JP2000279550A - Fire extinguishing and fire suppressing closed type spray outlet head and its installation method in structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make obtainable a constant sensitivity at all times without any relation to the position of a fire source by setting the outlet face of a nozzle approximately flush with the outer circumferential face of the head body in a fire extinguishing and fire suppressing closed type spray outlet head atomizing and discharging water in a mist form from the outlet, when a heat sensitive element is broken by heat. SOLUTION: The fire extinguishing and fire suppressing closed type spray outlet head 1 atomizes and discharges water in a mist form from a nozzle 4, provided with the nozzle 4 attached to a head body 3 having an attachment part 2 to a discharge pipe, and holds a heat sensitive element 6 to the bottom end via a support member 5. An outlet 4a is provided for each nozzle, for example, and a glass valve and a melting metal are used for the heat sensitive element 6 which is melted at a fire. A face of the outlet 4a of the nozzle 4, namely, a face to be a surface in being attached is set approximately flush with the outer circumferential face of the had body 3. This constitution allows a heat airflow flowing along the ceiling to abut against the heat sensitive element so as to be able to obtain a prescribed sensitivity without any relation to the position of the fire source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed spray water discharge head for extinguishing and suppressing fire and a method of installing the same in a building.

[0002]

2. Description of the Related Art A conventional closed spray water discharge head for extinguishing and suppressing fires is as shown in FIGS.
That is, the head 100 has one or a plurality of nozzles 1 attached to a head main body 102 having an attachment portion 101 to a water discharge pipe.
03 and 103, and more specifically, a thermosensitive body 105 is held at a lower end portion via a support member 104.
Here, 103a is a water discharge hole of the nozzle.

The nozzle 103 is attached to the head main body 102 by a method using a screw or the like. Further, one or more water discharge holes 103a are provided for each nozzle 103. The thermal element 105 melts in the event of a fire, and is made of a glass bulb or a molten metal.

[0004] In the event of a fire, the heat-sensitive body 105 is heated by heat.
When is broken, water is atomized from the water discharge hole 103a of the nozzle 103 and is discharged in the form of a mist. The water particles have a size of about 50 μm to 400 μm.

However, the above-mentioned conventional head has the following problems. That is, the nozzle 103 protrudes from the outer peripheral surface of the head main body 102.

[0006] As described above, the nozzle 103 is connected to the head main body 10.
2 protrudes from the outer peripheral surface, there is no problem when the fire source F is directly below the head 100 as shown in FIG. 14, but when the fire source F is not directly below as shown in FIG. There's a problem. This is because, in this case, the hot air flow F1 flows down the ceiling T and flows to the head 100, and at this time, as shown in FIG. As a result, there is a possibility that sufficient heat is not applied to the heat-sensitive body 105, and the detection of a fire is delayed. In addition, there is a problem that the sensitivity varies when the contact of the hot air flow changes depending on the position of the fire source.

Conventionally, fires occurring in the indoor space of a building have been dealt with, for example, by using equipment as shown in FIG. For example, sprinkler heads 107, 108, and 109 are installed in the upper part of the entrance 106, the closet B, and the bed C in the chamber 106, thereby spraying water to extinguish the fire. Incidentally, 107a, 108a, 10
9a is the sprinkler head 107, 108, respectively.
109 shows the range of watering.

[0008] However, in the case of such a sprinkler, since the diameter of each particle of water to be sprinkled is large, FIG.
It falls in a parabola as shown in the figure, and the area of watering is narrow. Therefore, water does not reach the fire source F that is not so far away, and a large number of sprinkler heads must be installed depending on the area and shape of the room.

[0009] In addition, sprinklers have the above-mentioned problems. Instead, water is replaced with water having a particle diameter of 50 µm or less.
It has also been considered to use a spray water discharge head that discharges the liquid in the form of fine particles having an extremely fine size of 400 μm.

In such a case, since the water becomes fine particles and floats in the air, the water spreads far away from the head as shown in FIG. Reference numeral 110 denotes a head. In this way, one can cover a wide area, so it is enough to have two in one room (one for the bed and one for the closet). Therefore, in the case of the conventional sprinkler, two parts are required instead of three parts, and the installation cost can be reduced.

However, there are some problems when using such a head. That is, as shown in FIG. 20, when the doorway (opening) of the chamber is left open. In the event of a fire, the doors to the doors are often opened when evacuating. In this state, the fire source F and the head 11
It may not be possible to extinguish the fire depending on the positional relationship between 0 and the entrance (opening) 106A.

[0012] It is the entrance 1 where the finely divided water is open.
Because of the escape from the 06A and the high-pressure water discharge, the water discharge speed increases, which causes the generation of indoor convection, so that the oxygen required for combustion is supplied from the outside through the open port. Is probably the cause.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in such a manner that a constant sensitivity can be always obtained regardless of the position of a fire source by preventing a nozzle from projecting from a head body. Further, when the nozzle is attached to the head body, a closed type spray water discharge head for fire extinguishing and fire suppression, which can be attached so that the water discharge hole surface of the nozzle is substantially flush with the head body. By installing a head at the opening of the indoor space in the building, a water curtain (water curtain) is formed in the event of a fire, making the indoor space a pseudo-closed space, thereby supplying oxygen. It is an object of the present invention to provide a method of installing a spray discharge head which is stopped to a building.

[0014]

The gist of the invention is to provide a closed type for extinguishing and suppressing fire, in which, when a heat sensitive body is damaged by heat, water is atomized from a water discharge hole of a nozzle and discharged in a mist state. A closed spray water discharge head for extinguishing and suppressing fire, wherein a water discharge hole surface of a nozzle is substantially flush with an outer peripheral surface of a head main body.

In addition, a closed type spray water discharge head for fire extinguishing and fire suppression, comprising a plurality of nozzle mounting tool insertion holes provided on the water discharging hole surface of the nozzle of the head so as to sandwich the center of the nozzle, and as described above. A method for installing a closed-type spray water discharge head for fire extinguishing and fire suppression on a building, characterized in that the formed fire-extinguishing and fire suppression closed-type spray water discharge head is installed at the opening of the indoor space in the building. It is characterized by doing.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; 1 is a front view of a closed type spray water discharge head for extinguishing and suppressing fire, FIG. 2 is a bottom view of the same, FIG. 3 is an enlarged view of a nozzle, FIG. 4 is an operation explanatory view, and FIG. 5 is a perspective view of a mounting tool.

In the drawing, reference numeral 1 denotes a closed spray water discharge head for extinguishing and suppressing fire, which atomizes water from nozzles and discharges it in the form of mist. The fire-extinguishing and fire suppression closed spray water discharge head 1 has one or a plurality of nozzles 4, 4 attached to a head body 3 having an attachment portion 2 to a water discharge pipe,
Further, a heat sensitive body 6 is held at a lower end portion via a support member 5. 4a is a water discharge hole of the nozzle.

The nozzle 4 is attached to the head body 3 by a method of screwing into the recess or the hole, a method of press-fitting, a method of welding, or the like, but other methods may be used. Further, in the present embodiment, one water discharge hole 4a is provided for each nozzle. In addition, a glass bulb or a molten metal is used as the heat-sensitive element 6 that melts in a fire.

The above configuration is the same as that of the conventional closed spray water discharge head for extinguishing and suppressing fire. The feature of the present invention is that the surface of the water discharge hole 4 a of the nozzle 4, that is, the surface that becomes the surface when attached, is substantially flush with the outer peripheral surface of the head main body 3.

As a result, the nozzle 4 does not protrude from the head main body 3 as in the prior art, and therefore, as shown in FIG. 4, the hot air flow F1 flowing along the ceiling directly hits the heat sensitive body 6 without any resistance. . Thus, a constant sensitivity is always obtained regardless of the position of the fire source.

Furthermore, in the present embodiment, each nozzle 4 is provided with insertion holes 7, 7 of a mounting tool on the surface of the water discharge hole 4a so as to sandwich the center of the nozzle.
In this embodiment, two insertion holes 7 are provided for the mounting tool, but may be more than two.

As described above, the nozzle 4 is mounted almost flush with the head body 3 so as not to protrude from the head main body 3 as described above. Can not. For this reason, the insertion holes 7, 7 for the mounting tool are provided in the portion that becomes the surface when the nozzle 4 is mounted. As a result, for example, it is possible to perform the mounting with the use of the mounting tool 8 as shown in FIG. The mounting tool 8 includes a disk 10 provided with two projections 9, 9 to be inserted into the mounting tool insertion holes 7, 7 of the nozzle 4, a grip portion 11, and a connection between the disk 10 and the grip portion 11. It consists of a rod 12.

Next, an embodiment of a method for installing a closed type spray head for fire extinguishing and fire suppression according to the present invention on a building will be described with reference to FIGS.

In the figure, reference numeral 13 denotes an indoor space of a building. The interior space 13 has an entrance 14 as an opening, and the entrance 14 is connected to a corridor 15.
The closed spray water discharge head 1 for extinguishing and suppressing fire is installed on the ceiling of the indoor space 13. In addition, F shows a fire source.

A feature of the present invention resides in that the closed type spray water discharge head 1 for extinguishing and suppressing fire is provided above the entrance 14 which is an opening of the indoor space 13. In general, one installation is sufficient, but two or more installations may be performed.

Thus, a water curtain can be formed in the event of a fire, and the interior space 13 can be made a pseudo-closed space. Therefore, the supply of oxygen from the outside is stopped, and the efficiency of fire extinguishing can be increased.

Here, when a fire occurs near the entrance, which is an opening, the hot airflow from the fire source F flows directly toward the heat-sensitive part 6 to the head. Alternatively, as shown in FIG. 4, the water flows down the ceiling and flows to the head. Even in such a state, if the closed type spray water discharge head 1 for fire extinguishing and fire suppression is used, a stable sensitivity can be obtained and a pseudo closed space can be surely provided.

Further, the closed fire spraying and discharging head for fire extinguishing and fire suppression is installed in the indoor space of a building, and water is discharged to the opening of the indoor space in conjunction with the water spraying of the fire extinguishing and fire suppressing spraying and discharging head. May be installed to start the spraying.

Thus, when a fire occurs near the opening, the closed type spray water discharge head 1 for extinguishing and suppressing the fire is used.
In addition to extinguishing the fire by discharging water from the room, a water curtain can be formed, and the indoor space 13 can be a pseudo-closed space. Therefore, the supply of oxygen from the outside is stopped, and the efficiency of fire extinguishing can be increased.

However, a fire does not always occur from an entrance which is an opening. Therefore, when the water discharge head 1 is installed in at least two places (or more) in the indoor space and the opening, when the head installed in the indoor space detects a fire and starts water discharge, the hot air flow is cooled. In the meantime, it is conceivable that the head installed in the opening does not operate.

In order to prevent this, it is more desirable to provide a mechanism that operates the head installed in the opening in conjunction with the water discharging operation of the head in the indoor space. For example, providing a heater in the heat-sensitive part of the head installed in the opening, detecting the start of water discharge of the head installed in the indoor space, heating the heater when water discharge is started, and forcibly destroying the heat-sensitive part. Accordingly, it is possible to reliably operate the head installed in the opening.

The open type spray water discharge head installed at the entrance 14 which is the opening of the indoor space 13 is
The fire detection and fire start of the closed type spray water discharge head 1 for fire extinguishing and fire suppression installed near the central portion of the water supply system are linked with the start of water discharge.

For example, the following method can be considered as the method of linking. A method that utilizes the valve body descent in the head. When the thermal element 6 held by the head 1 is damaged as shown in FIG. 7, the valve element 1A held by the thermal element 6 descends as shown in FIG. Is started. Then, a connecting portion for connecting a pipe 1B branching from the head 1 to the opening is provided here, and a water passage is formed also in this portion by descending the valve body. In the case of this method, the processing of the head takes a little time, but when one fire extinguishing head is provided in one room, the construction is easy.

A mechanical method using an operation detection valve. Piping 1 for connecting water supply pipe and fire extinguishing head 1 as shown in FIG.
6 is provided with an operation detection valve 17, and the operation of the operation detection valve 17 constitutes a water channel leading to a pipe 19 branched to the opening side. Normally, pressure is applied to the pipe 16, and the valve 17 is held at a position where water is not passed through the pipe to the opening side by a balance between the pressure and the spring 20 biasing the valve 17. . One end of the spring 20 is attached to the valve 17, and the other end is attached to an attachment member 18 attached to the pipe 16.
And pressure of piping (pressure received by valve)
Is lowered, the spring 20 moves in the returning direction, and the returning force moves the valve 17 (to the right in the figure). Here, when the head senses a fire and starts discharging water, the pressure of the pipe temporarily drops. Due to this decrease in pressure, FIG.
As shown at 0, the valve 17 moves in the valve opening direction. The movement of the valve 17 forms a water passage leading to the pipe branched to the opening, and water is also discharged from the head provided in the opening. When the water discharge is started, the pressure in the pipe increases again, but at this time, the valve 17 is prevented from returning to the original position by the spring 20. Further, a mechanism (not shown) for holding the position of the valve 17 may be provided. After the water discharge, an operation of returning the valve 17 (an operation of extending the spring) may be performed. Although this method requires operation detection valves for the number of heads provided in the opening, reliable operation can be performed.

An electrical method using an operation detection device. Piping 1 for connecting water supply pipe and fire extinguishing head as shown in FIG.
6 is provided with an operation detecting device 21 in the middle thereof.
An operation signal is output to the control panel 22 by the operation of 1, and the electromagnetic valve 23 on the pipe branched to the opening is released by the control signal from the control panel 22. In addition, 1
Is a head installed in an indoor space, and 1 'is a head installed in an opening. Although this method requires electric wiring, no special processing is required for the head and the detection valve. Further, operation of a plurality of heads and remote operation of the heads are enabled.
Further, the control signal may be directly output from the detection device (the control panel is not used), or the detection device may be built in the head.

[0036]

The closed spray water discharge head for extinguishing and suppressing fire according to the present invention has the above-described structure and operation.
The sensitivity is better than the conventional one, and a constant sensitivity can always be obtained regardless of the position of the fire source.

Further, in the case where the insertion hole of the mounting tool is provided on the surface of the water discharge hole of the nozzle, it is possible to perform the operation when the nozzle is mounted substantially flush with the head main body.

According to the method for installing a closed type spray head for fire extinguishing and fire suppression according to the present invention on a building, a water curtain is provided at the opening of the indoor space at the time of fire.
And the indoor space can be a pseudo-closed space. Therefore, the supply of oxygen from the outside is stopped, and the efficiency of fire extinguishing can be increased. In addition, since water is atomized and released in the form of mist, the water stays for a long time, and a water curtain state can be maintained for a long time. In addition, smoke particles can be adsorbed and dropped by the finely divided water, and sacrifice caused by being spilled can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a closed-type spray water discharge head for extinguishing and suppressing fire.

FIG. 2 is a bottom view of a closed spray water discharge head for extinguishing and suppressing fire.

FIG. 3 is an enlarged view of a nozzle.

FIG. 4 is an operation explanatory view of a closed type spray water discharge head for extinguishing and suppressing fire.

FIG. 5 is a perspective view of a mounting tool.

FIG. 6 is an explanatory view of a method of installing a closed spray water discharge head for extinguishing and suppressing fire in a building.

FIG. 7 is an explanatory diagram of an example of a method of interlocking a head installed in an opening and a head installed in an indoor space, and shows a state in which a heat sensitive body is not damaged.

FIG. 8 shows a state in which the heat sensitive body is damaged in the example shown in FIG.

FIG. 9 is a diagram illustrating an example of how a head installed in an opening and a head installed in an indoor space are linked, and shows a state in which a pipe to the head in the opening is closed by a valve. .

10 shows a state where water is passed through a pipe to the head of the opening in the example shown in FIG. 9;

FIG. 11 is an explanatory diagram of an example of how to link a head installed in an opening and a head installed in an indoor space.

FIG. 12 is a front view of a conventional closed spray water discharge head for extinguishing and suppressing fire.

FIG. 13 is a bottom view of a conventional closed spray water discharge head for extinguishing and suppressing fire.

FIG. 14 is an explanatory view of a conventional closed-type spray water discharge head for extinguishing and suppressing fire, showing a case where a hot air flow directly hits from directly below.

FIG. 15 is an explanatory view of a conventional closed spray water discharge head for fire extinguishing and fire suppression, showing a case where a hot air stream hits a ceiling.

FIG. 16 is an enlarged view of a closed spray water discharge head for extinguishing and suppressing fire and a hot air flow in the state shown in FIG. 15;

FIG. 17 is an explanatory diagram of a fire extinguishing system for a fire occurring in an indoor space in a conventional building.

FIG. 18 is an explanatory diagram of a fire extinguishing range in the case of using a sprinkler.

FIG. 19 is an explanatory diagram of a fire extinguishing range in a case where water is atomized and discharged in a mist state.

FIG. 20 is an explanatory diagram of a problem in a case where water is atomized and discharged in a mist state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed type spray water discharge head for fire extinguishing and fire suppression 2 Attaching part to water discharge pipe 3 Head body 4 Nozzle 4a Nozzle water discharging hole 5 Support member of heat sensitive body 6 Heat sensitive body 7, 7 Insertion hole of mounting tool 8 Mounting tool 13 Construction Indoor space of goods 14 doorway (opening)

Claims (4)

[Claims] 1. A closed-type spray water discharge head for fire extinguishing and fire suppression, wherein when a heat-sensitive body is damaged by heat, water is atomized from a water discharging hole of a nozzle and discharged in a mist state.
A closed spray water discharge head for extinguishing and suppressing fire, wherein a water discharge hole surface of a nozzle is substantially flush with an outer peripheral surface of a head body. 2. A closed spray water discharge head for extinguishing and suppressing fire according to claim 1, wherein a plurality of nozzle mounting tool insertion holes are provided on the water discharge hole surface of the nozzle so as to sandwich the center of the nozzle. 3. The closed spray / water discharge head for fire suppression and fire suppression according to claim 1 or 2, wherein the closed spray / water discharge head for fire suppression and fire suppression is installed in an opening of an indoor space in a building. How to install the building. 4. The closed type spray for fire extinguishing and fire suppression according to claim 1 or 2, wherein the closed type spray spray head for fire extinguishing and fire suppression is installed in an indoor space of a building, and the fire extinguishing and fire suppressing closed spray is installed in an opening of the indoor space. A method for installing a spray water discharge head on a building, comprising installing an open type spray water discharge head that starts water discharge in conjunction with the water discharge of the water discharge head.