SU1712245A1 - Method of fire extinguishing - Google Patents

Abstract

The invention relates to fire suppression, mainly forest fire, with the use of existing aircraft v > & aviation technology. The purpose of the inventions is to increase the efficiency of fire extinguishers. The goal is achieved by pre-cooling the extinguishing fluid to a negative temperature of 56.5 < ° C < O. Celsius and fundamentally. Having thrown it together with the container into the seat of fire, it is crushed into small droplets, which disperse and they bombard the burning surfaces. The fire extinguishing fluid is cooled in fire extinguishing bombs on the suspension: it is blown by frosty air during flight at altitudes above 2500 m. The crushing of the fire extinguishing fluid and the dispersal of droplets are produced in the hearth by an explosion. 1 hp f-ly, 1 yl.

Description

The invention relates to fire suppression, primarily forest fire, and can be used for the emergency termination of a fire covering vast forest spaces.

The aim of the invention is to improve the efficiency of fire extinguishing, especially extensive forestry, using existing aircraft and aircraft technology.

This goal is achieved by pre-cooling the extinguishing liquid to a negative temperature (Celsius) within -56.5), keeping it in the liquid phase, then this liquid is crushed into many fine droplets (g, which are accelerated to high speeds). on the order of tens of meters per second, and burning surfaces are fired at by these flying drops.

The pr (proposed fire extinguishing method is carried out with the help of a new fire extinguishing device: with the help of a new special purpose bombshell - extinguishing aerial bombs (SAR), a new extinguishing feature is fire extinguishing equipment.

This goal is also achieved by cooling the fire extinguishing fluid directly into the air bombs it has equipped by blowing it out with atmospheric cold air (at a typical Celsius temperature) during the flight of the aircraft with these fire extinguishers to the fire site.

hO flight altitudes above 2500 m (according to standard atmosphere).

go

Crushing fire extinguishing fluid and

4ib. the dispersal of the drops was made in the fire center of the joint venture by an explosion of a fire extinguishing air bomb.

As an extinguishing fluid, for example, an aqueous solution of NaCl salt — sodium chloride is used, in a concentration of the order of 15-30%, which can be cooled in the liquid phase to a negative temperature (Celsius).

The drawing shows the device.

As an analogue of the device for implementing the proposed method, an aviation bomb is adopted, comprising a housing 1 with a suspension system 2 and a stabilizer 3, a charge of an explosive (BB) 4, a fuse or a fuse device 5 and a gear 6. corresponding to the purpose of the bomb, pour in, for example, through pipe 7. For example, the incendiary air bomb {ZAB) - an incendiary or fire bomb is intended to attack such ground targets as structures, combat vehicles, etc.

After the fire extinguishing tank is suspended on a bomb plane of a combat aircraft (or helicopter), it is inserted (into the socket of a phosphorus cartridge) —a charge of explosive (BB) 4 with a fuse or fuse device 5, for example, as in the BZ contact (impact) cocked with loss of contact when reset.

The effectiveness of a fire extinguishing cover of a forest area covered by a fire with such a tank can be considered commensurate with the known effectiveness of covering the area with the incendiary effect of the BZ tank. but. obviously, with some correction factor, the value of which is determined by testing the extinguishing tank.

During the flight of the aircraft with fire extinguishing tanks on the inner cassette holders and on the outer girder holders to the fire site at altitudes above 2500 m in frosty air, the fire extinguishing solution in the tanks is cooled to a negative (Celsius) temperature (within -56. 0). for which, the bombshell doors are occasionally opened (for 10–20 s) and closed — specifically for cooling tanks with non-freezing fire extinguisher solution by blowing them with outside freezing air. The tanks on the outside points of the suspension are blown by the oncoming flow of cold air continuously.

When approaching the site of a fire, the aircraft lowers to a height most favorable for accurate bombing, and produces targeted shedding — like routine bombing on an area target of fire extinguishing tanks onto fires where fire extinguishing tanks are sprayed by these explosions, and the resulting sets of fine droplets, accelerated by the same explosions to high speeds of their expansion, fire on the burning surfaces in the fire and, thereby, suppress and extinguish the fire in the fire, covered with frosty wet fog and

large volumes of forest space covered by fire, thereby lowering the ambient temperature below the temperature threshold

ignite.

Using the proposed method of forest fire extinguishing (in accordance with the given example) provides significant advantages compared to

0 by known methods:

1 - when loading each aircraft with fire extinguishing tanks (copies of prototype ZB) (see drawing) in the amount of 22 pieces of 315 l of fire extinguishing fluid in each

A 5 squadron squadron of nine such aircraft can contribute 9. (22xZT5 l) 9x6930 62.370 l of fire extinguishing fluid in one run; squadrons can apply 62.370 liters of extinguishing fluid; thus, it is possible to achieve an excess of fire extinguishing power over the heat-emitting power of a forest fire (in the first run) and the fire can be urgently stopped;

5 2 - the effectiveness of a fire extinguishing effect on a fire also increases from cooling to a negative temperature of a large mass of extinguishing fluid, so that the distribution of this fluid to

0 large volumes of mist clouds and from high-speed liquid spraying (explosion) on burning surfaces, and from the subsequent increase in volumes of fog and vapor induced by bombs falling into

5 foci, with a general decrease in temperature (below the ignition threshold) in the entire burned space.

Energy for cooling large masses of extinguishing fluid is literally taken from atmospheric air without additional costs and the cooling time is rationally combined with the transport time.

Long-range aircraft are capable of extinguishing a forest fire anywhere in the country during a day or night with the help of a satellite fire detection system, preventing a large-scale forest fire from spreading.

0 The mobility of aviation fire extinguishing equipment at the same time becomes the highest.

Claims (2)

Claims 1. A fire extinguishing method, preferably forest-based, consisting in exposing a fire site to a liquid delivered to a fire site in containers. characterized in that, in order to increase the fire extinguishing efficiency, the fire extinguishing liquid is pre-cooled to a negative temperature, keeping it in the liquid phase, then the fire extinguishing is dispersed to high herd cattle and crushed into fine droplets. 2. The method according to claim 1, characterized by the fact that the liquid is dispersed and crushed into fine droplets by dropping it in a TOHKocteHHOM tank containing a charge, an explosive device, and cooled with atmospheric air in the process of delivering it to the fire center by the aircraft.