JP4676602B2 - Wide area foam head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radiant foam head that is installed in an indoor parking lot, a dangerous goods facility, or the like and is extinguished by foam radiation and extinguishing with foam radiation while maintaining the same foaming characteristics as an existing foam head. And it aims to expand the fire protection range.
[0002]
[Prior art]
As a conventionally known foam head for emitting a fire extinguishing liquid, the one shown in FIG. 7 is generally known. This is a foam head main body 1 having a discharge port 3 in the center and a plurality of air intake ports 2 formed in the peripheral portion of the supply pipe to which a fire extinguishing agent aqueous solution is pumped. The foam head main body 1 is attached to the inside of a flange 4 formed on the outer peripheral edge of the foam head body 1 and has a bowl-shaped foam net 5 having a horizontal deflector 6 in the middle portion, and is arranged on the radiation side. Has a so-called open structure in which it is always open and radiates as it is when the foam-extinguishing solution is pumped.
[0003]
Accordingly, the fire extinguisher aqueous solution radiated from the discharge port 3 of the foam head body 1 collides with the deflector 6 and scatters around, and the fire extinguisher aqueous solution surrounds the deflector 6 while entraining the air taken in from the intake port 2. The foam of the fire extinguisher aqueous solution is uniformly radiated in all directions below the horizontal from the side radiation direction to diagonally downward and directly below the foaming net 5 that passes through the mesh. ing.
[0004]
[Problems to be solved by the invention]
That is, in the foam fire extinguishing equipment, a fire extinguishing agent aqueous solution in which a certain ratio of fire extinguishing agent is mixed with water is sent to the foam head through the supply pipe, and this is radiated in a state where the foam head is foamed in the foam net part. There is a need to. In order to sufficiently foam the aqueous fire extinguisher solution, there has been no choice but to use the foaming net 5 shown in FIG.
[0005]
[Means for Solving the Problems]
Therefore, in the present invention, to improve the structure of the conventional foam head described above, to develop a wide-area radiating foam head that expands the fire protection range while maintaining the same high foaming characteristics as the existing foam head. The invention of claim 1, which is attached to a supply pipe for a fire-extinguishing agent aqueous solution to be pumped, extends radially from the extinguishing agent aqueous solution introduction portion and the leading end of the introduction portion , A head body composed of a circular horizontal portion in which a plurality of air inlets are formed at appropriate intervals in a direction; a bowl-shaped deflector attached to the outer peripheral edge of the horizontal portion of the head body; and the head inside the deflector It consists of a doughnut-shaped intermediate plate with a circular window formed in the central part, which is interposed between the horizontal part of the main body with a certain distance, and the deflector has a central part between the intermediate plate and the intermediate plate. In It is characterized in that a horizontal reflecting portion is formed at a constant interval, and a large number of elongated slits that are continuous in the vertical direction from the upper side to the bottom side of the bowl-shaped rising side surface are formed at equal intervals in the circumferential direction. It relates to a wide area radiating bubble head.
[0007]
Furthermore, the invention according to claim 2 is directed to the flow direction of a plurality of extinguishing agent aqueous solutions directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution in the extinguishing agent aqueous solution introduction portion of the head body. The wide-area radiating bubble head according to claim 1 , wherein an adjustment introduction path is formed.
[0008]
Furthermore, the invention according to claim 3 is that the extinguishing agent aqueous solution introduction part of the head main body has a plurality of extinguishing agent aqueous solution introduction paths directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution. The wide-area radiating bubble head according to claim 1 , wherein a flow direction adjusting piece formed with is fitted.
[0012]
In the above configuration, when a fire occurs, the sensing head is activated by the heat, and by opening the simultaneous release valve, the aqueous fire extinguisher solution is directed toward the wide-area radiant foam head installed at the location of the fire through the supply pipe. Pump.
[0013]
The extinguishing agent aqueous solution enters the wide-area radiating bubble head from the supply pipe, enters from the entrance side of the extinguishing agent aqueous solution introduction portion toward the mixing chamber at the tip, and enters the outside air from the intake port formed near the leading end of the extinguishing agent aqueous solution introduction portion. While passing through the circular window of the intermediate plate while entraining and foaming, it hits the horizontal reflecting part of the deflector vigorously and bounces outward in the radial direction, hits the lower surface of the intermediate plate, and sets the radiation velocity vector of the aqueous solution. Forced to change horizontally.
[0014]
In this case, in the case where a mixing chamber is formed in the extinguishing agent aqueous solution introduction portion, which is gradually expanded in a tapered shape at an inclination angle of 1 to 4 degrees from the entrance side to the exit side of the extinguishing agent aqueous solution, When the aqueous solution passes through the extinguishing agent aqueous solution introduction portion, the vicinity of the side wall surface of the mixing chamber becomes negative pressure, and it becomes easier to entrain the outside air from the surrounding intake port, and the foaming efficiency can be improved.
[0015]
In addition, the fire extinguishing agent aqueous solution introduction portion of the head body is formed with a plurality of extinguishing agent aqueous flow direction adjusting introduction paths that are directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution. In this case, when the aqueous fire extinguisher solution passes through the flow direction adjusting introduction path, it is possible to promote further particle formation by causing a plurality of water streams to collide with each other, and the angle at which the reflecting part of the deflector hits the acute angle. Thus, the collision between the water streams is increased to further reduce the particle size, which makes it easier to entrain air and increase the foaming efficiency.
[0016]
Further, the fire extinguishing agent aqueous solution whose direction is changed to the horizontal direction reaches the slit formed on the rising side of the deflector while drawing the air in the air space between the intermediate plate and the head body, and passes through the slit. Further, the bubbles are radiated from the slits in the horizontal radiation direction with vigorous foaming.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the specific contents of the present invention will be described based on the embodiments shown in FIGS. 1 to 6. Reference numeral 11 denotes a head body, 17 denotes an intermediate plate, and 21 denotes a bowl-shaped deflector. As shown in detail in FIG. 3, the head main body 11 has a male threaded portion 12 a provided on the outer peripheral surface, and the fire extinguisher is mounted by screwing it into a fire-extinguishing agent aqueous solution supply pipe (not shown). The aqueous solution introducing part 12 and the circular horizontal part 15 extending radially outward from the tip of the extinguishing agent aqueous solution introduction part 12 are provided.
[0018]
Furthermore, the extinguishing agent aqueous solution introduction part 12 has an internal hollow mixing chamber 13 which is located near the horizontal part 15 and has one side (tip side) opened, and the entrance side of the extinguishing agent aqueous solution introduction part 12, that is, the extinguishing agent aqueous solution. Three flow direction adjusting introduction passages 14 leading from the introduction base end to the mixing chamber 13 on the outlet side are formed at equal intervals, and the introduction passages 14 are mixed from the introduction base portion of the above-mentioned extinguishing agent aqueous solution. Toward the chamber 13, formed so as to be centripetally oriented toward each other so as to gradually move toward each other as the mixing chamber 13 is approached. Thus, it enters the mixing chamber 13. In addition, about the part of the introduction path 14 for the above-described three or a plurality of flow direction adjustments, it is set as a separate flow direction adjustment piece so as to be fitted in a recess (not shown) of the extinguishing agent aqueous solution introduction part 12 formed in advance by excavation. Also good.
[0019]
Further, the mixing chamber 13 has a side wall surface tapered at a constant inclination angle (set to 2 degrees in the embodiment of FIG. 3) from the entry side to the exit side following the connection point with the introduction path 14 described above. The shape is gradually expanded.
[0020]
In addition, about the expansion angle of the mixing chamber 13 in this case, when it is specifically less than 1 degree | times, the entrainment of the air from the inlet 16 mentioned later with respect to the fire-extinguishing agent aqueous solution which flows in is not seen, and conversely 4 Exceeding the limit causes no negative pressure between the inflowing fire extinguisher aqueous solution and the side wall surface of the introduction portion, so 4 degrees is the limit, and the expansion taper angle must be within the range of 1 to 4 degrees. There is.
[0021]
Further, a plurality of air inlets 16 are formed in the circular horizontal portion 15 at equal intervals in the circumferential direction, whereby the extinguishing agent aqueous solution introduced from the extinguishing agent aqueous solution introducing unit 12 is used for three flow direction adjustments. Air that has flowed into the mixing chamber 13 through the introduction path 14 while being in contact with each other, and that has been sucked in while promoting the intake from the intake port 16 by making the portion along the side wall surface gradually expanding toward the outlet side negative pressure Mix well to foam. In the figure, reference numeral 15a denotes a claw portion formed downward along the outer peripheral edge of the horizontal portion 15.
[0022]
As shown in FIGS. 4 to 5, the intermediate plate 17 has a donut shape having a circular window 18 in the center, and rises upward by the rising portion 19 of the outer peripheral edge, and further outwards at the rising upper end. As shown in FIG. 1, the flange 20 is attached between the opening edge of the deflector 21 described later and the inside of the claw 15 a of the horizontal portion 15.
[0023]
As shown in FIGS. 1 and 6, the bowl-shaped deflector 21 is formed in a bowl shape so as to be attached to the outer peripheral edge of the horizontal portion 15 of the head main body 11, and at the center thereof. The rising portion 22 forms a reflection portion 23 positioned at a height that allows a certain distance from the intermediate plate 17, and the vertical direction from the upper side of the bowl-shaped rising side surface to the bottom surface direction. A large number of elongated slits 26 that are continuous with each other are formed at equal intervals in the circumferential direction. Reference numeral 25 denotes a plurality of pressure release ports for relaxing the pressure increase inside the deflector 21 due to foaming of the extinguishing agent aqueous solution, which is formed around the reflection portion 23 formed at the center of the deflector 21, and 24 is bent outward. Represents the flange part.
[0024]
In the above configuration, the intermediate plate 17 is positioned below the horizontal portion 15 of the head main body 11 with the flange 20 facing upward, and further, the deflector 21 is positioned below the flange 24 and the flange 24 is facing upward. 24 is positioned so as to be superposed on the lower surface of the flange 20 of the intermediate plate 17, and is integrally assembled by caulking the inner side by the claw portion 15a of the horizontal portion 15 in the head body 11 (see FIG. 1). ).
[0025]
In this state, when a fire occurs in the foam radiation area, the sensing head is actuated by the heat, and the wide-area radiation foam in which the fire extinguisher aqueous solution is installed at the fire occurrence site through the supply pipe by opening the simultaneous release valve. Pumped toward the head.
[0026]
Further, the extinguishing agent aqueous solution enters the head main body 11 of the wide-area radiating bubble head from the supply pipe, enters from the entrance side of the extinguishing agent aqueous solution introduction unit 12 toward the mixing chamber 13 on the exit side, and enters the extinguishing agent aqueous solution introduction unit 12. Passing through the circular window 18 of the intermediate plate 17 while blowing outside air from the intake port 16 formed near the front end and foaming it, it strikes the reflecting portion 23 of the deflector 21 vigorously and bounces outward in the radial direction. When hitting the lower surface of the reflector 17, the radiation velocity vector obliquely upward of the extinguishing agent aqueous solution can be forcibly changed in the horizontal direction.
[0027]
In addition, the mixing chamber 13 is provided in the head body 11 as described above, and the side wall surface of the mixing chamber 13 has a taper shape with an inclination angle of 1 to 4 degrees from the entrance side to the exit side of the extinguishing agent aqueous solution. Since the fire extinguishing agent aqueous solution passes through the fire extinguishing agent aqueous solution introduction part 12, a negative pressure is generated between the side wall surface and the outside air from the surrounding inlet 16 is more easily involved, The foaming efficiency can be improved.
[0028]
Further, in this case, a flow direction adjusting introduction of a plurality of extinguishing agent aqueous solutions oriented in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution into the extinguishing agent aqueous solution introduction portion 12 of the head body 11. Since the path 14 is formed, a force is applied in a direction in which a plurality of water streams collide with each other when the fire extinguisher aqueous solution passes through the flow direction adjusting introduction path 14, thereby further granulating the fire extinguisher aqueous solution. In addition, the angle hitting the reflecting portion 23 of the deflector 21 can be made acute to increase the collision between water streams to further reduce the particle size, thereby making it easier to entrain air and increasing the foaming efficiency. .
[0029]
Further, the extinguishing agent aqueous solution whose direction is changed to the horizontal outside reaches the slit 26 formed on the rising side surface of the deflector 21 while drawing air in the air space between the intermediate plate 17 and the horizontal portion 15 of the head body 11. When passing through the slit 26, the bubbles are further emitted from the slit 26 toward the horizontal radiation direction while foaming further. In addition, when the aqueous fire extinguisher solution is emitted, a plurality of pressure release ports 25 are formed around the reflecting portion 23 formed at the center of the deflector 21 to alleviate the pressure rise inside the deflector 21 due to foaming of the fire extinguisher aqueous solution. The pressure rise due to foaming in the deflector 21 when the extinguishing agent aqueous solution is emitted is alleviated.
[0030]
【The invention's effect】
As described above, the present invention is attached to the supply pipe of the extinguishing agent aqueous solution to be pumped , and extends radially from the extinguishing agent aqueous solution introducing portion and the leading end of the introducing portion, and at a plurality of intervals in the circumferential direction. Between the head body consisting of a circular horizontal portion with an air inlet, a bowl-shaped deflector attached to the outer peripheral edge of the horizontal portion of the head body, and the horizontal portion of the head body inside the deflector consists in where mediated through a certain distance, the donut-shaped intermediate plate having a circular window in the center, the deflector over a certain distance between the intermediate plate to the central portion Since a horizontal reflecting portion is formed and a large number of elongated slits are formed at regular intervals in the circumferential direction from the upper side to the bottom of the bowl-shaped rising side surface, the foam head In addition, while maintaining the same foaming characteristics as existing foam heads, the fire protection range can be further expanded, resulting in a reduction in the number of foam head installation locations and cost reductions in equipment construction. Is possible.
[0031]
Further, the extinguishing agent aqueous solution introduction part of the head main body is formed with a mixing chamber that is gradually expanded in a tapered shape at an inclination angle of 1 to 4 degrees from the entrance side to the exit side of the extinguishing agent aqueous solution. When the aqueous solution passes through the mixing chamber, a negative pressure is generated between the tapered wall surface, and at the same time, more air can be sucked and taken in from the intake port, so that the foaming efficiency is remarkably improved.
[0032]
Furthermore, a plurality of extinguishing agent aqueous flow direction adjusting passages are formed in the extinguishing agent aqueous solution introduction portion of the head main body so as to be directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution. Therefore, the radial direction of the extinguishing agent aqueous solution is forcibly changed to the centripetal direction, so that the stirring performance with the intake air is remarkably improved.
[0033]
In this case, when forming a plurality of extinguishing agent aqueous solution introduction paths directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution with respect to the head body in this case, this part is a separate part, In a recess formed in the head body as a flow direction adjustment piece formed with a plurality of extinguishing agent aqueous solution introduction paths directed in the centripetal direction from the inlet side to the outlet side (mixing chamber) direction of the extinguishing agent aqueous solution When fitted in, the formation of the fire-extinguishing agent aqueous solution introduction path becomes even easier.
[0034]
Furthermore, around the reflective part formed in the center of the deflector, there are a number of pressure relief ports that ease the pressure rise inside the deflector due to foaming of the extinguishing agent aqueous solution. The pressure increase due to foaming can be alleviated and the foaming performance can be further improved. In addition, since a doughnut-shaped intermediate plate is installed in the bowl-shaped deflector, the extinguishing agent aqueous solution that collided with the deflecting part of the deflector hits the lower surface of the intermediate plate and changes the scattering direction obliquely upward to the horizontal direction. As a result, the radiation area of the extinguishing agent can be greatly expanded.
[Brief description of the drawings]
FIG. 1 is a half-cut longitudinal sectional view of a wide-area radiating foam head according to an embodiment of the present invention.
FIG. 2 is a plan view of a head body in the wide-area radiating bubble head of FIG.
3 is a longitudinal sectional view taken along line AA in FIG.
FIG. 4 is a plan view of a reflecting plate.
5 is a longitudinal sectional view taken along line BB in FIG. 4. FIG.
6 is a bottom view of a deflector in the wide-area radiating bubble head of FIG. 1. FIG.
FIG. 7 is a longitudinal sectional view of a conventionally known fire-extinguishing foam head.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Head main body 12 Fire extinguisher aqueous solution introduction part 12a Male thread part 13 Mixing chamber 14 Introduction path 15 Horizontal part 15a Nail | claw part 16 Inlet port 17 Intermediate | middle plate 18 Circular window 19 Standing part 20 Flange 21 Deflector 22 Standing part 23 Reflecting part 24 Flange 25 Pressure release port 26 Slit

Claims (3)

A fire extinguishing agent aqueous solution introduction part, which is attached to a supply pipe of a fire extinguishing agent aqueous solution to be pumped , and a circular shape extending radially outward from the leading end of the introduction part and having a plurality of air inlets formed at appropriate intervals in the circumferential direction A head body composed of a horizontal part of the head part, a bowl-shaped deflector attached to the outer peripheral edge of the horizontal part of the head body, and a fixed gap between the horizontal part of the head body inside the deflector. It consists of a doughnut-shaped intermediate plate with a circular window formed at the center, and a deflector is formed with a horizontal reflector at a certain distance between the intermediate plate and the intermediate plate. In addition, a wide-area radiating bubble head is formed by forming a large number of elongated slits that are continuous in the vertical direction from the upper side to the bottom side of the bowl-shaped rising side surface at equal intervals in the circumferential direction. The fire extinguishing agent aqueous solution introduction part of the head body is formed with a plurality of extinguishing agent aqueous flow direction adjusting introduction paths directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution. The wide-area radiating bubble head according to claim 1 . The head body has an extinguishing agent aqueous solution introduction section having a flow direction adjusting piece formed with a plurality of extinguishing agent aqueous solution introduction paths directed in the centripetal direction from the entrance side to the exit side (mixing chamber) direction of the extinguishing agent aqueous solution. The wide-area radiating foam head according to claim 1 , which is fitted.

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