JP2007068639A - Gas fire extinguishing facilities - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent the misdischarge of both a fire extinguishing agent and a propellant gas when inspecting gas fire extinguishing facilities. <P>SOLUTION: The gas fire extinguishing facilities executing fire extinguish discharging carbon dioxide gas into a protection partition 6 is equipped with an inspection switch 60 arranged in a control board 16 and executing switching from an observing mode to a fire extinguishing mode, a releasing machine trip detection switch 62 detecting the trip of a releasing machine 26 for a propellant gas container 11, and a control means 63 generating and outputting a releasing machine operating signal by the and output of an activating signal from fire detectors 21, 22 or an operating box 18 and the releasing machine trip signal from the releasing machine trip detection switch 62 when switching to the inspecting mode by the inspection switch 60. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for preventing erroneous emission at the time of inspection (maintenance) in a gas fire extinguishing facility that discharges carbon dioxide gas into a protective compartment to extinguish the fire.

  An example of a gas fire extinguishing facility using carbon dioxide gas as a fire extinguisher is shown in FIG. In FIG. 3, 1 is a fire extinguisher storage container, and the fire extinguishing agent (carbon dioxide gas) filled in the fire extinguisher storage container 1 is connected to a collecting pipe 4 from a container valve 2 (with an opener) through a conduit 3. To the jet heads 7 disposed in the respective protection sections 6 through the branch pipes 5 and the branch pipes 5. A safety device 8 is provided in the middle of the collecting pipe 4, a closing valve 9 is provided on the secondary side of the safety device 8, and each branch pipe 5 is selected from the collecting pipe 4 on the secondary side of the closing valve 9. Branch through 10. Reference numeral 11 denotes an activation gas container. The activation gas filled in the activation gas container 11 is transferred from the container valve 12 (with an opener) to the activation gas inlet of the selection valve 10 via the conduit 13. It is guided from the exhaust port of the selection valve 10 to the starter gas introduction port of the opener that is detachably attached to the container valve 2 of the extinguishing agent storage container 1 through the conduit 14 and the check valve 15. 16 is a control panel disposed in the monitoring room 17, 18 is an operation box (manual activation device) disposed near the entrance / exit 19 of the protection section 6, and 21 and 22 are disposed in each protection section 6. Different types of fire detectors, 23 is a fullness indicator lamp disposed near the entrance / exit 19 of the protection section 6, 24 is a speaker (voice alarm device) disposed in each protection section 6, and 25 is each protection section 6 26 is an opener detachably attached to the container valve 12 of each starting gas container 11, and 27 is provided in the middle of the branch pipe 5 on the secondary side of each selection valve 10. A pressure switch 30 is connected to each protection section 6 and a ventilation duct having a damper 31 at a ventilation port, and 32 is a piston releaser that guides carbon dioxide gas from a branch pipe 5 in each protection section 6 through a conduit 33.

  Next, an outline of the control circuit 20 of the control panel 16 is shown in FIG. In FIG. 4, the control circuit 20 is constituted by a microcomputer. The control circuit 20 includes a fire light, a discharge light, an automatic light, a manual light, a power light, an operation box door open, a start light, a failure light, a switch caution light, a shut-off valve open, In-panel operation light 41 such as shut-off valve closing light, self-manual changeover switch, alarm stop switch, buzzer stop switch, system recovery switch, equipment stop transfer stop switch, etc., and release delay time are set. The discharge delay time setter 42 and its set value are displayed and a seven segment type countdown display 43 for displaying the set discharge delay time, a buzzer 46, a telephone jack (not shown), and an operation box 16 are provided. Operation box indicator light 48, such as fire light, emission light, start-up light, automatic light, manual light, power supply light, inspection warning light, shut-off valve closing light, etc., countdown table for set release delay time 7 segment type countdown display 49, operation switch 50 such as self / manual changeover switch, door open switch, start switch, emergency stop switch, telephone jack (not shown), and each fire detector 21, 22, fullness indicator lamp 23, speaker 24, shutter motor 51, solenoid of opener 26, pressure switch 27, open (detection) switch 52 and close (detection) switch 53 of shut-off valve 9, and power supply circuit with power storage equipment 54, a ground fault detection circuit, a circuit abnormality detection circuit (not shown), an external device to be protected, a ventilation fan (not shown), and the like are connected.

  The gas fire extinguishing equipment is based on automatic start-up in principle for the purpose of initial fire extinguishing, and the operation flow of automatic start-up is shown in FIG. In the case of automatic startup (automatic monitoring mode in which both the control panel 16 and the operation switch 18 are automatically switched to the automatic side, and the control circuit 20 automatically displays by turning on the automatic lamp) When a fire occurs in the section 6, the control circuit 20 displays an external device stop report based on the operation of one type of fire detector 21 (fire detection), and displays a fire display by flashing a fire light. Based on the operation of the types of fire detectors 22, that is, by the AND operation of the two types of fire detectors 21, 22, a fire display by turning on the fire lights and a voice evacuation alarm by the speaker 24 are performed. Next, the control circuit 20 displays the fire extinguishing equipment start by lighting the start lamp, the start alarm by voice by the speaker 24, the start of the release delay timer, the shutter 25 closing by operating the shutter motor 51 and the ventilation fan being stopped, the outside Stop the equipment. Next, when there is no artificial emergency stop switch operation within the discharge delay time, the control circuit 20 activates the opener 26 (the solenoid) of the container valve 12 of the activation gas container 11 after the discharge delay time has elapsed. The activation gas is released by the operation of the opener 26, the selection valve 10 is opened by the gas pressure, and the container valve 2 of the extinguishing agent storage container 1 is also opened through the opener. When the container valve 2 of the fire extinguisher storage container 1 is opened, the fire extinguisher is discharged from the ejection head 7 into the protective compartment 6, and the piston releaser 32 is activated by the gas pressure to close the damper 31 and the pressure switch 27. Is activated, and the control circuit 20 displays the fullness of the extinguishing agent by turning on the discharge lamp and blinking the fullness indicator lamp 23.

  On the other hand, in the case of manual activation (manual mode state where both the control panel 16 and the operation switch 18 are manually switched to the manual side, and the control circuit 20 performs manual display by turning on the manual light) When the door of the box 18 is artificially opened and this is detected by the control circuit 20 by the ON signal of the door opening switch, the control circuit 20 displays the operation box open by the lighting of the operation box door open light, and the external device stop transfer. In addition to displaying, a fire display by turning on a fire lamp and an evacuation alarm by voice by the speaker 24 are performed. Next, after confirming the evacuation of a person in the protective section 6, when the start switch is turned on artificially, the control circuit 20 displays a start display by lighting the start lamp, a start alarm by sound from the speaker 24, and a release delay timer. Starting, closing the shutter 25 by operating the shutter motor 51, stopping the ventilation fan, stopping the external device, and the like. Next, when the artificial emergency stop switch is not turned on within the discharge delay time, the control circuit 20 operates the opener 26 of the container valve 12 of the activation gas container 11 after the discharge delay time has elapsed. Subsequent operations are the same as in the case of automatic startup.

  As described above, the gas fire extinguishing equipment releases the fire extinguishing agent into the protective compartment 6 by the automatic start function based on the operation of the fire detectors 21 and 22 or the manual start function based on the switch operation from the operation box 18. Fire extinguishers, and to maintain such functions properly, regular inspections and reports are required by the Fire Service Act.

And the inspection work of the gas fire extinguishing equipment is to close the shut valve 9 before the implementation, then remove the opener for the extinguishing agent storage container or the starting gas container, and perform the operation test etc. in this state. It has become.
JP 2005-58460 A

  The problem to be solved by the present invention is that in the conventional gas fire extinguishing equipment, even if the shut-off valve 9 is closed, the fire extinguishing is performed when the starter is mistakenly started while the opener is being removed or without being removed. The fire extinguishing agent released from the fire extinguisher storage container is stopped by the shutoff valve, which poses no danger to the inspector in the protective compartment, but is released into the piping from the fire extinguishing agent storage container to the shutoff valve, It is in the point that wasteful restoration work which requires a lot of labor and cost is required, including the replacement of the agent storage container and the starting gas container and the treatment of the extinguishing agent and the starting gas discharged into the piping.

  In order to solve the above-described problems, a gas fire extinguishing apparatus according to the first aspect of the present invention includes an inspection switch that is disposed in a control panel and switches from a monitoring mode to an inspection mode, and a starting gas. Opener removal detection means for detecting the removal of the container opener, and when switching to the inspection mode by the inspection switch, the start signal from the fire detector or operation box and the opener removal from the opener removal detection means And a control means for generating and outputting an opener operation signal by AND output with the signal.

  The gas fire extinguishing equipment according to the invention described in claim 2 is the same as that of the invention described in claim 1 except that the in-inspection notification means that operates when the inspection switch is switched to the inspection mode is provided between the control panel and the protective section. This is in addition to that provided near the doorway.

A gas fire extinguishing system according to a third aspect of the present invention is the gas fire extinguishing system according to the second aspect of the present invention, wherein the informing means on the control panel side is a buzzer and the informing means on the protective compartment side is a full indicator light. Is added.

  According to the first aspect of the present invention, it is possible to reliably prevent the accidental discharge of both the fire extinguishing agent and the starting gas when checking the gas fire extinguishing equipment, and therefore it is possible to eliminate useless recovery work associated with the erroneous discharge. At the same time, inspection of gas fire extinguishing equipment can be performed safely.

  According to the second aspect of the present invention, it is possible to notify each inspector on the control panel side and the protection section side that the inspection is being performed, and the notification form is removed by removing the opener for the starting gas container. By making it different from before and after, it is possible to inform each inspector of the progress of the accidental discharge prevention work, and it is possible to take more reliable countermeasures against accidental discharge.

  According to the third aspect of the invention, the existing buzzer and the fullness indicator lamp can be effectively used to inform the respective checkers on the control panel side and the protective compartment side of the progress of the inspection and the accidental discharge prevention work. As a result, the increase in cost can be suppressed.

  Hereinafter, embodiments of the gas fire extinguishing equipment of the present invention will be described with reference to the drawings. In addition, since the gas fire extinguishing equipment which concerns on embodiment of this invention has the fundamentally same structure as the gas fire extinguishing equipment shown in FIGS. 3-5, and starts by the same method, a different point is demonstrated.

  FIG. 1 is a block diagram of a portion of the present invention in the control circuit 20 of the control panel 16. In FIG. 1, reference numeral 60 denotes an inspection switch that is disposed on the control panel 16 as one of the in-panel operation switches 41 connected to the control circuit 20 and switches from the monitoring mode to the inspection mode. The start signal output line 61 for outputting the start signal (fire signal) from 21 and 22 and the start signal from the start switch of the operation box 18 to the control circuit 20 is divided into two systems by the inspection switch 60, and one of them is a monitoring mode. Output line 61a for the hour, and the other output line 61b for the inspection mode. When the inspection switch 60 is operated to the monitoring mode side, activation signals from the activation switches of the fire detectors 21 and 22 and the operation box 18 are output via the inspection switch 60 to the output line 61a in the monitoring mode. Is input to the control circuit 20, and the control circuit 20 outputs an operation signal of the opener 26 for the starter gas container 11 based on the input start signal, and automatically or manually starts the gas fire extinguishing equipment.

  Further, 62 is an opener removal detection switch as an opener removal detecting means for detecting removal of the opener 26 for the starter gas container 11, and 63 is a starter gas container at the time of inspection which the control circuit 20 has. 11 is an AND circuit for generating an operation signal of the opener 26. The output line 61b in the inspection mode is connected to one input of the AND circuit 63, and the opener removal detection switch 62 is connected to the other input. Is connected. When the inspection switch 60 is operated to the inspection mode side, the control circuit 20 is connected from the output line 61b in the inspection mode via the inspection switch 60 from the start switch of each of the fire detectors 21 and 22 and the operation box 18. When an activation signal is input to one of the AND circuits 63 and an opener removal signal is input from the opener removal detection switch 62 to the other of the AND circuits 63 of the control circuit 20, the AND circuit 63 In response to the AND output, the control circuit 20 generates and outputs an opener operation signal to automatically or manually start the gas fire extinguishing equipment.

  In the above configuration, before carrying out the inspection work of the gas fire extinguishing equipment, the inspection valve 60 is operated to switch the control circuit 20 from the monitoring mode to the inspection mode and perform an operation test or the like to close the closing valve 9. After that, while the opener 26 for the start-up gas container 11 is removed, the start-up gas containers 11 are erroneously output by the start-up signals from the start-up switches of the fire detectors 21, 22 and the operation box 18. Even if the start signal from the start switch of each of the fire detectors 21 and 22 and the operation box 18 is erroneously output without being removed without removing the opener 26, the opener 26 for the starter gas container 11 is removed. Since the opener removal signal is not output from the opener removal detection switch 62, the opener operation signal is not output from the control circuit 20. This reliably prevents accidental discharge of fire extinguishing agent and starting gas during inspection of gas fire extinguishing equipment.

  In FIG. 1, reference numeral 64 denotes an inspection lamp disposed on each of the control panel 16 and the operation box 16 as one of the display lamps of the in-panel indicator lamp 40 and the operation box indicator lamp 23 connected to the control circuit 20. When the inspection switch 60 is operated to switch the control circuit 20 from the monitoring mode to the inspection mode, the control circuit 64 turns on the inspection lamp 64 and sounds the buzzer 46 disposed on the control panel 16. To inform the inspector on the control panel 16 side in the monitoring room 17 that the inspection is being performed, and at the same time, the inspector on the protective compartment 6 side is also inspecting by turning on the fullness indicator lamp 23. It is configured to notify.

  Here, the buzzer 46 and the fullness indicator lamp 23 used as in-inspection notification means at the time of inspection notify that the inspection is being performed with a ringing and lighting form clearly different from the ringing and lighting at the start from the monitoring mode. For example, in the case of the buzzer 46 that continuously sounds at the start from the monitoring mode, the charging indicator lamp 23 is intermittently sounded at a predetermined time period at the time of inspection and flashes at the predetermined time period at the start from the monitoring mode. In the inspection, the existing buzzer 46 and the fullness indicator lamp 23 are appropriately used as the in-inspection notification means at the time of inspection by blinking at a predetermined time period significantly different from that at the start from the monitoring mode.

  In addition, a check-in-progress notification form in the check lamp 64 and the buzzer 46 and the fullness indicator lamp 23 as a check-in-progress notification means is used by using an opener removal signal input to the control circuit 20 from the opener removal detection switch 62. By making the difference between before and after removing the opener 26 for the starting gas container 11, the inspector is informed of the progress of the accidental discharge prevention work. For example, when the inspection switch 60 is operated to switch the control circuit 20 from the monitoring mode to the inspection mode (before the opener is removed), the inspection lamp 64 blinks at a predetermined time period and the buzzer 46 is When the opener removal signal is input to the control circuit 20 from the opener removal detection switch 62 (after the opener is removed), the full indicator lamp 23 blinks at the predetermined time cycle. ), The check lamp 64 is continuously turned on, the buzzer 46 is stopped from ringing, and the fullness indicator lamp 23 is continuously turned on to inform each inspector of the progress of the accidental discharge prevention work. It is composed.

  FIG. 2 shows a specific example of the opener removal detecting means. As shown by the solid line in FIG. 2, a switch mounting bracket is provided on the protruding side surface of the container valve connection port 26b of the outer box 26a in the opener 26 for the starting gas container 11. An opener removal detection switch 62, which is an on / off switch, is attached via 65. Further, a switch operating fitting 66 is attached in the vicinity of the opener connection port 12a in the container valve 12 of the starting gas container 11. When the opener 26 is attached to the container valve 12 in a state where the opener connection port 12a of the container valve 12 and the container valve connection port 26a of the opener 26 are connected, the opener removal detection switch 62 on the opener 26 side. The switch arm 62b is brought into contact with the switch operating fitting 66 on the container valve 12 side and pressed from the on position to the off position, and the opener removal detection switch 62 is held in the off state, while the opener connection port 12a and the container When the opener 26 is removed from the container valve 12 by disconnecting the valve connection port 26a, the switch arm 62b of the opener removal detection switch 62 is returned from the off position to the on position, and the opener removal detection switch 62 is turned on. By operating, it is configured to detect the removal of the opener 2 for the starting gas container 11. The opener removal detection switch 62 may be attached to the container valve 12 side, and the switch operation fitting 66 may be attached to the opener 26. In addition, the detection of the removal of the opener 26 is performed by the ON operation of the opener removal detection switch 62, but it goes without saying that it can also be performed by the OFF operation.

  In addition, after the opener 26 for the starting gas container 11 is removed from the container valve 12, the lower surface of the outer box 26a at the time of attachment is joined to a flat mounting surface such as a floor surface. It is supposed to be placed on the surface in an installed position. For this reason, as shown by the phantom line in FIG. 2, the opener removal detection switch 62 is housed in the inner lower part of the outer box 26 a, and the tip of the switch arm 62 b protrudes from the lower surface of the outer box 26 a, After the opener 26 is removed from the container valve 12, when the opener 26 is placed on a flat mounting surface such as a floor surface, the opener removal detection switch 62 is turned on from the off state, and the starter gas container 11 is turned on. The removal of the opener 2 may be detected.

  As described above, the gas fire extinguishing equipment according to the embodiment of the present invention includes the inspection switch 60 that is arranged on the control panel 16 and switches from the monitoring mode to the inspection mode, and the opening for the starting gas container 11. From the opener removal detection means 62 for detecting the removal of the heater 26 and from the start signal from the fire detectors 21 and 22 or the operation box 18 and the opener removal detection means 62 when the inspection switch 60 switches to the inspection mode. Control means 63 for generating and outputting an opener operation signal by AND output with the opener removal signal of the opener, thereby preventing erroneous discharge of both the fire extinguishing agent and the starting gas when inspecting the gas fire extinguishing equipment. Since it can be surely prevented, it is possible to eliminate useless restoration work due to erroneous release and to safely inspect the gas fire extinguishing equipment.

  In addition, by providing inspection in-progress means 64, 46, 23 that are activated when the inspection switch 60 is switched to the inspection mode near the control panel 16 and the entrance / exit of the protection section 6, the control panel 16 side and the protection section are provided. Each inspector on the 6 side can be informed that the inspection is in progress, and the notification form is made different before and after the opener 26 for the starting gas container 11 is removed. It is also possible to inform each inspector of the progress, and to take more reliable measures to prevent erroneous releases.

  Further, the in-inspection notification means on the control panel 16 side is the buzzer 46, and the in-inspection notification means on the protection section 6 side is the fullness indicator lamp 23, and the existing buzzer 46 and the fullness indicator lamp 23 are used effectively. Since it is possible to notify the inspectors on the 16 side and the protection section 6 side of the progress of the inspection and the erroneous emission prevention work, it is possible to suppress an increase in cost.

  As mentioned above, although this Embodiment showed an example of the suitable embodiment of this invention, this invention is not limited to it, Various modifications can be implemented within the range which does not deviate from the summary. For example, the present invention provides an extinguishing agent for an inert gas composed of an inert gas or a mixture of nitrogen and argon other than carbon dioxide gas, or a fluorine gas which is a compound of halogen elements (bromine, fluorine, etc.), carbon, and hydrogen. In addition to the gas-based fire extinguishing equipment used as the above, the present invention can be suitably applied to a powder fire extinguishing equipment.

It is a block diagram of the present invention portion in the control circuit of the control panel of the gas fire extinguishing equipment. It is a side view of the opener for the gas container for starting which shows the specific example of an opener removal detection means. It is a block diagram which shows an example of a gas fire extinguishing equipment. It is a block diagram which shows the outline of the control panel of a gas fire extinguishing equipment. It is a flowchart explaining the operation | movement outline | summary of a gas fire extinguishing equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire extinguisher storage container 6 Protective area 16 Control panel 11 Gas container for starting 18 Operation box 20 Control circuit 21, 22 Fire detector 23 Full indicator (notification means during inspection)
26 Opening device for starting gas container 46 Buzzer (notification means during inspection)
60 Inspection switch 62 Opener removal detection switch (Opener removal detection means)
63 AND circuit (control means)
64 Inspection light (notification means during inspection)

Claims (3)

  In a gas fire extinguishing system that discharges carbon dioxide gas into the protective compartment and extinguishes fire, an inspection switch that is placed on the control panel to switch from the monitoring mode to the inspection mode, and an opener for the starting gas container An opener removal detection means for detecting removal, and an AND output of a start signal from the fire detector or operation box and an opener removal signal from the opener removal detection means when the inspection switch is switched to the inspection mode. And a control means for generating and outputting an opener operation signal.   The gas fire extinguishing equipment according to claim 1, wherein an in-inspection notification means that operates when the inspection mode is switched by an inspection switch is provided in the vicinity of an entrance / exit of the control panel and the protection section.   The gas fire extinguishing equipment according to claim 2, wherein the in-inspection notification means on the control panel side is a buzzer, and the in-inspection notification means on the protection section side is a full indicator lamp.

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