JPS60174161A - Fire extinguishing apparatus - 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 [Technical field to which the invention pertains] The present invention relates to a fire extinguishing system installed in a building or the like for extinguishing a fire in the event of a fire outbreak.

[Prior art and its problems]

For example, in large buildings such as department stores and hotels, sprinklers are installed to prevent fires from becoming a major problem, and they are equipped with sprinklers that automatically spray water to start extinguishing operations as soon as a fire occurs. Almost.

However, in conventional fire extinguishing systems, a fuse or other actuator that melts in the event of a fire is attached to the sprinkler. The gushing water did not stop until the target closed.

As a result, even in cases where the fire was extinguished by sea squirts, water continues to gush out even after the fire is extinguished, and buildings and products continue to be sprayed with water, resulting in water-soaking and widespread staining, causing new water damage. occurs, and water is also wasted.

[Purpose of the invention]

It is an object of the present invention to provide a fire extinguishing system which eliminates the disadvantages of the prior art and, in particular, automatically stops water spraying after a fire has been extinguished, prevents damage caused by water, and is useful for saving water.

[Key points of the invention]

According to the present invention, however, this objective is achieved by providing a valve in the water pipe to the sprinkler which is controlled to open and close by a fire sensor.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the fire extinguishing system of the present invention, and FIG.
The figure is a front view of the same as above, in which 1 is a fire sensor using a temperature sensor that detects temperature and outputs an output signal in accordance with the temperature, 2
indicates a sprinkler, and a plurality of these fire sensors 1 and sprinklers 2 are arranged at appropriate intervals on the ceiling of a building or the like at close range. Each sprinkler 2 may have a valve opening rod such as a fuse, as in conventional sprinklers.

An electromagnetic valve 4 was provided in the middle of the water pipe 3 leading to each sprinkler 2, and the valve 4 was equipped with a control device 6, and the fire sensor 1 was connected to this control device 6.

The control device 6 controls the opening and closing of the valve 4, and has memory and judgment functions as a sequencer using an IC, and receives the temperature detection signal a of each fire sensor 1, and compares it with a predetermined value. According to the result, a valve open signal or a valve close signal C is introduced to the valve 4. Note that these signals a
, b, and c, it is desirable to use electric power lines.

Fire sensor 1 and sprinkler configured as above
2 will be installed on each floor of the building.

Next, to explain the usage and operation, if a fire breaks out and a temperature detection signal a of, for example, 50°C is sent from one of the fire sensors 1 to the control device 6, a valve opening signal from there will be sent to the solenoid valve. 4 and open the valve 4.

If the fire progresses further and the room temperature reaches, for example, 60°C, the valve opening rod of the sprinkler 2 will melt, and the water flowing into the water pipe 3 via the valve 4 will flow into the sprinkler where the valve opening rod has melted. Release from 2. Alternatively, a sprinkler 2 without a valve opening rod may be used so that the sprinkler 2 starts discharging water at the same time as the valve 4 is opened.

Once the fire extinguishing activity has started and the fire has been extinguished, the fire sensor 1 detects a drop in the room temperature, and all the fire sensors 1 output a temperature detection signal a of, for example, 30°C in summer and 20°C in winter. When the controller 6 enters, a valve close signal C from there enters the electromagnetic valve 4 and closes it, stopping water discharge.

In this way, the water discharge from the sprinkler 2 is also stopped at the same time as the fire is extinguished.

If the fire starts to burn again after it has been extinguished, the valve 4 will open again in response to a detection signal from the fire sensor 2, and water will be sprayed again.

The above is all sprinklers installed on one floor.
2 is controlled by one valve 4, but as shown in FIG. 3, in order to further eliminate wasteful water discharge, a sprinkler is installed for each fire sensor 1, 1'. -2 is further divided into appropriate ranges, for example, by room or within a room, and a control device 6.6' and a solenoid valve 4.4' are connected to each fire sensor 1.1" to detect dangerous temperatures. Only the sprinklers 2 around the fire sensor 1 may be operated.

(Effects of the Invention) As described above, the fire extinguishing system of the present invention sprays water from the sprinkler only during a fire, and the water spray stops as soon as the fire is extinguished. It can prevent damage caused by □ and also help conserve water.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the fire extinguishing system of the present invention, and FIG.
The figure is a front view of the same as above, and FIG. 3 is a front view of the second embodiment. 1.11 Fire sensor 2 Sprinkler 3 Water pipe 4.41 Solenoid valve 6.61 Control device applicant Tokyo Tatsuno Co., Ltd. Figure 1 Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A fire extinguishing system characterized by having a valve that is controlled to open and close by a fire sensor installed in the water distribution pipe to the sprinkler.