JP3705997B2 - Fire fighting foam head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foam head used in a foam fire extinguishing equipment installed in indoor parking lots and dangerous goods facilities, etc., and by interposing a low melting point substance in the foam head, by melting the low melting point substance with fire heat. It is characterized by having both functions of fire detection and foam radiation by opening a valve accompanying the melting, and aims to simplify a conventional foam fire extinguishing equipment.
[0002]
[Prior art]
As a foam head for foam extinguishing liquid radiation for a conventionally known oil fire, the one shown in FIG. 6 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]
Therefore, 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]
That is, in a foam fire extinguishing equipment for extinguishing an oil fire, about 3 to 6% of a fire extinguishing agent is mixed with water and sent to a foam head through a supply pipe, and this is foamed at a foaming net portion of the foam head. It is necessary to radiate in the state. However, since the oil fire extinguishing foam head needs to be provided with a foaming function, there is only an open type structure that does not have a water stop means at the extinguishing liquid inlet as shown in FIG. When such an open-type foam head is used in an oil fire extinguishing system, a fire detection head with a water-stopping structure, or simultaneous opening to pump fire extinguishing liquid toward the foam head when a fire is detected Since it is necessary to separately provide a valve or the like, the entire foam fire extinguishing equipment is complicated and inevitably inevitably costly as described later. In this case, a closed type structure that does not have a foaming function, such as wood, used for general fire extinguishing (a structure in which the head itself has a water stop means in which a low melting point alloy is pressed against the water inlet). It cannot be diverted directly to oil fire extinguishing equipment. In this case, it is not technically easy to add a foaming function to a fire extinguishing head having a closed structure for general fires to obtain a foam head for oil fire extinguishing. Further, in the foam head having the foaming net 5 shown in FIG. 6, a valve having a low-melting-point alloy interposed between the fire extinguishing agent aqueous solution inlet of the main body and the vertical foaming net 5 having the deflector 6 is pressed. In addition, in order to obtain a so-called closed structure, the foaming net 5 alone is too deficient in durability, and therefore some reinforcing member needs to be provided outside the foaming net 5.
[0005]
However, in reality, when such a reinforcing member is provided, in the case of a foam head, the reinforcing member itself partially blocks foaming and foam emission, and as a result, the foamed foam is uniformly distributed around the periphery. Since radiation becomes extremely difficult, in a known foam head, a valve having a low-melting-point alloy interposed between the fire extinguishing agent aqueous solution inlet of the main body and the vertical foaming net 5 having the deflector 6 is pressed. Therefore, it was extremely difficult to make a so-called closed structure, and inevitably it had to be an open structure.
[0006]
[Problems to be solved by the invention]
However, in the foam fire extinguishing system, the structure of the foam head inevitably becomes an open structure for the above-described reason. Therefore, in addition to the foam head, a fire detection device is separately provided and the fire detection system is also provided. A simultaneous opening valve that is opened by the apparatus and a manual activation valve for manually opening the simultaneous opening valve are inevitably installed, and therefore, it is inevitable that the equipment configuration is complicated.
[0007]
[Means for Solving the Problems]
Therefore, in the present invention, the structure of the conventional foam head described above has been remarkably improved to be a closed type structure, thereby providing equipment such as a fire detection device and a simultaneous opening valve. In addition, the radiation distance of the foamed fire extinguisher aqueous solution foam is made longer than before, and the configuration of conventional foam fire extinguishing equipment for oil fire extinguishing can be simplified.
[0008]
That is, the present invention specifically includes a head main body including a fire extinguishing agent aqueous solution introduction portion to be attached to a supply pipe for a fire extinguisher aqueous solution to be pumped, and a circular horizontal portion extending radially outward from the leading end of the introduction portion. , A bowl-shaped deflector attached to the outer peripheral edge of the horizontal portion of the head body, and a circular window in the center of the deflector, which is coaxially interposed at a predetermined interval inside the deflector. A formed donut-shaped reflecting plate, and a valve body that is pressed into the opening on the outlet side of the extinguishing agent aqueous solution introduction section through a circular window of the reflecting plate and a low-melting-point substance interposed between the deflector and the deflector. A plurality of air inlets are formed in the circumferential direction in the vicinity of the leading end of the extinguishing agent aqueous solution introduction portion of the head body, and the deflector has an elongated slit that continues in the vertical direction from the upper side to the bottom. About a circumferential equal intervals multiple formed oil fire extinguishing foam head characterized by comprising for each.
[0009]
The present invention also provides a head main body comprising a fire extinguishing agent aqueous solution introduction portion attached to a supply pipe of a fire extinguisher aqueous solution to be pumped, a circular horizontal portion extending radially outward from the leading end of the introduction portion, and a horizontal portion of the head main body. A bowl-shaped deflector attached to the outer peripheral edge of the section, and a donut-shaped reflection in which a circular window is formed in the center of the deflector inside the deflector with a predetermined interval interposed therebetween The head body comprising a plate and a valve body penetrating the circular window of the reflecting plate and interposing a low-melting-point substance between the deflector and the opening on the outlet side of the extinguishing agent aqueous solution introduction portion. The exit side portion of the fire extinguishing agent aqueous solution introduction part is expanded in a tapered shape toward the exit side, and a plurality of intake ports are formed in the circumferential direction near the extinguishing liquid introduction part tip of the head body, The Flector relates to an oil fire extinguishing foam head characterized by comprising forming a number of slits elongated continuous longitudinally toward the bottom surface from the side above each circumferentially equal intervals.
[0010]
Further, in the present invention, at the position near the center of the bottom surface of the deflector described above, a plurality of pressure release ports for reducing the pressure increase inside the deflector due to foaming of the extinguishing agent aqueous solution are formed in the circumferential direction along the periphery of the window. Also related to the oil fire extinguishing foam head. Further, according to the present invention, there is provided an oil in which a flow direction adjusting piece in which a plurality of introduction paths directed in the centripetal direction are formed in the extinguishing agent aqueous solution introduction portion is formed from the inlet side toward the outlet side. Also related to fire fighting foam head.
[0011]
In the above configuration, when a fire occurs in the bubble radiation area, the low melting point alloy is melted by the hot air flow etc., and the valve body pressed against the opening on the outlet side of the extinguishing agent aqueous solution introduction part The release is released by the applied pressure, and the fire extinguishing agent aqueous solution flows through the extinguishing agent aqueous solution introduction portion. When the fire extinguisher aqueous solution is radiated through a plurality of introduction paths directed in the centripetal direction from the entry side to the exit side of the introduction part, the flow direction is forcibly changed to the centripetal direction, While improving the agitation performance with air and promoting the particle formation of the extinguishing agent aqueous solution, it hits the separated valve body, changes its direction to the side, and entrains the air sucked in from the intake port of the main body, and the circumferential direction of the deflector A large number of slits are formed at regular intervals, reaching a long and narrow slit extending from the upper side to the bottom of the side surface, and radiated outward while foaming when passing through the slit.
[0012]
In this case, when the fire extinguisher aqueous solution passes through the outlet portion that is expanded in a tapered shape on the outlet side portion of the extinguishing agent aqueous solution introduction portion, a negative pressure is generated between the tapered portion wall surface and the intake port at the same time. Therefore, the foaming performance is remarkably improved. In addition, inside the bowl-shaped deflector, a donut-shaped reflecting plate having a circular window formed in the center is disposed coaxially with a certain distance from the deflector. The fire extinguisher aqueous solution that collided hits the lower surface of the reflector, and the scattering direction of the fire extinguisher aqueous solution obliquely upward is changed to the horizontal direction.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the specific contents of the present invention will be described based on the embodiment shown in FIGS. 1 to 5. Reference numeral 11 denotes a head body, 20 denotes a bowl-shaped deflector, 27 denotes a valve body, and 28 denotes a reflector. . The head main body 11 is attached to a supply pipe (not shown) of the extinguishing agent aqueous solution to be pumped, and a circular horizontal portion extending radially outward from the tip of the extinguishing agent aqueous solution introducing portion 12 horizontally. It consists of thirteen.
[0014]
Moreover, the fire extinguishing agent aqueous solution introduction part 12 is hollow inside, and the flow direction adjusting piece P is fitted into this part. That is, the flow direction adjusting piece P is formed with a plurality of introduction paths 18 for adjusting the flow direction that are oriented in the centripetal direction from the entry side to the exit side of the extinguishing agent aqueous solution introduction part 12 in the fitted state. Thus, the fire extinguisher aqueous solution that has flowed in is given a bending in the rotational direction in the fire extinguisher aqueous solution introduction part 12, and the discharge direction is displaced in the centripetal direction to mix with intake air from the intake port 14 described later, and foaming To further improve the performance.
[0015]
When forming the plurality of introduction paths 18 for adjusting the flow direction with respect to the head main body 11, the head main body 11 is made non-hollow, and the plurality of introduction paths 18 for adjusting the flow direction are directly formed in the internal portion. Accordingly, the above-described flow direction adjusting piece can be eliminated.
[0016]
Further, a mixing chamber 15 is formed near the tip of the fire extinguishing agent aqueous solution introduction portion 12 in the head body 11, and the side wall surface 16 of the mixing chamber 15 exits from the entrance side following the formation site of the introduction path 18 described above. The taper is gradually expanded in a tapered manner at a constant inclination angle (2 degrees in the embodiment of FIG. 3) toward the side.
[0017]
Note that the expansion angle of the mixing chamber 15 in this case is less than 1 degree, specifically, the air from the intake port 14 to be described later is not so much caught in the inflowing fire extinguisher aqueous solution. Exceeding the angle, the negative pressure between the inflowing extinguishing agent aqueous solution and the side wall surface 16 of the introduction portion does not occur, so 4 degrees is the limit, and the expansion taper angle needs to be within the range of 1 to 4 degrees after all. There is.
[0018]
Reference numeral 14 denotes an air inlet formed with the outer opening facing the side surface in the vicinity of the tip of the extinguishing agent aqueous solution introduction part 12 of the head main body 11, and the inner opening opens toward the lower side of the horizontal part 13. A plurality of points are formed at equal intervals in the circumferential direction.
[0019]
The bowl-shaped deflector 20 has a window 22 for holding the holding member 25 at the center of the bottom surface, and is attached to a mounting flange 13a formed at the edge of the horizontal portion 13 of the head body 11. A large number of elongated slits 21 continuous in the vertical direction from the upper side to the bottom of the side surface are formed at equal intervals in the circumferential direction. Further, a plurality of pressure release ports 23 are formed in the circumferential direction along the peripheral edge of the window 22 at a position near the center of the bottom surface of the deflector 20 to alleviate the pressure increase inside the deflector during foaming.
[0020]
Further, the valve body 27 is supported via a valve seat 26 by a pair of left and right holding members 25 and 25 held by the upper end edge of the holding member 30 fitted into the window 22 of the deflector 20, and the mixing chamber described above. 15 openings are always closed. The holding members 25 and 25 have a low-melting point alloy 24 in the middle, and are melted by a hot air flow generated at the time of the fire, so that the holding members 25 and 25 are disassembled and detached, and the valve body 27 extinguishes fire in a supply pipe (not shown). It is pressed down by the pressure of the aqueous agent solution and drops off. As a result, the outlet of the extinguishing agent aqueous solution introducing portion 12, that is, the outlet of the mixing chamber 15 is opened, and the valve seat 26 is configured to be placed on the holding member 30 described above.
[0021]
Further, as shown in FIG. 5, the reflection plate 28 has a donut shape having a circular window 29 in the center, and the window 29 can be penetrated when the holding member 25 is attached. The flange 28a is formed by raising the outer peripheral edge upward, and the flange 20a is screwed to the opening flange of the deflector 20 and the mounting flange 13a of the horizontal portion 13 as shown in FIG. It is attached near the upper end opening of the.
[0022]
In the above configuration, when a fire occurs in the bubble radiation area, the low melting point alloy 24 is melted by the hot air flow and the like, and the entire holding portion including the holding member 25 is disassembled, and the valve body 27 together with the valve seat 26 extinguishes the fire. It falls by the extinguishing agent aqueous solution pressurization pressure in the supply pipe concerning the agent aqueous solution introduction part 12. The extinguishing agent aqueous solution enters the extinguishing agent aqueous solution introducing portion 12 of the head main body 11, passes through the introduction path 18 and is given a force in the centripetal direction, and hits the upper surface of the dropped valve body 27.
[0023]
At this time, when the fire extinguisher aqueous solution passes through the mixing chamber 15 of the fire extinguisher aqueous solution introduction portion 12, a negative pressure is generated between the side wall surface 16 having the tapered shape and air is simultaneously discharged from the intake port 14. After being sucked in and collided with the upper surface of the valve body 27 that has fallen together with the entrained air, the direction is changed in the direction of the side surface and is formed at equal intervals in the circumferential direction of the deflector 20 from the upper side surface to the bottom surface. It reaches a slit 21 that is continuous in the vertical direction, and when it passes through the slit 21, it is foamed and radiated outward.
[0024]
In this case, the extinguishing agent aqueous solution colliding with the valve body 27 hits the lower surface of the donut-shaped reflecting plate 28 attached to the opening edge of the deflector 20, and the scattering direction obliquely upward is changed to the horizontal direction.
[0025]
【The invention's effect】
As described above, the present invention provides a head main body comprising a fire extinguishing agent aqueous solution introduction portion attached to a supply pipe of a fire extinguisher aqueous solution to be pumped, a circular horizontal portion extending radially outward from the leading end of the introduction portion, and the head main body. A bowl-shaped deflector that is attached to the outer peripheral edge of the horizontal portion, and a donut shape in which a circular window is formed in the center portion of the deflector, which is interposed coaxially with a predetermined interval inside the deflector And a valve body press-contacted to the opening on the outlet side of the extinguishing agent aqueous solution introduction portion through a circular window of the reflecting plate and a low melting point alloy interposed between the reflector and the head. A plurality of air inlets are formed in the circumferential direction near the tip of the extinguishing agent aqueous solution introduction part of the main body, and the deflector is provided with elongated slits that are continuous in the vertical direction from the upper side to the bottom side of the deflector. In which a number is formed comprising the 隔毎.
[0026]
Therefore, the strength of the deflector part is increased in spite of being able to radiate bubbles uniformly in all directions below the foam head, and as a result, the oil fire extinguishing foam head itself can be made into a closed configuration. The head itself has both a fire detection function and a foam radiation function. Like conventional foam fire extinguishing equipment for fire extinguishing oil fires , in addition to the foam head, fire detection including a sprinkler head dedicated to fire detection. it is not necessary to separately provide a like device, and from where also eliminates the need to install a manual activation valve to open simultaneously open valve and the release valve where the open manually by the fire detection device, an oil fire extinguishing it can be achieved remarkable simplification of the configuration in use foam equipment.
[0027]
Further, in the above-described foam head, when a plurality of introduction paths directed in the centripetal direction from the entry side to the exit side of the extinguishing agent aqueous solution introduction part of the head body are formed, the radial direction of the extinguishing agent aqueous solution is By forcibly changing to the centripetal direction, the agitation performance with air is improved, so that the mixing chamber through which the fire extinguisher aqueous solution whose flow direction has been changed further to the centripetal direction passes from the inlet side to the outlet side is tapered. When the aqueous solution is gradually expanded, when the aqueous solution passes through the mixing chamber, a negative pressure is generated between the aqueous solution and the tapered wall surface, and at the same time, more air can be sucked and taken in from the intake port. Therefore, the foaming efficiency is greatly improved.
[0028]
Furthermore, in the case of forming a plurality of pressure release ports in the circumferential direction at a position near the bottom center of the deflector, it is possible to mitigate the pressure increase due to foaming in the deflector during radiation of the extinguishing agent aqueous solution, In addition, foaming performance can be improved, and when a donut-shaped reflector is attached to the opening edge of the bowl-shaped deflector, the extinguishing agent aqueous solution that has collided with the valve body hits the lower surface of the reflector. The scattering direction obliquely upward can be changed to the horizontal direction, and as a result, the radiation efficiency in the direction below the horizontal can be remarkably improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a fire fighting foam head according to an embodiment of the present invention.
2 is an enlarged plan view of the fire-extinguishing foam head of FIG. 1. FIG.
3 is an enlarged longitudinal sectional view showing a head main body of the fire-extinguishing foam head of FIG. 1. FIG.
4 is an enlarged bottom view of a deflector used in the fire fighting foam head of FIG. 1. FIG.
FIGS. 5A and 5B are a plan view and a cross-sectional view showing an enlarged reflection plate attached in the vicinity of the upper opening of the deflector. FIGS.
FIG. 6 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 13 Horizontal part 13a Mounting flange 14 Intake port 15 Mixing chamber 16 Side wall surface 17 Flow direction adjustment piece 18 Introduction path 19 Bending part 20 Deflector 21 Slit 21a Holding wall 22 Window 23 Back pressure port 24 Low melting point Alloy 25 Holding member 26 Valve seat 27 Valve body 28 Reflecting plate 28a Flange 29 Window 30 Holding member P Flow direction adjusting piece

Claims (4)

A head body composed of a fire extinguishing agent aqueous solution introduction portion attached to a supply pipe of a fire extinguishing aqueous solution to be pumped, a circular horizontal portion extending radially outward from the leading end of the introduction portion, and an outer peripheral edge of the horizontal portion of the head main body A bowl-shaped deflector to be attached, a donut-shaped reflector having a circular window formed in the center, which is coaxially disposed inside the deflector at a predetermined interval, and the reflector A fire extinguishing agent aqueous solution introduction part of the head body, comprising a valve body that is pressed into the opening on the outlet side of the extinguishing agent aqueous solution introduction part with a low-melting-point substance interposed between the deflector and the circular window of the plate A plurality of inlets are formed in the vicinity of the tip in the circumferential direction, and the deflector is formed with a number of elongated slits that are continuous in the vertical direction from the upper side to the bottom of the side surface at equal intervals in the circumferential direction. Oil fire extinguishing foam head, which was characterized by. A head body composed of a fire extinguishing agent aqueous solution introduction portion attached to a supply pipe of a fire extinguishing aqueous solution to be pumped, a circular horizontal portion extending radially outward from the leading end of the introduction portion, and an outer peripheral edge of the horizontal portion of the head main body A bowl-shaped deflector to be attached, a donut-shaped reflector having a circular window formed in the center, which is coaxially disposed inside the deflector at a predetermined interval, and the reflector And a valve body pressed through the opening on the outlet side of the fire extinguishing agent aqueous solution introducing a low-melting-point material between the deflector through a circular window of the plate, and the fire extinguishing agent aqueous chemical solution of the head body The introduction part is gradually expanded in a tapered shape with an inclination angle of 1 to 4 degrees from the entry side to the exit side, and a plurality of intake ports are formed in the vicinity of the extinguishing agent aqueous solution introduction part of the head body in the circumferential direction. Is Together are a number formed by the oil fire extinguishing foam head characterized by comprising an elongated slit continuous in the longitudinal direction toward the bottom surface from the side above each circumferentially equal intervals in deflector. Claim 1 or claim in which a plurality of pressure release ports are formed in the circumferential direction along the peripheral edge of the window at a position near the center of the bottom surface of the deflector. Item 3. An oil fire extinguishing foam head according to Item 2. The flow direction adjusting piece in which a plurality of introduction paths directed in the centripetal direction from the entry side toward the exit direction are fitted in the fire extinguishing agent aqueous solution introduction part. Foam head for oil fire extinguishing.

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