Self-air-curtain system for reducing outdoor air invasion amount of sharp-top square-bottom tunnel

An outdoor air and air curtain technology, which is applied in mine/tunnel ventilation, earthwork drilling, climate sustainability, etc., can solve the problems of high-load operation of the tunnel insulation system, deterioration of the environment inside the tunnel, and low cost performance, and achieve Reduce the amount of air intrusion, reduce energy consumption, and reduce the effect of intrusion

Active Publication Date: 2020-11-10
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 ...

Method used

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  • Self-air-curtain system for reducing outdoor air invasion amount of sharp-top square-bottom tunnel
  • Self-air-curtain system for reducing outdoor air invasion amount of sharp-top square-bottom tunnel
  • Self-air-curtain system for reducing outdoor air invasion amount of sharp-top square-bottom tunnel

Examples

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Effect test

Embodiment 1

[0129] This embodiment discloses an air curtain system at the top of the tunnel that utilizes natural ventilation to reduce the intrusion of cold wind at the entrance section of a tunnel with a sharp top and a square bottom in a cold region. The system includes an air guide plate 1; surface structure 3; curved surface leading wind plate 4;

[0130] Among them, the inlet wind plate is connected with the arc surface structure at the bottom of the main body of the air duct in turn, forming an integrated structure. In addition, the inlet wind plate is connected with the original two side walls of the tunnel to close the entrance area; The inlet and outlet edges of the air duct are curved lines, while the body of the transverse wind panel is a three-dimensional curved surface with a specific slope and straight surface, and the arc surface structure at the bottom of the main body of the air duct is a curved surface with convex arcs;

[0131] The arc surface structure at the top of t...

Embodiment 2

[0141] This embodiment discloses an air curtain system at the top of the tunnel that uses natural ventilation to reduce the intrusion of cold wind at the entrance of a tunnel with a sharp top and a square bottom in a cold region. The system includes an air guide plate 1; surface structure 3; curved surface leading wind plate 4;

[0142] Among them, the inlet wind plate is connected with the arc surface structure at the bottom of the main body of the air duct in turn, forming an integrated structure. In addition, the inlet wind plate is connected with the original two side walls of the tunnel to close the entrance area; The inlet and outlet edges of the air duct are curved lines, while the body of the transverse wind panel is a three-dimensional curved surface with a specific slope and straight surface, and the arc surface structure at the bottom of the main body of the air duct is a curved surface with convex arcs;

[0143] The arc surface structure at the top of the main body o...

Embodiment 3

[0160] This embodiment discloses an air curtain system at the top of the tunnel that uses natural ventilation to reduce the intrusion of cold wind at the entrance of a tunnel with a sharp top and a square bottom in a cold area. These curved surfaces with specific curved forms constitute the main space of the air duct, and its 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 introduction wind plate 1; the arc surface structure 2 at the bottom of the main body of the air duct; the arc surface structure 3 at the top of the air duct main body; A 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 guide plate with low resistance, forming a directional air curtain that is opposite to the air inlet direction of the tunnel but has a certain angle of inclinati...

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Abstract

The invention relates to a self-air-curtain system for reducing the outdoor air invasion amount of a sharp-top square-bottom tunnel. The system comprises a guide-in air plate, an air duct body bottomcambered surface structure, an air duct body top cambered surface structure and a cambered surface guide-out air plate. The guide-in air plate and the air duct body bottom cambered surface structure are connected in sequence to form a lower integrated structure; and the air duct body top cambered surface structure and the cambered surface guide-out air plate are connected in sequence and are of anupper integrated structure. According to the self-air-curtain system, each cambered surface forming an air duct has a specific curve form, and through specific cambered surface air ducts, the air duct can change the direction of air entering from the guide-in air plate with low resistance, so that a directional air curtain which is opposite to the air inlet direction of the tunnel and has a certain inclination angle is formed. The system is simple in structure and extremely high in reliability, external input energy is not needed, meanwhile, high-load operation of a tunnel heat preservation system is avoided, and the probability of accidental dangers is reduced.

Description

technical field [0001] The invention belongs to the field of tunnel and underground engineering ventilation engineering, and in particular relates to a self-air curtain system for reducing outdoor air intrusion in a tunnel with a pointed top and a square bottom. Background technique [0002] There are two types of problems in tunnel and underground engineering ventilation engineering: 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 that is not conducive to the environment in the tunnel invade 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 intrude into the tunnel, causing freezing cracks in the tunnel lining and freezing damage to equipment and facilitie...

Claims

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Application Information

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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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