JP2003180861A - Fire extinguishing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a foaming water solution from flowing out when no fire occurs. <P>SOLUTION: Fire extinguishing equipment provided with a mixer 14 and an undiluted solution tank 16 storing a foaming undiluted solution is provided with a prevention valve 17 between the mixer and the undiluted solution tank to control the foaming water solution from flowing out from the inside of the undiluted solution tank when no fire occurs. A closed type water extinguishing head 28 is provided at the secondary side piping 27 of a water flow detector 10, and inside of the piping is filled with water in the case of monitoring. In the case of a fire, after discharging water from the water extinguishing head, the forming water solution is discharged. A normally closed remote opening valve 36 which opens for a fixed period in case of the fire is provided at the primary side piping 11 of the water flow detector to drain water inside of the piping. The water filling inside of the piping is replaced with the forming water solution. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fire extinguishing equipment for extinguishing a fire.

[0002]

2. Description of the Related Art Conventionally, foam fire extinguishing equipment is generally widely installed in underground parking lots of buildings. This is because it is suitable for oil fires such as gasoline and oil in vehicles. In a foam extinguishing facility, a foam aqueous solution stored in a stock solution tank is mixed with water from a water source to form a foam aqueous solution. At the time of caution, the foam aqueous solution is filled in the pipe. Then, at the time of fire, the aqueous foam solution is discharged from the foam head as a fire extinguishing head in the state of the aqueous solution, or is foamed and foamed.

[0003]

By the way, in a parking lot or the like in the summer, the temperature may become extremely high, the liquid in the pipe may expand, and the sensing head may explode. In addition, the vehicle may come into contact with the piping and the sensing head to damage the head, and the aqueous foam solution may flow out to the outside even though the fire is not a fire. When this foam aqueous solution flows out to the outside, some of it is not very good for the environment due to its physical properties. Therefore, an object of the present invention is to prevent the aqueous foam solution from flowing out to the outside except at the time of fire.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a mixer to which a water source is connected via a pipe on the proximal end side, and a mixer connected to the mixer, In a fire extinguisher equipped with a stock solution tank in which the stock solution is stored,
A blocking valve is provided between the mixer and the stock solution tank to control so that the foam stock solution does not flow out of the stock solution tank except when a fire occurs. Further, in a fire extinguishing equipment equipped with a flowing water detector connected to the secondary side of the mixer via a pipe and a fire extinguishing head provided in the secondary side pipe of the flowing water detector, water is not supplied to the pipe during monitoring. Is filled with water, the water is discharged from the fire extinguishing head at the time of fire, and then the aqueous foam solution is discharged. Further, the primary side pipe or the secondary side pipe is provided with a normally-closed remote opening valve that is opened for a certain period of time in the event of a fire to drain water in the pipe.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a system diagram of fire extinguishing equipment according to Embodiment 1 of the present invention. In FIG. 1, 10 is a running water detector installed in each protection section. A pipe connected to the primary side with reference to the flowing water detector 10 is referred to as a primary side pipe 11, and a pipe connected to the secondary side is referred to as a secondary side pipe 27. In a normal monitoring state, the primary side pipe 11 and the secondary side pipe 27 are filled with water. In the figure, the black-painted valve is normally closed and the white-painted valve is normally open.

The flowing water detector 10 is, for example, Japanese Patent Laid-Open No.
The NS valve disclosed in No. 108069 is used. Here, the NS valve has two functions in addition to a flowing water detection function for detecting a flowing water phenomenon caused by a pressure drop in the pipe. One is a pressure regulating water filling function that regulates the inside of the secondary side pipe 27 to a predetermined pressure, and this pressure regulating water filling function is performed by a pressure regulating pilot valve and a discharge pressure pilot valve (not shown).
The other function is a (valve opening) function as a valve, and this valve (not shown) is controlled so as to be opened at the time of fire. In the following description, the water flow detector 10 is also called an NS valve.

Reference numeral 11 denotes a primary side pipe, and a water tank (not shown) as a water source and a pump 13 are provided at the base end side to constitute a pressurized water supply device. A mixer 14 is provided in the middle of the primary side pipe 11. A stock solution tank 16 is connected to the mixer 14 via a pipe 15. The mixer 14 mixes the foam stock solution stored in the stock solution tank 16 and the water from the water tank to generate a foam aqueous solution having a predetermined concentration.

In the first embodiment, as a mixing method, a pressure proportioner method is used in which water is fed from the water tank side into the stock solution tank 16 through a water supply pipe to pressurize and discharge the foam stock solution in the tank 16. But,
There are several types of mixing methods, and for example, a method called a Venturi Proposer method may be used. In this case, when the water from the water tank pumped by the pump 13 passes through the mixer 14, the mixer 14 sucks the foamed stock solution in the stock solution tank 16 by the Venturi action.

In the pipe 15, from the mixer 14 side, a stock solution blocking valve 17 (hereinafter also referred to as a blocking valve), a liquid delivery check valve 18,
A liquid delivery sluice valve 19 is provided, and a manual stock solution blocking valve 17C is provided in parallel with the stock solution blocking valve 17. This stop valve 1
Reference numeral 7 is a valve that is normally closed and opens in the event of a fire.
In the figure, the blocking valve 17 is a mixer 14 and a stock solution tank 16.
Although the case where it is provided in the pipe 15 provided between and is shown, this blocking valve 17 may be provided in the water supply pipe that connects the stock solution tank 16 and the water tank side. The liquid delivery check valve 18 is provided when the pressure balance is unstable, such as when the equipment is initially started.
It is provided to prevent the water in the equipment pipe from flowing into the stock solution tank 16. Further, with such a piping system, since the differential pressure before and after the stock solution blocking valve 17 becomes 0 when the equipment is started, the torque required to open and close the blocking valve 17 can be small, and the manual operation becomes easy.

In the first embodiment, the mixer 14, the pipe 15, the stock solution tank 16, the stock solution blocking valves 17 and 17C, the solution delivery check valve 18 and the solution delivery sluice valve 19 are housed in one tank unit TU. There is. By installing this tank unit TU in the existing sprinkler fire extinguishing equipment, it becomes possible to switch the sprinkler fire extinguishing equipment to a fire extinguishing equipment using a foaming agent. A blocking valve may be configured by providing a three-way valve between the pipe branched from the liquid delivery pipe and the mixer 14, and connecting the three-way valve to the undiluted solution outlet of the undiluted solution tank 16.

From the secondary side of the mixer 14 of the primary side pipe 11, a normally closed manual valve 21 is provided in a branched manner. The valve 21 is an aqueous solution sampling port, which is opened at the time of inspection to collect the aqueous foam solution mixed in the mixer 14. The aqueous solution collection port 21 may be a three-way valve, and a fixed orifice or the like is provided to limit the flow rate. A water shutoff valve 22 that is normally open is provided on the secondary side of the valve 21 of the primary side pipe 11.

Reference numeral 23 denotes a pressure air tank connected to the primary side pipe 11 for maintaining the inside of the pipes 11 and 27 at a predetermined pressure. Reference numeral 24 is a jack pump connected to the pressure air tank 23, which is smaller than the pump 13. Further, reference numeral 25 is a priming tank connected to the pump 13.

Next, the secondary side of the flowing water detection device (container) 10 (NS valve) will be described. In the secondary pipe 27,
A plurality of closed fire extinguishing heads 28 are provided. An auxiliary water sparger 29 is provided at the end of the secondary pipe 27. The auxiliary sprinkler 29 protects a place where the fire extinguishing head 28 is difficult to install, such as a staircase or an electric room. When the built-in valve is opened and the hose is extended, water or a foam aqueous solution can be discharged from the nozzle at the tip. . The auxiliary sprinkler 29 may be provided not in the end of the secondary pipe 27 but in the middle thereof.

A fire detector 30 is provided in the protected area in which the fire extinguishing head 28 is installed. The fire detector 30 is connected to a fire receiver 32 via a signal line, and a fire extinguishing system control panel 33 (hereinafter referred to as a control panel) is connected to the fire receiver 32 via a signal line. This control panel 33
A water flow detector 10, a blocking valve 17, and a remote opening valve 36, which will be described later, are connected to this via a signal line. This control panel 33 is used for the fire receiver 3 when the fire detector 30 operates.
In response to the transfer signal from 2, the main valve of the NS valve 10, the blocking valve 17 and the remote opening valve 36 are controlled to open respectively. Further, the control panel 33 has a built-in timer and controls to close the remote opening valve 36 when a predetermined time has elapsed after opening the remote opening valve 36.

Reference numeral 34 is a rapid drainage portion provided by branching from the primary side pipe 11. The rapid drainage unit 34 has a constant flow valve 3
5 and a remote opening valve 36. The constant flow valve 35 is for making the flow rate in the pipe constant, and may use an orifice. An example of the constant flow valve 35 will be explained.
It has a water supply capacity of about 00 L / min, and the fire extinguishing head 38
If the water is discharged from 100 L / min, the flow rate of the constant flow valve 35 is set to 400 L / min.

The remote opening valve 36 is a normally closed valve,
When opened, the water in the primary side pipe 11 is drained to the outside via a drain pipe not shown or returned to the water tank via a pipe not shown. The remote release valve 36 is controlled by the control panel 33 so that it is opened for a certain time during a fire and closed after the elapse of the certain time.

Here, the fixed time is the time required for draining the water enclosed in the primary side pipe 11 in the event of a fire, in other words, the pump 13 is started and the aqueous foam solution mixed in the mixer 14 It is the time required to be sent to the secondary side pipe 27, that is, the time required for the water in the primary side pipe 11 to be replaced with the aqueous foam solution. This time is a value that is appropriately changed depending on conditions such as the position where the rapid drainage unit 34 is provided, the pipe diameter, and the pipe length. In addition, remote opening valve 3
A pilot valve 36C is connected to 6 and is opened by opening the pilot valve 36C and depressurizing or pressurizing the cylinder chamber of the remote opening valve 36.

In this fire extinguishing facility, the pump 13 is driven at the initial stage to supply the water in the water tank to the primary side pipe 11 side. At this time, the blocking valve 17 is closed. In this way, the aqueous solution of foam does not flow into the primary side pipe 11 and the secondary side of the flowing water detector 10, that is, the secondary side pipe 27, and only the water from the water source is enclosed. Only water is maintained.

A case where a fire occurs in such a fire extinguishing facility will be described. When a fire occurs in the protected area, the fire detector 30 first operates and the fire receiver 32
Send a fire signal to. Then, the fire receiver 32 sends a fire signal to the control panel 33. Here, the control board 33 controls to open the main valve of the NS valve 10.

When the fire extinguishing head 28 is subsequently operated, the pressurized water in the secondary pipe 27 is discharged. Then, the water flow detector 10 detects the pressure reduction or the flow of water in the pipe 27 and outputs a water flow signal to the control panel 33. Control board 3 here
Two signals, a fire signal and a running water signal, have been input to 3. By inputting these two signals, the control panel 33 determines that a fire has occurred, outputs an open signal, and opens the blocking valve 17 and the remote open valve 36. Further, the water in the secondary side pipe 27 is discharged from the fire extinguishing head 28, the inside of the primary side pipe 11 is decompressed, and the pressure switch (not shown) of the pressure air tank 23 detects the pressure decrease, so that the pump 13 is started. To be done.

When the pump 13 is started, the water in the water tank is pumped to the mixer 14 side. In addition, this water is the primary side pipe 11
Is supplied to the stock solution tank 16 through the water supply pipe. The foamed stock solution extruded from the tank 16 flows into the mixer 14 through the opened blocking valve 17. In the mixer 14, a foam aqueous solution having a predetermined concentration is generated, and the foam aqueous solution is supplied to the secondary side pipe 27 side. In this way, the aqueous foam solution passes through the water flow detector 10 and is discharged from the fire extinguishing head 28 to extinguish the fire.

Next, the operation of the remote opening valve 36 of the quick drain section 34 will be described. For example, in the case where a vehicle fire occurs in a parking lot or the like in a protective compartment, it is desirable to quickly discharge a foam aqueous solution suitable for an oil fire from the fire extinguishing head 28 to enhance fire extinguishing efficiency. However, in the fire extinguishing equipment of this embodiment, since the pipes 11 and 27 are filled with water at the time of monitoring from an environmental point of view, it is necessary to drain this water first. Therefore, in the event of a fire, the remote release valve 36 is opened to drain excess water to shorten the time it takes for water to be discharged from the fire extinguishing head 28, and the aqueous foam solution is discharged within about 10 minutes after the fire starts. To do so.

When the remote opening valve 36 is opened by the opening signal from the control panel 33, the water in the primary side pipe 11 is pumped by the pump 13 and drained. Then, after a lapse of a certain time, a foam aqueous solution having a predetermined concentration is generated from the mixer 14, the water in the primary side pipe 11 is replaced with the foam aqueous solution, and then the remote opening valve 36 is closed. Since the flow rate of water drained by the constant flow valve 35 is limited, a sufficient amount of water is discharged from the fire extinguishing head 28 even during drainage.

If the remote opening valve 36 is not opened when the fire extinguishing head 28 is operated, for a certain period of time,
Since only water is discharged from the fire extinguishing head 28, the fire extinguishing efficiency is not sufficient. Therefore, by providing the remote opening valve 36 in this manner, the primary side pipe 11 is normally operated.
It is possible to rapidly drain the water enclosed therein, and to quickly discharge from the fire extinguishing head 28 an aqueous foam solution having a higher extinguishing performance than water as a fire extinguishing agent.

By the way, at the initial stage of the fire, since water is filled in the secondary side pipe 27, water is discharged from the fire extinguishing head 28. At this time, it is preferable that water is discharged from the fire extinguishing head 28 at high pressure (about 4 kg / cm 2) as equipment. This is because even in an oil fire, spraying water at high pressure has the effect of sufficiently suppressing or preventing the spread of the fire. As described above, in this fire extinguishing facility, the pipes 11 and 27 are filled with water at the time of monitoring, and at the time of a fire, water is discharged from the fire extinguishing head 28 and then the aqueous foam solution is discharged. The spraying density from the fire extinguishing head 28 is 8 L / min · m2 by narrowing the pitch of the fire extinguishing heads 28 instead of spraying water at high pressure.
It may be raised to a high level, and this also helps prevent the spread of fire.

Next, a case where the fire extinguishing head 28 is damaged due to an unexpected accident or the like will be described. In this case, the water in the secondary pipe 27 flows out from the damaged fire extinguishing head 28. Here, the NS valve 10 is provided with a bypass pipe (not shown) that connects the primary side and the secondary side, and the pressure adjusting and filling function of the secondary side pipe 27 is performed through this bypass pipe. Therefore, the main valve of the NS valve 10 is closed, but the water in the primary side pipe 11 flows to the secondary side pipe 27 through this bypass pipe.

However, since the fire detector 30 is not operating, the blocking valve 17 remains closed.
Thus, the outflow of the aqueous foam solution to the secondary pipe 27 side is blocked. Therefore, since only the water flows out from the fire extinguishing head 28, it is possible to prevent the extinguishing agent from flowing out into the protective compartment when there is no fire (when there is no fire). As described above, in the fire extinguishing equipment of the present embodiment, the control panel 33 and the blocking valve 1
7, the foaming concentrate is controlled so as not to flow out of the concentrate tank 16 except during a fire.

As described above, during normal monitoring,
Only the water from the water source is enclosed in the primary side pipe 11 and the secondary side pipe 27 so that the aqueous foam solution is not mixed in the pipes 11 and 27. Therefore, at the time of non-fire, the foam extinguishing agent is completely outside. Do not leak. Therefore, fire extinguishing equipment good for the environment can be built.

In this fire extinguishing equipment, the case where the mixer 14 tests (inspects) whether or not a foam aqueous solution having a predetermined concentration is produced will be described. In this case, first, the water shutoff valve 22 is closed, the blocking valve 17C is manually opened, and the aqueous solution collection port 21 is further opened. Then, the pump 13 or the jack pump 24 is activated to collect a predetermined amount of the aqueous foam solution flowing out from the aqueous solution collection port 21 using a measuring instrument,
Measure to see if it reaches the specified concentration. After this, the stop valve 1
7C is closed, the pump 13 is operated until there is no stock solution remaining on the secondary side of the blocking valve 17C, the aqueous solution collection port 21 is closed, and finally the water shutoff valve 22 is opened.

By providing the aqueous solution sampling port 21 as described above, a large amount of the drug solution of the foam concentrate is not leaked to the outside,
It can be tested whether a proper aqueous foam solution is produced. Further, since the water shutoff valve 22 is closed during the test, the aqueous solution of bubbles does not enter the secondary side pipe 27 and the primary side pipe 11, so that the state where only the water is enclosed in the normal pipes 11 and 27 is maintained. be able to.

Next, a method of measuring the aqueous solution replacement time until the water in the pipes 11 and 27 is changed to the aqueous foam solution will be described. For example, the stock solution tank 16 is replaced with a tank containing colored water (solution for inspection) only during the test. Then, the valve of the auxiliary sprinkler 29 is opened to create the same state as when the fire extinguishing head 28 is opened during a fire. From the control panel 33 to N
An open signal is output to the S valve 10 and the remote open valve 36.

In this way, the colored water and the water are mixed in the mixer 1.
The water is forcibly discharged from the rapid drainage unit 34 while being mixed in 4. After a lapse of a predetermined time, colored water comes out from the nozzle of the auxiliary sprinkler 29 and the remote opening valve 36, so that the replacement time can be measured respectively. Further, a terminal test valve may be provided instead of the auxiliary sprinkler 29, and the time until the test liquid is discharged from the terminal test valve may be measured. Here, colored water is used as the test liquid, but a pipe cleaning liquid may be used to clean the inside of the pipe. As a facility, a test tank containing the test liquid may be permanently installed, and the test blocking valve provided between the test tank and the mixer 14 may be opened only during the test.

The inspection (test) of the fire extinguishing equipment includes a test using a fire extinguishing agent (foam aqueous solution) (interlocking start test) and a test not using a fire extinguishing agent (water discharge test). Depending on the difference between these tests. The control of the blocking valve 17 may be changed. For example, since the water discharge test confirms that water is normally discharged, the blocking valve 17 is not opened even if there is a running water signal during the water discharge test. Further, the interlocking test confirms whether the valve is normally interlocked with the signal to open and close. Therefore, during the interlocking test, the blocking valve 17 is controlled to be opened by the running water signal. This control pattern is the control panel 33
It is possible to register in. During this interlocking test, the water shutoff valve 22 or the liquid delivery sluice valve 19 is closed and the tank 16 is closed.
Make sure that the stock solution inside does not flow to the side of the secondary pipe 27.

Embodiment 2 Another embodiment of the rapid drainage section 34 will be described. Although a timer is built in the control panel 33 to control the opening time of the remote opening valve 36, it may be set as follows. An electric conductivity meter, a sugar meter, or a refractive index measuring device is provided at an appropriate location of the rapid drainage section 34 or the pipes 11, 27. Since the electrical conductivity, sugar content, or refractive index are different between the aqueous foam solution and water, if these instruments are installed in the pipes 11 and 27,
It is possible to detect that water has been replaced by a foam aqueous solution in the event of a fire.
Then, when it is detected that the foam aqueous solution has been replaced, the remote opening valve 36 is controlled to be closed.

In a small-scale facility having only one running water detector 10 as shown in FIG. 1, the water in the secondary side pipe 27 is immediately replaced with the aqueous foam solution at the time of a fire, so that the rapid drain section 34 is provided. The need is low. On the other hand, for example, in the case of a 10-story building, if a fire breaks out on the 9th floor,
Since the primary side pipe 11 is long, the necessity of providing the rapid drainage section 34 becomes high. In this case, the rapid drainage part 34 is provided at the uppermost part of the rising main pipe (primary pipe) called a vertical pipe.

In the case of this 10-story building, for example, the rapid drainage section 34 is operated only in the case of a fire on the fourth floor or above, and the rapid drainage section 34 is not operated in the fire on the first to third floors below it. It is also possible to do so, and the time when the remote opening valve 36 is opened may be changed for each fire occurrence floor. Further, the rapid drainage unit 34 may be installed at the end of the secondary pipe 27 or the farthest pipe on the primary side of the flowing water detector 10. Further, the remote opening valve 36 may be controlled so as to be opened immediately when the fire detector 30 is operated, which makes it possible to discharge the aqueous foam solution almost at the same time when the fire extinguishing head 28 is opened.

Embodiment 3 Another embodiment of the stock solution blocking valve 17 will be described. The blocking valve 17 may be always open. In this case,
When the water flow detector 10 operates and a water flow signal is generated, if the fire signal from the fire detector 30 is not generated, the control panel 33 controls the opened blocking valve 17 to be closed. In addition to the pump 13 for pumping the water in the water tank, another pump is provided, and the water supply piping is eliminated so that water can be supplied into the stock solution tank 16 only in case of fire by using this pump. 17 may not be provided.
When the fire is not an oil fire but a normal fire, the fire may be extinguished with water without opening the blocking valve 17. By providing the blocking valve 17 in this manner, it is possible to select between fire extinguishing with water and fire extinguishing with an aqueous foam solution according to the fire state.

Other Embodiments The present invention is characterized by sealing water in the blocking valve 17, the rapid drainage section 34, and the pipe at the normal time. Therefore, since other elements of the fire extinguishing equipment are not particularly limited, this point will be described.

In the first embodiment, the fire extinguishing head 28
Although a closed type head such as a sprinkler head has been described as above, a closed type foam head or an open type head may be used. Although a special water flow detector called the NS valve 10 is used, a normal pre-operation valve may be used, or an electrically operated valve and a water flow detector may be separately provided.

As the fire extinguishing equipment, wet pre-operated equipment has been taken as an example, but the secondary side pipe 27 may be dry type, and the valve is not pre-operated but is opened only by decompressing the inside of the pipe 27. The present invention may be applied to a normal sprinkler fire extinguishing equipment using the above or a foam fire extinguishing equipment using a simultaneous opening valve.
In this case, since the fire sensor 30 is not necessary, the blocking valve 17 and the remote opening valve 36 are opened when the flow signal of the running water detector 10 is generated, and the blocking valve 17 and the like. Control to open.

A fire judgment switch may be provided on the control panel 33, and when the fire judgment switch is pressed, control may be performed in the same manner as when there is a fire signal from the fire detector 30.
That is, when the fire judgment switch is pressed and a water flow signal is generated, the blocking valve 17 is opened and the remote opening valve 36 is opened. Further, when the line of the fire detector 30 is broken or fails, the fire receiver 32 outputs a failure signal to the control panel 33. When receiving this failure signal, the control panel 33 opens the blocking valve 17 and the remote opening valve 36 even if there is no fire signal.

Further, as in JP-A-10-24119,
In equipment in which one pump is used for both the sprinkler fire extinguishing equipment and the foam fire extinguishing equipment, control is performed so that the blocking valve 17 and the remote opening valve 36 are not opened even if the fire sensor of the sprinkler fire extinguishing equipment issues a warning. .

Although it has been stated that only the water is enclosed in the pipes 11 and 27, for example, in a cold region, the water in the secondary pipe may freeze, so that the proximal end side of the secondary pipe 27 may be frozen. Alternatively, a check valve may be provided on the secondary side, and the antifreeze liquid may be sealed on the secondary side of the check valve.

[0044]

According to the present invention, the normally closed blocking valve that is opened in the event of a fire is provided between the mixer and the stock solution tank, so that only water will flow out from the fire extinguishing head when there is no fire.
Therefore, it is possible to prevent the foam extinguishing agent from spilling into the protective compartment when there is no fire. In addition, normally, only the water from the water source is enclosed in the primary side pipe and the secondary side pipe to prevent the aqueous foam solution from mixing in the pipe, so even if it is operated during the test (inspection), Even if the fire extinguisher breaks down or breaks, no foam extinguishant will flow out. Therefore, fire extinguishing equipment good for the environment can be built.

Since a normally open remote opening valve that opens for a certain period of time in the event of a fire is provided on the base end side of the secondary side pipe, the water normally enclosed in the primary side pipe at normal times can be quickly drained. It is possible to quickly discharge water from the fire extinguishing head as a fire extinguishing agent by using a foam aqueous solution having a higher fire extinguishing performance than water.

[Brief description of drawings]

FIG. 1 is a system diagram of a fire extinguishing facility according to a first embodiment of the present invention.

[Explanation of symbols]

10 water flow detector (NS valve), 11 primary side piping, 14 mixer, 16 stock solution tank, 17 blocking valve, 21 aqueous solution sampling port, 27 secondary side piping, 28 fire extinguishing head, 30 fire detector, 32 fire receiver ,
33 control panel, 34 rapid drainage section, 35 constant flow valve,
36 Remote open valve,

Claims (6)

[Claims] 1. A fire extinguishing facility comprising a mixer to which a water source is connected to a base end side through a pipe, and a stock solution tank which is connected to the mixer and stores a stock solution of foam. A fire-extinguishing facility, characterized in that a blocking valve is provided between the stock solution tank and the stock solution tank so as to prevent the stock solution of foam from flowing out of the stock solution tank except during a fire. 2. A flowing water detector connected to the secondary side of the mixer via a pipe, and a closed type fire extinguishing head provided on the secondary side pipe of the flowing water detector, and monitoring in the pipe. The fire extinguisher equipment according to claim 1, wherein the fire extinguishing head discharges water from the fire extinguishing head at the time of fire and then discharges the foam aqueous solution. 3. A mixer to which a water source is connected via a pipe on the base end side, a stock solution tank connected to the mixer and storing a foam stock solution, and a pipe on the secondary side of the mixer. In a fire extinguisher equipped with a flowing water detector connected to the above, and a fire extinguishing head provided on a secondary side pipe of the flowing water detector, the pipe is filled with water at the time of monitoring, and the fire extinguishing head at the time of fire. Fire extinguishing equipment characterized by discharging water from a foam solution after discharging water from it. 4. A normally open remote opening valve that opens for a certain time in the event of a fire is provided in the primary side pipe or the secondary side pipe of the water flow detector, and the water in the pipe is drained. Extinguishing equipment described. 5. A running water detector, a primary side pipe connected to the primary side of the running water detector and provided with a water source on the base end side, and a secondary side of the running water detector, and a fire extinguishing head. In a fire extinguishing facility provided with a secondary side pipe provided, the primary side pipe or the secondary side pipe is provided with a normally-closed remote opening valve that opens for a certain period of time in the event of a fire to allow water in the pipe to drain. Characteristic fire extinguishing equipment. 6. A mixer provided with a water source connected to a proximal end side through a pipe, and a stock solution tank connected to the mixer and storing a stock solution of foam, the pipe being filled with water at the time of fire. The fire extinguishing equipment according to claim 5, wherein water is replaced with a foam aqueous solution.