Long tunnel fire smoke exhaust control system

Abstract

The embodiment of the invention provides a long tunnel fire smoke exhaust control system which comprises a plurality of distributed smoke exhaust control systems in one-to-one correspondence with smoke exhaust sections, and the distributed smoke exhaust control systems are arranged in the smoke exhaust sections corresponding to the distributed smoke exhaust control systems and traffic lane intervals where the smoke exhaust sections are located; a smoke exhaust air duct of the tunnel is divided into a plurality of smoke exhaust sections in the length direction of the tunnel. The distributed smoke exhaust control system is used for judging whether a fire disaster occurs in a traffic lane section where a corresponding smoke exhaust section is located or not; when a fire occurs, the position of a fire source point of the fire is judged, and according to a preset main smoke exhaust control strategy corresponding to the position of the fire source point, smoke exhaust is carried out on a smoke exhaust section corresponding to the distributed smoke exhaust control system. According to the embodiment of the invention, fire can be judged on site, smoke can be exhausted on site, smoke can be exhausted rapidly and accurately, and the smoke exhaust efficiency is high.

Description

technical field [0001] The invention relates to the technical field of tunnel ventilation and smoke exhaust, in particular to a long tunnel fire smoke exhaust control system. Background technique [0002] Long tunnels are limited by factors such as water surface channels, ecological environment protection, and mountain geological conditions. The smoke exhaust system of ultra-long tunnels generally adopts a fixed-point smoke exhaust system. It is difficult to match the operating points with the design requirements, the control system has a slow fire response speed, and a low degree of automation and intelligence. The specific problems are as follows: [0003] (1) The resistance loss of the fixed-point smoke exhaust system has a large variation range, it is difficult to select the installation location of the equipment, and the degree of adaptation to the smoke exhaust control system is low. The exhaust air duct is too long, resulting in a large variation range of pressure ...

AI Technical Summary

Problems solved by technology

[0003] (1) The resistance loss of the fixed-point smoke exhaust system has a wide range of changes, and it is difficult to choose the installation location of the equipment, and the degree of adaptation to the smoke exhaust control system is low

The smoke exhaust duct is too long, resulting in a large range of pressure loss in the far and near system of the exhaust duct, and it is difficult to match the performance curve of the exhaust fan. At the same time, the preset mode of the smoke exhaust control system deviates greatly from the actual working conditions of the smoke exhaust system , poor smoke exhaust effect

[0004] (2) The identification speed of the fire source is slow, the accuracy and intelligence are low, and there are false positives and false positives

The dual-band fire detector is installed on the side wall, and there is a blind area in the detection range, which cannot penetrate objects to identify the fire source; the temperature-sensing optical fiber is affected by factors such as wind speed, smoke and thermal environment changes, and the alarm point is deviated, and the temperature measurement response time is long. Difficult to maintain later

[0005] (3) The working conditions of the smoke exhaust system are complicated, the automation and intelligence of the smoke exhaust control system are low, and the reliability of the smoke exhaust system is poor

The smoke exhaust area of ​​the tunnel fire involves a wide range of smoke exhaust conditions, and the identification of the fire source needs to be manually confirmed. The smoke exhaust control system has few preset working conditions and slow response speed, so it is impossible to select and start the corresponding fire control mode in a timely and intelligent manner. , relying too much on manual operations at the control center

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