Subway station hall smoke prevention and exhaust method based on real-time monitoring

Abstract

The invention discloses a subway station hall smoke prevention and exhaust method based on real-time monitoring. The method includes the steps that when a fire occurs in a station hall layer public area, a smoke sensor in a certain subarea senses the existence of smoke firstly and transmits a signal to a smoke exhaust system; a smoke exhaust draught fan is started in the subarea, and a smoke blocking vertical wall descends at a middle ceiling of the public area; the smoke in the subarea is effectively controlled through exhaust pipes and exhaust outlet; and when the smoke spreads into a certain entrance and exit channel, the smoke sensor in the channel is triggered, and at the moment, the smoke blocking vertical wall in the channel descends. The subway station hall smoke prevention and exhaust method based on real-time monitoring aims to effectively control the smoke generated under the station hall layer fire working condition and facilitate smoke discharging, and additionally arrangea smoke control structure in the entrance and exit channel, so that the smoke spreading situation in the entrance and exit channel is reduced, and persecondarynel evacuation is facilitated.

Description

technical field [0001] The invention belongs to the field of rail transit smoke prevention and control, in particular to a real-time monitoring-based smoke control method for subway station halls. Background technique [0002] When a fire breaks out on the hall floor of a subway station or fire acceptance is performed, the smoke exhaust system is usually turned on, and the overall smoke exhaust control is carried out through uniformly arranged smoke exhaust outlets. However, this overall control method has certain disadvantages. When the fire source is located at the end of the station hall, opening all the smoke outlets will aggravate the spread of smoke to the other end and increase the smoke diffusion distance. At the same time, under fire conditions, each entrance and exit of the subway station is used as a natural supplementary air outlet to provide a certain amount of natural supplementary air for the smoke exhaust system, but the supplementary air volume has certain l...

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Problems solved by technology

However, this overall control method has certain shortcomings. When the fire source is located at the end of the station hall, opening all the smoke outlets will aggravate the spread of smoke to the other end, increasing the smoke diffusion distance

At the same time, under fire conditions, each entrance and exit of the subway station is used as a natural supplementary air outlet to provide a certain amount of natural supplementary air for the smoke exhaust system, but the supplementary air volume has certain limitations. It will become the outlet of the smoke, causing the smoke to diffuse in the entrance and exit passages, seriously affecting the escape of personnel

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