JP2017086175A - Foam fire extinguishing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foam fire extinguishing system capable of preventing discharge of a foam fire extinguishing agent when a manual start valve is operated by mischief, etc.SOLUTION: A foam fire extinguishing system includes: a main pipeline 2 for pressure-feeding a foam fire extinguishing agent and discharging it from a foam head 8 provided at the tip side, a deluge valve 14, a sensing pipeline 16, a fire sensing head 17 attached to the sensing pipeline 16, a manual start valve 20, and a fire extinguishing agent erroneous discharge prevention system B for preventing discharge of the foam fire extinguishing agent by an erroneous operation of the manual start valve 20. The fire extinguishing agent erroneous discharge prevention system B includes: a limit switch 21 for detecting an on-off state of the manual start valve 20; an on-off valve 22 provided to the sensing pipeline 16; and a control device 19 that receives a manual start valve opening signal from the limit switch 21, and executes opening control for the on-off valve 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foam fire extinguishing apparatus that is installed in a building / facility such as an underground parking lot, a factory, or a building and that extinguishes fire by releasing a fire extinguishing foam from a foam head in the event of a fire.

  For example, in buildings and facilities such as underground parking lots, factories, buildings, etc., as a fire extinguisher, water and foam extinguishing liquid (foam extinguishing agent) are mixed at a fixed ratio in the event of a fire to produce a foam extinguishing agent, and foam extinguishing agent Foam fire extinguishing equipment is widely used to release the gas from the foam head (see, for example, Patent Document 1 and Patent Document 2).

  Such a foam extinguisher can effectively extinguish a fire by the suffocation action of covering the combustion surface with a foam extinguishing agent and the cooling action by the moisture of the foam extinguishing agent, especially oil fires and chemical fires, etc. Excellent fire extinguishing performance for cases where it is difficult to extinguish with water.

  On the other hand, the foam fire extinguishing equipment generally includes a water source such as a water storage tank, a pressure feed pump (pressurized water feeding device) for pumping water from the water source through the main pipe, a foam fire extinguishing chemical storage tank for storing the foam fire extinguishing stock solution, The main pipe connected to the pressure pump is used to mix water from the water source with foam extinguishing agent at a certain ratio, and the foam extinguishing agent generated by the mixer is released at the front end of the main pipe. And a foam head (foam nozzle).

  In addition, the main pipe is provided with a simultaneous open valve between the mixer and the foam head, and a detection pipe is branched and connected to the simultaneous open valve. A fire that senses a fire and opens it to release water. A sensing head (closed sprinkler head) is provided in a branch connection. When the fire detection head is opened in the event of a fire, the inside of the detection pipe is depressurized, and a simultaneous opening valve connected to the fire detection head is automatically opened through this detection pipe, and the foam extinguishing agent is released from the foam head.

  In addition, a manual start valve is provided at the front end of the sensing pipe. By manually opening the manual start valve, the pressure in the sensing pipe is reduced and the simultaneous open valve is automatically opened to extinguish the foam. The agent can be released from the foam head. That is, it is configured such that a person who finds a fire can perform foam extinguishing by manually operating a manual start valve.

JP2012-095897A JP 2014-050546 A

  On the other hand, if a manual start valve is provided and the foam extinguisher can be released by manual operation, the foam extinguisher will be released if the manual start valve is accidentally opened or mischievous. .

  And if foam extinguishing agent is released by such mischief, in order to remove and extinguish the foam extinguishing agent, it is necessary to remove the foam extinguishing agent while diluting it. Cost.

 In particular, if harmful PFOS (perfluorooctane sulfonic acid) or the like is contained in the foam extinguisher, further careful removal work is required to remove this harmful substance, which requires enormous labor and cost. Become.

  For this reason, a technique for preventing the foam extinguishing agent from being erroneously released due to mischief or the like is strongly desired.

  In view of the above circumstances, an object of the present invention is to provide a foam extinguishing facility that can prevent the release of a foam extinguishing agent when a manual start valve is operated by mischief or the like.

  In order to achieve the above object, the present invention provides the following means.

  The foam extinguishing equipment of the present invention is a main pipe for pumping foam extinguishing agent and releasing it from a foam head provided on the tip side, a simultaneous opening valve for opening and closing the main pipe, and a branch connection to the simultaneous opening valve A sensing pipe, a fire sensing head attached to the sensing pipe, opened to open in the event of a fire to depressurize the sensing pipe, and the simultaneous opening valve is opened by the decompression, and the fire of the sensing pipe A fire extinguishing agent erroneous release prevention system for preventing the release of foam fire extinguishing agent by erroneous operation of the manual activation valve, and having a manual activation valve attached to the front end side of the sensing head and opening and closing the sensing pipe by manual operation The fire extinguishing agent erroneous release prevention system includes a limit switch for detecting an open / closed state of the manual start valve, and between the manual start valve of the sensing pipe and the fire detection head. An open / close valve provided, a control device that receives a manual start valve open signal from the limit switch and controls the open / close valve to open, and a predetermined time after the limit switch detects an open operation of the manual start valve. And an interval time setting unit that sends a manual activation valve opening signal to the control device at intervals.

  The foam extinguishing equipment of the present invention is a main pipe for pumping foam extinguishing agent and releasing it from a foam head provided on the tip side, a simultaneous opening valve for opening and closing the main pipe, and a branch connection to the simultaneous opening valve A sensing pipe, a fire sensing head attached to the sensing pipe, opened to open in the event of a fire to depressurize the sensing pipe, and the simultaneous opening valve is opened by the decompression, and the fire of the sensing pipe A fire extinguishing agent erroneous release prevention system for preventing the release of foam fire extinguishing agent by erroneous operation of the manual activation valve, and having a manual activation valve attached to the front end side of the sensing head and opening and closing the sensing pipe by manual operation The fire extinguishing agent erroneous release prevention system includes a limit switch for detecting an open / closed state of the manual start valve, and between the manual start valve of the sensing pipe and the fire detection head. An opening and closing valve provided, receives a fire signal from the fire detector, and characterized in that it comprises a control device for opening-control the opening and closing valve with receiving a manual activation valve opening signal from the limit switch.

  Further, in the foam fire-extinguishing equipment of the present invention, the fire extinguishing agent erroneous release prevention system may provide a manual activation valve opening signal at an interval of a predetermined time after the limit switch detects the opening operation of the manual activation valve. It is desirable to provide an interval time setting unit for sending to the control device.

  Furthermore, in the foam fire extinguishing equipment of the present invention, it is more preferable that the fire extinguishing agent erroneous release prevention system includes a count display unit that counts down and displays the time of the interval.

  Moreover, in the foam fire-extinguishing equipment of the present invention, it is further preferable that the fire-extinguishing agent erroneous release prevention system further includes an alarm notification unit that issues an alarm while the limit switch detects the opening operation of the manual activation valve.

  The foam fire extinguishing system of the present invention is equipped with a fire extinguishing agent release prevention system, and is configured to open the on-off valve provided in the sensing pipe by detecting the opening operation of the manual start valve with a limit switch. It is possible to prevent the foam from being discharged when the valve is opened.

It is a figure which shows the foam fire extinguishing equipment which concerns on one Embodiment of this invention.

  Hereinafter, with reference to FIG. 1, the foam fire-extinguishing equipment which concerns on one Embodiment of this invention is demonstrated.

  The foam fire extinguishing equipment A according to the present embodiment is provided in a building / facility such as an underground parking lot, a factory, or a building, for example, and as in the conventional foam fire extinguishing equipment, as shown in FIG. In the main pipe 2, a pressure-feed pump (pressurized water supply device) 4 for pumping water 3 from the water source 1 through the main pipe 2, a foam-extinguishing agent storage tank 6 for storing a foam-extinguishing agent (foam-extinguishing stock solution) 5, and A mixer 7 for mixing the water 3 sent from the water source 1 and the foam extinguishing agent 5 sent from the foam extinguishing agent storage tank 6 at a constant ratio, and provided at the front end side of the main pipe 2 for mixing. And a foam head (foam nozzle) 8 for discharging the foam extinguisher generated in the vessel 7.

  The pressure pump 4 is driven and controlled by receiving an operation command from the control room 9 (pump control room, monitoring room, etc.), and the pressure switch 11 is driven to supply compressed air from the pressure tank 12 to the foam fire extinguishing agent storage tank. 6 and a predetermined amount of water 3 and foam extinguishing agent 5 are sent to the mixer 7.

  Furthermore, the main pipe 2 is provided with a control valve 13 and a simultaneous release valve (decompression release valve) 14 in that order from the mixer 7 between the mixer 7 and the foam head 8. The control valve 13 closes the main pipe 2 at the normal time, the pressure switch 15 is driven by an operation command of the control chamber 9, and opens when the pressure switch 15 is driven to open the main pipe 2.

  A sensing pipe 16 is connected to the simultaneous opening valve 14, and a fire sensing head (closed sprinkler head) 17 for detecting a fire and releasing water by opening the sensing pipe 16 is provided in a branched manner. The simultaneous opening valve 14 is opened when the fire detection head 17 is opened in the event of a fire and the inside of the detection pipe 16 is depressurized and is automatically opened to release the foam extinguishing agent from the foam head 8.

  Further, a manual activation valve 20 is provided at the distal end side of the sensing pipe 16, and by opening the manual activation valve 20 manually, the simultaneous release valve 14 is opened by decompression and the foam extinguishing agent is released from the foam head 8. Can be made. That is, it is configured such that a person who discovers a fire can perform foam extinguishing by manually operating the manual start valve 20.

  On the other hand, the foam fire extinguishing equipment A of this embodiment includes a fire extinguishing agent erroneous release prevention system B for preventing the foam fire extinguishing agent from being released when the manual activation valve 20 is opened due to mischief or the like.

  The fire extinguishing agent erroneous release prevention system B includes a limit switch 21 that detects the open / close state of the manual start valve 20, and an open / close valve (electromagnetic valve) 22 provided between the manual start valve 20 of the sensing pipe 16 and the fire detection head 17. And a receiver (control device) 19 that receives a fire detection signal from the fire detector 10 and receives a manual activation valve opening signal from the limit switch 21 and controls the opening and closing of the on-off valve 22 through the relay 23. ing.

  The on-off valve 22 is not the primary side of the manual start valve 20 (between the manual start valve 20 of the sensing pipe 16 and the fire detection head 17), but the secondary side of the manual start valve 20 (the front end side of the sensing pipe 16). You may make it provide in. When the on-off valve 22 is provided on the secondary side, it can be easily added to the existing equipment to have the configuration of this embodiment.

  The receiver 19 is preferably a battery built-in type. Further, the relay device 23 is not necessarily provided, and the receiver 19 may directly control the opening / closing of the on-off valve 22 by receiving a fire detection signal and a manual activation valve opening signal.

  In the fire extinguishing agent release prevention system B of this embodiment, when the manual activation valve 20 is opened, the limit switch 21 detects this, and a manual activation valve opening signal is sent to the receiver 19.

  The receiver 19 receives the manual activation valve opening signal, receives the fire detection signal from the fire detector 10, and controls opening / closing of the on-off valve 22 through the relay device 23 when detecting that a fire has occurred. Thus, when the manual start valve 20 is opened, when the fire detector 10 detects a fire, the on-off valve 22 is opened, the sensing pipe 16 is depressurized, the simultaneous open valve 14 is opened, and the foam extinguisher is put on the foam head. 8 is released.

  That is, in the fire extinguishing agent release prevention system B of the present embodiment, even if the manual activation valve 20 is opened, the open / close valve 22 does not open when the fire detector 10 does not detect a fire. For this reason, even if the manual start valve 20 is accidentally opened due to mischief or the like, the fire detector 10 does not detect fire, so the on-off valve 22 and thus the simultaneous open valve 14 do not open, and the foam extinguisher is not used. It will not be released.

  When this fire extinguishing agent release prevention system B is provided, a manual activation valve opening signal (and a manual activation valve closing signal) from the manual activation valve 20 is sent to the receiver 19. Can be stored, and the opening / closing operation of the manual start valve 20 and the release of the foam extinguishing agent can be left as a history.

  Further, it is indicated that the manual start valve 20 has been opened by the receiver 19 (or opened / closed), or the log is output by a printer, so that the manual start valve 20 can be opened or closed and the foam extinguishing agent is released. It is also possible to display and output the history and status.

  Further, when manually releasing the foam extinguishing agent, a manual activation valve opening signal (and a manual activation valve closing signal) from the manual activation valve 20 is sent to the receiver 19, and the receiver 19 opens the on-off valve 22. Open control. For this reason, it is possible to determine whether the foam extinguishing agent is automatically released (by activation of the fire detection head 17) or manually (by operation of the manual activation valve 20).

  In addition, when a manual activation valve opening signal is sent from the limit switch 21 to the receiver 19, an interval time setting unit that sends a signal after an interval of a predetermined time may be provided.

  Further, a count display unit 24 that counts down and displays the interval time may be provided.

  In addition, the limit switch 21 detects the opening operation of the manual start valve 20, and is provided with an alarm issuing unit 25 for acoustically outputting a fire alarm and a failure alarm, and an alarm issuing unit 26 for emitting a fire alarm and a failure alarm by light. You may do it.

  In addition, by providing the interval time setting unit, the count display unit 24, and the alarm notification units 25 and 26 in this way, it is possible to notify that the manual start valve 20 has been opened, and it has been opened by mischief or the like. It is possible to urge the person to return the manual activation valve 20 to the original state, or to give time to return the manual activation valve 20 to the original state.

  Therefore, in the foam fire extinguishing equipment A of the present embodiment, the fire extinguishing agent release prevention system B is provided, the opening operation of the manual activation valve 20 is detected by the limit switch 21, and the interval time setting unit or the count display unit 24, Since the alarm notification unit 25 is selectively provided as appropriate, and the on / off valve 22 provided on the sensing pipe 16 is opened when the fire detector 10 detects a fire, the manual start valve 20 is opened by mischief or the like. It is possible to prevent the foam from being discharged when it is discharged.

  As mentioned above, although one Embodiment of the foam fire-extinguishing equipment concerning this invention was described, this invention is not limited to said one Embodiment, In the range which does not deviate from the meaning, it can change suitably.

1 Water source 2 Main pipe 3 Water 4 Pressure pump (Pressurized water supply device)
5 Foam extinguishing agent (foam extinguishing concentrate)
6 Foam extinguishing agent storage tank 7 Mixer 8 Foam head (foam nozzle)
9 Control room 10 Fire detector 11 Pressure switch 12 Pressure tank 13 Control valve 14 Simultaneous release valve (pressure reduction release valve)
15 Pressure switch 16 Sensing piping 17 Fire sensing head (closed sprinkler head)
19 Receiver (control device)
20 Manual start valve 21 Limit switch 22 Open / close valve (solenoid valve)
23 repeater 24 count display unit 25 alarm reporting unit 26 alarm reporting unit A foam fire extinguishing equipment B fire extinguishing agent erroneous release prevention system

Claims (5)

A main pipe for pumping foam extinguisher and releasing it from the foam head provided on the tip side;
A simultaneous opening valve for opening and closing the main pipe;
A sensing pipe branched and connected to the simultaneous release valve;
A fire sensing head attached to the sensing pipe, driven to open in the event of a fire to depressurize the sensing pipe, and to open the simultaneous open valve by the decompression;
A manual start valve attached to the tip side of the sensing pipe from the fire sensing head and manually opening and closing the sensing pipe;
A fire-extinguishing agent erroneous release prevention system for preventing the foam extinguishing agent from being released by erroneous operation of the manual start valve;
The fire extinguishing agent erroneous release prevention system includes a limit switch for detecting an open / close state of the manual start valve, an open / close valve provided between the manual start valve of the sensing pipe and the fire detection head, and the limit switch. A control device that receives a manual start valve open signal and controls the opening and closing of the open / close valve; and a manual start valve open signal at an interval of a predetermined time after the limit switch detects an open operation of the manual start valve. A foam fire extinguishing system comprising an interval time setting unit to be sent to a control device. A main pipe for pumping foam extinguisher and releasing it from the foam head provided on the tip side;
A simultaneous opening valve for opening and closing the main pipe;
A sensing pipe branched and connected to the simultaneous release valve;
A fire sensing head attached to the sensing pipe, driven to open in the event of a fire to depressurize the sensing pipe, and to open the simultaneous open valve by the decompression;
A manual start valve attached to the tip side of the sensing pipe from the fire sensing head and manually opening and closing the sensing pipe;
A fire-extinguishing agent erroneous release prevention system for preventing the foam extinguishing agent from being released by erroneous operation of the manual start valve;
The fire extinguishing agent erroneous release prevention system includes a limit switch for detecting an open / close state of the manual start valve, an open / close valve provided between the manual start valve of the sensing pipe and the fire detection head, and a fire detector. A foam fire extinguishing system comprising: a control device that receives a fire detection signal and receives a manual activation valve opening signal from the limit switch and controls the opening and closing of the on-off valve. In the foam fire-extinguishing equipment according to claim 2,
The fire extinguishing agent erroneous release prevention system includes an interval time setting unit that sends a manual activation valve opening signal to the control device at a predetermined time interval after the limit switch detects the opening operation of the manual activation valve. Foam extinguishing equipment characterized by that. In the foam fire-extinguishing equipment according to any one of claims 1 to 3,
The fire extinguishing agent erroneous release prevention system includes a count display unit that counts down and displays the interval time. In the foam fire-extinguishing equipment according to any one of claims 1 to 4,
The fire extinguishing agent erroneous discharge prevention system includes a foam fire extinguishing system, wherein the limit switch detects an opening operation of the manual activation valve and issues an alarm.

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