JP2015058231A - Fire-fighting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a function of fire-fighting equipment continuously as much as possible, and cope with a fire that occurs after an earthquake even when damage to cause water leakage is received by an occurrence of the earthquake.SOLUTION: A closed type sprinkler head 26 is connected to secondary side piping of a water flow detector 24, and primary side piping from a fire pump 10 to the water flow detector 24, and the secondary side piping are filled with pressurized water. When a control part 44 of a pump control board 14 receives an earthquake detection signal E2 or E4 from a seismoscope 40 or a reception device 42, it does not start the fire pump 10 even when a pressure drop signal E1 is received from a pressure switch 20, and it starts the fire pump 10 when a fire signal E3 by the actuation of a fire sensor 36 installed in a protection zone is received.

Description

The present invention relates to a fire extinguishing facility that activates a fire pump to discharge water from a sprinkler head when a fire occurs.

  Conventionally, wet sprinkler fire extinguishing equipment is known as fire extinguishing equipment for general buildings. The wet sprinkler fire extinguishing equipment is a fire extinguishing equipment that automatically performs everything from fire detection to fire extinguishing for the purpose of initial fire extinguishing with water. Wet sprinkler fire extinguishing equipment for general buildings uses a closed sprinkler head, and all pipes are filled with pressurized water. In the event of a fire, the sprinkler head automatically activates and opens the water flow detector, 80 Fire extinguisher by continuously sprinkling over a liter of water.

  Moreover, dry sprinkler fire extinguishing equipment is known for cold districts in which the secondary side piping of the running water detector is filled with compressed air to prevent freezing.

  In such a sprinkler fire extinguishing system, when a closed sprinkler head is activated in response to a thermal air current from a fire, the pressure of pressurized water filled in the pipe from the fire extinguishing pump decreases due to water discharge from the sprinkler head. This pressure drop is detected by the pressure switch provided in the pressure tank to which the pressurized water in the main water supply pipe is introduced, the pressure drop detection signal is output to the pump control panel, the fire extinguishing pump is started, and the pressurized water is supplied to the sprinkler head. The water can be continuously discharged.

  The activation of the fire pump when the sprinkler head is activated by such a fire is the same as in the pre-actuated sprinkler fire extinguishing equipment.

  The closed type sprinkler head installed in the sprinkler fire extinguishing equipment is opened by receiving a hot air current from the fire, but if it is damaged when a strong earthquake occurs and a strong impact is applied, it will open and leak water. An accident occurs.

  To solve this problem, a sprinkler fire extinguishing system has been proposed that is configured to stop the pump start by outputting a stop signal to the pump control panel when an earthquake early warning is received. Water leakage due to head breakage can be suppressed (Patent Document 2).

  In addition, if the fire detector is activated after an earthquake occurs, the fire signal is input to the control panel to cancel the pump operation stop function, and the pump is started by detecting the pressure drop in the main water supply. Yes.

JP 2002-29192 A Japanese Patent No. 5187880

  By the way, in the case of a sprinkler fire extinguisher that stops pump activation when such a conventional earthquake early warning is received, if a fire detector is activated after an earthquake occurs, a fire signal is displayed on the control panel. Is input to cancel the pump operation stop function, and a pressure drop in the main water supply pipe is detected to start the pump. However, in the same way as in the steady monitoring state, it is detected by the pressure switch provided in the pressure tank to which the pressurized water of the main water supply pipe is introduced, the pressure drop detection signal is output to the pump control panel, and the fire pump is started. Since a pressure drop in the water supply main pipe is also assumed, the time delay from the start of the fire pump to the rated operation state of the specified pump discharge pressure increases, and during that time, the amount of water discharged from the activated sprinkler head It may temporarily decrease and the initial fire fighting may be uncertain.

  On the other hand, it is necessary to continue to secure building functions even after an earthquake in applications that cannot be stopped, government facilities and hospitals that are central facilities for early restoration of damage caused to local communities.・ It is necessary to take measures to ensure the functions are positive in terms of facilities.

  FIG. 3 is a time chart showing an example of facility operation when a fire occurs after an earthquake in a conventional facility.

  As shown in FIG. 3, if an earthquake occurs at time t1, the pump is stopped and the water supply function is stopped. Thereafter, if a fire occurs at time t2, the pump start / stop is canceled. Subsequently, assuming that the sprinkler head is activated by receiving a thermal airflow due to a fire at time t3, the pressure in the water supply main pipe decreases accordingly, and at time t4, the pressure switch is activated to start the fire pump. The fire-extinguishing pump started at time t4 enters rated operation at time t5 thereafter, and the pressure in the water supply main pipe that has decreased during that time is recovered, and water discharge from the activated sprinkler head is continued.

  However, the water discharge from the sprinkler head operated at time t3 decreases by time t4 when the pump is started, and is recovered at time T5 by the start of the fire pump from time t4. As a result, sufficient fire extinguishing ability cannot be obtained. In particular, in the event of an earthquake, due to the leakage of water due to damage to the piping, it takes time for the pressure in the water supply mains to recover to the specified pressure as shown at time t5 even when the fire pump is started. There is a possibility that the amount of water discharged from the sprinkler head is reduced and the initial fire fighting becomes uncertain.

The present invention provides a fire extinguishing equipment that can ensure a fire extinguishing equipment function as continuously as possible even when damaged due to an earthquake and can cope with a fire that occurs after the occurrence of an earthquake. With the goal.

The present invention is a fire extinguishing facility in which a closed-type sprinkler head is connected to the secondary side pipe of the water flow detection device, and the primary side pipe from the fire pump to the water flow detection device is filled with pressurized water.
A pressure detector that detects a pressure drop in the primary pipe and outputs a pressure drop detection signal;
An earthquake detection device that detects an earthquake and outputs an earthquake detection signal;
A fire detector that detects a fire in the protected area and outputs a fire signal;
The fire extinguishing pump is activated when the pressure drop signal is received without receiving the earthquake detection signal. When the earthquake detection signal is received, the fire extinguishing pump is not activated even when the pressure drop signal is received. A control unit that activates the fire-extinguishing pump when receiving
Is provided.

  Here, a receiving device that outputs an earthquake detection signal when an earthquake early warning is received is provided as the earthquake detection device.

Further, as the earthquake detection device, a seismic device that operates at a seismic intensity of a predetermined level or more and outputs an earthquake detection signal may be provided in the protection section.

  According to the present invention, in a fire extinguishing facility in which a closed-type sprinkler head is connected to the secondary side pipe of the water flow detection device, and the primary side pipe from the fire pump to the water flow detection device is filled with pressurized water, the primary side A pressure detector that detects a pressure drop in the piping and outputs a pressure drop detection signal, an earthquake detection device that detects an earthquake and outputs an earthquake detection signal, and detects a fire in the protective zone and outputs a fire signal Fire detector and fire extinguishing pump is activated when a pressure drop signal is received without receiving an earthquake detection signal. When an earthquake detection signal is received, the fire extinguishing pump is not activated even when a pressure drop signal is received. , And a control unit that activates the fire pump when a fire detection signal is received, a large earthquake occurs and a strong impact is applied, causing damage to the sprinkler head and piping, causing water leakage. If an earthquake is detected even if a force drop is detected, the fire pump is not started, and the water leakage from the damaged sprinkler head and piping is kept in the water leakage that has filled the piping. It is possible to suppress damage and secure water stored in the water source tank to prepare for fire after an earthquake.

  In addition, when an earthquake is detected, the fire extinguishing pump is not activated even if a pressure drop in the pipe is detected. However, if a fire in the protective zone is detected at this time, the fire extinguishing pump is activated based on the fire detection, and the hot air from the fire is detected. Before the sprinkler head is actuated in response to the flow, the activated fire pump is in the rated operating state, and when the sprinkler head is actuated, there is no temporary reduction in water discharge, and sufficient discharge from the beginning. Secure the amount of water to enable reliable initial fire fighting.

In particular, it is assumed that water leakage has occurred due to piping damage due to an earthquake, but even if there is water leakage, when the sprinkler is activated by starting the fire pump based on fire detection, By being in a close state, even if there is water leakage, it is possible to secure a sufficient water discharge amount from the activated sprinkler head.

Explanatory drawing showing the outline of the sprinkler fire extinguishing equipment Explanatory drawing which showed the equipment operation when a fire occurred after an earthquake about the fire extinguishing equipment of the present invention Explanatory diagram showing equipment operation when fire occurred after an earthquake for conventional fire extinguishing equipment

[Outline of sprinkler equipment]
FIG. 1 is an explanatory view showing an outline of a wet sprinkler fire extinguishing equipment as a fire extinguishing equipment of the present invention. As shown in FIG. 1, a fire pump 10 is installed in a pump room such as a basement floor of a building and is driven by a motor 12. The motor 12 is controlled to start and stop by the pump control panel 14. The fire pump 10 driven by the motor 12 sucks fire water from the water source tank 15 and supplies pressurized fire water to a water supply main pipe 16 arranged in the height direction of the building.

  A pressure tank 18 having a pressure switch 20 for starting the pump is provided for the fire pump 10. The pressure switch 20 functioning as a pressure detector detects that the pressure inside the water supply main pipe 16 has dropped below a specified pressure, and outputs a pressure drop detection signal E1 to the pump control panel 14, thereby driving the motor 12. The fire pump 10 is started.

  A branch pipe 22 is drawn out from the water supply main pipe 16 for each protection section of the building, for example, by floor. A flowing water detector 24 is provided at a branch portion of the branch pipe 22, and a closed sprinkler head 26 is provided at the branch pipe 22 on the secondary side. A terminal test valve 28 is provided on the terminal side of the branch pipe 22, and its secondary side is connected to the drain pipe 32 through the orifice 30.

  The piping leading to the fire pump 10, the water supply main pipe 16 and the sprinkler head 26 is filled with pressurized water. The flowing water detection device 24 closes the valve body in a normal monitoring state, and when the sprinkler head 26 is opened due to a fire and sprays water for fire extinguishing, the valve body is opened by the water flow accompanying the water spray, and the movement of the valve body is interlocked. The running water detection switch is turned on, and a running water detection signal is transmitted to the sprinkler monitoring panel 38 to display an operation display or a fire display.

  Further, a fire detector 36 connected to a sensor line drawn from the self-report receiver 34 is installed in the protection zone where the sprinkler head 26 is installed. The self-fire report receiver 34 receives a fire detection signal from the fire detector 36, outputs a fire alarm, and outputs a fire signal E3 as a transfer signal.

[Pump control panel and earthquake disaster equipment]
As a seismic detection device for the sprinkler fire extinguishing equipment shown in FIG. 1, a seismic device 40 is provided in a protective section and a receiving device 42 is provided.

(Configuration of the seismoscope)
The seismic device 40 operates at a seismic intensity of a predetermined level or higher and outputs an earthquake detection signal E4 to the pump control panel 14. The seismic intensity at which the seismic device 40 operates to output the seismic detection signal E2 is determined according to the seismic strength of the protection section and the seismic strength of the fire extinguishing equipment, and is set to operate at a seismic intensity of 5 or more, for example. The seismic device 40 uses, for example, an acceleration sensor that detects roll and pitch associated with an earthquake, a mechanical earthquake sensor that detects by turning on a switch contact with a moving built-in sphere.

(Receiver configuration)
The receiving device 42 has a receiving function for television broadcasting, FM broadcasting, or AM broadcasting, and when receiving an earthquake early warning (EEW) announced by the Japan Meteorological Agency, the earthquake detection signal E2 is sent to the pump control panel 14. Output. The earthquake early warning received by the receiver 40 is a warning issued by the Japan Meteorological Agency with an estimated maximum seismic intensity of less than 5 for the general public, and a serious disaster may occur due to earthquake motion in areas where strong shaking is expected It is a broadcast that warns that there is.

  The earthquake early warning is, for example, “(twice chime sound) emergency earthquake early warning. Beware of strong shaking. The receiving device 40 determines the chime sound of the emergency earthquake warning and outputs an earthquake detection signal E4. In addition to receiving the broadcast, the receiving device 42 may receive the earthquake early warning by the Internet distribution via the mobile phone network or the wireless LAN, and output the earthquake detection signal E2.

(Configuration of pump control panel)
The pump control panel 14 includes a control unit 44 and a drive unit 46. The control unit 44 includes a pressure drop detection signal E1 from the pressure switch 20, an earthquake detection signal E2 from the seismic sensor 42, a fire signal E3 from the self-fired receiver 38, an earthquake detection signal E4 from the receiver 42, and The water level detection signal E5 from the water level detection switch 17a provided in the priming water tank 17 is input. It is assumed that the water level detection signal E5 from the water level detection switch 17a detects the normal water level range and satisfies the pump start condition.

  In the normal monitoring state, the control unit 44 does not receive the earthquake detection signal E2 or E4 from the seismic device 40 and / or the receiving device 42. In this case, the control unit 44 uses the pressure switch 20 provided in the pressure tank 18. When the pressure drop signal of the water supply main pipe 16 is received, the drive unit 46 is instructed to start the fire pump. This is a normal control in which the sprinkler head 26 is actuated by a fire to detect a drop in the pressure in the water supply main pipe 16 and activate the fire pump 10.

  On the other hand, when the control unit 44 receives the earthquake detection signals E2 and E4 from the seismic sensor 40 and / or the receiving device 42, the control unit 44 reports the fire signal E3 by the fire detection of the fire detector 36 provided in the protection section as a self-report. When receiving from the receiver 38, the drive part 46 is instruct | indicated and control which starts the fire pump 10 is performed.

  For this reason, even if a large earthquake occurs and a strong impact is applied, the sprinkler head 26 and the piping are damaged, water leakage occurs, and the pressure switch 20 detects a decrease in the pressure inside the water supply main pipe 16, for example, a vibration sensing When an earthquake is detected by the vessel 40, the fire pump 10 is not started, and leakage from the damaged sprinkler head 26 and the piping portion is kept in the leakage of the pressurized water filled in the piping to suppress damage caused by water damage. In addition, it is possible to secure the stored water in the water source tank 15 and prepare for a fire after the earthquake occurs.

  Further, when the control unit 44 has received the earthquake detection signals E2 and / or E4 from the seismic device 40 and / or the receiving device 42, the fire extinguishing pump 10 is detected even if a decrease in the pressure in the water supply main pipe 16 is detected. However, if a fire in the protected area is detected by the fire detector 36 at this time, the fire pump 10 is started based on the reception of the fire signal E3, and the continuous water discharge from the sprinkler head 26 activated by the fire is possible. As early as possible.

  Further, the control unit 44 has a fault indicating a fault that the self-report receiver 38 cannot output the fire signal E1 when receiving the earthquake detection signals E2 and / or E4 from the seismic device 40 and / or the receiving device 42. When the signal is received, the start-up control of the fire pump 10 based on the reception of the fire signal E3 is canceled, and when the pressure drop signal of the water supply main pipe 16 is received by the pressure switch 20 provided in the pressure tank 18, the fire pump 10 is started. Examples of the failure in which the self-report receiver 38 cannot output the fire signal E3 include a signal indicating that the self-report receiver 34 is interlocked, stopped, the power is turned off, and the inspection is in progress.

  Here, as a seismic detector for detecting an earthquake, in addition to the receiving device 42, a seismic device 40 is provided. It senses and outputs an earthquake detection signal E2, enabling the start-up control of the fire pump 10 when the fire detector 36 is activated, and improving the certainty of earthquake detection.

  In addition, when the emergency notification valve 34 receives a failure signal indicating a failure that the fire alarm receiver 34 cannot output the fire signal E3 after the emergency cutoff valve 46 is being controlled to be closed or after the emergency shutdown valve 46 is closed, the emergency cutoff valve 46 Is controlled by opening. Here, the failure that the self-report receiver 34 cannot output the fire signal E3 includes, for example, a signal indicating that the self-report receiver 34 has stopped interlocking, has stopped transferring, is turned off, and is being inspected.

[Equipment operation]
FIG. 2 is a time chart showing an example of the operation of the fire extinguishing equipment of FIG. 1 when a fire occurs after an earthquake.

  As shown in FIG. 2, if an earthquake occurs at time t1, the pump control panel 14 starts the pump activation by the operation of the fire detector 36 from the pump activation control by the pressure drop detection signal from the pressure switch 20 until then. Switch to control. Thereafter, when a fire occurs at time t2 and a fire signal E3 is received, the fire extinguishing pump 10 is activated.

  At this time, the sprinkler head 26 is not yet operated, so that the pressure inside the water supply main pipe 16 is at a specified pressure if there is no water leakage, and the fire-extinguishing pump 10 that has started up stands up to rated operation for a predetermined time. Subsequently, the sprinkler head 26 is activated at time t3 in response to a thermal air current due to a fire. At this time, the fire pump 10 is in the rated operation or is in the stage before entering the rated operation. The pressure drop is slight, and the amount of water discharged from the sprinkler head 26 hardly falls, and by ensuring the prescribed amount of water continuously, reliable initial fire extinguishing is possible.

  Further, when a pipe is damaged due to an earthquake at time t1 and water leaks, the pressure in the water supply main pipe 16 starts to decrease as shown by an imaginary line, for example. Upon receiving the signal E3, the pump control panel 14 activates the fire pump 10, the reduced pressure quickly recovers to the specified pressure, and when the sprinkler head 26 is activated at time t3, the fire pump 10 enters the rated operation. The water discharge amount from the sprinkler head 26 hardly falls, and a reliable initial fire extinguishing is possible.

[Modification of the present invention]
(Earthquake detector)
In the above embodiment, the receiving device and the seismic device are provided as the earthquake detector, but only one of them may be provided.

(Other sprinkler fire extinguishing equipment)
In the above embodiment, the wet sprinkler facility is taken as an example. However, the present invention can be applied to the pump activation of a dry sprinkler facility or a wet or dry pre-acting sprinkler fire extinguishing facility.

(Other)
The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Fire pump 14: Pump control panel 16: Water supply main pipe 18: Pressure tank 20: Pressure switch for pump activation 22: Branch pipe 24: Flowing water detector 26: Sprinkler head 34: Self-reporting receiver 36: Fire detector 38: Sprinkler monitoring panel 40: Seismic device 42: Receiver 44: Control unit 46: Drive unit

Claims (3)

In a fire extinguishing facility in which a closed-type sprinkler head is connected to the secondary pipe of the water flow detector, and the primary pipe from the fire pump to the water flow detector is filled with pressurized water.
A pressure detector that detects a pressure drop in the primary pipe and outputs a pressure drop detection signal;
An earthquake detection device that detects an earthquake and outputs an earthquake detection signal;
A fire detector that detects a fire in the protected area and outputs a fire signal;
The fire extinguishing pump is activated when the pressure drop signal is received without receiving the earthquake detection signal, and the fire extinguishing pump is not activated even when the pressure drop signal is received when the earthquake detection signal is received. A control unit that activates the fire pump when the fire detection signal is received;
Fire extinguishing equipment characterized by providing
2. The fire extinguishing equipment according to claim 1, wherein a receiving device that outputs an earthquake detection signal when an earthquake early warning is received is provided as the earthquake detection device.
  2. The fire extinguishing equipment according to claim 1, wherein a seismic device that operates at a seismic intensity of a predetermined level or more and outputs an earthquake detection signal is provided in the protection section as the earthquake detection device.

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