Self-air curtain system for reducing outdoor air intrusion in a tunnel with a sharp top and a square bottom

An outdoor air and tunnel technology, which is applied in mine/tunnel ventilation, earthwork drilling, climate sustainability, etc., can solve problems such as high-load operation of the tunnel insulation system, deterioration of the environment inside the tunnel, and low cost performance, and achieve reduction Effect of air intrusion, energy consumption reduction, and low cost
CN111911218BActive Publication Date: 2022-06-07CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
Publication Date
2022-06-07

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Abstract

The invention relates to a self-air curtain system for reducing the intrusion of outdoor air in a tunnel with a sharp top and a square bottom. The plate and the arc surface structure at the bottom of the main body of the air duct are sequentially connected to form a lower integral structure; the arc surface structure at the top of the main body of the air duct and the arc surface leading out air plate are sequentially connected to form an upper integral structure. In the present invention, each curved surface constituting the air duct has a specific curved form. Through these specific arc-surfaced air ducts, the air duct can change the direction of the air entering from the air guide plate with low resistance, forming Directional air curtains with opposite wind direction but with a certain angle of inclination. The system of the invention has simple structure, extremely high reliability, does not require external energy input, avoids high-load operation of the tunnel thermal insulation system, and reduces the probability of accidental danger.
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Description

technical field

[0001] The invention belongs to the field of tunnel and underground engineering ventilation engineering, and particularly relates to a self-air curtain system for reducing the intrusion of outdoor air in a pointed top and square bottom tunnel. Background technique

[0002] There are two types of problems in tunnel and underground engineering ventilation projects: first, how to quickly and efficiently discharge dust particles, fire smoke and other harmful substances generated in the tunnel due to human activities or accidents through reasonable air organization; second, How to make the outdoor air unfavorable to the tunnel environment intrude into the tunnel as little as possible through reasonable air organization. For tunnels located in cold regions such as northeast and northwest my country, it is not uncommon for cold air to penetrate into the tunnel, causing freezing cracks in the tunnel lining and freezing of equipment and facilities, which makes the tun...

Claims

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