JP2004041393A - Fire-extinguishing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the common use of a pump in a system having a mixture of foam fire extinguishing equipment and sprinkler fire extinguishing equipment. <P>SOLUTION: The common use of the pump 5 is achieved in the system having a mixture of the foam fire extinguishing equipment 20 and the sprinkler fire extinguishing equipment 10. In other words, in the fire extinguishing equipment provided with sprinkler piping 11 being branched off the vertical main pipe 1 and with a pressure water feeder 3 on the base end side of the vertical main, foam fire extinguishing piping 21 is provided being branched off the vertical main. A foam fire extinguishing unit 6 equipped with a mixer 7 and a raw liquid tank 8 is disposed between the pressure water feeder 3 and the vertical main pipe 1. Only when fires break out in the protection zone where the foam fire extinguishing piping 21 is provided, a blocking valve is opened to supply a foam solution. In short, when fires break out in the protection zone A2 where the foam fire extinguishing piping 21 is provided, the blocking valve 9 existing between the mixer and the raw liquid tank is opened and controlled. In parallel with the foam fire extinguishing unit 6, bypass piping 1B is provided to connect the vertical main pipe 1 to the pressure water feeder 3. When fires break out in the protection zone A1 of the sprinkler equipment, water is supplied through the bypass piping. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fire extinguishing system for extinguishing a fire.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, foam-type fire extinguishing equipment is generally widely provided in an underground parking lot of a building. This is because it is suitable for an oil fire caused by gasoline or oil of a vehicle. A floor (floor) where offices and dwelling units of the same building are located is usually provided with a sprinkler fire extinguishing system.
[0003]
[Problems to be solved by the invention]
In the conventional fire extinguishing equipment, a pump and a water tank are provided in each of the foam fire extinguishing equipment and the sprinkler fire extinguishing equipment, and the pressurized water supply device has not been shared. Therefore, an object of the present invention is to share a pump in a system in which foam fire extinguishing equipment and sprinkler fire extinguishing equipment coexist.
[0004]
[Means for Solving the Problems]
The present invention has been made in order to solve the above problems, and in a fire extinguisher in which a sprinkler pipe is provided by branching from a vertical main pipe and a pressurized water supply device is provided at a base end side of the vertical main pipe, The present invention is characterized in that a foam fire extinguishing pipe is branched from the main pipe and provided.
[0005]
Further, in a fire extinguishing system in which a foam fire extinguishing unit provided with a mixer and a stock solution tank is provided between a pressurized water supply device and a vertical main pipe, the foam main unit is provided in parallel with the foam fire extinguishing unit, and A bypass pipe for connecting to a water device; and a blocking valve provided in the bypass pipe, wherein the blocking valve is controlled so that the stock solution in the stock solution tank flows into the mixer. [0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a system diagram of a fire extinguishing system according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a vertical main pipe (main pipe) which is set up and piped in a vertical direction of a building (not shown). From the vertical main pipe 1, a sprinkler pipe and a foam fire extinguishing pipe are provided in a branched manner. That is, in FIG. 1, a sprinkler fire extinguishing equipment 10 is provided on the left side of the vertical main pipe 1, and a foam fire extinguishing equipment 20 is provided on the right side of the vertical main pipe 1.
[0007]
At the base end of the vertical main pipe 1, a pressurized water supply device 3 is provided via a pipe 1C. The pressurized water supply device 3 includes a water tank 4 and a pump 5, and supplies water in the water tank 4 to the fire extinguishing facilities 10 and 20 in the event of a fire. A known pressure air tank (not shown) is provided on the secondary side of the pump 5, and starts the pump 5 when a decrease in the pressure in the pipe 1C is detected.
[0008]
A foam fire extinguishing unit 6 is provided between the pressurized water supply device 3 and the vertical main pipe 1. The foam fire extinguishing unit 6 includes a mixer 7, a stock solution tank 8, and a blocking valve 9 composed of a motor-operated valve.
[0009]
The mixer 7 is provided in the middle of the pipe 1C, and the mixer 7 is connected to the stock solution tank 8 via the pipe 1D. The mixer 7 mixes the foam stock solution stored in the stock solution tank 8 with water from the water tank 4 to generate a foamed aqueous solution having a predetermined concentration. The method of mixing foam and water is the pressure proportioner method, but other methods such as the venturi proportioner method may be used.
[0010]
A stock solution check valve 9 (hereinafter also referred to as a check valve) is provided between the pipe 1D, that is, between the mixer 7 and the stock solution tank 8. This blocking valve 9 is a valve which is always closed and opened in the event of a fire. More specifically, when a fire occurs in the protection area where the foam fire extinguishing equipment 20 is provided, the opening is controlled, and the stock solution in the stock tank 8 flows into the mixer 7.
[0011]
Next, the sprinkler fire extinguishing equipment 10 will be described. Reference numeral 11 denotes a sprinkler pipe branched from the vertical main pipe 1, and a running water detection device 12 is provided at a base end thereof. A plurality of sprinkler heads 13 are connected to the sprinkler pipe 11. D1 is a fire detector, which is installed in the same protection area as the sprinkler head 13. Reference numeral 15 denotes an on-off valve, which is provided on the secondary side of the flowing water detection device 12, and opens when the fire detector D1 detects a fire.
[0012]
As the flowing water detecting device 12, for example, an NS valve disclosed in Japanese Patent Application Laid-Open No. 7-108069 or the like can be used. The NS valve is a valve having two functions in addition to a function of detecting flowing water that detects a phenomenon of flowing water caused by a decrease in pressure in the piping. One function is a pressure adjusting and filling function for adjusting the pressure in the sprinkler pipe 11 to a predetermined pressure, and the pressure adjusting and filling function is performed by a pressure adjusting pilot valve and an exhaust pressure pilot valve (not shown). The other function is a (valve opening) function as a valve, in which the valve is controlled to open in the event of a fire. If this NS valve is used, it is not necessary to separately provide the flowing water detection device 12 and the on-off valve 15. Although the sprinkler fire extinguishing system 10 has been described as a pre-operation type, it may be a normal wet type.
[0013]
Subsequently, the foam fire extinguisher 20 will be described. Reference numeral 21 denotes a foam fire extinguishing pipe branched from the vertical main pipe 1, and a flowing water detecting device 22 is provided at a base end thereof. Reference numeral 25 denotes a simultaneous release valve provided in the middle of the foam fire extinguishing pipe 21, and a sensing pipe 27 is connected thereto. A plurality of open foam heads 23 (hereinafter, referred to as foam heads) are connected to the foam fire extinguishing pipe 21. A plurality of sensing heads 28 are connected to the sensing pipe 27. D2 is a fire detector installed in the same protection area as the foam head 23.
[0014]
The foam fire extinguisher 20 may be a facility that does not include the simultaneous release valve 25. For example, a facility in which either a closed type foam head or a closed type spray head is simply connected to the foam fire extinguishing pipe 21 may be used. In this case, the blocking valve 9 is controlled to be opened by a flowing water signal of a flowing water detector 22. If necessary, an NS valve may be provided as in the case of the sprinkler fire extinguishing system 10 to be a pre-operation type. The fire detector D2 in the figure is necessary only when the foam fire extinguishing system 20 is to be pre-actuated. When the detection head 28 detects a fire in a protected area, the fire detector D2 is particularly provided. It is not necessary.
[0015]
In such a fire extinguishing system, in a normal monitoring state, the vertical main pipe 1, the sprinkler pipe 11, and the foam fire extinguishing pipe 21 are filled with water. Such a filled state can be created by closing the blocking valve 9 and driving the pump 5 to supply the water in the water tank 4 at the initial stage.
[0016]
Reference numeral 30 denotes a control panel, which is connected to the fire detectors D1 and D2 by different signal lines. In addition, they are also connected to the flowing water detection devices 12 and 22 by different signal lines, respectively, and whether a fire has occurred in the protection section where the sprinkler fire extinguishing equipment 10 is installed or in the protection section where the foam fire extinguishing equipment 20 is installed. It has become possible to distinguish whether or not the occurrence has occurred. It should be noted that the fire detectors D1 and D2 may have an address without providing a separate signal line, or a relay with an address may be connected to the running water detectors 12 and 22. Even in this manner, it is possible to identify in which area a fire has occurred and water has been discharged.
[0017]
The control panel 30 is also connected to the blocking valve 9 and the on-off valve 15 via a signal line, and opens the blocking valve 9 and the on-off valve 15 in the event of a fire. When a fire occurs only in the section where the sprinkler fire extinguishing equipment 10 is installed, the blocking valve 9 is closed without opening.
[0018]
A case where a fire occurs in such a fire extinguishing system will be described. First, a case where a fire occurs in the protection area (A1) where the sprinkler fire extinguishing equipment 10 is installed will be described. When a fire occurs, the fire detector D1 operates and sends a fire signal to the control panel 30. The control panel 30 opens the on-off valve 15 and issues a predetermined fire alarm. Subsequently, when the sprinkler head 13 operates, the pressurized water in the sprinkler pipe 11 is discharged. Then, the running water detector 12 detects the reduced pressure or the flow of water in the pipe 11 and outputs a running water signal to the control panel 30.
[0019]
Further, the water in the sprinkler pipe 11 is discharged from the sprinkler head 13, the pressure in the pipe 1C is reduced, and the pressure drop in the pressure air tank (not shown) detects the pressure drop, so that the pump 5 is started. When the pump 5 is started, the water in the water tank 4 is pressure-fed through the mixer 7 and the vertical main pipe 1 and supplied to the sprinkler pipe 11. At this time, since the blocking valve 9 is closed, the foamed liquid does not mix with the water being pumped. Thus, water is discharged from the sprinkler head 13 to extinguish the fire.
[0020]
Next, a case where a fire occurs in the protection area (A2) where the foam fire extinguishing equipment 20 is installed will be described. When a fire occurs, the fire detector D2 operates and sends a fire signal to the control panel 30. Subsequently, when the sensing head 28 operates, the pressurized water in the sensing pipe 27 flows out. Then, the simultaneous release valve 25 is opened, and the water in the foam fire extinguishing pipe 21 is discharged from the foam head 23.
[0021]
Then, the flowing water detector 22 detects the reduced pressure or the flow of water in the pipe 21, and outputs a flowing water signal to the control panel 30. Here, two signals of the fire signal from the fire detector D2 and the running water signal of the running water detector 22 are input to the control panel 30. Based on the input of these two signals, the control panel 30 determines the occurrence of a fire, outputs an open signal, and opens the blocking valve 9.
[0022]
Subsequently, when the reduced pressure in the pipe 1C is detected by a pressure air tank (not shown), the pump 5 is started. When the pump 5 is started, the water in the water tank 4 is pumped through the mixer 7 and the vertical main pipe 1 and supplied to the foam fire-extinguishing pipe 21. At this time, since the blocking valve 9 is open, the undiluted solution in the undiluted solution tank 8 and the water are mixed in the mixer 7 to generate a foamed aqueous solution having a predetermined concentration, which is supplied to the foam fire extinguishing pipe 21. In this way, the foam aqueous solution is released from the foam head 23, and the fire in the foam fire extinguishing equipment 20 is extinguished.
[0023]
By the way, in the initial stage of the fire, since the vertical main pipe 1 and the foam fire extinguishing pipe 21 are filled with water, the water is discharged from the foam head 23. At this time, it is preferable that water is discharged from the foam head 23 at a high pressure (about 4 kg / cm 2). This is because even in the case of an oil fire, spraying and discharging water at a high pressure has an effect of sufficiently suppressing or preventing the spread of the fire. Here, as a method of spraying and discharging water at a high pressure, for example, there is a method of increasing the rotation speed of the pump 5, and when there is a flowing water signal from the flowing water detector 22, the rotation speed of the pump 5 is increased for a predetermined time. What is necessary is just to spray and discharge at high pressure.
[0024]
In the present embodiment, the stop valve 9 is provided between the stock solution tank 8 and the mixer 7, but the stop valve 9 may be constituted by a three-way valve as shown in FIG. In FIG. 2, reference numeral 1B denotes a bypass pipe which is provided in parallel with the foam fire extinguishing unit 6, and connects the vertical pipe 1 and the pressurized water supply device 3. Reference numeral 9C denotes a blocking valve formed of a three-way valve, which is provided on the base end side of the bypass pipe 1B, that is, at a connection portion between the bypass pipe 1B and the pipe 1C. G1 and G2 are check valves provided in the vertical main pipe 1 and the bypass pipe 1B.
[0025]
In the state of FIG. 2, the blocking valve 9C connects the pressurized water supply device 3 to the vertical main pipe 1, and water from the pressurized water supply device 3 does not pass through the mixer 7 but enters the stock solution tank 8. Also do not flow. That is, at normal time, the check valve 9C is in the state shown in FIG. 2, and when a fire occurs in the protection area where the sprinkler fire extinguishing equipment 10 is present, only water is passed through the bypass pipe 1B in this state. It is supplied to the sprinkler pipe 11.
[0026]
On the other hand, when a fire occurs in the protection area where the foam fire extinguishing equipment 20 is provided, the rotation of the check valve 9C is controlled to the right by 90 degrees. In this state, the blocking valve 9C connects the pressurized water supply device 3 and the mixer 7, and causes the water from the pressurized water supply device 3 to flow into the stock solution tank 8. As a result, the undiluted solution in the undiluted solution tank 8 flows into the mixer 7, and the undiluted solution flowing out of the undiluted solution tank 8 and the water from the pressurized water supply device 3 are mixed in the mixer 7 to form a foamed aqueous solution having a predetermined concentration, thereby extinguishing the foam. It will be supplied to the pipe 21.
[0027]
The effect of the equipment in the system diagram of FIG. 2 is that water can be supplied to the sprinkler piping 11 without passing through the mixer 7 at the time of fire in the sprinkler fire extinguishing equipment 10. That is, the inside of the mixer 7 has a narrowed shape, and the pressure loss increases when the mixer 7 is passed through.
[0028]
Note that the blocking valve 9 in FIG. 1 may be configured by a valve whose degree of opening can be adjusted. Then, when a fire occurs in the protection section with the foam fire extinguishing equipment 20, the check valve 9 is fully opened, and when a fire occurs in the protection section with the sprinkler fire suppression equipment 10, the check valve 9 is half-opened. The state may be controlled to be released. That is, the amount of the stock solution mixed with the fire extinguishing water may be adjusted according to the equipment.
[0029]
【The invention's effect】
The present invention is configured as described above, and the sprinkler pipe and the foam fire extinguishing pipe are branched from the vertical main pipe, so that the pressurized water supply device can be shared. Also, only when a fire occurs in the protected area where the foam fire extinguishing pipes are provided, the stop valve between the mixer and the stock tank is opened, so if a fire occurs in the protected area with sprinkler pipes, only water is discharged. Can be discharged.
[0030]
Also, in the fire extinguishing equipment equipped with a foam fire extinguishing unit, a bypass pipe is provided in parallel with the foam fire extinguishing unit, and a stop valve is controlled so that the stock solution in the stock solution tank flows into the mixer. If a fire occurs in an unoccupied section, water can be supplied without passing through the mixer, so that pressure loss due to the mixer can be prevented.
[Brief description of the drawings]
FIG. 1 is a system diagram of a fire extinguishing system according to an embodiment of the present invention.
FIG. 2 is a system diagram showing another embodiment of the blocking valve of the present invention.
[Explanation of symbols]
1 vertical main pipe, 1C pipe, 1D pipe, 3 pressure water supply device,
4 water tank, 5 pump, 6 foam fire extinguishing unit, 7 mixer,
8 stock solution tank, 9 check valve, 1B bypass pipe,
10 sprinkler fire extinguishing equipment, 11 sprinkler piping,
12 running water detection device, 13 sprinkler head, 15 on-off valve,
20 foam fire extinguishing equipment, 21 foam fire extinguishing piping, 22 running water detection device,
23 foam head, 25 simultaneous release valve, 27 sensing piping,
28 sensing head, 30 control panel, D1, D2 fire detector,

Claims (4)

In a fire extinguisher equipped with a sprinkler pipe branched from a vertical main pipe and a pressurized water supply device provided at a base end side of the vertical pipe, a foam fire extinguishing pipe is branched from the vertical main pipe and provided. Fire extinguishing equipment. A foam extinguishing unit equipped with a mixer and a stock solution tank is provided between the pressurized water supply device and the vertical main pipe, and when a fire occurs in a protected area where the foam extinguishing pipe is provided, the mixer and the 2. The fire extinguishing system according to claim 1, wherein a valve between the stock tanks is controlled so that the stock solution in the stock tank flows into the mixer. A foam fire extinguishing unit provided between the pressurized water supply device and the vertical main pipe, and a bypass pipe provided in parallel with the foam fire extinguishing unit and connecting the vertical main pipe and the pressure water supply apparatus, The fire extinguishing system according to claim 1, wherein when a fire occurs in a protection area where the sprinkler pipe is provided, water is supplied to the sprinkler pipe via the bypass pipe. In a fire extinguishing system, a foam extinguishing unit equipped with a mixer and a stock solution tank is provided between the pressurized water supply device and the vertical main pipe,
A bypass pipe that is provided in parallel with the foam fire extinguishing unit and connects the vertical main pipe and the pressurized water supply device; and a check valve provided in the bypass pipe. A fire extinguishing system characterized by allowing the stock solution in the tank to flow into the mixer.

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