JP2001276270A - Fire-extinguishing facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly inhibit disaster of water losses when spraying water. SOLUTION: A control valve 12 for controlling the supply of water for extinguishing fire is provided at the pre-stage of a fire-extinguishing head 1, a fire detector 14 such as the detector of heat or smoke for monitoring fire at a monitoring area is installed at the monitoring area, and further a flame detector 20 for detecting the light of fire is installed at the monitoring area. Water for extinguishing fire starts to be sprayed based on the reporting of the heat or fire detector 14, the state of the flame detector 20 is monitored while is sprayes and the extinction of fire is judged from the non-reporting state of the flame detector 20, thus the control valve 12 is closed to stop spraying water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing system for extinguishing a fire by spraying fire extinguishing water from a fire extinguishing head when a fire occurs.

[0002]

2. Description of the Related Art As a conventional fire-extinguishing facility, a fire-extinguishing head is connected to a fire-extinguishing pipe, and water is sprayed when the fire-extinguishing head detects a fire and operates. In such a fire extinguishing system, if the fire extinguishing head operates during a fire, water is continuously discharged, so if the fire extinguishing head malfunctions, water damage is large and fire extinguishing water is wasted. was there. FIG. 11 shows an example of a facility for solving such a problem of the fire extinguishing system (Japanese Patent Laid-Open No. 10-5365).

[0003] In FIG. 11, a fire extinguishing pump 101 and a motor 102 are installed on a basement floor of a building or the like.
Is operated to pump up the fire extinguishing water in the water storage tank 103 and supply it under pressure to a water supply main pipe 104 which is piped in a vertical direction of the building. An elevated water tank 105 is installed on the roof of the building, and the water main 104 is always filled with fire extinguishing water.

In order to operate the fire pump 101 for maintaining the internal pressure of the water supply main pipe 104 at a specified pressure, a pressure tank 113 is connected in a branched manner, and the internal pressure of the water supply main pipe 104 is introduced to compress the internal air. are doing. Pressure tank 1
13 is provided with a pressure switch 114. When the pressure in the pipe falls below a specified pressure by the operation of the sprinkler head (fire extinguishing head) 110, the pressure switch 114 is turned on. To drive the fire pump 101.

A branch pipe 106 is drawn out from the water supply main pipe 104 for each floor of the building via a flowing water detecting device 108, and a closed type sprinkler head 110 is connected to a branch pipe on the secondary side of the flowing water detecting device 108. ing. Further, a control valve 107 is provided on the primary side of the flowing water detecting device 108.

The control valve 107 is, for example, a motor-operated valve that can be opened and closed by driving a motor, and is kept open in a steady monitoring state. Therefore, the pressure in the water supply main pipe 104 is
The sprinkler head 11 on the secondary side passes through the control valve 107 and the flowing water detecting device 108 in the open state of the branch pipe 106.
0, and is in the same pressurized water supply state as the conventional wet sprinkler equipment.

[0007] The running water detection device 108 is a running water detection switch 1
09, sprinkler head 1 due to fire
10 operates to detect a valve opening or a pressure drop due to a water flow when the fire extinguishing water is discharged, and detects a flowing water detection switch 109.
Is turned on to output a running water detection signal.

[0008] The terminal test valve 11 is provided at the end of the branch pipe 106.
1 and the orifice 112 are connected, and a pressure gauge 142 is further provided. When the terminal test valve 111 is opened at the time of inspection, the amount of water corresponding to the operation of one sprinkler head determined by the orifice 112 flows, thereby simulating the operation of the flowing water detection device 108 to perform a test operation such as a pump operation. Can be.

A running water detection signal from a running water detection switch 109 provided in the running water detection device 108 is transmitted to a fire extinguishing repeater 117.
To the sprinkler control panel 116. The control valve 10 from the sprinkler control panel 116
7 is also output via the fire extinguishing repeater 117.

On the other hand, a fire detector 118 is installed in a protection section of the sprinkler head 110. Fire detector 1
Reference numeral 18 is connected to a sensor line from the fire alarm repeater 120, detects a fire, outputs a fire detection signal to the fire receiving panel 121 via the fire alarm repeater 120, and determines that a fire has occurred. You. When a fire is determined by the fire receiving panel 121, a fire detection signal E20 is transmitted to the sprinkler control panel 116 as a notification signal.

When the sensor line is disconnected,
A failure signal E30 is transmitted from the fire receiving panel 121 to the sprinkler control panel 116.

The sprinkler control panel 116 supplies the fire extinguishing water to the sprinkler head 110 by opening the control valve 107 in the steady monitoring state,
8, when running water is detected, if there is a fire detection signal from the fire receiving panel 121, the control valve 107 is kept open,
Continue discharging water from the activated sprinkler head.
Also, when flowing water is detected by the flowing water detection device 108,
If there is no fire detection signal, the control valve 107 is closed and the supply of fire extinguishing water is stopped. If there is a fire detection signal, the control valve 107 is opened and water discharge is resumed. If there is no fire signal, the sprinkler head is turned off. Prohibit water discharge as a malfunction and reduce damage from water damage.

As described above, in the fire extinguishing system shown in FIG.
Even if the fire extinguishing head is operated by mistake, the damage due to water damage can be prevented by closing the control valve since there is no fire detection signal from the fire detector.

[0014]

However, in such a conventional fire extinguishing system, when a fire occurs, there are two conditions (an alarm of a fire detector and an operation of a fire extinguishing head).
Once the water is discharged under the condition (D), the water is continuously discharged. Therefore, even after the flame is extinguished, the water for fire extinguishing is sprayed, and there is a problem that water damage is increased.

[0015] It is an object of the present invention to provide a fire extinguishing system capable of further suppressing damage caused by water damage during watering.

[0016]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention relates to a fire extinguishing system for spraying fire extinguishing water from a fire extinguishing head connected to a branch pipe branched from a water supply main pipe in the event of a fire. A fire detector installed in the area to detect heat or smoke due to a fire, a fire sensor installed in a monitoring area to detect radiant energy from the fire and heat from the fire source, and a water supply main side from the fire extinguishing head A control valve that is provided in the fire extinguishing head and supplies and stops the fire extinguishing water, and allows the fire extinguishing head to sprinkle the fire extinguishing water when the fire detector detects a fire, and from the non-reporting state of the flame sensor during water sprinkling. And a control unit that controls opening and closing of the control valve so as to judge fire suppression and stop watering.

As described above, according to the present invention, a control valve for controlling the supply of fire extinguishing water is provided at a stage preceding the fire extinguishing head, and a fire detector such as a heat detector or a smoke detector for monitoring a fire in the area is provided in a monitoring area. A fire detector that detects the light of the flame is installed in the monitoring area, and the discharge of fire extinguishing water is started based on the alarm from the heat or smoke detector, and the condition of the fire detector is monitored during water sprinkling. However, when the flame detector does not detect a fire, it is determined that the fire has been extinguished, and the control valve is closed to stop water discharge, thereby suppressing damage caused by water damage.

As described above, the reason for judging the extinguishing of a fire by using a flame detector instead of a conventionally installed fire detector such as a heat detector or a smoke detector is as follows. (1) After the occurrence of a fire, since the monitoring area is full of smoke, the smoke detector always issues an alarm and cannot detect fire suppression. (2) If the smoke exhaust system in the monitoring area is activated,
Since heat and smoke go to the smoke exhaust system, accurate detection cannot be made with heat sensors or smoke sensors. (3) Since the heat and smoke detectors installed in the monitoring area are sparsely installed, there is a doubt about the accuracy of fire suppression detection. (4) Heat transfer to the sensor side is poor due to the influence of water spray, so that the sensitivity of the heat sensor is low.

However, according to the present invention, the use of a flame detector does not have the above-mentioned disadvantages, and since the fire extinguishing is determined from the non-reporting state of the flame detector, watering is stopped.
Watering can be stopped accurately.

After the spraying is stopped by the flame sensor, the control unit controls the control valve in a fire detection state of the flame sensor.
The control unit determines that the fire is extinguished if the fire detector does not receive a fire detection signal from the fire sensor even after a predetermined time has elapsed when the fire detector self-holds the fire alarm. The control unit is
If the flame sensor is an analog sensor, the analog level according to the level of the flame output from the flame sensor is monitored, and when the flame level falls below a predetermined level, it is determined that the fire is extinguished. Further, as a self-holding type flame detector, the flame detector may detect a fire and automatically recover after transmitting a fire detection signal.

Further, as the fire extinguishing equipment of the present invention, the fire extinguishing head is a closed type, the control valve is always open, the branch pipe is provided with a running water detecting device, and the control unit is a running water detecting device accompanying the operation of the fire extinguishing head. When a fire detection signal is received from a fire detector in the corresponding monitored area when a detection signal is received, the control valve is kept open, and when there is no fire detection signal, the control valve is closed. Take the configuration.

In the fire extinguishing equipment of the present invention, the control valve is always closed, and the control unit receives the fire detection signal from the fire detector and controls the opening of the control valve in the corresponding security zone. Good.

Further, as the fire extinguishing equipment of the present invention, the control valve is a pilot control valve for opening and closing a pre-operation valve provided in the branch pipe, and the control unit controls opening and closing of the pilot control valve by a fire detection signal and a flame detection signal. It may be.

[0024]

FIG. 1 is an explanatory view of a first embodiment of a fire extinguishing system according to the present invention.

In FIG. 1, the sprinkler fire extinguishing system of the present invention performs fire monitoring and fire extinguishing by using, for example, a dwelling unit of an apartment house as one monitoring area. A sprinkler head 1 that functions as a fire-extinguishing head in the dwelling unit that will be the monitored area
Is installed. The sprinkler head 1 is a closed type, and automatically opens and discharges fire extinguishing water by, for example, melting internal metal when receiving heat from a fire.

The sprinkler head 1 is connected to a water supply main pipe 3 via a branch pipe 2, and fire extinguishing water is supplied to the sprinkler head 1 via the water supply main pipe 3 and 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 water supply main pipe 3 is pressurized by the pressure tank 6 to maintain the pressure in the pipe at a specified value. The pressure tank 6 is provided with a pressure switch 7. When the sprinkler head 1 operates and the pressure switch 7 detects that the pressure in the water supply main pipe 3 has fallen below a prescribed value, the pump control panel 8 controls the motor. 9 to drive the fire pump 4 and the water tank 5
The water for fire extinguishing is continuously supplied to the water supply main pipe 3.

When the fire pump 4 is operating, a pump operation signal is output from the pump control panel 8 to the fire control panel 13. Further, the other end of the water supply main pipe 3 is drawn into an elevated water tank 19 installed at a high place such as a building roof, and the water supply main pipe 3 is always filled with fire extinguishing water from the elevated water tank 19 with fire extinguishing water.

The branch pipe 2 branched from the water supply main pipe is provided with a flowing water detecting device 10 having a flowing water detecting switch 11 and a control valve 12. The control valve 12 controls the supply and stop of fire extinguishing water to the sprinkler head 1 by opening and closing the branch pipe 2, and is configured by an electric valve driven by a fire extinguishing control panel 13.

The control valve 12 is always kept open in the steady monitoring state. For this reason, in the steady monitoring state, the fire extinguishing water is supplied to the sprinkler head 1 via the control valve 12, and is in the same pressurized fire extinguishing water supply state as the wet sprinkler equipment.

The water flow detection device 10 turns on the water flow detection switch 11 with a water flow generated by the discharge of fire extinguishing water when the sprinkler head 1 is operated by receiving heat from a fire, and outputs a water flow detection signal E1 to the fire control panel 13 Output to

An end test valve 17 and an orifice 18 are provided at the end of the branch pipe 2. By manually opening the terminal test valve 17, the amount of fire extinguishing water determined by the orifice 18 is caused to flow through the branch pipe 2, the running water detection device 10 is simulated, the running water detection switch 11 is turned on, and the running water detection signal is output. A test operation can be performed on the fire extinguishing control panel 13 by E1.

In the monitoring area where the sprinkler head 1 is installed, a fire detector 14 is installed. The fire detector 14 is connected to a detector line drawn from the receiving panel 16 via the repeater 15. Fire detector 14
Are sensors adapted to the use of the monitored area in accordance with the Fire Service Law, specifically, heat detectors and smoke detectors. When these fire detectors 14 detect a fire in the monitored area, a fire detection signal E2 indicating the fire occurrence location is output to the fire suppression control panel 13 via the fire receiving panel 16.

Further, according to the present invention, a flame detector 20 is installed in the monitoring area as a detector for judging whether a fire has been extinguished. The flame detector 20 is a detector that detects heat accompanying a fire and radiant energy from a flame. Flame detector 20
In this embodiment, the fire extinguishing control panel 13 is connected to a dedicated signal line.
It is connected to the.

Here, the flame detector 20 used in the present invention will be described. Flame detectors include an infrared flame detector and an ultraviolet flame detector.

The infrared flame detector detects an infrared region generated from the flame of a fire or the heat of a fire source to detect a fire. Infrared flame detectors are broadly classified into a fixed radiation type and a fluctuation type.

The principle of detection of the fluctuation type infrared flame detector will be described. The flame at the time of fire includes infrared rays emitted from a large amount of carbon dioxide gas and having a peak at a wavelength of about 4.3 to 4.5 μm, and has a phenomenon of being emitted with a flicker of 2 Hz to 15 Hz. This is a phenomenon that occurs when an object burns, and is called CO ₂ resonance radiation.

As a method of detecting infrared rays detected from the flame, the wavelength of the CO ₂ resonance radiation band is extracted by an optical band-pass filter, and after detection by an infrared detecting element, the flicker frequency of the flame is AC-amplified. Rectifying it
Integrates and sends a fire detection signal to the receiver when the integrated value is equal to or greater than a predetermined value.

The constant emission type sends out a fire detection signal when the amount of received infrared rays including the CO ₂ resonance radiation band has exceeded a predetermined level.

The monitoring pattern of the infrared flame detector has a monitoring angle of about ± 50 ° when installed in an arbitrary direction, a monitoring distance of about 20 m at a monitoring angle of 0 °, and a monitoring angle of ± 50.
Those with a degree of about 13 m have been put to practical use.

Next, the ultraviolet flame detector will be described. The ultraviolet flame detector detects ultraviolet rays emitted when an object burns,
Judge the fire. Its detection principle is UV
A discharge tube (UV tube) called “tron” is used. This discharge tube utilizes the external photoelectric effect, and has a characteristic that it has sensitivity only to ultraviolet rays and has no sensitivity to infrared rays or visible light. The sensitivity wavelength is from 185 nm to 260 nm.

At this time, a voltage is applied to the UV tube, and when light strikes the surface of the plate-type cathode, electrons near the surface absorb the light energy and jump out of the surface,
Upon reaching the anode, discharge begins and current flows through the circuit, sending a pulse to the signal processing circuit.

As the primary accumulation output of the signal processing circuit, "1" is output by the first pulse of the UV tube, and thereafter, if there are two or more pulses within the primary accumulation time of about 1.25 seconds, Is not reset, keeps "1", and if "1" is output for about 10 seconds, it is determined that a fire has occurred. The monitoring pattern of the ultraviolet flame detector has a monitoring angle of ± 50 ° when installed in an arbitrary direction, and the monitoring distance is about 25 to 30 m.

In the first embodiment, the fire extinguishing control panel 13 keeps the control valve 12 open at all times, and receives the running water detection signal E1 from the running water detection switch 11 provided in the running water detection device 10. According to the alarm of the fire detector 14 provided in the corresponding monitoring area, the control valve 12 is kept open when there is a fire detection signal E2 from the fire receiving panel 16, and when there is no fire detection signal E2. The control valve 12 is controlled to close.

Then, when there is a fire detection signal E2 thereafter, the control valve 12 which has been once closed is controlled to be opened, and water is discharged from the sprinkler head 1 in which fire-extinguishing water has been operated to perform fire suppression control. This activated sprinkler head 1
The fire extinguishing control panel 13 scatters the fire detector 2
When the fire alarm status of 0 is monitored and fire is determined from the non-alarm status of the flame detector 20, the control valve 12 is closed to stop water sprinkling from the sprinkler head 1.

Here, as an example of the flame detector 20, a fire detector that holds a warning state when a fire is detected and thermal radiation energy from the heat of a fire source is detected and fired is taken as an example. When the flame detector 20 issues an alarm, the panel 13 sends a restoration signal every predetermined time, for example, 20 seconds after the alarm is issued, to restore the flame detector 20, and after the restoration, the flame detector 20 fires again. It monitors whether the detection signal E3 is received.

If the fire detection signal E3 is not received within a predetermined time after the flame detector 20 is restored, the fire extinguishing control panel 13 will respond Determines that the fire has been extinguished, and the control valve 12
Of the sprinkler head 1
Stop watering fire extinguishing water from.

When the flame detector 20 is in a non-reporting state, the fire extinguishing control panel 13 determines that the fire has been extinguished and the control valve 12 is closed, and then the flame detector 20 detects a flame again and issues a report. , The control valve 12 is opened and watering from the operating sprinkler head 1 is started again.

After achieving the watering condition once,
Regardless of the alarm signal from the fire detector 14, the flame detector 20
The reason why the control valve 12 is controlled to perform watering and stoppage based on the judgment signal based on the alarm signal from the fire detector is that the function of the normal fire detector 14 using the heat detector and the smoke detector is lost due to the fire. This is because there is a risk of fire and it is difficult to detect a fire suppression state.

That is, the reason why the fire sensor is judged to be fire extinguishing instead of the conventionally installed fire sensor such as a heat sensor or a smoke sensor is as follows. (1) After the occurrence of a fire, since the monitoring area is full of smoke, the smoke detector always issues an alarm and cannot detect fire suppression. (2) If the smoke exhaust system in the monitoring area is activated,
As heat and smoke travel to the smoke evacuator, heat and smoke detectors cannot detect them accurately. (3) Since the heat and smoke detectors installed in the monitoring area are sparsely installed, there is a doubt about the accuracy of fire suppression detection. (4) Heat transfer to the sensor side is poor due to the influence of water spray, so that the sensitivity of the heat sensor is low.

Therefore, in the present invention, the use of the flame detector does not have the above-mentioned disadvantages, and since the fire extinguishing is determined from the non-reporting state of the flame detector, watering is stopped.
This is because it is possible to accurately stop watering.

The fire extinguishing control by the fire extinguishing control panel 13 includes a running water detection signal E1 from the running water detection switch 11 provided in the running water detection device 10 and a fire detection signal E2 from the fire receiving board 16 based on the alarm of the fire detector 14. Is based on
The processing operation differs between the case where the sprinkler head 1 is operated first and the running water detection signal E1 is obtained, and the case where the fire detector 14 issues an alarm and the fire detection signal E2 is obtained first. The processing operation will be described with reference to FIGS.

FIG. 2 shows a processing operation in the case where the fire detector 14 issues a warning first and then the sprinkler head 1 operates.

First, in the steady monitoring state, step S
The control valve 12 is controlled to be opened by the initial setting as shown in FIG. In this state, step S2
A fire occurs in the protective compartment of the closed type sprinkler head 1 as shown in FIG.
Suppose that 4 has issued the alert.

An alarm signal from the fire detector 14 is received by the fire receiving panel 16, and when a fire is determined, a fire detection signal E 2 is output to the fire extinguishing control panel 13. Fire extinguishing control panel 13
When the fire detection signal E2 is received from the fire receiving panel 16, the control valve 12 is kept open as in step S4.

Subsequently, as in step S5, following the alarm from the fire detector 14, the closed sprinkler head 1 is operated by receiving a hot air flow due to the fire. At this time, since the pressurized fire extinguishing water has reached the sprinkler head 1, water is sprinkled immediately by the operation of the sprinkler head 1.

When the sprinkler head 1 is operated, the fire extinguishing water flows through the branch pipe 2, the running water detection device 10 is operated to turn on the running water detection switch 11, and sends the running water detection signal E1 to the fire extinguishing control panel 13. When the fire extinguishing control panel 13 receives the running water detection signal E1, the fire extinguishing control panel 13 sends the fire detection signal E2 generated by the fire detector 14 already activated in step S3 to the fire receiving panel 1
6, the open state of the control valve 12 is maintained as in step S7.

On the other hand, when the pump control panel 8 detects that the pressure switch 7 of the pressure tank 6 is turned on, the pump control panel 8 controls the start of the motor 9 and operates the fire extinguishing pump 4 as in step S8. Continually spray fire water to extinguish the fire.

During the fire extinguishing by spraying the fire extinguishing water from the activated sprinkler head, step S9 is performed.
When the flame detector 20 detects a fire and issues an alarm as described above, a recovery instruction is issued every elapse of a predetermined time, for example, 20 seconds after the alarm is issued, and the alarmed flame detector 20 is restored.

When the flame detector 20 recovers, the state of the flame detector 20 is monitored in the next step S10.
If the flame detector 20 is not operated as in 11, it is determined that the fire has been extinguished when the non-operated state continues for a predetermined time after recovery, and the control of the control valve 12 is controlled in step S12. As in S13, watering from the activated sprinkler head is stopped.

As described above, according to the present invention, the fire extinguishing is determined based on the non-alarm state of the flame detector 20 during the water sprinkling from the activated sprinkler head, and the water sprinkling is stopped. Therefore, the fire extinguishing can be accurately determined. In addition, it is possible to further reduce damage caused by water damage caused by continuing watering after the fire is extinguished.

After stopping watering in step S13,
The condition of the flame detector 20 is monitored, and if the flame is detected and the alarm is issued after the watering is stopped, the control valve 12 is controlled to open again to start the watering again, whereby the fire can be surely extinguished. .

FIG. 3 shows a processing operation by the fire extinguishing control panel 13 when the sprinkler head 1 is first activated by a fire and then the fire detector 14 is activated.

First, in the steady monitoring state, step S
The control valve 12 maintains the open state as shown in FIG. 1. In this state, a fire occurs as shown in step S2, and the heat due to the fire causes the closed sprinkler head 1 to operate first in step S3. I do.

For this reason, the running water detection device 10 is operated and the running water detection switch 11 is turned on to output the running water detection signal E1 to the fire extinguishing control panel 13 as in step S4. At this time, the fire detector 14 is not informed as in step S5, and the fire detection signal E2 from the fire receiving panel 16 is not obtained.

Then, the fire extinguishing control panel 13 sends the running water detection signal E
If the fire detection signal E2 is not obtained and the fire detection signal E2 is not obtained, it is considered that there is a possibility of the malfunction of the closed sprinkler head 1 and the control of the control valve 12 is controlled in step S6.
Thereafter, the fire detection signal E2 generated by the fire detector 14 is issued.
Is obtained, the control valve 12 is closed.

At this time, since a fire has actually occurred, step S is performed during or after the closing control of the control valve 12.
As shown in FIG. 7, the fire detector 4 issues an alarm, and a fire detection signal E2 is obtained from the fire receiving panel 16. When the fire detection signal E2 is obtained, the fire extinguishing control panel 13 again controls the control valve 12 that has been closed and controlled as in step S8.

On the other hand, the pump control panel 8 starts the operation of the fire extinguishing pump 4 by driving the motor 9 at the time when the pressure switch 7 is turned on, and supplies the pressurized fire extinguishing water by the pump operation as shown in step S9. Head 1
Fire is extinguished by continuous watering from.

The fire extinguishing control in steps S10 to S14 after the continuous spraying of the fire extinguishing water from the sprinkler head operated by the pump operation in step S9 is the same as steps S9 to S13 in FIG. That is,
Flame detector 20 using radiant energy from heat or flame of fire
Is issued, a recovery instruction is issued, for example, 20 seconds after the alarm is issued, and restoration is performed. If the flame detector 20 is re-issued after the recovery, the restoration instruction is repeated every 20 seconds, and the restoration instruction is issued, and the recovery is performed. If the alarm is not generated continuously for a predetermined time, it is determined that the fire has been extinguished.
Stop watering from the activated sprinkler head.

FIG. 4 is a flowchart of a control process realized by program control of an MPU or the like provided on the fire extinguishing control panel 13 for realizing the processing operations of FIGS.

In FIG. 4, first, an initial setting is performed in step S1. This initial setting is performed at the time of start-up for starting operation of the fire extinguishing equipment, or at the time of restarting operation after finishing the equipment test, and the control valve 12 is controlled to be open by the initial setting.

When the initial setting in step S1 is completed, a steady monitoring state is entered. In step S2, the fire extinguishing control panel 16 checks the presence or absence of the flowing water detection signal E1. From
Proceeding to step S13, the presence or absence of the fire detection signal E2 is checked. In the steady monitoring state, since there is no fire detection signal E2, the process returns to step S2 again, and steps S2 and S2 are performed.
Thirteen processes are repeated.

In such a steady monitoring state, when the sprinkler head 1 is activated by the fire, the flowing water detecting device 10 is activated by the flowing water, and the flowing water detecting signal E1 is obtained by turning on the flowing water detecting switch 11, the flow proceeds to step S.
In step 2, it is determined that running water has been detected, and the flow advances to step S3 to check for the presence of a fire detection signal E2.

At this time, if there is no fire detection signal E2, the process proceeds to step S4, and the control of closing the control valve 12 is performed. When the control of closing the control valve 12 is completed, the presence or absence of the fire detection signal E2 is checked in step S5, and if there is the fire detection signal E2, the control valve 12 is opened in step S6. On the other hand, if the fire detection signal E2 is obtained in step S3, the process proceeds to step S3.
4 to S6 are skipped.

During the operation of the fire pump 4 by driving the motor 9 of the pump control panel 8 by detecting the ON of the pressure switch 7, the flame detector 20 which is notified by receiving light from the fire flame in step S 7. , A recovery instruction is issued to the flame detector 20 every 20 seconds, for example.

When a recovery instruction is issued to the flame detector 20 in step S7, a timer is started in step S8, and in step S9, it is checked whether or not the flame detector 20 returns again after recovery. If the flame detector 20 reports again, step S
6, the control valve 12 is kept open.

If there is no alarm from the flame detector 20 in step S9, it is checked whether the timer has expired in step S10. When the fire is up, it is determined that the fire has been extinguished, the process proceeds to step S11, the control valve 12 is controlled to close, and watering from the activated sprinkler head 1 is stopped.

After the watering is stopped, the alarm of the flame detector 20 is monitored in step S12.
Returns to step S6, the control valve 12 is controlled to open, and water is sprayed again from the activated sprinkler head.

Here, in the fire extinguishing control processing of steps S7 to S12 in FIG. 4, if there is no alarm for a predetermined time determined by the timer after the flame detector 20 is restored, the control is performed. Although the watering is stopped by controlling the closing of the valve 12, and then the alarm of the flame detector 20 is monitored, the fire may be monitored by the flame detector 20 even during the closing control of the control valve 12. Good.

That is, if the flame remains without being completely extinguished by water spray and the light from the flame is impeded by water spray and cannot be detected by the flame detector 20, the control valve 12
When the amount of water spray is reduced by the close control, the flame detector 20 may detect light from the flame and issue an alarm on the way.

Therefore, if the flame detector 20 issues an alarm in the process of squeezing water by closing control for stopping watering, it is immediately judged that a fire has occurred and the process returns to step S6, and the control valve is closed during the closing control. It is desirable to switch 12 to open control and restart watering. Therefore, step S12 in FIG.
The return of the process when there is no alarm from the flame detector may be a process as indicated by a broken line so as to return to step S11.

Steps S11 and S12 as shown by the broken lines
During the process of steps S7 to S10, the non-reporting state of the flame detector 20 continues for a predetermined period of time and it is determined that the fire has been extinguished, and the control of closing the control valve 12 is being performed. When the flame detector 20 detects the light of the flame hindered by the above and issues a warning again, the control valve 12
Can be switched from the closing control to the opening control to quickly return to the sprinkling state.

Here, in the embodiment shown in FIG. 1, the fire detector 20 holds the alarm state when light from a flame due to a fire is detected, and is restored by a restoration instruction from the fire extinguishing control panel 13. I used a flame detector of the type
In another embodiment, for example, the flame detector 20 itself has a timer. When the flame detector 20 detects light from the flame due to a fire and sends out an alarm signal to the fire extinguishing control panel 13 side, the flame detector itself becomes a predetermined timer. A self-healing type flame detector 20 that performs self-healing after a time may be used.

FIG. 5 is a time chart of the processing operation of the self-restoring type flame detector 20. The self-restoring type flame detector 20 first monitors the light from the flame due to the fire in step S1, and when detecting the fire by detecting the light from the flame in step S2, holds the fire detection state in step S3. Then, a fire signal (alarm signal) is transmitted to the fire receiving panel 16 in step S4.

Subsequently, the timer is started in step S5, and the time-out of the timer started in step S6 is monitored.
At 7, self-restoration, that is, restoration of the monitoring circuit is performed.

By using the self-restoring type flame detector 20 performing the processing operation as shown in FIG. 5, step S in the fire extinguishing control panel 13 shown in the flowchart of FIG.
Steps S7, S8 and S10 become unnecessary.

In this case, the process of judging the alarm of the flame detector 20 in the step S9 remains. However, by giving the accumulation function to the alarm judgment of the flame detector 20, the flame detector 20 side When the self-recovery has been performed and the alarm has not been issued for a predetermined period of time, it can be determined that the fire has been extinguished and watering can be stopped.

The flame detector 2 used in the embodiment of FIG.
As 0, an analog type flame sensor that sends out analog data according to the intensity of radiant energy from a fire may be used. In the case of this analog type flame sensor 20, a fire judgment threshold value and a fire suppression judgment threshold value are set in the sensor in advance, and the threshold value is compared with the analog data to send a signal to the fire suppression control panel 13 side. .

Further, the flame detector 20 may be configured to generate a pulse when receiving radiant energy from a fire, and may be configured to determine a fire based on the number of generated pulses. In such a case, it is possible to judge whether a fire has occurred or to extinguish a fire based on the number of pulses.

Further, the flame detector 20 may be of any sensor or circuit configuration as long as it can detect infrared rays and ultraviolet rays from the flame, and the structure is not particularly limited. If so, it is desirable in that it is less susceptible to smoke from fire, and more accurate watering control can be performed.

In the embodiment shown in FIG. 1, the flame detector 20 is connected to a dedicated line drawn from the fire suppression control panel 13, but the flame detector 20 is connected to a signal line on the fire alarm system side. May be. In this case, a flame detector 20 is connected to the transmission line of the fire alarm system via a repeater, and the fire suppression control panel 13 is connected to a fire detector 14 using a heat detector, a smoke detector, and the like from the fire receiving panel 16. Upon receiving the alarm information and the alarm information from the flame detector 20, the control valve 12 is controlled.

In the fire alarm system, a unique address is set for each terminal such as the fire detector 14 and the like, and the fire receiver 1
An R-type system that monitors the status of each terminal by a call by designating an address from 6 or a P-type system in which a dedicated line is arranged for each monitoring area may be used. In the case of a P-type system, the flame detector 2 is used to distinguish the operation of the fire detector 20 from the operation of the fire detector 14 such as a heat detector or a smoke detector.
It is necessary to lay a dedicated signal line or generate a unique signal from the flame detector.

When the fire extinguishing system of the present invention is installed in a condominium, a fire receiving panel 16 is provided for each dwelling unit. And fire extinguishing control by opening and closing the control valve 12 may be performed for each dwelling unit. Further, the control valve 12
In the embodiment of FIG. 1, the motor-operated valve is taken as an example, but any other valve having a valve function, such as an electromagnetic valve or a valve integrated with the flowing water detecting device 10, may be used. Good.

Next, a second embodiment of the fire extinguishing system according to the present invention will be described. The fire extinguishing equipment of the second embodiment has the same equipment configuration as that of FIG. 1, but differs in that the control valve 12 is always closed in a steady monitoring state. Therefore, the fire extinguishing control panel 13 closes the control valve 12 in a steady monitoring state,
The fire detector 14 monitors the fire detection signal E2 from the fire receiving panel 16 based on the alarm of the fire detector 14, and when the fire detection signal E2 is received, controls the control valve 12 in the monitoring area corresponding to the installation location of the fire detector 14 to open. Then, the fire extinguishing water is filled up to the closed type sprinkler head 1.

After that, when a specific sprinkler head 1 is operated by receiving heat from a fire, fire extinguishing water is sprinkled from the activated sprinkler head 1. As described above, even in the second embodiment in which the control valve 12 is always closed in the steady monitoring state, after the water sprinkling from the activated sprinkler head 1 is started, the control valve 12 is controlled by the state of the flame detector 20. Control the start and stop of watering.

That is, when the flame detector 20 issues an alert during watering,
For example, every 20 seconds after the alarm is issued, the fire extinguishing control panel 13 issues a recovery instruction. If the fire alarm is not generated for a predetermined time after the recovery instruction, it is determined that the fire has been extinguished, and the control valve 12 is closed. Control and stop watering.

The fire extinguishing control panel 13 in the second embodiment
The control operation according to the above will be described below separately for the case where the fire detector 14 is activated first and the case where the sprinkler head is activated first.

FIG. 6 shows a processing operation in the case where the fire detector 14 first issues a warning due to a fire in the second embodiment, and thereafter the sprinkler head 1 is operated. First, in the steady monitoring state, the control valve 12 is closed as in step S1. In this state, a fire occurs as in step S2, and in step S3, when the fire detector 14 using the heat detector or the smoke detector first issues a fire, the fire receiving panel 16 determines the fire from the fire signal. And outputs a fire detection signal E2 to the fire suppression control panel 13.

Upon receiving the fire detection signal E2, the fire extinguishing control panel 13 controls the control valve 12 to open in step S4, so that pressurized fire extinguishing water is supplied to the branch pipe 2 on the sprinkler head 1 side.
Is added to Then, receiving heat from the fire, step S
When the sprinkler head 1 is actuated at 5, the pump control panel 8 detects that the pressure switch 7 is turned on, drives the fire extinguishing pump 4 by driving the motor 9, and continuously supplies pressurized fire extinguishing water to operate the sprinkler head 1. Fire extinguishing by sprinkling water from.

FIG. 7 shows a processing operation in the case where the sprinkler head operates first due to a fire and then the fire detector issues a warning in the second embodiment. In the steady monitoring state, the fire extinguishing control panel 13 keeps the control valve 12 closed as in step S1. In this state, it is assumed that a fire occurs as in step S2 and the sprinkler head operates first as in step S3.

At this time, since the control valve 12 is in the closed state, the water for fire extinguishing is not sprayed. Then, step S4
When the fire detector 14 using a heat detector or a smoke detector issues a notification and the fire detection signal E2 is output from the fire receiving panel 16, the fire extinguishing control panel 13 controls the control valve 12 to open in step S5. .

For this reason, the fire extinguishing water is sprinkled from the sprinkler head 1 already operating through the branch pipe 2, and the pump control panel 8 operates the motor 9 in step S6 when the pressure switch 7 is turned on when the fire extinguishing water is sprayed. Then, water is sprinkled by the continuous supply of fire-extinguishing water from the activated sprinkler head to start fire extinguishing.

Monitoring of extinguishing by the flame detector 20 during sprinkling of fire extinguishing water and steps S7 to 7 when judging to extinguish fire
The fire suppression control in S11 is the same as in steps S7 to S11 in FIG.

FIG. 8 shows a second example for performing the processing operations of FIGS. 6 and 7.
It is a flow chart of processing operation of fire extinguishing control board 13 of an embodiment. In the processing operation of the fire extinguishing control panel 13 of the second embodiment, first, initial setting is performed in step S1, and the control valve 12 is closed. After the initial setting of the control valve 12 to be in the closed state, the reception of the fire alarm of the fire detector 14 using the heat detector and the smoke detector is checked in step S2. Then, the control valve 12 is controlled to open.

In the case of sprinkler water sprinkling from the sprinkler head operated by the fire after the control valve 12 is opened, a recovery instruction is issued to the flame detector 20 every 20 seconds, for example, in step S4. . When a recovery instruction is issued in step S4, a timer is started in step S5,
If there is no alarm from the flame detector 20 in step S6, it is checked in step S7 whether the timer has expired.

If there is an alarm from the flame detector 20 in step S6 before the timer expires in step S7, the flow returns to step S4 to issue the next restoration instruction. If the flame detector does not issue an alarm in step S6, and if the timer times out in step S7 in this state,
If there is no alarm from the flame detector 20 for a certain period of time determined by the timer after the flame detector 20 is restored in step 4, it is determined that the fire has been extinguished, and the closing control of the control valve 12 is performed in step S8. Then, stop spraying fire extinguishing water from the activated sprinkler head.

After the watering is stopped, the alarm of the flame detector 20 is monitored in step S9. If the alarm is issued after the watering is stopped, the flow returns to step S3 to open the control valve 12 again. Control and resume watering of firefighting water.

Even in the process of FIG. 8, step S9
By returning the processing in the case where there is no alarm from the flame detector 20 to the control valve closing control in step S8 as shown by the broken line,
During the closing control of the control valve 12 when it is determined that the fire has been extinguished by the processing of this broken line, the presence or absence of an alarm of the flame detector 20 is monitored. Even immediately, the control valve 12 can be returned to step S3 to open the control valve, and even if it is determined that the fire is to be extinguished, the water sprinkling can be promptly performed again in the case where it is erroneously determined to be the extinguishing due to the interruption of the flame light by the water spray. It can be carried out.

FIG. 9 shows a third embodiment of the present invention, which is characterized in that the present invention is applied to a fire extinguishing system of a pre-operation type.

In FIG. 9, in the third embodiment, a pre-operation type running water detecting device 21 is provided on a branch pipe 2 drawn from a water supply main pipe 3 to a monitoring area. The pre-operation type water flow detection device 21 is provided with a pre-operation valve 22 on the side of the water supply main pipe 3, a check valve 23 on the secondary side of the pre-operation valve 22, and a monitoring area from the check valve 23 via the gate valve 30. Are connected.

The pre-actuating valve 22 has a primary chamber 24 connected to the water supply main pipe 3 side, and a clapper 25 as a valve body is provided at the opening of the primary chamber 24 so that the opening of the primary chamber 24 is closed. By closing, the space between the secondary side chamber 27 is separated. A priming chamber 26 is formed behind the clapper 25, and the priming chamber 2
The clapper 25 is pressed in the closing direction by the spring 28 housed in the housing 6.

The primary side chamber 24 is filled with pressurized fire extinguishing water, the priming chamber 26 is also filled with pressurized fire extinguishing water of the same pressure, and pressurized fire extinguishing water of the same pressure is added before and after the clapper 25. The clapper 25 has a difference in front and rear area, that is, the primary side chamber 24.
Is maintained in a closed state by the difference in area between the priming chamber 26 and the force of the spring 28.

The check valve 23 provided on the secondary side of the pre-operation valve 22 has a clapper 29 as a valve body. An air pipe 32 for supplying compressed air is connected to the secondary side of the clapper 29 of the check valve 23. Therefore, the secondary side of the check valve 23 and the branch pipe 2 are filled with compressed air. Since the primary side, that is, the secondary side chamber 27 of the pre-actuation valve 22 is at atmospheric pressure, the clapper 29 is kept closed by receiving the force of the secondary side compressed air.

The air pipe 32 is provided with a control valve 33, a flow control valve 34 with an orifice mechanism, and a check valve 35. Normally, the flow control valve 34 is controlled to be closed, but a small hole having a diameter of about 2 mm is formed in the valve body, and compressed air is supplied from this hole. At the time of restoration, the flow control valve 34
, The compressed air is quickly supplied from the check valve 23 to the branch pipe 2 side. A drain valve 36 is connected to the secondary side of the check valve 23, and a pressure gauge 37 is connected to a connection portion of the drain valve 36.
Is provided.

For the priming chamber 26 of the pre-actuation valve 22,
A priming pipe 38 is connected. The priming pipe 38 is
One end is connected to the priming chamber 26, and the other end is connected to a primary pipe for the primary chamber 24. For this reason, the pressurized fire extinguishing water in the primary side pipe is supplied to the priming chamber 26 through the priming valve 39, the check valve 40 and the orifice 41 of the priming pipe 38.

The starting pipe 42 is connected to the priming chamber 26 side of the priming pipe 38. The starting pipe 42 is provided with a pilot control valve 43 that opens and closes in response to a control signal from the fire suppression control panel 13, and a secondary side of the pilot control valve 43 is connected to a drain pipe. A manual release valve 44 is provided in parallel with the pilot control valve 43 of the starting pipe 42.

The opening degree of the orifice 41 provided in the priming pipe 38 is discharged from the starting pipe 42 when the control valve 43 is opened, rather than the inflow of pressurized fire extinguishing water from the priming pipe 38 into the priming chamber 26. The priming chamber 26 is set to have a large drainage amount. Therefore, when the control valve 43 is controlled to open, the pressure in the priming chamber 26 decreases, the pressure of the pressurized fire-extinguishing water in the primary chamber 24 exceeds the force of the spring 28, and the clapper 25 opens.

When the pilot control valve 43 is controlled to be closed, pressurized fire-extinguishing water is gradually supplied to the priming chamber 26 through the priming valve 39, the check valve 40, and the orifice 41 of the priming pipe 38 to accumulate the pressure. With the same pressure as the pressurized fire-extinguishing water in the secondary chamber 24, the clapper 25 is actuated by the difference between the front and rear areas of the clapper 25 and the force of the spring 28, and
The opening of the secondary chamber 24 is slowly closed.

Further, from the secondary chamber 27 of the pre-actuation valve 22,
The running water detection pipe 45 is drawn out as shown on the lower side. An auxiliary drain valve 46 is connected to the flowing water detection pipe 45,
Further, a check valve 47 and an orifice 49 are provided, and the secondary side of the orifice 49 is opened to the atmosphere to be able to drain.

On the primary side of the orifice 49, a running water detection switch 48 using a pressure switch is provided. The running water detection switch 48 is turned on when the pressure of the pressurized fire-extinguishing water flowing into the running water detection pipe 45 from the secondary chamber 27 reaches a predetermined pressure when the clapper 25 of the pre-actuation valve 22 is opened, and outputs the running water detection signal E1. Output to the fire suppression control panel 13.

The orifice 49 narrows the flow path so that the flowing water detection switch 48 is turned on instantly when the clapper 25 is opened, and provides an opening that gives a sufficient drainage amount to be turned off instantly when the clapper 25 is closed. Set to degree.

A test pipe 50 is connected to the flowing water detection pipe 45 between the check valve 47 and the orifice 49 from the priming pipe 38, and the test pipe 50 is provided with a test valve 51. By opening the test valve 51, the pressurized fire extinguishing water on the primary side is directly supplied to the secondary side of the check valve 47 of the flowing water detection pipe 45 so that the flowing water detection switch 48 can be tested.

Further, in the embodiment shown in FIG. 9, a fire detector 14 such as a smoke detector or a heat detector is arranged in a guard area where the closed type sprinkler head 1 is installed, and It is connected to the detector line from the fire receiving panel 16. Further, a flame detector 20 is installed in a guard area where the sprinkler head 1 is installed. In this embodiment, the flame detector 20 is connected by a dedicated line from the fire extinguishing control panel 13.

Next, the fire extinguishing control of the embodiment shown in FIG. 9 will be described. When a fire occurs in the alert area and the fire detector 14 using the heat detector or the smoke detector gives an alarm, the fire receiver 16
Detects a fire and sends a fire detection signal E to the fire suppression control panel 13.
2 is output. Upon receiving the fire detection signal E2, the fire extinguishing control panel 13 operates the pre-operation type running water detecting device 21 in the corresponding guard area.
The opening control of the pilot control valve 43 provided in the controller is performed.

When the pilot control valve 43 is controlled to open, the pressure in the priming chamber 26 of the pre-actuating valve 22 disappears and is pushed by the pressurized fire extinguishing water in the primary chamber 24 to open the clapper 25, and the secondary chamber 27 is opened. The water for pressurized fire extinguishing is full. At this time, pressurized fire extinguishing water is also supplied to the flowing water detection pipe 45, and the flowing water detection switch 48 is turned on, and the pre-activation valve 2 is
2 is displayed.

Thereafter, when the sprinkler head 1 is operated by receiving heat from the fire, the pressurized air filled in the branch pipe 2 is discharged, whereby the clapper 2 of the check valve 23 is discharged.
At this time, since the pre-actuating valve 22 is already open, the pressurized fire extinguishing water is supplied from the secondary side chamber 27 to the branch pipe 2 through the check valve 23, and the sprinkler head 1 is operated. Spray fire water to extinguish the fire.

During the fire extinguishing due to water spray from the activated sprinkler head 1, the fire extinguishing control panel 13 monitors the state of the flame detector 20. In other words, the fire extinguishing control panel 13 issues a recovery instruction every 20 seconds, for example, in response to the alarm from the flame detector 20, and determines that the fire has been extinguished if the alarm has not been emitted for a predetermined time after the recovery instruction. Then, the pilot control valve 43 is controlled to close.

When the pilot control valve 43 is controlled to be closed, the drainage of the pre-actuating valve 22 from the priming chamber 26 is stopped, and primary pressurized fire extinguishing water is supplied from the priming pipe 38 to the priming chamber 26, so that the clapper Reference numeral 25 slowly closes the opening of the primary chamber 24, and stops watering from the sprinkler head that has been activated when the pre-operation valve 22 is closed.

When the flame detector 20 issues a warning again after or during the closing control of the pre-operation valve 22, the fire extinguishing control panel 13 controls the control valve 43 to open, and the pre-operation valve 22 opens again. Fire extinguishing water is sprinkled again from the activated sprinkler head 1.

FIG. 10 shows a fourth embodiment of the present invention. The sprinkler head in the fire extinguishing system of the first embodiment shown in FIG. 1 is of a closed type, whereas the sprinkler of this fourth embodiment is of an open type. It is characterized by using the head 1a.

In the fourth embodiment shown in FIG. 10, since the open sprinkler head 1a is provided in the branch pipe 2, the fire extinguishing control panel 13 keeps the control valve 12 closed in the steady monitoring state.

For this reason, in the fire suppression control panel 13, a fire detector 14 using a heat detector or a smoke detector gives an alarm due to a fire, and the fire receiving panel 16 outputs a fire detection signal E2 based on the fire notification. Then, the control valve 12 is immediately opened and the fire is extinguished by spraying fire extinguishing water from the open type sprinkler head 1a.

The fire suppression during sprinkling from the open type sprinkler head 1a is monitored by monitoring the state of the flame detector 20 by the fire extinguishing control panel 13, which is the same as the embodiment of FIG. That is, the fire extinguishing control panel 13 outputs a recovery signal, for example, every 20 seconds in response to the alarm of the flame detector 20 to perform the recovery operation. If the alarm is not generated for a predetermined time after the recovery, the fire is extinguished. Then, the control valve 12 is controlled to close to stop watering.

In the above embodiment, the case where one flame detector 20 is installed in the monitoring area is taken as an example. However, in order to eliminate blind spots, two or more flame detectors are connected to both ends of the monitoring area. It is good to install so that it is located in.

Further, in the above-described embodiment, the fire detector is restored immediately after the fire detector or the flame detector detects the fire or immediately after the start of watering by receiving the flowing water detection signal, and the fire suppression is determined. After elapse of a predetermined accumulation time from the start of water spraying, a fire extinguishing determination may be made based on a flame sensor recovery instruction.

As described above, after the accumulation time is set and watering is started, watering for a predetermined time is ensured, so that the reliability of fire extinguishing can be ensured. As the watering time of the predetermined time, it is preferable to set a watering time effective for fire extinguishing obtained in advance by a fire extinguishing experiment or the like. Specifically, before the step S7 in the flowchart of FIG. 4, and in step S5 in the flowchart of FIG.
Set the accumulation time before. In the embodiments of FIGS. 9 and 10, an accumulation time can be provided.

The present invention is not limited to the above embodiments, but includes appropriate modifications without impairing the objects and advantages.

[0138]

As described above, according to the present invention, since the fire extinguishing is judged based on the state of the flame detector and the spraying is stopped, the fire extinguishing is accurately grasped and the spraying is ensured. Can be stopped at the same time, and the damage caused by water damage can be further suppressed.

[0139] Further, after the first watering starts, since watering is started and stopped in a monitoring state of the flame sensor, heat and smoke due to a fire, and even a normal heat sensor and a smoke sensor due to watering can accurately detect a fire. Even if the situation cannot be detected, accurate and prompt fire extinguishing control can be performed based on the monitoring state of the flame detector.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a first embodiment of the present invention in which a control valve is always opened.

FIG. 2 is a flowchart of a processing operation in a case where a fire detector gives an alarm first due to a fire in FIG. 1;

FIG. 3 is a flowchart of a processing operation in a case where the sprinkler head is operated first due to a fire in FIG. 1;

FIG. 4 is a flowchart of the fire extinguishing control of FIG. 1;

FIG. 5 is a flowchart of a processing operation of a flame detector having an automatic recovery function.

FIG. 6 is a flowchart of a processing operation in a case where a fire detector gives an alarm first due to a fire in a second embodiment of the present invention in which a control valve is always closed.

FIG. 7 is a flowchart of a processing operation when a sprinkler head is operated first due to a fire in a second embodiment of the present invention in which a control valve is always closed.

FIG. 8 is a flowchart of a fire extinguishing control according to a second embodiment of the present invention in which a control valve is always closed.

FIG. 9 is an explanatory view of a third embodiment of the present invention using a pre-actuated running water detection device.

FIG. 10 is an explanatory view of a fourth embodiment of the present invention using an open type sprinkler head.

FIG. 11 is an explanatory view of a conventional fire extinguishing system.

[Explanation of symbols]

 1: Closed type sprinkler head 1a: Open type sprinkler head 2: Branch pipe 3: Water supply main pipe 4: Fire pump 5: Water storage tank 6: Pressure tank 7: Pressure switch 8: Pump control panel 9: Motor 10: Flowing water detection device 11, 48: running water detection switch 12: control valve 13: fire extinguishing control panel 14: fire detector (heat or smoke detector) 15: repeater 16: fire receiving panel 20: flame detector 21: pre-operation type running water detector 22: Pre-actuation valve 23: Check valve 43: Pilot control valve

Claims (9)

[Claims] 1. A fire extinguishing system for spraying fire-extinguishing water from a fire extinguishing head connected to a branch pipe branched from a water supply main pipe in the event of a fire. A fire detector, which is installed in the monitoring area and detects radiant energy from a flame associated with a fire or heat from a fire source; and a fire extinguishing water provided to the water supply main side of the fire extinguishing head. A control valve for supplying and stopping water, and when a fire is detected by the fire sensor, water for fire extinguishing water can be sprinkled from the fire extinguishing head. And a control unit for controlling the opening and closing of the control valve. 2. The fire extinguishing equipment according to claim 1, wherein the control unit makes a fire extinguishing judgment by the flame detector after watering from the fire extinguishing head is started for a predetermined time. 3. The fire extinguishing system according to claim 1, wherein the control unit controls the control valve in accordance with a fire detection state of the flame sensor after watering is stopped by the flame sensor. Fire extinguishing equipment. 4. The fire extinguishing system according to claim 1, wherein the control unit determines that the fire has been extinguished if the fire detection signal from the flame detector has not been received even after a predetermined time has elapsed. Fire extinguishing equipment. 5. The fire extinguishing system according to claim 1, wherein the control unit monitors an analog level corresponding to the level of the flame output from the flame sensor, and when the analog level falls below a predetermined level, the fire is extinguished. Fire extinguishing equipment characterized by judgment. 6. The fire extinguishing system according to claim 1, wherein said flame detector detects a fire and automatically recovers after transmitting a fire detection signal. 7. The fire extinguisher according to claim 1, wherein the fire extinguishing head is a closed type, the control valve is always open, the branch pipe is provided with a flowing water detecting device, and the control unit is If a fire detection signal is received from a fire detector in the corresponding monitored area when a detection signal is received from the running water detection device accompanying the operation of the fire extinguishing head, the control valve is kept open and there is no fire detection signal A fire extinguishing system characterized by controlling the closing of a control valve in some cases. 8. The fire extinguishing system according to claim 1, wherein the control valve is always closed, and the control unit receives a fire detection signal from a fire detector and controls the corresponding control area of the guard area. Fire extinguishing equipment characterized by controlling opening of fire. 9. The fire extinguishing system according to claim 1, wherein the control valve is a pilot control valve for opening and closing a pre-actuated valve provided in a branch pipe, and the control unit is configured to perform the fire detection signal and the flame detection signal in response to a fire detection signal and a flame detection signal. Fire extinguishing equipment characterized by opening and closing a pilot control valve.