JPH0412149B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention automatically extinguishes a fire when it occurs, stops spraying extinguishing fluid after a predetermined extinguishing time, checks whether the fire has been extinguished, and then restarts the fire. This invention relates to an automatic fire extinguishing system that determines whether or not to automatically extinguish a fire.

[Prior art] This type of conventional automatic fire extinguishing system automatically starts spraying extinguishing fluid when a fire breaks out in a specific room by detecting it with a fire detector, and discharges one shot of extinguishing fluid. After the injection, the fire detector detects the fire again, and if the fire continues, the structure is such that the injection of extinguishing fluid is automatically restarted (Japanese Patent Application Laid-open No.
51-115098).

According to such a structure, when a fire breaks out in a specific room, it is automatically determined whether or not to re-inject the extinguishing fluid, thereby preventing excessive injection of the extinguishing fluid into the room where the fire occurred. There are advantages. Further, when the fire is not extinguished, the extinguishing fluid is automatically injected again, so there is an advantage that fire extinguishing activities can be carried out sufficiently.

[Problems to be Solved by the Invention] However, with this structure, when applied to a building with multiple rooms, when a fire occurs in one room, extinguishing fluid is repeatedly ejected from all rooms. However, there was a problem in that the fire extinguishing fluid caused damage to rooms where no fire occurred.

The object of the present invention is that even in buildings with multiple rooms,
To provide an automatic fire extinguishing device capable of repeatedly extinguishing a fire only in a room where a fire has occurred.

[Means for solving the problems] The structure of the present invention for achieving the above object is as follows:
The present invention will be described with reference to the drawings corresponding to the embodiments, in which a fire extinguishing fluid injector 1, a fire detection means 2 and a control circuit 3 are provided in each room of a building, respectively.
The fire extinguishing fluid injector 1 of each room is connected to a branch pipe 4 dedicated to that room, and each branch pipe 4 is connected to a main pipe 5 via an automatic on-off valve 11 dedicated to that room. The pipe 5 is connected to a pump 8 for pumping out the extinguishing fluid 7 in the extinguishing fluid supply source 6, and the pump 8 is equipped with a motor 9 for driving it.
The motor 9 is provided with a control panel 10 for controlling it, and each control circuit 3 has a control panel 1 that is common to the automatic on-off valve 11 in the same room.
Control lines 12 and 13 for sending control signals are connected to the control circuit 3, and when a fire detection signal is input from the fire detection means 2 in the room, the control circuit 3 sends a control signal to the control panel 10 to control the motor. 9 to start pumping of the extinguishing fluid 7 by the pump 8, and to start measuring the injection time of the extinguishing fluid 7, and after a predetermined extinguishing time, send a valve closing control signal to the automatic on-off valve 11 of the room. At this point, if a fire detection signal is output from the fire detection means 2 of the room, a valve opening control signal is output to the automatic opening/closing valve 11 of that room, and if the fire detection signal is not output, the valve opening control signal of the room is output. It is characterized in that it is configured to issue a valve closing control signal to the automatic opening/closing valve 11.

[Function] In this way, each room is provided with a fire extinguishing fluid injector 1, a fire detection means 2, and a control circuit 3, and each fire extinguishing fluid injector 1 is connected to a branch pipe 4 dedicated to that room. is connected to the main pipe 5 via the automatic on-off valve 11 dedicated to that room, it extinguishes the fire by spraying extinguishing fluid only in the room where the fire occurred for a predetermined period of time, and after that time, it can determine the extinguishing status and re-extinguish the fire. Fire extinguishing activities can be carried out with the judgment of whether or not to carry out fire extinguishing activities. Further, in rooms where no fire has occurred, extinguishing fluid is not spouted, thereby preventing damage caused by the extinguishing fluid.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. As shown in the diagram, fire extinguishing fluid injectors 1 consisting of sprinkler heads are installed on the ceilings of each room of the building.
one or more are installed, and fire detection means 2
and a control circuit 3 are installed. In the case of a fire extinguishing fluid injector 1 made of a wet type sprinkler in which extinguishing fluid is already present in the piping, each is equipped with a fire detection means made of molten metal that melts in the event of a fire and automatically injects extinguishing fluid. . The fire extinguishing fluid injector 1 of each room is connected to a main pipe 5 via a branch pipe 4 dedicated to that room, and the main pipe 5 is connected to a pump 8 that pumps fire extinguishing fluid 7 in a fire extinguishing fluid supply source 6 consisting of a water tank. has been done. The pump 8 is driven by a motor 9, and the motor 9 is controlled by a control panel 10. Each branch pipe 4 is connected to the main pipe 5 via an automatic on-off valve 11 dedicated to that room. Each control circuit 3 includes an automatic open/close valve 1 in the same room.
A control line 12 that sends a control signal to the common control panel 10 and a control line 13 that sends a control signal to the common control panel 10 are connected to each other.

Next, an example of an automatic fire extinguishing method using such an automatic fire extinguishing device will be described. If a fire breaks out in a certain room, the fire sensing means 2 and the fire sensing means (not shown) of the extinguishing fluid injector 1 in that room detect the fire. Normally, the automatic on-off valve 11 is open and on standby. The extinguishing fluid 7 has therefore reached the extinguishing fluid injector 1 . Fire detection means 2
detects a fire and sends a fire detection signal to the control circuit 3, which starts counting the extinguishing time and sends a control signal to the control panel 10 to start the motor 9 and pump 8. Therefore, pump 8
Pumping of the extinguishing fluid 7 by the fire extinguishing fluid 7 is started. Meanwhile, in the room where the fire occurred, extinguishing fluid injector 1
The fire detection means melts and automatically starts spraying the extinguishing fluid 7. When a predetermined time elapses, for example, about 30 seconds after the start of the injection of the extinguishing fluid 7, the control circuit 3 of that room activates the automatic on-off valve 1 of that room.
A valve closing control signal is issued to the room 1 to close the automatic opening/closing valve 11, and the injection of the fire extinguishing fluid 7 from the fire extinguishing fluid injector 1 in that room is forcibly stopped once. At this point, the fire detection means 2 in that room automatically detects whether the fire has been extinguished. If the fire has been extinguished, the automatic on-off valve 11 for that room remains closed. When the fire is not extinguished, the application of the valve opening control signal from the control circuit 3 of that room to the automatic on-off valve 11 of that room is stopped, and the automatic on-off valve 11 is returned to the open state. As a result, the same extinguishing fluid 7 is again injected into the room where the fire is occurring from the extinguishing fluid supply source 6 via the extinguishing fluid injector 1, and from then on the injection will be continuous unless the control panel 10 is controlled by a firefighter. .

Note that in cold regions, etc., the extinguishing fluid in the main pipe 5 and branch pipes 4 may freeze during the winter, so usually the extinguishing fluid 7 is not put in these pipes and they are kept empty, ie, dry. Therefore, in this case, the extinguishing fluid injector 1 may be of the normally open type. When the normally open fire extinguishing fluid injector 1 is used in this way, the automatic opening/closing valve 11 is always closed. When the fire detection means 2 detects a fire, a valve opening control signal is sent from the control circuit 3 of the room to the automatic opening/closing valve 11 of the room to open the valve 11. Then, after a predetermined period of time, it is closed to confirm that the fire has been extinguished.

Note that the extinguishing fluid 7 is not limited to water, but may be other liquids, gases, or the like.

[Effects of the Invention] As explained above, in the automatic fire extinguishing system of the present invention, each room is provided with a fire extinguishing fluid injector, fire detection means,
A control circuit was installed, and each fire extinguishing fluid injector was connected to a branch pipe dedicated to that room, and these branch pipes were connected to the main pipe via an automatic on-off valve dedicated to that room, so that if a fire occurred, Fire extinguishing activities can be carried out that involve extinguishing a fire by spraying extinguishing fluid only in a room for a predetermined period of time, determining the state of the extinguishing after that time, and determining whether to extinguish the fire again. Further, in rooms where no fire has occurred, extinguishing fluid is not ejected, and damage caused by the extinguishing fluid can be prevented. Furthermore, the structure of the present invention can be applied to both a wet type automatic fire extinguishing system in which the main pipe always contains extinguishing fluid, and a dry type automatic fire extinguishing system in which the main pipe is always empty. There are advantages.

[Brief explanation of drawings]

The drawing is a schematic configuration diagram showing an embodiment of an automatic fire extinguishing system according to the present invention. 1... Fire extinguishing fluid injector, 2... Fire detection means,
3... Control circuit, 4... Branch pipe, 5... Main pipe, 6
... Fire extinguishing fluid supply source, 7 ... Fire extinguishing fluid, 8 ... Pump, 10 ... Control panel, 11 ... Automatic opening/closing valve, 1
2, 13...control line.

Claims (1)

[Claims] 1. Each room in the building is provided with a fire extinguishing fluid injector, a fire detection means, and a control circuit, and the fire extinguishing fluid injector in each room is connected to a branch pipe dedicated to that room, and each branch pipe is connected to a branch pipe dedicated to that room. each connected to a mains via an automatic on-off valve dedicated to that room, said mains being connected to a pump for pumping fire extinguishing fluid in a fire extinguishing fluid supply, said pump being provided with a motor for driving said pump; The motor is provided with a control panel for controlling the motor, and each of the control circuits is connected to a control line that sends a control signal to the control panel that is common to the automatic on-off valve in the same room. When a fire detection signal is input from the fire detection means, a control signal is sent to the control panel to start the motor to start pumping the extinguishing fluid by the pump and to start timing the injection time of the extinguishing fluid. After a predetermined extinguishing time, a valve closing control signal is sent to the automatic on-off valve in that room, and if a fire detection signal is output from the fire detection means in that room at this point, the automatic on-off valve in that room is activated. An automatic fire extinguishing system characterized in that it outputs an open control signal, and if the fire detection signal is not output, it outputs a valve close control signal to the automatic open/close valve in the room.