SU1695947A1 - Method of fire suppression with water - Google Patents

Abstract

The invention relates to fire suppression mainly with water and can be applied in extinguishing fires in livestock and poultry farms. The aim of the invention is to increase the efficiency of fire extinguishing. The goal is achieved by the fact that on the fire center the moving water curtains are fed crosswise with the formation of local closed zones between them. The invention can be used in the national economy in the protection of objects from fire. 5 il.

Description

The invention relates to fire fighting mainly with water and can be used for extinguishing fires both at industrial facilities and at livestock and poultry farms.

The known method of extinguishing fires with water, including the formation of water curtains and their supply to the site of fire.

There is also known a method of extinguishing fires with water, in which water curtains position one relative to another at a distance that provides for the formation of vapor-air zones between them.

There is also known a method of extinguishing fires with water, in which the dispersion of water curtains is variable, decreasing towards the center of the fire.

A disadvantage of the known methods of extinguishing fires is the possibility of ventilating (blowing) the space between water curtains by ascending (convection) air flows, i.e. destruction of vapor-air zones, which provide a decrease in the concentration of oxygen in the localized area between water curtains.

The aim of the invention is to increase the efficiency of fire extinguishing.

Water curtains located one relative to another at a distance ensuring the formation of vapor-air zones between them are fed to the fire center cross-wise with the formation of local closed zones of the processed site of the fire site. When supplying water curtains to a fire center, local closed zones of the area being treated cross.

Such closed local zones are closed on all sides and, as a result, ventilation (blowing) out of them is excluded. Thus, the fire extinguishing effect is achieved due to the formation of local closed zones of the area being treated that is resistant to ventilation of the vapor-air zones.

Water curtains should be supplied crosswise from a single curtain airforming device. At the same time, water curtains of one and second directions are not

ABOUT

you ate about VJ

destroy one another. If we supply water curtains from two different trunks to the same area of the fire, then water curtains of one direction (from one trunk) are destroyed by water curtains of the other direction (from another trunk).

The feed water curtains cross crosswise along the front of the fire, thereby increasing the area to be treated. Due to the presence of several water curtains in each direction, the number of closed local zones can be determined from the expression

N (a-1) (b-1),

where a and b are the number of water curtains in one and another direction.

The number of water curtains in each direction determines the number of closed local zones. With an increase in the number of water curtains in each of the directions, the security of the whole area of the source of fire increases.

If the number of water curtains is four in each direction, i.e. when u 4, nine closed local zones are formed, and in the center of this area a zone of increased security is formed, which is protected around the same zone and separated from the outside by several water curtains (in this case two). The number of water curtains with and is the minimum number when an enhanced security zone is already formed.

The number of zones of increased security with an increase in the number of water curtains in each direction increases and when their number is equal to nine, but the zone located in the center of these nine zones represents a zone of double enhanced security. This zone is separated from the outside by three water curtains around and a double ring of vapor-air zones. With a further increase in the number of water curtains in each direction, zones of heightened protection of higher orders may appear.

Figure 1 is a diagram illustrating the method of extinguishing a fire with water; in figure 2

- layout of local closed zones when water curtains are supplied according to the scheme

4x4, i.e., in FIG. 3 - the same, when supplying water curtains according to the 5x5 scheme; figure 4

the same, when supplying water curtains according to the 6x6 scheme; Figure 5 - the same, when supplying water curtains according to the 7x7 scheme.

The diagram (Fig. 1) shows the center of fire 1, the water curtains 2 and 3 fed to the center of fire crosswise, and the resulting

between the water curtains 2 and 3 are closed local zones 4. The arrow indicates the direction of movement of the water curtains 2 and 3, fed crosswise along the front of the source 1

the fire. Zone 5 is the treated area of the fire.

On the location schemes of local closed zones when supplying water curtains according to 4x4, 5x5 and 6x6 schemes (Fig.2-4) i.e. when

0, and, zones 6 of increased security are shown. The latter are separated from the outer side by a ring of vapor-air zones and two water curtains.

5 When the water curtains are supplied according to the 4x4 scheme (FIG. 2), one zone 6 of enhanced security is formed, and when the water curtains are supplied according to the 5x5 scheme, four zones 6 of enhanced security (FIG. 3) are formed.

0 When the water curtains are supplied according to the 6x6 scheme, there are already nine nine zones 6 of increased security, one of which (zone 7), located in the center, is a zone of double increased security. Zone

5 7 is a zone of double heightened security, since, in contrast to zone 6, it is separated from the outside by three water curtains around and a double ring of vapor-air zones.

0 The first and only zone 7 can appear when the minimum number of water curtains in each direction is equal. With an increase in the number of water curtains in each direction greater than 6 in per p5 from the zone of increased protection of higher orders. For example, with the 7x7 water curtain supply scheme, the number of double security zones is four (figure 5).

0 The method is carried out as follows.

Water curtains 2 and 3 are cross-fed from a single curtain-forming device to the burning surface. Innings

5 water curtains 2 and 3 cross-contribute to the formation of local closed zones 4, which are protected from the outside by at least one water curtain. Local closed areas 4 more stable

0 against ventilating (blowing) them with upward air currents.

The increased stability of local closed zones 4 contributes to a more stable localization of the combustion areas, these zones 4 better protect the combustion areas from the access of the oxidant (oxygen) from the outside. Thus, the supply of water curtains 2 and 3 cross improves the fire extinguishing efficiency. The resulting zones 6 and 7 of enhanced protection create in the central part of the zones that are being formed the areas of the processed focus of fire with the highest suppression of the flame of the seat of fire, since penetration of the oxidant (oxygen) from the outside is practically excluded from these areas.

When moving water curtains 2 and 3 along the front of the fire center 1, an increase in the treated area 5 of the fire site 1 fire occurs. Due to the presence of several water curtains in each direction, N local closed zones are formed, providing multiple irrigation of the hearth in a single pass. Processing of the fire can be carried out for several passes.

The application of the proposed method of extinguishing a fire with water provides cooling of the burning surface, stable insulation of the combustible zone from the treated area. Much less time is required to eliminate the burning.

Claims (1)

Invention Formula The method of extinguishing a fire with water, including the formation of water curtains moving along the front of the fire source, characterized in that, in order to increase the efficiency of fire extinguishing, water the curtains are fed to the fire center crosswise with the formation of local closed zones of the treated area of the fire site.  2 2 figl fig 2 figl FIG.  fie-5