JPH10127805A - Extinguishing method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an extinguishing method and an extinguishing robot which enables efficiently extinguishing with a limited amount of water under a choking effect yielded with the shielding of outside air even when the interior of a vehicle is on fire covering a fire source such as vehicle tightly with a gel film without clogging a nozzle by mixing a water coagulant added to a jetting flow to gelatinize water or foam instantaneously. SOLUTION: In a robot body 1A which is provided with a water or foam injecting device for extinguishing able to run along a longitudinal moving path 2 on one sidewall in a tunnel, a water coagulant nozzle 11 is opened into a jet flow near an outlet of a water or foam jetting nozzle 8 to mix a water coagulant into water or foams for extinguishing jetted out of a robot 1 for extinguishing. Thus, a fire source is covered with a gelatinous film generated to accomplish extinguishing by a choking effect yielded with the cutting of the outside air.

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 and a fire extinguishing apparatus which are effective mainly for fires in vehicles such as tunnels and parking lots.

[0002]

2. Description of the Related Art In order to extinguish a fire such as a vehicle in a tunnel or a parking lot, a fire provided with a fire extinguishing head that can travel along a moving path and has a nozzle for jetting water or foam, for example. Robots are well known. Since a large amount of heat is generated in a vehicle fire or the like, an enormous amount of water is required to extinguish the fire. For this reason, it has been proposed to provide water supply joints at regular intervals on the tunnel side wall and to perform a fire extinguishing activity by receiving water required for fire extinguishing from these water supply joints.

[0003] However, a long tunnel requires a large number of water supply joints and long hose equipment, which increases equipment costs and other costs. In addition, there is a problem that it is difficult to extinguish the fire by delaying the initial fire extinguishing because the hose connection operation is required.

[0004] For example, if a fire extinguisher as disclosed in Japanese Patent Application Laid-Open No. 1-94872 is used, a small amount of water can be used to extinguish the fire, so that the facilities in the tunnel can be reduced without requiring a water supply joint or the like. This fire extinguishing agent is a fire extinguishing agent for an aqueous gel obtained by adding water to a water absorbent resin.

[0005]

The fire extinguishing agent is, for example, a starch-acrylic resin obtained by adding 500 times by weight of water and stirring to absorb the water. However, since a lump is easily formed, there is a possibility that nozzle clogging may occur when pumping is performed. Furthermore, this fire extinguishing method prevents evaporation of water and aims at the cooling effect, and does not extinguish the fire by the suffocation effect of shutting off the outside air, so a considerable amount of fire extinguisher is still required to extinguish the fire. I do.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a water-coagulant is added to a jet stream and mixed to instantaneously gel water or foam, so that a gel film can be formed without causing nozzle clogging. A fire extinguishing method and a fire extinguishing device that can cover a fire source such as a vehicle without gaps and efficiently extinguish a fire with a small amount of water by the choking effect of shutting off outside air even when the interior of the vehicle is burning. And

[0007]

Means for Solving the Problems The present invention has been made to achieve the above object, and the gist of the present invention is to provide a method for extinguishing water or bubbles jetted from a fire extinguisher to remove water or bubbles outside the fire extinguisher. A fire extinguishing method is characterized in that a coagulant is mixed, a fire source is covered with a gel-like coating formed, and the fire is extinguished by the suffocating effect of shutting off outside air.

Further, in the fire extinguisher main body provided with a fire extinguishing water or foam jetting device, a water coagulating agent nozzle capable of adding and mixing a water coagulating agent to the jet stream is provided near an outlet outside the jetting nozzle for fire extinguishing water or foam. A fire extinguisher characterized by being opened.

[0009]

FIG. 1 is a perspective view showing a fire extinguishing method according to an embodiment of the present invention, and FIG. 2 is a sectional view schematically showing a main part of a fire extinguishing robot according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a fire extinguishing robot that can travel along a moving path 2 in the front-rear direction via rolling wheels 3. Reference numeral 1A denotes a robot body in which a control device 4 is mounted, and a drive motor is started and stopped by an instruction from a control panel (not shown) provided on the ground or the like, and can reach a fire spot. 5 is a water supply tank, 6 is a water supply pump, 7 is a water supply pipe, 8 is a jet nozzle, 9 is a water coagulant tank, 10 is a water coagulant pump, and 11 is a water coagulant nozzle. The tip of the water coagulant nozzle 11 is bent downward, and opens near the outlet of the jet nozzle 8, that is, at the upper part of the outlet.

The operation of the above embodiment will be described. The robot body 1A that has reached the fire site stops at the position closest to the fire source. Immediately after receiving an instruction from the control panel, the water supply pump 6 is operated by the control device 4, and water is supplied from the water supply pipe 7 by the operation of the water supply pump 6, and can be discharged from the ejection nozzle 8. On the other hand, since the powder or liquid water coagulant is sprayed downward from the water coagulant nozzle 11 by the operation of the water coagulant pump 10, the water coagulant is added to and mixed with the jet stream, and water or foam is instantly gelled, The water or foam and the water coagulant that are supplied one after the other form a gel film to cover the fire source of the vehicle, etc., and even when the interior of the vehicle is burning, the fire can be efficiently extinguished with a small amount of water due to the choking effect of blocking the outside air. It can be carried out.

FIG. 3 shows another embodiment, and the same parts as those in FIG. 2 are denoted by the same reference numerals and description thereof will be omitted. In this example, the tip of the water supply pipe 7 is tapered, the upper end of the suction pipe 12 is opened at the tapered portion 7A, the lower end of the suction pipe 12 is positioned at the lower part in the foam liquid tank 13, and the air is ejected to the foam ejection nozzle 8. An inlet 14 is provided. The water coagulant nozzle 11 extends from the center of the jet nozzle 8.

Therefore, the water is supplied from the water supply pipe 7 by the operation of the water supply pump 6 and the flow velocity is increased when passing through the tapered portion 7A. Is discharged in a large amount. On the other hand, the water coagulant is uniformly added and mixed into the foam from the opening of the central water coagulant nozzle 11, and the foam and the water coagulant successively supplied form a foamy gel film. Even if the fire source of the vehicle or the like is covered without gaps and the interior of the vehicle is burning, the fire can be extinguished more efficiently with a smaller amount of water due to the choking effect of blocking the outside air.

As the moisture coagulant, known ones can be used, for example, a hydrolyzate of starch-acrylonitrile graft copolymer, cellulose-acrylic acid graft copolymer, polyacrylamide, crosslinked poval, crosslinked starch -Acrylamide graft copolymer,
Crosslinked starch-acrylic acid graft copolymers and the like can be used.

The time from the time of mixing with water to the time of coagulation is determined by the type of water coagulant. Therefore, it is preferable that the fire extinguishing robot measures the position up to the fire source and the fire situation, and optimally selects the type of water coagulant based on the measured data.

[0015] Moisture coagulants include liquid and powder. Powdered powders have the advantage of requiring less storage,
There is also the disadvantage that it takes time to mix with water and foam.

The point different from the conventional fire extinguishing method of injecting water or bubbles at a fire source is that the fire extinguishing method does not directly hit the fire, but above the fire source.
The point is that it sprays over a wide area. For this reason, it is preferable to use a wide-area spray nozzle or spray while oscillating.

In the embodiment shown in FIG. 3, it is preferable that nitrogen or fresh air can be supplied by a cylinder or the like in order to surely perform foaming.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Using the apparatus shown in FIG.
-100 liters of water and water coagulant tank 9 are filled with 10 liters of liquid coagulant, and foam stock solution tank 13 with 5 liters of foam stock solution, and each pump is started at a fire site to perform 100 liters for 1 minute. Water and one for this
The fire source was covered with a 0% moisture coagulant and a foamy gel coat. The fire was extinguished in 20 seconds. On the other hand, when the supply of water coagulant was stopped and the fire was extinguished, the fire could not be extinguished,
More foam was needed. In each of the above embodiments, the robot main body travels along the forward / backward moving path along one side wall in the tunnel. However, the robot may be of a trackless type. Further, in each of the above-described embodiments, an example is described in which the fire extinguishing device is a fire extinguishing robot that can travel, but the fire extinguishing device is not limited to this and may be a fixed type. Further, in the above-described embodiment, a tunnel has been described as an example of the fire protection target area. However, the fire protection target area is not limited to this, and may be a parking lot, a factory, or the like.

[0019]

According to the fire extinguishing method of the present invention, a water coagulant is mixed with the fire extinguishing water or foam injected from the fire extinguishing apparatus outside the fire extinguishing apparatus, and the fire source is covered with a gel-like coating formed. The fire is extinguished by the suffocation effect of shutting off the outside air, so the fire source such as the vehicle is covered without gaps by the gel coating, and even if the interior of the vehicle is burning, a small amount of water is sunk by the suffocation effect of the outside air cutoff The fire can be efficiently extinguished. In addition, since fire can be easily extinguished with a small amount of foam, a large number of water supply joints and long hose equipment are not required, and costs such as equipment costs can be reduced. Further, since the hose connection operation is not required, there is no delay in the initial fire extinguishing.

In the fire extinguisher according to the present invention, there is provided a fire extinguisher equipped with a fire extinguishing water or foam injection device, wherein a water coagulant can be added to and mixed with the jet stream near an outlet outside the jet nozzle for jetting fire extinguishing water or foam. Since the water coagulant nozzle is opened, the water coagulant is added to the jet stream and mixed, and water or bubbles are instantaneously gelled. Even if the fire source is covered without gaps and the interior of the vehicle is burning, the fire can be efficiently extinguished with a small amount of water due to the choking effect of blocking the outside air. Further, costs such as equipment costs can be reduced without requiring a large number of water supply joints and long hose equipment. Further, since the hose connection operation is not required, there is no delay in the initial fire extinguishing.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a fire extinguishing method according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a main part of a fire fighting robot according to one embodiment of the present invention.

FIG. 3 is a sectional view schematically showing a main part of a fire fighting robot according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire fighting robot 1A Robot main body 2 Moving path (monorail) 3 Rolling wheel 4 Control device 5 Water supply tank 6 Water supply pump 7 Water supply pipe 7A Tapered portion 8 Jet nozzle 9 Water coagulant tank 10 Water coagulant pump 11 Water coagulant nozzle 12 Suction pipe 13 Foam concentrate tank 14 Air inlet

Claims (4)

[Claims] 1. A fire-extinguishing water or foam injected from a fire extinguisher is mixed with a moisture coagulant outside the fire extinguisher, the fire source is covered by a gel-like film formed, and the fire is extinguished by the choking effect of shutting off outside air. Fire extinguishing method characterized by performing. 2. The fire extinguishing method according to claim 1, wherein the fire extinguishing device is a fire extinguishing robot. 3. A fire extinguisher body provided with a fire extinguishing water or foam injection device, wherein a water coagulant nozzle capable of adding and mixing a water coagulant to the jet stream is provided near an outlet outside the jet nozzle for jetting fire extinguishing water or foam. A fire extinguisher characterized by being opened. 4. The fire extinguishing method according to claim 3, wherein the fire extinguishing device is a fire extinguishing robot capable of traveling along a forward / backward moving path along one side wall in the tunnel.