A pressurized ventilation system for tunnel pavement construction

Abstract

The present invention discloses a pressurized ventilation system for tunnel pavement construction in the field of tunnel ventilation technology, which includes a fan and a frame. The fan is arranged inside the frame; air ducts are provided at both the front and rear sides of the frame, and the air duct at the front side is attached to the air outlet of the fan; a docking mechanism is provided on the air duct, and the docking mechanism is used to quickly and stably dock the air duct with another air duct while facilitating disassembly; a moving mechanism is provided on the air duct, and the moving mechanism is used to drive the air duct to move forward when it is necessary to increase the ventilation distance; a driving mechanism is provided on the frame, and the driving mechanism is used to drive the moving mechanisms on all the mutually connected air ducts to operate synchronously after the new air duct is docked with the air duct in front of the fan; the device can quickly dock multiple air ducts and the docked air ducts are convenient to disassemble, which can effectively reduce the workload of the staff during the installation and disassembly of the air ducts.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel ventilation, and specifically to a tunnel pavement construction pressurized ventilation system. Background Art

[0002] When excavating a tunnel, the air in the deep part of the tunnel is not circulated, the oxygen is thin, and the accumulation of harmful substances and dust will seriously affect the health of construction workers. Therefore, during tunnel construction, a fan is usually set outside the tunnel, and then an air duct is extended into the tunnel construction position. Through the fan and the air duct, fresh air from the outside can be introduced into the tunnel construction position. After the air enters the tunnel, it will discharge the dust and other harmful air in the tunnel, so as to provide a better working environment for construction workers.

[0003] However, as the length of the tunnel increases, the length of the air duct also needs to be increased accordingly. The existing air ducts are usually connected by bolts. Since the diameter of the air duct is usually large, a large number of bolts are required. It is more complex to operate during docking and also troublesome to disassemble; in addition, when the existing air duct is extended, a new air duct is usually transported from outside the tunnel into the tunnel, and then the new air duct is docked with the air duct inside the tunnel to achieve the effect of extending the air duct; however, as the length of the tunnel increases, the transportation distance of the air duct will also increase, which is time-consuming and laborious to transport. Summary of the Invention

[0004] The purpose of the present invention is to provide a tunnel pavement construction pressurized ventilation system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A tunnel pavement construction pressurized ventilation system, including a fan and a frame, the fan is arranged inside the frame; air ducts are arranged on both the front and rear sides of the frame, and the air duct on the front side is attached to the air outlet of the fan;

[0006] A docking mechanism is arranged on the air duct, and the docking mechanism is used to quickly and stably dock the air duct with another air duct while facilitating disassembly;

[0007] An adding mechanism is arranged on the frame, and the adding mechanism is used to transport the air duct behind the fan to the position where it is docked with the air duct in front of the fan when the ventilation distance needs to be increased;

[0008] A moving mechanism is arranged on the air duct, and the moving mechanism is used to drive the air duct to move forward when the ventilation distance needs to be increased;

[0009] A driving mechanism is arranged on the frame, and the driving mechanism is used to drive the moving mechanisms on all interconnected air ducts to run synchronously after the new air duct is docked with the air duct in front of the fan.

[0010] Preferably, the docking mechanism includes a fixed sleeve which is sleeved on the surface of the air duct and fixedly connected to the air duct; a fixed ring is fixedly connected to the fixed sleeve, a rotating ring is rotatably connected to a position behind the fixed ring, and a plurality of fixed rods are fixedly connected to the rotating ring; a plurality of springs are arranged on the rotating ring, one end of each spring is fixedly connected to the rotating ring and the other end is fixedly connected to the fixed ring; a plurality of clamping blocks are fixedly connected to the front end position of the air duct, the number of the clamping blocks is the same as that of the fixed rods, and the plurality of clamping blocks are respectively located directly in front of the plurality of fixed rods.

[0011] Preferably, the plurality of fixed rods and the plurality of springs are both arranged in a circumferential array on the rotating ring; a lever is fixedly connected to a position between two adjacent springs on the rotating ring.

[0012] Preferably, the adding mechanism includes two first clamping plates which are located behind the fan and symmetrically distributed on the left and right sides of the middle part of the frame, and the first clamping plates are slidably connected to the frame; cylinders are symmetrically arranged at the upper left and right positions above the fan, the upper ends of the cylinders are fixedly connected to the frame and the bottom ends are fixedly connected to the fan; the fan is slidably connected to the frame and two connecting rods are symmetrically rotatably connected to the left and right ends of the fan, the rear end parts of the connecting rods are rotatably connected to a sliding frame, the sliding frame is slidably connected to the frame and the first clamping plates are located inside the sliding frame; second clamping plates are symmetrically fixedly connected to the front left and right positions of the frame.

[0013] Preferably, both the first clamping plates and the second clamping plates are driven by electricity, the first clamping plates are clamped and connected to the fixed sleeve on the air duct behind the fan, and the second clamping plates are clamped and connected to the fixed sleeve on the air duct in front of the fan.

[0014] Preferably, the moving mechanism includes a support frame which is located at the bottom of the fixed sleeve and fixedly connected to the fixed sleeve; a driving shaft is rotatably connected to the bottom of the support frame, and rollers are symmetrically fixedly connected to the left and right ends of the driving shaft; a worm is rotatably connected to the middle part of the support frame, a worm gear is meshed with the bottom of the worm, and the worm gear is fixedly connected to the driving shaft; a first docking shaft and a second docking shaft are respectively fixedly connected to the front and rear ends of the worm.

[0015] Preferably, the height of the support frame is adjustable; the front end of the first docking shaft is in the shape of a rectangular rod and the rear end of the second docking shaft is in the shape of a rectangular groove.

[0016] Preferably, the driving mechanism includes a fixing frame fixedly connected to the machine frame, and a first motor fixedly connected to the fixing frame. Symmetrically fixed to the left and right ends of the output shaft of the first motor are wire wheels around which a pulling rope is wound and fixedly connected to the wire wheels. At the bottom of the first motor is a lifting frame slidably connected to the machine frame at its left and right ends, and a telescopic rod is fixedly connected to the lifting frame. The telescopic end of the telescopic rod is fixedly connected to a fixing frame, and a second motor is fixedly connected inside the fixing frame. Fixed to the front end of the output shaft of the second motor is a third docking shaft. Symmetrically fixed to the left and right sides of the lifting frame are guide wheels. The bottom end of the pulling rope is fixedly connected to the fixing frame and the pulling rope is in contact with the guide wheels.

[0017] Preferably, the shape of the front part of the third docking shaft is the same as that of the first docking shaft; the telescopic rod is elastic.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the present invention, a new air duct is added to the docking position in front of the air duct of the fan through an adding mechanism, and then it is docked with the air duct in front of the fan through a docking mechanism. Then the driving mechanism is started, and the driving mechanism drives the moving mechanisms on all the air ducts to run synchronously. The multiple moving mechanisms will drive the multiple air ducts to move forward synchronously by a distance equal to the length of one air duct. At this time, the newly docked air duct is in front of the fan. By driving the fan to move downward, the air outlet of the fan will be docked with the newly docked air duct, and then the fan is started to ventilate the tunnel again; the device can quickly dock multiple air ducts and the docked air ducts are convenient to disassemble, which can effectively reduce the workload of the staff during the installation and disassembly of the air ducts.

[0020] In the present invention, the air ducts are docked outside the tunnel. Compared with the traditional method of docking air ducts inside the tunnel, the process of transporting the air ducts into the tunnel can be omitted, which can further reduce the workload of the staff. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the rear view structure of the present invention;

[0023] Figure 3 is a schematic diagram of the disassembled structure of the present invention;

[0024] Figure 4 is a schematic diagram of the structure of the air duct of the present invention;

[0025] Figure 5 is a schematic diagram of the second perspective structure of the air duct of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the frame in the present invention;

[0027] Figure 7 It is a schematic diagram of the disassembled structure of the frame in the present invention;

[0028] Figure 8 It is a schematic structural diagram of the driving mechanism in the present invention.

[0029] In the attached drawings: 1, air blower; 2, frame; 3, air duct; 4, fixing sleeve; 5, fixing ring; 6, rotating ring; 7, fixing rod; 8, spring; 9, clamping block; 10, lever; 11, first clamping plate; 12, air cylinder; 13, connecting rod; 14, sliding frame; 15, second clamping plate; 16, support frame; 17, driving shaft; 18, roller; 19, worm; 20, worm gear; 21, first docking shaft; 22, second docking shaft; 23, fixing frame; 24, first motor; 25, wire wheel; 26, pulling rope; 27, lifting frame; 28, telescopic rod; 29, fixing frame; 30, second motor; 31, third docking shaft; 32, guide wheel. Specific embodiments

[0030] Please refer to Figures 1 - 8 , the present invention provides a technical solution: a tunnel pavement construction pressurized ventilation system, including an air blower 1 and a frame 2, the air blower 1 is arranged inside the frame 2; air ducts 3 are arranged on both the front and rear sides of the frame 2, and the air duct 3 on the front side is in contact with the air outlet of the air blower 1;

[0031] The air duct 3 is provided with a docking mechanism, and the docking mechanism is used to quickly and stably dock the air duct 3 with another air duct 3 while facilitating disassembly;

[0032] The frame 2 is provided with an adding mechanism, and the adding mechanism is used to move the air duct 3 behind the air blower 1 to the position where it is docked with the air duct 3 in front of the air blower 1 when the ventilation distance needs to be increased;

[0033] The air duct 3 is provided with a moving mechanism, and the moving mechanism is used to drive the air duct 3 to move forward when the ventilation distance needs to be increased;

[0034] The frame 2 is provided with a driving mechanism, and the driving mechanism is used to drive the moving mechanisms on all interconnected air ducts 3 to run synchronously after the new air duct 3 is docked with the air duct 3 in front of the air blower 1;

[0035] During operation, after the tunnel construction reaches a certain depth, the frame 2 is fixed at the tunnel entrance. Then, a certain number of air ducts 3 are quickly connected through the docking mechanism. The air duct 3 at the rearmost part of this section is connected to the air outlet of the fan 1, and the remaining parts extend into the tunnel. At this time, the fan 1 is turned on. The fan 1 extracts the external air and transports it to the deep part of the tunnel through multiple air ducts 3. The increased air pressure in the deep part of the tunnel squeezes the air in the tunnel outwards, and the dust, harmful gases, and other fine particles in the tunnel will be discharged from the tunnel, thus providing a good working environment for the tunnel construction workers.

[0036] As the tunnel is under construction, the length of the tunnel will continue to increase. To ensure the ventilation effect of the tunnel, when the tunnel length increases, first stop the fan 1. Add a new air duct 3 to the docking position of the air duct 3 in front of the fan 1 through the adding mechanism, and then connect it to the air duct 3 in front of the fan 1 through the docking mechanism. Then start the driving mechanism, and the driving mechanism drives the moving mechanisms on all air ducts 3 to run synchronously. The multiple moving mechanisms will drive the multiple air ducts 3 to move forward synchronously by a distance equal to the length of one air duct 3. At this time, the newly connected air duct 3 is in front of the fan 1. By driving the fan 1 to move downward, the air outlet of the fan 1 will be connected to the newly connected air duct 3, and then start the fan 1 to ventilate the tunnel again. This device can quickly connect multiple air ducts 3 and the connected air ducts 3 are convenient to disassemble, which can effectively reduce the workload of the staff during the installation and disassembly of the air ducts 3. In addition, by connecting the air ducts 3 outside the tunnel, compared with the traditional method of connecting air ducts 3 inside the tunnel, the process of transporting the air ducts 3 into the tunnel can be omitted, which can further reduce the workload of the staff.

[0037] As Figures 4 - 5 shown, as a further solution of the present invention, the docking mechanism includes a fixed sleeve 4. The fixed sleeve 4 is sleeved on the surface of the air duct 3 and the fixed sleeve 4 is fixedly connected to the air duct 3. A fixed ring 5 is fixedly connected to the fixed sleeve 4. A rotating ring 6 is rotatably connected to the rear position of the fixed ring 5. Multiple fixing rods 7 are fixedly connected to the rotating ring 6. Multiple springs 8 are provided on the rotating ring 6. One end of the spring 8 is fixedly connected to the rotating ring 6 and the other end is fixedly connected to the fixed ring 5. Multiple clamping blocks 9 are fixedly connected to the front end position of the air duct 3. The number of clamping blocks 9 is the same as the number of fixing rods 7 and the multiple clamping blocks 9 are respectively located directly in front of the multiple fixing rods 7.

[0038] The multiple fixing rods 7 and the multiple springs 8 are both arranged in a circumferential array on the rotating ring 6. A lever 10 is fixedly connected to the rotating ring 6 at a position between two adjacent springs 8.

[0039] During operation, when the new air duct 3 is moved forward to dock with the rearmost air duct 3, as the new air duct 3 moves forward, multiple clamping blocks 9 on the new air duct 3 will fit with multiple fixing rods 7 on the rearmost air duct 3. As the new air duct 3 continues to move forward, the clamping blocks 9 will start to squeeze the fixing rods 7, and at this time, the multiple fixing rods 7 will drive the rotating ring 6 to start rotating on the fixed ring 5. When the new air duct 3 is tightly docked with the rearmost air duct 3, at this time, the clamping blocks 9 on the new air duct 3 cross over the fixing rods 7 on the rearmost air duct 3, and the rotating ring 6 automatically resets under the action of multiple springs 8. The rotating ring 6 drives the multiple fixing rods 7 to reset, and the multiple fixing rods 7 are engaged with the multiple clamping blocks 9. At this time, the new air duct 3 is stably docked with the rearmost air duct 3. When it is necessary to disassemble the air duct 3, the rotating ring 6 can be rotated in the reverse direction by pulling the lever 10. When the rotating ring 6 rotates, it will drive the multiple fixing rods 7 to rotate following the rotating ring 6. When the multiple fixing rods 7 rotate following the rotating ring 6, they will disengage from the clamping blocks 9, and at this time, the two stably docked air ducts 3 can be disassembled.

[0040] As Figures 6 - 7 shown, as a further solution of the present invention, the adding mechanism includes two first clamping plates 11. The two first clamping plates 11 are located at the rear position of the blower 1 and are symmetrically distributed on the left and right sides of the frame 2. The first clamping plates 11 are slidably connected to the frame 2. Symmetrically arranged on the upper left and right sides of the blower 1 are cylinders 12. The upper ends of the cylinders 12 are fixedly connected to the frame 2 and the bottom ends are fixedly connected to the blower 1. The blower 1 is slidably connected to the frame 2 and symmetrically rotatably connected to the left and right ends of the blower 1 are connecting rods 13. The rear end portions of the connecting rods 13 are rotatably connected to sliding frames 14. The sliding frames 14 are slidably connected to the frame 2 and the first clamping plates 11 are located inside the sliding frames 14. Symmetrically fixedly connected to the front left and right sides of the frame 2 are second clamping plates 15;

[0041] Both the first clamping plates 11 and the second clamping plates 15 are electrically driven. The first clamping plates 11 are clamped and connected to the fixing sleeves 4 on the air duct 3 behind the blower 1, and the second clamping plates 15 are clamped and connected to the fixing sleeves 4 on the air duct 3 in front of the blower 1;

[0042] During operation, the air duct 3 in front of the blower 1 can be firmly fixed by the two second clamping plates 15. When the blower 1 is in the position of docking with this air duct 3, air can be sent into this air duct 3. When it is necessary to add a new air duct 3, by starting the two cylinders 12 to drive the blower 1 to move upward, when the blower 1 moves upward, it will drive the two sliding frames 14 to move forward respectively through the two connecting rods 13. When the blower 1 moves upward to the upper position of the air duct 3, at this time, the inner wall of the rear side of the sliding frame 14 will fit with the first clamping plate 11. As the blower 1 continues to move upward, the sliding frame 14 will drive the first clamping plate 11 to move forward at this time. Since the two first clamping plates 11 clamp the new air duct 3, when the two first clamping plates 11 move forward, the new air duct 3 will also move forward and finally dock with the air duct 3 in front of the blower 1.

[0043] As shown Figures 4 - 5 in the figure, as a further solution of the present invention, the moving mechanism includes a support frame 16, the support frame 16 is located at the bottom of the fixed sleeve 4 and the support frame 16 is fixedly connected to the fixed sleeve 4; a drive shaft 17 is rotatably connected to the bottom of the support frame 16, and rollers 18 are symmetrically fixedly connected to the left and right ends of the drive shaft 17; a worm 19 is rotatably connected to the middle of the support frame 16, a worm gear 20 is engaged with the bottom of the worm 19, and the worm gear 20 is fixedly connected to the drive shaft 17; a first docking shaft 21 and a second docking shaft 22 are respectively fixedly connected to the front and rear ends of the worm 19;

[0044] The height of the support frame 16 is adjustable; the front end of the first docking shaft 21 is in the shape of a rectangular rod and the rear end of the second docking shaft 22 is in the shape of a rectangular groove;

[0045] During work, when the two air ducts 3 are docked, at this time, the first docking shaft 21 on the rear air duct 3 will be inserted into the second docking shaft 22 on the front air duct 3. After the first docking shaft 21 and the second docking shaft 22 are docked, only by driving the second docking shaft 22 on the rear air duct 3 can the worm 19 on the front and rear air ducts 3 be driven to rotate. When the worm 19 rotates, it drives the worm gear 20 to rotate. The worm gear 20 drives the two rollers 18 to rotate through the drive shaft 17. When the rollers 18 on the front and rear air ducts 3 rotate, the front and rear air ducts 3 will move forward or backward synchronously.

[0046] As shown in FIG. 8, as a further solution of the present invention, the driving mechanism includes a fixed frame 23, the fixed frame 23 is fixedly connected to the frame 2 and a first motor 24 is fixedly connected to the fixed frame 23. Wire wheels 25 are symmetrically fixedly connected to the left and right ends of the output shaft of the first motor 24. A pull rope 26 is wound around the wire wheel 25 and the pull rope 26 is fixedly connected to the wire wheel 25; a lifting frame 27 is provided at the bottom of the first motor 24. The left and right ends of the lifting frame 27 are slidably connected to the frame 2 and a telescopic rod 28 is fixedly connected to the lifting frame 27. A fixed frame 29 is fixedly connected to the telescopic end of the telescopic rod 28. A second motor 30 is fixedly connected to the fixed frame 29. A third docking shaft 31 is fixedly connected to the front end of the output shaft of the second motor 30; guide wheels 32 are symmetrically fixedly connected to the left and right sides of the lifting frame 27. The bottom end of the pull rope 26 is fixedly connected to the fixed frame 29 and the pull rope 26 is in contact with the guide wheel 32;

[0047] The shape of the front end part of the third docking shaft 31 is the same as that of the first docking shaft 21; the telescopic rod 28 has elasticity;

[0048] During operation, when the fan 1 moves to the uppermost position within the frame 2, the new air duct 3 behind the fan 1 will move forward to connect with the air duct 3 in front of the fan 1. At this time, release the two first clamping plates 11 and the two second clamping plates 15, and then start the first motor 24. The first motor 24 drives the wire wheels 25 on the left and right sides to rotate. When the wire wheels 25 rotate, the pull ropes 26 are released. At this time, the lifting frame 27 will drive the telescopic rod 28 and the second motor 30 to move downward; when the lifting frame 27 moves to the bottommost position, at this time, the third docking shaft 31 on the second motor 30 is at the same height as the second docking shaft 22; as the wire wheels 25 continue to rotate and release the pull ropes 26, under the elastic force of the telescopic rod 28, the second motor 30 will be pushed forward. When the second motor 30 drives the third docking shaft 31 to connect with the second docking shaft 22, start the second motor 30 at this time. The second motor 30 will drive the rearmost second docking shaft 22 to rotate through the third docking shaft 31; all the rollers 18 start to rotate and drive all the air ducts 3 to move forward synchronously. The second motor 30 will also move forward along with the air ducts 3 under the action of the telescopic rod 28; when the rearmost air duct 3 moves to the front of the fan 1, stop the second motor 30 at this time and drive the first motor 24 to run in reverse. The wire wheels 25 will start to retract the pull ropes 26, and the telescopic rod 28 starts to contract and starts to move upward after contracting to the minimum extent; at the same time, start the two second clamping plates 15 to clamp the air duct 3 that has moved to the front of the fan 1. After the air duct 3 that has moved to the front of the fan 1 is clamped, start the cylinder 12 to drive the fan 1 to move downward to reset. When the fan 1 moves to the bottommost position, it just fits with this air duct 3, and then the fan 1 can be started to continue ventilating the tunnel.

Claims

1. A tunnel pavement construction pressurized ventilation system, comprising a fan (1) and a frame (2), characterized in that: The blower (1) is arranged inside the frame (2); air ducts (3) are arranged on both the front and rear sides of the frame (2), and the air duct (3) at the front side is in contact with the air outlet of the blower (1). A docking mechanism is arranged on the air duct (3), and the docking mechanism is used to quickly and stably dock the air duct (3) with another air duct (3) while facilitating disassembly. An adding mechanism is arranged on the frame (2), and the adding mechanism is used to move the air duct (3) behind the blower (1) to the position where it is docked with the air duct (3) in front of the blower (1) when the ventilation distance needs to be increased. A moving mechanism is arranged on the air duct (3), and the moving mechanism is used to drive the air duct (3) to move forward when the ventilation distance needs to be increased. A driving mechanism is arranged on the frame (2), and the driving mechanism is used to drive the moving mechanisms on all the interconnected air ducts (3) to run synchronously after the new air duct (3) is docked with the air duct (3) in front of the blower (1). The docking mechanism includes a fixed sleeve (4), a fixed ring (5) is fixedly connected to the fixed sleeve (4), a rotating ring (6) is rotatably connected to the rear of the fixed ring (5), and a plurality of fixed rods (7) are fixedly connected to the rotating ring (6); a plurality of springs (8) are arranged on the rotating ring (6), one end of the spring (8) is fixedly connected to the rotating ring (6) and the other end is fixedly connected to the fixed ring (5); a plurality of clamping blocks (9) are fixedly connected to the front end of the air duct (3). A lever (10) is fixedly connected to the rotating ring (6) at a position between two adjacent springs (8). The adding mechanism includes two first clamping plates (11); the blower (1) is slidably connected to the frame (2), and connecting rods (13) are symmetrically and rotatably connected to the left and right ends of the blower (1), the rear end of the connecting rod (13) is rotatably connected to a sliding frame (14), the sliding frame (14) is slidably connected to the frame (2), and the first clamping plate (11) is arranged inside the sliding frame (14). The driving mechanism includes a fixed frame (23), the fixed frame (23) is fixedly connected to the frame (2), a first motor (24) is fixedly connected to the fixed frame (23), wire wheels (25) are symmetrically fixedly connected to the left and right ends of the output shaft of the first motor (24), a pull rope (26) is wound around the wire wheel (25) and the pull rope (26) is fixedly connected to the wire wheel (25); a lifting frame (27) is arranged at the bottom of the first motor (24), the left and right ends of the lifting frame (27) are slidably connected to the frame (2), a telescopic rod (28) is fixedly connected to the lifting frame (27), a fixed frame (29) is fixedly connected to the telescopic end of the telescopic rod (28), and a second motor (30) is fixedly connected inside the fixed frame (29), a third docking shaft (31) is fixedly connected to the front end of the output shaft of the second motor (30); guide wheels (32) are symmetrically fixedly connected to the left and right sides of the lifting frame (27), the bottom end of the pull rope (26) is fixedly connected to the fixed frame (29), and the pull rope (26) is in contact with the guide wheel (32).

2. The pressurized ventilation system for tunnel pavement construction according to claim 1, characterized in that: The fixed sleeve (4) is sleeved on the surface of the air duct (3) and the fixed sleeve (4) is fixedly connected to the air duct (3); the number of the clamping blocks (9) is the same as that of the fixed rods (7), and the multiple clamping blocks (9) are respectively located in the front positions of the multiple fixed rods (7).

3. The pressurized ventilation system for tunnel pavement construction according to claim 1, wherein: The multiple fixed rods (7) and the multiple springs (8) are both distributed in a circular array on the rotating ring (6).

4. The pressurized ventilation system for tunnel pavement construction according to claim 1, wherein: The two first clamping plates (11) are located at the rear position of the fan (1) and are symmetrically distributed on the left and right sides of the frame (2), and the first clamping plates (11) are slidably connected to the frame (2); on the upper left and right sides of the fan (1), cylinders (12) are symmetrically arranged, the upper ends of the cylinders (12) are fixedly connected to the frame (2), and the bottom ends are fixedly connected to the fan (1); on the front left and right sides of the frame (2), second clamping plates (15) are symmetrically and fixedly connected.

5. The pressurized ventilation system for tunnel pavement construction according to claim 4, wherein: The first clamping plates (11) and the second clamping plates (15) are both driven by electricity. The first clamping plates (11) are clamped and connected to the fixed sleeve (4) on the air duct (3) behind the fan (1), and the second clamping plates (15) are clamped and connected to the fixed sleeve (4) on the air duct (3) in front of the fan (1).

6. The pressurized ventilation system for tunnel pavement construction according to claim 1, characterized in that: The moving mechanism includes a support frame (16). The support frame (16) is located at the bottom of the fixed sleeve (4), and the support frame (16) is fixedly connected to the fixed sleeve (4); a drive shaft (17) is rotatably connected to the bottom of the support frame (16), and rollers (18) are symmetrically fixedly connected to the left and right ends of the drive shaft (17); a worm (19) is rotatably connected to the middle of the support frame (16), a worm gear (20) is engaged with the bottom of the worm (19), and the worm gear (20) is fixedly connected to the drive shaft (17); a first docking shaft (21) and a second docking shaft (22) are respectively fixedly connected to the front and rear ends of the worm (19).

7. The pressurized ventilation system for tunnel pavement construction according to claim 6, characterized in that: The height of the support frame (16) is adjustable; the front end of the first docking shaft (21) is in the shape of a rectangular rod, and the rear end of the second docking shaft (22) is in the shape of a rectangular groove.

8. The pressurized ventilation system for tunnel pavement construction according to claim 1, characterized in that: The shape of the front part of the third docking shaft (31) is the same as that of the first docking shaft (21); the telescopic rod (28) has elasticity.

Images