JP3172853B2 - Safety device for carbon dioxide fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for extinguishing a fire by activating a carbon dioxide fire extinguishing system when a fire occurs in a protective zone and releasing a carbon dioxide fire extinguishing agent into the protective zone. More specifically, it relates to a safety device for carbon dioxide fire extinguishing equipment that restricts starting due to erroneous operation when the equipment is started by manual operation of a start operation button in an operation box installed in or near a protective compartment. It is.

[0002]

2. Description of the Related Art In general, in this type of carbon dioxide fire extinguishing equipment, if it is unnecessarily operated due to an erroneous operation such as an operation error, it often leads to a personal injury. For example, when a person is present in the protective compartment, the carbon dioxide fire extinguishing system is activated due to an erroneous operation, and a carbon dioxide fire extinguishing agent is released, and when the carbon dioxide extinguishing agent is filled in the protective compartment, a fatal accident due to suffocation may occur. Therefore, it is necessary to strictly consider the safety measures of carbon dioxide fire extinguishing equipment.

In general, fire extinguishing agents are released due to non-fire in a carbon dioxide fire extinguishing system as follows: (a) Generation of a pseudo start signal due to disconnection or short circuit of external electric wiring connecting between a control unit and an operation box. (B) Incorrect operation in the operation box. In order to prevent accidents caused by the release of fire extinguishing agents due to these non-fires, measures that have been enacted and that have been actually implemented in the past include (1) ground faults for wiring Detecting a short circuit and determining whether the signal is a false start signal or a true signal, and if it is determined that the signal is a false signal, a signal not to enter the startup stage. There is a fire extinguishing system in which a shutoff valve is provided between a carbon dioxide container and a fire extinguisher pipe arranged corresponding to each protective section and a selection valve interposed therebetween.

FIG. 4 is a system diagram of a carbon dioxide fire extinguishing system, in which a plurality of protective compartments A and B are provided with extinguishing agent jet heads 30A and 30B and a fire detector 31 respectively.
A, 31B are provided, and each protective section A, 31B is provided.
Outside the vicinity of B, a start operation button (not shown) for giving a start command to the electric start device 32 inside thereof
Operation boxes 33A and 33B are provided with emergency stop operation buttons (not shown) for canceling the start command, and having opening and closing doors (not shown). Each of the fire extinguishing agent spray heads 30A, 30B is connected to a plurality of carbon dioxide containers 36 via fire extinguishing agent pipes 34A, 34B and a common pipe 35.
The fire extinguishing agent pipes 34A and 34B have selection valves 37A and 37B interposed therebetween, and a shutoff valve 38 is interposed near the outlet of the common pipe 35. Openers 39 are mounted on the carbon dioxide containers 36, respectively, and are set in advance according to the sizes (volumes) of the protection compartments A and B in response to a start signal from the start device 32. The opening operation of a certain number of openers 39 is performed.

On the other hand, a detection signal from the fire detectors 31A and 31B, a start command signal from a start operation button in the operation boxes 33A and 33B, and an emergency stop signal from an emergency stop operation button are received by the starter through a receiving unit 40. A control unit (control panel) 41 for transmitting data to 32 is provided. The control unit 41 includes a delay timer (not shown) that outputs a start command signal to the start device 32 after a predetermined time from the time when the start operation button is operated and outputs a start command signal to the start device 32. When the time is up, the corresponding opener 39 is opened to discharge the carbon dioxide fire extinguishing agent from the fire extinguishing agent ejection heads 30A and 30B of the protection section A or B. In addition, the selection valve 3
Pressure switches 42A and 42B are installed downstream of 7A and 37B. The pressure switches 42A and 42B detect the pressure due to the release of the fire extinguishing agent into the protection section A or B, and indicate the fullness provided near the protection sections A and B outside. The lamps 43A and 43B are turned on.

[0006] Keep carbon dioxide fire extinguishing equipment comprising a construction as described above, the fire operation flow for activating the equipment manually is shown in FIG. In the following description, a flow when a fire occurs in the protection section A will be described. However, the same applies to a case where a fire occurs in another protection section B. First, find and confirm the fire (step S
1) The person who opened the operation box 33A opens and closes the door (step S)
2) At the same time, an evacuation warning such as a voice warning is output (step S3). Next, after confirming the evacuation of the personnel in the protection section A, the activation operation button in the operation box 33A is pressed (step S4), and in conjunction with this operation, a device such as a ventilation fan in the protection section A is operated. The information for stopping or taking out and moving is output (step S5).

[0007] Simultaneously with the pressing operation of the start operation button, the delay timer in the control section 41 starts the time counting operation (step S6). If the fire is extinguished or extinguished until the delay timer times out (about 25 seconds), the emergency stop operation switch in the operation box 33A is pressed. It is determined whether or not the emergency stop operation switch has been pressed (step S7). If an operation has been performed, the process returns to step S1 and restores the information output for stopping or moving the device in the protection section A. (Step S8). If the delay timer times out without any operation (step S
9) The control unit 41 outputs a start command signal to the start device 32, the corresponding opener 39 is opened, and the corresponding selection valve 37A is opened (step S1).
0), the carbon dioxide fire extinguishing agent in the carbon dioxide container 36 is discharged from the head 30A into the protection compartment A via the pipes 35 and 34A (step S11).

At this time, the pressure switch 42A is operated (step S12), and upon receiving the pressure detection signal, the filling indicator 43A provided outside the vicinity of the protection section A is turned on to change the filling state of the fire extinguishing agent to the outside. (Step S1
3).

[0009]

By the way, the operation boxes 33A and 33B of the carbon dioxide fire extinguishing equipment can be easily approached and operated by an unspecified number of people in order to be able to respond promptly when a fire is found. It is usually installed at a location. Therefore, when there is no fire, the operation box may be operated by mistake with the operation box of other equipment, or it may be operated by mischief,
There is a problem that the fire extinguishing system is always activated by such an erroneous operation or a mischievous operation. That is, when the opening and closing doors of the operation boxes 33A and 33B are opened and the operation button for starting is pressed, the fire extinguishing agent is discharged into the protection compartment unless the operation button for emergency stop is pressed. In particular, in the case of an erroneous operation or a mischievous operation, an evacuation alarm is output when the opening / closing door is opened, so that the user is upset and it is practically difficult to press the emergency stop operation button. As a result, fire extinguisher is released even though it is not a fire.

As a countermeasure against such an erroneous operation or the like, the conventional means (1) does not make any use, and the shut-off valve in the means (2) is originally intended for a control unit or an operation box. It is provided to close the piping so that fire extinguishing agent is not released during functional tests such as, etc.It is always kept open and stops releasing fire extinguishing agent due to erroneous operation or mischief operation In order to perform this operation, it is necessary to move to the installation location and perform the closing operation, which is more difficult to operate than pressing the emergency stop operation button. Therefore, the conventional countermeasures (1) and (2) cannot be a solution to the erroneous operation or the mischief operation described above.

The present invention has been made in view of the above circumstances, and provides a safety device for a carbon dioxide fire extinguishing system capable of preventing unnecessary starting of a fire extinguishing system due to an erroneous operation or a mischievous operation and ensuring safety. It is intended to be.

[0012]

In order to achieve the above object, a safety device for a carbon dioxide fire extinguishing system according to the first aspect of the present invention is installed in or near a protective section, and a carbon dioxide fire extinguishing system is installed inside the protective zone. An operation box with an opening / closing door equipped with a start operation button for giving a start command to the starter of the equipment and an emergency stop operation button for releasing the start command, and timing from the time of operation on the start operation button A control unit including a delay timer for operating the carbon dioxide fire extinguishing device so as to transmit a start command signal to the activation device of the carbon dioxide fire extinguishing device after a predetermined time of operation and to discharge the fire extinguishing agent. The safety device for fire extinguishing equipment, wherein the control unit operates the start operation button until a predetermined time has elapsed since the opening and closing door of the operation box was opened. Extinguishing operation regulating means including a timer for regulating the transmission of the start command signal to the braking system in which is provided.

[0013] The safety device of the carbon dioxide fire extinguishing equipment having the above-mentioned structure may be provided with a notifying means for notifying an operation standby time for the start-up operation button when the opening / closing door of the operation box is opened. It is preferable to provide a notifying means for notifying the start-up completion state when the timer of the means has expired.

[0014]

According to the first aspect of the present invention, when it is not a fire,
Even if the operation box of other equipment is mistaken, or even if the opening / closing door of the operation box is opened by mischief and the start operation button inside the operation box is pressed, the operation of the fire extinguishing operation control means including the timer causes the operation to be restricted. A start command signal is not instantaneously transmitted to the start device, and the start operation is started by pressing the start operation button after a predetermined time required to confirm whether or not the personnel in the protective section have evacuated. The start command signal is transmitted to the start device. Therefore, unnecessary starting of the fire extinguishing equipment due to erroneous operation or mischievous operation can be prevented, and it is possible to avoid occurrence of a fatal accident due to accidental release of carbon dioxide in a state where there is a person in the protection compartment.

In particular, according to the first aspect of the present invention , the operation standby time for the activation operation button is notified to clearly inform the operator of the operation procedure in the event of a normal fire, and the predetermined fire extinguishing activation is ensured. I can do it. Further, in the invention of claim 1, a state in which the timer of the fire extinguishing operation restricting means has timed out, that is, a state in which the operation restriction has been released is notified, so that the pressing operation on the starting operation button or the release of the pressing operation is released. Is clearly notified to the operator, and it is possible to speed up the predetermined fire extinguishing start and the evacuation of the operator himself.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. In addition, the system diagram of the carbon dioxide fire extinguishing equipment in the present embodiment is as shown in FIG. 4 , and speakers 44A and 44B are added to this as an informing device by an informing unit to be described later.

FIG. 1 is a block diagram of the carbon dioxide fire extinguishing system. In FIG. 1, the same components as those in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted. Here, in addition to the above-described delay timer 45, the control unit 41 includes opening and closing doors (not shown) in the operation boxes 33A and 33B.
Is provided in the operation boxes 33A and 33B until the time (about 5 seconds) necessary for confirming the safety due to the evacuation of the personnel in the protection compartments A and B after the opening of the doors has elapsed. A fire extinguishing operation restricting means 46 including a timer 46a for restricting transmission of a start command signal to the starting device 32 even when the start operation button is pressed, and pressing of the start operation button with the opening of the door. Inform the operator of the operation standby time (about 5 seconds), specifically, a voice message such as "This is a fire extinguisher start-up device. Check the situation inside the protective compartment and press the start-up operation button." The notifying means 47 for outputting through the speakers 44A and 44B and the timer 46a in the fire extinguishing operation restricting means 46 notify the start-up completion state in which the time has expired. Press the button for dynamic operation "
Is transmitted to the speakers 44A and 44B.
And an informing means 48 for re-outputting the information. In addition, as a notification tool in each of the notification means 47 and 48, in addition to a speaker for outputting a voice message, an LED or an LC
A super display using D may be used.

In the safety device for a carbon dioxide fire extinguishing system having the above-described configuration, a fire operation flow when the system is manually started is as shown in FIG. In the following description, a flow when a fire occurs in the protection section A will be described. However, the same applies to a case where a fire occurs in another protection section B. First, a person who has found and confirmed a fire (step S20) opens the opening / closing door of the operation box 33A (step S21), and accordingly, an evacuation alarm such as a voice alarm is output (step S22), and a notification unit is issued. The voice message corresponding to the pressing operation waiting time (about 5 seconds) such as 47 is activated, such as "This is the starting device of the fire extinguishing equipment. Please check the situation inside the protective zone and press the button for starting operation." Is output through the speaker 44A (step S23). At the same time, the timer 46a of the fire extinguishing operation restricting means 46 starts a time counting operation, and it is determined whether or not a predetermined time (5 seconds) set to a length that can confirm that the personnel in the protection section A have evacuated has elapsed. A determination is made (step S24). During this time, even if the start operation button is pressed, the start command signal is not transmitted to the start device 42 due to the restricting action of the fire extinguishing operation restricting means 46.

When the timer 46a of the fire extinguishing operation restricting means 46 has timed out (a predetermined time has elapsed), the notifying means 48 is activated, which corresponds to a start-up ready state such as "press the start-up operation button". The voice message is output again through the speaker 44A (step S25). Upon receiving the output voice message, the start operation button in the operation box 33A is pressed (step S26). For example, information for stopping or taking out and moving a device such as a ventilation fan in A is output (step S27).

Simultaneously with the pressing operation of the start-up operation button, the delay timer 45 in the control section 41 starts measuring time (step S28). Until the delay timer 45 times out (about 25 seconds), it is determined whether or not the fire has been extinguished or extinguished, and the emergency stop operation switch in the operation box 33A has been pressed. (Step S29), and if there is an operation, step S29 is performed.
At the same time, the information output for stopping or moving the equipment in the protection section A is restored (step S30). If the delay timer 45 has timed out without any operation (step S31), the control unit 41
, An activation command signal is output to the activation device 32, the corresponding opening device 39 is opened, the corresponding selection valve 37A is opened (step S32), and the carbon dioxide fire extinguishing agent in the carbon dioxide container 36 is discharged. It is discharged from the head 30A into the protection compartment A via the pipes 35 and 34A (step S33).

At this time, the closing valve 3 which is open at the same time
The pressure switch 42A installed downstream of the air conditioner 8 is activated (step S34), and upon receiving the pressure detection signal, the charge indicator light 43A provided outside the vicinity of the protection section A is turned on to fill the fire extinguishing agent. To the outside (step S3
5).

The fire operation flow chart shown in FIG.
When a has timed out, the notifying means 48 operates,
The voice message corresponding to the start-up ready state such as “press the start-up operation button” is output to the speaker 44.
Although the case of re-outputting through A (44B) has been described, the output of such a voice message in a ready-to-start state (step S25) may be omitted, and in this case, the notification means 48 becomes unnecessary. Further, in the above embodiment, the opening / closing door of the operation box 33A (33B) is opened, and the evacuation alarm such as an audio alarm is output, and the notifying means 47 is operated, so that "this is a starting device for the fire extinguishing equipment. Press the start-up operation button after confirming the situation in the section, and send a voice message corresponding to the pressing operation standby time (about 5 seconds) to the speaker 44A (4
4B) and fire extinguishing operation restricting means 46
Although the timer 46a of the timer 46a is started, the timer 46a of the fire extinguishing operation restricting means 46 may be started after the start operation button is pressed once.

FIG. 3 is a flow chart showing a fire operation flow when the safety device of the carbon dioxide fire extinguishing equipment according to another embodiment of the present invention is manually activated. Of the control unit 4
1 until the timer 46a of the fire extinguishing operation restricting means 46 (see FIG. 1) opens the opening / closing door (not shown) in the operation boxes 33A and 33B until a predetermined time (about 5 seconds) elapses. A timer that regulates the transmission of a start command signal to the starter 32 even when a start operation button provided in each of the start boxes 33A and 33B is pressed, and a start operation in the operation boxes 33A and 33B after the timer expires. The timing operation is started from the time when the button is pressed, and the transmission of the start command signal to the start device 32 is permitted only when the press operation is continued for a predetermined time (about 5 seconds) and the time is up. together provided with both functions of the timer, the notification means 48, the former of the timer of the two timers corresponds to the start ready state and activated when the time is up Notification means and the latter of the timer outputs a voice message in which has both functions of the notification unit for outputting a voice message corresponding to the start-up state operates when the time is up.

The flow of a fire operation in the safety device of the carbon dioxide fire extinguishing system having the above-described configuration will be described below with reference to a flow when a fire occurs in one protection section A. First, find and confirm the fire (step S2
0) opens the door of the operation box 33A (step S)
21) Along with this, an evacuation alarm such as a voice alarm is output (step S22), and the notification means 47 is issued.
Is activated, and a voice message corresponding to the pressing operation waiting time (about 5 seconds) such as "This is a starting device for fire extinguishing equipment. Please check the situation inside the protective compartment and press the button for starting operation" The signal is output through the speaker 44A (step S23). At the same time, one of the timers in the fire extinguishing operation restricting means 46 starts a time counting operation, and determines whether or not a predetermined time (5 seconds) has elapsed (step S24). During this time, even if the start operation button is pressed, the start command signal is not transmitted to the start device 32 due to the restricting action of the fire extinguishing operation restricting means 46.

When one of the timers in the fire extinguishing operation restricting means 46 has timed out (a predetermined time has elapsed), the notifying means 48 is activated, and "the starting operation button is set to five.
Press and hold for two seconds ", a voice message corresponding to the start-up ready state is output again through the speaker 44A (step S25). Upon receiving the output voice message, the start operation button in the operation box 33A is pressed. Operate (step S26).

At the time when the start operation button is pressed, the other timer in the fire extinguishing operation restricting means 46 starts counting time, and whether or not the pressing operation continues for a predetermined time (about 5 seconds). Is determined (step S36),
When the predetermined time has elapsed, the notification means 48 is reactivated,
A voice message corresponding to the start-up state of "fire extinguishing equipment has been started up" is output through the speaker 44A (step S37), and at the same time, for stopping or moving the equipment such as a ventilation fan in the protection section A, for example. Is output (step S27). From now on,
The operation proceeds in the order of step S28 to step S35 as in the case of FIG. 2 and FIG.

In each of the above embodiments, the set time of the timer 46a in the fire extinguishing operation restricting means 46 is sufficient for confirming the evacuation of the personnel in the protection sections A and B and for confirming the correctness of the operation of the operator. Time should be as short as possible.

[0028]

As described above, according to the first aspect of the present invention, when there is no fire, a mistake with the operation box of another facility can be made.
Alternatively, even if the opening / closing door of the operation box is opened due to mischief and the start operation button inside the operation box is pressed, the start command signal is not instantaneously transmitted to the start device, and personnel in the protection compartment are It is possible to cause the activation device to transmit the activation command signal only by pressing the activation operation button after the time required for confirming that the evacuation has elapsed. Therefore, it is possible to prevent unnecessary activation of the fire extinguishing equipment due to erroneous operation or mischievous operation, and to avoid occurrence of a serious situation such as a fatal accident due to accidental release of carbon dioxide in a state where there is a person in the protective compartment. Has the effect of
You.

Further, in the invention of claim 1, case of notifying an operation standby time for starting the operation button is clearly inform the operation procedure at the time of normal fire to the operator,
A predetermined fire extinguishing start can be ensured. Still further, according to the first aspect of the present invention, a state in which the timer of the fire extinguishing operation restricting means has timed out, that is, a state in which the operation restriction is released is notified, so that the pressing operation or pressing of the starting operation button is performed. The next action such as the cancellation of the operation is clearly notified to the operator, so that the predetermined fire extinguishing start can be promptly performed and the operator can evacuate quickly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a safety device of a carbon dioxide fire extinguishing system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a fire operation flow by manual activation of the embodiment.

FIG. 3 is a flowchart showing a fire operation flow by manual activation in another embodiment of the present invention.

FIG. 4 is a system diagram of a carbon dioxide fire extinguishing equipment.

FIG. 5 is a flowchart showing a fire operation flow in a conventional carbon dioxide fire extinguishing system by manual activation.

[Explanation of symbols]

 32 Starting device 33A, 33B Operation box 41 Control unit 45 Delay timer 46 Fire extinguishing operation restricting means 46a Timer 47, 48 Notification means A, B Protection section

Continuation of the front page (56) References JP-A-57-73405 (JP, A) JP-A 64-31768 (JP, U) JP-A 64-31767 (JP, U) JP-A 64-31769 (JP , U) Japanese Utility Model Application Hei 3-58702 (JP, U) Japanese Utility Model Application Hei 4-83267 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62C 35/00-37/50 G05B 9/02

Claims (3)

(57) [Claims] 1. installed in or near a protective compartment,
An operation box with an opening / closing door having a start operation button for giving a start command to the start device of the carbon dioxide fire extinguishing equipment and an emergency stop operation button for canceling the start command, A control unit including a delay timer for operating the carbon dioxide fire extinguishing equipment so as to transmit a start command signal to the starting device of the carbon dioxide fire extinguishing equipment and discharge the fire extinguishing agent after a predetermined time from the time when the button is operated. A safety device for carbon dioxide fire extinguishing equipment comprising: the control unit operates the start operation button until a predetermined time has elapsed since the opening and closing door of the operation box was opened. A safety device for carbon dioxide fire extinguishing equipment, further comprising: a fire extinguishing operation restricting means including a timer for restricting transmission of a start command signal to the starting device. 2. The safety device for a carbon dioxide fire extinguishing facility according to claim 1 , further comprising a notifying unit for notifying an operation standby time for the activation operation button when the opening / closing door of the operation box is opened. 3. The safety device for a carbon dioxide fire extinguishing system according to claim 1 , further comprising: a notifying unit that notifies a start-up completion state in which a timer of the fire extinguishing operation restricting unit has expired .