Anti-reflux device for air adjusting port of roadway air wall

Abstract

The utility model discloses an anti-reflux device for an air adjusting port of a roadway air wall, which comprises a frame mounted on the air adjusting port and embedded in the air wall, and an air baffle is mounted in the frame; a rotating shaft is vertically arranged on the wind shield, the top end and the bottom end of the rotating shaft protrude out of the wind shield and extend into the frame, and the rotating shaft is rotationally connected with the frame; the rotating shaft divides the wind shield into a main wind plate and an auxiliary wind plate, and the area of the main wind plate is larger than that of the auxiliary wind plate; a limiting mechanism is arranged on the frame and used for enabling the main air plate to be located in the inner side space of the air wall, and the inner side space is the space, away from a roadway outlet, of the air wall. The wind shield is installed on the air adjusting opening, the rotating shaft is vertically arranged on the wind shield, the wind shield is divided into the main wind plate and the auxiliary wind plate which are different in area size, meanwhile, the limiting mechanism is combined, so that the wind shield is opened during normal ventilation and automatically closed during explosion in a roadway, and automatic opening and closing of the air adjusting opening can be achieved. And tunnel ventilation safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel ventilation equipment, in particular to a backflow prevention device for an air regulating outlet of a tunnel wind wall. Background Art

[0002] A wind wall is a structure built into a tunnel to isolate hazards. It features dampers, wind tunnels, and air vents. Damper doors are openable and closeable, allowing access for construction equipment or workers. Wind tunnels allow ventilation ducts to pass through, and air vents are holes used to adjust ventilation in the tunnel. Different air vents have different sizes, allowing for adjustments to wind speed and, therefore, ventilation volume, within the tunnel.

[0003] Existing tuyere and air vents are usually equipped with a structure similar to a window sash to open or close the tuyere. However, when an explosion occurs in the tunnel, the above structure is difficult to automatically close, which greatly reduces the wind wall effect. Utility Model Content

[0004] The utility model aims to provide a backflow prevention device for an air regulating outlet of a tunnel wind wall, so as to realize automatic closure of the air regulating outlet of the wind wall in an emergency.

[0005] The utility model adopts the following technical solutions: a backflow prevention device for an air regulating outlet of a tunnel wind wall, comprising a frame installed on the air regulating outlet and embedded in the wind wall, with a wind shield installed in the frame;

[0006] A rotating shaft is vertically arranged on the windshield, the top and bottom ends of the rotating shaft both protrude from the windshield and extend into the frame, and the rotating shaft is rotatably connected to the frame;

[0007] The rotating shaft divides the windshield into a main wind plate and an auxiliary wind plate, and the area of ​​the main wind plate is larger than that of the auxiliary wind plate;

[0008] A limiting mechanism is provided on the frame, and the limiting mechanism is used to position the main wind plate in the inner space of the wind wall, where the inner space is the space where the wind wall is away from the tunnel exit.

[0009] Furthermore, the frame includes a top plate and a bottom plate that are arranged opposite to each other;

[0010] A left side plate and a right side plate are provided between the top plate and the bottom plate;

[0011] The left ends of the top plate and the bottom plate protrude from the left plate and are embedded in the wind wall;

[0012] The right ends of the top plate and the bottom plate protrude from the right side plate and are embedded in the wind wall.

[0013] Furthermore, mounting holes for accommodating the ends of the rotating shafts are provided on both the top plate and the bottom plate.

[0014] Furthermore, a bearing is installed in the mounting hole;

[0015] The ends of the rotating shaft are mounted in bearings.

[0016] Further, the limiting mechanism includes a left limiting plate installed on the right side of the left side plate;

[0017] The left limit plate is located on the rotation path of the main air plate and extends from the left plate to the right plate;

[0018] The top end of the left limiting plate is connected to the top plate, and the bottom end of the left limiting plate is connected to the bottom plate.

[0019] Furthermore, the limiting mechanism further includes a right limiting plate mounted on the right side plate;

[0020] The right limit plate is located on the rotation path of the auxiliary air plate, extending from the right plate to the left plate;

[0021] The top end of the right limiting plate is connected to the top plate, and the bottom end of the right limiting plate is connected to the bottom plate.

[0022] Furthermore, the left limiting plate and the right limiting plate are arranged alternately.

[0023] The beneficial effects of the present invention are as follows: the present invention installs a wind shield on the air regulating port, and vertically arranges a rotating shaft on the wind shield, and divides the wind shield into a main wind plate and an auxiliary wind plate of different sizes, and at the same time combines a limiting mechanism to open the wind shield during normal ventilation and automatically close the wind shield when an explosion occurs in the tunnel, thereby realizing automatic opening and closing of the air regulating port and improving tunnel ventilation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a backflow prevention device for an air regulating outlet of a tunnel wind wall according to an embodiment of the present utility model;

[0025] Figure 2 This is a state diagram of the anti-backflow device in the embodiment of the utility model when it is working normally;

[0026] Figure 3 This is a schematic diagram of the state of the backflow prevention device in the embodiment of the present utility model when the top plate is not installed;

[0027] Figure 4 This is a schematic structural diagram of a windshield in an embodiment of the present invention.

[0028] Among them: 10. Top plate; 20. Bottom plate; 30. Left side plate; 40. Right side plate; 50. Left limit plate; 60. Right limit plate; 70. Wind shield; 71. Main wind plate; 72. Auxiliary wind plate; 80. Rotating shaft. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0030] The utility model discloses a backflow prevention device for an air regulating outlet of a tunnel wind wall, such as Figure 1 and Figure 4 As shown, it includes a frame installed on the air regulating port and embedded in the wind wall, and a wind shield 70 is installed in the frame; a rotating shaft 80 is vertically provided on the wind shield 70, and the top and bottom ends of the rotating shaft 80 both protrude from the wind shield 70 and extend into the frame, and the rotating shaft 80 is rotatably connected to the frame; the rotating shaft 80 divides the wind shield 70 into a main wind plate 71 and an auxiliary wind plate 72, and the area of ​​the main wind plate 71 is larger than that of the auxiliary wind plate 72; a limiting mechanism is provided on the frame, and the limiting mechanism is used to make the main wind plate 71 located in the inner space of the wind wall, and the inner space is the space where the wind wall is away from the tunnel exit.

[0031] The utility model installs a wind shield on the air regulating port, vertically arranges a rotating shaft on the wind shield, and divides the wind shield into a main wind plate and an auxiliary wind plate of different sizes. At the same time, a limiting mechanism is combined to open the wind shield during normal ventilation and automatically close the wind shield when an explosion occurs in the tunnel. The air regulating port can be automatically opened and closed, thereby improving the ventilation safety of the tunnel.

[0032] As a specific implementation, the frame includes a top plate 10 and a bottom plate 20 arranged opposite each other; a left side plate 30 and a right side plate 40 are disposed between the top plate 10 and the bottom plate 20; the left ends of the top plate 10 and the bottom plate 20 protruding from the left side plate 30 are embedded in the wind wall; and the right ends of the top plate 10 and the bottom plate 20 protruding from the right side plate 40 are embedded in the wind wall. By embedding the frame in the wind wall, the frame's stability can be improved.

[0033] Specifically, both the top plate 10 and the bottom plate 20 are provided with mounting holes for accommodating the ends of the rotating shaft 80. The ends of the rotating shaft 80 are inserted into the mounting holes, and when the windshield 70 rotates, the rotating shaft 80 is driven by the windshield 70 to rotate in the mounting holes.

[0034] More specifically, a bearing is installed in the mounting hole; the end of the rotating shaft 80 is installed in the bearing. By arranging the bearing, the flexibility of the rotating shaft can be increased.

[0035] In this embodiment, the limiting mechanism includes a left limiting plate 50 mounted on the right side of the left side panel 30. The left limiting plate 50 is located in the rotation path of the main wind plate 71 and extends from the left side panel 30 toward the right side panel 40. The top end of the left limiting plate 50 is connected to the top panel 10, and the bottom end of the left limiting plate 50 is connected to the bottom panel 20. The provision of the left limiting plate 50 ensures that the wind deflector 70 rotates in one direction while preventing it from rotating in the other direction.

[0036] More specifically, the limiting mechanism also includes a right limiting plate 60 mounted on the right side plate 40. The right limiting plate 60 is located in the rotation path of the auxiliary air plate 72 and extends from the right side plate 40 toward the left side plate 30. The top end of the right limiting plate 60 is connected to the top plate 10, and the bottom end of the right limiting plate 60 is connected to the bottom plate 20. The right limiting plate 60 combined with the left limiting plate 50 can enhance the limiting effect.

[0037] In this embodiment, the left limiting plate 50 and the right limiting plate 60 are staggered in the direction of the tunnel cross section, so that they act on different sides of the wind shield respectively.

[0038] In addition to the left and right limit plates 50 and 60 described above, limit posts can be added to the top and bottom plates 10 and 20 to prevent the windshield 70 from rotating too far. For example, an upward protrusion can be provided on the bottom plate next to the rotating shaft, with the axis of the protrusion and the axis of the rotating shaft coplanar, with the plane perpendicular to the cross-section of the tunnel.

[0039] The working process of the utility model solution is:

[0040] When the ventilation is normal, such as Figure 2 and Figure 3 As shown, since the main wind plate 71 has a larger force-bearing area, it is subjected to greater force, and the main wind plate 71 of the wind shield 70 rotates toward the working surface, and fresh air from the outside flows toward the working surface.

[0041] When an explosion occurs on the working face, the wind shield 70 on one side of the working face will be impacted by the explosion airflow. Since the main wind plate 71 has a large area, the force it bears will be greater than the force on the auxiliary wind plate 72, so the main wind plate 71 will rotate toward the tunnel exit. However, when it rotates to a certain extent, the main wind plate 71 will be blocked by the left limit plate 50, and the auxiliary wind plate 72 will be blocked by the right limit plate 60. Therefore, under the action of the explosion wind pressure, the wind shield 70 will cover the air regulating port and maintain this state to prevent gas from gushing out through the air regulating port.

Claims

1. A backflow prevention device for a tunnel wind wall air regulating outlet, characterized in that: It comprises a frame installed on the air regulating port and embedded in the wind wall, wherein a wind shield (70) is installed in the frame; A rotating shaft (80) is vertically provided on the windshield (70), the top and bottom ends of the rotating shaft (80) both protrude from the windshield (70) and extend into the frame, and the rotating shaft (80) is rotatably connected to the frame; The rotating shaft (80) divides the wind shield (70) into a main wind plate (71) and a secondary wind plate (72), and the area of ​​the main wind plate (71) is larger than the area of ​​the secondary wind plate (72); A limiting mechanism is provided on the frame, and the limiting mechanism is used to position the main wind plate (71) in the inner space of the wind wall, and the inner space is the space of the wind wall away from the tunnel exit.

2. The backflow prevention device for the air regulating outlet of the tunnel wind wall according to claim 1, characterized in that: The frame includes a top plate (10) and a bottom plate (20) that are arranged opposite to each other; A left side plate (30) and a right side plate (40) are provided between the top plate (10) and the bottom plate (20); The left ends of the top plate (10) and the bottom plate (20) protrude beyond the left side plate (30) and are embedded in the wind wall; The right ends of the top plate (10) and the bottom plate (20) protrude beyond the right side plate (40) and are embedded in the wind wall.

3. The backflow prevention device for the air regulating outlet of the tunnel wind wall according to claim 2, characterized in that: The top plate (10) and the bottom plate (20) are both provided with mounting holes for accommodating the end of the rotating shaft (80).

4. The backflow prevention device for the air regulating outlet of the tunnel wind wall according to claim 3, characterized in that: A bearing is installed in the mounting hole; The end of the rotating shaft (80) is mounted in the bearing.

5. The backflow prevention device for the air regulating outlet of a tunnel wind wall according to any one of claims 2 to 4, characterized in that: The limiting mechanism comprises a left limiting plate (50) mounted on the right side of the left side plate (30); The left limit plate (50) is located on the rotation path of the main air plate (71) and extends from the left side plate (30) toward the right side plate (40); The top end of the left limiting plate (50) is connected to the top plate (10), and the bottom end of the left limiting plate (50) is connected to the bottom plate (20).

6. The backflow prevention device for the air regulating outlet of the tunnel wind wall according to claim 5, characterized in that: The limiting mechanism further includes a right limiting plate (60) mounted on the right side plate (40); The right limit plate (60) is located on the rotation path of the auxiliary air plate (72), extending from the right side plate (40) toward the left side plate (30); The top end of the right limiting plate (60) is connected to the top plate (10), and the bottom end of the right limiting plate (60) is connected to the bottom plate (20).

7. The backflow prevention device for the air regulating outlet of the tunnel wind wall according to claim 6, characterized in that: The left limiting plate (50) and the right limiting plate (60) are arranged alternately.

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