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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

Active Publication Date: 2022-06-07
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alleviate the risk of freezing damage caused by the large intrusion of outdoor cold air at the tunnel entrance section in cold regions, solve the problems of high-load operation of the tunnel insulation system, huge energy consumption and fire caused by high-load operation, and solve the problem of traditional air curtain systems that are effective but extremely low cost performance and high-speed airflow Rolling up a lot of dust makes the environment in the tunnel worse

Method used

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

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Effect test

Embodiment 1

[0129] This embodiment discloses an air curtain system at the top of a tunnel, which utilizes natural ventilation to reduce cold air intrusion in the opening section of a pointed top and square bottom tunnel in a cold region. Surface structure 3; Arc surface export wind panel 4;

[0130] Among them, the lead-in wind panel is connected with the arc structure at the bottom of the main body of the air duct in turn, forming an integrated structure. In addition, the lead-in wind panel is connected with the two side walls of the original tunnel, so that the entrance area is closed; the lead-in wind panel is a type of The start line sweeps over the three-dimensional surface formed by the guide line of the incoming air plate. The air plate structure is the same as the top structure of the spire tunnel in the radial direction and the same as the initial line of the incoming air plate in the transverse direction. The arc surface structure at the bottom of the main body of the air duct is...

Embodiment 2

[0141] This embodiment discloses an air curtain system at the top of a tunnel, which utilizes natural ventilation to reduce cold air intrusion in the opening section of a pointed top and square bottom tunnel in a cold region. Surface structure 3; Arc surface export wind panel 4;

[0142]Among them, the lead-in wind panel is connected with the arc structure at the bottom of the main body of the air duct in turn, forming an integrated structure. In addition, the lead-in wind panel is connected with the two side walls of the original tunnel to close the entrance area; the lead-in wind panel is a type of The start line sweeps over the three-dimensional surface formed by the guide line of the incoming air plate. The air plate structure is the same as the top structure of the spire tunnel in the radial direction and the same as the initial line of the incoming air plate in the transverse direction. The arc surface structure at the bottom of the main body of the air duct is: A curved...

Embodiment 3

[0160] This embodiment discloses a tunnel top air curtain system that uses natural ventilation to reduce cold air intrusion in the opening section of a pointed top and square bottom tunnel in a cold region. These curved surfaces with specific curve forms constitute the main space of the air duct, and the material adopts the same concrete structure as the tunnel lining. When safety and reliability are required, the construction method can be further refined. It mainly includes the inlet air plate 1; the cambered surface structure 2 at the bottom of the main body of the air duct; the cambered surface structure 3 at the top of the air duct main body; The specific curved form is used to optimize the arc surface of the air duct, so that the air duct can change the direction of the air entering from the air inlet panel with low resistance to form a directional air curtain that is opposite to the air inlet direction of the tunnel but has a certain inclination angle. After passing thr...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F1/00E21F1/04E21F1/14E21F1/18G06F30/20
CPCE21F1/003E21F1/04E21F1/14E21F1/18G06F30/20Y02B30/70
Inventor 杜五一邓保顺马江燕王雄慧江晶晶宋喆高然张思凯
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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