JP2002035156A - Fire-extinguishing apparatus with carbon dioxide gas dissolving water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems in which recently, to decrease loss of water, drained-off waterdrops are made fine and fire-extinguishing is performed with an appropriate amount of water but as the waterdrops carries the surrounding air with them, cutting- off of the air (oxygen) is not well performed and in addition, in the case when a forest fire in which close fire extinguishing activity is hardly performed occurs, it is necessary that a large amount of water drainage and scattering of a fire- extinguishing agent are performed from a long distance. SOLUTION: Carbon dioxide is dissolved in water in advance under a high pressure and it is stored in a tank and it is drained by means of a pump. In the case when a fire fighting installation of a type in which water is drawn from the outside and is drained off is used, a carbon dioxide gas-dissolved water is prepared by providing a gas blowing pipe in a water draining pipe and is drained. As carbon dioxide is carried with the fine waterdrops in the case of the fine waterdrops, it is effective for cutting-off of oxygen. Ice or ice in which carbon dioxide gas is dissolved is shot into a specified place by means of a launcher such as a gun and a missile. As the ice takes latent heat of fusion away from the surroundings when it is liquified, the effect of cooling is also utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002]

[Prior art]

A fire extinguishing system uses water or a fire extinguisher to cool a flame portion and shut off oxygen. A water extinguishing system is mainly for cooling, and a chemical digester is mainly for shutting off oxygen. Water fire extinguishing systems are most commonly used in fire trucks and fire hydrants. Chemical fire extinguishers are used for special fires in which water cannot be used to extinguish oil fires or the like.Foam extinguishing is well known, and foams such as carbon dioxide, nitrogen, and argon are created with chemicals and the like. There are many types that cover.

[0004] Conventional fire extinguishing systems can be broadly divided into water extinguishing systems and chemical extinguishing systems. Furthermore, the water fire extinguishing system can be divided into two, the first is an external water supply type used when there is a large water supply source such as a river or a water supply, and the second is a water tank mounted on a car Water tank transport type. In each case, water is absorbed and pressurized by a mounted pump, and water is discharged from a nozzle. The small type is called a portable type, and there is also a type in which an engine and a pump are integrated and the first is reduced in size so that a person can carry it.

[0005] In recent years, water-fire extinguishing systems have been mainly used in the form of mist-like water sprays in order to reduce the amount of water used and the surrounding water wetting due to fire extinguishing, that is, to reduce damage caused by water damage. A fire hydrant is provided inside or around a large building, and water is discharged using water pressure or tap water pressure due to a head drop from a water tank placed on the roof. Also in this case, an atomizing mechanism is provided at the tip of the water discharge nozzle.

[0006] In order to give a water-extinguishing device a function of chemical fire-extinguishing, a method of injecting a chemical solution and enclosing the surrounding air with a thin film made of the chemical and water to form bubbles has also been put to practical use. In this type of chemical digester, similar to a water fire extinguisher, the surrounding air is wrapped with a thin film made of water and chemicals to create bubbles, so the air is conveyed to the vicinity of the flame section. Oxygen promotes combustion.

[0007] When the area is not close to a fire site such as a forest fire, it is difficult to discharge water or spray a digestive agent, and the fire extinguishing activity is limited to the removal of surrounding combustibles.

[Problems to be solved by the invention]

When extinguishing a fire with a water fire extinguisher, if a large amount of water is discharged, the temperature of the flame and the combustion material can be reduced to a temperature lower than the ignition point, that is, the fire can be extinguished by cooling. And the like.

[0009] In the case of using the atomized spray which is considered to save water and reduce water loss, the supply of oxygen is reversed in order to entrain a large amount of air around and carry it near the fire. Will do.

[0010] Some of the products having the function of extinguishing a foam have been designed to reduce the entrapment of air. However, since a large amount of a drug or the like is injected, the cost is increased and the drug is damaged. .

[0011] It is necessary to pour a large amount of water or a fire extinguisher from a point distant from the fire site.

[Means for Solving the Problems]

Carbon dioxide is known to dissolve easily and in large quantities in water (see FIG. 6). Carbon dioxide is dissolved in water used for fire extinguishing. The dissolved carbon dioxide gas is
It may be gas or liquid.

In the above-mentioned water tank transport type, water in which carbon dioxide gas is dissolved is prepared in advance and transported in a water tank. The amount of carbon dioxide dissolved in water is proportional to the pressure. Make the water tank pressure resistant as needed.

In the above-mentioned external water supply type, a carbon dioxide gas injection pipe is provided in the middle of a pipe to inject carbon dioxide into water.

In the above-mentioned external water supply type, a space for holding high-pressure carbon dioxide gas is provided in the middle of the pipeline, water is sprayed, and water in which the carbon dioxide gas is dissolved is taken out from the lower part of the space and used for water discharge.

The amount of gas dissolved in water per unit time is considered to be proportional to the contact area speed of gas and water when the pressure and temperature are kept constant. That is, considering the case where bubbles of a certain size move in water, the contact time area is the product of the surface area and the speed of the bubbles. When moving at a high speed, the contact area speed is large and the amount of dissolution is also large. Also, considering the contact area speed per unit weight, it is effective to blow fine bubbles into water or blow fine water droplets into gas to increase the contact area.

From a point distant from the fire site, a large amount of water or water in which carbon dioxide is dissolved is used to form frozen ice and then put into the fire site. The loading means is loaded by using a launch device such as a cannon or a missile, which is transported by car or airplane.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows the configuration of the first embodiment. After the gas sent from the gas tank (300) through the gas pipe (301) is dissolved in the water sent to the gas dissolution tank (400) by the water supply pump (500), the gas dissolved water is dissolved in the gas dissolved water pipe (401). And into the water tank (100) through the connection (402). There are two methods of gas dissolving: a method of blowing a pressurized gas into water, a method of filling a tank with a pressurized gas, blowing water, and taking out gas-dissolved water collected in a lower portion of a gas dissolving tank (400). Can also be used. Water pipe (201) from water tank (100)
Then, the water is sucked into the water discharge pump (200), and after being pressurized, sent to the water discharge pipe (210).

Embodiment 2 is shown in FIG. In the second embodiment, a gas dissolving pipe (310) is provided in a part of the water discharge pipe (210) to dissolve the gas in continuously flowing water. The gas is sent from the gas cylinder (300) through the gas line (301) to the gas dissolving tube (310).

FIG. 3 shows a detailed example 1 of the gas dissolving tube (310) of the second embodiment. The gas is sent from the inlet pipe (301) to the gas dissolving pipe (310) in the water discharge pipe (210), and is jetted into the water from the side jet port (311) and the front jet port (312). The area of the side jet port (311) and the front jet port (312) and the area between the water discharge pipe (210) and the gas dissolving pipe (310) are set so as to increase the contact time area.

A detailed example 2 of the gas dissolving tube (310) of the embodiment 2 is shown. Gas is blown into water from a front nozzle (315) provided at the center of the front wall of the gas dissolving pipe (310). In this example, when a high-pressure gas is blown into water, the area of the ejection port is reduced, and the gas is atomized.
The front nozzle (315) is provided with a small number of ejection ports as small as possible.

FIG. 5 shows the structure of the third embodiment. Water absorption pipe (2
01), water is sucked in, the pressure is increased by a pump (200), and fine water droplets passing through a discharge pipe (202) are blown into a gas dissolving chamber (600) filled with a high-pressure gas to dissolve the gas into the water droplets. Let it. The water in which the gas has been dissolved is guided to an outlet pipe (210) from an outlet (601) provided in the lower part of the gas dissolving chamber (600).

FIGS. 8 and 9 show the structure of the fourth embodiment. Missile-like flight fire bomb (700) formed into a shape with low air resistance using ice that is water or water in which gas is dissolved and frozen.
Then fire it with a cannon and throw it into the fire scene. The flying fire extinguisher (700) is composed of a head (710) made of ice and a propulsion unit (750), and the propulsion unit (750) functions to receive propulsion from the launching device. Launching device (800)
Is composed of a barrel (810) and an angle adjusting device (820), and a thrust is generated inside the barrel. A barrel (810) with a trolley (830) and front wheels (840) and rear wheels (850)
Is transported.

【The invention's effect】

As shown in FIG. 6, the amount of carbon dioxide dissolved in water decreases as the temperature of the water increases, and increases in proportion to the pressure. The amount of carbon dioxide dissolved at a temperature of 20 C and a pressure of 10 atm is about 9 liters per liter of water. When the water pressurized by the pump (200) is discharged, the pressure becomes 1 atm. Therefore, the amount of carbon dioxide dissolved in 1 liter of water becomes 1.5 liters. Will be released. At this time, water is also easily atomized.

The periphery of the water droplet is surrounded by carbon dioxide gas, and the water is discharged into the flame with the carbon dioxide gas. In addition to cooling by water droplets, oxygen is shut off by carbon dioxide gas accompanying the water droplets, effectively extinguishing the fire.

When the carbon dioxide gas flows out of the gas cylinder, it is in a liquid state and is gasified by pressure release and heat input. However, since the heat input from the periphery is restricted by the amount of heat held by the periphery and the temperature difference, May not be gasified. In the water discharge pipe (210), the liquid is kept in a liquid state, and after the water is discharged, the liquid is miniaturized and absorbed into the surrounding heat to be gasified, thereby performing cooling and oxygen cutoff.

In the fourth embodiment, a relatively large amount of ice can be continuously supplied even if the vehicle is far from the fire site. When carbon dioxide is dissolved in 1 liter of water at 100 atm (see FIG. 7), about 150 liters of carbon dioxide is dissolved. If it is frozen in this state when it is frozen in this state, carbon dioxide gas is released, effectively working to extinguish the fire.

[Brief description of the drawings]

[0028]

Fig. 1: Gas dissolving device and gas dissolving water tank used for water tank transfer type

[0029]

Fig. 2: Gas dissolution pipeline used for external water supply type

[0030]

FIG. 3: Gas dissolving tube having jet ports on the side and front surfaces of Example 2.

[0031]

FIG. 4: Gas dissolving tube having a jet port on the front surface of Example 2.

[0032]

FIG. 5: Fire extinguisher for gas-dissolved water that blows fine water droplets into high-pressure gas atmosphere

[0033]

Fig. 6: Dissolution amount of carbon dioxide gas in water Fig. 6 is a diagram showing the amount (liter) of gas dissolved in 1 liter of water with pressure on the horizontal axis, using the temperature of water and gas as parameters. . The amount of gas dissolved in water depends on the temperature,
It increases in proportion to the pressure.

[0034]

FIG. 7: Dissolution amount of carbon dioxide gas in water

[0035]

Fig. 8: Fire extinguishing bomb formed with ice

[0036]

Fig. 9: Fire extinguishing bomb launcher formed of ice

[Explanation of symbols]

100: Water tank 101: Water tank water level 200: Water discharge pump 201: Water suction pipe 202: Discharge pipe 210: Water discharge pipe 300: Gas cylinder 301: Gas pipe 310: Gas dissolving pipe 311: Side gas jet port 312: Front gas Jet port 313: Inlet pipe 315: Front nozzle 400: Gas dissolving tank 401: Gas dissolving water pipe 402: Connection section 500: Water supply pump 600: Gas dissolving chamber 601: Exit 700: Flight fire fighting bomb 710: Head 750: Propulsion section 800 : Launching device 810: Gun barrel 820: Angle adjusting device 830: Dolly 840: Front wheel 850: Rear wheel

In the above description, carbon dioxide was used as the gas and water was mainly used as the liquid. However, the present invention is non-flammable and non-flammable as a substitute for gas and water, and is used for cooling the flame part or for cooling. The present invention can also be applied to a combination of a gas and a liquid that functions effectively for extinguishing fire, such as shielding oxygen, combustible gas and substances.

As for the flight fire-extinguishing munitions, the description of the technology employed in rockets and shells, such as the installation of horizontal and vertical tail fins, the launching device of the catapult system, etc. is omitted.

Claims (5)

[Claims] 1. A fire extinguishing system wherein a liquid in which a gas is dissolved under high pressure stored in a tank is pressurized by a pump and discharged. 2. A fire extinguishing system wherein a pressurized gas is blown into a liquid from an injection pipe provided in the water discharge pipe when the liquid pressurized by the pump passes through the water discharge pipe. 3. A fire extinguishing system which is provided in the middle of a water discharge pipe through which a liquid pressurized by a pump passes, discharges water from the water discharge pipe to a gas dissolution tank filled with high-pressure gas, and discharges water at the bottom of the gas dissolution tank. 4. A fire extinguishing system for throwing ice formed by freezing water or dissolved carbon dioxide gas into a fire spot. 5. The fire extinguisher according to claim 4, wherein the formed ice is thrown into a fire spot using a firing device.