Wind pressure relay device for cleaning and ventilation of long tunnel construction

Abstract

The utility model discloses a wind pressure relay device for cleaning and ventilation of long tunnel construction, and belongs to the technical field of tunnel ventilation. A wind pressure relay device for cleaning and ventilation in long tunnel construction comprises a frame body and a relay axial flow fan, the frame body is wrapped with windproof cloth, the wind pressure relay device further comprises an air inlet, a wind pressure sensor, a wind pressure sensor, a wind pressure sensor and a wind pressure sensor, the air inlet is formed in one side of the windproof cloth and connected with the relay axial flow fan, and the wind pressure sensor is connected with the wind pressure sensor. Air outlets are formed in the side, away from the air inlet, of the windproof cloth, and the air outlets are formed in the upper side and the lower side of the partition plate; fresh air is introduced into the air inlet bin from the air inlet by starting the relay axial flow fan, certain air pressure is formed in the frame body and the windproof cloth, the air outlet bin is divided into two air outlets for air outlet by upper and lower layers, interference of respective air outlet is avoided, the stability of air flow is guaranteed, and the construction environment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tunnel ventilation technology, and in particular to a wind pressure relay device for clean ventilation in long tunnel construction. Background Technology

[0002] In modern tunnel construction, the working environment is often crucial to project quality, safety, efficiency, and the physical and mental health of workers. Tunnel ventilation provides fresh air for construction machinery and personnel inside the tunnel, while diluting and removing various toxic and harmful gases and dust, thereby creating a good working environment, improving construction conditions, and ensuring the health and safety of construction workers.

[0003] In recent years, many long tunnels have been built both domestically and internationally, with many exceeding 10km in length. From the perspective of construction ventilation, most of the long tunnels built abroad in recent years have adopted large-diameter and high-power duct forced ventilation. This is because the manufacturing industry abroad is more developed, and the ventilation ducts they produce have very low air leakage, about 20% to 50% of the leakage rate of domestic ducts. Therefore, their ventilation systems are highly adaptable to solving long-distance construction ventilation. Forced ventilation is basically not limited by construction conditions and is currently the most widely used ventilation method. The longest air supply distance should be determined based on the performance and matching of the selected equipment.

[0004] Domestically produced fans and ducts are of relatively poor quality and performance, and their air delivery distance is also much shorter. For some single-heading tunnels with long forced-inlet distances, they not only face the problem of insufficient air pressure at the forced-inlet ventilation outlets, but also frequently experience a mixture of fresh and polluted air inside the tunnel, resulting in poor airflow stability and difficulty in ensuring the construction environment. Utility Model Content

[0005] The purpose of this invention is to solve the problem of insufficient air pressure at the forced ventilation outlet, the frequent mixing of fresh and polluted air in the tunnel, poor airflow stability, and difficulty in ensuring the construction environment. Therefore, this invention proposes an air pressure relay device for clean ventilation in long tunnel construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A wind pressure relay device for clean ventilation in long tunnel construction includes a frame and a relay axial flow fan. The frame is covered with a windproof cloth and includes: an air inlet on one side of the windproof cloth, wherein the air inlet is connected to the relay axial flow fan; and a partition fixedly connected to the frame, wherein an exhaust port is provided on the side of the windproof cloth away from the air inlet, and the exhaust port is located on the upper and lower sides of the partition.

[0008] In order to connect the relay axial flow fan, preferably, a connecting air belt is fixedly installed at the air inlet, and the connecting air belt is connected to the output end of the relay axial flow fan.

[0009] To avoid interference from the exhaust air, preferably, there are two exhaust vents that are equidistant from the partition.

[0010] For connecting to the external air duct, preferably, a zipper is provided at the exhaust port.

[0011] To separate the air outlet chamber, preferably, the windproof cloth contains an air inlet chamber and an air outlet chamber, and the partition is located inside the air outlet chamber and in the middle of the air outlet chamber.

[0012] Compared with the prior art, this utility model provides a wind pressure relay device for clean ventilation in long tunnel construction, which has the following beneficial effects:

[0013] 1. This air pressure relay device for clean ventilation in long tunnel construction introduces fresh air into the air inlet chamber by activating the relay axial flow fan. A certain air pressure is formed within the frame and windproof cloth. The air outlet chamber is divided into two layers, upper and lower, to avoid interference between the air outlets and ensure the stability of the airflow. This solves the problem of insufficient air pressure at the conventional forced ventilation outlet in long tunnels. It also solves the problem of fresh air and polluted air mixing caused by various reasons during the ventilation of long tunnels, ensuring that the air outlet is always filled with fresh air and protecting the construction environment. Attached Figure Description

[0014] Figure 1 A schematic diagram of the isometric structure of a wind pressure relay device for clean ventilation in long tunnel construction proposed in this utility model. Figure 1 ;

[0015] Figure 2 A schematic diagram of the isometric structure of a wind pressure relay device for clean ventilation in long tunnel construction proposed in this utility model. Figure 2 ;

[0016] Figure 3 This is a cross-sectional view of the windproof cloth structure of a wind pressure relay device for cleaning and ventilation in long tunnel construction proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the frame structure of a wind pressure relay device for cleaning and ventilation in long tunnel construction proposed in this utility model.

[0018] In the diagram: 1. Frame; 2. Windproof cloth; 3. Relay axial flow fan; 4. Air inlet; 5. Partition; 6. Air outlet; 7. Connecting air belt; 8. Zipper; 9. Air inlet chamber; 10. Air outlet chamber. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Example:

[0022] Reference Figures 1-4 This utility model embodiment provides a wind pressure relay device for clean ventilation in long tunnel construction, including a frame 1 and a relay axial flow fan 3 for extracting fresh air. The relay axial flow fan 3 has a maximum power of 200kW. The frame 1 is a rectangular steel structure built with 5cm angle steel, with a length of 4m-6m, preferably 5m, a width of 2.2m-3.4m, preferably 2.8m, and a height of 2.5m-3.5m, preferably 3m. The frame 1 is covered with a windproof cloth 2, which is a thickened canvas to ensure no air leakage. It also includes an air inlet 4, which is located in the middle of one side of the windproof cloth 2. Air outlet 4 is connected to relay axial flow fan 3; partition 5 is fixedly connected to frame 1 and is horizontally set. There is an exhaust port 6 on the side of the windproof cloth 2 away from the air inlet 4. There are two exhaust ports 6 and they are equidistant from the partition 5. There is an air inlet chamber 9 and an air outlet chamber 10 inside the windproof cloth 2. The partition 5 is set in the air outlet chamber 10 and is located in the middle of the air outlet chamber 10. Three sides of the partition 5 are attached to the windproof cloth 2 and the other side is close to the air inlet chamber 9. The relay axial flow fan 3 is used to relay the air pressure of the air inlet of the hole to ensure the subsequent air pressure of the split flow. Multiple exhaust ports 6 can be set according to the usage scenario to meet the ventilation needs of on-site construction.

[0023] During operation, fresh air is introduced into the air intake chamber 9 from the air inlet 4 by starting the relay axial flow fan 3. A certain air pressure is formed in the frame 1 and the windproof cloth 2. The air outlet chamber 10 is divided into two exhaust ports 6 with upper and lower layers to avoid interference between the air outlets and ensure the stability of the airflow. This solves the problem of insufficient air pressure at the conventional forced ventilation outlet in long tunnels. It can also solve the problem of fresh air and polluted air mixing caused by various reasons during the ventilation of long tunnels, ensuring that the air outlet is always filled with fresh air and guaranteeing the construction environment.

[0024] A connecting air belt 7 is fixedly installed at the air inlet 4. The connecting air belt 7 has a reserved length of 0.8m-1.2m, preferably 1m. The connecting air belt 7 is connected to the output end of the relay axial flow fan 3. A zipper 8 is provided at the air outlet 6. The zipper 8 can be directly installed with the air belt.

[0025] During operation, the fresh air from outside the tunnel is delivered to the frame 1 and the windproof cloth 2 by the relay axial flow fan 3 at the tunnel entrance, and the air force is distributed. The ventilation air is then transported to the working face through the ventilation belt connected by the zipper 8. Finally, the exhaust air is discharged outside the tunnel by the guide fan.

[0026] This air pressure relay device, used for cleaning and ventilation in long tunnel construction, introduces fresh air into the air intake chamber 9 through the air inlet 4 by starting the relay axial flow fan 3. A certain air pressure is formed in the frame 1 and the windproof cloth 2. The air outlet chamber 10 is divided into two exhaust ports 6 with upper and lower layers to avoid interference between the air outlets and ensure the stability of the airflow. The air is then transported to the construction face through the ventilation belt connected by the zipper 8. Finally, the exhaust sludge is discharged outside the tunnel through the guide fan.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wind pressure relay device for clean ventilation in long tunnel construction, comprising a frame (1) and a relay axial flow fan (3), wherein the frame (1) is externally wrapped with a windproof cloth (2), characterized in that, Also includes: An air inlet (4) is located on one side of the windproof cloth (2). The air inlet (4) is connected to the relay axial flow fan (3); The partition (5) is fixedly connected to the frame (1). The windproof cloth (2) has an exhaust port (6) on the side away from the air inlet (4), and the exhaust port (6) is located on the upper and lower sides of the partition (5).

2. The air pressure relay device for clean ventilation in long tunnel construction according to claim 1, characterized in that, A connecting air belt (7) is fixedly installed at the air inlet (4), and the connecting air belt (7) is connected to the output end of the relay axial flow fan (3).

3. The air pressure relay device for clean ventilation in long tunnel construction according to claim 1, characterized in that, The exhaust vents (6) are provided in two places and are equidistant from the partition (5).

4. The air pressure relay device for clean ventilation in long tunnel construction according to claim 1, characterized in that, A zipper (8) is provided at the exhaust vent (6).

5. A wind pressure relay device for clean ventilation in long tunnel construction according to claim 1, characterized in that, The windproof cloth (2) is provided with an air inlet chamber (9) and an air outlet chamber (10).

6. A wind pressure relay device for clean ventilation in long tunnel construction according to claim 5, characterized in that, The partition (5) is disposed inside the air outlet chamber (10) and located in the middle of the air outlet chamber (10).

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