JP3413630B2 - Foam solution spray head - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed-type foam aqueous solution spray head used in a closed-type sprinkler water-film fire extinguishing facility for extinguishing a suffocation by forming a water film.

[0002]

2. Description of the Related Art Fire extinguishing equipment includes sprinkler extinguishing equipment for extinguishing water and foam sprinkler extinguishing equipment for extinguishing bubbles. This foam sprinkler fire extinguishing equipment is mainly used when a fire is difficult to extinguish with water, such as a fire of a flammable liquid such as oil or gasoline. In the conventional foam sprinkler fire extinguishing equipment, in the event of a fire, water for fire extinguishing mixed with a foam extinguishing agent is foamed and sprayed by a closed foam head.

As a conventional closed type foam head, there is the following one (see Japanese Patent Laid-Open No. 7-31691). That is, the foam fire extinguishing liquid flowing out from the discharge port is made to engulf the air sucked from the intake port provided at a predetermined location to foam, and the foam extinguishing liquid foamed in the foam head main body. A deflector arranged facing the discharge port,
A valve for closing the discharge port by being overlapped with a seat provided on the peripheral portion of the discharge port, and pressing the valve against the seat part and disassembling and scattering by detecting a fire and pressing against the valve. With a fire detection actuating member that releases the state and allows the valve to blow off due to the pressure of the foam extinguishing liquid,
A closed-type foam head, characterized in that an opening is formed between a discharge port and a deflector of the foam head body to allow the disassembled and scattered components of the fire detection operating member and the valve to scatter.

[0004]

The conventional foam sprinkler fire extinguishing equipment has the following problems. (1) In this foam head, the foam extinguishing liquid entrains the air sucked from the intake port and foams, and the foam collides with the deflector and is dispersed, but this foam is extremely lighter than a water droplet. Therefore, this bubble cannot fly far, so 1
The area that can be sprayed with one foam head is extremely narrow compared to the spray head of the sprinkler fire extinguishing system. Therefore, in order to spray the foam over the entire predetermined range, a larger number of foam heads are required as compared with the water spraying head, which increases the equipment cost.

(2) Protein foam extinguishing agents and synthetic surfactant foam extinguishing agents are used as foam extinguishing agents. However, these foam extinguishing agents are mainly those that cover the surface of the fuel with the accumulated bubbles to shut off the air and extinguish the fire, but the reducing liquid of the foam has a large specific gravity and sinks under the fuel. It gets crowded. Therefore, the fire cannot be extinguished efficiently.

In view of the above circumstances, it is an object of the present invention to efficiently extinguish a fire by using a water film foam extinguishing agent. Another purpose is to reduce equipment costs and maintenance costs.

[0007]

SUMMARY OF THE INVENTION The present invention is a spraying head supplied with an aqueous foam solution in which a water film-forming foam extinguishing agent and water for extinguishing fire are supplied; the head directly discharges the aqueous foam solution. An outlet, and a rectangular flat plate-shaped deflector provided facing the discharge port and having a plurality of guide portions and slits for directly spraying the aqueous foam solution ,
The deflector uses the diagonal guides on both sides of the central guide on the long side.
It is formed shorter than the inside, and the tip of the guide part on the short side is placed on the short side.
A foam aqueous solution spray head characterized by being positioned . In addition, a foam formed by mixing a water film foam extinguishing agent and fire extinguishing water.
A spraying head supplied with an aqueous solution; said head comprising:
A discharge port for directly discharging the aqueous foam solution without bubbling, and the discharge
It is provided facing the mouth, and the aqueous foam solution is used as droplets.
Long type with multiple guides and slits for direct spraying
It is composed of a flat plate-shaped deflector and
It is a spray head of aqueous foam solution. Furthermore, water film foam
Supplied with an aqueous foam solution that is a mixture of fire extinguishing agent and fire extinguishing water.
A spraying head; the head whipping the aqueous foam solution
Without the cylindrical discharge port that directly discharges
And the aqueous solution of foam is directly sprayed as droplets.
Rectangular flat plate with multiple guides and slits
A bubble characterized by being composed of a deflector and
Aqueous solution spray head.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The mixer is connected to a water supply source such as a water tank and a raw material tank dedicated to a water film foam extinguishing agent.
This mixer mixes fire extinguishing water supplied from a water supply source and a water film foam extinguishing agent supplied from a raw material tank to form a foam aqueous solution.

This water film foam extinguishing agent is a foam extinguishing agent for a water-soluble liquid containing a fluorine-based surfactant as a main component.
Generally, the fire is extinguished by the air blocking action of both bubbles and water film formation. However, in the present invention, by using the closed type foam aqueous solution spraying head lacking the foaming means, the foam aqueous solution is directly sprayed while preventing foaming, and is directly dropped on the surface of the fuel to form a thin film of water, so-called water film formation. Form, coat and suffocate to extinguish fire.

Various types of water film extinguishing agents have been developed. For example, Light Water (trade name of US,
3M, etc.), Megafoam F-623 (trade name, Dainippon Ink and Chemicals, Inc.) and the like. These foam fire extinguishing agents consist of a fluorosurfactant, foam stabilizer, water-soluble polymer, antifreeze agent, etc., and are 3 to 4 times more extinct than protein foam extinguishing agents and interface foam extinguishing agents. Be effective.

A closed type foam aqueous solution spraying head is provided on the downstream side of the mixer. This head is a valve body that closes the discharge outlet of the aqueous foam solution, and a fire detection operation that presses the valve body against the discharge outlet and scatters in the event of a fire to release the pressure and has a small heat capacity. It is composed of a member and a rectangular flat plate-shaped deflector provided facing the discharge port and having a plurality of guide portions and slits, but lacks the foaming means as described above. .

When a fire detection actuating member senses a fire due to the occurrence of a fire, the actuating member disassembles and scatters, and at the same time, the valve body falls to open the discharge port. The aqueous foam solution is ejected from the discharge port, collides with the deflector, and is scattered toward the predetermined spraying area while being guided by the guide portion to form a rectangular spray area. At this time, the head lacks foaming means,
The aqueous bubble solution scatters in droplets with almost no foaming, forming a water film on the surface of the fuel against the air stream of the flame to extinguish the suffocation.

[0013]

Embodiments of the present invention will be described with reference to FIGS. The fire extinguishing equipment of the building is, for example, installed on the ground floor and has a closed sprinkler piping system A for spraying the fire extinguishing water W in case of a fire, and an underground parking lot for extinguishing the water W and water film foam extinguishing agent G. And a sprinkler water film formation piping system B for spraying a foam aqueous solution M in which Both piping systems A,
B is connected to a water tank 41 via a common pump 40. Therefore, the equipment cost can be reduced.

The sprinkler piping system A is provided on the ground floor, is provided with an open valve 1 having a water flow detecting function, and is arranged on the secondary side of the open valve 1, and is opened by heat detection of a fire detection operating member. The closed type water sprinkling head 3 and the interlocking type smoke detector 5 having a small heat capacity for detecting a fire are provided.
The fire extinguishing water W is filled between the open valve 1 and the closed type water sprinkling head 3, which is so-called wet type. However, instead of the fire extinguishing water W, gas, for example, air is filled to make the so-called dry type. May be.

The open valve 1 is connected to the fire extinguishing system board 30, and the smoke detector 5 is connected to the self-fire alarm receiver 32.

The sprinkler water film forming piping system B is connected to the parking lot P.
It is provided in A. This parking lot PA is a machine parking lot,
A roadway section 50 and a parking section 60 are provided. This piping system B
Is a mixer 1 for mixing the pressure adjusting valve 10 for adjusting the water pressure of the fire-extinguishing water W pumped from the pump 40 and the fire-extinguishing water W and the water film-forming foam extinguishing agent G supplied from the stock solution tank 12.
4 and open valve 15 with running water detection function that issues an alarm when water flows
A fast-moving closed-type aqueous foam spray head 16 having a small heat capacity, which is disposed on the secondary side of the opening valve 15 and is opened by heat detection of a fire detection operating member; and heat detection for detecting a fire. The container 17 is provided.

The raw material tank 12 is a tank exclusively for water film foam extinguishing agents, and examples of the water film extinguishing agent include light water (trade name, 3M Company, USA), Megafoam F-623 (commercial product). Name, Dainippon Ink and Chemicals, Inc., etc. are used. These foam fire extinguishing agents consist of a fluorosurfactant, foam stabilizer, water-soluble polymer, antifreeze agent, etc., and are 3 to 4 times more extinct than protein foam extinguishing agents and interface foam extinguishing agents. Be effective.

The closed type foam aqueous solution spraying head 16 is provided in each of the roadway portion 50 and the parking portion 60. In the roadway portion 50, the head 16 is provided on the ceiling 51, in the parking lot 60, the closed-type foam aqueous solution spray head 16a for the upper stage is provided on the ceiling 51, and the closed-type aqueous solution spray head 16b for the lower stage is adjacent to the pallet P. It is provided in the space between ₁ , P _2, P ₃ . The head 16a is the upper pallet P ₁
It provided substantially at the central portion above the ceiling 51 of the to P _3, also the head 16b is fixed in the vicinity of the pallet P ₁ to P ₃ while allowing each sandwich the pallet P ₁ to P _3. P
_{11 to} P ₁₃ are lower pallets, and passenger cars MC are parked on the respective pallets P _{11 to} P ₁₃ . Each of these pallets moves up and down when parking and entering, and the head is provided between the pallets for that purpose. And, of course, the piping to the head 16b is also provided so as to avoid the pallet from the side wall direction or the ceiling direction.

This closed type foam aqueous solution spraying head 16, 16
a and 16b are a valve body 18 for closing the discharge port 19, a fast-moving fire detection actuating member 20 having a small heat capacity for pressing the valve body 18 against the discharge port 19, a deflector 22 fixed to an arm 21, Is equipped with.

The valve body 18 is pressed against the discharge port 19 via the packing 23. The fire detection actuating member 20 is a glass valve including a glass tube 20b and an alcohol 20a enclosed in the glass tube 20b. When the alcohol 20a expands due to heat, the glass tube 20b is damaged and the valve body 18 is supported. Lose function. At this time, the thermal response differs depending on the size of the glass bulb, and by making it thin, it becomes a fast-moving type.

The deflector 22 is a rectangular flat plate, and guide portions 26a to 26c are provided on the outer peripheral portion of the collision portion 24 at the center thereof.
28a, 28b and slits 25a to 25c, 27
a and 27b are formed.

Each slit 25a-25c, 27a, 27
b are respectively located on a straight line passing through the center O of the deflector 22, and adjacent slits are arranged in a radial pattern with respect to each other. Slit 27a on the long side L of the rectangular flat plate,
27b is formed shorter than that of the slits 25a to 25c on the short side S side, but the depth and width of this slit are appropriately selected as necessary.

The tips of the guide portions 26a, 26b on the short side of the rectangle are located on the short side S. The long side L of the rectangle
The central part on the side is concave, and the central guide part 28a,
The length of 28b is shorter than that of the diagonal guide portions 26c, 26c on both sides thereof. This is the guide portion 28a, 2
This is for suppressing the scattering distance of 8b in the guide direction.

In this deflector 22, the guide portions 26a, 26b on the short side S side and the diagonal guide portion 26c on the long side L side are provided.
Is longer than the guide portions 28a and 28b on the long side L, the scattering distance in the guide portions 26a to 26c direction is the guide portion 28a and 28b.
It is longer than 28b, and forms a rectangular-shaped spreading area as a whole. In addition, 29 is a fixing member for attaching the deflector 22 and the glass bulb 20 to the arm 21, and since this member 29 projects onto the deflector 22 during spraying, it serves as a cone.

The operation of this embodiment will be described. When a fire occurs on the ground floor, for example, the second floor, and the smoke detector 5 detects the fire, the detection signal is sent to the self-fire alarm receiver 32 and the fire information is sent from the receiver 32 to the fire extinguishing system panel 30. Will be sent. Based on the fire information, the fire extinguishing system board 30 outputs a start signal to the required release valve 1 to be released.

Further, when the fire progresses and the closed type water sprinkling head 3a on the second floor senses the fire and the fire sensing actuating member is released, the valve body opens and first accumulates on the secondary side of the open valve 1. Fire extinguishing water W is discharged. Then, running water is generated in the corresponding open valve 1 to activate the running water detection function, and the fire extinguishing system board 3
Fire information is sent to 0.

Based on the pressure drop in the piping system A, the pump 40
Will start. As a result, the fire-extinguishing water W in the water tank 41 is pressure-fed to the sprinkler piping system A by the pump 40, and is discharged from the water sprinkling head 3a at an optimum discharge pressure based on the pressure regulating function (not shown) of the opening valve 1. Fire extinguishing water W is open valve 1
As long as it passes through, the running water detection function works and running water information such as running water alarm is issued.

Further, for example, when a fire occurs in the passenger car MC ₁ parked on the pallet P ₁₂ in the underground parking lot and the heat detector 17 detects the fire, the detection signal is sent to the self-fire alarm receiver 32. , The fire extinguishing system board 30 from the receiver 32
Fire information is sent to. Based on this fire information, the fire extinguishing system board 30 outputs a start signal to the required release valve 15 to enable release.

When the fire further progresses and the closed foam aqueous solution spray heads 16b, 16b near the passenger car MC ₁ receive the heat of the fire, the alcohol 20a in the glass bulb 20b having a small heat capacity expands and the glass tube 20b accelerates. While being damaged, the valve body 18 drops. The discharge port 19 opens, and the aqueous foam solution M accumulated on the secondary side of the open valve is discharged first. Then, fire information is transmitted to the fire extinguishing system board 30 based on the flowing water detection function of the open valve 15.

As with the sprinkler piping system A, the pump 40 is started based on the pressure drop.

As a result, the fire-extinguishing water W in the water tank 41 enters the mixer 14 while the pressure is adjusted by the pressure adjusting valve 10, and is mixed with the water film-forming foam extinguishing agent G supplied from the raw material tank 12 to a predetermined level. The aqueous foam solution M has a concentration.
The mixing ratio of the water film foam extinguishing agent G is appropriately selected according to need, and for example, 3% is selected.

The aqueous foam solution M is supplied through the opening valve 15 at a predetermined pressure based on a pressure regulating function not shown in detail, reaches the closed aqueous foam solution spray head 16b, and goes from the discharge port 19 to the deflector 22. Are released directly. The discharged foam aqueous solution M is fixed to the fixing member 29 and the deflector 22.
It collides with the collision part 24 and directly scatters while being controlled by the guide part.

At this time, the closed type foam aqueous solution spraying head 16b
Since no foaming means is provided and the aqueous foam solution M has a low foaming property, the aqueous foam solution M directly scatters in a droplet state with almost no foaming. Therefore, the flight distance can be greatly extended as compared with the case of scattering in the form of bubbles, and the fire extinguishing range can be expanded.

That is, the aqueous foam solution M that has collided with the deflector 22 is dispersed as droplets, and is guided by the guide portions 26a to 26c, 28.
While being guided by a and 28b, they scatter in the direction of the arrow X, but the guide portions 26a to 26c are the guide portions 28a,
Since it is longer than 28b, the flight distance of the former is longer, that is, it travels far. Also, the slits 25a to 25
Although the aqueous foam solution M also drops in the direction of arrow Z from c, 27a, and 27b, the flight distance is as long as the guide portions 26a to 26c,
Shorter than 28a and 28b. The spray areas AR _{1 and} AR ₂ formed by the deflector 22 have a rectangular shape as shown in FIG. 5, but they are partially overlapped so that no gap is created between the AR _{1 and} AR ₂ .

Further, since the aqueous foam solution M directly jumps into the flame and reaches the surface of the fuel, a water film is easily formed on the surface of the fuel, and the water film is expanded. Extinguish the suffocation by covering the entire fuel. This water film spreads very quickly and extends to every corner of the fuel surface, so that effective fire extinguishing can be performed.

In the spray head of the above-mentioned embodiment, the head using the glass valve as the fire detection actuating member 20 for supporting the valve body 20 is shown, but the present invention is not limited to this, and a so-called fusible ring using solder is used. The head may be a head, and at that time, the deflector 22 is arranged in the vicinity of the valve body 18, pops out together with the arm based on the release of the fuse, slides, and is arranged in the above-described embodiment as a so-called flash type head. Is also good.

Although the head of the above embodiment is of the closed type, it may be of the open type, in which case the fire detection actuating member 20 including the valve body 18 may be deleted. In that case, the simultaneous release operation of the open valve 15 based on the operation of the heat detector 17 results in the simultaneous release from all the heads connected. Also in this case, since the head of the present invention can widely spread directly in a rectangular shape, it is easy to form a protective section especially in a parking lot.

[0038]

Since the present invention is constructed as described above, the aqueous foam solution discharged from the discharge port directly collides with the deflector without being bubbled and is directly scattered as droplets while being guided by the guide portion. , Dispersed in a rectangular shape. Since these droplets are heavier than the bubbles of the conventional example, they can be scattered to a long distance, and can also directly jump into the flame and land on the surface of the fuel. Therefore, the fire can be extinguished more efficiently than in the conventional example, and the predetermined fire extinguishing area can be sufficiently covered with a smaller number of heads than in the conventional example, so that the equipment cost can be reduced.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

FIG. 2 is a plan view showing a parking lot according to an embodiment of the present invention.

FIG. 3 is a front view showing a parking lot according to an embodiment of the present invention.

FIG. 4 is a side view showing a parking lot according to an embodiment of the present invention.

FIG. 5 is a plan view showing a spraying situation.

FIG. 6 is a front view of a closed type foam aqueous solution spraying head according to an embodiment of the invention.

FIG. 7 is a plan view of a deflector of a closed-type aqueous foam spray head.

FIG. 8 is a vertical cross-sectional view of a closed type foam aqueous solution spraying head according to an embodiment of the present invention.

FIG. 9 is a vertical cross-sectional view showing a state of the closed-type aqueous foam solution spray head during spraying.

[Explanation of symbols]

12 Stock solution tank 15 Open valve 16 Closed foam aqueous spray head 18 valve body 19 outlet 20 Fire detection actuating member 22 Deflector 25a slit 26a Information section 40 pumps G Water film foam extinguishing agent M foam aqueous solution

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) A62C 27/00-39/00

Claims (3)

(57) [Claims] 1. A spraying head to which an aqueous foam solution in which a water film-forming foam extinguishing agent and water for extinguishing water are mixed is supplied; the head directly discharges the aqueous foam solution, and the discharge head is opposed to the outlet. and provided, and a rectangular plate-shaped deflector having a plurality of guide portions and slits of directly spraying該泡solution, consists, said deflector, a pair of opposite sides of the central guide portion of the long side Horn
It is formed shorter than the guide part, and the tip of the guide part on the short side is on the short side.
A foam aqueous solution spray head characterized by being located at . 2. A water film foam extinguishing agent and water for extinguishing are mixed.
A spraying head supplied with an aqueous foam solution; the head discharges the aqueous foam solution directly without foaming
Mouth and the discharge port provided opposite to the discharge port
Equipped with multiple guides and slits for direct spraying
And a rectangular flat plate-shaped deflector, and a foam aqueous solution spraying head comprising the deflector . 3. A water film foam extinguishing agent and water for extinguishing are mixed.
A spray head supplied with an aqueous foam solution; the head directly ejecting the aqueous foam solution without foaming
-Shaped discharge port and a bubble aqueous solution that is provided facing the discharge port and is a droplet
Equipped with multiple guides and slits for direct spraying
And a rectangular flat plate-shaped deflector, and a foam aqueous solution spraying head comprising the deflector .