Recycling-type tunnel smoke prevention device

Abstract

The invention belongs to the field of road tunnels and railway tunnels, and particularly relates to a recycling-type tunnel smoke prevention device, which mainly aims at solving the present problem of the present tunnel safety evacuation passage that the pressurizing ventilation effect is limited. A recycling-type air curtain machine which is arranged on a junction of a tunnel safety evacuation passage and a main tunnel, air which is blown by a blower through an air blowing strip stream on the air curtain machine forms a high pressure air curtain at an entrance of the safety evacuation passage to prevent the smoke of the main tunnel from entering the safety evacuation passage; and the returned air from an air return port on the air curtain machine flows back to a dust collector through a wind pipe, the smoke which is possibly mixed in the returned air can be purified, and the clean air is re-sent onto the air blowing strip seam on the recycling-type air curtain machine through the blower, therefore, no smoke inside the safety evacuation passage can be guaranteed.

Description

[0001] technical field [0002] The invention belongs to the field of road tunnels and railway tunnels, and in particular relates to a recycling type tunnel smoke prevention device. Background technique [0003] The tunnel evacuation channel is the escape channel for people to evacuate when a fire breaks out in the tunnel. When a road tunnel or railway tunnel is equipped with a safe evacuation passage parallel to the tunnel, in order to prevent the fire smoke in the driving tunnel from entering the safe evacuation passage, according to Article 12.3.3 of the "Code for Fire Protection Design of Buildings" (GB 50016-2006): Tunnel fire An independent mechanical pressurized air supply system should be installed in the refuge facility, and the residual pressure value of the air supply should be 30-50pa. Existing smoke prevention systems for tunnel evacuation passages generally use axial flow fans at both ends of the tunnel to pressurize the evacuation passages. The length of safe...

AI Technical Summary

Problems solved by technology

Existing smoke prevention systems for tunnel evacuation passages generally use axial flow fans at both ends of the tunnel to pressurize the evacuation passages. The length of safe evacuation passages usually exceeds 1km, and the length of long tunnels may even reach more than 5km. The radius of the pressurized air supply is as long as several kilometers. Due to the limited level of civil construction, the capacity of the pressurized blower is large and the effect is poor. Therefore, it is difficult for the existing tunnel evacuation channel smoke prevention system to ensure that any position in the tunnel can have a good smoke prevention effect.

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