Tunnel exhaust device and working method

Abstract

The invention discloses a tunnel exhaust device which comprises a first partition unit horizontally moving in a tunnel, the first partition unit comprises a door-type frame body, the door-type frame body is in an n shape, the interior of a frame body of the door-type frame body is used for allowing vehicles to pass through, and the outer side of the frame body is in airtight connection with the inner wall of the tunnel; two supporting columns of the portal frame body are provided with driving devices which walk on the bottom surface of the tunnel; the high-pressure air curtain machine is arranged on the gate-type frame body, air outlets of a plurality of vertical grooves are formed in the position, facing the center line of the tunnel, of the high-pressure air curtain machine, and air curtains sprayed out of the air outlets cut off air exchange on the two sides of the plane where the gate-type frame body is located. Gas in a dirty gas area can be directionally pushed to the nearest effective exhaust area in the tunnel, and the problem that pollutants in the middle of the long tunnel are gathered is solved.

Claims

1. A tunnel exhaust device, characterized in that: Comprising: A first partition unit (2) that translates within the tunnel (1), the first partition unit (2) includes a portal frame body (3), the portal frame body (3) is in a "冂" shape, the inside of its frame is for vehicles to pass through, the outside of the frame is airtightly connected to the inner wall of the tunnel (1), and traveling devices (5) that walk on the bottom surface of the tunnel (1) are provided on the two columns of the portal frame body (3); A high-pressure air curtain machine (4) that is provided on the portal frame body (3), the high-pressure air curtain machine (4) is provided with an air outlet (40) with multiple vertical grooves facing the midline of the tunnel (1), wherein the air curtain ejected from the air outlet (40) cuts off the gas exchange on both sides of the plane where the portal frame body (3) is located.

2. The tunnel exhaust device according to claim 1, characterized in that: The first partition unit (2) includes two portal frame bodies (3) arranged at intervals, two columns on the same side of the two portal frame bodies (3) are jointly connected with one traveling device (5), the first partition unit (2) includes two opposite high-pressure air curtain machines (4), the two high-pressure air curtain machines (4) are respectively fixed between the columns on each side of the two portal frame bodies (3) and are airtightly connected to the portal frame bodies (3) on both sides, and the beam bodies between the two portal frame bodies (3) are airtightly connected.

3. The tunnel exhaust device according to claim 2, characterized in that: The two high-pressure air curtain machines (4) are symmetrically arranged, and the two air outlets (40) symmetrically eject an air curtain with a jet angle in front of the moving direction of the first partition unit (2).

4. The tunnel exhaust device according to claim 2, characterized in that: A plurality of air baffle plates (7) are rotatably connected to the portal frame body (3), the air baffle plates (7) match the space between the portal frame body (3) and the inner wall of the tunnel (1), wherein when the air baffle plates (7) are rotated and propped up, the space between the portal frame body (3) and the inner wall of the tunnel (1) can be sealed.

5. The tunnel exhaust device according to claim 4, characterized in that: A semi-circular inflatable arch (6) is further provided outside the portal frame body (3), the inflatable arch (6) is an airtight capsule that can be inflated and expanded, its outer wall is fixedly connected to the portal frame body (3), the inflatable arch (6) includes at least one inflatable port (60) that can continuously inflate inward, wherein when the air baffle plates (7) are propped up and continuously inflated into the inflatable port (60), the inflatable arch (6) expands to form a semi-circular air arch, its outer wall touches the inner wall of the tunnel (1), and the inflatable arch (6) seals the交接 position between the air baffle plates (7) and the tunnel (1).

6. The tunnel exhaust device according to claim 4, characterized in that: It further includes a second partition unit (21) arranged at intervals behind the first partition unit (2), the second partition unit (21) includes a portal frame body (3), a traveling device (5) and air baffle plates (7) of the same size as the first partition unit (21), the second partition unit (21) further includes a second air curtain machine (9) for ejecting an air curtain to cut off the gas exchange on both sides, wherein the tunnel (1) is divided into a dirty gas area (11), a transition area (12), and a clean gas area (13) that are airtightly isolated from each other from front to back by the first partition unit (2) and the second partition unit (21).

7. The tunnel exhaust device according to claim 6, characterized in that: It also comprises an air supply duct (8), the openings at both ends of the air supply duct (8) respectively connecting the clean air zone (13) and the dirty air zone (11), an air supply fan (81) is provided in the air supply duct (8) to discharge the air in the clean air zone (13) into the dirty air zone (11), and the outer wall of the air supply duct (8) is matched and connected with the air partition plate (7).

8. The tunnel exhaust device according to claim 6, characterized in that: Two tracks (50) are arranged along the entire length of both sides of the bottom surface of the tunnel (1), and the travel device (5) is a track trolley that matches and travels on the tracks (50).

9. The tunnel exhaust device according to claim 1, characterized in that: It also includes a closed-loop control system, which is connected to the driving device (5) and the high-pressure air curtain machine (4) by signal, and the closed-loop control system calculates the spray air curtain isolation efficiency T of the high-pressure air curtain machine (4) in real time, and adjusts the travel speed of the driving device (5) according to the calculated value of T; T= ； Wherein, V0 is the air curtain spraying speed, L0 is the total height of the air outlet, b0 is the total width of the air outlet, V is the moving speed of the traveling device, S is the tunnel cross-sectional area, b is the distance between the portal frame columns, L is the distance between the portal frame cross beam and the ground, and α is the spraying angle; if T<1, the traveling device (5) reduces the moving speed V until T≥1, and if T≥1, the traveling device (5) maintains or increases the moving speed V.

10. A working method of a tunnel exhaust device, applied to the tunnel exhaust device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Gas composition monitoring equipment is installed at intervals in the tunnel (1) to detect and feedback the gas composition of each monitoring point in real time, and to monitor the range of the polluted gas section; S2. Move the tunnel exhaust device in front of the polluted air section so that the polluted air section is located between the nearest effective exhaust area in the tunnel and the tunnel exhaust device; S3, turning on the high-pressure air curtain machine (4), and at the same time closing the space between the outside of the portal frame (3) and the tunnel (1), so that the tunnel exhaust device runs and pushes the air mass in the polluted air section to the effective exhaust area.

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