JP2002272871A - Method for extinguishing fire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fire extinguishing method for suppressing the amount of CO2 gas as much as possible by forming fluid foams with CO2 gas inside in the initial stage of a discharge time so as to rapidly arrive at a planar fire source without being scattered by flames since the foams are heavier than air, cover a floor surface, effectively use a small amount of CO2 gas for extinguishing fire in a short time and increase a fire extinguishing effect, forming the firm foams with IG55 gas inside in the succeeding stage so as to permit the foams to be heaped and broken to enclose the flames of the fire source in an upper part from a lower part and so as to effectively supply IG55 gas from the lower part to the base part of the flames and extinguish fire and, then, performing discharge by change-over into IG55 gas. SOLUTION: The combination of fire extinguishing gas with a foamed fire extinguishing agent is obtained by changing the formation of the foams, i.e., the fuild foams with CO2 gas inside in the early stage of the discharge time and the firm foams with IG55 gas inside in the succeeding stage within the discharge time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing method in which a fire extinguishing gas is put into a foam and discharged.

[0002]

In a conventional fire extinguishing method of this type, a foam in which a combination of a fire extinguishing gas and a foam extinguishing agent is released is released. It covers the surface quickly and approaches the fire source quickly, but the foam is heavy and does not accumulate. Therefore, the fire extinguishing effect is not obtained for the upper fire source. As a result, there is a problem that it takes a long time to extinguish the fire because the approach to the flat fire source is delayed.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is intended to form a fluid bubble containing CO2 gas at an early stage of the discharge time. As a result, bubbles heavier than air can quickly approach a flat fire without being scattered by the flame, cover the floor surface, effectively use a small amount of CO2 gas to extinguish the fire in a short time, and increase the fire extinguishing effect. By forming lumpy bubbles containing IG55 gas, the bubbles are stacked and ruptured so as to wrap around the upper part of the flame in the flame from below, and the IG55 gas has an effect on the base of the flame from below. The CO2 gas amount can be reduced as much as possible by extinguishing and extinguishing the fire and switching to IG55 gas for emission.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
FIG. 2 will be described. FIG. 1 is a graph showing a fire extinguishing method, and FIG. 2 is a schematic diagram of a fire extinguishing system used to execute the fire extinguishing method of FIG.

In the figure, 1 is a foaming device, 2 is a gas supply pipe for supplying a fire extinguishing gas to the foaming device 1, 3 is a CO2 gas cylinder, 4 is a starting device A of a CO2 gas cylinder 3, 5 is an IG55 gas cylinder, 6 is an IG55 gas cylinder. The starting devices B and 7 of the IG55 gas cylinder 5 are foam supply pipes for supplying foam to the foamer 1, 8 is a mixer, 9 is a water pump, 10 is a water tank, and 11 is fluid foam. A, 12 is a valve A, 12 is a valve A, 13 is a foam solution storage tank B, which forms a stiff foam, 14 is a valve B, 15 is each starting device A4, B6, water pump 9, and The control panel controls the valves A12 and B14.

[0006] When a fire occurs, in the initial stage of the discharge time (about 20 seconds), the control panel 15 activates the activation device A4 and the CO2 gas in the CO2 gas cylinder 3 is sent from the gas supply pipe 2 to the foamer 1. At the same time, the control panel 15 drives the water supply pump 9, opens the valve A12, and the foam aqueous solution forming the fluid foam by the mixer 8 is mixed with the water and sent to the foamer 1. From 1 a fluid bubble containing CO2 gas is released.

In a subsequent stage following this release, C
After the gas amount in the O2 gas cylinder 3 has been exhausted in about 20 seconds, the control panel 15 activates the activation device B6 to activate the IG5.
At the same time as the IG55 gas of the gas cylinder 5 is sent from the gas supply pipe 2 to the foamer 1, the control panel 15 controls the valve A
The valve is switched from the valve 12 to the valve B14, and the foam aqueous solution which forms a stiff foam by the mixer 8 is mixed with water to form the foamer 1
Is blown out from the foamer 1, and the foam with the IG55 gas is discharged from the foamer 1.

As described above, in the initial stage of the release time, CO 2
(2) Since a fluid bubble containing gas is released, the bubble is heavier than air, so it quickly approaches a flat fire source without being scattered by a flame and covers a floor surface in a short time, and a small amount of C is discharged.
The fire was extinguished with O2 gas, and I
The waisted foam containing the G55 gas is released, and the foam is stacked and ruptured so as to wrap in the flame from below with respect to the upper fire source, and the IG55 gas is effectively applied from below to the base of the flame. Supplied to extinguish fire.

[0009]

As described above, according to the present invention, at the initial stage of the release time, fluid bubbles containing CO2 gas are formed, so that bubbles heavier than air are not scattered by the flame and are flat. As it approaches the fire source quickly and covers the floor surface, a small amount of CO2 gas can be effectively used to extinguish the fire in a short time and the fire extinguishing effect increases, and in the subsequent stage, a lumpy foam containing IG55 gas is formed. Bubbles are piled up and ruptured so as to envelop the flame from below with respect to the upper fire source, so that IG55 gas can be effectively supplied from below to the base of the flame to extinguish the fire and switch to IG55 gas to emit CO2 gas. The effect that the gas amount can be reduced as much as possible is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram of a fire extinguishing system used to perform the fire extinguishing method of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foamer 2 Gas supply pipe 3 CO2 gas cylinder 4 Starter A 5 IG55 gas cylinder 6 Starter B 7 Foam fire extinguishing agent supply pipe 8 Mixer 9 Water pump 10 Water tank 11 Storage tank A 12 Valve A 13 Storage tank B 14 Valve B 15 Control panel

Claims (1)

[Claims] An extinguishing gas is put into a foam and released, and a combination of the extinguishing gas and the foam is released within the release time, and a fluid containing CO2 gas is used in the initial stage of the release time. A fire extinguishing method characterized by changing so as to form a foam having a shape, and in a subsequent stage, to form a firm foam containing IG55 gas.