Ventilation device for tunnel face

Abstract

A tunnel face ventilation device comprises an air outlet pipe, at least one air outlet branch pipe is arranged on the circumferential face of the air outlet pipe, the air outlet branch pipe is connected with lateral air outlet heads through air pipes, and the lateral air outlet heads are located on the two sides of the lower portion of the air outlet pipe. The air outlet branch pipe is arranged on the air outlet pipe, the lateral air outlet head is arranged on one side or two sides of the lower portion of the air outlet pipe, and the air outlet branch pipe is connected with the lateral air outlet head through the air pipe, so that air in the air outlet pipe is guided to the two sides of the lower portion of the tunnel, fresh air is provided for the bottom of the tunnel, and operators are prevented from inhaling harmful gas or are prevented from inhaling harmful gas.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction ventilation, in particular to a tunnel heading ventilation device. Background Technique

[0002] As a key working area in tunnel engineering, the ventilation effect of the tunnel heading directly affects the health of the staff and the safety of the working environment. However, there are many problems with traditional single ventilation openings. For example, a tunnel high-pressure construction ventilation system disclosed in CN218971242U is a ventilation scheme that is currently used more frequently. Its advantage is that the structure is simple, and its disadvantage is that the air outlet is located on the upper side of the tunnel. The air blown out from the air outlet blows to the heading. In this process, the air flows from top to bottom and then is discharged from the tunnel. And most of the operators are located on the ground of the tunnel, and there may be harmful gases during the operation at the tunnel heading. Therefore, when the air flows from top to bottom, it will blow the harmful gases to the ground, causing the operators to inhale the harmful gases. Content of the Utility Model

[0003] The purpose of the utility model is to provide a tunnel heading ventilation device. By arranging air outlet branches on the air outlet pipe and arranging lateral air outlet heads on one side or both sides below the air outlet pipe, the air outlet branches are connected with the lateral air outlet heads through air pipes, so as to lead the air in the air outlet pipe to both sides below the tunnel, provide fresh air for the bottom of the tunnel, and avoid or reduce the inhalation of harmful gases.

[0004] To achieve the above purpose, the utility model provides a tunnel heading ventilation device, which includes an air outlet pipe. At least one air outlet branch is arranged on the circumferential surface of the air outlet pipe. The air outlet branch is connected with a lateral air outlet head through an air pipe. The lateral air outlet head is located at both sides below the air outlet pipe.

[0005] It also includes a bracket. An installation groove is arranged at the top of the bracket. The air outlet pipe is fixedly installed in the installation groove. Traveling wheels are installed at the bottom of the bracket. The lateral air outlet heads are installed on one side or both sides inside the bracket.

[0006] A connecting rod is fixedly installed on the lateral air outlet head. The connecting rod is connected with the bracket through a bolt.

[0007] A plurality of bolt holes are longitudinally arranged on the bracket. The connecting rod is connected with the bolt holes at different heights through bolts, so that the lateral air outlet head is located at different heights.

[0008] An air door is installed at one end of the air outlet pipe where the air exits.

[0009] The lateral air outlet head includes a rectangular shell. At least one side of the shell is open horizontally to form an air outlet. A pipe joint is arranged at the top of the shell. The pipe joint is connected with the air pipe.

[0010] The utility model has the following technical effects compared with the prior art:

[0011] 1. The utility model is provided with air outlet branches on the air outlet pipe, and lateral air outlet heads are arranged on one side or both sides below the air outlet pipe. The air outlet branches are connected with the lateral air outlet heads through air pipes, so as to lead the air in the air outlet pipe to both sides below the tunnel, provide fresh air for the bottom of the tunnel, and enable the operators to avoid or reduce inhaling harmful gases.

[0012] 2. The utility model further includes a bracket. An installation groove is arranged at the top of the bracket, the air outlet pipe is fixedly installed in the installation groove, traveling wheels are installed at the bottom of the bracket, and the lateral air outlet heads are installed on one side or both sides inside the bracket. By arranging the bracket to fix the air outlet pipe and install the lateral air outlet heads, when driving the heading face, the bracket can be pushed to move forward along with the heading face.

[0013] 3. In order to facilitate the adjustment of the air volume of the upper air outlet pipe and the lower lateral air outlet heads, the utility model installs an air door at the air outlet end of the air outlet pipe. When the operators are working at the bottom of the tunnel, the air door can be adjusted to a smaller opening or closed. At this time, the air volume at the bottom of the tunnel is large, and the air in the tunnel flows upward from the bottom, avoiding the ground personnel from inhaling harmful gases; when working above the heading face, the air door can be opened, and the air will preferentially blow out from the air outlet pipe, making the air flow from top to bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0015] Figure 1 It is the front view structural schematic diagram of the utility model.

[0016] Figure 2 It is the right view structural schematic diagram of the utility model.

[0017] Figure 3 For Figure 1 the sectional structural schematic diagram of A - A in

[0018] Figure 4 It is the structural schematic diagram of the lateral air outlet head of the utility model.

[0019] Figure 5 It is the usage state diagram of the utility model.

[0020] In the figure:

[0021] Retractable air duct 1;

[0022] Air outlet pipe 10, air outlet branch 11, air door 12;

[0023] Lateral air outlet 20, housing 21, air outlet 22, pipe joint 23, connecting rod 24, bolt 25;

[0024] Air duct 30;

[0025] Bracket 40, installation groove 41, traveling wheel 42, bolt hole 43;

[0026] Tunnel 50. Detailed implementation manners

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0028] Please refer to Figures 1-5 , a tunnel face ventilation device, including an air outlet duct 10. Two air outlet branch pipes 11 are arranged on the circumferential surface of the air outlet duct 10. The air outlet branch pipes 11 are connected to the lateral air outlet 20 through an air duct 30. The lateral air outlet 20 is located on both sides below the air outlet duct 10. By arranging the air outlet branch pipes 11 on the air outlet duct 10 and arranging the lateral air outlet 20 on both sides below the air outlet duct, the air outlet branch pipes 11 are connected to the lateral air outlet 20 through the air duct 30, so as to lead the air in the air outlet duct 10 to both sides below the tunnel, providing fresh air for the bottom of the tunnel and enabling the operators to avoid or reduce inhaling harmful gases.

[0029] During use, the air outlet duct 10 is made of a metal pipe or a PVC pipe, and the air outlet duct 10 is connected to the telescopic air duct 1 of the original ventilation system through a hoop.

[0030] The air duct 30 can be made of a metal air duct or a telescopic air duct.

[0031] Furthermore, it further includes a bracket 40. An installation groove 41 is arranged at the top of the bracket. The air outlet duct 10 is fixedly installed in the installation groove 41. Traveling wheels 42 are installed at the bottom of the bracket 40. The lateral air outlet 20 is installed on one side or both sides inside the bracket 40. By arranging the bracket 40 to fix the air outlet duct 10 and install the lateral air outlet 20, when the face is tunneling, the bracket 40 can be pushed to move forward along with the face.

[0032] It should be noted that since the existing ventilation system installs slide rails or steel wires at the top of the tunnel, and the air duct of the ventilation system slides along the slide rails or steel wires, arranging the installation groove 41 at the top of the bracket 40 has two functions: one is to facilitate the installation of the air outlet duct 10, and the air outlet duct 10 can be welded or installed in the installation groove 41 through bolts; the other is to avoid the slide rails or steel wires installed at the top of the tunnel.

[0033] Specifically, the support 40 is made of steel structure and has an arched door opening shape adapted to the tunnel.

[0034] See Figure 3 , a connecting rod 24 is fixedly installed on the lateral air outlet 20, and the connecting rod 24 is connected to the support 40 through a bolt 25. The installation of the connecting rod 24 facilitates the installation of the lateral air outlet 20.

[0035] Furthermore, a plurality of bolt holes 43 are longitudinally provided on the support 40, and the connecting rod 24 is connected to the bolt holes 43 at different heights through bolts 25, so that the lateral air outlet 20 is located at different heights. With the above structure, the installation position of the lateral air outlet 20 can be adjusted as needed.

[0036] See Figure 1 , in order to facilitate the adjustment of the air volume of the upper air outlet pipe 10 and the lower lateral air outlet 20, a damper 12 is installed at the air outlet end of the air outlet pipe 10. When the operator is working at the bottom of the tunnel, the damper 12 can be adjusted to a smaller or closed state. At this time, the air volume at the bottom of the tunnel is large, and the air in the tunnel flows upward from the bottom, preventing ground personnel from inhaling harmful gases; when working above the heading face, the damper 12 can be opened, and the air will preferentially blow out from the air outlet pipe 10, making the air flow from top to bottom.

[0037] Preferably, in order to facilitate the adjustment of the damper 12, the damper 12 is an electric damper. Both ends of the damper 12 are connected to the air outlet pipe 10 through flanges.

[0038] In one embodiment, see Figure 4 , the lateral air outlet 20 includes a rectangular housing 21. At least one side of the housing 21 is open horizontally to form an air outlet 22, and a pipe joint 23 is provided at the top of the housing 21. The pipe joint 23 is connected to the air duct 30.

[0039] Of course, the lateral air outlet 20 can also adopt a 90° elbow structure.

[0040] The working principle or operation process of the present utility model is as follows:

[0041] See Figure 1 、 3 、5, an installation groove 41 is provided at the top of the support 40, the air outlet pipe 10 is fixedly installed in the installation groove 41, the air outlet pipe 10 is connected to the telescopic air duct 1 of the original ventilation system, traveling wheels 42 are installed at the bottom of the support 40, and lateral air outlets 20 are respectively installed on both sides below the interior of the support 40. The air outlet branch pipe 11 is connected to the lateral air outlet 20 through the air duct 30, so as to lead the air in the air outlet pipe 10 to both sides below the tunnel and provide fresh air for the bottom of the tunnel.

[0042] After installing the air damper 12 on the air outlet pipe 10, when the operator is working at the bottom of the tunnel, the air damper 12 can be adjusted down or closed to increase the air volume at the bottom of the tunnel, so that the air in the tunnel flows upward from the bottom, preventing ground personnel from inhaling harmful gases; when working above the heading face, the air damper 12 can be opened, and the air will preferentially blow out from the air outlet pipe 10, making the air flow from top to bottom.

Claims

1. A tunnel face ventilation device, characterized in that: It comprises an air outlet pipe (10), wherein at least one air outlet branch pipe (11) is arranged on the circumferential surface of the air outlet pipe (10), and the air outlet branch pipe (11) is connected to a lateral air outlet head (20) via an air duct (30), and the lateral air outlet heads (20) are located at both sides below the air outlet pipe (10).

2. The tunnel face ventilation device according to claim 1, characterized in that: It also comprises a bracket (40), the top of which is provided with a mounting groove (41), the air outlet pipe (10) is fixedly mounted in the mounting groove (41), the bottom of the bracket (40) is provided with walking wheels (42), and the side air outlet head (20) is mounted on one side or both sides of the inside of the bracket (40).

3. The tunnel face ventilation device according to claim 2, characterized in that: A connecting rod (24) is fixedly mounted on the lateral air outlet head (20), and the connecting rod (24) is connected to the bracket (40) via a bolt (25).

4. The tunnel face ventilation device according to claim 3, characterized in that: The bracket (40) is provided with a plurality of bolt holes (43) in the longitudinal direction, and the connecting rod (24) is connected to the bolt holes (43) at different heights via bolts (25), so that the lateral air outlet (20) is located at different heights.

5. The tunnel face ventilation device according to claim 1, characterized in that: An air door (12) is installed on the air outlet end of the air outlet pipe (10).

6. The tunnel face ventilation device according to any one of claims 1 to 3, characterized in that: The lateral air outlet (20) comprises a rectangular shell (21), wherein at least one side of the shell (21) is open laterally to form an air outlet (22), and a pipe joint (23) is provided on the top of the shell (21), and the pipe joint (23) is connected to the air duct (30).

Images