RU2737253C1 - Mine fire extinguishing mortar - Google Patents

Abstract

FIELD: fire-fighting equipment.SUBSTANCE: invention relates to fire extinguishing equipment and can be used for fire extinguishing in hard-to-access areas: forest fire and burning wood in hard-to-access areas - mountains, ravines, ravines, hills. Fire extinguishing mortar mine consists of a body, a cavity with fire-extinguishing composition, propellant and spraying charges, and is designed for mortar charging. According to the invention, its housing consists of two parts: head over-calibre, having shape, combining cone, cylinder and hemisphere, partially profiled for specified opening at initiation of spraying charges, filled with fire-extinguishing composition; tail, consisting of two successively located pipes, the first sub-calibre is arranged both in combat mine, second pipe is calibre, inside from bottom is filled with spraying charge, wad, fire-extinguishing compound and is connected with inner cavity of the above-calibre part, from pyrotechnic retarder through spraying charge and wad passes detonating cord to head fuse and spraying charge ring, shot range is adjusted on sub-calibre pipe and mortar guidance angle, initiation time of spraying charges is pyrotechnic retarder.EFFECT: invention can be used in military units involved in elimination of consequences of accidents, fire and rescue units.1 cl, 1 dwg

Description

The invention relates to a fire extinguishing technique and can be used to extinguish forest fires in hard-to-reach areas: riding forest fire and burning forests in hard-to-reach areas: mountains, gorges, ravines, hills. The invention can be used in military units involved in the elimination of the consequences of accidents, fire and rescue units.

Analog. In China, multiple launch rocket systems of the MLRS "GRAD" type with special fire-extinguishing rockets, caliber 120 mm, have been developed and are used for remote fire extinguishing. The missiles are made from the bodies of combat missiles, the warhead chamber is filled with fire extinguishing powder with an axial spray charge instead of a high-explosive charge. The Chinese practiced the accuracy of the missile hit and breaking the hardened glass in the window of the burning room. [1,2].

Disadvantages - low fire extinguishing efficiency for extinguishing an entire medium-sized room, the radius of dispersion of striking fragments from the rocket body is more than 40 mm. The powder is not effective for extinguishing forest fires.

Prototype. Fire extinguishing mine of 12 mm caliber, weighing Μ = 12 kg. Carries in the head plastic part Mop = 2.5-3 kg. Fire extinguishing powder. With a successful hit, the spray of the powder provides the following areas: effective extinguishing St = 2-3 sq. M, and knocking down the flame Sсб.pl = 5-10 sq. M. The mine is manufactured and tested in China. The cost of launching a mine from a mortar is up to 10-20 times lower compared to launching a rocket from an MLRS. High rate of fire from one barrel [1, 3].

Disadvantages - low efficiency of a powder cloud for extinguishing a ground fire - grass and ineffectiveness for extinguishing trees, bushes, especially their groups, since the design of the mine does not provide uniform, directional spraying of the extinguishing composition and detonation of the charge at the most advantageous point of the descending trajectory of the mine falling onto the fire fire. As a result of extinguishing the mine, it becomes unstable and ineffective.

The purpose of this invention is to create a mortar mine with an increased mass of extinguishing composition, providing a large extinguishing area, achieved by directional spraying of the composition.

This goal is achieved by the fact that a fire-extinguishing mortar mine, consisting of a body, a chamber with a fire-extinguishing composition, propellant and spraying charges, is made to load the mortar and its body consists of two parts: a head above-caliber, having a shape that combines a cone, a cylinder and a hemisphere, partially profiled for a given opening upon initiation of spray charges filled with a fire extinguishing composition; tail, consisting of two pipes arranged in series. The first sub-caliber is designed as in a war mine. The second pipe is gauge inside, from the bottom it is filled with a spray charge, wad, fire extinguishing composition and communicates with the inner cavity of the above-caliber part. A detonating cord passes from the pyrotechnic moderator through the spray charge and wad to the head fuse and the spray charge ring. The range of the shot is regulated on the sub-caliber tube and the angle of guidance of the mortar, the time of initiation of the spraying charges is controlled by a pyrotechnic retarder.

For a cone-shaped spraying directed downward, at least one annular spray charge is placed in the cone-shaped sector of the over-caliber part. When spraying charges are initiated at a given height, a downward-oriented, cone-shaped fire-extinguishing gas-droplet or gas-powder vortex is created above the target. When hitting an obstacle, the atomizing charges are initiated by a detonating cord from the head fuse.

FIG. 1 shows a longitudinal section of a mortar fire extinguishing mine. In the barrel of a mortar 1 with a bottom striker 2, before firing, a mine 3 is placed with its caliber pipe 4 and a sub-caliber pipe 5, equipped as the well-known tail part of a combat mine (positions 5-9), containing pipes 5 placed in series from the end cut: initiating cartridge 6 with a primer percussion igniter, mine flight stabilizers 7, the main propellant charge inside the sub-caliber tube 5, having holes 8 for setting fire to external, annular additional charges 9. The caliber tube 4, together with the above-caliber part, contain sequentially located: pyrotechnic retarder 10, end spray charge 11, wad 12, detonating cord 13, fire extinguishing agent 14 and ring spray charges 15. The above-caliber part of the mine consists of successively arranged parts: cone-shaped 16, cylindrical 17, hemispherical 18. In this case, cylindrical 17 is profiled longitudinally, and hemispherical radially 19. In the center of hemispherical sector 19 size Head fuse still available 20.

Fire extinguishing mortar mine works as follows. The process of loading a mine into a mortar and throwing it from a mortar does not differ from war mines. The mine is inserted into the bore of mortar 1 and freely falls down. The initiating squib 6 is pricked into the striker 2, the cartridge 6 is triggered and ignites the propelling mortar charge. The retarder 10 after a predetermined time ignites the detonating cord 13, the end atomizing charge 11 and at least one annular atomizing charge 15 of an explosive low-impulse substance, located in the over-caliber part. This placement of charges, the method of their initiation, the configuration of the body containing the OS, the profiling of the body parts 17 and 19 provides a gradual acceleration of the mass of the extinguishing composition and the creation of a cone-shaped vortex with a compacted front, as a result of which a conical gas-droplet or gas-powder vortex with a compacted front is created, which areas with a specific consumption of a fire-extinguishing composition of 0.3-0.8 kg / sq.m and the effect of the impact introduction of a finely sprayed OS into a charred, incandescent combustion surface. Provides effective extinguishing without reigniting.

With salvo throwing of mines and synchronous adjustment of their sights, it is possible to extinguish a large fire using a square-nested method with a series of volleys from several mortars. During a salvo, simultaneous mine explosions will create cone-shaped or disc-shaped vortices, mutually reinforcing each other and creating a large area of effective extinguishing. Then the mortar sights are adjusted, and the next square is extinguished. This is 3-5 times more accurate, cheap, environmentally friendly, effective extinguishing, compared to aerial bombardment. It is possible to use simple, cheap and widespread modern mortars in calibers of 60 mm and 82 mm.

Literature

1. Remote Smoke control and Fire-fighting by long-range handle and trolley Pulse-Extinguishers. “Fire Prevention and Control for Special Buildings and Small Fire Protection)), November 4-6, 2018, China Peoples Police University.

2. "Fire extinguishing charge", No. 1.718.827.074, Germany. 1971

3. "Fire-fighting rocket", No. 2.148.319., Germany, 1974

Claims (2)

1. A fire-extinguishing mortar mine, consisting of a body, a chamber with a fire-extinguishing composition, propellant and spraying charges, is made for loading a mortar, characterized in that its body consists of two parts: a head above-caliber, having a shape that combines a cone, a cylinder and a hemisphere, partially profiled for a given opening upon initiation of spray charges filled with a fire extinguishing composition; tail, consisting of two pipes arranged in series, the first sub-caliber is arranged as in a war mine, the second pipe is caliber, inside from the bottom it is filled with a spray charge, wad, fire extinguishing composition and communicates with the inner cavity of the above-caliber part, from the pyrotechnic moderator through the spray charge and the wad passes detonating cord to the head fuse and the ring of the atomizing charge, the range of the shot is regulated on the sub-caliber tube and the angle of aiming the mortar, the time of initiation of the atomizing charges is controlled by a pyrotechnic retarder. 2. Fire extinguishing mortar mine according to claim 1, characterized in that for cone-shaped spraying, oriented downward, at least one annular spray charge is placed in the conical sector of the above-caliber part; when the spray charges are initiated at a given height above the target, a downward-oriented, cone-shaped fire extinguishing charge is created gas-droplet or gas-powder vortex, when hitting an obstacle, the spray charges are initiated by a detonating cord from the head fuse.

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