JPH06269508A - Powder type fire extinguishing appliance - Google Patents

Abstract

PURPOSE:To emit powder large in gain diameter such as sand being the fire extinguishing agents for a metallic fire, vermiculite, etc., by bending the center of a steel pipe, both whose ends are closed, downward, and attaching a nozzle to the bottom while maintaining it horizontally, and introducing pressure-gas near to both ends of the steel pipe, and then, opening the nozzle so as to eject the powder inside the steel pipe. CONSTITUTION:A steel pipe 1 is maintained horizontally, with its center bent downward, and then both ends are closed with end plates 2 and 2a. A nozzle 2 attached to the bottom of the bend is provided with a valve 4 which opens with pressure. Powder feed ports 5 and 5a placed near the end plates 2 and 2a are provided with pressure introduction parts 6 and 6a, and the pressure introduction parts 6 and 6a are coupled with each other by a conduit 7, and the line is connected to a pressure source. A fixed-pressure operating valve 8 is attached to the feed port 5a, and it is connected to the valve 4 of the nozzle with a conduit 9. The pressure gas introduced into the conduit pipe 7 agitates the powder P inside the steel pipe 1, and when the inside of the steel pipe 1 reaches specified gas pressure, the fixed-pressure operating valve 8 works and sends pressure gas to the valve 4 through the conduit 9, and the valve 4 opens, and the powder inside the pipe is ejected from the nozzle 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder fire extinguishing device, and more particularly to a device for discharging irregularly shaped powder having a relatively large particle size.

[0002]

2. Description of the Related Art Sand and ore grains are used for extinguishing metal fires such as metal fires such as alkylaluminum. These powders have a large particle size and are different from conventional fire extinguishing powders. Could not be sprinkled on the fire department. Therefore, there is no suitable device for emitting this powder.

[0003]

SUMMARY OF THE INVENTION The present invention provides a fixing device for extinguishing a metal fire, which efficiently radiates powder having large grain size and irregular shape as described above.

[0004]

The first aspect of the present invention is to maintain a steel pipe whose both ends are closed horizontally, slacken almost the center of the steel pipe downward, and provide a nozzle at the lower part of the steel pipe near both ends of the steel pipe. The powder fire extinguisher is characterized in that the pressure gas is introduced at a position, the nozzle is opened to reach a predetermined pressure in the steel pipe, and the powder is discharged in the steel pipe.

A second aspect of the invention is the same as the first aspect of the invention described above.
Introducing a pressure gas near both ends of a steel pipe is a powder fire extinguisher characterized in that an introduction pipe hangs down from the gas introduction portion into the steel pipe.

[0006]

[Operation] Fire extinguishing powder is stored in the steel pipe. When a fire occurs at the place where this device is installed, pressure gas is introduced into the steel pipe. When the inside of the steel pipe reaches a predetermined pressure, the nozzle at the bottom of the steel pipe opens, and the powder in the steel pipe is emitted from the nozzle and sprinkled on the fire part to extinguish the fire. At that time, since the central portion of the horizontal steel pipe of the nozzle is slack, the powder collects in this portion during the radiation process and radiates with a small remaining amount.

When a gas introduction part is provided near both closed ends of the steel pipe and pressure gas is introduced into the steel pipe from the gas introduction part, the powder in the steel pipe is agitated by the pressure gas discharged from the gas introduction pipe. At the same time, it is guided to the slack center of the steel pipe and radiated more efficiently.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The steel pipe 1 for explaining the present invention in the embodiment of FIG. 1 has a center sloping downward and is maintained horizontally.
Both ends of the steel pipe 1 are closed by end plates 2 and 2a. A nozzle 3 is provided below the slackened portion.
The nozzle 3 is provided with a valve 4 that opens under pressure. Located near the end plates 2, 2a, respectively, the powder filling port 5,
5a is provided, and pressure introducing portions 6 and 6a are provided at the filling ports 5 and 5a, respectively. The pressure introducing portions 6 and 6a are connected by a conduit 7, and the conduit 7 is further connected to a pressure gas source (N ₂ cylinder). Filling port 5a
Is provided with a constant pressure actuating valve 8 which is connected by a conduit 9 to the valve 4 of the nozzle. The pipe 10 is connected to a steel pipe (not shown) of another device.

When the pressure gas is introduced into the conduit 7, the gas enters the gap of the powder P in the steel pipe 1 from the pressure introducing portions 6, 6a and agitates the powder P. When the pressure in the steel pipe 1 reaches a predetermined gas pressure, the constant pressure actuating valve 8 works to send the pressure gas in the steel pipe 1 to the valve 4 through the conduit 9, and the pressure gas causes the valve 4 to open the nozzle 3 and the inside of the steel pipe 1. The powder in the tube is radiated from the nozzle 3 by the pressurized gas of.

In FIG. 1 of the embodiment, there is another device on the left side, which is connected to the end plate 2 by the end plate 2b. In this case, it is preferable that the end plates 2 and 2b are opened and communicated with each other so that the two devices have the same pressure relatively early.

When the gas introducing pipe 11 is provided in the pressure introducing portions 6 and 6a, the powder P in the steel pipe 1 is sufficiently agitated by the gas introducing pipe and is introduced into the nozzle 3.

Specifically, the device has an overall length of about 1950 mm and a diameter of
In the case of 250 mm, there is a horizontal part of 430 mm on the left and right, and then it is inclined downward toward the center to make a U-shaped slack,
The slack hangs about 150 mm below the horizontal part.
The shape may be V-shaped (preferably at least 100 mm).

According to an experiment, a steel pipe having a volume of 280 liters, a nozzle diameter of 8 mm, and vermiculite (diameter:
1.2 mm to 0.6 mm (including 50%) 240 liter, pressurized gas
In the case of 5 kg (gauge), the remaining time was less than 10% at an irradiation time of 70 seconds.

The powder used in a general powder fire extinguisher is a fine powder having a size of 100 microns or less.

According to the present invention, the apparatus can be easily manufactured by using an easily available steel pipe and joining the slack portion with the curved pipe, and the equipment cost can be provided at low cost. Also, as in the actual example, many devices can be connected in the horizontal direction, so
It can be easily adapted to the situation of the installation site. Since the device can radiate powder with a large particle size, the fire extinguishing work such as sand, vermiculite, etc. was manually put on the metal fire part by using a scoop etc. You can extinguish the fire without any danger.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the device according to the present invention.

Claims (2)

[Claims] 1. A steel pipe whose both ends are closed is maintained horizontally, approximately the center of the steel pipe is slackened downward, and a nozzle is provided at the lower part of the steel pipe, and pressure gas is introduced near both ends of the steel pipe. A powder fire extinguisher, which is characterized in that the powder extinguishes in a steel pipe when the pressure in the steel pipe reaches a predetermined pressure to open the powder. 2. A powder fire extinguisher, which is characterized in that, when introducing pressure gas near both ends of a steel pipe, the introduction pipe hangs down from the gas introducing portion into the steel pipe.