Funnel fire extinguishing system and fire extinguishing method

Abstract

The invention relates to a funnel fire extinguishing system and a fire extinguishing method.When a fire breaks out in a tunnel, a start button is pressed, or a compressed air foam gun automatically finds a fire area and is automatically started, or a worker remotely starts the compressed air foam gun, a system controller starts a compressed air foam generation device and switches on partition control valves, water flow is automatically adjusted, foam liquid and gas flow can be automatically adjusted according to water flow, compressed air foam is formed and a foam gun in a field worker handheld box is aligned to the fire area for fire exchanging, or the compressed air foam gun is automatically aligned to the fire area for jet fire extinguishing, or the worker remotely controls the compressed air foam gun to be aligned to the fire area for jet fire extinguishing.After fire extinguishing, a system restores the initial state under normal conditions.The problems that the fire extinguishing mode of an existing fire extinguishing technology in the tunnel is single, the fire extinguishing efficiency is low and safe evacuation of staff is not easy are solved.Fire extinguishing efficiency of the system is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting fixed fire extinguishing, and in particular relates to a tunnel fire extinguishing system and a fire extinguishing method. Background technique [0002] With the rapid development of traffic construction such as highways, railways, and subways, there are more and more long tunnels. While these long tunnels bring convenience to transportation, they also put forward higher requirements for tunnel disaster prevention and rescue. Especially for long underwater tunnels, once a fire accident occurs, it will not only cause a large number of casualties, but also damage the tunnel structure and affect transportation. For example, for an extra-long railway tunnel with a length of more than 20km, once a train fire accident occurs in the tunnel, it is difficult to drive out of the tunnel relying only on residual power, and it is necessary to carry out fire fighting in the tunnel. Therefore, from the p...

AI Technical Summary

Problems solved by technology

[0004] (1) Fine water mist mainly uses physical methods to extinguish fire, and the particle size of fine water mist is small, which is easily affected by the ventilation and smoke exhaust in the tunnel, and it is difficult to penetrate the fire plume of the train fire. The actual fire extinguishing efficiency is not high;

[0005] (2) The fire extinguishing medium of ordinary fine water mist is still water, and its wetting and penetration ability is average, so the fire extinguishing effect on solid deep fires in tunnels is not good, and it can only play a role in suppressing or controlling fires, but very It is difficult to completely extinguish the fire;

[0006] (3) Spraying fine water mist in the tunnel can easily disturb the smoke layer at the top of the tunnel, causing high-temperature and toxic smoke to fill the entire tunnel, greatly reducing the visibility in the tunnel, which is not conducive to the escape and safe evacuation of personnel

The existing compressed air foam fire extinguishing equipment is divided into two types: mobile (such as compressed air foam fire truck) and fixed type. Among them, the mobile compressed air foam fire truck has a complex structure and requires fire fighting professionals to control the fire; the existing fixed type The compressed air foam fire extinguishing device is mainly a deluge system, that is, the fire extinguishing protection of the partition is carried out through the foam nozzle. After the compressed air foam fire extinguishing device is started, all the nozzles in a partition will spray together, and the water flow and foam state cannot be changed.

In addition, since fires in vehicles such as trains and subway carriages mainly occur inside the carriages, and the metal body of the vehicle blocks the foam, making it difficult for the foam to be applied to the interior of the carriages, the fire-fighting effect of this deluge system for tunnels is not good.

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