JP4009498B2 - Fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fire extinguishing facility that extinguishes a fire.
[0002]
[Prior art]
Conventionally, foam-type fire extinguishing facilities are generally widely provided in underground parking lots of buildings. This is because it is suitable for oil fires caused by gasoline and oil in vehicles. Sprinkler fire extinguishing equipment is usually installed on the floor (floor) where offices and dwelling units of the same building are located.
[0003]
[Problems to be solved by the invention]
In the conventional fire extinguishing equipment, the foam fire extinguishing equipment and the sprinkler fire extinguishing equipment are each provided with a pump and a water tank, and the pressurized water feeding device has not been shared. Then, this invention aims at sharing a pump in the system where a foam fire-extinguishing equipment and a 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 is provided with a foam fire-extinguishing pipe branched from the main pipe, and a pressurized water supply provided through the pipe on the base end side of the main pipe. A sprinkler provided between a main pipe and a fire extinguishing equipment having a device and a foam fire extinguishing unit having a mixer and a stock solution tank provided between the pressurized water supply apparatus and the main pipe pipe and, provided the mixer in parallel with the pipe which is provided in the middle, a bypass pipe for connecting the vertical main and the pressurized pumping water system, a base end of the bypass piping, the bypass arrangement And a blocking valve provided at a connecting portion of the pipe provided in the middle of the mixer, and the blocking valve is normally connected to the sprinkler pipe without passing through the mixer via the bypass pipe. Provided to supply water, and the stop valve When fire protection zone extinguishing piping is provided to generate said controlled to connect the pressure pumping water system and the mixer, is characterized in that flowing a stock solution of stock solution tank to the mixer.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a system diagram of a fire extinguishing facility according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a main pipe (main pipe), which is piped up in the vertical direction of a building (not shown). A sprinkler pipe and a foam fire-extinguishing pipe are branched from the main pipe 1. That is, in FIG. 1, a sprinkler fire extinguishing equipment 10 is provided on the left side of the main pipe 1, and a foam fire extinguishing equipment 20 is provided on the right side of the main pipe 1.
[0007]
On the proximal end side of the main pipe 1, a pressurized water supply device 3 is provided via a pipe 1 </ b> C. 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 equipment 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 the pump 5 is activated when a pressure drop in the pipe 1 </ b> C is detected.
[0008]
A foam fire extinguishing unit 6 is provided between the pressurized water supply device 3 and the main pipe 1. This foam fire-extinguishing unit 6 is provided with a blocking valve 9 comprising a mixer 7, a stock solution tank 8, and an electric 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 through the pipe 1D. The mixer 7 mixes the foam stock solution stored in the stock solution tank 8 and the water from the water tank 4 to generate a foam aqueous solution having a predetermined concentration. Although the foam and water mixing method is a pressure proportioner method, other methods such as a venturi proportioner method may be used.
[0010]
Between the pipe 1D, that is, between the mixer 7 and the stock solution tank 8, a stock solution blocking valve 9 (hereinafter also referred to as a blocking valve) is provided. This blocking valve 9 is normally closed and is opened in the event of a fire. More specifically, when a fire breaks out in a protected area where the foam fire extinguishing equipment 20 is provided, the opening is controlled so that the stock solution in the stock solution 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 main pipe 1, and a running water detector 12 is provided on the base end side thereof. A plurality of sprinkler heads 13 are connected to the sprinkler pipe 11. D1 is a fire detector and is installed in the same protected area as the sprinkler head 13. An open / close valve 15 is provided on the secondary side of the flowing water detection device 12 and is opened when the fire detector D1 detects a fire.
[0012]
As the flowing water detection device 12, for example, an NS valve disclosed in Japanese Patent Laid-Open No. 7-108069 can be used. The NS valve is a valve having two functions in addition to a flowing water detection function for detecting a flowing water phenomenon accompanying a pressure drop in a pipe. One function is a pressure-regulating and filling function that regulates the inside of the sprinkler pipe 11 to a predetermined pressure, and this pressure-regulating and filling function is performed by a pressure regulating pilot valve and an exhaust pressure pilot valve (not shown). Another function is a (valve opening) function as a valve, and this valve is controlled to open in the event of a fire. If this NS valve is used, the running water detection device 12 and the opening / closing valve 15 need not be provided separately. In addition, although the sprinkler fire extinguishing equipment 10 was demonstrated by the type of a pre-operation type, a normal wet type may be sufficient.
[0013]
Next, the foam fire extinguishing equipment 20 will be described. Reference numeral 21 denotes a foam fire-extinguishing pipe that is branched from the main pipe 1, and a running water detection device 22 is provided on the base end side thereof. Reference numeral 25 denotes a simultaneous opening valve provided in the middle of the foam fire-extinguishing pipe 21 to which a sensing pipe 27 is connected. A plurality of open-type 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, which is installed in the same protected area as the foam head 23.
[0014]
The foam fire extinguishing equipment 20 may be equipment that does not include the simultaneous opening valve 25. For example, a facility in which either a closed foam head or a closed spray head is 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 flow signal from the flow detector 22. Further, if necessary, an NS valve may be provided as in the sprinkler fire extinguishing equipment 10 to make it pre-actuated. The fire detector D2 in the figure is necessary only when the foam fire extinguishing equipment 20 is pre-operated, and the fire detector D2 is particularly provided when a fire in the protected area is detected by the sensing head 28. It does not have to be.
[0015]
In such a fire extinguishing equipment, in the normal monitoring state, the main pipe 1, the sprinkler pipe 11 and the foam fire extinguishing pipe 21 are filled with water. Such a water-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]
A control panel 30 is connected to the fire detectors D1 and D2 through different signal lines. Also, the running water detectors 12 and 22 are connected to each other by separate signal lines, and whether a fire has occurred in the protective area where the sprinkler fire extinguishing equipment 10 is installed or fire occurs in the protective area where the foam fire extinguishing equipment 20 is installed. It is possible to distinguish whether this occurred. The fire detectors D1 and D2 may have addresses without providing individual signal lines, or relays with addresses may be connected to the water flow detectors 12 and 22. In this way, it is possible to identify in which area the fire has occurred and the water has been discharged.
[0017]
The control panel 30 is also connected to the blocking valve 9 and the opening / closing valve 15 via a signal line, and opens the blocking valve 9 and the opening / closing valve 15 in the event of a fire. When a fire occurs only in a section where the sprinkler fire extinguishing equipment 10 is installed, the blocking valve 9 is closed without being opened.
[0018]
A case where a fire occurs in such a fire extinguishing facility 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 to send a fire signal to the control panel 30. The control panel 30 opens the on-off valve 15 and gives a predetermined fire alarm. Subsequently, when the sprinkler head 13 operates, the pressurized water in the sprinkler pipe 11 is released. Then, the flowing water detector 12 detects the reduced pressure or the flow of water in the pipe 11 and outputs a flowing 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 switch of the pressure air tank (not shown) detects the pressure drop, thereby starting the pump 5. When the pump 5 is activated, the water in the water tank 4 is pumped through the mixer 7 side and the main pipe 1 and supplied to the sprinkler pipe 11. At this time, since the blocking valve 9 is closed, the raw foam solution is not mixed with the pumped water. In this way, 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 extinguishing equipment 20 is installed will be described. When a fire occurs, the fire detector D2 operates to send a fire signal to the control panel 30. Subsequently, when the sensing head 28 is operated, 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]
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, the fire signal from the fire detector D2 and the water flow signal from the water flow 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 decompression in the pipe 1C is detected by a pressure air tank (not shown), the pump 5 is started. By starting the pump 5, the water in the water tank 4 is pumped through the mixer 7 side and the 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 water are mixed in the mixer 7, a foam aqueous solution having a predetermined concentration is generated, and supplied to the foam extinguishing pipe 21. In this way, the foam aqueous solution is discharged from the foam head 23 and the fire in the foam fire extinguishing equipment 20 is extinguished.
[0023]
By the way, at the initial stage of the fire, since the 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 an oil fire has the effect of sufficiently suppressing or preventing the spread of the fire by spraying and discharging water at a high pressure. Here, as a method of spraying and discharging water at a high pressure, for example, there is a method of increasing the rotational speed of the pump 5, and when there is a running water signal from the running water detector 22, the rotational speed of the pump 5 is increased for a predetermined time. What is necessary is just to make spray water discharge at a high pressure.
[0024]
In this embodiment, the blocking valve 9 is provided between the stock solution tank 8 and the mixer 7. However, the blocking valve 9 may be a three-way valve as shown in FIG. In FIG. 2, 1 </ b> B is a bypass pipe that is provided in parallel with the foam fire-extinguishing unit 6 and connects the main pipe 1 and the pressurized water supply device 3. 9C is a blocking valve composed of a three-way valve, and is provided at the base end side of the bypass pipe 1B, that is, at the connection portion between the bypass pipe 1B and the pipe 1C. G1 and G2 are check valves provided in the main pipe 1 and the bypass pipe 1B.
[0025]
In the state of FIG. 2, the blocking valve 9 </ b> C connects the pressurized water supply device 3 and the main pipe 1, and water from the pressurized water supply device 3 does not pass through the mixer 7 and enters the stock solution tank 8. No inflow. That is, in the normal state, the stop valve 9C is in the state shown in FIG. 2, and when a fire occurs in a protected area where the sprinkler fire extinguishing equipment 10 is located, 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 a protection area where the foam fire extinguishing equipment 20 is located, the stop valve 9C is rotated 90 degrees to the right. In this state, the blocking valve 9 </ b> C 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 from the undiluted solution tank 8 and the water from the pressurized water supply device 3 are mixed in the mixer 7 to form a foam aqueous solution having a predetermined concentration, thereby It will be supplied to the pipe 21.
[0027]
The effect as equipment in the system diagram of FIG. 2 is that water can be supplied to the sprinkler pipe 11 without passing through the mixer 7 in the event of a fire in the sprinkler fire extinguishing equipment 10. That is, the mixer 7 has a narrowed inside, and the pressure loss increases when the mixer 7 is passed.
[0028]
In addition, you may comprise the blocking valve 9 of FIG. 1 by the valve which can adjust an open degree. When a fire occurs in the protective compartment with the foam fire extinguishing equipment 20, the stop valve 9 is fully opened. When a fire occurs in the protective compartment with the sprinkler fire extinguishing equipment 10, the stop valve 9 is opened halfway. The state may be controlled to be opened. That is, you may make it adjust the quantity of the undiluted | mixed liquid mixed with fire extinguishing water according to an installation.
[0029]
【The invention's effect】
The present invention is configured as described above, and since the sprinkler pipe and the foam fire-extinguishing pipe are branched from the main pipe, the pressurized water supply device can be shared. In addition, only when there is a fire in the protected area where foam fire extinguishing piping is provided, the stop valve between the mixer and the stock solution tank is opened, so if a fire occurs in the protected area with sprinkler piping, only water is used. Can be discharged.
[0030]
Also, in the fire extinguishing equipment provided with a foam fire extinguishing unit, a bypass pipe is provided in parallel with the foam fire extinguishing unit, and the blocking valve is controlled so that the stock solution in the stock solution tank flows into the mixer. If a fire breaks out in a section without water, water can be supplied without passing through the mixer, thus preventing pressure loss by the mixer.
[Brief description of the drawings]
FIG. 1 is a system diagram of a fire extinguishing facility according to an embodiment of the present invention.
FIG. 2 is a system diagram showing another embodiment of the stop valve of the present invention.
[Explanation of symbols]
1 main pipe, 1C pipe, 1D pipe, 3 pressurized water supply device,
4 water tank, 5 pump, 6 foam fire extinguishing unit, 7 mixer,
8 Stock solution tank, 9 Stop valve, 1B Bypass piping,
10 sprinkler fire extinguishing equipment, 11 sprinkler piping,
12 Flowing water detection device, 13 Sprinkler head, 15 On-off valve,
20 foam extinguishing equipment, 21 foam extinguishing piping, 22 running water detection device,
23 foam head, 25 simultaneous release valve, 27 sensing pipe,
28 sensing head, 30 control panel, D1, D2 fire detector,

Claims (1)

A foam fire-extinguishing pipe branched from the main pipe, a pressurized water supply device provided via a pipe on the proximal end side of the main pipe, and between the pressurized water supply device and the main pipe In a fire extinguishing facility having a foam extinguishing unit provided with a mixer and a stock solution tank,
A sprinkler pipe branched from the main pipe,
A bypass pipe that is provided in parallel with the pipe provided in the middle of the mixer, and connects the main pipe and the pressurized water supply device;
The A base end of the bypass piping, and a blocking valve provided at the connection portion of the pipe which is provided in the middle of the mixer and the bypass piping,
The blocking valve is normally provided in a state of supplying water to the sprinkler pipe without passing through the mixer via the bypass pipe.
The stop valve is controlled to connect the pressurized water supply device and the mixer when a fire occurs in the protection area where the foam fire-extinguishing pipe is provided, and causes the stock solution in the stock solution tank to flow into the mixer. Fire extinguishing equipment characterized by that.

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