Self-air curtain system for reducing air invasion amount of dome and square bottom shaped tunnel

An air curtain and tunnel technology, which is applied in mine/tunnel ventilation, earthwork drilling, mining equipment, etc. It can solve problems such as deterioration of the environment in the tunnel, high-load operation of the tunnel insulation system, and high energy consumption.

Active Publication Date: 2020-11-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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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 air invasion amount of dome and square bottom shaped tunnel
  • Self-air curtain system for reducing air invasion amount of dome and square bottom shaped tunnel
  • Self-air curtain system for reducing air invasion amount of dome and square bottom shaped tunnel

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Effect test

Embodiment 1

[0080] This embodiment discloses an air curtain system at the top of the tunnel that utilizes natural ventilation to reduce cold wind intrusion at the entrance section of a tunnel with a round top and a square bottom in a cold area. The system includes an air guide plate 1; Arc surface structure 3; arc surface leading wind plate 4;

[0081] Among them, the air guide 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 air guide plate is connected with the original two side walls of the tunnel, forming a four-sided closed area at the entrance to guide the air flow into the main air duct; The wind panel is a three-dimensional curved surface with a specific slope and a straight surface formed by sweeping a straight line with a specific slope as the starting line and the curve of the original tunnel top as a guide line. out of the surface;

[0082] The arc surface structure at t...

Embodiment 2

[0094] 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 opening section of a road tunnel with a round top and a square bottom in cold regions. Arc surface structure 3; arc surface leading wind plate 4;

[0095] Among them, the air guide 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 air guide plate is connected with the original two side walls of the tunnel, forming a four-sided closed area at the entrance to guide the air flow into the main air duct; The wind panel is a three-dimensional curved surface with a specific slope and a straight surface formed by sweeping a straight line with a specific slope as the starting line and the curve of the original tunnel top as a guide line. out of the surface;

[0096] The arc surface structure at the top of the main body of the...

Embodiment 3

[0111] 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 opening section of a road tunnel with a round top and a square bottom in cold regions. The space is based on these curved surfaces with specific curves to form the main space of the air duct. The material used is 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...

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Abstract

The invention provides a self-air curtain system for reducing air invasion amount of a dome and square bottom shaped tunnel. The self-air curtain system comprises cambered surface air ducts with specific curve forms, and mainly comprises an air guide-in plate, an air duct main body top cambered surface, an air duct main body bottom cambered surface and an air guide-out plate, and each cambered surface forming the air duct has a specific curve form. Through the specific cambered surface air ducts, the air duct can change the direction of air entering from the guide-in air plate in a low-resistance mode, and 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, besides, the 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 specifically relates to an air curtain system at the top of a tunnel that utilizes natural ventilation to reduce the intrusion of cold wind at the opening section of a tunnel with a domed 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/14
CPCE21F1/14E21F1/003
Inventor 高然张思凯杨长青郭纬周航王萌杜五一
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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