JPH0759254B2 - Pre-operated sprinkler fire extinguisher for apartment buildings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-operation type sprinkler fire extinguisher for a shared house, in which a sprinkler head is installed in each dwelling unit, and a valve of the pre-operation valve device is opened to extinguish a fire by actuation of a fire detector or the like .

[0002]

2. Description of the Related Art In recent years, apartments and other apartment houses have become higher in height, and on high floors where fire trucks cannot reach, once a fire occurs, there is a solid fire-prevention section, so it is adjacent. Although it is possible to prevent the spread of fire to the dwelling units to some extent, it is considerably difficult to extinguish the dwelling units themselves where the fire occurred.

For this reason, it is important to initially extinguish a fire when a fire occurs, and it is considered to install a sprinkler head for each dwelling unit, especially for the higher floors of an apartment house such as a high-rise condominium. The sprinkler fire extinguishing equipment for each dwelling unit of such an apartment has not been put into practical use at present, and it is necessary to consider an equipment configuration unique to the apartment such as a department store sprinkler extinguishing equipment.

In a general sprinkler fire extinguishing facility, a closed type sprinkler head is installed in a fire extinguishing target area, and in a steady monitoring state, a pipe to the sprinkler head is filled with pressurized fire extinguishing water. When a fire occurs, the member that closes the valve of the sprinkler head is disengaged by heat, and fire extinguishing water is discharged. At the same time, the fire extinguishing pump is started based on the drop in pipe pressure and the detection of running water, and pressurized fire extinguishing water is continuously supplied to the sprinkler head.

When such a sprinkler fire extinguisher is applied to an apartment house, a problem is water damage due to malfunction of the sprinkler head. In order to eliminate such water damage, pre-operated sprinkler fire extinguishing equipment can be used. With the pre-operation type sprinkler fire extinguishing equipment, a pre-operation valve device is provided at the branch part of the branch pipe branched from the water supply main for each floor, and pressurized fire extinguishing water is filled up to the primary side of the pre-operation valve device. The piping from the secondary side of the pre-operation valve device to the sprinkler head is empty, and pressurized air is filled instead of pressurized fire extinguishing water.

The operation of the pre-actuated sprinkler fire extinguishing system depends on the fire signal from the fire detector activated by the fire , or
Or fire signal and sprinkling from the secondary side of the pre-actuated valve device.
Pressurized air sprinkles filled up to the clerhead
A pressure switch that detects pressure drop due to cler head operation.
The valve of the pre-operation valve device is opened based on the pressure drop signal from H to supply pressurized fire extinguishing water to the secondary side, and in this state, if the sprinkler head operates by receiving heat from the fire,
The pressurized fire extinguishing water is discharged from the head.

Even if the sprinkler head opens due to a malfunction, the pre-operation valve device is in the closed state, so that only the pressurized air filled on the secondary side is released, and damage to water damage can be prevented. Therefore, from the standpoint of preventing water damage due to malfunction of the sprinkler head, pre-operated sprinkler fire extinguishing equipment is desirable for apartment buildings.

[0008]

By the way, when the pre-actuated sprinkler fire extinguishing equipment is applied to an apartment house, it is basically necessary to extinguish the fire in each dwelling unit. Therefore, the pre-actuated valve device for each floor from the water supply main The branch pipe branched through
Further, each dwelling unit is branched and connected to a sprinkler head in the dwelling unit. Therefore, the pipe length and the internal volume of the pipe from the secondary side of the pre-operation valve device to each dwelling unit increase according to the number of dwelling units.

When the valve of the pre-operation valve device is opened based on the operation of the fire detector or the like , pressurized fire extinguishing water is sent to the heat-sensitive sprinkler head while pushing out the compressed air in the secondary pipe. In this case, the fire extinguishing water is sent to the piping of the dwelling unit in which no fire has occurred, and this may increase the time delay until the fire extinguishing water reaches the sprinkler head that was activated by the fire, and It may take time from the time of operation until the water for fire extinguishing is actually released, and effective initial fire extinguishing may not be possible. Also, if water is passed to non-fire dwelling units, it will be difficult to drain water afterwards.

[0010] The present invention has been made in view of such problems, as with open pre actuated valve device by operation or the like of the fire detector can be released immediately extinguishing water after thermal activation of the sprinkler head It is also an object of the present invention to provide a pre-operated sprinkler fire extinguisher for an apartment house that prevents water from going to a non-fire dwelling unit even if there is a fire.

[0011]

In order to achieve this object, the pre-operation type sprinkler fire extinguisher for an apartment house of the present invention is constructed as follows. The reference numerals in the drawings of the embodiments are also shown. First, the present invention is to operate the fire detector 3 for each floor from the water supply main 2 started up from the fire extinguishing pump 1.
A branch pipe 5 is branched through a pre-operation valve device 4 that opens the valve based on the above, and the branch pipe 5 is further branched for each dwelling unit and connected to a closed type sprinkler head 6 installed in the dwelling unit. Targets pre-operated sprinkler fire extinguishing systems for homes.

In the present invention as such a pre-operation type sprinkler fire extinguishing system for an apartment house, a control valve 7 that is always open in a steady monitoring state is installed in the part where the branch pipe 5 is drawn into each dwelling unit. In addition, a control valve 7 installed in a dwelling unit other than the dwelling unit in which the fire has occurred is discriminated by the actuation signal from the fire detector 3 provided in each dwelling unit.
It is characterized in that a control means (pre-operation valve relay board) 8 for controlling the closing of the valve is provided.

Further, according to the present invention, a flow switch 10 which outputs a detection signal when flowing water exceeding a predetermined flow rate is detected in the pipe 9 of each dwelling unit, and water is discharged from the sprinkler head by the detection signal of the flow switch 10. Is provided with a monitoring means (house information board) 12 for displaying. Further, the control means (pre-operation valve relay board) 8 is characterized in that, when receiving the recovery signal from the fire detector 3, the pre-operation valve device 4 is controlled to be closed after a predetermined time has elapsed after receiving the recovery signal.

[0014]

According to the pre-operation type sprinkler fire extinguisher for an apartment house of the present invention having such a structure, the fire detector 3
When the valve of the pre-operation valve device 4 is opened due to the operation of the above, etc. , the dwelling unit in which a fire has occurred is determined from the actuation signal of the fire detector 3, and the control valve 7 provided in the pipe 9 other than the dwelling unit in which the fire has occurred is closed. In order to control, the supply of pressurized fire extinguishing water to the secondary side of the control valve 7 of another non-fire dwelling unit is blocked, and the pressurized fire extinguishing water is quickly sent to the activated sprinkler head 6 to quickly extinguish the fire. You can

A flow switch 1 which outputs a detection signal when flowing water exceeding a predetermined flow rate is detected in the pipe 9 of each dwelling unit.
By monitoring the detection signal from 0, it can be grasped whether water is actually discharged from the sprinkler head 6. Further, since the valve of the pre-operation valve device 4 is controlled to be closed after a predetermined time has elapsed after receiving the restoration signal from the fire detector 3, it is possible to automatically stop the water discharge after the fire is extinguished, thereby preventing water damage. it is possible to minimize, completely extinguished by a predetermined time after recovery water discharge even if not completely full <br/> extinguishing.

[0016]

FIG. 1 is a block diagram of an embodiment showing an embodiment of the fire extinguishing equipment of the present invention. In FIG. 1, reference numeral 1 is a fire extinguishing pump, which is driven by a motor 13 to supply fire extinguishing water from a water source water tank 14 to a water supply main 2 which has been set up in a vertical direction of a building. The motor 13 is operated under the control of the pump control board 15.

Further, a pressure tank 16 is provided for the fire extinguishing pump 1, and the pressure tank 16 receives internal pressure of the water supply main 2 and compresses the internal air. Pressure tank 16
The pressure switch 17 is provided in the pressure switch 17, and when the pressure in the main pipe 2 of the water supply main pipe 2 decreases due to the opening of the pre-operation valve device which will be described later, this pressure drop is detected by the pressure switch 17 and Upon receiving the detection output, the pump control panel 15 drives the motor 13 to start the operation of the fire pump 1.

An elevated water tank 18 is provided on the roof on which the main water supply pipe 2 is started up, and the head of the elevated water tank 18 can back up the pressure in the pipe. A branch pipe 5 is drawn out from the water supply main 2 for each floor of the building, and in this embodiment, the nth floor and the (n + 1) th floor are taken out and shown, and the following description will be focused on the nth floor. To do.

A pre-operation valve device 4 is provided at a branch portion of the branch pipe 5 via a sluice valve 19. The secondary side of the pre-operation valve device 4 is further connected to the branch pipe 5 via the sluice valve 20.
Is further branched into a dwell unit pipe 9 for each dwell unit. In this embodiment, one dwelling unit is shown for each floor for convenience of explanation, but the same dwelling unit piping configuration following the dwelling unit piping 9 is provided for each dwelling unit.

The end test valve 21 is provided at the end of the branch pipe 5.
Is provided, and the operation test can be performed by opening the end test valve 21 at the same flow rate as when one sprinkler head is operated. A pre-operation valve relay board 8 is provided for the pre-operation valve device 4 provided on each floor. The dwelling unit piping 9 of each dwelling unit is drawn into a meter box 22 provided for each dwelling unit, and the electric valve 7 as a control valve is provided in the meter box 22.
And a flow switch 10 are provided.

The electric valve 7 provided in the meter box 22 is
Upon receiving a control signal from the pre-operation valve relay board 8 on the same floor, it is always open in the steady monitoring state, and when a fire is detected, the motor-operated valves 7 of the non-fired dwelling units other than the fired dwelling unit are controlled to be closed. The dwelling unit piping 9 taken out from the meter box 22 is a closed type sprinkler head 6 installed in each room in the dwelling unit.
Connected to.

When the closed type sprinkler head 6 receives heat from a fire, the member that closes the valve, a so-called heat-sensitive member, comes off and opens. Furthermore, a fire detector 3 is installed in the dwelling unit, and the fire detector 3 is a relay device 11
And a fire signal when the fire detector 3 is activated by a fire is given to the house information panel 12 provided in the dwelling unit through the relay 11 to display a fire.

The fire detection signal from the repeater 11 is also given to the disaster prevention panel 23 installed in the manager's room, etc.
Simultaneously display the fire alarm and identify the unit where the fire occurred. A pre-operation valve control board 24 is provided in the vicinity of the disaster prevention board 23. When the pre-operation valve control board 24 receives an identification signal of a fire-occurring dwelling unit from the disaster prevention board 23, the pre-operation valve relay board 8 on the fire occurrence floor is lit. A signal indicating the occurrence of fire and a signal indicating the dwelling unit where the fire occurred are sent.

The pre-operation valve relay board 8 which receives the fire occurrence signal from the pre-operation valve control board 24 and the signal of the fire occurrence dwelling unit
Outputs a closing signal to the electric valve 7 of the dwelling unit other than the dwelling unit in which the fire has occurred, and drives the closing. A drainage valve 25 is provided in the meter box 22 provided in the dwelling unit, and the dwelling unit piping 9 is provided at the time of restoration after the sprinkler head 6 is activated.
The water for fire extinguishing inside is designed to be discharged.

Further, compressed air is supplied from the compressor 27 to the pre-operated valve device 4 provided on each floor through the air pipe 26, and the pre-operated valve device 4 is utilized by utilizing this pressurized air. The secondary side branch pipe 5 and the dwelling unit pipe 9 can be filled with pressurized air. Furthermore, fire pump 1
A water supply port 28 for connecting a pressurized water supply hose of a fire pump car or the like is branched and connected to the water supply main 2 from.

FIG. 2 is an explanatory view showing an embodiment of the pre-operation valve device 4 of FIG. FIG. 2 shows the pre-operation valve device 4 in the steady monitoring state, in which the primary pipe 30 is filled with pressurized fire extinguishing water as indicated by diagonal lines, and pressurized fire extinguishing water of the same pressure is added before and after the valve element 32. The valve 31 is maintained in a closed state by the area difference between the front and rear (primary side 1: priming chamber side 2) and the force of the spring 31.

A check valve 34 is provided on the secondary pipe 33. Since the branch pipe 5 ahead of the check valve 34 is filled with pressurized air, and the inside of the secondary pipe 3 is at atmospheric pressure, the check valve 34 is kept closed. Further, the priming chamber 35 accommodating the spring 31 is connected to the drain pipe via the solenoid valve 36, and the solenoid valve 36 is closed in the steady monitoring state.
Holds water for pressurized fire extinguishing.

Further, the priming chamber 35 is connected to the primary pipe 30 via an orifice 37. It should be noted that the connection pipe between the orifice 37 and the primary pipe 30 is adapted to receive the supply of the priming water through the sluice valve 38. The pressure switch 39 detects a pressure increase in the secondary pipe 33. This pressure switch 39
Has a water flow detection function. That is, when the valve body 32 is opened, the pressurized fire extinguishing water flows into the secondary pipe 33 to increase the pressure, and the pressure switch 39 produces a detection output.

The pressure switch 40 is used to reduce the pressure of the pressurized air filled in the branch pipe 5, that is, the sprinkler head.
It operates as a decompression switch that detects the leakage of pressurized air due to the operation of 6 and the damage of the pipe. Auto drip 41 is a valve
A small amount of water leaked to the secondary pipe 33 due to a seat leak
Drain. FIG. 3 is an explanatory view showing the valve opening operation of the pre-operation valve device 4.

The opening operation of the valve shown in FIG. 3 is performed by opening the solenoid valve 36 based on the operation signal of the fire detector. When the solenoid valve 36 is opened, the pressurized fire extinguishing water in the priming chamber 35
From the flow rate of the pressurized water that enters through the orifice 37,
Since the flow rate discharged to the drain pipe via the solenoid valve 36 is larger, the pressure is discharged to the drain pipe side and the pressure drops, and the valve body 32 is pushed by the pressurized fire extinguishing water of the primary pipe 30 and resists the spring 31. And opened as shown in the drawing to supply pressurized fire extinguishing water to the secondary pipe 33.

At this time, the filling air pressure in the branch pipe 5 is lower than the pressurized water pressure in the primary pipe 30, so the check valve 34 is also opened, and pressurized fire extinguishing water is supplied to the sprinkler head. In such a valve opening operation, the pressure switch 39 detects a pressure increase due to the supply of pressurized fire extinguishing water to the secondary pipe 33.

FIG. 4 is an explanatory view showing the recovery operation of the pre-operation valve device. The electromagnetic valve 36 may be closed to restore the pre-operation valve device in the open state as shown in FIG. When the solenoid valve 36 is closed, the priming chamber 35 is opened through the orifice 37.
Valve body 3 by the pressurized fire extinguishing water of the primary pipe 30 supplied to the
Since the front and rear of 2 have the same pressure, the force of the spring 31 pushes the valve body 32 back to the closed position shown in the drawing to close it.

After draining the inside of the pipe from the drain valve, the sprinkler head that has been operated is replaced with a new one, and the compressed air from the air pipe 26 is filled into the branch pipe 5 side to obtain the steady monitoring state shown in FIG. To do. FIG. 5 is a block diagram showing the control and monitoring system shown in FIG. In FIG. 5, each dwelling unit is provided with a housing information board 12 and a relay device 11, and the relay device 11 is connected to, for example, a constant temperature sensor as the fire sensor 3. Further, the flow switch 10 provided in the meter box 22 is connected to the repeater 11.

The actuation signal from the fire detector 3 received by the repeater 11 is sent to the disaster prevention panel 23, and a fire alarm and a fire dwelling unit identification display are performed. From the disaster prevention board 23, a signal indicating a fire occurrence and a fired dwelling unit is given to the pre-operation valve control board 24,
From the pre-operation valve control panel 24, a signal indicating the fire occurrence and the fire occurrence dwelling unit is given to the pre-operation valve relay board 8 installed on the floor of the fire occurrence dwelling unit.

A solenoid valve 36 and pressure switches 39, 40 provided in the pre-operation valve device 4 are connected to the pre-operation valve relay board 8. In addition, the pre-operation valve relay board 8 is connected to the electric valve 7 provided in the meter box 22 of each dwelling unit. The pre-operation valve relay board 8 which receives the signal of the fire occurrence and the fire occurrence dwelling unit from the pre-operation valve control board 24 outputs an opening signal to the solenoid valve 36 of the pre-operation valve device 4, and as shown in FIG. Open the valve.

Although a control signal is not output to the electric valve 7 of the fire-occupied dwelling unit, a closing signal is output to the electric valve 7 of another non-fire dwelling unit on the same floor to close the electric valve 7. Let Here, the fire detection and the notification of the fired dwelling unit to the pre-operation valve relay board 8 are not performed from the pre-operation valve control board 24 side,
It may be performed directly from the repeater 11.

Further, a transfer signal is given from the pre-operation valve relay board 8 to the pre-operation valve control board 24. As the transfer signal, for example, air pressure reduction, pre-operation valve opening or closing, dwell unit electric valve opening or It is closed, running water by dwelling unit, etc. Therefore,
The operation state of the pre-operation valve device 4 provided on the fire occurrence floor is displayed on the pre-operation valve control panel 24, and the state can be confirmed.

Furthermore, it is possible to confirm that the sprinkler head is in operation by displaying the running water based on the detection signal of the flow switch 10 provided in the fired dwelling unit. Further disaster prevention board 23
In response to this, a signal indicating the operating state is given from the pump control panel 15, and it can be confirmed that the pump is stopped. Further, although the pump control board 15 starts the pump based on the pressure drop by the pressure switch 17, the pump control board 15 may start the pump by detecting running water due to the operation of the sprinkler head.

FIG. 6 is a flow chart showing an operation procedure when a fire occurs in the pre-operation type sprinkler fire extinguishing equipment of the present invention. In FIG. 6, first, when a fire occurs in S1, the fire detector 3 is activated in S2, and the solenoid valve 36 of the pre-operation valve device 4 is opened in S3 based on the activation of the fire detector 3.
The pre-operation valve opens in S4.

With the opening of the pre-operation valve, the pressure switch 39 operates in S5. Subsequently, in S6, the pressure reduction of the pre-operation valve primary side, that is, the water supply main 2 is performed by the pressure switch 1 of the pressure tank 16.
7 and the pressure switch 17 is activated in S7, S8
Then, the fire pump 1 is started. When the pump is started, the pre-operation valve secondary side piping is filled with pressurized water in S9, and in S10, S
The sprinkler head 6 operates in accordance with the spread of the fire shown in 25.

As a result, water for fire extinguishing is discharged from the sprinkler head 6 in S11, and the meter box 22 of the dwelling unit is discharged.
The flow switch 10 provided in step S12 is turned on in S12. Then, if the fire is extinguished or the fire is suppressed in S14 through the continuous water discharge state in S13, the fire detector is restored in S15. When the fire detector 3 is restored, the solenoid valve 36 of the pre-operation valve device 4 is closed after a predetermined time, that is, the time taken to completely extinguish the fire, and the pre-operation valve is closed in S17 as shown in FIG. Then, in S18, the water discharge from the sprinkler head is stopped.

Then, in step S19, the flow switch 10 is turned off, and the recovery after the fire extinguishing check in step S27 is started. on the other hand,
If the flow switch 10 is turned off in S19 and then fire or fire occurs again as shown in S20, the fire detector 3 is activated in S21, and the solenoid valve of the pre-operation valve device 4 is activated in S22. After opening, the pre-operation valve is opened again in S23, pressurized water is supplied to the pre-operation valve secondary side pipe in S24, and the procedure returns to S11 or the sprinkler operation of S10 is newly performed after the fire spread in S25. Return.

On the other hand, when the fire detector 3 is activated in S2, the meter box 22 of the non-fire dwelling unit is operated as shown in S26.
The motor-operated valve 7 provided in the is closed. By closing the electric valve 7 of the non-fire dwelling unit, it is possible to prevent the supply of unnecessary pressurized fire extinguishing water to the sprinkler head side pipe of the non-fire dwelling unit, and to quickly supply the fire extinguishing water to the sprinkler head of the fired dwelling unit. And it can be performed sufficiently.

In the above embodiment, the operation of the fire detector 3 is performed.
The solenoid valve 36 was opened only by the movement, and the pre-operation valve was opened.
Is the detection output of the pressure switch 40, that is, the sprinkler.
-Pressure drop due to operation of head 6 and operation of fire detector 3
The solenoid valve 36 is opened when both fire signals from
You may let it go.

[0045]

As described above, according to the present invention, since it is a pre-operation type, it is possible to reliably prevent water damage due to malfunction of the sprinkler head. In addition, by providing a control valve for each dwelling unit and closing the control valve of a non-fire dwelling unit in the event of a fire to suppress the supply of unnecessary pressurized fire extinguishing water to the dwelling unit side, the sprinkler head is activated after a fire. It is possible to minimize the time delay until the fire-extinguishing water is actually discharged, and supply sufficient fire-extinguishing water to perform effective initial fire extinguishing.

Further, since unnecessary water is not supplied to the non-fire dwelling unit, the recovery work after extinguishing the fire becomes easy. Further, even in the event of a fire, water damage due to malfunction of the sprinkler head in a non-fire dwelling unit can be prevented. In addition, since the valve of the pre-operation valve device is automatically opened and closed by the fire and recovery signal from the fire detector, water damage damage after extinguishing can be minimized and reignition after extinguishing should it occur. Even water can be quickly discharged from the sprinkler head again.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment showing the configuration of a fire extinguishing facility of the present invention.

FIG. 2 is an explanatory view of a steady monitoring state of the pre-operation valve device used in the present invention.

FIG. 3 is an explanatory diagram of a valve opening operation of the pre-operation valve device used in the present invention.

FIG. 4 is an explanatory diagram after a restoration operation of the pre-operation valve device used in the present invention.

FIG. 5 is a block diagram of an embodiment showing the device configuration of the present invention.

FIG. 6 is a flowchart showing an operation procedure of the present invention.

[Explanation of symbols]

1: Fire pump 2: Water supply main 3: Fire detector 4: Pre-operation valve device 5: Branch pipe 6: Sprinkler head (closed type) 7: Electric valve (control valve) 8: Pre-operation valve relay board 9: Housing unit Piping 10: Flow switch 11: Repeater 12: House information board (monitoring means) 13: Motor 14: Water source water tank 15: Pump control board 16: Pressure tank 17, 39, 40: Pressure switch 18: Elevated water tank 19, 20, 38: Gate valve 21: Terminal test valve 22: Meter box 23: Disaster prevention panel 24: Pre-operation valve control panel 26: Air piping 27: Compressor 28: Water supply port 30: Primary piping 31: Spring 32: Valve body 33: Secondary Piping 34: Check valve 35: Water chamber 36: Solenoid valve 37: Orifice 38: Drain valve 39, 40: Pressure switch

Claims (3)

[Claims] 1. A branch pipe is drawn out from a water supply main started up from a fire extinguishing pump through a pre-operation valve device that opens a valve for each floor based on the operation of a fire detector, etc. In a pre-operation type sprinkler fire extinguisher for an apartment house that is connected to a closed type sprinkler head that is branched for each dwelling unit and installed inside the dwelling unit, it is installed in the part where the branch pipe leads to each dwelling unit and is always open in the steady monitoring state. The control means for controlling the closing of the control valve installed in a dwelling unit other than the fired dwelling unit by distinguishing the dwelling unit in which a fire has occurred from the control valve and the fire detector provided in each dwelling unit. A pre-actuated sprinkler fire extinguisher for an apartment house, characterized in that 2. The pre-operation type sprinkler fire extinguisher for an apartment house according to claim 1, and a flow switch that outputs a detection signal when flowing water exceeding a predetermined flow rate is detected in the pipe of each dwelling unit, and the flow. A pre-operation type sprinkler fire extinguisher for an apartment house, which is provided with a monitoring means for displaying water discharge from the sprinkler head by a switch detection signal. 3. The pre-operation type sprinkler fire extinguisher for an apartment house according to claim 1, wherein when the control means receives a restoration signal from the fire detector, a predetermined time after the restoration signal is received. A pre-actuated sprinkler fire extinguisher for an apartment house, characterized in that the pre-actuated valve device is controlled to be closed.