RU2492888C2 - Method of extinguishing forest fires - Google Patents

Abstract

FIELD: fire-prevention facilities.

SUBSTANCE: method of extinguishing forest fires by forming the counter artificial front of crowning fire using the flame of flammable liquid that is directed through the hoses through the mixer located under the aircraft.

EFFECT: development of an effective method of extinguishing forest fires with backfire.

2 cl, 2 dwg

Description

The invention relates to the field of extinguishing forest fires in the opposite direction.

A known method of extinguishing forest fires is to supply a fire extinguishing agent to a fire zone and / or a barrier strip, in which a combined jet of low-foam foam is used as a fire extinguishing agent (RU 2394724 C2, IPK7 A62C 3/02, 5/02 published: 20.07 .2010).

A known method of extinguishing fires using a flamethrower, which allows to increase fire extinguishing efficiency (RU 2155621 C2, MPK7 A62C 2/00, 11/00, 13/00, published: 09/10/2000). The method consists in suppressing combustion processes by exposing a fire to a directional high-speed jet of a fire-extinguishing aerosol generated when throwing from a flamethrower, ignition and combustion in flight. In this case, generating compositions of one or different compositions or a mixture of an aerosol generating composition or with fire extinguishing powders, or with water, or with aqueous solutions of salts and / or their mixtures, with a different order of their placement during throwing and ignition in flight, are used as an aerosol. Ignition and combustion of the composition with the formation of a directed aerosol jet occurs in flight and / or above a burning object, and / or inside a burning object.

As a disadvantage of the known method, the complexity of the compositions used can be noted.

A known method of extinguishing forest fires is that a shock wave front is formed in the upper zone of the fire, which is formed from explosives simultaneously detonated or detonated with cord or pre-installed containers with a mixture of extinguishing agents capable of detonation (RU 2243014 C1, MPK7 A62C 3/02, published: 12/27/2004). while the bottom fire is extinguished using fire extinguishing modules discharged from the aircraft, the fire extinguishing agent is supplied in parallel or at an angle to the surface.

The disadvantages of this method include inadequate safety when extinguishing.

The task to which the claimed technical solution is directed is to develop an effective method of extinguishing forest fires with a backfire.

When implementing the proposed technical solution, the task is solved by achieving a technical result, which consists in increasing the efficiency and safety of extinguishing flattering fires.

The specified technical result is achieved in that the method of extinguishing forest fires consists in forming an artificial line of the oncoming fire front by exposing from a helicopter a mixture of fuel and air supplied through hoses combined into a mixer under the helicopter at a safe distance to form a directional torch. In addition, the mixer is equipped with additional removable metal disks to ensure a minimum amplitude of swinging the torch.

The method is illustrated by drawings, where Fig. 1 shows a method of extinguishing forest fires, a sectional view (frontal), Fig. 2 is the same, a top view.

In the FIGS. the numbers indicate: 1 - a helicopter, 2 - an artificial front fire line (an artificial fire front line), 3 - the primary fire movement vector, 4 - the width of the neutral zone between the fire fronts, 5 - flamethrower torch, 6 - air-fuel mixer.

To implement the method of extinguishing forest fires, the following material part is necessary:

- aircraft - helicopter 1,

- two oil resistant hoses (longer than 20 m),

- mixer 6 for the formation of a torch 5 (torch length of at least 5 meters or more for the safety of a helicopter 1 when flying above a burning forest to avoid hooks on the tops of trees).

Hoses are respectively connected to the sources of fuel and air installed in the aircraft - helicopter 1.

In the lower part, the hoses (at a safe distance from the helicopter 1) are mounted in the mixer 6 and brought to the common hole, which is the nozzle of the torch 5. If necessary, the mixer 6 can have an additional mass in the form of removable metal disks for a minimum amplitude of swinging of the torch 5, which should provide a clearer line of artificial front 2 riding fire.

The distance between the fronts of horse fires is determined depending on the wind speed, in direct proportion.

The method is implemented as follows.

In the initial position (before extinguishing) configure the launch system of the torch 5 flamethrower, which can be used flamethrower of any known design, in particular the army. To do this, first supply a liquid - a mixture of fuel and air. Then they turn on the ignition system, which is two insulated wires connecting the nichrome spiral to the current source on board helicopter 1. The wires and hoses must be in a flexible metal heat-resistant casing and the free inner space of the casing is filled with a heat-resistant soft insulator, such as an asbestos cord. The length of the entire system is about 20 meters, and in an emergency, the system instantly shuts down and undocks from the helicopter 1 while shutting off the fuel supply.

An artificial line of the oncoming fire front (ignition) is created by igniting the fuel-air mixture supplied from a helicopter in front of the fire front at a distance determined depending on the wind speed. Due to the vertical movement of hot air masses between the fronts, a rarefied space is formed. This condition is the reason for their reciprocal movement. Both combustion fronts meet, burning everything together, and the fire stops.

The method is implemented using the current model on the dry grass of an abandoned meadow.

In addition to the tasks of the fire plan, this method can be used for heat treatment of the infected surface, for the destruction of harmful insects such as locusts, etc.

Claims (2)

1. A method of extinguishing forest fires by forming an oncoming artificial front of a riding fire, while a torch of flammable liquid is used to form an artificial front of a riding fire, which is sent through hoses through a mixer located under the aircraft. 2. The method of extinguishing forest fires according to claim 1, characterized in that the specified mixer is equipped with additional removable metal disks to ensure minimum amplitude of rocking of the torch.

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