JPH0813313B2 - Automatic fire extinguisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) This invention has a large number of nozzles provided in a pipe, and when one nozzle is opened by the heat of a fire to emit a fire extinguishing agent,
The present invention relates to an automatic fire extinguisher that simultaneously emits an extinguishant from other nozzles connected to this pipe.

(Prior Art) In the floating roof tank, since the floating roof moves up and down, there is a gap in the sliding portion around the floating roof. Since a fire is generated from this part, an automatic fire extinguishing system is provided for it.

In a fuel tank of volatile oil such as a floating roof tank, once a fire occurs, the fire immediately spreads. In the device that emits the extinguishing agent only through the piping of the heat-sensing nozzle that has been used for a long time, it is not possible to stop the spread of the fire by emitting the extinguishing agent only to the nozzle that detects the fire. Therefore, recently, a double pipe for heat sensing nozzle and a pipe for radiation of extinguishing agent are provided so that even if one of the heat sensing nozzles senses, all of the extinguishing agent nozzles emit the extinguishing agent to extinguish the fire. .

(Problems to be Solved by the Invention) In the present invention, in a fire such as a volatile fuel tank where the fire spreads quickly, the heat detection sensor and the nozzle of the fire can be used with a single pipe without using the above-mentioned double pipe. This is an automatic fire extinguisher developed based on the new idea of switching between and to emit a fire extinguisher.

(Means for Solving Problems) An automatic fire extinguisher according to the present invention will be described with reference to the drawings of the embodiments.

Plural switching valves 2 are provided in the pipe 1. Reference numeral 8 is a connection port with the pipe 1. Further, the switching valve 2 has a port 3 for connecting the nozzle 6, a port 4 for connecting the heat sensing device 7 and a valve 5 for switching between the ports 3 and 4, and the port 3 is always in the pipe 1. The stored pressure gas closes the valve 5 by pressing it from the back. Further, the valve 5 is provided with a spring 9 for repulsion.

Separately, the pipe 1 is provided with a switching device 11. The extinguishant supply pipe 12 is connected to the switching device 11, and the pipe 1
This is a device that automatically opens the valve to supply the fire extinguishing agent from the pipe 12 to the pipe 1 when the gas pressure in the pipe drops (this device
For 11 see the example below).

(Operation) In the device of the present invention, when a fire occurs in the fire extinguishing target, the heat sensor 7 at the place where the fire is generated senses and opens, and the pressure gas in the pipe 1 escapes from the opened port 4. To do. The valve 5 is moved by the repulsion spring 9 when the gas pressure acting on the back part is reduced, and the port 3 is opened to open the port 4.
Close. Further, due to the decrease of the gas pressure in the pipe 1, the valve 5 is switched from the port 3 to the port 4 in all the other valves 2 as well, and the port 3 of the nozzle 6 is opened. Then, the switching device 11 automatically opens the valve to supply the fire extinguishing agent to the pipe 1, and the fire extinguishing agent is simultaneously emitted from all the nozzles.

By extinguishing the fire extinguishing agent in all the target areas,
Not only extinguish the fire area, but also the fire spread area.

(Example) As shown in Fig. 4, the pipe 1 is piped in an endless ring shape and is used for extinguishing fire around the roof of the floating roof tank. The shape of the pipe is not limited to the endless pipe depending on the object.

The switching device 11 provided at the base of the pipe 1 is a simultaneous open valve specifically described in Utility Model Publication No. 63-48289.

The heat sensor 7 uses, for example, a sprinkler head whose mouth is closed with a hot-melt metal.

If the set screw 10 fills the pipe 1 with gas pressure, the valve 5
It is used when setting to the mouth 3.

(Effects of the Invention) The present invention provides a plurality of switching valves in one pipe, and the switching valve is provided with a nozzle and a heat sensor. When the heat sensor operates in one switching valve, another switching valve operates. Also, since the fire extinguishing agent is emitted all at once, it can be installed in an oil tank, etc. where the fire spreads quickly to ensure the fire is extinguished. Only one pipe is required and the equipment cost is economical.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the switching valve of the present invention. FIG. 2 is a sectional view showing another embodiment of the valve. FIG. 3 is an external front view of the switching valve. FIG. 4 is a piping diagram. 1 ... Piping, 2 ... Switching valve, 5 ... Valve, 11 ...
Switching device

Claims (1)

[Claims] 1. A pipe is provided with a plurality of switching valves, each of which has a nozzle, a port for connecting a heat-sensing device, and a valve for switching between the ports, and the nozzle is always connected. The connection port is closed by the above-mentioned valve due to the gas pressure in the pipes, and the heat-sensing unit of one of the switching valves detects heat and opens, reducing the gas pressure in the pipes, and The valve is switched, the extinguishant is radiated from each nozzle by driving the switching device between the pressure gas and the extinguisher provided separately in the pipe while opening the nozzle, and supplying the extinguishant to the pipe. Automatic fire extinguisher.