block (41) is rotatably connected to the outer surface of the adjusting screw (42), and the inner wall of the other moving block (41) is threadedly connected to one end of the adjusting screw (42). Both ends of the two arc-shaped conveying pipes (3) are fixedly installed with fixing rods (43). The outer surface of the fixing rods (43) is slidably inserted into one end of the moving block (41) through grooves. A spring plate (44) is fixedly installed on the inner wall of the positioning sleeve (4), one end of the fixing rod (43) passes through the center of the spring plate (44), and a retaining ring (45) is fixedly installed on the upper surface of the moving block (41). The outer surface of the retaining ring (45) is slidably connected to the outer surface of the spring plate (44). The connecting device is located on the outer surface of the dust removal device. The connecting device includes a conveying mechanism and a connecting mechanism. The conveying mechanism will connect the multiple arc-shaped conveying pipes (3) and then convey the air drawn by the fan (2). The connecting mechanism will release the seal on one end of the arc-shaped conveying pipe (3) after the multiple arc-shaped conveying pipes (3) are unfolded. The communication mechanism includes a ventilation base (6), the outer surface of which is fixedly installed to the inner wall of the arc-shaped conveying pipe (3), a limiting groove (61) is fixedly installed on the upper surface of the ventilation base (6), a ball bearing (62) arranged in a rectangular array is rotatably connected to the inner wall of the limiting groove (61), a sealing partition (63) is slidably inserted into the inner wall of the limiting groove (61), the outer surface of the sealing partition (63) is slidably connected to the outer surface of the ball bearing (62), and tension springs (64) are fixedly installed on both sides of the outer surface of the sealing partition (63), the other end of the tension springs (64) is fixedly connected to the inner wall of the arc-shaped conveying pipe (3); A magnet (65) is fixedly installed on the outer surface of the arc-shaped conveying pipe (3), and the magnet (65) is magnetically connected to the sealing partition (63).

2. The local dust removal device for tunnels according to claim 1, characterized in that: A support frame (21) is fixedly installed on the upper surface of the mobile trolley (1). Wire rollers (22) are fixedly installed at both ends of the support frame (21) through bearings. A conveying pipe (23) is fixedly installed at the air outlet end of the fan (2). The other end of the conveying pipe (23) is fixedly connected to an arc-shaped conveying pipe (3) after being wound around the outer surface of the wire roller (22). A drive motor (24) is fixedly installed at one end of the wire roller (22). The outer surface of the drive motor (24) is fixedly installed on the outer surface of the support frame (21).

3. The local dust removal device for tunnels according to claim 1, characterized in that: Multiple arc-shaped conveying pipes (3) are arranged in a rectangular array. The outer surface of the arc-shaped conveying pipe (3) is arc-shaped. The hinge of the scissor bracket component (31) is fixedly installed on the outer surface of the arc-shaped conveying pipe (3). A support pipe (32) is fixedly installed on the upper surface of the arc-shaped conveying pipe (3). A roller (33) is slidably inserted into the inner wall of the support pipe (32). A shock-absorbing spring (34) is fixedly installed on the lower surface of the roller (33). The other end of the shock-absorbing spring (34) is fixedly installed on the inner wall of the support pipe (32).

4. A local dust removal device for tunnels according to claim 1, characterized in that: The outer surface of the arc-shaped conveying pipe (3) is fixedly connected to an elastic air outlet pipe (35), and multiple elastic air outlet pipes (35) are distributed at equal distances along the outer surface of the arc-shaped conveying pipe (3). The outer surface of the elastic air outlet pipe (35) is fixedly connected to an air outlet nozzle (36) arranged in a rectangular array.

5. A local dust removal device for tunnels according to claim 1, characterized in that: The conveying mechanism includes a spring conveying tube (5), one end of which is fixedly connected to the outer surface of the arc-shaped conveying tube (3), and a tension spring (51) is fixedly installed inside the spring conveying tube (5).

6. A local dust removal device for tunnels according to claim 5, characterized in that: A counterweight box (52) is fixedly installed at the other end of each of the two adjacent spring conveying tubes (5), and one end of the spring conveying tube (5) extends through the inner wall of the counterweight box (52) into its interior.

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