JP2912892B1 - Sprinkler fire extinguishing equipment - Google Patents

Abstract

An object of the present invention is to prevent the corrosion of piping caused by residual water and to suppress the spread of fire due to the discharge of filling air when a sprinkler head operates. A fire extinguishing pipe on the secondary side of the water flow detection device 8 is intended for a sprinkler fire extinguishing equipment such as a dry type equipment or a pre-operation type equipment that does not fill the fire extinguishing pipe 9 on the secondary side of the water flow detection device 8 with fire water. 9 is provided with a fire extinguishing gas filling device for filling a fire extinguishing gas such as nitrogen gas. The fire extinguishing gas filling device includes a nitrogen gas cylinder 20 filled with nitrogen gas, a gas pipe 21 for supplying a fire extinguishing gas from the nitrogen gas cylinder 20 to a fire extinguishing pipe 9 on the secondary side of the flowing water detector 8, and a nitrogen gas supplied by the gas pipe 21. Regulator 22 that regulates gas pressure to a predetermined value
Is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing pump, which is connected to a sprinkler head by connecting a fire extinguishing pipe to a protection section via a flowing water detecting device, and to fill the fire extinguishing pipe on the primary side of the flowing water detecting device with fire extinguishing water. The present invention relates to a sprinkler fire extinguishing equipment such as a dry type equipment or a pre-operation type equipment in which fire extinguishing water is not filled in a fire extinguishing pipe on a secondary side of a water sink.

[0002]

2. Description of the Related Art Conventionally, in a sprinkler fire extinguishing system, a fire extinguishing pipe from a fire extinguishing pump system is connected to a caution area via a running water detecting device, and a closed type sprinkler head is connected to the secondary side of the running water detecting device. There are dry facilities and pre-actuated facilities that are not filled with fire water.

[0003] In these dry-type facilities and pre-operation-type facilities, pressurized air is supplied to the fire extinguishing pipe on the secondary side of the flowing water detecting device by a compressor during normal monitoring to fill it.

[0004]

However, the secondary pipe of the flow detecting device of such dry equipment or pre-operated equipment is basically a dry pipe at the time of normal monitoring. Sometimes when fire extinguishing water is filled in the pipe on the secondary side of the flowing water detection device, it is difficult to completely drain the water due to problems such as the shape of the pipe, and water may remain in the pipe.

When oxygen is supplied by filling the compressor with fresh air in a state of high humidity due to residual water in the pipe, the pipe becomes very susceptible to corrosion, and in the worst case, a through hole is formed. In some cases, the function of the equipment may be adversely affected. Also, in such a fire extinguishing system, since the pressurized air is always filled in the secondary pipe of the flowing water detection device by the compressor, the head is discharged until the water is started when the sprinkler head is activated by a fire. It has long been feared that pressurized air could blow out into the room, causing the fire to spread due to the action of a bellows.

[0006] The present invention has been made in view of such conventional problems, and thus reliably prevents corrosion due to residual water in pipes and discharges charged air when the sprinkler head operates. An object of the present invention is to provide a sprinkler fire extinguishing system that suppresses the spread of fire.

[0007]

First, the present invention relates to a fire extinguishing pump and a fire extinguishing pipe connected to a guard area through a running water detecting device, connected to a closed sprinkler head, and connected to a primary side of the running water detecting device. Water flow detection in sprinkler fire extinguishing equipment such as dry-type equipment and pre-operation equipment that does not fill the fire extinguishing pipe with fire extinguishing water and the secondary side fire extinguishing pipe.
Supply fire-extinguishing gas to the fire-extinguishing pipe on the secondary side of the equipment.
A fire gas filling device is provided.
Gas cylinder filled with gas and fire extinguishing filled into gas cylinder
Gas that supplies gas to the fire extinguishing pipe on the secondary side of the water flow detection device
Predetermined pressure of fire extinguishing gas supplied by piping and gas piping
Pressure regulator and a gas cylinder.
When the pressure of the fire-extinguishing gas decreases and reaches the specified pressure,
Compressor to supply pressurized air to the air piping
And said that you and a facility.

Thus, during normal monitoring, the running water detection device
Fill the secondary piping with a fire-fighting gas that does not contain oxygen.
Therefore, oxygen that causes corrosion of piping is
It can be completely shut off from inside the secondary pipe. Also,
When the sprinkler head is activated due to a fire
Fire extinguishing gas flows into the room from the
Until the water is released from the head of
The spread of disaster can be suppressed. And the gas cylinder
When the pressure of the extinguishing gas supplied by
Supply compressed air by piping compressor equipment and back
Can be up.

Further, the present invention provides a fire extinguishing gas filling device,
The fire extinguishing gas filling device is a gas bottle filled with fire extinguishing gas.
Flowing water detection device for fire extinguishing gas filled in a gas cylinder
To the gas pipe to be supplied to the fire extinguishing pipe on the secondary side of
Regulation to regulate the pressure of the extinguishing gas supplied from
And a spare gas cylinder filled with fire extinguishing gas,
The pressure of the extinguishing gas supplied by the cylinder drops,
In case of pressure, the gas pipe is filled with a spare gas cylinder.
To control the supply of fire extinguishing gas
And a switching device.

For this reason, when the pressure of the fire-extinguishing gas decreases.
Extinguishing gas is filled from the spare gas cylinder and backed up
Is done.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG .
An embodiment of the sprinkler fire extinguishing system of the present invention is shown.
Things.

In FIG . 1 , a fire pump 1 is installed on the basement of a building or the like, and the fire pump 1 is driven to rotate by a motor 2. The motor 2 is started and stopped by the pump control panel 3. The suction pipe of the fire pump 1 is set down in the water source tank 4. The discharge side of the fire pump 1 is connected to a fire extinguisher pipe 5, and the fire extinguisher pipe 5 stands down in the vertical direction of the building and connects to an auxiliary elevated water tank 14 installed on a rooftop or the like.

From the middle of the fire extinguishing pipe 5 installed in the vertical direction of the building, for example, a branch pipe 6 is drawn out to the security area for each floor of the building. The branch pipe 6 is provided with a pre-actuated running water detection device 8 following the control valve 7.
The fire extinguishing pipe 9 on the secondary side of the pre-actuated running water detection device 8 is provided in a guard area, and a closed sprinkler head 10 is installed. The end of the fire extinguishing pipe 9 is connected to the drainage side via an end test valve 11.

A pressure tank 12 is provided on the fire pump 1 side, and fire-extinguishing water filled under pressure is introduced into the fire-extinguishing pipe 5 to compress the internal air. A pump activation pressure switch 13 is provided for the compressed air in the pressure tank 12. The pump start-up pressure switch 13 operates by a pressure drop in the fire extinguishing pipe 5 due to the operation of the sprinkler head 10 and the pre-operation valve of the pre-operation type running water detection device 8, and starts the motor 2 by the pump control panel 3, Fire pump 1
To drive. The fire pump 1 is provided with a priming tank 19 for supplying priming water. The priming tank 19 is provided with a water level gauge 19a, and a detection signal of the water level gauge 19a is given to the pump control panel 3. .

In the guard area where the sprinkler head 10 is installed, a fire detector 15a for a pre-operation type facility and a fire detector 15b for a self-fire alarm facility are installed. The fire detector 15a for the pre-operation type equipment is connected to the pre-operation valve control panel 18. The fire detector 15 b for the self-fire alarm equipment is connected to the self-fire alarm receiver 16. Pre-actuation valve control panel 18
, A detection signal from a flowing water alarm pressure switch 17 provided in the pre-operation type flowing water detecting device 8 is input.

The pre-actuation valve control panel 18 includes a fire detector 15a.
Receiving the alarm signal from the pre-operation type running water detection device 8
The opening of the pre-actuating valve provided in the fire extinguishing water is caused to flow through the fire extinguishing pipe 9 on the secondary side. Pressure switch 17 for running water alarm
Detects this flowing water and informs the pre-operation valve control panel 18 that the pre-operation valve has opened. In the present invention for such a pre-operation type facility, in order to fill the fire extinguishing pipe 9 on the secondary side of the pre-operation type running water detecting device 8 with a fire extinguishing gas, for example, nitrogen gas, instead of the conventional compressed air, A nitrogen gas filling device is provided. In this nitrogen gas filling apparatus, a gas pipe 21 is drawn from a nitrogen gas cylinder 20 filled with nitrogen gas, and connected to the secondary side of the pre-operation type running water detector 8 so that the nitrogen gas is supplied to the secondary side.

A regulator 22 is provided in the gas pipe 21 on the side of the nitrogen gas cylinder 20. Nitrogen gas is filled in the secondary pipe 9 of the pre-operation type running water detector 8 at a set pressure set in the regulator 22. Supplied. A control valve 23, a flow regulating valve 24, and a check valve 25 are provided on the gas pipe 21 on the side of the pre-actuated running water detector 8.
Is opened, the supply and filling of the nitrogen gas into the secondary pipe 9 is performed at the flow rate adjusted by the flow rate adjustment valve 24.

A nitrogen gas cylinder 20 and a regulator 2
Between the two, a pressure switch 26 for detecting the charged amount for detecting that the charged amount of the nitrogen gas in the nitrogen gas cylinder 20 has decreased to a predetermined pressure is provided. The detection signal of the pressure switch 26 is supplied to, for example, the self-fire alarm receiver 16 to display an alarm indicating that the amount of nitrogen gas filled in the nitrogen gas cylinder 20 has decreased, thereby prompting the user to replace the nitrogen gas cylinder 20.

A pressure switch 27 for alarming pressure reduction is provided for the fire extinguishing pipe 9 on the secondary side of the pre-operation type running water detecting device 8 in which nitrogen gas is supplied and filled by the gas pipe 21. The pressure switch 27 for depressurization warning is activated by a sudden drop in the pressure of the filling gas due to breakage or the like, and the pre-actuation valve control panel 18 can warn of a pressure drop abnormality of nitrogen gas.

Next, the equipment operation of the embodiment of FIG. 1 will be described. First, at the time of normal monitoring, the setting of the pump starting pressure switch 13 provided in the pressure tank 12 in the fire extinguishing pipe 5 and the branch pipe 6 which are the primary side of the pre-operation type running water detecting device 8 by the operation of the fire extinguishing pump 1. Fire fighting water at a specified pressure exceeding the pressure is filled under pressure. Also, a nitrogen gas cylinder 20 is provided for the pipe 9 on the secondary side of the pre-operation type running water detecting device 8.
Is supplied to the control valve 22, the flow control valve 23 and the check valve 24.
And the inside of the secondary fire extinguishing pipe 9 is filled with nitrogen gas at a specified pressure.

For this reason, even if there is residual water in the fire extinguishing pipe 9 on the secondary side after draining fire extinguishing water used in, for example, a water pressure test or fire fighting inspection, the filling of nitrogen gas causes corrosion. Since oxygen is excluded, even if there is residual water, corrosion of the pipe 9 does not occur. Also, in the pipe 9 on the secondary side,
Nitrogen gas cylinder 20 for slight nitrogen gas leakage
, The inside of the pipe 9 is filled with a set pressure determined by the regulator 22.

On the other hand, if the sprinkler head 10 is erroneously damaged due to renovation work in a warning area and the nitrogen gas in the fire extinguishing pipe 9 is released, the pressure switch 27 for pressure reduction alarm is activated and the pre-operation valve is activated. The control panel 18 issues a nitrogen gas decompression warning, whereby it is possible to know a nitrogen gas decompression abnormality on the secondary pipe 9 side of the pre-actuated running water detection device 8.

Next, the operation at the time of fire will be described. When a fire occurs in the guard area where the sprinkler head 10 is installed, the fire detectors 15a and 15b operate. When the fire detector 15b operates, the self-fire alarm receiver 16 receives the alarm signal and issues a fire alarm. When the fire detector 15a is activated, the pre-actuation valve control panel 18 receives the alarm signal and controls the opening of the pre-actuation valve provided in the pre-actuation type running water detection device 8.

When the pre-operation valve of the pre-operation type running water detecting device 8 is opened, the pressurized fire-extinguishing water in the branch pipe 6 is discharged to the fire-extinguishing pipe 9 on the secondary side.
Flow into Due to the flow of the fire-extinguishing water into the fire-extinguishing pipe 9 on the secondary side, the pressure in the branch pipe 6 on the primary side and the fire-extinguishing pipe 5 on the primary side of the pre-actuated running water detector 8 are reduced, and the pressure tank 1
The pump start pressure switch 13 provided in 2 is operated.

A signal by the operation of the pump start-up pressure switch 13 is given to the pump control panel 3, and the pump control panel 3 starts the motor 2 to start the operation of the fire pump 1. Thereby, the pressurized fire extinguishing water is supplied to the fire extinguishing pipe 5 and the branch pipe 6.
From the pre-operation type running water detection device 8 in the open state to the fire extinguishing pipe 9 on the secondary side. At this time, when the sprinkler head 10 is not yet operated, the nitrogen gas is pressurized in the fire-extinguishing pipe 9 by the fire-extinguishing water to be sent.

Next, when the sprinkler head 10 is operated by receiving heat from a fire, nitrogen gas is first released from the activated sprinkler head 10, and when the nitrogen gas is completely discharged, the fire pump 1 is pressurized and supplied. The discharge of fire extinguishing water is started, and the fire is extinguished. Until the fire extinguishing water is discharged by the operation of the sprinkler head 10, nitrogen gas as a fire extinguishing gas is released, thereby suppressing the spread of indoor fires. Switching to the discharge of irrigation water can extinguish fires more efficiently.

FIG. 2 shows another embodiment of the sprinkler fire extinguishing system according to the present invention, which is similar to the embodiment of FIG. 1 and is intended for a pre-operation type system. When the supply becomes insufficient, backup is performed by supplying compressed air from the compressor. In FIG. 2, in addition to the nitrogen gas cylinder 20 provided as a fire extinguishing gas filling device, a compressor 28 is further provided in this embodiment. An air pipe 29 from the compressor 28 is connected to a secondary side of a regulator 22 provided in the gas pipe 21 on the nitrogen gas cylinder 20 side via an air dryer 30, an air filter 31, and a regulator 32.

Here, the set pressure P1 of the regulator 22 provided on the nitrogen gas cylinder 20 side is set to, for example, P1 = 3.0 kgf.
/ Cm ² , regulator 3 provided on the compressor 28 side
The set pressure P2 of 2 is a standard set pressure on the secondary side of the pre-operation type equipment, for example, P2 = 2.5 kgf / cm ^{2. By} setting the set pressures P1 and P2 in the regulators 22 and 32 in this way, the At time, set pressure P1 = 3.0 kgf / cm ²
The nitrogen gas from the higher nitrogen gas cylinder 20 side is supplied through the gas pipe 21 to the fire extinguishing pipe 9 on the secondary side of the pre-operation type flowing water detection device 8.

At this time, if the filling amount of the nitrogen gas cylinder 20 decreases or the supply of nitrogen gas becomes abnormal and becomes lower than the set pressure P1, this is detected by the operation of the filling amount detecting pressure switch 26. The self-fire alarm receiver 16 displays a pressure reduction warning of the nitrogen gas cylinder 20 to urge the replacement of the nitrogen gas cylinder 20. However, at this time, the supply pressure further decreases due to the failure of the pressure switch 26 for detecting the filling amount or the replacement of the nitrogen cylinder 20 and the set pressure P2 of the regulator 32 on the compressor 28 side becomes lower than 2.5 kgf / cm ^2. In the event that the gas pipe 21
Set pressure P2 of regulator 32 = 2.5 kgf / cm
² to supply compressed air to prevent the filling pressure in the fire extinguishing pipe 9 on the secondary side of the pre-actuated running water detection device 8 from decreasing.

The configuration and functions of the embodiment of FIG. 2 are the same as those of the embodiment of FIG. 1 except that a backup is provided by a compressor 28 in addition to the nitrogen gas cylinder 20. FIG. 3 shows another embodiment of the sprinkler fire extinguishing system of the present invention. In this embodiment, in order to back up the supply of nitrogen gas by a nitrogen gas cylinder,
Further, a nitrogen gas generator serving as a fire extinguishing gas generator is provided.

Referring to FIG. 3, a nitrogen gas cylinder 20 in a fire extinguishing gas supply facility according to this embodiment is as follows.
A compressor 28 and a nitrogen gas generator 34 are provided, and a gas pipe from the nitrogen gas generator 34 is connected to the nitrogen gas cylinder 20.
Is connected to the secondary side of a regulator 22 provided in the gas pipe 21 on the side. The nitrogen gas generator 34 uses the compressed air supplied by the operation of the compressor 28 as a raw material, for example, to separate nitrogen from air by a separation membrane to generate nitrogen gas.

For this reason, when the filling amount of the nitrogen gas in the nitrogen gas cylinder 20 becomes less than a predetermined amount, it becomes impossible to supply a sufficient amount of the nitrogen gas, and when the supply pressure decreases, the nitrogen gas generated by the nitrogen gas generator 34 is reduced. The supply is performed as a backup, and the supply of the nitrogen gas can be reliably backed up until the cylinder replacement is completed when the filling amount of the nitrogen gas cylinder 20 becomes equal to or less than a predetermined amount.

As another usage of the nitrogen gas generator 34, when the sprinkler fire extinguishing equipment is installed, and when the water pressure test and the fire inspection are completed, the nitrogen gas is filled into the empty pipes quickly from the nitrogen gas cylinder 20. May be switched to supply from the nitrogen gas generator 34 to replenish. According to this usage, the nitrogen gas cylinder 20 is prepared only at the time of the water pressure test or the firefighting inspection, and after the water pressure test or the firefighting inspection, it can be connected to the gas pipe 21 to supply the nitrogen gas.

The nitrogen gas generator 34 provided in the embodiment of FIG. 3 is provided as a backup for the nitrogen gas cylinder 20. However, if it takes a long time to fill the nitrogen gas cylinder, the nitrogen gas generator 34 may be used instead of the nitrogen gas cylinder 20. Only the gas generator 34 may be provided. The compressor 28 and the nitrogen gas generator 34 in the embodiment of FIG.
The configuration other than that provided is the same as the embodiment of FIG.

FIG. 4 shows another embodiment of the sprinkler fire extinguishing system according to the present invention, which is similar to the embodiment of FIG. 1 and is intended for a pre-operated type system. When the supply of gas becomes insufficient, backup is performed by supplying nitrogen gas from a spare nitrogen gas cylinder. In FIG. 4, a nitrogen gas cylinder 2 provided as a fire extinguishing gas filling device
In addition to 0, a nitrogen gas reserve cylinder 35 is further provided in this embodiment. The gas pipe from the nitrogen gas reserve cylinder 35 passes through a regulator 36 and an electric valve 37,
It is connected to the gas pipe 21 on the secondary side of the regulator 22.

When the nitrogen gas cylinder 20 is filled below a predetermined amount and a sufficient nitrogen gas cannot be supplied,
A pressure reduction of the filling gas amount is detected by the filling amount detecting pressure switch 26. The gas cylinder switching device 38 controls the opening of the electric valve 37 by receiving a detection signal from the pressure switch 26 for detecting the charged amount. By opening the electric valve 37,
A backup supply of nitrogen gas from the nitrogen gas reserve cylinder 35 is performed. Reference numeral 39 denotes a pressure switch for detecting the filling amount of the nitrogen gas in the nitrogen gas spare cylinder 35 for detecting that the filling amount of the nitrogen gas has decreased to a predetermined pressure. Information receiver 16
Is displayed, and an alarm display for urging replacement of the nitrogen gas reserve cylinder 35 is made.

The configuration of the embodiment shown in FIG. 4 is the same as that of the embodiment shown in FIG. 1 except that a nitrogen gas spare cylinder 35, a regulator 36, an electric valve 37, a gas cylinder switching device 38, and a filling amount detecting pressure switch 39 are provided. It is. Here, in the embodiment of FIGS. 1 to 4, nitrogen gas is used as a fire extinguishing gas, but other inert gases such as carbon dioxide, argon, helium, etc., or a mixture thereof. Gas can also be used.

Although the embodiment of FIGS. 1 to 4 takes a pre-operation type facility as an example, a dry-type running water detection device is provided at the same position as the pre-operation type running water detection device 8 to extinguish fire on the secondary side. The same can be applied to dry equipment in which fire water is not normally put into piping. Further, also for the existing pre-operation type equipment and dry equipment, the nitrogen gas cylinder 20 is connected to the gas pipe 2 in place of the already provided compressor.
1, the present invention can be easily applied to existing equipment. Of course, the existing equipment is equipped with an air compressor,
As in the embodiment of FIG. 2, the nitrogen gas cylinder 20 may be simply provided.

[0039]

As described above, according to the present invention, nitrogen gas is supplied to the fire extinguishing pipe on the secondary side of the flowing water detecting device that does not fill the fire extinguishing water of the sprinkler fire extinguishing equipment such as dry-type equipment or pre-operation type equipment. By filling a fire extinguishing gas such as this, oxygen which causes corrosion of the piping is completely removed from the secondary piping, and even if there is residual water, corrosion in the piping can be prevented.

Further, when the sprinkler head is activated due to the occurrence of a fire, the fire extinguishing gas is blown out into the room, thereby suppressing the spread of the fire in the room until the water is discharged from the fire extinguishing sprinkler head. In addition, running water inspection
The pressure of the fire-extinguishing gas filling the fire-extinguishing pipe on the secondary side of the
If the pressure drops, pressurized air or
Refilling the fire gas reduces the filling pressure in the fire extinguishing pipe
Can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention by taking a pre-actuated facility as an example.

FIG. 2 is an explanatory diagram of another embodiment in which a backup compressor facility is provided in FIG. 1;

FIG. 3 is an explanatory view of another embodiment in which a nitrogen gas generator for backup is provided in FIG. 1;

FIG. 4 is an explanatory view of another embodiment in which a backup nitrogen gas cylinder is provided in FIG. 1;

[Explanation of symbols]

 1: fire pump 2: motor 3: pump control panel 4: water tank 5: fire pipe 6: branch pipe 7: control valve 8: pre-actuated running water detector 9: secondary pipe 10: sprinkler head (closed type) 11: Terminal test valve 12: Pressure tank 13: Pressure switch for starting pump 14: Auxiliary elevated water tank 15a: Fire detector (for pre-operation type equipment) 15b: Fire detector (for self-fire alarm equipment) 16: Self-fire alarm Receiver 17: Pressure switch for running water alarm 18: Pre-actuation valve control panel 19: Priming tank 20: Nitrogen gas cylinder 21: Gas piping 22: Regulator 23: Control valve 24: Flow control valve 25: Check valve 26: Filling amount detection Pressure switch 27: Pressure switch for pressure reduction alarm 28: Compressor 29: Air piping 30: Air dryer 31: Air filter 32: Regulator 34: Nitrogen gas generator

Claims (2)

(57) [Claims] 1. A fire extinguishing pipe from a fire extinguishing pump facility to a caution area via a running water detection device, a closed sprinkler head connected thereto, and a fire extinguishing water filling a fire extinguishing pipe on a primary side of the running water detection device. In sprinkler fire extinguishing equipment, such as dry equipment or pre-operation equipment, which does not fill the secondary fire extinguishing pipe with fire extinguishing water , fire extinguishing gas is supplied to the secondary fire extinguishing pipe of the water flow detection device.
A fire extinguishing gas filling device for supplying and filling is provided, and the fire extinguishing gas filling device includes a gas bottle filled with a fire extinguishing gas.
The fire extinguishing gas filled in the gas cylinder with the flowing water detection device.
A gas pipe supplied to a fire extinguishing pipe on the secondary side of the apparatus, and a pressure of a fire extinguishing gas supplied by the gas pipe to a predetermined value.
Regulator for regulating pressure and pressure of fire extinguishing gas supplied by gas cylinder drop
Then, when a predetermined pressure is reached, pressurized air is supplied to the gas pipe.
Sprinkler fire extinguishing equipment which is characterized that you have a backup supply compressor equipment. 2. A running water detecting device for a fire extinguishing pipe from a fire extinguishing pump facility.
Closed sprinkler by piping to the guard area through a device
Connect the head, fire extinguishing pipe on the primary side of the running water detection device
Fill the fire extinguishing water into the fire extinguishing pipe on the secondary side.
In sprinkler fire extinguishing equipment such as dry equipment and pre-operation equipment , fire extinguishing gas is supplied to the fire extinguishing pipe on the secondary side of the water flow detection device.
A fire extinguishing gas filling device for supplying and filling is provided, wherein the fire extinguishing gas filling device comprises: a gas cylinder filled with a fire extinguishing gas; A regulator that regulates the pressure of the extinguishing gas supplied by the gas pipe to a predetermined value, a spare gas cylinder filled with the extinguishing gas, and the pressure of the extinguishing gas supplied by the gas cylinder decreases.
When a predetermined pressure is reached, the spare gas is supplied to the gas pipe.
Backup supply of fire extinguishing gas filled in the cylinder
Sprinkler fire extinguishing facility is characterized in that a gas cylinder switching device for controlling so.