JP4469464B2 - Closed foam head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a closed-type foam head used for a foam fire extinguishing equipment.
[0002]
[Prior art]
An example of this type of closed-type foam head is described in Japanese Patent No. 2645796. As shown in FIG. 8, the closed-type foam head has a base end portion 32 a of an outer cylinder 32 that extends outward in the axial direction of the ejection port 31 of the head body 30 fixed to the head body 30. Between the base end portion 32 a of the outer cylinder 32 and the head main body 30, an air inlet 33 is formed for sucking in air taken in by the foam extinguishing liquid radiated from the ejection port 8. A U-shaped support frame 34 is further extended from the extended end portion 32 b of the outer cylinder 32, and a deflector 35 is attached to the extended end portion 34 a of the support frame 34. The ejection port 31 of the head body 30 is closed by a valve 37 that is pressed by a fire sensing member 36 formed of a fusible link. Between the outer cylinder 32 and the deflector 35, a broken piece of the fire detection member 36 that disassembles and scatters and an opening 38 that scatters the valve 37 outward is formed to match the length of the support frame 34. Yes. When a fire occurs, the fire detection member 36 is disassembled by the heat and scattered from the opening 38 to the outside to release the pressing state against the valve 37, and the valve 37 is blown outside from the opening 38 by the pressure of the foam fire extinguishing liquid. The injection port 31 is opened, and the discharge of the foam fire-extinguishing liquid is started.
[0003]
[Problems to be solved by the invention]
However, in the closed type foam head having a structure in which the outer cylinder 32 is extended from the head main body 30 and the support frame 34 is further extended from the extended end portion of the outer cylinder 32, the entire foam head is lengthened. When installed on the ceiling of an object upward or downward, it may interfere with the exposed pipes and ducts of other equipment and devices that are placed on the ceiling, and the ceiling is low in rooms where interior decoration is important There is a risk of damaging the aesthetics when installed in a location. In addition, since the fire detection member 36 in the support frame 34 is almost exposed to the outside, the fire detection member 36 is deformed or broken when a long bar or the like is inadvertently hit the fire detection member 36 particularly in a low ceiling. There is a risk of accidental water discharge.
[0004]
Therefore, the present invention can reduce the size and size of the ceiling so that it can be installed in a small space on the ceiling surface and also on a ceiling or the like where interior decoration is important. An object is to provide a closed foam head that can be protected.
[0005]
[Means for Solving the Problems]
As shown in FIGS. 1 to 7, the closed-type foam head as a premise of the present invention includes a head main body 1 having a foam-extinguishing liquid jet port 8, a valve 4 for closing the jet port 8, and the valve 4. The fire detection member 5 which is pressed against the valve seat 8a of the injection port 8 and decomposed and scattered by fire heat to release the pressed state against the valve 4 and permit the valve 4 to be scattered by the pressure of the foam fire extinguishing liquid, and this fire detection A support frame that extends from the head body 1 to the axial direction outward of the ejection port 8 so as to be spaced from the member 5 and has a support portion 14 that supports the fire detection member 5 at the extended end portion thereof. 2 and a deflector 6 provided on the extended end side of the support frame 2 so as to face the injection port 8.
In addition, according to the present invention, a cylindrical cover wall 3 that covers the outer periphery of the fire detection member 5 is provided at an intermediate portion in the extending direction of the support frame 2, and the head body side end of the cover wall 3 and the head body 1 are provided. The first opening port that allows air to be taken in by the foam extinguishing liquid radiated from the injection port 8 and that disassembles the debris of the fire sensing member 5 that disassembles and scatters and the valve 4 to scatter outward. 23, and a second opening 24 that allows the fragments of the fire sensing member 5 to be disassembled and scattered between the deflector 6 and the outer side of the valve 4 between the deflector 6 and the valve 4. Is formed so as to communicate with the first opening 23.
[0006]
In this case, the internal passage 9 communicating with the ejection port 8 of the head main body 1 can be provided with a swirling flow imparting mechanism 10 that generates a swirling flow in the foam fire extinguishing liquid.
[0007]
[Action]
According to the closed-type foam head having the above-described configuration, when a fire occurs, the fire detection member is decomposed by the fire heat entering the covering wall from the first opening or the second opening, and the fragments are separated from the first opening or the first opening. 2 Splashing from the opening to the outside releases the pressed state against the valve. With this release, the valve is splashed to the outside from the first opening or the second opening by the pressure of the foam fire extinguishing liquid, thereby opening the injection port. The foam-extinguishing liquid radiated from the opened jetting port takes in air from the first opening and foams, collides with the deflector and disperses to the surroundings, and forms a foam radiation pattern. At that time, if a swirl flow imparting mechanism is provided in the internal passage of the head main body, the air can be more reliably and satisfactorily discharged into the foam extinguisher radiated from the ejection port, and high-quality foam bubbles can be released. it can.
[0008]
Further, since the closed-type foam head having the above-described configuration has the covering wall provided in the intermediate portion in the extending direction of the support frame, the lengths of both the head body and the support frame are compared in comparison with the closed-type foam head shown in FIG. When it is the same, the entire length can be shortened and downsized by the length of the outer cylinder 32, and it can be accommodated in a small space on the ceiling surface. Further, since the covering wall covers the outer periphery of the fire detection member, the fire detection member can be protected from an obstacle from the outside.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a closed bubble head according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the closed type foam head, FIG. 2 is a front view of the closed type foam head half-cut, FIG. 3 is a side view of the closed type foam head, and FIG. 4 is a fire detection of the closed type foam head. It is an expansion vertical front view of the support part of a member.
[0010]
As shown in FIG. 2, the closed-type foam head according to the present invention includes a head body 1, a support frame 2, a cover wall 3, a valve 4, a fire detection member 5, and a deflector 6. The head main body 1 has a connection port 7 connected to a pipe line (not shown) of the foam fire extinguishing liquid pipe, a tapered injection port 8, and an internal communication between the connection port 7 and the injection port 8. A passage 9 is formed. The internal passage 9 incorporates a swirl flow imparting mechanism 10 composed of a screw or the like for generating a swirl flow in the foam fire extinguisher.
[0011]
As shown in FIGS. 2 and 3, the support frame 2 is integrally extended substantially parallel to the axially outward direction of the ejection port 8 from two opposite positions on the outer peripheral portion of the ejection port opening end surface of the head body 1. Formed in a generally rectangular frame shape by the vertical arm portions 11, 11 of the book and the lateral arm portions 12, 12, which are bent and connected substantially at right angles toward the center of the extending end portions of the vertical arm portions 11, 11. And the boss | hub part 13 is integrally projected outward from the center part where the horizontal arm parts 12 and 12 face each other.
[0012]
As shown in FIG. 2, the injection port 8 of the head body 1 is closed by a valve 4. The valve 4 is formed in a cross-sectional hat shape and fitted in the injection port 8, and the fire sensing member 5 is used to insert a flange portion of the valve 4. 4a is pressed against the valve seat of the injection port 8 in close contact. As the fire detection member 5, a glass bulb in which a thermal expansion liquid such as alcohol that expands due to heat is enclosed in a glass tube is used. In this glass bulb, when the temperature around the closed-type foam head becomes equal to or higher than a certain temperature, the thermal expansion liquid expands and is destroyed. As the fire detection member 5, a fusible link having a well-known low melting point alloy portion can be used instead of the glass bulb.
[0013]
As shown in FIG. 4, the fire detection member 5 is supported by a support portion 14 provided on the boss portion 13 of the support frame 2. The support portion 14 has a small-diameter screw hole 15 and a large-diameter screw hole 16 communicating with each other in the vertical direction in a stepped manner in the boss portion 13, and a hole screw 17 is inserted from the large-diameter screw hole 16 to obtain a diameter. The fire detection member 5 is supported by the tip recess 17a of the screw 17 with a hole that is screwed into the small screw hole 15 and protrudes from the inner end face of the boss portion 13. The strength of pressing the valve 4 against the valve seat of the injection port 8 by the fire detection member 5 can be adjusted by adjusting the screwing amount of the hole screw 17 into the small screw hole 15.
[0014]
As shown in FIG. 1, the deflector 6 is formed by radially arranging slits 19 in a circular plate 18, and the deflector 6 has a large screw hole 16 in the boss portion 13 of the support frame 2 so as to face the injection port 8. It is fastened and fixed with a head screw 20 screwed into the head.
[0015]
As shown in FIGS. 2 and 3, the cover wall 3 is formed in a cylindrical shape and is provided with a female screw 21 on the inner periphery, and is screwed into a male screw 22 provided on each outer surface of the vertical arm portions 11 and 11 of the support frame 2. Thus, the outer periphery of the fire detection member 5 is attached to the intermediate portion in the extending direction of the support frame 2 with a predetermined interval. At that time, between the head main body side end of the cover wall 3 and the head main body 1, the disintegrated fragments and the valve of the fire detecting member 5 that sucks in air taken in by the foam extinguishing liquid radiated from the ejection port 8 and decomposes and scatters. 1st opening 23 for making it fly outside of 4 is formed. In addition, between the deflector side end of the covering wall 3 and the deflector 6, a fragment of the fire detecting member 5 that disassembles and scatters and a second opening 24 for scattering outward from the valve 4 communicates with the first opening 23. To form.
[0016]
The closed-type foam head configured as described above has a connection port portion 7 of the head body 1 in a normal state in which the valve 4 is pressed against the valve seat 8a of the injection port 8 by the fire detection member 5 and the injection port 8 is held closed. The pressurized foam extinguishing liquid filled up to the inside is blocked by the valve 4.
[0017]
Now, when a fire occurs and fire heat of a certain temperature or more enters the covering wall 3 from the first opening 23 or the second opening 24, the fire detection member 5 is decomposed by the fire heat, and the fragments are The state of pressing against the valve 4 is released by scattering from the first opening 23 or the second opening 24 to the outside. Along with this release, the valve 4 is scattered to the outside from the first opening 23 or the second opening 24 by the pressure of the foam fire extinguishing liquid, so that the injection port 8 is opened. The foam extinguishing liquid radiated from the opened injection port 8 takes in air from the first opening 23 and foams, collides with the deflector 6 and is dispersed to the surroundings. By disperse | distributing the foam covering the surface of a combustion thing, fire extinguishing, such as an oil fire, is also attained by the suffocation effect and the cooling effect of the water which forms a foam.
[0018]
As shown in FIGS. 5 to 7, the shape of the support frame 2 is two combs extending integrally from the outer peripheral portion of the jet port opening end face of the head body 1 to the axial direction outward of the jet port 8. It can also be formed in a rhombus frame shape or a similar frame shape by the letter-shaped arm portions 25, 25. In this case, the cover wall 3 is integrally formed in an annular shape between the bent portions of the arm portions 25 and 25. Further, the support portion 14 for supporting the fire detection member 5 is configured by a screw 17 with a hole which projects a boss portion 26 inwardly from a center of abutment between the arm portions 25 and 25 and is screwed into the boss portion 26. The The deflector 6 is caulked to the outer end side of the boss portion 26. Also in this embodiment, as in the case of the above-described embodiment, the air taken in by the foam extinguisher radiated from the ejection port 8 is sucked between the head body side end of the cover wall 3 and the head body 1, and A disassembled fragment of the fire sensing member 5 that disassembles and scatters and a first opening 23 that allows the valve 4 to disperse outwardly are formed, and disperses and scatters between the deflector side end of the covering wall 3 and the deflector 6. A second opening 24 that allows debris of the fire detection member 5 and scattering of the valve 4 to the outside is formed in communication with the first opening 23.
[0019]
It is optional to install the closed-type foam head downward so as to release the foam fire-extinguishing liquid downward and upwardly so as to release the foam fire-extinguishing liquid upward. In addition, since the closed type foam head of this invention is equipped with the heat sensitive mechanism by the fire detection member 5, it can be used also for a fire detection head.
[0020]
【The invention's effect】
According to the closed type foam head of the present invention, it is particularly advantageous that it can be reduced in size and shortened, can be installed in a small space on the ceiling surface, and can safely protect the fire detection member from trauma. It is.
[Brief description of the drawings]
FIG. 1 is a plan view of a closed foam head.
2 is a half-cut longitudinal front view of the closed foam head of FIG. 1. FIG.
3 is a side view of the closed foam head of FIG. 1. FIG.
4 is an enlarged longitudinal sectional front view of a support portion of a fire detection member of the closed type foam head of FIG. 1. FIG.
FIG. 5 is a plan view of a closed-type foam head showing another embodiment.
6 is a half-cut longitudinal front view showing a closed state of the closed type foam head of FIG. 5. FIG.
7 is a side view of the closed foam head of FIG. 5. FIG.
FIG. 8 is a longitudinal sectional front view showing a closed state of a closed type foam head of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Head main body 2 Support frame 3 Cover wall 4 Valve 5 Fire detection member 6 Deflector 7 Connection port part 8 Injection port 9 Internal passage 10 Swirling flow provision mechanism 14 Support part 23 1st opening port 24 2nd opening port

Claims (2)

A head body having a jet of foam fire extinguishing liquid, a valve that closes the jet, and presses the valve against the valve seat of the jet, and dissociates and scatters by fire heat to release the pressure on the valve and extinguish the foam. A fire detection member that allows the valve to scatter due to the pressure of the liquid, and extends from the head main body in the axial direction so as to be spaced apart from the fire detection member; In a closed type foam head comprising: a support frame having a support portion for supporting the fire detection member; and a deflector provided on the extended end side of the support frame so as to face the ejection port.
A cylindrical cover wall that covers the outer periphery of the fire detection member is provided at an intermediate portion in the extending direction of the support frame, and is radiated from the ejection port between the head body side end of the cover wall and the head body. Forming a first decomposing piece of the fire sensing member that absorbs air that is taken in by the foam fire-extinguishing liquid and decomposes and scatters, and a first opening that allows the valve to scatter outward, and the deflector side end of the covering wall and the Closure characterized in that a second opening that allows dissociation and scattering of the fire sensing member and the outward scattering of the valve is formed between the first opening and the deflector. Mold foam head.   The closed-type foam head according to claim 1, wherein a swirl flow imparting mechanism for generating a swirl flow in the foam fire-extinguishing liquid is provided in an internal passage communicating with the ejection port of the head main body.

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