JPH1170180A - Fixed fire extinguishing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously extinguish fire without restriction in discharging inert gas in finely spraying fire extinguishing through the use of two fluids, fire extinguishing water and inert gas. SOLUTION: An open-type spraying head 1a for converting fire extinguishing water into fine vapor so as to discharge it in accordance with the discharge of inert gas is arranged in a protection section A, a water-system fire extinguishing equipment for supplying fire extinguishing water to the spraying head 1a and a gas cylinder 2 for supplying inert gas which is stored in a high pressure state are provided, the inert gas of the gas cylinder 2 is supplied to the spraying head 1a at the time of fire so as to discharge fire extinguishing water by converting it into fine vapor by a fine spraying control part 4 as a local control board 4 and only fire extinguishing water is discharged from the spraying head 1a after finishing the discharge of inert gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed fire extinguishing system using two fluids for extinguishing fire water by atomizing it with a high-pressure inert gas and discharging it.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional two-fluid fine spray fire extinguishing system for atomizing a fire extinguishing liquid with an inert gas and releasing the same. In FIG. 6, the gas cylinder 100 is filled with an inert gas such as nitrogen gas in a high pressure state.
The water tank 103 stores a fire extinguishing liquid. In the event of a fire, the valve 102 is opened and the inert high-pressure gas in the gas cylinder 100 is supplied to the head 107 installed in the protection section via the gas pipe 101.

At the same time, the valve 106 is opened and the water tank 10 is opened.
The fire extinguishing liquid of No. 3 is pressurized with an inert gas and the valve 105 is opened to supply fire extinguishing water to the head 107 through the water supply pipe 104. Therefore, the head 107 simultaneously receives the supply of the high-pressure inert gas and the fire extinguishing liquid, and atomizes and discharges the fire extinguishing liquid with the release of the inert gas.

[0004]

However, such a conventional two-fluid fine spray fire extinguishing system relies on the high-pressure inert gas filled in a gas cylinder to discharge the fine fire-extinguishing liquid by atomization. The amount of fire extinguishing liquid that can be released is limited by the capacity of the gas cylinder, and there is a possibility that the gas may be exhausted before the fire extinguishing is completed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and relates to a fine spray extinction using two fluids of an inert gas for fire extinguishing water, which is not limited to discharge of an inert gas. An object of the present invention is to provide a fixed fire extinguishing system that can extinguish a fire.

[0006]

In order to achieve this object, the present invention is configured as follows. The fixed fire-extinguishing system of the present invention is provided with a spray head for spraying fire-extinguishing water into the protective compartment by atomizing and releasing the fire-extinguishing water in accordance with the release of the inert gas. A gas storage unit for supplying an inert gas stored in a state, and further supplying an inert gas from the gas storage unit to a spray head in the event of a fire to atomize fire-extinguishing water and discharge the same, thereby releasing the inert gas. After the completion of the above, a fine spray control unit for discharging only the fire extinguishing water from the spray head is provided.

[0007] According to such a fixed fire extinguishing system of the present invention, the use of an inert gas is required only for fine spray extinction in the early stage of the fire, and the storage capacity of the inert gas can be reduced. Further, since the inert gas is not used as a pressurizing source for supplying fire extinguishing water to the head as in the related art, a storage tank and a gas pipe for fire extinguishing water are not required. Furthermore, the amount of gas stored in the gas storage unit is limited, and it is conceivable that the gas may be exhausted before the fire extinguishing is completed due to the release of fine spray, but after that, the fire extinguishing water from the water-based fire extinguishing equipment may be exhausted. Watering by pressurized supply is continuously performed. In other words, when the release of the fire-extinguishing water by atomization by gas release ends, the two-fluid fire extinguishing functioning as a normal sprinkler head is realized, and the fire can be reliably extinguished.

Further, in the existing sprinkler fire extinguishing equipment, the present invention enables simple spraying by two fluids simply by adding a spray head, a gas storage unit and a fine spray control unit to a branch pipe of an arbitrary protection section. It is possible to change to a fixed fire extinguishing system. The spray head is connected to the water supply pipe of water-based fire extinguishing equipment filled with fire-fighting water under pressure, closes the fire extinguishing water and inert gas outlets in a regular monitoring state, and receives fire extinguishing water when it receives hot airflow due to fire. The closed spray head is provided with a thermal operation mechanism for opening the discharge port of the inert gas. If you install this closed spray head,
The fine spray control unit detects the flowing water for fire extinguishing water when the heat-sensitive operation mechanism of the spray head operates in response to the hot air flow of the fire with the flowing water detection device, and operates the gas control valve provided in the gas pipe from the gas storage unit. Let open.

The spray head is connected via a water supply control valve to a water supply pipe of a water-based fire extinguishing system filled with pressurized water for fire extinguishing, and is connected via a gas control valve to a gas pipe from a gas storage unit. Alternatively, an open type spray head in which the fire water and the inert gas discharge ports are always open may be used. When an open type spray head is used, the fine spray control unit opens each of the water supply control valve and the gas control valve when the fire detector detects a fire in the protection section where the spray head is installed. The fire extinguishing water is finely atomized and released with the release of the inert gas under control.

Further, in another embodiment of the present invention, a direct acting type which does not require a control system can be provided. In other words, the spray head is installed in the protection section, closes the fire extinguishing water discharge port and the inert gas discharge port in a regular monitoring state, and turns off the fire extinguishing water and the inert gas discharge port when receiving a hot air flow due to fire. This is a closed spray head that opens and sprays fire-extinguishing water by atomizing it with the release of inert gas, and a water-based fire extinguishing system that supplies fire-extinguishing water to the spray head, and an inert gas stored under high pressure A gas storage unit for directly supplying gas to the spray head in a steady monitoring state to fill and hold the gas;

That is, the closed type spray head receives and holds the pressurized fire extinguishing water filled in the water supply pipe and the high-pressure inert gas filled in the gas pipe in a steady monitoring state.
When the fire extinguishing water and the discharge port of the inert gas are opened by the heat-sensitive operation mechanism in response to the hot air flow of the fire, the fire extinguishing water can be finely atomized and released as the gas is released. The water-based fire extinguishing system of the present invention is a sprinkler fire extinguishing system in which a closed type sprinkler head that opens and receives a hot air flow of a fire is connected to a branch pipe connected to a water main pipe of a fire pump. Connected to branch pipe.

[0012]

FIG. 1 is an explanatory diagram showing an embodiment of a system configuration of a fixed fire extinguishing system according to the present invention.
The case where the present invention is applied to a sprinkler fire extinguishing facility using a closed type sprinkler head as a water diameter fire extinguishing facility is taken as an example. In FIG. 1, the sprinkler fire extinguishing equipment is provided with a motor 7 for a fire extinguishing pump 6, and the control panel 8 starts and stops the motor 7. The suction side of the fire pump 6 is pulled down to the water source water tank 9, and the projecting side is connected to a water supply main pipe 10 arranged in the vertical direction of the building. An elevated water tank 17 installed on a roof or the like is connected to the water supply main pipe 10.

A branch pipe 11 is connected from the water supply main pipe 10 to each floor of the building, and the branch pipe 11 is drawn out to a protection section through a flowing water detecting device 3 provided with an alarm valve 15 and a pressure switch 16. The closed sprinkler head 13 is connected via a branch pipe in the protection compartment. Water supply main 1
The air tank 18 is connected to the
The fire-extinguishing water filled and held in a pressurized state is introduced to compress the internal air, and the pressure of the compressed air is supplied to a pressure switch 19.
Is operated to cause the control panel 8 to start the pump.

Further, a running water detection signal by the pressure switch 16 of the running water detection device 3 provided in the branch pipe 11 is given as a fire detection signal to a fire receiver 20 of a separately installed fire alarm system, and the operation of the closed type sprinkler 13 is performed. To display a fire alarm. Furthermore, running water detection device 3
The running water detection signal from the pressure switch 16 provided to the control panel 8 is also supplied to the control panel 8 so that a fire display or the like can be performed.

The operation of such a sprinkler fire extinguishing system at the time of fire is as follows. When any of the closed-type sprinkler heads 13 installed in the protection compartment is operated by receiving a hot air flow due to a fire, the alarm valve 15 is opened due to a decrease in the pressure in the branch pipe 11 on the secondary side of the alarm valve 15. It operates, and the water pressure in the water supply main pipe 10 decreases with the discharge of water from the sprinkler head 13.

For this reason, the air pressure of the compressed air in the pressure tank 18 is also reduced, the pressure switch 19 is turned on, the motor 7 is started by the control panel 8, and the operation of the fire pump 6 is started. When the alarm valve 15 is opened, the pressure switch 16 is turned on, and a fire alarm can be displayed on the control panel 8 or the fire receiver 20. According to the present invention for such a sprinkler fire extinguishing system, a closed spray head 1a is installed in a protection section A such as a computer room at the end of the branch pipe 11, and the branch pipe 11 is connected to the branch pipe 11 through the flowing water detection device 3. Connected. The closed spray head 1a is provided with a two-fluid discharge structure that receives the simultaneous supply of fire-extinguishing water and high-pressure inert gas, and atomizes and discharges the fire-extinguishing water with the ejection of the high-pressure inert gas.

For this reason, a gas cylinder 2 as a gas storage section is provided for the closed spray head 1a, and the gas cylinder 2 is filled with an inert gas such as nitrogen gas or carbon dioxide gas at a high pressure. A gas pipe 14 is drawn out of the gas cylinder 2, and the gas pipe 14 is provided with an electromagnetic valve 5 as a gas control valve. The gas pipe 14 is connected to the closed spray head 1a.

Further, a local control panel 4 functioning as a fine spray control unit is installed in the protection section A. For the local control panel 4, the flowing water detecting device 3 provided in the branch pipe 11 connected to the closed spray head 1a, and the gas pipe 1
4 is connected to an electromagnetic valve 5. Running water detector 3
Detects the flow of fire-extinguishing water in the branch pipe 11 accompanying the discharge of fire-extinguishing water when the closed spray head 1a receives the hot airflow from the fire and opens, and outputs a running-water detection signal to the local control panel 4. .

The local control panel 4 which has received the flowing water detection signal from the flowing water detecting device 3 opens the solenoid valve 5 to remove the high-pressure inert gas filling the gas cylinder 2 from the gas pipe 14.
Is supplied to the closed spray head 1a. The closed spray head 1a, which has been supplied with the high-pressure inert gas from the gas cylinder 2, supplies the fire-extinguishing water supplied from the branch pipe 11 with the injection of the high-pressure gas to a particle diameter of about several tens μm to several hundred μm. And discharged toward the fire source F.

The amount of the inert gas filled in the gas cylinder is limited, and when the inert gas cannot be released,
Discharge of the fire extinguishing water by the fine atomization by the closed type spray head 1a becomes impossible. During this time, the water supply main pipe 1
0, the pressure in the pipe has decreased, and the operation of the fire extinguishing pump 6 has been started by the activation of the motor 7 by turning on the pressure switch 19 provided in the pressure tank 18. In the same manner as the closed-type sprinkler head 13, the water discharge from the closed-type spray head 1 a containing only fire-extinguishing water is continued to the fire source F.

FIG. 2 is a sectional view of the closed spray head 1a provided in the protection section A of FIG. In FIG. 2, the closed type spray head 1a has a connection screw 22 formed on the upper part of the head main body 21 to be connected to the branch pipe side, and a fire extinguishing water inlet 23 reaching an internal passage is provided at the connection screw 22. The fire extinguishing water discharge port 24 is opened in the lower part. on the other hand,
A gas inlet 25 for introducing an inert high-pressure gas is formed on a side surface of the head main body 21, and a gas outlet 26 is provided at a position adjacent to the lower fire extinguishing water outlet 24 through the internal passage from the gas inlet 25. It is open.

Fire extinguishing water outlet 24 at the bottom of head body 21
The valve body 27 is fixed to the gas discharge port 26 with the support of the glass valve 30 disposed between the support frames 28 extending from the lower part of the head body, and the fire extinguishing water discharge port 24 and the gas discharge port 24 are constantly monitored. Exit 26 is closed.
As is well known, the glass bulb 30 encloses an alcohol-based solution in a glass tube, and the expansion of the injection solution when subjected to a hot air flow caused by a fire destroys the glass tube and causes the valve body 27 to fall off. By doing so, the fire extinguishing water discharge port 24 and the gas discharge port 26 are opened.

FIG. 3 is an explanatory view of the discharge state of the fine spray when the closed spray head 1a of FIG. 2 is opened by receiving a hot air flow caused by a fire. That is, when the glass bulb 30 of FIG. 2 is broken by receiving a hot air flow due to a fire and the valve body 27 falls off, the fire extinguishing water discharge port 24 and the gas discharge port 26 closed by the valve body 27 as shown in FIG. The fire extinguishing water is supplied to the fire extinguishing water inlet 23 and the high-pressure inert gas is supplied to the gas inlet 25 at the same time.
With the injection of the high-pressure inert gas from 6, the fire extinguishing water discharged from the fire extinguishing water discharge port 24 disposed adjacently is scattered by the gas, atomized and discharged.

The supply of the inert gas to the closed spray head 1a is stopped when the gas cylinder 2 shown in FIG. 1 becomes empty. When the supply of the inert gas is stopped, pressurized fire extinguishing water is continuously supplied to the fire extinguishing water inlet 23 from the sprinkler fire extinguishing equipment via the branch pipe 11. The fire extinguishing water is continuously discharged from the fire extinguishing water discharge port 24, and the support frame 28 acts as a deflector in this case to sprinkle the fire extinguishing water.

Next, the operation of the fixed fire extinguishing system of FIG. 1 will be described. When the closed spray head 1a is opened as shown in FIG. 3 by receiving the hot air flow from the fire source F due to the fire in the protection section A, the fire extinguishing water is first blown out. The running water detecting device 3 detects running water in the branch pipe 11 accompanying the jetting of the fire extinguishing water, outputs a running water detection signal to the local control panel 4, and the local control panel 4 opens the solenoid valve 5 provided in the gas cylinder 2 to open. Then, a high-pressure inert gas is supplied from the gas pipe 14 to the closed spray head 1a.

In response to the supply of the inert gas, the closed spray head 1a atomizes the fire extinguishing water with the release of the gas and discharges it to the fire source F. For this reason, the fire source F receives the spray of the finely atomized fire-extinguishing water droplets simultaneously with the inert gas such as nitrogen gas or carbon dioxide gas from the gas cylinder 2, and the cooling and suffocation effect by the inert gas, The fire is efficiently extinguished by the synergistic effect of cooling by evaporation of droplets by the finely atomized fire-extinguishing water and suffocation effect by the evaporated water vapor.

Further, even if the supply of inert gas from the gas cylinder 2 is stopped, the fire pump 6
Pressurized fire extinguishing water is discharged from the closed spray head 1a, so that the fire source F is not completely extinguished by fire extinguishing by the fine atomization of fire extinguishing water by the release of inert gas. Also, the fire can be surely extinguished by discharging fire-extinguishing water after gas release, which is equivalent to that of a normal sprinkler head.

For this reason, the capacity of the gas cylinder 2 for supplying the inert gas is determined by the amount of the fine spray of fire-extinguishing water accompanying the ejection of the inert gas immediately after the closed spray head 1a is opened by the hot air flow of the fire. It is sufficient that the fire can be effectively extinguished by an impulsive jet, so that the gas capacity is not so much required and a small gas cylinder 2 is sufficient. Further, a fine spray fire extinguishing system using a closed spray head 1a, a gas cylinder 2, a flowing water detecting device 3, a local control panel 4 and an electromagnetic valve 5, which is provided in the protection section A, and uses a jet of inert gas, The sprinkler fire extinguishing system can be installed using the branch pipe 11 in the closed type sprinkler extinguishing system as it is. No special remodeling or additional equipment is required on the sprinkler extinguishing system side. However, it can be easily retrofitted.

FIG. 4 shows another embodiment of the fixed fire extinguishing system according to the present invention.
Only the closed spray head 1a and the gas cylinder 2 need to be provided, and as in the embodiment of FIG.
In this embodiment, the running water detecting device 3, the local control panel 4, and the solenoid valve 5 are unnecessary. In FIG.
A closed type spray head 1a is installed in the protection section A, and a branch pipe 11 of a sprinkler fire extinguishing system for supplying fire-extinguishing water is connected to the spray head 1a, and a gas cylinder 2 filled with high-pressure inert gas is simultaneously operated by a manual valve. It is directly connected by the gas pipe 14 via 34.

In the embodiment of FIG. 4, the manual valve 34 provided on the gas pipe 14 from the gas cylinder 2 is opened in the steady monitoring state, and the high-pressure inert gas is supplied to the closed spray head 1a. I do. In addition, since the fire extinguishing water is also charged into the branch pipe 11 under pressure, the water is supplied to the spray head 1a. In response to such supply of pressurized fire extinguishing water and high-pressure inert gas, the closed type spray head 1a has a fire extinguishing water discharge port 24 and a gas discharge port 26 of a valve body 27 formed by a glass valve 30, as shown in FIG. Closed by support, fire water and high pressure inert gas are not released.

When a fire occurs in the protection section A and the closed spray head 1a is opened as shown in FIG. 3 by receiving a hot air flow from the fire source F, the high pressure inert gas is ejected from the gas cylinder 2 as shown in FIG. The fire-extinguishing water pressurized and supplied from the branch pipe 11 is atomized, and the inert gas and the atomized fire-extinguishing water are injected into the fire source F to extinguish the fire efficiently. In particular, in the embodiment of FIG. 4, since the equipment in the protection section A does not have an electrical control mechanism, the configuration becomes simpler and the cost can be reduced.

FIG. 5 shows another embodiment of the fixed fire extinguishing system according to the present invention, which is characterized in that an open spray head is used. In FIG. 5, an open type spray head 1b is installed in the protection section A.
The open type spray head 1b has a structure in which the valve body 27 and the glass valve 30 are removed from the closed type spray head 1a in FIG. 2, for example, and the fire extinguishing water discharge port 24 and the gas discharge port 26 are open in a steady monitoring state. I have.

A branch pipe 11 of the sprinkler fire extinguishing system is connected to the open type spray head 1b via a motor-operated valve 12 as a water supply control valve, and a gas pipe 14 from the gas cylinder 2 is connected to an electromagnetic valve as a gas control valve. It is connected via a valve 5. Further, a fire detector 32 is installed in the protection section A to detect the occurrence of a fire in the protection section A.

The local control panel 4, which functions as a fine spray control section, connects the solenoid valve 5, the motor-operated valve 12, and the fire detector 32, and opens the motor-operated valve 12 when receiving a signal from the fire detector 32. At the same time, the fire extinguishing water is supplied to the open type spray head 1b, and at the same time, the solenoid valve 5 is opened to supply the high pressure inert gas from the gas cylinder 2 to the open type spray head 1b, and the fire extinguishing water is finely sprayed by injection of the high pressure inert gas. The fire is discharged to the fire source F, and the fire can be efficiently extinguished by simultaneous emission of the inert gas and the finely atomized fire water.

In the above embodiment, a spray head for atomizing fire extinguishing water by discharging inert gas is used for a sprinkler fire extinguishing system using a closed sprinkler.
The case of combining a fluid type fine spray fire extinguishing equipment is taken as an example, but other water-based fire extinguishing equipment that pressurizes and supplies fire extinguishing water to sprinkle water include sprinkler fire extinguishing equipment using open sprinkler heads and foam fire extinguishing equipment Needless to say, appropriate fixed fire extinguishing equipment may be used. That is, any equipment type can be used as long as the equipment can pressurize and supply fire extinguishing water to the protection compartment.

[0036]

As described above, according to the present invention, fire-extinguishing water is supplied from a water-based fire extinguishing system to a spray head, and high-pressure inert gas is supplied from a gas storage unit such as a gas cylinder to discharge from the head. The fire extinguishing water is atomized to extinguish the fire, and the fire extinguishing water does not require a dedicated storage tank or pressurized supply with an inert gas. The equipment configuration
It can be easily realized for improving the fire extinguishing performance in a specific protective compartment in a normal sprinkler installation.

Further, the amount of gas stored in the gas storage unit is limited, and it is conceivable that an inert gas may be released before the fire extinguishing is completed due to the release of fire-extinguishing water by atomization accompanying the gas release. However, even if the inert gas disappears, water spraying is continued by pressurized supply of fire-fighting water from the water-based fire-fighting equipment, so if the two-fire extinguishing of the inert gas and the finely atomized fire-fighting water is not possible, The fire can be surely extinguished by spraying fire water.

Furthermore, fire extinguishing with two fluids, which is obtained by atomizing fire-extinguishing water with an inert gas and releasing it, has a very high fire-extinguishing performance, so that the discharge time is short, and therefore a gas for supplying a high-pressure inert gas is required. The capacity of the gas cylinder in the storage section can be small, the equipment configuration is simple, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a fixed fire extinguishing system of the present invention.

FIG. 2 is a cross-sectional view of the closed spray head used in FIG.

FIG. 3 is an explanatory diagram of fine spray discharge when the spray head of FIG. 2 is operated by receiving a hot air flow.

FIG. 4 is an explanatory view of a direct-acting system using the closed spray head of FIG. 2;

FIG. 5 is an explanatory diagram of a system configuration using an open type spray head.

FIG. 6 is an explanatory diagram of a conventional fine spray fire extinguishing system using two fluids.

[Explanation of symbols]

 1a: Closed spray head 1b: Open spray head 2: Gas cylinder (gas storage unit) 3: Running water detection device 4: Local control panel (fine spray control unit) 5: Solenoid valve (gas control valve) 6: Fire pump 7 : Motor 8: Control panel 9: Water source water tank 10: Water supply main pipe 11: Branch pipe 12: Electric valve (water supply control valve) 13: Closed sprinkler head 14: Gas pipe 15: Alarm valve 16, 19: Pressure switch 17: Elevated water tank 18: Air tank 20: Fire receiver 21: Head body 23: Fire extinguishing water inlet 24: Fire extinguishing water outlet 25: Gas inlet 26: Gas outlet 27: Valve body 28: Support frame 30: Glass valve 32 ： Fire detector 34 ： Manual valve

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI B05B 7/26 B05B 7/26

Claims (5)

[Claims] 1. A spray head installed in a protection section and configured to atomize and discharge fire-extinguishing water with the release of an inert gas; a water-based fire extinguishing facility for supplying fire-extinguishing water to the spray head; A gas storage unit that stores the supplied inert gas in a high-pressure state, and supplies the inert gas from the gas storage unit to the spray head in the event of a fire to atomize fire-extinguishing water and discharge the inert gas. And a fine spray control unit for discharging only the fire extinguishing water from the spray head after the end of the process. 2. The fixed fire extinguishing equipment according to claim 1, wherein the spray head is connected to a water supply pipe of the water-based fire extinguishing equipment filled with pressurized fire extinguishing water, and the spray head is connected to the fire extinguishing water in a regular monitoring state. A closed-type spray head having a heat-sensitive operating mechanism for closing the discharge port of the inert gas and opening the discharge port of the fire-extinguishing water and the inert gas when receiving a hot airflow due to a fire, the fine spray control unit Detects the running water of the fire extinguishing water when the heat-sensitive operating mechanism of the spray head operates in response to the hot air flow of the fire by the flowing water detecting device and opens the gas control valve provided in the gas pipe from the gas storage unit. Fixed fire extinguishing system characterized by the above-mentioned. 3. The fixed fire extinguisher according to claim 1, wherein the spray head is connected via a water supply control valve to a water supply pipe of the water-based fire extinguisher filled with fire extinguishing water under pressure. An open-type spray head connected to a gas pipe from the gas storage unit via a gas control valve and having a discharge port for fire-extinguishing water and an inert gas always in an open state, wherein the fine spray control unit detects a fire. When a fire is detected in the protective section where the spray head is installed in the spraying device, the water supply control valve and the gas control valve are each opened to finely spray fire extinguishing water with the release of the inert gas. A fixed fire extinguishing system characterized by discharging. 4. A fire extinguishing water and inert gas discharge port which is installed in a protection section and is closed in a regular monitoring state when a fire extinguishing water discharge port and an inert gas discharge port are closed and receives a hot air flow caused by a fire. An open-type spray head that releases the fire-extinguishing water by atomizing it with the release of the inert gas and releases the fire-extinguishing water; a water-based fire extinguishing facility that supplies the fire-extinguishing water to the spray head; and a high-pressure storage in the spray head. A gas storage unit for directly supplying and filling and holding the inert gas in a steady monitoring state. 5. The fixed fire extinguishing system according to claim 1, wherein the water-based fire extinguishing system receives a hot air flow of a fire in a branch pipe connected to a water supply main pipe of a fire extinguishing pump. A fixed fire extinguishing system, comprising: a sprinkler fire extinguishing system to which a closed sprinkler head that operates to open is connected, wherein the spray head is connected to a branch pipe of the sprinkler head.