JPH11299919A - Fire extinguishing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pressurize empty piping to discharge unnecessary dust or moisture so as to make a fire extinguishing system normally operable in the event of fire by laying the piping from a fire extinguisher unit to a fire extinguishing nozzle in a fire extinguishing system into empty piping state, and providing a pressurizing mean for pressurizing the inner part of the empty piping. SOLUTION: In a self-type gas station, a plurality of islands 4, 5 provided with oil feeding devices 1, 2 are set, and a plurality of bubble heads SH are arranged on both sides thereof. Each bubble head SH is connected to a plurality of fire extinguisher units 20 through a valve unit 10, and a compressor 70 is connected to a piping between units 20 through a piping 17. In the event of fire, a watchman operates a control board 31 to start the compressor, and operates a pressure switch 28 and a required electric ball valve 10d to pressurize the air in the piping so as to discharge the dust or moisture, the bubble aqueous solution in a tank 25 is discharged to a feeding stop area SAI through each bubble head SH.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fire extinguishing system having a fire extinguishing agent unit and a fire extinguishing nozzle.

[0002]

2. Description of the Related Art Conventionally, for example, at a gas station, a specialized worker guides a car to stop at a refueling stop area near a refueling device to perform refueling. For safety reasons, fires are prevented by measures such as stopping the engine during refueling and smoking cessation. Conventionally, as mentioned above, specialized workers perform refueling work, so there are few work mistakes, and even if a fire occurs during refueling, the worker runs immediately and starts fire fighting activities Therefore, it was sufficient to install a large-sized fire extinguisher, such as a portable type, as fire extinguishing equipment.

[0003] However, in recent years, a self-stand, that is, a fueling station in which a driver himself performs a fueling operation without using a specialized worker for performing a fueling operation has appeared, and the fueling system has been recognized by law. In this self-stand, measures such as stopping the engine or stopping smoking are not enough.Furthermore, a fire caused by carelessness of a driver unfamiliar with refueling work may occur, especially when gasoline leaking from the refueling nozzle falls to the floor. It is expected that accidents that ignite the gasoline will increase.

[0004]

The inventor of the present invention has made the following invention to solve this problem.

A fire extinguishing agent unit for supplying a fire extinguishing agent, a fire extinguishing nozzle for discharging the fire extinguishing agent, a valve unit for selectively supplying the fire extinguishing agent to the fire extinguishing nozzle by branching a pipe from the fire extinguishing agent unit, A fire extinguishing system for a gas station provided with an operation panel for controlling these, wherein a fire extinguishing section of a fire extinguishing nozzle is set on a side of an island where a fueling device is installed.

However, in a fire-extinguishing system provided in a gas station, a fire-extinguishing nozzle is installed in the field. If the discharge port of the fire-extinguishing agent of the fire-extinguishing nozzle is open, water and dust can enter the inside. There is. Therefore, a lid is provided for the discharge port of the fire extinguishing nozzle. At that time, it is necessary to remove the lid when performing the fire extinguishing activity.

The present invention has been made in view of the above circumstances, and has as its object to easily maintain the equipment state of a fire extinguishing system.

[0008]

SUMMARY OF THE INVENTION In view of the above, the present invention relates to a fire extinguishing system including a fire extinguishing agent unit and a fire extinguishing nozzle, wherein a pipe from the extinguishing agent unit to the fire extinguishing nozzle is always empty. It is characterized in that a pressurizing means for pressurizing the inside of the pipe is provided, and the lid of the fire extinguishing nozzle is opened by pressurization by the pressurizing means in the pipe, and in the pipe, Detecting means for detecting the inflow of the fire extinguishing agent based on the activation of the fire extinguishing agent unit is provided, and the detecting means can be operated by pressurization by the pressurizing means in the pipe.

[0009] Therefore, when the inside of the empty pipe can be pressurized, unexpected dust and moisture can be discharged, and when a cover is provided, the cover can be removed and the detection means for detecting the inflow of the fire extinguishing agent is provided. In the meantime, the detection means can be activated on a trial basis, each of which will keep the fire suppression system operating normally in the event of a fire.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In a so-called self-service gas station, a plurality of islands 4 and 5 on which refueling devices 1 and 2 are installed are arranged. The surroundings of the refueling devices 1 and 2 of the islands 4 and 5 are so-called explosion-proof areas. The islands 4 and 5 are hills projecting from the floor surface, and the projecting height is, for example, 10 to 20 cm. A plurality of foam heads SH are provided on both sides of the islands 4 and 5 as fire extinguishing nozzles. In this embodiment, the foam head SH compatible with the fire extinguishing agent is used, but the foam head SH is not necessarily limited to this, and may be any suitable one for the extinguishing agent to be used.

The foam head SH is provided in a refueling stop area SA.
The bubble head SH is arranged in a horizontal direction.
The number, arrangement position, arrangement direction, and the like of are determined as needed. As shown in FIGS. 2 and 3, a cover plate 3 is provided in the pipe recess CP in which the foam head SH is provided.
5 are provided. This cover plate 35 is a horizontal upper surface portion 3
5a and a vertical side surface portion 35b, which are engaged with the side surface and the upper surface of the concave portion CP for piping and are continuous with the side surface and the upper surface of the island 4. The cover plate 35 is provided with an opening WD at a position opposing the foam head SH. The material and shape of the cover plate 35 and the size and shape of the opening WD are related to the release of the medicine from the fire extinguishing nozzle. In this case, the tip of the foam head SH is fitted into the opening WD of the cover plate.

Refueling stop areas SA are formed on both sides of each island 4, and each refueling stop area SA is a fire extinguishing section. This fire extinguishing section is a place where gasoline may leak at the time of refueling, and its range is expanded or reduced as necessary.

Each foam head SH is connected to a fire extinguishing agent unit 20 via a valve unit 10. The valve unit 10 is connected to the fire extinguishing agent unit 20 on its primary side, and the electric ball valves 10 a to 10 b are respectively branched so that the pipe 15 on the primary side branches to a required number for each fire extinguishing section.
d is provided, and the secondary sides of the electric ball valves 10a to 10d are connected to the foam heads SH.

The fire extinguishing agent unit 20 includes a foam aqueous solution tank 25 for storing an aqueous foam solution as a fire extinguishing agent, a nitrogen pressurized container 27 connected to the foam aqueous solution tank 25 via a pressure regulator 26, a tank 25 and a valve unit 10. And a pressure switch 28 provided between the piping 15 and the primary side pipe 15.

A compressor 70 as a pressurizing means is connected to a pipe between the two units 10 and 20 by a pipe 71, and a pipe to each foam head SH is selectively pressurized by the valve unit 10 by the compressor 70. be able to. Each of these units 10, 20, and 70 is controlled by an operation panel 31. This operation panel 31 is provided in an operator room 30 of a building where a supervisor is present.

Next, the operation of the present embodiment will be described.
The driver drives the car 3 to enter the refueling stop area SA1 of the island 4, stops the car 3 and turns off the engine. After that, the driver gets off the car 3 and refuels 1
Remove the oiling nozzle (not shown) locked on the side of
Refuel the gasoline tank of the car 3. At this time, when the gasoline leaking from the refueling nozzle falls into the refueling stop area SA1 and ignites, the driver who notices the monitoring person in the operator room 30 contacts or the monitoring person notices directly.

When the observer operates the operation panel 31 and selects, for example, a section where a fire has occurred among fire extinguishing sections displayed on a display (not shown in detail), the operation panel 31 outputs a signal for extinguishing a fire extinguishing agent. Will do.

First, a start signal is input from the operation panel 31 to the compressor 70 to pressurize the space between the fire extinguishing agent unit 10 and the valve unit 20 via the pipe 71. When the internal pressure increases to some extent, the pressure switch 28 connected to the pipe of the fire extinguishing agent unit 10 is operated, and a detection signal is input to the operation panel 31.

In response to the detection signal, the operation panel 31 outputs an open signal of the electric ball valve 10d corresponding to the fire section of the valve unit 20. Then, the air pressure stored in the pipes to the foam heads SH1 and SH2 flows, and an airflow is generated in the foam heads SH1 and SH2. This air flow can blow off dirt and moisture that have entered the pipe from discharge ports (not shown in detail) of the foam heads SH1 and SH2.

Then, since the pressure in the pipe becomes atmospheric pressure due to the release of air pressure, the operation of the pressure switch 28 is stopped, and the detection signal to the operation panel 31 is stopped. Thereby, the operation panel 31 determines that the path in the pipe is open, outputs a signal to the fire extinguishing agent unit 10, and opens the solenoid S of the nitrogen pressurized container 27. Then, the pressure of the pressurized nitrogen in the nitrogen pressurized container 27 is adjusted by the pressure regulator 26 to push out the aqueous foam solution in the aqueous foam solution tank 25, and the pushed aqueous foam solution operates the pressure switch 28 to operate the operation panel 31. And outputs a start signal.

Then, the foam fire extinguishing liquid is supplied to the foam heads SH1 and SH2, and the fire extinguishing foam is ejected to the refueling stop area SA1 through the opening WD. Therefore, the area S
A1 is covered with a fire extinguishing foam and the fire source is extinguished.

At this time, the foam from the foam head SH is discharged toward the lower part 3 of the automobile 3 and spreads over the entire refueling stop area SA1 regardless of the position of the wheels. At this time, as the properties of the foam, high foaming foam having a large foam volume with respect to the liquid volume may be used, but it is preferable to use a foam having a strong property of forming a curtain on the surface than the foaming ratio. Preferably, the curtain spreads quickly. Therefore, the fire extinguishing efficiency is extremely good, and the initial fire extinguishing becomes easy.

In this embodiment, the bubble heads SH1, SH
The operation of pressurizing the pipes up to 2 when discharging the fire extinguishing agent has been described. However, if the pipes are pressurized for regular inspection, the fire extinguishing agent can be immediately released when the fire extinguishing agent is released in an emergency. An activation signal may be output to the unit 10.

Further, in the above-described embodiment, the same operation can be performed also in the case where a cover for preventing the attachment of dust or the like is provided at the discharge port (not shown in detail) of each of the foam heads SH1 and SH2. . That is, first, the operation panel 31
When the internal pressure is increased to some extent by starting the compressor 70 from the above, the pressure switch 28 of the fire extinguishing agent unit 10 is operated, and a detection signal is input to the operation panel 31. Then, an open signal is output to the valve unit 20. Then, the air pressure stored in the pipes to the foam heads SH1 and SH2 flows and is pressurized, and the internal pressure is reduced by opening the lids of the foam heads SH1 and SH2. And pressure switch 2
8 stops operating, outputs a signal to the fire extinguishing agent unit 10, and foam fire extinguishing liquid is supplied to the foam heads SH1 and SH2,
The fire extinguishing bubbles are blown out and the fire source is extinguished.

Next, another embodiment of the present invention will be described with reference to FIG.
This will be described below. The same components as those in the above embodiment are denoted by the same reference numerals. Similarly to the above embodiment, a plurality of islands 4 and 5 in which the refueling devices 1 and 2 are installed are provided, and a plurality of foam heads SH are provided on both sides of the islands 4 and 5 as fire extinguishing nozzles. This foam head SH is disposed horizontally in the direction of the refueling stop area SA,
Refueling stop areas SA are formed on both sides of each island 4. Each foam head SH is similar to the above embodiment,
It is connected to the fire extinguishing agent unit 20 via the valve unit 10. The valve unit 10 has a primary side connected to the fire extinguishing agent unit 20 and a primary side pipe 15.
The electric ball valves 10a to 10d are provided so that the required number of branches for each fire extinguishing section are provided.
The secondary sides of to 10d are connected to each foam head SH.

The fire extinguishing agent unit 20 includes a foam aqueous solution tank 25, a pressure regulator 26, a nitrogen pressurized container 27, and a pressure switch 28, as in the above embodiment. An automatic shut-off valve 29 that is always open and closes when the primary side is pressurized is provided in the bypass pipe 21 that connects the solenoid S of the container 27 and the pipe to which the pressure switch 28 is connected. The units 10 and 20 are controlled by an operation panel 31. The operation panel 31 is provided in an operator room 30 of a building where a supervisor is present.

Next, the operation of this embodiment will be described. The driver drives the car 3 to enter the refueling stop area SA1 of the island 4, stops the car 3 and turns off the engine. Thereafter, the driver gets off the vehicle 3, removes a fueling nozzle (not shown) locked on a side surface of the fueling device 1, and refuels a gasoline tank of the vehicle 3. At this time, gasoline leaked from the refueling nozzle is
When it falls to A1 and ignites, the driver who noticed the monitoring person in the operator room 30 will contact, or the monitoring person will notice directly.

When the observer operates the operation panel 31, for example, selects a fire-fighting section among fire-extinguishing sections displayed on a display (not shown in detail), the operation panel 31 outputs a signal for extinguishing a fire extinguishing agent. Will do.

First, the fire extinguishing agent unit 1
0 to the solenoid S of the nitrogen pressurized container 27
Release. Then, the fire extinguishing agent unit 1 passes through the bypass pipe 21 through the automatic shutoff valve 29 and through the pipe 71.
0 and the valve unit 20 are pressurized. Then, the operation panel 31 simultaneously outputs an opening signal of the electric ball valve 10d corresponding to the fire section of the valve unit 20, and the air pressure stored in the pipes to the foam heads SH1 and SH2 flows, and the foam head An airflow is generated in SH1 and SH2. The initial high-pressure gas flow of the nitrogen pressurized container 27 can blow off dust and moisture that have entered the piping from discharge ports (not shown in detail) of the foam heads SH1 and SH2.

The automatic shutoff valve 29 shuts off a valve body (not shown in detail) by the air flow from the nitrogen pressurized container 27, and appropriately pressurizes the aqueous foam solution tank 25 via the pressure regulator 26. Here, the pressurization of the foam aqueous solution tank 25 is adjusted by the pressure regulator 26 at the beginning of the opening of the nitrogen pressurized container 27 and then pressurized. Then, the automatic shut-off valve 29 is closed, so that the bypass pipe 21 is shut off, and the tank 2 is connected via the pressure regulator 26.
5 is pressurized and the aqueous foam solution flows out.

Then, the foam fire extinguishing liquid is supplied to the foam heads SH1 and SH2, and the fire extinguishing foam is ejected to the refueling stop area SA1 through the opening WD. Therefore, the area S
A1 is covered with a fire extinguishing foam and the fire source is extinguished. At this time, as in the above embodiment, the foam from the foam head SH is discharged toward the lower part 3 of the automobile 3 and spreads over the entire refueling stop area SA1 regardless of the position of the wheels. At this time, as the properties of the foam, high foaming foam having a large foam volume with respect to the liquid volume may be used, but it is preferable to use a foam having a strong property of forming a curtain on the surface than the foaming ratio. Preferably, the curtain spreads quickly. Therefore, the fire extinguishing efficiency is extremely good, and the initial fire extinguishing becomes easy.

The release of the foam aqueous solution can be confirmed on the operation panel 31 by operating the pressure switch 28 connected to the pipe of the fire extinguishing agent unit 10 to input a detection signal to the operation panel 31.

Further, the automatic shutoff valve 29 may be a valve which closes by pressurizing the secondary side, or may pressurize the valve unit 10 once to open the electric ball valves 10a to 10d. It may be an electric motor-operated valve or a solenoid valve that is timed so that it closes at a predetermined time after opening.

In this embodiment, the bubble heads SH1, SH
Although the operation of pressurizing the pipes up to 2 at the time of discharging the fire extinguishing agent has been described, pressurization may also be performed periodically for inspection.
For example, an automatic shut-off valve 29 is an open / close valve that is always closed, and a normally open open valve is added to the pressure regulator 26, and the normally closed open valve is opened to open a normally open open valve. By closing, all the pressure of the nitrogen pressurized container 27 flows to the foam head side via the bypass pipe 21, and the foam aqueous solution tank 25 is not pressurized. Therefore, after the pipe is pressurized, each of the on-off valves is returned to the original state and the nitrogen pressurized container 27 is replaced, so that the monitoring state can be easily set.

In the above system, only the periphery of each island is shown. However, the entire gas station can be divided into areas, and the valve unit can be further branched to form a fire extinguishing section. Nozzles and conventional systems may be combined to form an overall fire suppression system.

In the above system, the operator room 3
0 is a manual method in which a guard is manually operated with confirmation of ignition, but is monitored by a sensor that detects heat, flame, etc. in each area or a camera device that can be monitored as a whole. It may be an automatic system that is started up and discharges to a required area. Further, switching between manual and automatic may be performed, and switching may be performed depending on the presence or absence of a monitor.

As described above, the fire extinguishing agent unit 20 and the foam head SH serving as a fire extinguishing nozzle are provided, and the pipe from the fire extinguishing agent unit 20 to the foam head SH is always an empty pipe. Compressor 70 is provided as a pressurizing means, and it is possible to discharge unexpected dust and moisture by being able to pressurize the inside of the empty pipe, and when having a lid, the lid can be removed and the inflow of fire extinguishing agent can be prevented. If there is a detecting means for detecting, the detecting means can be operated on a trial basis, and each of these will keep the fire extinguishing system operating normally in the event of a fire.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a system configuration diagram showing another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 refueling device 20 fire extinguishing agent unit 70 compressor SH foam head

Claims (3)

[Claims] 1. A fire-extinguishing system comprising a fire-extinguishing agent unit and a fire-extinguishing nozzle, wherein a pipe from the fire-extinguishing agent unit to the fire-extinguishing nozzle is always empty, and a pressurizing means for pressurizing the inside of the pipe is provided. A fire extinguishing system characterized by having 2. The fire extinguishing nozzle is provided with a lid, and the lid is opened by pressurization by a pressurizing means in the pipe.
Fire extinguishing system. 3. A pipe is provided with a detecting means for detecting an inflow of a fire extinguishing agent based on activation of a fire extinguishing agent unit, and the detecting means can be operated by pressurization by a pressurizing means in the pipe. Item 1. The fire extinguishing system of Item 1.