JPH0531209A - Automatic fire extinguishing device - Google Patents

Abstract

PURPOSE:To quickly execute the initial fire extinguishment by measuring a temperature of inside surface of a building and its distance by an optical fiber temperature measuring line distributed and provided on the inside surface of the building and a temperature distance measuring circuit and operating a coordinate of the heat center, and turning a water discharge nozzle to the heat center, based on the coordinate, at the time of being above a set temperature. CONSTITUTION:On the inside surface of a building, an optical fiber temperature measuring line 1 consisting of one piece of optical fiber is provided like a lattice. Also, on a ceiling of the building, a conduit pipe is laid and provided, and to its tip, a water discharge nozzle is attached. In such a state, a laser light is emitted into the optical fiber temperature measuring line 1 from a temperature distance measuring circuit 16, and by measuring the time and the reflection quantity of the laser light which reacts and returns, a temperature and a distance are measured. Based on a result of its measurement, a processing circuit 17 draws a constant temperature line chart in the building, and also, operates the heat center coordinate. When a temperature of the heat center becomes a set temperature or above, a control circuit 18 autnates an alarm 20, and also, turns a water discharge nozzle to the heat center by driving a horizontal angle motor 8 and a vertical angel motor 13 and executes water discharge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire extinguishing system for automatically extinguishing a fire generated inside a building at an initial stage.

[0002]

2. Description of the Related Art Conventionally, as an automatic fire extinguishing device for automatically extinguishing a fire that has occurred inside a building in the initial stage, water spouts are provided at fixed intervals on the ceiling of the building,
It is common to attach a temperature fuse that melts due to the heat of a fire to each water spout and to extinguish a fire by sprinkling water from the water spout in which the temperature fuse has melted when a fire occurs.

In addition, an infrared sensor detects the origin of the fire,
Some fire extinguishes by spraying water from a water spout near the fire source.

On the other hand, as an alarm device for notifying the occurrence of a fire, one comprising a heat detector and a smoke detector arranged at a fixed interval on the ceiling of a building, and an alarm device connected to these detectors. Is common.

[0005]

In an automatic fire extinguisher of the type in which a thermal fuse is melted by the heat of a fire and water is sprinkled from a water spout, the water spouts are arranged at fixed intervals on the ceiling. When a fire occurs at a position far from the wall surface or the water spout, it takes time for the thermal fuse to be melted, so that the initial fire extinguishing cannot be started promptly. Further, even if the fire is extinguished at the initial stage, water will continue to be sprinkled until the main spout of the sprinkler is artificially stopped, and there is a risk that the secondary damage due to water will increase.

Further, in the infrared extinguishing type automatic fire extinguisher, since the origin of the fire is directly detected by infrared rays,
There is a high risk of malfunction due to being sensitive to heating appliances, cooking appliances, and candle fire.

On the other hand, in an alarm device in which a heat sensor and a smoke sensor are arranged at regular intervals on the ceiling, fire occurrence information can be captured only at points, and low level information is required to improve the capture performance. It also has a structure for issuing an alarm, and as a result, the frequency of malfunctions increases. In addition, radio noise or electromagnetic induction noise may intrude into the dielectric material such as copper wire used for the alarm signal wiring from the outside to give a false alarm.

[0008]

According to a first aspect of the present invention, there is provided an optical fiber temperature measuring line composed of optical fiber lines dispersedly arranged on an inner surface of a building, and an arbitrary position in the building. A rotatable water discharge nozzle, and a temperature distance measuring circuit that measures the reflection amount and the return time of the laser light that has been emitted and reflected back in the optical fiber temperature measurement line and converted into a distance, A processing circuit that draws an isotherm diagram in the building based on the data from the temperature distance measurement circuit and calculates coordinates of the heat center, and when the temperature of the heat center exceeds a preset temperature, And a control circuit for directing the water discharge nozzle to a position in the building corresponding to the coordinates of the center of heat and for discharging water.

According to a second aspect of the invention, in the first aspect of the invention, an alarm device is provided for issuing an alarm when the temperature of the heat center calculated in the processing circuit exceeds a set temperature.

[0010]

According to the first aspect of the present invention, when a fire occurs in a building in which the optical fiber temperature measuring lines composed of the optical fiber lines are dispersed, the optical fiber temperature measuring lines are scattered by the temperature change due to the fire. Since the reflectance of light changes, the temperature is measured by the temperature distance measuring circuit by measuring the amount of scattered light of the laser light emitted in the optical fiber temperature measuring line. The temperature is measured by the temperature-distance measuring circuit by measuring the return time, and the coordinates of the heat center are detected by performing the calculation based on the data in the processing circuit.
When the temperature of the heat center exceeds the set temperature, the control circuit directs the water discharge nozzle to the position in the building corresponding to the coordinates of the heat center, and then water discharge is started.

According to the second aspect of the invention, when the temperature of the heat center exceeds the set temperature, the alarm is issued by the alarm device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, on the inner surface of the building, optical fiber temperature measuring lines 1 made of a continuous single optical fiber are arranged in a grid pattern, and a water conduit 2 is attached to the ceiling of the building. A support member 3 which is rotatable around the water guide tube 2 in a horizontal plane is attached to the tip end of the water guide tube 2 via a bearing 4. The support member 4 has a tip end portion of the water guide tube 2. A cap 5 that covers the above and rotates integrally with the support member 4 is fixed by a bolt 6. A gear 7 is formed on the outer peripheral portion of the support member 3, and the gear 7 meshes with a gear 10 fixed to a rotary shaft 9 of a horizontal angular motor 8.

A bracket 11 is fixed to the cap 5, and a water discharge nozzle 12 which is rotatable in a vertical plane and a water discharge nozzle 12 are provided at a tip portion of the bracket 11.
And a vertical angle motor 13 for rotating in a vertical plane. In addition, the inside of the water conduit 2 and the water discharge nozzle 12 have a communication port 14 formed in the bracket 11.
The communication port 14 is connected to the electric valve 15
Is provided.

Next, the end portion of the optical fiber temperature measuring line 1 emits a laser beam into the optical fiber temperature measuring line 1 and scatters the scattered laser beam returned in the optical fiber temperature measuring line 1. The temperature and distance measuring circuit 16 is connected to measure the temperature by measuring the amount of reflection, measure the time required for the reflected scattered light to return (return time), and multiply it by the speed of light to convert it into a distance. There is. The temperature distance measuring circuit 16 is an image processing circuit that is a processing circuit that draws an isothermal line in the building based on the temperature and distance data from the temperature distance measuring circuit 16 and calculates the coordinates of the heat center. The circuit 17 is connected. In the image processing circuit 17, the position where the optical fiber temperature measuring line 1 is actually arranged and the optical fiber temperature measuring line 1 are arranged.
Is stored, and an isotherm is drawn based on the stored information and the data from the temperature distance measuring circuit 16, and the coordinates of the heat center are detected.

To the image processing circuit 17, a control circuit 18 for transferring the temperature of the center of heat and the coordinate data is connected. The control circuit 18 is connected to an alarm signal circuit 19 which determines whether the temperature of the heat center exceeds a preset temperature and issues a signal.
An alarm device 20 and an emergency power supply device 21 are connected to 9. Further, the horizontal angle motor 8, the vertical angle motor 13, and the electric valve 15 are connected to the control circuit 18.

In such a structure, when a fire occurs inside the building, the temperature of the optical fiber temperature measuring line 1 rises according to the distance from the fire point, and the temperature inside the optical fiber temperature measuring line 1 increases with this temperature rise. The scattered light of the laser light that passes through increases, and the amount of light reflected and returned by the scattered light increases in proportion to the temperature. Therefore, the temperature can be measured by measuring this amount of light. Further, the distance can be measured by multiplying the return time of the scattered light which is reflected and returned by the speed of light. The temperature and the distance are measured by the temperature distance measuring circuit, and the image processing circuit 17 further performs arithmetic processing based on this data to draw the isotherm a in the building as shown in FIG. The coordinate data of the heat center b and the temperature are detected. Then, the coordinate data of the heat center b and the temperature are transferred to the control circuit 18.

The control circuit 18 determines whether or not the temperature of the heat center b exceeds a preset temperature, and if it exceeds, a signal is transmitted from the alarm transmitting circuit 19, and the alarm transmitting circuit 19 causes the signal to be transmitted. By the control, an alarm is issued from the alarm device 20 and the emergency power supply device 21 is activated to secure the power at the time of power failure. On the other hand, the horizontal angle motor 8 and the vertical angle motor 13 are driven by the control signal from the control circuit 18, and the tip of the water discharge nozzle 12 is directed to the position (fire point) corresponding to the coordinates of the heat center b in the building. . Furthermore, the electric discharge valve 12 is opened by opening the motor-operated valve 15.
Water discharge is started toward the fire point from. When the fire is extinguished and the temperature of the heat center b falls below the set temperature,
The electric valve 15 is closed and the water discharge is stopped.

In this embodiment, the optical fiber temperature measuring line 1 has been described by taking a continuous single line as an example, but a plurality of optical fiber temperature measuring lines are provided to improve reliability. May be. Further, in the present embodiment, the building has been described as an example of one room, but the optical fiber temperature measuring line may be continuously arranged over a plurality of rooms.

In the present embodiment, the optical fiber temperature measuring line 1 is dispersed and arranged in a lattice, but the present invention has been described. However, even in a spiral shape, a meandering shape, or other states, It suffices if they are distributed.

Further, in the present embodiment, one water discharge nozzle 12 has been described as an example, but a plurality of water discharge nozzles may be provided, and the water discharge nozzles may be operated together.

[0021]

As described above, according to the present invention, the temperature inside the building can be monitored by arranging the optical fiber temperature measuring lines in a distributed manner on the inner surface of the building as described above. Fire detection performance can be significantly improved compared to point monitoring in the device, automatic fire extinguishing in the initial stage can be started quickly, and the water spray nozzle can be directed to the fire point to concentrate the sticky water. The fire extinguishing performance can be improved compared to the conventional water sprinkler that sprinkles water from the sprinkler, and when the temperature of the heat center drops below a preset temperature due to extinction, Since the water discharge can be stopped automatically, the secondary damage caused by water can be suppressed as much as possible.Also, the warning from the alarm device is based on the temperature detection using the optical fiber temperature measuring line. Because carried out have, an effect such as can prevent false alarms due to misinformation and radio noise and electromagnetic induction noise due to an alarm system.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing the structure of a water discharge nozzle.

[Explanation of symbols]

1 Optical fiber temperature measuring line 12 Water discharge nozzle 16 Temperature distance measuring circuit 17 Processing circuit 18 Control circuit 20 alarm

Claims (2)

[Claims] 1. An optical fiber temperature measuring line composed of optical fiber lines dispersedly arranged on the inner surface of a building, a water discharge nozzle rotatable to an arbitrary position in the building, and the optical fiber temperature measuring. A temperature distance measuring circuit that measures temperature and distance from a reflection amount and a returning time of laser light that is reflected and returned while emitting a laser light in a line, and based on data from the temperature distance measuring circuit, A processing circuit that draws an isotherm diagram inside a building and calculates the coordinates of the heat center, and the water spray nozzle that corresponds to the coordinates of the heat center when the temperature of the heat center exceeds a preset temperature. An automatic fire extinguisher comprising a control circuit for directing water to a position inside an object and discharging water. 2. The automatic fire extinguisher according to claim 1, further comprising an alarm device for issuing an alarm when the temperature of the heat center calculated in the processing circuit exceeds a set temperature.