Tunnel smoke exhaust system and tunnel

Abstract

The embodiment of the invention provides a tunnel smoke exhaust system and a tunnel. The smoke exhaust system comprises a smoke exhaust channel, a smoke outlet, an internal smoke exhaust device and end smoke exhaust devices; the smoke exhaust channel is disposed in the tunnel and extends in the length direction of the tunnel; the smoke exhaust channel is separated from a driving channel of the tunnel through a dividing wall; the smoke outlet is formed in the partition wall; the internal smoke exhaust device is arranged at the smoke outlet; when the smoke exhaust system is in a non-smoke-exhaust working condition, the internal smoke exhaust device is in a stop state so as to seal the smoke outlet; when the smoke exhaust system is in a smoke exhaust working condition, the internal smoke exhaust device is in a working state to open the smoke outlet to exhaust smoke to the smoke exhaust tunnel; the end smoke exhaust devices are arranged at the two ends of the smoke exhaust channel; when the smoke exhaust system is in the non-smoke-exhaust working condition, the end smoke exhaust devices are in a closed state; and when the smoke exhaust system is in the smoke exhaust working condition,the end smoke exhaust devices are in a working state to exhaust smoke from the smoke exhaust channel. According to the tunnel smoke exhaust system and the tunnel provided by the embodiment, the smokeexhaust speed and the smoke exhaust effect can be improved.

Description

technical field [0001] The present application relates to tunnel smoke exhaust technology, in particular to a tunnel smoke exhaust system and a tunnel. Background technique [0002] A tunnel is a building opened underground, in a mountainous area, or underwater, for the passage of cars, trains, or urban rail vehicles. The tunnel is usually equipped with a smoke exhaust system, which is suitable for exhausting the internal smoke as soon as possible when a fire occurs in the tunnel. The smoke exhaust system includes: a smoke exhaust channel extending along the length of the tunnel and a number of smoke exhaust outlets. The smoke exhaust outlets are connected to the smoke exhaust channels. exhaust from the wind shaft. For terrain environments that are easy to construct, artificial islands or intermediate air shafts can be installed in the middle of the tunnel for horizontal smoke exhaust. However, for terrain environments that are difficult to construct, artificial islands or...

AI Technical Summary

Problems solved by technology

[0004] (1) The number of smoke exhaust outlets is large, resulting in a large amount of air leakage, especially when the smoke is exhausted at the far end, the attenuation is large, resulting in poor smoke exhaust effect;

[0005] (2) The smoke exhaust air volume of each smoke exhaust port is uneven, and the air volume of each smoke exhaust port is difficult to balance;

[0006] (3) It is necessary to install a smoke exhaust fan with a large pressure head and a high power at both ends of the smoke exhaust channel, which requires high performance of the smoke exhaust fan, which makes it difficult to select the equipment;

[0007] (4) The greater the power of the smoke exhaust fan, the slower the start-up speed, which leads to the hysteresis of the smoke exhaust; and because the smoke exhaust channel is long, the smoke exhaust response is also delayed, resulting in the smoke at the ignition point being delayed. go;

[0008] (5) The longer smoke exhaust channel will also lead to greater smoke exhaust resistance, and the smoke exhaust effect is limited

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