SU1713603A1 - Drop-action ignition device for burning off ground surface in extinguishing forest fires - Google Patents

Abstract

The invention relates to fire fighting equipment and can be used in extinguishing forest fires by the start of annealing. The purpose of the invention is to improve the convenience and safety of operation of the device while increasing productivity due to the greater rate of warming up of the ground cover from the effects of the flame and droplets of the means being ignited. The device contains a tubular XJca (> & Oy > &

Description

shell 1 combustible element 2. At the end of the device there is a grating fuse 3 mounted, covered with a cap 4 equipped with a float 5. The outer surface of shell 1 has a coating 7 of melting non-combustible material, for example, aluminum foil. Shell 1 is made of meltable combustible material, for example from polystyrene, which forms burning drops when ignited. Slow pyrotechnic composition was used as a fuel element 2. During operation, the fuse 3 is ignited by the float 5, from which pyrotechnic composition 2 is ignited, and the device is pulled through the twine with a twine. The burning of the ground cover occurs both from the impact of the flame and from the remaining burning drops of the shell 1 material. The coating 7 prevents the front combustion of the shell 1. 2 C, C, F, 1 Il.

The invention relates to fire fighting equipment and can be used to extinguish forest fires by the method of starting annealing (oncoming fire).

An incendiary device with droplet action for annealing the ground cover during extinguishing forest fires is known, which contains a fire means (a burner with a hollow wick made of heat-resistant material), which contains a combustible element placed in a tubular casing, which uses gasoline-autolith mixture coming from a vessel through a needle valve .

The closest to the proposed technical essence is an incendiary device with a droplet action for annealing the ground cover of extinguishing and forest fires, containing fireable means (a burner consisting of a housing with a feeding tube, between which a wick of fiberglass is placed) comprising a wick placed in a tubular shell A hot & element that uses the gasoline / avtom mixture coming from the tank through the hose.

However, these devices are characterized by inconvenience in operation due to the significant overall dimensions, large mass, the need to have a supply of combustible mixture; the lack of security guarantees for a worker who, under extreme conditions of fighting a forest fire, bears the capacity of a flammable liquid in the immediate vicinity of the current burner; insufficient productivity of annealing due to the low rate of heating of the ground cover, due to the relatively low flame temperature.

The chain of the invention is to increase the convenience and safety of operation while increasing productivity over time.

due to the greater rate of warming up of the ground cover from exposure to the flame and droplets of the ignited agent.

The goal is achieved by those. what

in an incendiary device with a droplet action for annealing the ground cover during extinguishing forest fires, containing ignitable means, including combustible placed in a tubular casing

the element, as a fuel element, a slow-burning pyrotechnic composition is used, and the burning means includes a tubular envelope for the fuel element, made of melting

combustible material forming burning droplets when ignited.

In addition, the tubular casing is coated with a meltable non-combustible material, such as aluminum foil, and is made

from polystyrene.

The drawing shows the incendiary device with drip action.

The device contains a tubular casing 1, made of melting combustible material, for example, polystyrene, inside which a combustible element is enclosed - a slow-burning pyrotechnic composition 2 with the following ratio of components, wt.%: Potassium nitrate 75,

magnesium 15, iditol to. At the end of the device there is a grating fuse 3 mounted, covered with a removable cap 4 with a float 5 located on its outer surface. Through holes 6 are made at the opposite end of the device 6. Outer surface of the shell 1 viMeet coating 7 made of meltable non-combustible material, for example, aluminum foil . The device works as follows.

To ignite the ground cover, tie a twine or a piece of wire 1.5–2 m long using the holes 6 for this purpose, remove the cap 4

and the grater 5 ignites the fuse 3. When the pyrotechnic composition 2 is ignited from the fuse 3, the device is dragged across the surface of the soil, igniting the cover. The cover ignites both from the direct impact of the high-temperature flame and the droplet trace, which forms as a result of the melting and ignition of the shell material 1. The coating 7 prevents forward burning on the outer surface of the shell 1, ensuring uniform combustion of the pyrotechnic composition and the shell material, and under the action flame is also melted. As the composition burns down, the combustion zone advances to the opposite end of the device, melting and igniting new portions of the shell material. When the device is moved, the trail of burning droplets of the uphill material remaining behind it creates additional conditions for reliable ignition of the ground cover and formation of the edge of the oncoming fire. This makes it possible to reduce the time of exposure of the ground cover directly to the flame of the flame and to accelerate the movement of the device along the annealing line.

The use of the present invention will make it possible to obtain an economic effect in the national economy by increasing the convenience and safety of operating an incendiary device with droplet action while increasing productivity due to the greater rate of warming up of the ground cover from the effects of the flame and the hot drip trail.

Claims (3)

1. A dropping firing device for annealing the ground cover during forest fire extinguishing, containing fireable means including a combustible element placed in a tubular casing, which is different in that with the aim of increasing the convenience and safety of operation while increasing productivity due to a higher ground heating rate cover from exposure to flames and droplet-burning agents. A slow burning pyrotechnic composition is used as a combustible element, and the burning means includes a tubular casing for a combustible element made of meltable combustible material forming burning droplets when ignited. 2. A device according to Claim 1, in that, in order to ensure a uniform combustion of the pyrotechnic composition and the tubular casing, the latter is coated with a meltable non-combustible material, such as aluminum foil. 3. A device according to Claims 1 and 2, such that the tubular casing is made of polystyrene.