SU1741818A1 - Fire extinguishing method - Google Patents

Abstract

The invention relates to fire suppression and can be used for remote extinguishing of various types of underground and land fires. The purpose of the invention is to increase the efficiency of quenching. The method involves feeding a fire extinguishing agent into the source from a stack of trunks as a result of the impact on the charges established in them. The fire extinguishing composition is delivered simultaneously or with a delay of 0 to 30 with a group of trunks whose centers are located on the same line or form geometric shapes that are symmetrical to one of the symmetry planes of the package of trunks. The charges in the trunks within the groups have the same mass and may be different between the groups. Fire extinguishing compositions in different groups of trunks may be different. 3 hp, f-ly, 1 tab.

Description

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The invention relates to fire suppression and is intended for remote extinguishing (burning surfaces of liquids) gas and oil fountains, forest ground fires, liquid and solid combustible materials in ground and underground conditions.

The aim of the invention is to increase quenching efficiency.

The goal is achieved by the fact that the method including feeding the fire extinguishing composition from the barrel package as a result of affecting the charges established in them, provides for an assessment of the nature of the fire, the results of which set the flow parameters of the fire extinguishing composition and determine the mode of its flow from the barrels.

The fire extinguishing composition is delivered simultaneously or with a delay of 1-10 with a group of trunks whose centers are located on the same line or form geometrical figures symmetrical with respect to one of the symmetry planes of the package of trunks, and the charges in the trunks inside the groups have the same mass and can be different between groups. Fire extinguishing compositions in different groups may be different.

Assessing the nature of the fire, setting the flow parameters (flow range, its configuration, density, etc.) allow you to determine the mode of supplying the fire extinguishing composition (simultaneously or with delay) to the fire site for each particular service.

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thus increasing the effectiveness of fire extinguishing and expanding the field of application of the method, using it to extinguish both point and area fires (see table).

The method is carried out as follows.

The nature of the fire and its geometrical dimensions are visually assessed, taking into account the type of combustible materials, the intensity and time of free burning, the front, distance to the fire, the direction and force of the wind for ground fires and the direction and speed of the air flow for underground fires.

Based on the visual assessment and objective data, the installation location is determined, i.e. the range of the fire extinguishing composition, the area covered, the configuration of the flow, and hence the mode of the composition. The delivery of the composition can be carried out simultaneously or with a delay, the delay time being in the range of 1-10 ° C s. Fire extinguishing compositions in groups of trunks can be different if necessary, the complex effect on the fire, in particular to prevent re-ignition. It is determined exactly which formulations will be used during extinguishing (powder, water, frother solution, their combination, feeding sequence).

After the delivery mode of the selected fire extinguishing agent has been established, a multilateral fire extinguishing installation is placed at the required distance from the fire source and is charged. A cartridge with a charge, such as a detonating explosive, and a container with fire extinguishing agent are placed in each barrel of the installation.

At the muzzle of the barrel, there are stops that prevent the container from flying out (fired), and at the ground part there are contacts that are in contact with the contacts on the cartridge.

After charging all the trunks in the package, the initiation system is turned on and in accordance with the specified mode, the fire extinguishing composition from the groups of trunks is supplied,

When applying fire extinguishing compositions with a delay of 1-10 6-3-10 with two or more groups of trunks, a fire extinguishing stream of the required configuration is formed due to the aerodynamic interaction of gas-powder streams of groups of trunks. When reducing the delay time to less than 1-10 seconds, the feed approaches the salvo and provides the maximum flow range. The supply of fire extinguishing compositions with a delay of up to 3-10 seconds between groups of trunks allows for multiple cover of the fire (impact on the fire) and use different fire-extinguishing compositions for different groups of trunks.

When using different fire extinguishing compositions, the delay time is chosen taking into account the time of interaction of the fire extinguishing composition of the previous group of barrels with the fire source.

With a decrease in the delay time between groups of trunks less than the fire extinguishing compositions do not have time to influence the source of combustion, with an increase of more than 3.10 s, re-ignition occurs.

Example. In order to create a stream with a front of m and a range of up to 40 m (for extinguishing - the stacking of wooden boxes) in the 8-barrel package of barrels, the following order of supplying the fire extinguishing powder is carried out. Group 1 - trunks Ms 6-8; 2- group-trunks number 1-5. The mass of charges in the groups is the same and is equal to 150 g. For - between groups of trunks

holding MO 6-10 2c.

Claims (4)

1. The method of extinguishing fires, including the supply to the fire of the composition of the package of trunks, characterized in that, in order to increase the efficiency of extinguishing, a preliminary assessment of the nature of the fire is carried out, depending on the nature of the fire, the parameters of the fire extinguishing composition are set, and the composition is supplied with a delay of 0 to 30 seconds with a group of trunks. 2. A method according to claim 1, characterized in that the charges in at least one of the groups of barrels have masses different from those of the other groups, 3. A method according to claim 1, characterized in that the charges in the trunks within the groups have the same mass. 4. A method according to claim 1, characterized in that the extinguishing agents in different groups are different.