JPH10192433A - Method and device for spraying atomized particulates - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce atomized particulates for fire extinction of a sufficient target getting performance and in a sufficient spouted quantity without using a liquid feed pump. SOLUTION: Water is stored in a storage chamber 88 of a spray gun, followed by triggering, and the pressurized air in an air container is spouted to the water storage chamber 88 from air nozzles 86. Thereby the mixture of water and pressurized air is sprayed inward in the radiating direction from spray nozzles 78 to make collision in the center about the radiating direction so that atomized particulates are produced. The obtained particulates are spouted toward the origin emitting flames situated ahead.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for injecting atomized fine particles into an object such as a flame.

[0002]

2. Description of the Related Art A fire extinguishing method for injecting atomized fine particles of noncombustible liquid into a flame base is known. In the conventional method of spraying fired fine particles using fired fine particles of non-combustible liquid, a pressurized liquid is generated by spraying a pressurized liquid from a nozzle.
No. 80 and JP-A-52-34597).

[0003]

In the conventional atomized fine particle jetting method, a pump for liquid pressure feeding and a cylinder for pressurized liquid are required to generate a pressurized liquid, and a sufficient amount of non-combustible liquid is required. It is difficult to inject the atomized fine particles at high speed to the flame source, and the reach of the atomized fine particles is also short.

An object of the present invention is to provide a method and an apparatus for spraying atomized fine particles which can overcome the above-mentioned problems.

[0005]

According to the method for spraying atomized fine particles of the present invention, the following steps (a) to (d) are provided. (A) Liquid is stored in a liquid storage chamber (88) having a predetermined volume. (B) The compressed gas is injected from the air nozzle (86) into the liquid storage chamber (88). (C) The mixture of the liquid and the compressed gas in the liquid storage chamber (88) is extruded toward the mixture injection nozzle (78) and injected from the mixture injection nozzle (78). (D) While generating atomized fine particles by injection from the mixture injection nozzle (78), the atomized fine particles are injected to the target.

[0006] This atomized fine particle injection method is not limited to fire extinguishing, but can be applied to all types of atomized fine particle injection methods such as spraying a control solution.

[0007] With the injection of the compressed gas from the air nozzle (86) to the liquid storage chamber (88), the pressure in the liquid storage chamber (88) increases, and a mixture of the liquid and the compressed gas in the liquid storage chamber (88). But,
The mixture is ejected to the mixture ejection nozzle (78) and ejected from the mixture ejection nozzle (78) to generate atomized fine particles. The atomized fine particles are pushed forward by the atomized fine particles from later,
Reach the target at high speed. In this atomized fine particle injection method, a pump for generating a pressurized liquid can be omitted.

According to another method of spraying atomized fine particles of the present invention, the mixtures from a plurality of mixture spray nozzles (78) arranged circumferentially toward the center in the radial direction collide with each other at the center in the radial direction. To produce atomized fine particles.

The jets of the mixture of liquid and compressed gas from each mixture injection nozzle (78) collide at the radial center of the circumferential array of mixture injection nozzles (78) and produce atomized particulates.

[0010] The atomized fine particle injection device (10) of the present invention has the following elements (a) to (d). (A) a liquid storage chamber (88) having a predetermined volume for storing liquid; (b) an air nozzle (86) facing the liquid storage chamber (88); (c) a liquid storage chamber (88) provided at the front end of the liquid storage chamber (88). 8
8) A mixture injection nozzle (78) that injects a mixture of the liquid and the compressed gas that is extruded from the nozzle and generates atomized fine particles. (D) Controls the connection between the compressed gas source (18) and the air nozzle (86). Manual on-off valve (114)

When the manual on-off valve (114) is opened, compressed gas is injected from the air nozzle (86) into the liquid storage chamber (88), the pressure in the liquid storage chamber (88) increases, and a mixture of the liquid and the compressed gas is formed. Is extruded toward the mixture ejection nozzle (78) and is ejected from the mixture ejection nozzle (78). Thereby, atomized fine particles are generated. The atomized fine particles are used, for example, for extinguishing or controlling fire. In the case of fire extinguishing, the atomized fine particles of a non-combustible liquid are sprayed to a flame base or the like.

According to another atomizing fine particle injection device (10) of the present invention, a front opening recess (80) that opens forward is provided.
The mixture injection nozzle (78) has a front opening recess (8) so that the jets therefrom collide with each other to generate atomized fine particles.
0).

The mixture of liquid and compressed gas from each mixture injection nozzle (78) impinges at a radial center,
Since the atomized fine particles are generated, the atomized fine particles can be efficiently generated.

According to another atomizing particulate ejecting apparatus of the present invention, the air nozzle (86) is provided at a plurality of locations in the longitudinal direction of the liquid storage chamber (88).

Since the air nozzles (86) are distributed in the longitudinal direction of the liquid storage chamber (88), a predetermined amount of compressed gas can be injected into the liquid storage chamber (88) at a high speed.

According to another atomizing particulate ejecting apparatus of the present invention, the air nozzles (86) are arranged at a plurality of positions in the circumferential direction of the liquid storage chamber (88).

Since the air nozzles (86) are distributed in the circumferential direction of the liquid storage chamber (88), a predetermined amount of compressed gas can be injected into the liquid storage chamber (88) at high speed.

According to another atomizing fine particle injection device of the present invention, the air nozzle (86) is directed obliquely outward in the radial direction.

Since the compressed gas from the air nozzle (86) is injected obliquely forward into the liquid storage chamber (88), the liquid storage chamber (88)
The liquid inside is efficiently extruded toward the front mixture injection nozzle (78), and the generation efficiency of atomized fine particles can be increased.

According to another atomizing fine particle injection device of the present invention, a compressed gas cylinder (18) as a compressed gas source (18) and a liquid tank (16) for storing a liquid to be introduced into a liquid storage chamber (88).
Means a liquid storage chamber (88), a mixture injection nozzle (78), and a manual on-off valve
(114) is provided on a hand-held part (14) that is gripped by an operator.

The operator carries the back portion (12) and holds the hand-held portion.
(14), grasping the object, approaching the manual on-off valve (114)
Is operated to control the injection of the atomized fine particles to the object.
This atomizing fine particle injection device can exert sufficient power in a place where a vehicle cannot access.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a configuration diagram of a fire-extinguishing backpack type atomized fine particle injection device 10. A fire-fighting backpack type atomized fine particle injection device 10 includes a backpack 12 that is carried on the back of the worker,
A spray gun 14 held by both hands of the operator. A shoulder band may be attached to the injection gun 14, and may be hung from a worker's shoulder. The backpack 12 is equipped with a water tank 16 capable of storing a predetermined amount of water and a compressed air cylinder 18 filled with pressurized air. The compressed air cylinder 18 is connected to a high-pressure regulator 22 through a high-pressure cock 20. Connected to
The pressure gauge 24 is connected to the discharge side of the high-pressure regulator 22,
The pressure on the discharge side of the high-pressure regulator 22 is displayed. The discharge side of the high-pressure regulator 22 branches into a supply air hose 26 and a return air hose 28, and the return air hose 28 is connected to a water tank.
A low-pressure regulator 30 is provided on the way to the upper part of 16. The injection gun 14 has a barrel 32, and a rear grip 34 and a front grip 36 which are attached at various positions on the rear end side and the front end side of the barrel 32, respectively. The rear grip 34 is equipped with a trigger 38. The water hose 40 is connected to the water tank 16
Is connected to the opening / closing cock 42.
Is manually operated to control the amount of water introduced into the barrel 32 of the injection gun 14 from the water hose 40.

FIG. 1 is a diagram showing the internal structure of the barrel 32. At the rear end of the cylindrical case 50, a rear mounting member 52 is mounted. The plug 54 is screwed to the rear end of the rear mounting member 52, closes the rear end opening of the rear mounting member 52, and defines an air introduction chamber 55 with the rear mounting member 52. Air inlet
56 is formed on the end wall of the plug 54, and the valve seat 58 is provided on the front end side of the rear mounting member 52. The spring seat 60 is fixed to the front end surface of the rear mounting member 52 by a bolt 62. Valve 64
The rear mounting member 52 and the spring seat together with the compression coil spring 68
A discharge valve as a check valve is disposed in the valve chamber between the valve seat 60 and the valve seat 58 and is pressed by the compression coil spring 68 against the valve seat 58.
Make up 70. A total of four through-holes 66 are formed in the peripheral wall of the valve body 64 to communicate the inside and outside of the valve body 64. Front end mounting member
Numeral 72 is attached to the front end of the cylindrical case 50, and defines a front-facing injection port 74 inside. The nozzle member 76 is fitted and fixed on the inner peripheral side of the front end mounting member 72, and the spray port 80 is formed as a recess having a front end opened to the front surface of the nozzle member 76, and communicates with the rear end of the injection port 74. I have. The plurality of spray nozzles 78 are arranged in the circumferential direction at equal angular intervals in the circumferential direction.
The nozzle member 76 extends in the radial direction, and connects the outer periphery of the nozzle member 76 and the inside of the spray port 80 at the back of the spray port 80 to each other.

The central tube 82 is a cylindrical case inside the cylindrical case 50.
50 extends along the center line of 50 and is connected at both ends to the spring seat 60 and the nozzle member 76, respectively, and at the rear end to the spring seat
It is connected to 60. Abacus ball-shaped bulges 84
Are fitted and fixed to the center tube 82 at regular intervals in the direction in which the center tube 82 extends. The longitudinal section of each bulging portion 84 is a symmetrical shape having a taper portion of equal angle on both sides in the axial direction, and the angle of this taper is equal to the angle of the longitudinal section of the front end taper portion of the spring seat 60, and the center line Is set to, for example, 30 to 45 °. A plurality of air nozzles 86 are formed in the front end tapered portion of the spring seat 60 and the front tapered portion of each bulging portion 84 at equal angular intervals in the circumferential direction at equal inclination angles with respect to the center line of the center pipe 82. And extends radially outward and diagonally forward to provide a spring seat.
The inside of 60 or the inside of the central pipe 82 is communicated with a water storage chamber 88 in the cylindrical case 50. The volume of the water storage chamber 88 is, for example, 1 liter.

FIG. 2 is a structural diagram of an improved example of the front end of the barrel 32 of FIG. In the barrel 32, the annular slide valve 90 is axially slidably fitted between the rear peripheral portion of the nozzle member 76 and the cylindrical case 50, and is urged rearward by the compression coil spring 94. The inner peripheral side is in contact with the step portion 92 of the nozzle member 76. The through-hole 96 is formed in the peripheral wall of the nozzle member 76, and the space in which the compression coil spring 94 is provided
Communication.

FIG. 3 is an internal structural view of the rear grip 34. The trigger 38 is rotatably supported by the rear grip 34 at a fulcrum 102 at the upper end, and the hose side connection port 104 and the barrel side connection port 106 are respectively provided at the lower rear end and the upper front end of the rear grip 34. And are connected to each other through a passage in the rear grip 34 and connected to the supply air hose 26 (FIG. 4) and the air inlet 56 (FIG. 1), respectively. The valve seat 110 is disposed in a passage in the rear grip 34 that interconnects the hose side connection port 104 and the barrel side connection port 106, and the ball 114 is compressed by a compression coil spring 108.
Pressed to 110. The rod 112 can be abutted against the trigger 38 and the water tank 16 at both ends, respectively, and is displaced toward the ball 114 as the operator pulls the trigger 38 to resist the urging force of the compression coil spring 108. Ball 114
From the valve seat 110.

The operation of the fire extinguisher type atomizing fine particle injection device 10 will be described. The operator carries the backpack 12 and holds the rear grip 34 and the front grip 36 of the injection gun 14 with the left and right hands. First, the open / close cock 42 is opened. Water in the water tank 16, which is pumped by compressed air supplied from the compressed air cylinder 18 through the air hose 28, is introduced into the water storage chamber 88 of the injection gun 14 via the water hose 40. The operator holds the barrel 32 at an angle so that the front end is slightly higher than the rear end, and knows that the water has almost filled the water storage chamber 88 due to a small amount of water leaking from the injection port 74. Can be. In the barrel 32 of FIG. 2, since the annular slide valve 90 closes the spray nozzle 78, it is not possible to know from the leakage of water to the injection port 74 that the water is filled in the water storage chamber 88. 42 is opened for a predetermined time, and a predetermined amount of water is
It is enough if introduced inside. After the water is filled or introduced into the water storage chamber 88 in a predetermined amount, the open / close cock 42 is closed.

Next, the operator pulls the trigger 38 with the injection port 74 of the injection gun 14 toward the flame base. As a result, the ball 114 built in the rear grip 34 separates from the valve seat 110, and the pressurized air in the compressed air cylinder 18 flows through the supply air hose 26 and the passage in the rear grip 34 to the rear end of the barrel 32. The air is supplied to the air introduction chamber 55. As a result, the pressure in the air introduction chamber 55 increases, the discharge valve 70 opens, and the pressurized air
Of the spring seat 60 and the central pipe
Into the water storage chamber 88 from each air nozzle 86 obliquely outward in the radial direction toward the outside, mixes with the water in the water storage chamber 88, and pushes the water in the water storage chamber 88 forward. . In the barrel 32 of FIG. 2, the annular slide valve 90 moves forward against the urging force of the compression coil spring 94 due to an increase in the pressure of the water storage chamber 88 due to the injection of pressurized air from the air nozzle 86, and The radially outer open end of the nozzle 78 is opened.

By increasing the pressure in the water storage chamber 88 and injecting the pressurized air obliquely forward, a mixture of water and pressurized air is ejected radially inward from the plurality of nozzle members 76, and
The jets from 76 collide at the center in the radial direction, and atomized fine particles (= spray) of water are generated. The time from the injection time of the pressurized air from the air nozzle 86 to the time when almost all the water in the water storage chamber 88 is injected from the spray nozzle 78 and changes to atomized fine particles is about several tens msec.

The atomized fine particles of water generated in the spray port 80 are sprayed by the atomized fine particles generated one after another.
80 is pushed forward and injected at high speed from the injection port 74 toward the front flame base.

In the embodiment of the present invention, the backpack type atomized fine particle injection device 10 for fire extinguishing is described.
In place of water as a non-combustible liquid, other liquids such as a control liquid can be stored and used as a backpack control apparatus. Also,
Instead of the backpack type, it is also possible to use the water tank 16, the compressed air cylinder 18, the injection gun 14, and the like mounted on a traveling vehicle.

[Brief description of the drawings]

FIG. 1 is an internal structural view of a barrel.

FIG. 2 is a structural diagram of an improved example of a front end of the barrel of FIG. 1;

FIG. 3 is an internal structural view of a rear grip.

FIG. 4 is a configuration diagram of a fire extinguisher type atomizing fine particle injection device.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 Fire-extinguishing type atomizing fine particle injection device (atomizing fine particle injection device) 12 Backpack portion 14 Injection gun (hand-held portion) 16 Water tank (liquid tank) 18 Compressed air cylinder (compressed gas cylinder) 18 Compressed air cylinder (compressed gas source) 78 Spray nozzle (mixture spray nozzle) 80 Spray port (front opening recess) 86 Air nozzle 88 Water storage chamber (liquid storage chamber) 114 Ball (manual on-off valve)

Claims (8)

[Claims] (1) A liquid is stored in a liquid storage chamber (88) having a predetermined volume, and (b) an air nozzle (86) is used to store the liquid.
And (c) injecting the compressed gas into the liquid storage chamber (88).
Mixture of liquid and compressed gas in the mixture injection nozzle (78)
And ejecting the mixture from the mixture ejection nozzle (78), and (d) ejecting the atomized particles to an object while generating atomized particles by the ejection from the mixture ejection nozzle (78). A method for spraying atomized fine particles, characterized in that: 2. Atomized fine particles are generated by causing a mixture from a plurality of mixture injection nozzles (78) circumferentially arranged toward a radial center to collide with each other at a radial center. The method for spraying atomized fine particles according to claim 1. 3. A liquid storage chamber (88) having a predetermined volume for storing liquid, and (b) an air nozzle facing the liquid storage chamber (88).
(86), (c) a mixture provided at the front end of the liquid storage chamber (88) and ejecting a mixture of the liquid and the compressed gas pushed out from the liquid storage chamber (88) to generate atomized fine particles. An atomizing fine particle injection device comprising: an injection nozzle (78); and (d) a manual open / close valve (114) for controlling connection between the compressed gas source (18) and the air nozzle (86). 4. A front opening recess (80) which opens forward, and said mixture injection nozzle (78) is so arranged that jets therefrom collide with each other to generate atomized fine particles. 4. The atomizing fine particle injection device according to claim 3, wherein the opening is formed in a peripheral portion of the front opening recess (80). 5. The air nozzle (86) is provided in the liquid storage chamber.
5. The atomized fine particle injection device according to claim 3, wherein the device is disposed at a plurality of locations in the longitudinal direction of (88). 6. The air nozzle (86) is provided in the liquid storage chamber.
The atomized fine particle injection device according to any one of claims 3 to 5, wherein the device is arranged at a plurality of locations in the circumferential direction of (88). 7. The air nozzle (86) is directed obliquely outward in a radially outward direction.
The atomized fine particle injection device according to any one of the above. A compressed gas cylinder (18) serving as the compressed gas source (18) and a liquid tank (16) for storing a liquid to be introduced into the liquid storage chamber (88) are provided on a backrest part carried by an operator. (1
2), wherein the liquid storage chamber (88), the mixture injection nozzle (78), and the manual open / close valve (114) are provided in a hand-held unit (14) gripped by an operator. The atomized fine particle injection device according to any one of claims 3 to 7, wherein: