Ventilation and smoke exhaust system of tunnel

Abstract

The embodiment of the invention provides a ventilation and smoke exhaust system of a tunnel, which comprises an end smoke exhaust device arranged at the end of a smoke exhaust air duct of the tunnel; and the multiple discharge flue relay devices are arranged in a smoke discharge air flue of the tunnel at intervals, the discharge flue relay devices are used for blowing air to the smoke discharge air flue in a segmented mode to increase the pressure in the smoke discharge air flue, and the discharge flue relay devices and the end smoke discharge devices jointly discharge smoke in the smoke discharge air flue out of the smoke discharge air flue. According to the embodiment of the invention, the smoke exhaust duct relay device is mounted in the smoke exhaust duct, and the end smoke exhaust device is mounted at the end of the smoke exhaust duct, so that a fixed-point smoke exhaust function is formed, the problem that the negative pressure value of the smoke exhaust duct is increased when a smoke exhaust duct pipeline is relatively long is effectively solved, the pipe network resistance of the smoke exhaust system is reduced, and the service life of the smoke exhaust system is prolonged. The problem that the smoke exhaust system fails due to the fact that the air speed of the smoke exhaust opening is too large in the near-end ignition working condition of the smoke exhaust air duct is solved, and the reliability and intelligence of the ventilation and smoke exhaust system are improved.

Description

technical field [0001] The present application relates to the technical field of ventilation and smoke exhaust, and in particular to a ventilation and smoke exhaust system for a tunnel. Background technique [0002] A tunnel is a channel set in a mountain or underground. Due to the linear engineering of underwater tunnels and mountain tunnels, when passing railway trains, subway vehicles, cars and people, due to ground or mountain conditions, emergencies often occur. The tunnel is closed. In order to ensure the safety of the vehicle operators in the tunnel and provide guarantee for the evacuation of passengers, a ventilation and smoke exhaust system must be installed in the tunnel to adjust the air circulation in the tunnel and ensure the safety of vehicle personnel. [0003] In the existing ventilation and smoke exhaust system, a flue gas exhaust duct and a smoke exhaust air valve are usually arranged inside the tunnel along the direction of the tunnel. The flue gas from t...

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Problems solved by technology

[0004] However, when the length of the tunnel is longer, on the one hand, the number of exhaust outlets on the exhaust path increases, resulting in an increase in the resistance of the exhaust system pipe network and the negative pressure value of the exhaust pipeline, which makes the pressure difference between the driveway and the exhaust pipeline too large. As a result, the air leakage at the construction joints of the smoke exhaust pipeline increases, which not only increases the purchase and installation costs of the smoke exhaust damper, but also causes the failure of the fixed-point smoke exhaust system and reduces the reliability of the smoke exhaust system

On the other hand, the number of smoke exhaust shafts and tunnel machine rooms has increased, leading to construction difficulties, long construction periods and increased construction risks, which have increased civil engineering and mechanical and electrical construction and installation costs by tens of millions.

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