Dust reduction and ventilation device for tunnel construction based on tunnel engineering

Abstract

The invention relates to the technical field of ventilation technology for tunnel engineering in-hole construction, and in particular to a dust reduction and ventilation device for tunnel engineering in-hole construction, comprising a movable adjustment component, an outer shell, a ventilation filter component and a water sprinkling and dust reduction component, wherein the upper end of the movable adjustment component is fixedly connected to the outer shell, and the inner part of the outer shell is provided with a ventilation filter component and a water sprinkling and dust reduction component, and the water sprinkling and dust reduction component is rotatably connected to the ventilation filter component, and the vertical height of the air suction port can be adjusted by the movable adjustment component, and the six groups of fan blades are driven to swing during the rotation of the support frame to fan the gas into the filter cartridge, so that all-round dust collection can be achieved and the dust collection range can be expanded without manual angle adjustment, which is convenient and efficient, and the gas flows out after the dust is filtered out by the filter cartridge, and atomization dust removal can be performed by the water sprinkling and dust reduction component, and the device has a simple structure and low energy consumption, and can effectively reduce dust and ventilate, thereby improving the air quality in the tunnel.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation for tunnel engineering in-hole construction, in particular to a dust reduction and ventilation device for tunnel engineering in-hole construction. Background Art

[0002] Dust reduction and ventilation in tunnel engineering is a complex and critical system engineering project, which aims to improve the working environment inside the mine and protect the life and health of the workers. A large amount of dust will be generated during the construction of the tunnel engineering. High dust concentration will harm the health of the workers. The ventilation system will malfunction after long-term operation. The ventilation system usually requires a lot of energy support, and high energy consumption does not meet the requirements of sustainable development.

[0003] At present, the Chinese invention with application number 202011404782.7 discloses a dust reduction and ventilation device for coal mining. Although the dust treatment mechanism is used to ventilate and reduce dust in local areas of the mine, and the dust is removed by the atomization principle, the dust is filtered at the same time through the internal filtering treatment structure. The ventilation device adopts a bee waist structured pressurized air intake mechanism, which can effectively carry out targeted dust reduction in local areas of the mine and improve the air quality of the working environment. However, it has a complex structure and high energy consumption, and cannot achieve all-round dust suction and adjust the vertical height of the air intake, which affects the dust reduction effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is that dust is easily generated during construction in tunnel engineering, and inhaling dust will endanger the health of workers. The existing dust reduction equipment has a complex structure, high energy consumption, cannot achieve all-round dust collection and adjust the vertical height of the air intake, and has low dust reduction efficiency.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A dust reduction and ventilation device for tunnel construction based on tunnel engineering, comprising a movable adjustment component, a shell, a ventilation filter component and a water sprinkling and dust reduction component, wherein the upper end of the movable adjustment component is fixedly connected to the shell, and the inside of the shell is provided with a ventilation filter component and a water sprinkling and dust reduction component, and the water sprinkling and dust reduction component is rotatably connected to the ventilation filter component;

[0006] The movable adjustment component comprises four sets of universal wheels, a base, four sets of telescopic cylinders and a support plate, one end of the telescopic cylinder is fixedly connected to the base, and the other end of the telescopic cylinder is fixedly connected to the support plate;

[0007] The ventilation and filtering component includes a motor, a worm, a turbine, a first rotating shaft, a fixed frame, a fan assembly, a filter cartridge and a ventilation pipe. The output shaft of the motor is rotationally connected to the worm, one end of the worm is rotationally connected to the fixed frame, the worm is meshed and connected to the turbine, the turbine is fixedly connected to the first rotating shaft, the first rotating shaft is rotationally connected to the fan assembly, the fan assembly is rotationally connected to the filter cartridge, and the filter cartridge is fixedly connected to the ventilation pipe.

[0008] As a preferred solution of the dust reduction and ventilation device for indoor construction based on tunnel engineering described in the present invention, the water sprinkling and dust reduction component includes a rocker, a pressing column, a pull ring slide, a piston, a water pump cylinder, two groups of water pump branches, a drainage pipe, an annular drainage branch, six nozzles and a water tank, the rocker is rotatably connected to the worm, the rocker is rotatably connected to the pull ring, the pull ring is fixedly connected to the pressing column, the pressing column is slidably connected to the slide, the slide is fixedly connected to the fixed frame, the pressing column is fixedly connected to the piston, the piston is slidably connected to the water pump cylinder, the two ends of the drainage pipe are respectively connected to the water pump branches, one group of water pump branches is connected to the drainage pipe, and the other group of water pump branches is connected to the water tank, the drainage pipe is connected to the annular drainage branch, the nozzles are distributed in a ring and are respectively rotatably connected to the annular drainage branch, and the water tank is fixedly connected to the outer shell.

[0009] As a preferred solution of the dust reduction and ventilation device for in-hole construction based on tunnel engineering described in the present invention, the water pump branch pipe is provided with a rotating part and a check valve, the check valve includes a valve, a spring and a rotating ring, the check valve is rotatably connected to the water pump branch pipe, one end of the valve is fixedly connected to the spring, the other end of the valve is fixedly connected to the rotating ring, the rotating ring is rotatably connected to the rotating part, the other end of the spring is fixedly connected to the water pump branch pipe, and the valve is used to block the water pump branch pipe.

[0010] As a preferred solution of the dust reduction and ventilation device for in-tunnel construction based on tunnel engineering described in the present invention, the fan assembly includes a second rotating column shaft, fan blades, and two groups of support frames. The fan blades are hinged with fixing parts, and the upper and lower ends of the fan blades are respectively rotatably connected to the support frames.

[0011] As a preferred solution of the dust reduction and ventilation device for in-hole construction based on tunnel engineering described in the present invention, it also includes a limiting column, the fan blades are hinged with fixing parts, and the fixing parts are rotatably connected to the support frame through the limiting column.

[0012] As a preferred solution of the dust reduction and ventilation device for in-hole construction based on tunnel engineering described in the present invention, the second rotating column shaft is provided with a connecting key, and the first rotating shaft is provided with a keyway.

[0013] As a preferred solution of the dust reduction and ventilation device for in-hole construction based on tunnel engineering described in the present invention, the support frame is provided with six connecting rods, and the connecting rods are provided with through holes.

[0014] As a preferred solution of the dust reduction and ventilation device for indoor construction based on tunnel engineering described in the present invention, a ventilation groove is provided at the lower end of the ventilation pipe, a bottle mouth is provided at the upper end of the ventilation pipe, the filter cartridge is fixedly connected to the embedding groove at the top of the ventilation pipe, and a ventilation cavity is provided between the ventilation pipe and the filter cartridge.

[0015] As a preferred solution of the dust reduction and ventilation device for in-hole construction based on tunnel engineering described in the present invention, the annular drainage branch pipe is provided with a plurality of screw holes, and the nozzle is provided with threads matching the annular drainage branch pipe.

[0016] As a preferred solution of the dust reduction and ventilation device for in-hole construction based on tunnel engineering described in the present invention, a sealing plate is provided at the lower end of the filter cartridge.

[0017] The beneficial effects of the present invention are as follows: the vertical height of the air suction port can be adjusted by moving the adjusting component. The six sets of fan blades are driven to swing during the rotation of the support frame to fan the gas into the filter cartridge, thereby realizing all-round dust suction and expanding the dust suction range. There is no need to adjust the angle manually, which is convenient and efficient. The gas flows out after the dust is filtered out by the filter cartridge. Atomization dust removal can be performed through the water sprinkling dust reduction component. The device has a simple structure and low energy consumption. It can effectively reduce dust and ventilate, thereby improving the air quality in the cave. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a dust reduction and ventilation device for tunnel construction based on a tunnel engineering in an embodiment of the present disclosure;

[0019] Figure 2 This is a schematic diagram of the structure of a water sprinkling and dust reduction component of a dust reduction and ventilation device for tunnel construction based on a tunnel engineering in an embodiment of the present disclosure;

[0020] Figure 3 This is a schematic diagram of the structure of an annular drainage branch pipe of a dust reduction and ventilation device for tunnel construction based on a tunnel engineering in an embodiment of the present disclosure;

[0021] Figure 4 This is a schematic diagram of the pump water cylinder structure of a dust reduction and ventilation device for tunnel construction based on tunnel engineering in an embodiment of the present disclosure;

[0022] Figure 5 This is a schematic diagram of the structure of a water stop valve of a dust reduction and ventilation device for in-hole construction based on a tunnel engineering in an embodiment of the present disclosure;

[0023] Figure 6 This is a schematic diagram of the structure of a fan assembly of a dust reduction and ventilation device for in-hole construction based on tunnel engineering in an embodiment of the present disclosure;

[0024] Figure 7This is a schematic diagram of the ventilation pipe structure of a dust reduction ventilation device for in-hole construction based on tunnel engineering in an embodiment of the present disclosure;

[0025] Figure 8 The water-sprinkling dust-reducing component of the dust-reducing ventilation device for tunnel construction in the disclosed embodiment is Figure 2 Enlarged view of point A in the middle;

[0026] Fig. 9 It is a schematic diagram of the second rotating column shaft structure of the dust reduction and ventilation device for tunnel construction based on tunnel engineering in the embodiment of the present disclosure;

[0027] Fig.10 It is a schematic diagram of the embedded groove structure of the dust reduction and ventilation device for in-hole construction based on tunnel engineering in the embodiment of the present disclosure.

[0028] Reference numerals: movable adjustment member 1; universal wheel 101; base 102; telescopic cylinder 103; support plate 104; housing 2; ventilation filter member 3; motor 31; worm 32; turbine 33; first rotating shaft 34; fixing frame 35; fan assembly 36; second rotating column shaft 361; connecting key 3611; keyway 3612; fan blade 362; fixing member 3621; supporting frame 363; connecting rod 3631; through hole 3632; limiting column 364; filter Cylinder 37; sealing plate 371; ventilation pipe 38; ventilation groove 381; bottle mouth 382; embedding groove 383; ventilation cavity 384; water sprinkling and dust reduction component 4; rocker 41; pressing column 42; pull ring 421; slide groove 43; piston 44; water pump cylinder 45; water pump branch pipe 46; rotating part 461; check valve 462; valve 4621; spring 4622; moving ring 4623, drain pipe 47; annular drain branch pipe 471; screw hole 472; nozzle 48; water tank 49. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Example

[0031] Reference Figure 1-Figure 10 This embodiment provides a dust reduction and ventilation device for tunnel construction, comprising a movable adjustment component 1, a shell 2, a ventilation filter component 3 and a watering and dust reduction component 4. The upper end of the movable adjustment component 1 is fixedly connected to the shell 2. The shell 2 is provided with a ventilation filter component 3 and a watering and dust reduction component 4. The watering and dust reduction component 4 is rotatably connected to the ventilation filter component 3.

[0032] The movable adjustment member 1 comprises four sets of universal wheels 101, a base 102, four sets of telescopic cylinders 103 and a support plate 104. One end of the telescopic cylinder 103 is fixedly connected to the base 102, and the other end of the telescopic cylinder 103 is fixedly connected to the support plate 104.

[0033] The ventilation and filtering component 3 includes a motor 31, a worm 32, a turbine 33, a first rotating shaft 34, a fixed frame 35, a fan assembly 36, a filter cartridge 37 and a ventilation pipe 38. The output shaft of the motor 31 is rotationally connected to the worm 32. One end of the worm 32 is rotationally connected to the fixed frame 35. The worm 32 is meshed and connected to the turbine 33. The turbine 33 is fixedly connected to the first rotating shaft 34. The first rotating shaft 34 is rotationally connected to the fan assembly 36. The fan assembly 36 is rotationally connected to the filter cartridge 37. The filter cartridge 37 is fixedly connected to the ventilation pipe 38.

[0034] Preferably, the universal wheel 101 is provided with a foot brake to facilitate moving and fixing the device. The telescopic cylinder 103 can adjust the height of the device, thereby adjusting the dust suction port to absorb dust more accurately and efficiently. The motor 31 drives the worm 32 to rotate, the worm 32 drives the turbine 33 to rotate, the turbine 33 drives the first rotating shaft 34 to rotate, the first rotating shaft 34 drives the fan assembly 36 to rotate, the fan assembly 36 rotates, driving the smoke and dust to flow into the ventilation pipe 38, and the gas flows out after filtering out the dust through the filter cartridge 37, thereby improving the air quality in the hole.

[0035] Reference Figure 2 and Figure 8 The water sprinkling and dust reduction component 4 includes a rocker 41, a pressing column 42, a pull ring 421, a slide 43, a piston 44, a water pump cylinder 45, two sets of water pump branches 46, a drainage pipe 47, an annular drainage branch 471, six nozzles 48 and a water tank 49. The rocker 41 is rotatably connected to the worm 32, the rocker 41 is rotatably connected to the pull ring 421, the pull ring 421 is fixedly connected to the pressing column 42, the pressing column 42 is slidably connected to the slide 43, and the slide 43 is fixed The fixed frame 35 is connected, the pressing column 42 is fixedly connected to the piston 45, the piston 45 is slidably connected to the water pump cylinder 45, and both ends of the drain pipe 47 are respectively connected to the water pump branch pipes 46, one group of water pump branch pipes 46 is connected to the drain pipe 47, and the other group of water pump branch pipes 46 is connected to the water tank 49. The drain pipe 47 is connected to the annular drain branch pipe 471, and the nozzles 48 are distributed in an annular shape and are rotatably connected to the annular drain branch pipes 471, and the water tank 49 is fixedly connected to the outer shell 2.

[0036] In this preferred embodiment, the turbine 33 drives the rocker 41 to rotate, the rocker 41 drives the pull ring 421 to do up and down reciprocating motion, the pull ring 421 drives the pressing column 42 to slide up and down in the slide groove 43, and the pressing column 42 can push and pull the piston 44 to slide up and down in the water pump cylinder 45, pull the piston 44 upward, the water pump branch 46 at the inlet enters water, the water pump branch 46 at the outlet is closed, push the piston 44 downward, water flows out from the outlet, the water pump branch 46 at the inlet is closed, the water flows through the drain pipe 47 into the narrow and long annular drain branch 471, the fluid velocity increases, the fluid flows from high pressure to low pressure, the nozzle 48 sprays water to form a spray, and the surrounding area is atomized to remove dust.

[0037] Reference Figure 4 and Figure 5 , characterized in that: the water pump branch pipe 46 is provided with a rotating part 461 and a check valve 462, the check valve 462 includes a valve 4621, a spring 4622 and a rotating ring 4623, the check valve 462 is rotatably connected to the water pump branch pipe 46, one end of the valve 4621 is fixedly connected to the spring 4622, and the other end of the valve 4621 is fixedly connected to the rotating ring 4623, the rotating ring 4623 is rotatably connected to the rotating part 461, and the other end of the spring 4622 is fixedly connected to the water pump branch pipe 46, and the valve 4621 is used to block the water pump branch pipe 46.

[0038] Preferably, the water pump cylinder 45 is provided with a check valve 462 at the inlet and the outlet. The check valve 462 allows water to flow in only one direction. When the piston 44 moves upward, a negative pressure is formed in the cavity inside the water pump cylinder 45. The check valve 462 on the inlet side opens, and the fluid enters through the inlet. When the piston 44 moves downward, the chamber pressure of the water pump cylinder 45 rises, and the check valve 462 on the inlet side is pressed, which pushes the fluid in the water pump cylinder 45 to be discharged from the outlet. The spring 4622 can drive the check valve 462 to reset.

[0039] Reference Figure 6 The fan assembly 36 includes a second rotating column shaft 361, a fan blade 362, and two sets of support frames 363. The fan blade 362 is hinged with a fixing member 3621, and the upper and lower ends of the fan blade 362 are rotatably connected to the support frame 363 respectively.

[0040] In the preferred embodiment of the present invention, the fan blades 362 can rotate around the second rotating column shaft 361, thereby increasing the air flow rate. During the rotation of the support frame 363, the six groups of fan blades 362 are driven to rotate, which can achieve all-round dust collection and expand the dust collection range without manual angle adjustment, which is convenient for colleges and universities.

[0041] Reference Figure 6 , and also includes a limiting column 364 , the fan blade 362 is hinged with a fixing member 3621 , and the fixing member 3621 is rotatably connected to the support frame 363 through the limiting column 364 .

[0042] In this embodiment, the fan blades 362 are preferably rotatable to blow external air into the interior of the device.

[0043] Reference Fig. 9 The second rotating column shaft 361 is provided with a connecting key 3611 , and the first rotating shaft 34 is provided with a keyway 3612 .

[0044] Preferably, in this embodiment, the first rotating shaft 34 can drive the second rotating column shaft 361 to rotate, thereby providing power for the fan blades 362 to swing.

[0045] Reference Figure 6 The support frame 363 is provided with six connecting rods 3631 , and the connecting rods 3631 are provided with through holes 3632 .

[0046] In this embodiment, the support frame 363 can drive the fan blades 362 to swing.

[0047] Reference Figure 7 and Fig.10 , characterized in that: a ventilation groove 381 is opened at the lower end of the ventilation pipe 38, a bottle mouth 382 is set at the upper end of the ventilation pipe 38, the filter cartridge 37 is fixedly connected to the embedded groove 383 at the top of the ventilation pipe 38, and a ventilation cavity 384 is set between the ventilation pipe 38 and the filter cartridge 37.

[0048] In this embodiment, the filter cartridge 37 can filter out dust in the air, thereby purifying the air and improving the air quality in the cave.

[0049] Reference Figure 3 The annular drainage branch pipe 471 is provided with a plurality of screw holes 472 , and the nozzle 48 is provided with threads matching the annular drainage branch pipe 471 .

[0050] This embodiment is preferred because the nozzle 48 can be easily replaced.

[0051] Reference Figure 7 A sealing plate 371 is provided at the lower end of the filter cartridge 37 .

[0052] In this embodiment, preferably, a sealing plate 371 is provided.

[0053] This prevents the air entering the filter cartridge from flowing back, thus ensuring the filtering effect.

[0054] Working principle: the universal wheel 101 is provided with a foot brake to facilitate moving and fixing the device. The telescopic cylinder 103 can adjust the height of the device, so that the dust suction port can be adjusted to absorb dust more accurately and efficiently. The motor 31 drives the worm 32 to rotate, the worm 32 drives the turbine 33 to rotate, the turbine 33 drives the first rotating shaft 34 to rotate, the first rotating shaft 34 drives the fan assembly 36 to rotate, and drives the smoke and dust to flow into the ventilation pipe 38. The fan blades 362 can rotate around the second rotating column shaft 361, so as to increase the air flow rate. During the rotation of the support frame 363, the six groups of fan blades 362 are driven to rotate, which can realize all-round dust suction and expand the dust suction range. There is no need to manually adjust the angle, which is convenient and efficient. The gas passes through the filter cartridge 37 to filter out the dust and then flows out, thereby improving the air quality in the hole. At the same time, the turbine 33 drives the rocker 41 to rotate, and the rocker 41 drives the pull ring 421 makes reciprocating motion up and down, and the pull ring 421 drives the pressing column 42 to slide up and down in the slide groove 43. The pressing column 42 can push and pull the piston 44 to slide up and down in the water pump cylinder 45, and pull the piston 44 upward. The water pump cylinder 45 is provided with a check valve 462 at the inlet and outlet. The check valve 462 allows water to flow in only one direction. When the piston 44 moves upward, a negative pressure is formed in the cavity inside the water pump cylinder 45, and the check valve 462 on the inlet side opens, and the fluid enters through the inlet. When the piston 44 moves downward, the chamber pressure of the water pump cylinder 45 rises, and the check valve 462 on the inlet side is pressed, which will push the fluid in the water pump cylinder 45 from the outlet into the drain pipe 47. The water flows through the drain pipe 47 into the narrow and long annular drain branch pipe 471, and the fluid velocity increases. The fluid flows from high pressure to low pressure, and the nozzle 48 sprays water to form a spray to atomize and remove dust from the surrounding area.

Claims

1. A dust reduction and ventilation device for tunnel construction based on tunnel engineering, characterized by: The invention comprises a movable adjustment component (1), an outer shell (2), a ventilation filter component (3) and a water sprinkling and dust reduction component (4); the upper end of the movable adjustment component (1) is fixedly connected to the outer shell (2); the ventilation filter component (3) and the water sprinkling and dust reduction component (4) are arranged inside the outer shell (2); the water sprinkling and dust reduction component (4) is rotatably connected to the ventilation filter component (3); The movable adjustment component (1) comprises four sets of universal wheels (101), a base (102), four sets of telescopic cylinders (103) and a support plate (104); one end of the telescopic cylinder (103) is fixedly connected to the base (102), and the other end of the telescopic cylinder (103) is fixedly connected to the support plate (104); The ventilation filter component (3) comprises a motor (31), a worm (32), a turbine (33), a first rotating shaft (34), a fixed frame (35), a fan assembly (36), a filter cartridge (37) and a ventilation pipe (38); the output shaft of the motor (31) is rotationally connected to the worm (32); one end of the worm (32) is rotationally connected to the fixed frame (35); the worm (32) is meshedly connected to the turbine (33); the turbine (33) is fixedly connected to the first rotating shaft (34); the first rotating shaft (34) is rotationally connected to the fan assembly (36); the fan assembly (36) is rotationally connected to the filter cartridge (37); and the filter cartridge (37) is fixedly connected to the ventilation pipe (38).

2. The dust reduction and ventilation device for tunnel construction according to claim 1, characterized in that: The water sprinkling and dust reduction component (4) comprises a rocker (41), a pressing column (42), a pull ring (421), a slide groove (43), a piston (44), a water pump cylinder (45), two groups of water pump branches (46), a drainage pipe (47), an annular drainage branch pipe (471), six nozzles (48) and a water tank (49), wherein the rocker (41) is rotatably connected to the worm gear (32), the rocker (41) is rotatably connected to the pull ring (421), the pull ring (421) is fixedly connected to the pressing column (42), the pressing column (42) is slidably connected to the slide groove (43), and the slide groove (4 3) fixedly connected to a fixed frame (35), the pressing column (42) is fixedly connected to a piston (45), the piston (45) is slidably connected to a water pump cylinder (45), both ends of the drainage pipe (47) are respectively connected to water pump branches (46), one group of water pump branches (46) is connected to the drainage pipe (47), and the other group of water pump branches (46) is connected to a water tank (49); the drainage pipe (47) is connected to an annular drainage branch pipe (471), the nozzles (48) are distributed in an annular shape and are rotatably connected to the annular drainage branch pipe (471), and the water tank (49) is fixedly connected to the housing (2).

3. The dust reduction and ventilation device for tunnel construction according to claim 2, characterized in that: The water pump branch pipe (46) is provided with a rotating member (461) and a check valve (462). The check valve (462) comprises a valve (4621), a spring (4622) and a rotating ring (4623). The check valve (462) is rotatably connected to the water pump branch pipe (46). One end of the valve (4621) is fixedly connected to the spring (4622). The other end of the valve (4621) is fixedly connected to the rotating ring (4623). The rotating ring (4623) is rotatably connected to the rotating member (461). The other end of the spring (4622) is fixedly connected to the water pump branch pipe (46). The valve (4621) is used to block the water pump branch pipe (46).

4. The dust reduction and ventilation device for tunnel construction based on a tunnel engineering as claimed in claim 1, characterized in that: The fan assembly (36) comprises a second rotating column shaft (361), a fan blade (362), and two groups of support frames (363); the fan blade (362) is hinged with a fixing member (3621); and the upper and lower ends of the fan blade (362) are rotatably connected to the support frame (363) respectively.

5. The dust reduction and ventilation device for tunnel construction according to claim 4, characterized in that: It also includes a limiting column (364), the fan blade (362) is hinged with a fixing member (3621), and the fixing member (3621) is rotatably connected to the support frame (363) through the limiting column (364).

6. The dust reduction and ventilation device for tunnel construction according to claim 4, characterized in that: The second rotating column shaft (361) is provided with a connecting key (3611), and the first rotating shaft (34) is provided with a keyway (3612).

7. The dust reduction and ventilation device for tunnel construction according to claim 4, characterized in that: The support frame (363) is provided with six connecting rods (3631), and the connecting rods (3631) are provided with through holes (3632).

8. The dust reduction and ventilation device for tunnel construction according to claim 1, characterized in that: A ventilation groove (381) is provided at the lower end of the ventilation pipe (38), a bottle mouth (382) is provided at the upper end of the ventilation pipe (38), the filter cartridge (37) is fixedly connected to the embedding groove (383) at the top of the ventilation pipe (38), and a ventilation cavity (384) is provided between the ventilation pipe (38) and the filter cartridge (37).

9. The dust reduction and ventilation device for tunnel construction according to claim 2, characterized in that: The annular drainage branch pipe (471) is provided with a plurality of screw holes (472), and the nozzle (48) is provided with threads matching the annular drainage branch pipe (471).

10. The dust reduction and ventilation device for tunnel construction according to claim 5, characterized in that: A sealing plate (371) is provided at the lower end of the filter cartridge (37).

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