Ventilation and dust removal equipment for tunnel construction

Abstract

The invention relates to the technical field of tunnel dust removal, in particular to ventilation and dust removal equipment for tunnel construction, which comprises an arched frame, a driver and mountain wheels, a driver is fixedly connected to each of the left part and the right part of the arched frame; each driver is rotationally connected with a mountain wheel; the device further comprises an arc-shaped plate, isolation canvas and the like. An arc-shaped plate is fixedly connected to the inner arc surface of the arch-shaped frame; the front side face of the arc-shaped plate is fixedly connected with two pieces of isolation canvas distributed in a bilateral symmetry mode. A plastic shielding curtain is arranged at the lower end of each piece of isolation canvas. The plastic shielding curtain composed of a plurality of strip-shaped plastics is used for providing a discharge port for separating a tunnel so as to reduce the impact force of impact waves on the whole device, meanwhile, the expanded arched cylindrical air bag has a self-rotation function, the impact force acting on the device is further reduced, damage of the impact force to the device is reduced, and the service life of the device is prolonged. Therefore, the method has sustainability.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel dust removal, and in particular to ventilation and dust removal equipment for tunnel construction. Background Art

[0002] When tunnels are excavated through drilling and blasting operations, not only will harmful gases in the geology be released, but also a large amount of smoke and dust will be generated, which poses a serious threat to the health of construction workers. In the prior art, forced ventilation is generally used, and fresh air is added to the tunnel through a fan to dilute the air in the tunnel. The diluted polluted air is extracted by an exhaust fan to exhaust smoke and reduce dust concentration, thereby achieving the purpose of improving the environment in the tunnel. However, this smoke exhaust and dust removal method generally has the disadvantages of being time-consuming, having large ventilation resistance, high energy consumption and high cost.

[0003] Based on this, there are corresponding equipment treatments in the prior art. A Chinese patent (CN103306702A) discloses an inflatable isolation device for tunnel ventilation construction. The invention sets an isolation device at the second lining position of the tunnel to form an isolation barrier for polluted air inside the tunnel. Isolation is performed before blasting, and the smoke generated after blasting is discharged centrally. Its working principle is to isolate and replace the polluted air for centralized treatment, which can effectively avoid secondary pollution in other uncontaminated areas in the tunnel. However, the drilling and blasting operation will generate shock waves, and the shock waves will carry a large amount of gravel, and the isolation device is set in the tunnel to divide the tunnel into two parts. This causes the shock waves generated by the drilling and blasting operation to act on the isolation device, causing damage to the isolation device, making the isolation device unusable in subsequent tunnel construction. Summary of the invention

[0004] The purpose of the present invention is to overcome the disadvantage that the shock wave generated by the drilling and blasting operation will act on the existing isolation device, causing damage to the isolation device and rendering the isolation device unusable in subsequent tunnel construction, and to provide a ventilation and dust removal device which can divide the tunnel into two parts, so as to facilitate the removal of harmful gases and dust generated during tunnel construction and avoid harm to the health of construction workers.

[0005] Another object of the present invention is to provide a ventilation and dust removal equipment for tunnel construction having the above functions.

[0006] The embodiment of the present invention is realized by the following technical scheme: a ventilation and dust removal equipment for tunnel construction, comprising an arch frame, a driver and a mountain wheel; a driver is fixedly connected to the left and right parts of the arch frame; each driver is rotatably connected to a mountain wheel; it also comprises an arc plate, an isolation canvas, a traction mechanism, an air pump, a U-shaped hose, a rotating joint, an arched cylindrical airbag, a ventilation mechanism and an air suction hood; an arc plate is fixedly connected to the inner arc surface of the arch frame; two isolation canvases symmetrically distributed on the left and right are fixedly connected to the front side of the arc plate; a plastic shielding curtain is arranged at the lower end of each isolation canvas; a groove is provided on each driver; each groove is connected to a A traction mechanism for providing traction force; an arched cylindrical groove is provided on the outer arc surface of the arch frame; two vacuum pumps are fixedly connected in the arch frame; the output end of each vacuum pump is connected to a U-shaped hose; both ends of the arched cylindrical groove are rotatably connected to a rotating joint; the rotating joint is rotatably connected to the corresponding U-shaped hose, and the rotating joint is connected to the corresponding U-shaped hose; the two rotating joints are commonly connected to an arched cylindrical airbag; an air suction hood for removing harmful gases and dust is embedded in the outer arc surface of the arch frame, and the air suction hood is located in front of the arched cylindrical groove; the arch frame and the air suction hood are commonly connected to a ventilation mechanism for providing suction force for the air suction hood and filtering harmful gases and dust.

[0007] In addition, it is particularly preferred that the traction mechanism includes an electric push rod, a circular shaft, a cone, a rotating plate and a guide plate; the electric push rod is fixed in the groove; the telescopic part of the electric push rod is fixed to the circular shaft; the end of the circular shaft is fixed to the cone; two notches are respectively provided at the left quarter point of the outer surface of the circular shaft and the right quarter point of the outer surface; four inclined rotating plates are rotatably connected to the circular shaft through a torsion spring, and the connection between the rotating plate and the circular shaft is located in the corresponding notch, and the maximum rotation angle of the rotating plate is perpendicular to the circular shaft; two guide plates are fixed on the circular shaft; the guide plate is in contact with two adjacent rotating plates, and the guide plate and the two adjacent rotating plates together form a V-shaped structure; the angle between the electric push rod, the circular shaft, the cone, the rotating plate and the guide plate and the ground is degrees.

[0008] In addition, it is particularly preferred that the ventilation mechanism includes an exhaust fan, a curved pipe and a filter box; a plurality of exhaust fans are fixedly connected in the arch frame; the input ends of all the exhaust fans are commonly connected to the suction hood; the output end of each exhaust fan is connected to a curved pipe; a plurality of filter boxes are fixedly connected to the inner curved surface of the arch frame; the filter boxes are connected to the corresponding curved pipes.

[0009] In addition, it is particularly preferred that a balancing mechanism is also included, each driver is connected to a balancing mechanism for keeping the arch frame, the driver and the mountain wheel balanced, and the two balancing mechanisms are symmetrically distributed left and right; the balancing mechanism includes a guide plate, a fixed plate and a universal wheel; the lower surface of the left driver is fixedly connected to two guide plates that are symmetrically distributed front and back, and the guide plates are inclined; the mountain wheel is located between the two guide plates; each guide plate is fixedly connected to a fixed plate; each fixed plate is fixedly connected to a number of universal wheels.

[0010] In addition, it is particularly preferred that a supporting mechanism is also included, and the arch frame is connected to a supporting mechanism for supporting the isolation canvas; the supporting mechanism includes a mounting plate, a motor, a cylinder and a hollow rod; a plurality of straps are provided on the rear side of each isolation canvas; a mounting plate is fixedly connected to the inner left and inner right parts of the arch frame; a motor is fixedly connected to each mounting plate; a cylinder is fixedly connected to the output shaft of each motor; a hollow rod is connected to each cylinder, and the hollow rod passes through the arch frame; two slide grooves are provided on one of the hollow rods, and round sleeves are slidably provided on the two slide grooves.

[0011] In addition, it is particularly preferred that the supporting mechanism also includes a folding rod; a folding rod is movably connected to each hollow rod, and the folding rod is movably connected to the inner curved surface of the arch frame, and the folding rod is used to improve the stability of the isolation canvas.

[0012] In addition, it is particularly preferred that it also includes a blower and a circular tube; two blowers are fixedly connected to the arch frame; the output end of each blower is connected to a circular tube; the two circular tubes are each rotatably connected to a cylinder; the cylinder is set to be hollow, the cylinder is connected to the circular tube, and the cylinder is connected to the hollow rod; a number of blowing holes are opened on the hollow rod; and a number of through holes are opened on each isolation canvas.

[0013] Furthermore, it is particularly preferred that a screen is provided on the suction hood.

[0014] Furthermore, it is particularly preferred that a layer of wire mesh is provided on the front side of each insulating canvas.

[0015] In addition, it is particularly preferred that it also includes an arc-shaped water pipe and a water mist nozzle; the inner arc surface of the arch frame is provided with an arc-shaped water pipe, and the arc-shaped water pipe is located in front of the two isolation canvases; and a plurality of equidistantly distributed water mist nozzles are provided on the arc-shaped water pipe.

[0016] The beneficial effects are:

[0017] The ventilation and dust removal equipment for tunnel construction obtained by the present invention through the above design provides a discharge outlet for separating tunnels through a plastic shielding curtain composed of a plurality of strip-shaped plastics to reduce the impact force of the shock wave on the whole of the present invention. At the same time, the inflated arched cylindrical airbag has a self-rotation function to further reduce the impact force acting on the present invention. Compared with the existing isolation barrier, the present invention can completely intercept the smoke and harmful gases generated by the explosion, but the impact force generated by the explosion will also completely act on the isolation barrier, which can easily damage the surface and internal components of the isolation barrier, resulting in the isolation barrier being unable to be used continuously and not being sustainable. The present invention has the function of gradually reducing the impact force generated by the explosion, reducing the damage of the impact force to the present invention, and making the present invention sustainable.

[0018] The ventilation and dust removal equipment for tunnel construction obtained by the present invention through the above design is inserted into the soil through the V-shaped structure formed by the guide plate and the two adjacent rotating plates, which provides a traction force in the opposite direction for the present invention, so that the present invention can move in a balanced state and prevent the present invention from tipping over during the backward movement.

[0019] The ventilation and dust removal equipment for tunnel construction obtained by the present invention through the above design forms a circulating airflow in the construction section of the tunnel through the air flows blown out by the several blowing holes of the hollow rod and the air flows sucked away by the suction hood, which can quickly eliminate the dust and harmful gases in the tunnel construction section and replace them with fresh air, thereby preventing subsequent construction personnel from being harmed by harmful gases and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] In the attached picture:

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the driver, mountain wheels, traction mechanism and balance mechanism of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the circular shaft, rotating plate and guide plate of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of an arch frame, an air pump, a U-shaped hose, a rotary joint, an arched cylindrical air bag, a ventilation mechanism and an air suction hood of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the arch frame, ventilation mechanism and suction hood of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0027] Figure 6 It is a three-dimensional structural schematic diagram of the arch frame, arc plate, isolation canvas and supporting mechanism of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the mounting plate, motor, cylinder, hollow rod and round tube of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the hollow rod and the round sleeve of the ventilation and dust removal equipment for tunnel construction of the present invention;

[0030] Fig. 9 This is a schematic diagram of the operation of unfolding the hollow rods, folding rods and isolation canvas of the ventilation and dust removal equipment for tunnel construction of the present invention.

[0031] In the figure: 1-arch frame, 2-drive, 3-mountain wheel, 4-arc plate, 5-isolation canvas, 6-arch cylindrical airbag, 7-air suction cover,

[0032] 101-guide plate, 102-fixed plate, 103-universal wheel,

[0033] 201-electric push rod, 202-round shaft, 203-cone, 204-rotating plate, 205-guide plate,

[0034] 301-air pump, 302-U-shaped hose, 303-rotating joint, 304-exhaust fan, 305-bend pipe, 306-filter box,

[0035] 401-mounting plate, 402-motor, 403-cylinder, 404-hollow rod, 405-folding rod, 406-blower, 407-round tube,

[0036] 501-arc water pipe, 502-water mist nozzle,

[0037] 1001-sealing plate, 1002-arched cylindrical groove, 2001-groove, 5001-plastic shielding curtain, 5002-through hole, 7001-screen, 20201-notch, 40401-slide groove, 40402-round sleeve, 40403-blowing hole. DETAILED DESCRIPTION

[0038] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in the following figures, in order to make each layer and each component a recognizable size, the scale of each layer and each component is appropriately changed for schematic illustration. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0039] Example 1

[0040] A ventilation and dust removal equipment for tunnel construction, such as Figure 1-Figure 9 As shown, it includes an arch frame 1, a driver 2 and a mountain wheel 3; a driver 2 is fixedly connected to the left and right parts of the arch frame 1; each driver 2 is rotatably connected to a mountain wheel 3 through a rotating shaft, and the driver 2 is used to control the rotation of the mountain wheel 3;

[0041] It also includes an arc plate 4, an isolation canvas 5, a traction mechanism, an air pump 301, a U-shaped hose 302, a rotating joint 303, an arched cylindrical airbag 6, a ventilation mechanism and an air suction hood 7; the inner arc surface of the arch frame 1 is fixedly connected to the arc plate 4; the front side of the arc plate 4 is fixedly connected to two isolation canvases 5 that are symmetrically distributed on the left and right; Velcro is also provided on the two isolation canvases 5 for bonding the two isolation canvases 5 together to form a whole; a plastic shielding curtain 5001 is provided at the lower end of each isolation canvas 5, and the plastic shielding curtain 5001 is composed of a number of equally spaced plastic strips; each driver 2 is provided with a groove 2001; each groove 2001 is connected to a traction mechanism; the arch frame 1 An arched cylindrical groove 1002 is provided on the outer arc surface; two vacuum pumps 301 are connected by bolts inside the arch frame 1, and the two vacuum pumps 301 are symmetrically distributed; the output end of each vacuum pump 301 is connected to a U-shaped hose 302; the two ends of the arched cylindrical groove 1002 are rotatably connected to a rotating joint 303; the rotating joint 303 is rotatably connected to the corresponding U-shaped hose 302, and the rotating joint 303 is connected to the corresponding U-shaped hose 302; the two rotating joints 303 are commonly connected to an arched cylindrical airbag 6; the arched cylindrical airbag 6 is made of wear-resistant material; an air suction hood 7 is embedded in the outer arc surface of the arch frame 1, and the air suction hood 7 is located in front of the arched cylindrical groove 1002; the arch frame 1 and the air suction hood 7 are commonly connected to a ventilation mechanism.

[0042] The traction mechanism includes an electric push rod 201, a circular shaft 202, a cone 203, a rotating plate 204 and a guide plate 205; the electric push rod 201 is bolted in the groove 2001; the telescopic part of the electric push rod 201 is fixedly connected to the circular shaft 202; the end of the circular shaft 202 is welded with a cone 203; two notches 20201 are respectively provided at the left quarter point and the right quarter point of the outer surface of the circular shaft 202; four inclined rotating plates 204 are rotatably connected to the circular shaft 202 through a torsion spring , and the connection between the rotating plate 204 and the circular shaft 202 is located in the corresponding notch 20201, and the maximum rotation angle of the rotating plate 204 is perpendicular to the circular shaft 202; two guide plates 205 are fixedly connected to the circular shaft 202; the guide plate 205 is in contact with two adjacent rotating plates 204, and the guide plate 205 and the two adjacent rotating plates 204 together form a V-shaped structure; the angle between the electric push rod 201, the circular shaft 202, the cone 203, the rotating plate 204 and the guide plate 205 and the ground is 30 degrees.

[0043] The ventilation mechanism includes an exhaust fan 304, a curved pipe 305 and a filter box 306; three exhaust fans 304 are bolted inside the arch frame 1; the input ends of all the exhaust fans 304 are connected to the suction hood 7; the output end of each exhaust fan 304 is connected to a curved pipe 305; three filter boxes 306 are fixed to the inner curved surface of the arch frame 1; the filter boxes 306 are connected to the corresponding curved pipes 305.

[0044] It also includes a balancing mechanism, each driver 2 is connected to a balancing mechanism, and the two balancing mechanisms are symmetrically distributed on the left and right; the balancing mechanism includes a guide plate 101, a fixed plate 102 and a universal wheel 103; the lower surface of the left driver 2 is fixedly connected to two guide plates 101 that are symmetrically distributed front to back, and the guide plates 101 are inclined; the mountain wheel 3 is located between the two guide plates 101; each guide plate 101 is fixedly connected to a fixed plate 102; each fixed plate 102 is fixedly connected to three universal wheels 103.

[0045] It also includes a supporting mechanism, which is connected to the arch frame 1; the supporting mechanism includes a mounting plate 401, a motor 402, a cylinder 403 and a hollow rod 404; a plurality of straps are provided on the rear side of each isolation canvas 5; a mounting plate 401 is fixedly connected to the inner left and inner right parts of the arch frame 1; a motor 402 is bolted to each mounting plate 401; a cylinder 403 is fixedly connected to the output shaft of each motor 402; a hollow rod 404 is connected to each cylinder 403, and the hollow rod 404 passes through the arch frame 1; two slide grooves 40401 are provided on one of the hollow rods 404, and a round sleeve 40402 is slidably provided on the two slide grooves 40401.

[0046] The supporting mechanism also includes a folding rod 405; a folding rod 405 is hinged on each hollow rod 404, and the folding rod 405 is hinged to the inner arc surface of the arch frame 1. The folding rod 405 is used to improve the stability of the isolation canvas 5, making it more difficult for the isolation canvas 5 to be blown away by the impact force generated by the blast.

[0047] It also includes a blower 406 and a circular tube 407; two blowers 406 are fixedly connected to the arch frame 1; the output end of each blower 406 is connected to a circular tube 407; the two circular tubes 407 are each rotatably connected to a cylinder 403; the cylinder 403 is set to be hollow, the cylinder 403 is connected to the circular tube 407, and the cylinder 403 is connected to the hollow rod 404; a plurality of blowing holes 40403 are opened on the hollow rod 404; a plurality of through holes 5002 are opened on each isolation canvas 5.

[0048] Furthermore, in order to prevent soil blocks from entering the suction hood 7 and causing damage to the exhaust fan 304, a screen 7001 is provided on the suction hood 7.

[0049] Furthermore, in order to prevent the impact force generated by the explosion from carrying rubble and breaking the isolation canvas 5, a layer of metal wire mesh is provided on the front side of each isolation canvas 5.

[0050] Furthermore, in order to facilitate maintenance of the parts in the arch frame 1 , a sealing plate 1001 is detachably mounted on the arch frame 1 , and the blower 406 is fixedly connected to the sealing plate 1001 .

[0051] The working steps of this embodiment are:

[0052] The following directions Figure 1 As a reference, the side where the isolation canvas 5 is marked is the front side, and the side where the mountain wheel 3 is marked is the left side;

[0053] The following rotations are from front to back, from top to bottom, and from right to left.

[0054] The first step is to push the ventilation and dust removal equipment for tunnel construction into the tunnel to be constructed, and the ventilation and dust removal equipment is at a certain distance from the location of the tunnel construction.

[0055] In the second step, the construction workers connect an external power supply to all parts that need to be powered by electricity, then unfold the two isolation canvases 5, and stick the two isolation canvases 5 together with Velcro. Then, the two vacuum pumps 301 are controlled to start, and gas is transported into the arched cylindrical airbag 6 through the U-shaped hose 302 and the rotating joint 303, so that the arched cylindrical airbag 6 expands and contacts the inner upper wall of the tunnel and the inner wall of the arched cylindrical groove 1002, so as to block the gap between the arch frame 1 and the inner top wall of the tunnel. Then, the two vacuum pumps 301 are controlled to stop working, and the two traction mechanisms are controlled to operate synchronously, so as to Taking the traction mechanism as an example, the telescopic part of the electric push rod 201 is pushed out, driving the round shaft 202, the cone 203, the rotating plate 204 and the guide plate 205 to move obliquely downward together, so that the round shaft 202, the cone 203, the rotating plate 204 and the guide plate 205 enter the traction mechanism in the soil. In the process of the cone 203 being inserted into the soil, the expanded arched cylindrical airbag 6 contacts the top wall of the tunnel, providing a stable reaction force for the cone 203 to be inserted into the soil, avoiding the lack of a stable reaction force in the present invention, resulting in the cone 203 being unable to be inserted into the soil, and pushing the present invention to move backward;

[0056] After the cone 203 is inserted into the soil, the two supporting mechanisms are controlled to operate synchronously. Taking the supporting mechanism on the right as an example, the output shaft of the motor 402 is controlled to rotate counterclockwise, driving the cylinder 403 and the hollow rod 404 to rotate together, and the folding rod 405 is automatically unfolded. After the hollow rod 404 rotates to a horizontal state, the output shaft of the motor 402 stops rotating. The operation of the supporting mechanism on the left is the same as that of the supporting mechanism on the right. After the two hollow rods 404 are aligned, the construction personnel grab the round sleeve 40402 on the hollow rod 404 and move it on the slide groove 40401, so that one end of the round sleeve 40402 is put on the other hollow rod 404, so that the two hollow rods 404 are relatively fixed, and then the straps set on the rear sides of the two isolation canvases 5 are fixed on the hollow rod 404 and the folding rod 405. It should be noted that the blowing hole 40403 on the hollow rod 404 is connected to the through hole 5002 on the isolation canvas 5.

[0057] At this time, the tunnel is divided into two parts by the arch frame 1, two isolation canvases 5 and the inflated arched cylindrical airbags 6. One part is the tunnel construction section excavated by drilling and blasting operations, and the other part is the tunnel finishing section where the excavation work has been completed (referring to the section where cement pouring and other work will be carried out after the tunnel excavation is completed).

[0058] The third step, when the preparation work is completed, the construction personnel control the explosion of the explosives set in the tunnel through the remote control to blast the rock layer in the tunnel, and the impact force generated by the blasting will extend to the exit of the tunnel, and then act on the present invention. At this time, the plastic shielding curtain 5001 and the expanded arched cylindrical airbag 6 both play a role in reducing the impact force. After the plastic shielding curtain 5001 is subjected to the impact force, several strips of plastic will be lifted up backwards to allow the shock wave to pass through the present invention, giving the shock wave an outlet to reduce the impact force of the shock wave on the present invention as a whole, and the expanded arched cylindrical airbag 6 can be in the arched cylindrical groove. 1002 rotates in itself, so when the weakened impact force acts on the present invention, the impact force will push the present invention to move, further reducing the impact force acting on the present invention. Compared with the existing isolation barrier, the present invention can completely intercept the smoke and harmful gases generated by the explosion. However, the impact force generated by the explosion will also completely act on the isolation barrier, which is very likely to damage the surface and internal components of the isolation barrier, resulting in the isolation barrier being unable to be used continuously and not being sustainable. The present invention has the ability to gradually reduce the impact force generated by the explosion, reduce the damage to the present invention caused by the impact force, and make the present invention sustainable.

[0059] When the present invention moves backward under the action of the shock wave, it will also drive the two traction mechanisms to move backward together, even if the circular shaft 202, the cone 203, the rotating plate 204 and the guide plate 205 move backward in the soil. In the initial state, the guide plate 205 and the two adjacent rotating plates 204 together form a V-shaped structure, and the opening of the V-shaped structure faces backward. When the V-shaped structure moves backward, the soil accumulated in the V-shaped structure will gradually increase, thereby forcing the rotating plate 204 to gradually rotate. In the process of all the rotating plates 204 moving backward in the soil, a traction force in the opposite direction is provided to the present invention, so that the present invention can move in a balanced state, and the problem of the present invention tipping over during the backward movement is prevented. When the rotating plate 204 is squeezed by the soil to be fully unfolded, the resistance of the rotating plate 204 to the backward movement will reach the maximum, thereby forcing the present invention to stop moving backward until the shock wave generated by the explosion stops.

[0060] When the blasting of the present invention is finished, the three exhaust fans 304 are controlled to be turned on, so that the suction hood 7 generates suction force, and the dust and harmful gases in the tunnel construction section are sucked into the suction hood 7, forming a continuous outward airflow above the tunnel construction section, and then discharged from the output end of the exhaust fan 304 and the curved arc pipe 305 into the filter box 306, and the dust and harmful gases are filtered by the filter box 306 and then discharged to the tunnel finishing section, so as to remove the dust and harmful gases in the tunnel construction section. At the same time, the two blowers 406 are controlled to be turned on, and the air is continuously blown into the circular pipe 407 and the cylinder 408. 03 and the hollow rod 404, and then discharged from the several blowing holes 40403 of the hollow rod 404. The air passes through the several through holes 5002 of the isolation canvas 5 and is continuously blown toward the construction section of the tunnel, forming an airflow that continuously blows inward at the lower part of the tunnel construction section. In this way, the several blowing holes 40403 of the hollow rod 404 and the suction hood 7 form a circulating airflow in the construction section of the tunnel, which can quickly eliminate the dust and harmful gases in the tunnel construction section and replace them with fresh air, thereby preventing subsequent construction personnel from being harmed by harmful gases and dust.

[0061] It should be noted that the hollow rod 404 can not only replace the air inside the tunnel construction section, but also support the two isolation canvases 5 bonded together. Under the action of the hollow rod 404 and the folding rod 405, the two isolation canvases 5 will not separate to both sides after being subjected to the impact force of the explosion, thereby preventing harmful gases and dust in the tunnel construction section from flowing to the tunnel finishing section, increasing the difficulty of dust removal in the tunnel.

[0062] It should be noted that when the shock wave generated by the explosion passes through the plastic shielding curtain 5001, the plastic shielding curtain 5001 will automatically fall down under the action of gravity, and intercept the dust and harmful gases in the tunnel construction section again, preventing a large amount of dust and harmful gases from escaping into the tunnel finishing section.

[0063] It should be noted that when the present invention is pushed to move by the shock wave, after the arched cylindrical airbag 6 rubs against the top wall of the tunnel, some soil blocks on the top wall of the tunnel will fall down, and the soil blocks falling down will enter the suction hood 7, and then be sucked into the exhaust fan 304, causing damage to the exhaust fan 304 and affecting the normal use of the exhaust fan 304. For this reason, the falling soil blocks are intercepted by the screen 7001 to prevent the soil blocks from being sucked into the exhaust fan 304 and affecting the normal use of the exhaust fan 304.

[0064] In the fourth step, when the dust and harmful gases in the tunnel construction section are sucked out and replaced with fresh air, the three exhaust fans 304 are controlled to stop working and no longer absorb air. The construction personnel manually untie the straps tied to the hollow rod 404 and the folding rod 405, push the circular sleeve 40402 to reset, and the two hollow rods 404 are disconnected. Then the supporting mechanism is controlled to drive the connected parts to reset, and the two hollow rods 404 are changed from horizontal to inclined. Then the construction personnel gather the two isolation canvases 5 to the opposite sides and hang them respectively. On the two hollow rods 404, the two traction mechanisms are controlled to drive the connected parts to reset, and the cone 203, the rotating plate 204 and the guide plate 205 are pulled out of the soil in an inclined state. Then the vacuum pump 301 is controlled to start, and the gas in the arched cylindrical airbag 6 is extracted, so that the arched cylindrical airbag 6 becomes compressed again and no longer contacts the inner top wall of the tunnel. Then the construction personnel control the driver 2 to drive the mountain wheel 3 to rotate, so that the present invention moves backward away from the tunnel construction section, and then the construction personnel continue to excavate the tunnel.

[0065] It should be noted that when the present invention moves, the soil in the moving direction of the mountain wheels 3 is cleared through the guide plates 101 to prevent the soil from accumulating on the moving path of the mountain wheels 3, causing the mountain wheels 3 to fluctuate during the movement. At the same time, the universal wheels 103 fixed to the four guide plates 101 play a supporting role to prevent the present invention from tipping forward or backward during the movement.

[0066] It should be noted that after completing the dust removal work in the tunnel construction section, the present invention can directly control the driver 2 to drive the mountain wheel 3 to rotate, and then move the present invention in the tunnel without frequent disassembly and adjustment, thereby achieving the effect of convenient movement and reducing the workload of construction personnel.

[0067] Example 2

[0068] On the basis of Example 1, Figure 1 As shown, it also includes an arc-shaped water pipe 501 and a water mist nozzle 502; the inner arc surface of the arch frame 1 is provided with an arc-shaped water pipe 501, and the arc-shaped water pipe 501 is located in front of the two isolation canvases 5; a plurality of equidistantly distributed water mist nozzles 502 are arranged on the arc-shaped water pipe 501.

[0069] The working principle of this embodiment is:

[0070] When the construction workers are about to detonate the explosives, they first control several water mist nozzles 502 to open and continuously spray a large amount of water mist toward the tunnel construction section, forming a water mist curtain wall in front of the plastic shielding curtain 5001. After the subsequent explosives are detonated, although the shock wave will break the curtain wall formed by the water mist, the water mist will also settle the dust carried in the shock wave at this time, and the water mist nozzles 502 continue to spray water mist to settle the dust carried in the shock wave, preventing a large amount of dust from gushing out from the lifted plastic shielding curtain 5001 to the finishing section of the tunnel, and after the blasting is completed, when the dust is sucked by the suction hood 7, the water mist nozzles 502 continue to spray water mist to settle the dust, thereby reducing the filtering burden of the filter box 306.

[0071] It should be noted that the construction workers have connected an external water pipe to the end of the arc-shaped water pipe 501 in advance.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A ventilation and dust removal device for tunnel construction, comprising an arch frame (1), a driver (2) and a mountain wheel (3); a driver (2) is fixedly connected to the left and right parts of the arch frame (1); each driver (2) is rotatably connected to a mountain wheel (3); wherein: The invention also comprises an arc plate (4), an isolation canvas (5), a traction mechanism, an air pump (301), a U-shaped hose (302), a rotating joint (303), an arched cylindrical air bag (6), a ventilation mechanism and an air suction cover (7); the inner arc surface of the arch frame (1) is fixedly connected to the arc plate (4); the front side surface of the arc plate (4) is fixedly connected to two isolation canvases (5) that are symmetrically distributed on the left and right; the lower end of each isolation canvas (5) is provided with a plastic shielding curtain (5001); each driver (2) is provided with a groove (2001); each groove (2001) is connected to a traction mechanism for providing traction; the outer arc surface of the arch frame (1) is provided with an arched cylindrical groove (1002); two air pumps (301) are fixedly connected in the arch frame (1); 01); the output end of each vacuum pump (301) is connected to a U-shaped hose (302); the two ends of the arched cylindrical groove (1002) are rotatably connected to a rotating joint (303); the rotating joint (303) is rotatably connected to the corresponding U-shaped hose (302), and the rotating joint (303) is connected to the corresponding U-shaped hose (302); the two rotating joints (303) are commonly connected to an arched cylindrical air bag (6); the outer arc surface of the arched frame (1) is embedded with an air suction hood (7) for extracting harmful gases and dust, and the air suction hood (7) is located in front of the arched cylindrical groove (1002); the arched frame (1) and the air suction hood (7) are commonly connected to a ventilation mechanism for providing suction force for the air suction hood (7) and filtering harmful gases and dust.

2. A ventilation and dust removal equipment for tunnel construction according to claim 1, characterized in that: The traction mechanism comprises an electric push rod (201), a circular shaft (202), a cone (203), a rotating plate (204) and a guide plate (205); the electric push rod (201) is fixedly connected in the groove (2001); the telescopic part of the electric push rod (201) is fixedly connected to the circular shaft (202); the end of the circular shaft (202) is fixedly connected to the cone (203); two notches (20201) are respectively provided at the left quarter point and the right quarter point of the outer surface of the circular shaft (202); four inclined rotating plates (204) are rotatably connected to the circular shaft (202) through a torsion spring, The connection between the rotating plate (204) and the circular shaft (202) is located in the corresponding notch (20201), and the maximum rotation angle of the rotating plate (204) is perpendicular to the circular shaft (202); two guide plates (205) are fixedly connected to the circular shaft (202); the guide plate (205) contacts two adjacent rotating plates (204), and the guide plate (205) and the two adjacent rotating plates (204) together form a V-shaped structure; the angle between the electric push rod (201), the circular shaft (202), the cone (203), the rotating plate (204) and the guide plate (205) and the ground is degrees.

3. The ventilation and dust removal equipment for tunnel construction according to claim 1 is characterized in that: The ventilation mechanism comprises an exhaust fan (304), a curved pipe (305) and a filter box (306); a plurality of exhaust fans (304) are fixedly connected inside the arch frame (1); the input ends of all the exhaust fans (304) are commonly connected to the suction hood (7); the output end of each exhaust fan (304) is connected to a curved pipe (305); a plurality of filter boxes (306) are fixedly connected to the inner curved surface of the arch frame (1); and the filter boxes (306) are connected to the corresponding curved pipes (305).

4. The ventilation and dust removal equipment for tunnel construction according to claim 1 is characterized in that: The invention also comprises a balancing mechanism, wherein each driver (2) is connected to a balancing mechanism for maintaining the balance of the arch frame (1), the driver (2) and the mountain wheel (3), and the two balancing mechanisms are symmetrically distributed in the left and right directions; the balancing mechanism comprises a guide plate (101), a fixing plate (102) and a universal wheel (103); the lower surface of the left driver (2) is fixedly connected to two guide plates (101) symmetrically distributed in the front and back directions, and the guide plates (101) are inclined; the mountain wheel (3) is located between the two guide plates (101); each guide plate (101) is fixedly connected to a fixing plate (102); each fixing plate (102) is fixedly connected to a plurality of universal wheels (103).

5. The ventilation and dust removal equipment for tunnel construction according to claim 1 is characterized in that: The invention also comprises a supporting mechanism, wherein the arch frame (1) is connected with a supporting mechanism for supporting the isolation canvas (5); the supporting mechanism comprises a mounting plate (401), a motor (402), a cylinder (403) and a hollow rod (404); a plurality of straps are arranged on the rear side of each isolation canvas (5); a mounting plate (401) is fixedly connected to the inner left and inner right parts of the arch frame (1); a motor (402) is fixedly connected to each mounting plate (401); a cylinder (403) is fixedly connected to the output shaft of each motor (402); a hollow rod (404) is connected to each cylinder (403), and the hollow rod (404) passes through the arch frame (1); two slide grooves (40401) are arranged on one of the hollow rods (404), and a round sleeve (40402) is slidably arranged on the two slide grooves (40401) together.

6. The ventilation and dust removal equipment for tunnel construction according to claim 5 is characterized in that: The supporting mechanism also includes a folding rod (405); each hollow rod (404) is movably connected to a folding rod (405), and the folding rod (405) is movably connected to the inner arc surface of the arch frame (1), and the folding rod (405) is used to improve the stability of the isolation canvas (5).

7. The ventilation and dust removal equipment for tunnel construction according to claim 5 is characterized in that: It also includes a blower (406) and a circular tube (407); two blowers (406) are fixedly connected to the arch frame (1); the output end of each blower (406) is connected to a circular tube (407); the two circular tubes (407) are rotatably connected to a cylinder (403); the cylinder (403) is hollow, the cylinder (403) is connected to the circular tube (407), and the cylinder (403) is connected to the hollow rod (404); a plurality of blowing holes (40403) are provided on the hollow rod (404); and a plurality of through holes (5002) are provided on each isolation canvas (5).

8. The ventilation and dust removal equipment for tunnel construction according to claim 1 is characterized in that: A screen (7001) is provided on the suction hood (7).

9. The ventilation and dust removal equipment for tunnel construction according to claim 1, characterized in that: A layer of metal wire mesh is arranged on the front side of each isolation canvas (5).

10. The ventilation and dust removal equipment for tunnel construction according to claim 7, characterized in that: It also includes an arc-shaped water pipe (501) and a water mist nozzle (502); the inner arc surface of the arch frame (1) is provided with the arc-shaped water pipe (501), and the arc-shaped water pipe (501) is located in front of two isolation canvases (5); and a plurality of water mist nozzles (502) are arranged on the arc-shaped water pipe (501) and are distributed at equal distances.

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