A dust removal device and method for tunnel construction ventilation

Abstract

The present invention provides a dust removal device and method for ventilation in tunnel construction. The device is arranged in a tunnel and is used for dust removal and ventilation during face construction. The device comprises an arch support, which is slidably arranged in the tunnel along the tunnel excavation direction. A channel is arranged in the arch support, and a plurality of air ducts are arranged on both sides of the left and right sides of the channel. Two groups of dust-shielding members are symmetrically arranged on the arch support, and the dust-shielding members include a dust-shielding seat and a dust-shielding plate. The two groups of dust-shielding seats are located in the channel and slidably arranged on the arch support along the left and right directions. One end of the dust-shielding plate is connected to the dust-shielding seat, and the other end of the dust-shielding plate extends toward the face. The device solves the problems that it is difficult to remove dust at a newly blasted location during face construction, and that the traditional dust removal method has a long dust removal operation time and low efficiency.

Description

Technical Field

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

[0002] The face, also known as the face of a tunnel, is a term used in tunnel construction. It refers to the working face that is constantly advancing in tunnel excavation (coal mining, mining or tunnel engineering). In tunnel construction, the face of a tunnel is the direct working face where construction workers carry out blasting, excavation and other operations. Dust is generated in operations such as rock drilling, blasting, slag loading and shotcrete spraying. Dust is very harmful to the human body and is usually removed by dust removal vehicles or positive and negative pressure air ducts.

[0003] During the construction of the tunnel face, the front end of the blasted rock and soil is an inclined slope, and the tunnel at the blasting location is relatively narrow. It is inconvenient for the dust removal vehicle to remove dust from the slope of the soil pile after the blasting of the face. The dust generated by the blasting of the face is difficult to clean due to the lack of circulating airflow, and it usually takes a long time to completely settle. At the same time, since the face needs to be cleaned and other operations need to be performed, it is not convenient to set up air ducts to deep places for dust extraction. Even if air ducts are temporarily set up, the pumping efficiency is very low, resulting in problems such as long dust removal operation time and low efficiency during the construction of the face. Summary of the invention

[0004] The object of the present invention is to provide a dust removal device and method for tunnel construction ventilation, which solves the problems of difficulty in removing dust from just blasted areas during face construction, and long dust removal operation time and low efficiency of traditional dust removal methods.

[0005] The embodiment of the present invention is realized by the following technical scheme: a dust removal device for tunnel construction ventilation, arranged in a tunnel, for dust removal and ventilation during face construction, comprising an arch support, the arch support is arranged in the tunnel in a sliding manner along the tunnel excavation direction, a channel is arranged in the arch support, and a plurality of air ducts are arranged on both sides of the left and right sides of the channel;

[0006] Two groups of dust-shielding members are symmetrically arranged on the arch support, and the dust-shielding members include dust-shielding seats and dust-shielding plates. The two groups of dust-shielding seats are located in the channel and are slidably arranged on the arch support along the left and right directions. One end of the dust-shielding plate is connected to the dust-shielding seat, and the other end of the dust-shielding plate extends toward the palm face.

[0007] Furthermore, the inner cavity of the arched support is horizontally provided with a guide rail along the left-right direction, and the upper end of the dust isolation seat is slidably arranged on the guide rail;

[0008] The guide rail and the arched support above it are sealed by a first partition plate;

[0009] The arch support also includes a base, and the base is vertically arranged at the bottom of the left and right ends of the guide rail, and the two sides of the base that are away from each other are sealed with the arch support by a second partition plate;

[0010] The channel is surrounded by the guide rail and the two bases;

[0011] The plurality of air ducts located at both sides respectively penetrate through the corresponding second partition plate.

[0012] Furthermore, the dust-proof plate comprises a support arm, an upper suspension arm, a lower suspension arm, a push cylinder and a plurality of first electric roller blinds, the support arm is vertically slidably arranged on the side of the dust-proof seat close to the palm face, one end of the upper suspension arm is connected to the upper end of the support arm, and the other end of the upper suspension arm extends toward the palm face;

[0013] The lower suspension arm is spaced below the upper suspension arm, and one end of the lower suspension arm is hinged to the dust isolation seat; the two ends of the push cylinder are respectively hinged to the lower suspension arm and the support arm;

[0014] The upper hanging arm is provided with a plurality of the first electric rolling blinds in sequence, a slider is provided at the free end of the first electric rolling blind, the lower hanging arm is provided with a plurality of slide grooves, and the plurality of sliders are slidably provided in the plurality of slide grooves respectively.

[0015] Furthermore, a second electric rolling curtain is arranged on the base, and a free end of the second electric rolling curtain is connected to the dust isolation seat.

[0016] Furthermore, the first electric rolling curtain and the second electric rolling curtain have the same structure. The second electric rolling curtain includes a motor, a support, a roller and a hard curtain plate. The support and the motor of the first electric rolling curtain are both arranged on the upper hanging arm, the roller is rotatably arranged on the support, the output end of the motor is transmission-connected to the roller, one end of the hard curtain plate is wound around the roller, and the other end of the hard curtain plate is provided with the slider.

[0017] Furthermore, a slide rail and a plurality of guide rods are vertically arranged on the dust isolation seat, a slide seat is slidably arranged on the slide rail, and the slide seat is slidably sleeved on the plurality of guide rods;

[0018] The support arm is arranged on the slide seat;

[0019] It also includes a reducer, a lead screw and a nut, wherein the lead screw is rotatably arranged on the dust isolation seat, and the lead screw is arranged in parallel with the plurality of guide rods;

[0020] The nut is fixed on the slide seat, and the nut is sleeved on the lead screw and matched with the lead screw thread;

[0021] The reducer is arranged on the dust isolation seat, and the output end of the reducer is transmission-connected with the lead screw.

[0022] Furthermore, the dust-shielding member also includes a scissor-type lift, which is laterally arranged on the base, and a telescopic end of the scissor-type lift is connected to the dust-shielding seat.

[0023] Furthermore, the air ducts located on both sides include a positive pressure pipe and a negative pressure pipe, the positive pressure pipe extends out of the tunnel and is connected to an axial flow fan; the negative pressure pipe extends out of the tunnel and is connected to a dust collector.

[0024] Furthermore, a plurality of sealed air bags are arranged between the arch support and the tunnel, and the plurality of sealed air bags are connected to an air pump via an air pipe.

[0025] Further, a dust removal method for tunnel construction ventilation adopts a dust removal device for tunnel construction ventilation, comprising the following steps:

[0026] S1. When the face is blasted, the two groups of dust isolation seats are driven to move to both ends of the guide rail by the scissor-type lifters on the dust isolation parts on both sides, and the negative pressure pipes on both sides are started;

[0027] S2. After the face is blasted, the two dust shields are controlled to move toward each other and abut against each other, and the height of the upper boom is controlled according to the blasted height. Then the slope of the soil pile after blasting is observed, and the elevation angle of the lower boom is controlled by contracting the push cylinder to make the slope of the lower boom consistent with that of the soil pile, and the arch support is driven to move on one side of the face until the lower boom abuts against the soil pile, and the upper boom is raised at the same time to make it abut against the top of the blasting location, but the front end of the upper boom does not abut against the face;

[0028] S3, air is pumped into a plurality of sealing bags through an air pump, thereby sealing the gap between the arch support and the tunnel. At this time, the two dust isolation panels and the blasting position of the tunnel form a U-shaped space;

[0029] S4. Close the negative pressure pipe on one side and open the positive pressure pipe on that side to pump in air, and pump out the dusty air through the negative pressure pipe on the other side;

[0030] S5. After the dust generated by the blasting on the face is completely extracted, the two dust-isolating plates are driven to move to both sides to leave a middle passage for cleaning the soil pile generated by the blasting. At the same time, the positive pressure pipe is closed and the closed negative pressure pipe is opened;

[0031] S6. When cleaning the soil pile on the side, the negative pressure pipe on that side is closed, the positive pressure pipe pumps air, the negative pressure pipe on the other side operates normally, and the positive pressure pipe is closed;

[0032] S7. After all soil piles are cleared, the subsequent construction work of this section of the face is dust-removed and ventilated in the manner of steps S5-S6;

[0033] S8. When the next face is constructed, repeat steps S1-S7.

[0034] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0035] 1. After the blasting of the face, the two dust shields are controlled to move toward each other and abut against each other. At the same time, the height of the upper boom is controlled according to the blasting height. Then, the slope of the soil pile after blasting is observed, and the elevation angle of the lower boom is controlled by contracting the push cylinder to make the slope of the lower boom consistent with that of the soil pile. The arch support is driven to move on one side of the face until the lower boom abuts against the soil pile. At the same time, the upper boom is raised to abut against the top of the blasting site, but the front end of the upper boom does not abut against the face. At this time, a dust shield is inserted between the arch support and the face to form a A U-shaped cavity is formed, and both ends of the U-shaped cavity are connected to several air ducts on both sides; the negative pressure tube on one side is closed and the positive pressure tube on the side is opened to pump in air, and the dusty air is pumped out through the negative pressure tube on the other side; a U-shaped cavity is formed at the blasting site through dust-proof panels, and positive pressure air is supplied and negative pressure air is exhausted at both ends of the U-shaped cavity respectively, so that the dusty air in the U-shaped cavity can be quickly discharged, and then the dusty air generated after the blasting can be quickly discharged; then the dust generated at the face construction site can be quickly cleaned, which greatly improves the dust removal efficiency and quality.

[0036] 2. After the dust generated by the blasting on the face is extracted, drive the two dust-proof panels to move to both sides to leave a middle channel. During the movement of the two dust-proof panels to both sides, the upper boom needs to be appropriately lowered to adapt to the curved tunnel top, and enter the machinery and other equipment through the channel to clean up the soil pile generated by the blasting. At the same time, the positive pressure pipe is closed for air supply, and the closed negative pressure pipe is opened for exhaust. When the soil pile is cleaned through the channel, the negative pressure pipes on both sides are used for extraction. The air in the tunnel enters from the channel and bypasses the front end of the dust-proof panel, and moves to the side where the two dust-proof panels are away from each other, and is then extracted by the negative pressure pipes on both sides. As a result, the dust will not pass through one side of the channel and will not affect the workers.

[0037] 3. When cleaning the soil pile on the side, the negative pressure pipe on that side is closed, the positive pressure pipe pumps air, the negative pressure pipe on the other side operates normally, and the positive pressure pipe is closed; the air supply volume should be smaller than the air exhaust volume, the dust bypasses the front end of the dust isolation plate and is extracted from the negative pressure pipe on the other side, which can avoid the dust affecting the workers when cleaning the soil pile on the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the structure of a dust removal device for tunnel construction ventilation provided by the present invention;

[0040] Figure 2 for Figure 1 Structural schematic diagram of the cross section at AA;

[0041] Figure 3 A schematic diagram of the top view of the structure of a dust removal device for tunnel construction ventilation in steps S1 and S5 in a dust removal device and method for tunnel construction ventilation provided by the present invention;

[0042] Figure 4 A schematic diagram of the top view of the structure of a dust removal device for tunnel construction ventilation in steps S2-S4 of a dust removal device and method for tunnel construction ventilation provided by the present invention;

[0043] Figure 5 A schematic diagram of the top view of the structure of a dust removal device for tunnel construction ventilation in step S6 of a dust removal device and method for tunnel construction ventilation provided by the present invention;

[0044] Figure 6 A schematic structural diagram of a first electric rolling curtain and a second electric rolling curtain in a dust removal device for tunnel construction ventilation provided by the present invention;

[0045] Icons: 1. Tunnel, 11. Face, 2. Arch support, 21. Passage, 22. Guide rail, 23. First partition, 24. Base, 25. Second partition, 26. Sealing air bag, 27. Air pipe, 28. Air pump, 29. Baffle, 3. Air duct, 31. Positive pressure pipe, 32. Negative pressure pipe, 33. Axial flow fan, 34. Dust collector, 4. Dust separator, 41. Slide rail, 42. Guide rod, 43. Slide seat, 44. Reducer, 45. Screw, 46. Nut, 5. Dust separator, 51. Support arm, 52. Upper suspension arm, 53. Lower suspension arm, 531. Slide groove, 54. Push cylinder, 55. First electric roller shutter, 551. Slider, 6. Second electric roller shutter, 61. Motor, 62. Support, 63. Roller, 64. Hard curtain plate, 7. Scissor lift. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Reference Figures 1 to 6 As shown, the present embodiment provides a dust removal device for tunnel construction ventilation, which is arranged in the tunnel 1 and is used for dust removal and ventilation during the construction of the face 11, including an arch support 2, the shape of the arch support 2 is an inverted U-shape which is consistent with the inner cavity of the tunnel 1, the arch support 2 and the tunnel 1 are gap-matched, the arch support 2 is arranged in the tunnel 1 to slide along the excavation direction of the tunnel 1, a trolley is arranged at the bottom of the arch support 2 to drive the entire device to move in the tunnel 1, some baffles 29 can be arranged between the bottom of the arch support 2 and the bottom of the tunnel to block the gap between the bottom of the arch support 2 and the bottom of the tunnel, a channel 21 is arranged in the arch support 2, and a plurality of air ducts 3 are arranged on both sides of the left and right sides of the channel 21.

[0049] Two groups of dust-shielding parts are symmetrically arranged on the arch support 2, and the dust-shielding parts include a dust-shielding seat 4 and a dust-shielding plate 5. The two groups of dust-shielding seats 4 are located in the channel 21 and are slidably arranged on the arch support 2 along the left and right directions. One end of the dust-shielding plate 5 is connected to the dust-shielding seat 4, and the other end of the dust-shielding plate 5 extends toward the palm face 11.

[0050] More specifically, a guide rail 22 is horizontally arranged in the inner cavity of the arch bracket 2 along the left and right directions, and the upper end of the dust isolation seat 4 is slidably arranged on the guide rail 22; a pulley is arranged on the top of the dust isolation seat 4, and the pulley is rollingly arranged on the guide rail 22 to support the entire dust isolation seat 4 and the dust isolation plate 5.

[0051] At the same time, if Figure 1 As shown, the guide rail 22 and the arch support 2 above it are sealed by a first partition 23; the arch support 2 also includes a base 24, and the bases 24 are vertically arranged at the bottom of the left and right ends of the guide rail 22, and the two sides of the two bases 24 away from each other are sealed by a second partition 25 with the arch support 2; the channel 21 is surrounded by the guide rail 22 and the two bases 24; and the plurality of air ducts 3 located on both sides are respectively penetrated by corresponding second partitions 25. Therefore, only the channel 21 in the entire arch support 2 is used for people and machines to walk and air circulation.

[0052] More specifically, Figure 1 and 2 As shown, a plurality of sealing air bags 26 are arranged between the arch support 2 and the tunnel 1, and the plurality of sealing air bags are connected to an air pump 28 through an air pipe 27. The air pump 28 controls the contraction or expansion of the sealing air bags 26. When the sealing air bags 26 are contracted, they are mainly used for the movement of the arch support 2, and when they are expanded, they can seal the gap between the arch support 2 and the tunnel 1.

[0053] At the same time, the air ducts 3 on both sides include a positive-pressure pipe 31 and a negative-pressure pipe 32. The positive-pressure pipe 31 extends out of the tunnel 1 and is connected to an axial-flow fan 33. The clean air outside the tunnel 1 is pumped at a positive pressure by the axial-flow fan 33 or other fans; and the negative-pressure pipe 32 extends out of the tunnel 1 and is connected to a dust collector 34. A negative pressure pump forms a negative pressure on the negative-pressure pipe 32, and then the air inside the tunnel 1 is extracted. The extracted gas enters the dust collector 34 for dust removal and purification and then is discharged. The dust collector 34 is usually a bag dust collector 34 or a pulse dust collector 34, etc.

[0054] More specifically, Figure 2 As shown, the dust-proof plate 5 includes a support arm 51, an upper hanging arm 52, a lower hanging arm 53, a push cylinder 54 and a plurality of first electric rolling shutters 55. The support arm 51 is vertically slidably arranged on the side of the dust-proof seat 4 close to the tunnel face 11. One end of the upper hanging arm 52 is connected to the upper end of the support arm 51, and the other end of the upper hanging arm 52 extends toward the tunnel face 11. Since the interior of the tunnel 1 is mostly arc-shaped, the upper hanging arm 52 needs to move up and down during the left-right movement to make itself as close as possible to the inner wall of the arc-shaped tunnel 1. At the same time, The lower arm 53 is arranged below the upper arm 52 at intervals, and one end of the lower arm 53 is hinged to the lower end of the dust isolation seat 4; the two ends of the push cylinder 54 are respectively hinged to the lower arm 53 and the support arm 51; the elevation angle of the lower arm 53 is controlled by the push cylinder 54, and the push cylinder 54 usually makes the push rod motor 61 control the elevation angle of the free end of the lower arm 53 so that it can fit as closely as possible with the inclined soil pile after blasting, thereby facilitating the dust isolation plate 5 to enter the space above the face 11 after blasting, so as to form an airway to extract the air containing dust;

[0055] When implementing it, Figure 2As shown, a plurality of first electric rolling curtains 55 are sequentially arranged on the upper suspension arm 52, a slider 551 is arranged at the free end of the first electric rolling curtain 55, a plurality of slide grooves 531 are arranged on the lower suspension arm 53, and the plurality of sliders 551 are respectively slidably arranged in the plurality of slide grooves 531. Since the free end of the lower suspension arm 53 needs to be lifted, a plurality of first electric rolling curtains 55 sequentially arranged between the upper suspension arm 52 and the lower suspension arm 53 form a board surface, and the free end of the first electric rolling curtain 55 is slidably arranged on the lower suspension arm 53 through the slider 551, and when the lower suspension arm 53 rotates, the hard curtain plates 64 of the plurality of first electric rolling curtains 55 are always in a vertical state and abut against each other to form a board surface.

[0056] More specifically, a second electric roller blind 6 is provided on the base 24, and a free end of the second electric roller blind 6 is connected to the dust shield seat 4, so that when the dust shield seat 4 moves left and right, the gap between the dust shield seat 4 and the base 24 is blocked by the second electric roller blind 6 being unfolded.

[0057] like Figure 2-6 As shown, the first electric roller curtain 55 and the second electric roller curtain 6 have the same structure, but the size of the second electric roller curtain 6 will be larger, there is only one of it, and it needs to cover the entire guide rail 22, the space between the base 24 and the dust shield 4. The first electric roller curtain 55 includes a motor 61, a support 62, a roller 63 and a hard curtain plate 64. The support 62 and the motor 61 of the first electric roller curtain 55 are both arranged on the upper suspension arm 52, and the roller 63 is rotatably arranged on the support 62. The output end of the motor 61 is transmission-connected to the roller 63, one end of the hard curtain plate 64 is wound around the roller 63, and a slider 551 is arranged at the other end of the hard curtain plate 64. During specific implementation, since a number of first electric rolling curtains 55 are provided on the upper suspension arm 52, the hard curtain boards 64 of the first electric rolling curtains 55 need to be located in the same plane and abut against each other in sequence, and a long hole is opened on the central axis of the upper suspension arm 52. The first electric rolling curtains 55 are distributed on both sides of the long hole in sequence, one on the left and one on the right. After the released hard curtain boards 64 pass through the long holes, they are located in the same plane and slide against each other. If necessary, rubber is provided on both sides of the front and back surfaces of the hard curtain boards 64 located at even-numbered positions to cover the gap between them and adjacent hard curtain boards 64 to form better air tightness.

[0058] During the process of retracting and extending the hard curtain plate 64, the first electric rolling curtain 55 and the second electric rolling curtain 6 control the rotation of the motor 61 according to the need of stretching, and combine the movement of the lower suspension arm 53 and the dust shield 4 to keep the respective hard curtain plates 64 straight. The hard curtain plate 64 can be made of light alloy metal material, such as aluminum or aluminum alloy, or plastic material. The hard curtain plate 64 of the second electric rolling curtain 6 can also be made of cloth or some soft materials, but the hard curtain plate 64 of the first electric rolling curtain 55 cannot be used because it is necessary to ensure that the lower When the upper end slides on the lower suspension arm 53, the overall hard curtain plate 64 will not be deformed, and a return spring can be set on the slide groove 531, one end of the return spring is connected to the slider 551, and the other end of the return spring is connected to the end of the slide groove 531 close to the dust filter seat 4, so that when the lower suspension arm 53 is raised, the slider 551 is driven by the motor 61 to move up in the inclined slide groove 531, and when the lower suspension arm 53 is subsequently reset downward, in addition to the weight of the slider 551, the return spring can also assist the slider 551 to move toward the side close to the dust filter seat 4.

[0059] A slide rail 41 and a plurality of guide rods 42 are vertically arranged on the dust isolation seat 4, a slide seat 43 is slidably arranged on the slide rail 41, and the slide seat 43 is slidably sleeved on the plurality of guide rods 42; a support arm 51 is arranged on the slide seat 43; since the entire dust isolation plate 5 is arranged on the dust isolation seat 4, and the upper suspension arm 52 is suspended, it is mainly supported by the support arm 51, and the support arm 51 needs to move up and down, so a reliable moving mechanism is required, which is slidably arranged on a plurality of guide rods 42 through the slide seat 43, and at the same time, its structural strength and stability are further enhanced by the slide rail 41, so as to ensure that when the slide seat 43 is driven to move up and down, the upper suspension arm 52 and its load can be stably driven to move up and down.

[0060] More specifically, Figure 2 As shown, it also includes a reducer 44, a lead screw 45 and a nut 46. The lead screw 45 is rotatably arranged on the dust isolation seat 4, and the lead screw 45 is arranged in parallel with a plurality of guide rods 42; the nut 46 is fixed on the slide 43, and the nut 46 is sleeved on the lead screw 45 and is threadedly matched with the lead screw 45; the reducer 44 is arranged on the dust isolation seat 4, and the output end of the reducer 44 is in transmission connection with the lead screw 45. The reducer 44 drives the lead screw 45 to rotate, and then drives the slide 43 to move up and down with the matched nut 46, thereby realizing the up and down movement of the upper suspension arm 52.

[0061] When implementing it, Figure 1As shown, the dust-proof member also includes a plurality of scissor-type lifts 7, which are transversely arranged on the base 24, and the telescopic ends of the scissor-type lifts 7 are connected to the dust-proof seat 4. The dust-proof seat 4 is driven to move left and right on the guide rail 22 by a plurality of scissor-type lifts 7. The scissor-type lifts 7 have a stable structure, and can not only bear the force in the extension direction, but also bear a strong moment in the direction of the tunnel 1, so as to form a stable supporting foundation for the dust-proof seat 4 when the subsequent air pump 28 is delivered, especially the plate surface formed after the second electric roller blind 6 is extended.

[0062] A dust removal method for tunnel construction ventilation, using a dust removal device for tunnel construction ventilation, comprising the following steps:

[0063] S1, when blasting at face 11, if Figure 3 As shown, the two groups of dust-shielding seats 4 are respectively driven to move to the two ends of the guide rail 22 by the scissor-type lifters 7 on the dust-shielding parts on both sides, leaking the middle channel 21, and starting the negative pressure pipes 32 on both sides; the air between the arch support 2 and the face 11 is extracted, and the gas expanded during blasting can go out through the channel 21 and is also extracted by the two negative pressure pipes 32. When the blasting is finished, the dust air that passed through the arch support 2 during blasting flows back and is extracted by the two negative pressure pipes 32, and at the same time, the dust at the blasting site can be prevented from spreading to one end of the tunnel entrance;

[0064] S2, after blasting of face 11, if Figure 4 As shown, the two dust shielding seats 4 are controlled to move toward each other and abut against each other, and at the same time, the height of the upper boom 52 is controlled according to the blasting height, and then the slope of the soil pile after blasting is observed, and the elevation angle of the lower boom 53 is controlled by contracting the push cylinder 54, so that the lower boom 53 is consistent with the slope of the soil pile, and the arch support 2 is driven to move on one side of the face 11 until the lower boom 53 abuts against the soil pile, and at the same time, the upper boom 52 is raised so that the upper boom 52 abuts against the top of the blasting location, but the front end of the upper boom 52 does not abut against the face 11; at this time, a dust shielding plate 5 is inserted between the arch support 2 and the face 11 to form a U-shaped cavity, and the two ends of the U-shaped cavity are connected to a number of air ducts 3 on both sides.

[0065] S3, air is then pumped into a plurality of sealing bags through an air pump 28, thereby sealing the gap between the arch support 2 and the tunnel 1. At this time, the two dust-proof panels 5 and the blasting position of the tunnel 1 form a U-shaped space;

[0066] S4, close the negative pressure pipe 32 on one side and open the positive pressure pipe 31 on the side to pump in air, and pump out the dusty air through the negative pressure pipe 32 on the other side; a U-shaped cavity is formed at the blasting location by the dust isolation plate 5, and positive pressure air is supplied and negative pressure air is exhausted at both ends of the U-shaped cavity, so that the dusty air in the U-shaped cavity can be quickly discharged, and the dusty air generated after the blasting can be quickly discharged;

[0067] S5. After the dust generated by the blasting at the face 11 is completely extracted, Figure 3 As shown, the two dust-shielding panels 5 are driven to move to both sides to leave a middle channel 21. During the movement of the two dust-shielding panels 5 to both sides, the upper suspension arm 52 needs to be appropriately lowered to adapt to the arc-shaped top of the tunnel 1, and enter the machinery and other equipment through the channel 21 to clean the soil pile produced by the blasting. At the same time, the positive pressure pipe 31 is closed to supply air, and the closed negative pressure pipe 32 is opened to extract air; when the soil pile is cleaned through the channel 21, the negative pressure pipes 32 on both sides are used for extraction. After the air in the tunnel 1 enters from the channel 21 and bypasses the front end of the dust-shielding panel 5, it moves to the side where the two dust-shielding panels 5 are away from each other, and is then extracted by the negative pressure pipes 32 on both sides, so that the dust will not pass through one side of the channel 21 and will not affect the workers.

[0068] S6. When cleaning the soil pile on the side, Figure 6 As shown, the negative pressure pipe 32 on this side is closed, the positive pressure pipe 31 pumps air, the negative pressure pipe 32 on the other side operates normally, and the positive pressure pipe 31 is closed; the air supply volume is smaller than the air exhaust volume, the dust bypasses the front end of the dust isolation plate 51 and is extracted from the negative pressure pipe 32 on the other side, which can avoid the dust from affecting the workers when cleaning the soil pile on the side;

[0069] S7. After all the soil piles are cleared, the subsequent construction work of this section of the face 11 is dusted and ventilated in the manner of steps S5-S6; for example, operations such as shotcrete, etc. At the same time, after the soil piles are cleared, the lower boom 53 can be controlled to rotate downward to a horizontal state, so that the dust isolation plate 3 is rectangular. When the internal dust is not large, the arch support 2 can be appropriately retreated to prevent the dust isolation plate 5 from affecting the face operation. When moving the arch support, the gas in the sealing air bag 26 needs to be released first to avoid friction with the tunnel and scratching the sealing air bag 26;

[0070] S8. When the next face 11 is under construction, steps S1-S7 are repeated.

[0071] In summary, the ventilation and dust removal device can be used to quickly clean the dust generated at the construction site of the tunnel face 11, greatly improving the dust removal efficiency and quality.

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust removal device for tunnel construction ventilation, arranged in a tunnel (1), for performing dust removal and ventilation during construction of a tunnel face (11), characterized in that: It comprises an arch support (2), the arch support (2) being arranged in the tunnel (1) so as to slide along the tunneling direction of the tunnel (1), a channel (21) being arranged in the arch support (2), and a plurality of air ducts (3) being arranged on both sides of the left and right sides of the channel (21); Two groups of dust-isolating members are symmetrically arranged on the arch support (2), and the dust-isolating members include dust-isolating seats (4) and dust-isolating plates (5). The two groups of dust-isolating seats (4) are located in the channel (21) and are slidably arranged on the arch support (2) in the left-right direction. One end of the dust-isolating plate (5) is connected to the dust-isolating seat (4), and the other end of the dust-isolating plate (5) extends toward the palm face (11). A guide rail (22) is horizontally arranged in the inner cavity of the arch support (2) along the left-right direction, and the upper end of the dust isolation seat (4) is slidably arranged on the guide rail (22); The guide rail (22) and the arched support (2) above it are sealed by a first partition plate (23); The arch support (2) further comprises a base (24), the base (24) being vertically arranged at the bottom of both left and right ends of the guide rail (22), and the two sides of the base (24) that are away from each other are sealed from the arch support (2) by a second partition plate (25); The channel (21) is surrounded by the guide rail (22) and the two bases (24); The plurality of air ducts (3) located on both sides are each provided with a corresponding second partition plate (25); The dust-proof plate (5) comprises a support arm (51), an upper suspension arm (52), a lower suspension arm (53), a push cylinder (54) and a plurality of first electric rolling curtains (55); the support arm (51) is vertically slidably arranged on a side of the dust-proof seat (4) close to the palm face (11); one end of the upper suspension arm (52) is connected to the upper end of the support arm (51); and the other end of the upper suspension arm (52) extends toward the palm face (11); The lower suspension arm (53) is arranged at intervals below the upper suspension arm (52), and one end of the lower suspension arm (53) is hinged to the dust isolation seat (4); the two ends of the push cylinder (54) are respectively hinged to the lower suspension arm (53) and the support arm (51); The upper suspension arm (52) is provided with a plurality of the first electric rolling curtains (55) in sequence, a slider (551) is provided at the free end of the first electric rolling curtain (55), the lower suspension arm (53) is provided with a plurality of slide grooves (531), and the plurality of sliders (551) are slidably disposed in the plurality of slide grooves (531), respectively.

2. A dust removal device for tunnel construction ventilation according to claim 1, characterized in that: A second electric rolling curtain (6) is arranged on the base (24), and a free end of the second electric rolling curtain (6) is connected to the dust isolation seat (4).

3. A dust removal device for tunnel construction ventilation according to claim 2, characterized in that: The first electric rolling curtain (55) and the second electric rolling curtain (6) have the same structure. The second electric rolling curtain (6) comprises a motor (61), a support (62), a roller (63) and a hard curtain plate (64). The support (62) and the motor (61) of the first electric rolling curtain (55) are both arranged on the upper suspension arm (52). The roller (63) is rotatably arranged on the support (62). The output end of the motor (61) is transmission-connected to the roller (63). One end of the hard curtain plate (64) is wound around the roller (63). The other end of the hard curtain plate (64) is provided with the slider (551).

4. A dust removal device for tunnel construction ventilation according to claim 1, characterized in that: A slide rail (41) and a plurality of guide rods (42) are vertically arranged on the dust isolation seat (4); a slide seat (43) is slidably arranged on the slide rail (41); and the slide seat (43) is slidably sleeved on the plurality of guide rods (42); The support arm (51) is arranged on the slide seat (43); It also includes a reducer (44), a lead screw (45) and a nut (46), wherein the lead screw (45) is rotatably disposed on the dust isolation seat (4), and the lead screw (45) is disposed in parallel with the plurality of guide rods (42); The nut (46) is fixed on the slide seat (43), and the nut (46) is sleeved on the lead screw (45) and is threadably matched with the lead screw (45); The reducer (44) is arranged on the dust isolation seat (4), and the output end of the reducer (44) is transmission-connected to the lead screw (45).

5. A dust removal device for tunnel construction ventilation according to claim 4, characterized in that: The dust-isolating member further comprises a scissor-type lift (7), the scissor-type lift (7) being arranged transversely on the base (24), and the telescopic end of the scissor-type lift (7) being connected to the dust-isolating seat (4).

6. A dust removal device for tunnel construction ventilation according to any one of claims 1 to 5, characterized in that: The air ducts (3) located on both sides each comprise a positive pressure pipe (31) and a negative pressure pipe (32); the positive pressure pipe (31) extends out of the tunnel (1) and is connected to an axial flow fan (33); the negative pressure pipe (32) extends out of the tunnel (1) and is connected to a dust collector (34).

7. A dust removal device for tunnel construction ventilation according to claim 6, characterized in that: A plurality of sealed air bags (26) are arranged between the arch support (2) and the tunnel (1), and the plurality of sealed air bags (26) are connected to an air pump (28) via an air pipe (27).

8. A dust removal method for tunnel construction ventilation, using a dust removal device for tunnel construction ventilation as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, when the tunnel face (11) is blasted, the two groups of dust isolation seats (4) are respectively driven to move to both ends of the guide rail (22) by the scissor-type lifts (7) on the dust isolation parts on both sides, and the negative pressure pipes (32) on both sides are started; S2. After the face (11) is blasted, the two dust shielding seats (4) are controlled to move toward each other and abut against each other, and at the same time, the height of the upper arm (52) is controlled according to the blasting height, and then the slope of the soil pile after the blasting is observed, and the elevation angle of the lower arm (53) is controlled by contracting the push cylinder (54) so ​​that the slope of the lower arm (53) is consistent with that of the soil pile, and the arch support (2) is driven to move toward one side of the face (11) until the lower arm (53) abuts against the soil pile, and at the same time, the upper arm (52) is raised so that the upper arm (52) abuts against the top of the blasting location, but the front end of the upper arm (52) does not abut against the face (11); S3, air is pumped into a plurality of sealing bags through an air pump (28), thereby sealing the gap between the arch support (2) and the tunnel (1), and at this time, the two dust isolation panels (5) and the blasting position of the tunnel (1) form a U-shaped space; S4, closing the negative pressure pipe (32) on one side and opening the positive pressure pipe (31) on the same side to pump air in, and pumping out dusty air through the negative pressure pipe (32) on the other side; S5, after the dust generated by the blasting on the tunnel face (11) is completely extracted, the two dust-isolating plates (5) are driven to move to both sides to leave a middle passage (21) for cleaning the soil pile generated by the blasting, and at the same time, the positive pressure pipe (31) is closed and the closed negative pressure pipe (32) is opened; S6. When cleaning the soil pile on the side, the negative pressure pipe (32) on that side is closed, the positive pressure pipe (31) pumps air, the negative pressure pipe (32) on the other side operates normally, and the positive pressure pipe (31) is closed; S7, after all soil piles are cleared, the subsequent construction work of this section of the tunnel face (11) is carried out by dust removal and ventilation in the manner of steps S5-S6; S8. When the next tunnel face (11) is being constructed, steps S1 to S7 are repeated.

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