JPS59203573A - Fire extinguishing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a fire extinguishing system installed in a building.
Unlike conventional sprinkler systems, it uses a commercially available powder fire extinguisher instead of using water as the extinguishing agent and diffuses the powder.It is highly reliable and has low equipment costs.
The present invention also provides a new fire extinguishing method that does not require any trouble in post-extinguishing treatment.

In order to achieve the above object, the present invention releases non-flammable and harmless gas such as air or nitrogen when the temperature sensing element is activated, branches the emitted airflow to a quick-on/off valve, and opens the quick-on/off valve. The dry powder fire extinguisher is configured to eject and diffuse powder extinguishing agent from a nozzle provided near the temperature sensing element through the conduit.

Embodiments of the present invention will be specifically described with reference to the drawings.

Figure 1 shows the layout of its components, where ■ is the temperature sensing element installed on the ceiling, 2 is the extinguishing agent jet nozzle installed next to it, and 3 is the temperature sensing element installed on the ceiling.
is a gas cylinder that serves as the operating source, and is filled with non-flammable and harmless gases such as air, nitrogen, and charcoal gas. 4 is a commercially available dry powder (A B C) fire extinguisher, and 5a and 5b are cylinders 3 and 3. A pipe connecting the temperature sensing element 1, 6 a powder extinguishing agent conduit connecting the fire extinguisher 4 and the nozzle 2, 7 a control panel, 8 a quick opening/closing valve provided at the connection between the jQ conduit and the fire extinguisher 4, 9 is a gas branch pipe that connects the control panel 7 and the quick-open/close valve 8.

Place the above components as desired in the building, open the main valve IO of the cylinder 2, and use the pressure regulating valve 11 to
The gas dropped into the 12th position is sent to the pipe 5a. control panel 7
Then, an additional 2J/cm is generated by the filter regulator 12.
Reduce pressure to level 2. When the start button 13 is pressed, the trachea 5a and 5b are activated.
is connected. As will be described later, the temperature sensing element 1 is closed with a soluble metal, so it supports the pressure of the gas inside the tube 5b. 1
4a-14b are pressure gauges.

In the single-power extinguishing agent system, after confirming that the quick-on/off valve 8 is closed and the main valve 15 is closed, the safety bottle is removed and the main valve 15 is opened.The quick-on/off valve 8 is closed, so no extinguishing agent is spewed out. .

The second is the normal state.

When the fusible metal of the temperature sensing element 1 melts due to a fire, gas flows out. At this time, the needle valve 17 as well as the flow path of the starting push button 13 are opened, and a large amount of gas is released. The pipe line 18a of the needle valve 17 is extended 18b, and negative pressure acts on the pyro valve 19 provided in the branch pipe 9 leading from the filter regulator 12 to the quick-open/close valve 8, and the pipes 5a and 9 are brought into communication. Gas flows from the regulator 12 to the quick-open/close valve 8.

Then, the quick-open/close valve 8 opens, and the powder extinguishing agent in the fire extinguisher 4 is ejected and diffused from the nozzle 2 through the conduit 6 to extinguish the fire.

The tubes 5a and 5b may be made of synthetic resin tubes such as nylon-urethane, so that even if the temperature sensing element 1 should malfunction, the tubes will melt and operate.

Reference numeral 20 indicates a test push button provided on the control panel 7, and when this button is pressed to release the gas that has passed through the starting push button 13, it operates in the same manner as when the temperature sensing element 1 is activated. . In this case, it is possible to close the main valve 15 of the fire extinguisher 4 and test only the opening and closing of the quick-open/close valve 8 to prevent powder from passing through.

Since the present invention has the above configuration, it has the following features.

1) Unlike sprinkler systems, it does not malfunction due to the temperature of the water supply.

2) Since a dry powder extinguishing agent is used, there is no water damage after extinguishing the fire unlike in the case of water.

3) Commercially available fire extinguishers are used.

4) During normal times, there is no dry powder extinguishing agent in the pipes, so there is no risk of solidification.

5) Unlike a sprinkler that performs temperature-sensing operation and water fountain in one device, the temperature-sensing element and the powder nozzle are separate, so there are no restrictions on the design as will be explained later, and each can have sufficient functionality. You can have it.

6) Equipment costs are low because all the valves used can be off-the-shelf products.

Examples of the locations of each component are as follows.

Figures 2 and 3 show the temperature sensing element 1, in which opposing bottom plates 20a and 20b are connected by side plates 21 and 21, and a rust-free material such as brass or stainless steel is formed with a large through hole 22 between both sides. A gas nozzle 23 is fixed to one bottom plate 20a of the main body made of a material, facing toward the other bottom plate 20b, and the rear part of the nozzle 23 is connected to the trachea 5b by a joint 24.

A soluble metal rod 26 is loosely passed through the hole 25 of the other bottom plate 20b, and its tip is brought into contact with the nozzle 23, and the rear end of the soluble metal rod 26 is pushed with a screw 27 screwed into the bottom plate 20b to press the contact surface. Press to close the opening at the tip of the nozzle 23.

The main body is mounted horizontally on the ceiling F with the through hole 23 facing up and down, as shown in FIG. 3, using an appropriate fixture 28.

When the soluble metal rod 26 melts at, for example, 60° C. due to a fire, the gas serving as the operating source is ejected from the small hole at the tip of the nozzle 23, and the extinguishing method is activated as described above.

When the temperature sensing element has the above configuration, the soluble metal rod 2
6 should have a diameter of about 31, for example, and screw 2 into the nozzle 23.
At 7, it is pushed hard. Therefore, unlike when the small fountain hole of the splinter head is plugged with a soluble metal, there is no risk of it falling off due to vibrations such as an earthquake and causing malfunction.

FIG. 4 shows an example of a powder injection nozzle, in which the powder conduit 6
A main body 30 having a hole 29 communicating with the main body 30 and a plurality of injection holes 3
It consists of a branch seat 32 having a diameter of 1, an injection guide cone 33,
The mounting seat 34 integrated with the cone 33 is placed against the lower surface of the ceiling F and fixed with a tightening port 35 or the like. Above members 30, 32, 3
3 is made of rust-free metal.

When the extinguishing agent powder is sent from the conduit 6, it passes through the hole 29 and the hole 29a, which is expanded in the shape of an extension of the cone 33 at the tip of the hole 29,
The cone 33 is spouted from the hole 31 that has the individual parts in the direction of the opening force, and is spread from the end of the cone to extinguish the fire.

The quick-open/close valve 8 is a known normally closed valve that is normally closed by a closing spring, and when the above-mentioned gas is introduced, the piston or valve stem and the ball valve at its lower end are pulled up against the spring and opened. A type quick-open/close valve is used.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of the fire extinguishing system of the present invention, FIG. 2 is a partially vertical front view of a temperature sensing element, FIG. 3 is a cross-sectional plan view thereof, and FIG. 4 is a partially vertical front view of an injection nozzle. ■ is a temperature sensing element, 2 is an injection nozzle, 3 is an operating source gas cylinder, 4 is a powder fire extinguisher, 7 is a control panel, and 8 is a quick opening/closing valve.

Claims (1)

[Claims] (1) By operating the temperature sensing element, a non-flammable and harmless gas is released through the element, and the released airflow is branched to the rapid opening/closing valve f to open the valve, and the dry powder extinguishing agent of the dry powder fire extinguisher is passed through the conduit to the A fire extinguishing method characterized by spraying and dispersing water from a nozzle installed near a temperature sensing element.