Sectional type tunnel smoke exhaust system and method by water curtain separation

Abstract

The invention relates to a sectional type tunnel smoke exhaust system by water curtain separation, comprising a smoke exhaust duct, a smoke exhaust vent and an air valve. The smoke exhaust duct is positioned on the top or the side wall of a tunnel; the smoke exhaust vent is communicated with the smoke exhaust duct; the air valve is installed on the smoke exhaust vent; and the top or the side wall of the tunnel is provided with devices used for forming fire control water curtains. The invention also provides a smoke exhaust method which uses the sectional type tunnel smoke exhaust system. The smoke exhaust method comprises the following steps of: starting the devices which are used for forming the fire control water curtains and positioned on both sides of a fire source to form the water curtains and separating smoke gas generated by the fire source between the two water curtains; and starting the smoke exhaust vent which is positioned near the fire source to exhaust smoke. The invention has the advantages of optimizing the smoke exhaust effect of a highway tunnel, improving the smoke exhaust efficiency under the condition of the same smoke exhaust configuration, reducing the range of smoke gas influence, effectively controlling the diffusion of smoke gas within 200 meters, greatly reducing the heat radiation near the fire source and supplying better safety space for people escape and fire control.

Description

technical field [0001] The invention relates to a segmented long tunnel smoke exhaust technology that adopts water curtain isolation, and is mainly used for smoke exhaust in a long tunnel with high fire risk. Background technique [0002] The road tunnel is a semi-enclosed space, and the burning materials are mostly gasoline and diesel oil. Once a fire breaks out, the high temperature and toxic smoke generated are extremely difficult to get rid of in time, which will cause great harm to the facilities and personnel in the underground space, and easily cause Malignant accidents, so ventilation and smoke exhaust is the most important measure for tunnel fire protection. In road tunnels, suitable smoke control systems must be in place. For long tunnels, it is recognized as an effective tunnel smoke control technology in the world to set up a smoke exhaust duct at the top or other parts along the longitudinal direction of the tunnel, and to open a series of smoke exhaust outlets...

AI Technical Summary

Problems solved by technology

At present, many tunnels adopt the above-mentioned smoke exhaust method, but in actual engineering, it is found that due to the existence of the longitudinal wind in the tunnel and the chimney effect in the event of fire, the smoke continues to spread along the tunnel longitudinally, so that the smoke exhaust efficiency of the smoke exhaust port is very low. Cannot effectively remove smoke from fire

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