JP2000279542A - Sprinkler fire extinguishing facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make continuable the discharge of water when a fire receiving panel causes an abnormality without stopping the discharge of water unpreparedly by a simple configuration. SOLUTION: In the sprinkler fire extinguishing facility which is provided with a closing type sprinkler head 1, a fire sensor 20, a sprinkler control panel 25, and a fire receive panel 23 to supply water for fire extinguishing to the sprinkler head 1 by opening a control valve 11 in a normal monitoring state and stop the supply of water for fire extinguishing to the sprinkler head 1 by closing the control valve 11 when flowing water of water for fire extinguishing is detected and there is no fire signal, the sprinkler control panel 25 is provided with a function detection part 27 detecting whether the fire receive panel 23 is normal or not using a sensor circuit 21. When flowing water is detected, there is no fire signal, and it is detected that the fire receive panel is not normal by the function detection part 27, the supply of water for fire extinguishing to the sprinkler head 1 is continued.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler fire extinguishing system for extinguishing fire by discharging fire extinguishing water from a sprinkler head when a fire occurs, and more particularly to a sprinkler fire extinguishing system having a water loss prevention function having a function of stopping water discharge when abnormal water discharge occurs. About.

[0002]

2. Description of the Related Art Conventionally, as this type of sprinkler fire extinguishing equipment, there is one disclosed in, for example, JP-A-10-5365. FIG. 3 shows the overall configuration of this conventional sprinkler fire extinguishing system. In FIG. 3, the sprinkler fire extinguishing system mainly performs water discharge with each dwelling unit of an apartment house as one fire extinguishing compartment, and a closed sprinkler head 51 is disposed in each room of each fire extinguishing compartment.
Fire extinguishing water is supplied to the sprinkler head 51 from a water supply main pipe 53 via a branch pipe 52.

One end of the water supply main pipe 53 is connected to a fire pump 54.
Is connected to the water storage tank 55. Water supply main 5
A pressure tank 56 is branched and connected to 3, and the pressure in the water supply main pipe 53 is maintained at a specified pressure by the pressure tank 56. The pressure tank 56 is provided with a pressure switch 57. When the pressure switch 57 detects that the sprinkler head 51 has been operated and the pressure in the water supply main pipe 53 has fallen below a predetermined level, the pump control panel is controlled. At 58, the motor 59 is driven to operate the fire pump 54, and fire water is supplied to the water main 53. Thereby, water discharge is continuously performed. The other end of the water supply main pipe 53 is drawn into the elevated water tank 60. Then, fire extinguishing water is supplied from the elevated water tank 60 to the water supply main pipe 53, and the water supply main pipe 53 is always filled with fire extinguishing water.

[0004] The branch pipe 52 is provided with a control valve 61 and a flowing water detecting device 62. The control valve 61 controls the supply of fire-extinguishing water by opening and closing the branch pipe 52, and is kept open in the steady monitoring state. Therefore, in the steady monitoring state, the fire extinguishing water is supplied to each sprinkler head 51 via the control valve 61.
Supplied to

A running water detecting device 62 is provided on the secondary side of the control valve 61 and has a running water detecting switch 63. When the sprinkler head 51 detects a valve opening or a pressure drop due to a water flow generated by the discharge of fire extinguishing water when the sprinkler head 51 is operated by receiving heat from a fire, a flowing water signal is output from the flowing water detection switch 63. Is output. This running water signal is output to the sprinkler control panel 65 via the fire extinguishing repeater 64. A control signal from the sprinkler control panel 65 to the control valve 61 is also output via the fire extinguishing repeater 64. In addition, the terminal test valve 66 and the orifice 6
7 and a pressure gauge 68 are provided.
When the is opened, the amount of fire extinguishing water determined by the orifice 67 flows through the branch pipe 52, and the running water detection device 62 can be simulated to perform a test operation.

A fire detector 70 is disposed in each room of each fire extinguishing section. The fire detector 70 is connected to a fire alarm repeater 72 via a detector line 71. When a fire is detected, a fire signal is output by short-circuiting the detector line 71 with low impedance. The fire signal output from the fire detector 70 is input to the fire receiving panel 73 via the fire relay 72. When the fire signal is input in this way, the fire receiving panel 73 outputs a notification signal to the sprinkler control panel 65.

In the fire receiving panel 73, the presence or absence of disconnection of the sensor line 71 is monitored, and if a disconnection has occurred, a failure signal is output to the sprinkler control panel 65. Specifically, in the fire receiving panel 73, a very small current flowing through the sensor line 71 is always detected,
When the minute current is no longer detected, it is determined that a disconnection has occurred, and a failure signal is output.

In the thus configured sprinkler fire extinguishing system, the sprinkler control panel 65 keeps the control valve 61 open in the steady monitoring state, and
It monitors the presence or absence of a running signal from the running water detection switch 63 and a fire signal from the fire receiving panel 73. Thereafter, the sprinkler head 51 receives heat generated by the fire.
When the fire extinguishing water is discharged by the operation of, the flowing water detecting device 62 operates and a flowing water signal is output to the sprinkler control panel 65. When the running water signal is output, the sprinkler control panel 65 checks the presence or absence of a fire signal and a failure signal, and controls the opening and closing of the control valve 61 based on the result.

More specifically, when a fire signal is output, the control valve 61 is maintained in an open state assuming that water is discharged normally. When the water is discharged by the sprinkler head 51 in this manner, the pressure switch 57 detects that the pressure in the water supply main pipe 53 has fallen below a predetermined level, and the pump control panel 58 drives the motor 59 so that the fire pump 54 To drive. By operating the fire pump 54 in this manner, the sprinkler head 51 continuously discharges water. When the fire is extinguished, the sprinkler control panel 65 controls the control valve 61 to close.

Conversely, if the fire signal is not output despite the output of the running water signal, the control of the control valve 61 is further performed by confirming the presence or absence of a failure signal. Specifically, when no fire signal is output and no failure signal is output, the sprinkler control panel 65
Outputs a control signal to the control valve 61 via the fire extinguishing repeater 64, and controls the control valve 61 to a closed state. Therefore, even if the sprinkler head 51 has started to discharge water due to damage, etc., even if no fire has occurred, the water discharge should be automatically stopped to minimize water damage. Can be.

On the other hand, when the fire signal is not output and the failure signal is output, the control valve 61 is kept open and the water discharge is continued. Therefore, if a fire signal is not output due to disconnection of the sensor line 52 in spite of the occurrence of fire, careless stopping of water discharge is prohibited.

[0012]

However, in such a conventional sprinkler fire extinguishing system, the presence or absence of a failure in the fire detection system is detected only by the presence or absence of a failure signal from the fire receiving panel 73. In some cases, detection could not be performed. That is, when the power of the fire receiving panel 73 is cut off or when there is a function abnormality in the control CPU or the like inside the fire receiving panel 73, not only the fire signal is output but also the failure signal is not output. In such a case, even if the sprinkler 70 operates normally due to the heat of the fire and the water is discharged and the running water signal is output, the sprinkler control panel 6
No. 5 controls the control valve 61 to the closed state because neither the fire signal nor the failure signal is output from the fire receiving panel 73, and stops the water discharge despite the occurrence of a fire. There was sex.

Particularly, fire receiving boards for ordinary houses are often simply constructed without a backup power supply or the like from the viewpoint of cost reduction, and are not necessarily excellent in reliability. The possibility of shutting off the power of the fire receiving panel as described above was not negligible. In addition, since fire receivers are required to reduce the cost,
It has been desired to solve the above problem without changing the configuration of the fire detector and the fire receiving panel itself.

[0014] The present invention has been made in view of the problems in such a conventional sprinkler fire extinguishing system. With a simple configuration, it is possible to continue water discharge without inadvertently stopping when a fire receiver is abnormal. It is intended to provide a sprinkler fire extinguishing system.

[0015]

SUMMARY OF THE INVENTION In order to solve the problems of the conventional sprinkler fire extinguishing system, the present invention according to the present invention comprises a closed sprinkler head and a fire detector arranged in each fire extinguishing section. A sprinkler control panel that controls a control valve that supplies fire-extinguishing water to the sprinkler head, and a fire reception panel that receives a fire signal from the fire detector and outputs the fire signal to the sprinkler control panel. Supplying the fire extinguishing water to the sprinkler head by opening the control valve,
When running water for fire extinguishing water supplied to the sprinkler head is detected, and when there is no fire signal from a fire detector corresponding to the detected sprinkler head, the sprinkler control panel is provided with the control valve. In a sprinkler fire extinguishing system that shuts off the supply of fire fighting water to the sprinkler head by closing the sprinkler head, the sprinkler control panel includes a sensor line for transmitting the fire signal from the fire detector to the fire receiving panel. A function detecting means for detecting whether the fire receiving board is normal or not, and when the running water is detected and the fire signal is absent, the function detecting means detects the fire reception. If it is detected that the panel is not normal, the control valve is kept open to extinguish the fire to the sprinkler head. It is configured as characterized by continuing the supply of water.

According to a second aspect of the present invention, in the first aspect of the present invention, the fire receiving panel detects the presence or absence of a current flowing through the sensor line to determine the disconnection state of the sensor line. Detecting, and when the disconnection state is detected, outputs a failure signal of a pulse corresponding to the disconnection state to the sprinkler control panel, and the function detection unit includes:
The detector line is disconnected at a predetermined timing and at a predetermined interval to set a current flowing through the detector line to a predetermined pulse state, and a fault signal transmitted from the fire receiving board corresponds to the predetermined pulse state. By determining whether or not the fire receiving panel is normal, it is configured to detect whether or not the fire receiving panel is normal.

According to a third aspect of the present invention, in the second aspect of the present invention, the fire receiving board outputs the failure signal only when the disconnection state is continuously detected for a predetermined time or more. The function detection means is configured to keep the sensor line disconnected for the predetermined time or more.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, a switch for disconnecting the sensor line is provided at a terminal side of the sensor line, and the function detection is performed. The means is configured to generate the predetermined pulse state via the switch.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of a sprinkler fire extinguishing system of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of a sprinkler fire extinguishing system, and FIG. 2 is a flowchart of sprinkler control. In FIG. 1, the sprinkler fire extinguishing equipment of this embodiment mainly discharges water with each dwelling unit of an apartment house as one fire extinguishing compartment, and a sprinkler head 1 is disposed in each room of each fire extinguishing compartment. The sprinkler head 1 is configured as a closed type, and when it receives heat from a fire, it is automatically opened by melting the metal inside the sprinkler head 1 and the like, and starts discharging water.

The sprinkler head 1 is connected to a water supply main line 3 via a branch pipe 2.
And fire extinguishing water is supplied to the sprinkler head 1 via the branch pipe 2. One end of the water supply main pipe 3 is drawn into a basement of a building or the like, and is connected to a water storage tank 5 via a fire pump 4. A pressure tank 6 is branched and connected to the water supply main pipe 3, and the pressure inside the water supply main pipe 3 is maintained at a specified pressure by pressurizing the water supply main pipe 3 with the pressure tank 6. The pressure tank 6 is provided with a pressure switch 7. When the pressure switch 7 detects that the sprinkler head 1 has been operated and the pressure in the water supply main pipe 3 has dropped below a predetermined value, the pump control panel is controlled. 8, the motor 9 is driven to operate the fire pump 4 and the water storage tank 5
The fire extinguishing water in the inside is continuously supplied to the water supply main pipe 3. Thereby, water discharge is continuously performed. When the fire pump 4 is operating, a pump operation signal indicating that fact is output from the pump control panel 8 to a living room receiving panel 24 described later. The other end of the water supply main pipe 3 is drawn into an elevated water tank 10 arranged at a high place such as a building roof. Then, fire extinguishing water is supplied from the elevated water tank 10 to the water supply main pipe 3 by its own weight, and the water supply main pipe 3 is always filled with fire extinguishing water.

The branch pipe 2 drawn from the water supply main pipe 3
Is provided with a control valve 11 and a running water detection device 12. The control valve 11 controls the supply of fire-extinguishing water by opening and closing the branch pipe 2. Specifically, the control valve 11 is a motor-driven valve driven by a motor under the control of a control unit 28 of a sprinkler control panel 25 described later. Is configured as The control valve 11 is maintained in an open state in a steady monitoring state described later. Therefore, in the steady monitoring state, the fire extinguishing water is supplied to each sprinkler head 1 via the control valve 11, and is in the same pressurized water supply state as the wet type sprinkler equipment.

A bypass valve 13 is connected in parallel to the control valve 11. When the control valve 11 cannot be controlled, the bypass valve 13 is manually opened and closed to supply fire extinguishing water. Can be stopped. This bypass valve 13 is closed in the steady monitoring state. A pressure detecting device 14 provided on the secondary side of the control valve 11
Outputs a pressure signal when the pressure in the branch pipe 2 is equal to or higher than a specified pressure.

The running water detecting device 12 is provided on the primary side of the control valve 11, and the sprinkler head 1 is operated by receiving heat from a fire. Is detected.
When the flowing water detecting device 12 detects the opening of the valve or a decrease in pressure, the flowing water detection switch 15 is turned on, and a flowing water signal is output from the flowing water detection switch 15. A terminal test valve 16, an orifice 17, and a pressure gauge 18 are provided on the terminal side of the branch pipe 2. When the terminal test valve 16 is opened, the amount of fire extinguishing water determined by the orifice 17 is supplied to the branch pipe 2. The test operation can be performed by simulating the flow and the flowing water detection device 12.

A fire detector 20 is arranged in each room of each fire extinguishing section. The fire detector 20 is connected to a fire receiving board 23 through a detector line 21 which is a double line and a terminal box 22. When a fire is detected, the fire detector 20 is short-circuited with a low impedance to generate a fire signal. Is output. This fire signal is input to the fire receiving panel 23, and at the same time, to the dwelling building receiving panel 24 to indicate that a fire has occurred.

The fire receiving panel 23 is provided for each dwelling unit serving as a fire extinguishing compartment, and outputs a fire signal output from the fire detector 20 to the sprinkler control panel 25 as a notification signal. In the fire receiving panel 23,
The disconnection of the sensor line 21 is monitored. If a fault has occurred, a fault signal is output from the fire receiving panel 23 to the sprinkler control panel 25. Specifically, in the fire receiving panel 23, a minute current flowing through the sensor line 21 is always detected, and when the minute current is no longer detected, it is determined that a fault has occurred and a fault signal is output. You. The failure signal is continuously output while the minute current is not detected, and is stopped when the minute current is detected again. That is, the fault signal is output as a pulse corresponding to the minute current.

Next, the configuration of the sprinkler control panel 25 will be described. As described above, the pressure signal output from the pressure detecting device 14, the running water signal output from the running water detection switch 15, the fire signal and the failure signal output from the fire receiving board 23 are input to the sprinkler control board 25. . The sprinkler control panel 25 is provided for each dwelling unit serving as a fire extinguishing compartment, and controls the control valve 11 based on these pressure signals, running water signals, fire signals, failure signals, and the like.

In order to realize such a function, the sprinkler control panel 25 includes a switch 26 for disconnecting the sensor line 21 and a function detecting means for detecting whether the fire receiving panel 23 is normal. And a control unit 28 having a barrel function detection unit 27.

The switch 26 is disposed in the sensor line 21 and is turned on and off at a predetermined interval under the control of the function detection unit 27 at a predetermined interval, thereby turning the sensor line 21 into a disconnected state or a connected state. I do. As a result, the minute current flowing through the sensor line 21 is brought into a predetermined pulse state. In particular, in the present embodiment, the switch 26 is provided downstream of the terminating resistor R1 of the sensor line 21 disposed in the sprinkler control panel 25. Therefore, the fire signal output from the fire detector 20 reaches the fire receiving panel 23 via the detector line 21 regardless of the on / off state of the switch 26, and does not inadvertently hinder fire detection.

The function detecting section 27 drives the switch 26 on and off as described above.
3 is monitored for a fault signal. Then, it is determined whether or not the failure signal output from the fire receiving panel 23 corresponds to a predetermined pulse state (a pulse state generated when the switch 26 is turned on and off). When the failure signal corresponds to a predetermined pulse state, it is determined that the fire receiving board 23 is normal. On the other hand, if no fault signal is output,
If the output failure signal does not correspond to the predetermined pulse state, it is determined that the fire receiving board 23 has a functional abnormality such as power cutoff or CPU abnormality (the fire receiving board 23 is not normal).

From the sprinkler control panel 25, status signals relating to various states such as the operating state of the flowing water detecting device 12 and the open / closed state of the control valve 11 are output to the living room receiving panel 24 to be described later via the terminal box 29. Is done. The sprinkler control panel 25 is provided with an emergency stop switch 30. When the emergency stop switch 30 is pressed, the control valve 11 is closed to stop water discharge. Power is supplied to the sprinkler control panel 25 via a terminal box 31 from a power supply line 32 of 100 VAC for the pump control panel 8.

The receiving board 24 is placed in, for example, a caretaker's office. The pump control panel 8 outputs a pump operation signal, the fire detector 20 outputs a fire signal, or the sprinkler control panel 25 outputs a status signal. At this time, an indicator light (not shown) indicating that these signals are being output is turned on.
This allows the manager to collectively monitor the operation status of the sprinkler fire extinguishing system.

Next, sprinkler control in the sprinkler fire extinguishing system configured as described above will be described with reference to FIG.
This will be described with reference to FIG. First, at the start of control (step S
In 1), the control valve 11 is controlled to the open state by the initial control defaulted to the control unit 28, and the fire extinguishing water is filled up to the sprinkler head 1. Thereafter, the presence or absence of a running water signal and a fire signal is monitored (steady monitoring state, steps S2 and S3). Here, the pressure detecting device 14 detects that the pressure of the branch pipe 2 is equal to or higher than a specified pressure, and outputs a pressure signal. Since no fire has occurred at this time, no fire signal is output. Therefore, the open state of the control valve 11 is maintained by steps S2, S3, and S7.

When a fire signal is first detected in step S3, the controller 28 determines that a fire has occurred and maintains the open state of the control valve 11 (step S3).
4). And sprinkler head 1 by the heat of fire
Automatically operates to discharge water to the fire extinguishing section. When the pressure switch 7 detects that the sprinkler head 1 has been operated and the pressure in the water supply main pipe 3 has dropped below a predetermined level, the pump control panel 8 drives the motor 9 to start the fire pump 4. Driving and water discharge are continued.

Thereafter, it is monitored whether or not the emergency stop switch 30 has been pressed (step S5). When the emergency stop switch 30 is pressed, there is no need to perform any more water discharge, so a control signal is output from the control unit 28 to the control valve 11, and the control valve 11 is closed (Step S).
6). As a result, the water discharge by the sprinkler head 1 is stopped, and the water discharge is prevented from being performed more than necessary. In addition to the stoppage of the water discharge, the operator may use the water flow detection device 12.
The water discharge can be stopped by closing the valve. Further, as will be described later, when the fire signal is turned off, the control valve 11 is controlled to be closed, and the water discharge is stopped.

The reason why the presence or absence of the pressure signal is confirmed in step S7 is to prevent the hunting operation of the control valve 11. That is, in the case where the sprinkler head 1 malfunctions due to damage or the like, if the control valve 11 is closed because no fire signal is output, water discharge from the sprinkler head 1 stops and the running water signal is turned off. Becomes Since this is the same state as the steady monitoring state, when the control valve 11 is opened and the recovery condition is determined to be satisfied, the damaged sprinkler head 1
Water discharge is started again from. Therefore, the opening and closing of the water discharge are repeated, and the water is intermittently discharged from the damaged head. To prevent such adverse effects,
When the pressure signal is output, it is determined that the sprinkler head 1 is replaced after the water is discharged in the steady monitoring state or that the condition for recovery is satisfied, and the control valve 11 is opened. On the other hand, when the pressure signal is not output, it is determined that the fire signal after the operation of the sprinkler head 1 is waiting or the sprinkler head is damaged, and the control valve 11 is controlled to close.

On the other hand, if a running water signal is detected in step S2 before a fire signal is detected in the steady monitoring state, first, the control unit 28 checks whether a fire signal is output (step S9). . If a fire signal is output here, it is determined that a fire has occurred and the water discharge of the sprinkler head 1 is normal, and step S
Then, the control valve 11 is maintained in the open state to continue the water discharge. Subsequent steps are the same as steps S5 and S6 described above.

If a fire signal is not output in step S9, there is a possibility that the fire signal is not output because the detector line 21 is disconnected even though a fire has actually occurred. In order to confirm this possibility, the control unit 28 confirms whether or not a failure signal has been output from the fire receiving panel 23 (step S10). If the failure signal is output, it can be determined that the sensor line 21 is disconnected, and it can be determined that there is a possibility that a fire has actually occurred. 11 is maintained in the open state, and the water discharge is continued. Subsequent steps are the same as steps S5 and S6 described above. Therefore, even when the sensor line 21 is disconnected, the water discharge is not inadvertently stopped.

On the other hand, if the output of the failure signal is not confirmed in step S10, there is a possibility that the fire has not actually occurred, and the fire receiving board 23 has not actually fired even though the fire has actually occurred. There is a possibility that a fire signal or a failure signal is not output due to a functional abnormality such as a power shutdown or a CPU abnormality. In order to confirm this possibility, the function detection unit 27 of the control unit 28 turns on and off the switch 26 at a predetermined interval at a predetermined timing, and brings the sensor line 21 into a disconnected state or a connected state (step S11). As a result, the minute current flowing through the sensor line 21 is brought into a predetermined pulse state.

When the switch 26 is driven in this manner, the function detection unit 27 monitors the failure signal output from the fire receiving panel 23, and determines whether or not the failure signal is output, and Is determined to correspond to a predetermined pulse state (step S12). If the failure signal is not output or if the output does not correspond to the predetermined pulse state, the power of the fire receiving panel 23 is cut off or the CP is stopped.
It is determined that a functional abnormality such as a U abnormality exists. in this case,
The process proceeds to step S4, where the control valve 11 is kept open to continue water discharge. Thereafter, the above steps S5 to S8
Is the same as Therefore, even when the fire receiving panel 23 is out of order, the water discharge is not inadvertently stopped.

On the other hand, in step S12, if a failure signal is output and it is confirmed that this failure signal corresponds to a predetermined pulse state, a functional abnormality such as a power cut-off of the fire receiving panel 23 or a CPU abnormality is detected. It can be determined that there is no fire and that no fire has actually occurred, and the water discharge can be determined to be due to sprinkler breakage or water leakage.
Then, the process goes to 6 to control the control valve 11 to be closed. Therefore, as in the conventional case, when water discharge is started even though no fire has actually occurred, water discharge can be automatically stopped to minimize water damage. When the fire receiving board 23 is restored during the water discharge by the sprinkler head 1 and the output of the fire signal is stopped, steps S2 → S9 → S10 → S11 → S12 → S
The closing of the control valve 11 is controlled by 6, and the water discharge is stopped. In such steps S1 to S12, sprinkler control is performed by monitoring the state of the three signals of the flowing water signal, the fire signal, and the pressure signal and the state of the fire receiving panel 23.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea. Therefore, these different modes will be described below. First, the sprinkler fire extinguishing equipment to which the present invention is applied is not limited to general dwelling units, and may be applied to, for example, building equipment in which a fire receiving panel 23 and a sprinkler control panel 25 are collectively provided in a monitoring room or the like. Good.
Further, as the overall configuration of the sprinkler fire extinguishing equipment, a different configuration other than the illustrated configuration may be employed. For example, the control valve 11 may be provided on the primary side of the flowing water detection device 12.

Also, the fire receiving panel 23 by the function detecting section 27
May be detected by any method other than disconnecting the sensor line 21. For example, detector line 2
This may be performed by inputting a current of a specific frequency to 1 and determining whether or not the frequency of the fault signal corresponds to the specific frequency. Alternatively, a resistor may be intermittently connected to the sensor line 21 to increase the resistance value of the line, thereby reducing the line current to create a specific pulse state as a pseudo disconnection state. In addition, it is also possible to output various signals from the fire receiving panel 23 to the sprinkler control panel 25 to indicate the normality of the fire receiving panel 23 itself. However, in general, the fire receiving panel 23 is simply configured from the viewpoint of low cost, and it is difficult to add a new configuration. It is the simplest configuration that the sensor line 21 is disconnected as in the above embodiment. Therefore, according to the above embodiment, the lowest cost and most reliable normality detection system of the fire receiving panel 23 is provided. Can be built.

In the above-described embodiment, it is assumed that when the minute current from the sensor line 21 is no longer detected, it is determined that a fault has occurred and a fault signal is output from the fire receiving panel 23. did. However, the fire receiving panel 23 may be provided with a so-called storage function in order to improve the reliability of the failure determination. The accumulation function is a function of outputting a failure signal only when a minute current is continuously detected for a predetermined time (for example, T1) or more. When such a storage function is provided in the fire receiving panel 23, the function detection unit 27 drives the switch 26 corresponding to the storage function. Specifically, the function detection unit 27 drives the switch 26 at intervals of T1 or more. In this case,
A failure signal corresponding to the pulse state generated by driving the switch 26 can be reliably output from the fire receiving panel 23. Therefore, the fire receiving panel 23 having the storage function
, The normality can be reliably detected.
Further, such a storage function may be appropriately used when the function detection unit 27 detects the normality of the fire receiving board 23 or performs other determination.

[0044]

As described above, according to the first aspect of the present invention, the sprinkler control panel uses a fire detector line for transmitting a fire signal from the fire detector to the fire receiver panel. Equipped with a function detecting means for detecting whether the receiver is normal or not, when running water is detected and there is no fire signal, and when it is detected that the fire receiver is not normal, the sprinkler head is The control valve is kept open and water discharge is continued when there is a functional abnormality such as a power failure of the fire receiving panel or a CPU abnormality. Inadvertently stopping water discharge when the panel is abnormal is prohibited.
Therefore, fire extinguishing can be performed more reliably and safely.

In addition, according to the present invention, the fire receiving panel outputs a fault signal to the sprinkler control panel when the disconnection state is detected, and the function detecting means detects the current flowing through the sensor line. Is set to a predetermined pulse state, and by judging whether or not the failure signal sent from the fire receiving panel corresponds to the predetermined pulse state, it is detected whether the fire receiving panel is normal or not. The normality of the fire receiver can be detected without adding a new configuration to the receiver. Further, since the simplest configuration is to make the detector line disconnected, it is possible to construct the lowest cost and most reliable normality detection system of the fire receiver.

According to the third aspect of the present invention, the fire receiving panel outputs a failure signal only when the disconnection state is continuously detected for a predetermined time or more, and the function detecting means keeps the sensor line connected for a predetermined time or more. In this way, a failure signal corresponding to the created pulse state can be reliably output from the fire receiving board to the function detecting means by setting the disconnection state. Therefore, the normality of a fire receiving panel having a so-called storage function can be reliably detected.

Further, according to the present invention, a switch for disconnecting the sensor line is provided at the terminal side of the sensor line, and the function detecting means generates a predetermined pulse state via the switch. Thus, the fire signal output from the fire detector reaches the fire receiving panel regardless of the on / off state of the switch, and does not inadvertently hinder fire detection.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire configuration of a sprinkler fire extinguishing system according to an embodiment of the present invention.

FIG. 2 is a flowchart of sprinkler control.

FIG. 3 is a diagram showing an entire configuration of a conventional sprinkler fire extinguishing system.

[Explanation of symbols]

 1,51 Sprinkler head 2,52 Branch pipe 3,53 Water supply main pipe 4,54 Fire pump 5,55 Water tank 6,56 Pressure tank 7,57 Pressure switch 8,58 Pump control panel 9,59 Motor 10,60 Elevation Water tank 11, 61 Control valve 12, 62 Flowing water detector 13 Bypass valve 14 Pressure detector 15, 63 Flowing water detection switch 16, 66 Terminal test valve 17, 67 Orifice 18, 68 Pressure gauge 20, 70 Fire detector 21, 71 Sensing Unit lines 22, 29, 31 Terminal box 23, 73 Fire receiving panel 24 Residential building receiving panel 25, 65 Sprinkler control panel 26 Switch 27 Function detecting unit 28 Control unit 30 Emergency stop switch 32 Power line 64 Fire extinguishing repeater 72 Fire report Repeater

Claims (4)

[Claims] 1. A closed sprinkler head and a fire sensor disposed in each fire extinguishing section, a sprinkler control panel for controlling a control valve for supplying fire extinguishing water to the sprinkler head, and a fire signal from the fire sensor And a fire receiving board for receiving the fire extinguishing water and supplying the fire extinguishing water to the sprinkler head in a steady monitoring state by supplying the fire extinguishing water to the sprinkler head by opening the control valve. Is detected, and when there is no fire signal from the fire detector corresponding to the sprinkler head in which the flowing water is detected, the sprinkler control panel closes the control valve to set the sprinkler head to the sprinkler head. In a sprinkler fire extinguishing system for stopping the supply of fire water, the sprinkler system The board includes a function detecting unit that detects whether the fire receiving board is normal by using a detector line for transmitting the fire signal from the fire sensor to the fire receiving board, When the running water is detected and the fire signal is absent, when the function detection unit detects that the fire receiving board is not normal, the control valve is maintained in an open state to maintain the control valve in an open state. Sprinkler fire extinguishing equipment, characterized by continuing to supply fire extinguishing water to the sprinkler head. 2. The fire receiving board detects a disconnection state of the sensor line by detecting the presence or absence of a current flowing in the sensor line. If the disconnection state is detected, the fire reception panel detects the disconnection state. A fault signal of a corresponding pulse is output to the sprinkler control panel, and the function detecting means sets the current flowing through the sensor line to a predetermined value by disconnecting the sensor line at a predetermined timing at a predetermined interval. By detecting whether the fire receiving board is normal by judging whether or not the fault signal transmitted from the fire receiving board corresponds to the predetermined pulse state, Claim 1.
Sprinkler fire extinguishing equipment as described. 3. The fire receiving board outputs the fault signal only when the disconnection state is continuously detected for a predetermined time or more, and the function detecting means continues the sensor line for the predetermined time or more. The sprinkler fire extinguishing equipment according to claim 2, wherein the fire is set to a disconnection state. 4. A switch for disconnecting the sensor line is provided at an end of the sensor line, and the function detecting means generates the predetermined pulse state via the switch. The sprinkler fire extinguishing system according to claim 2 or 3, wherein