JPS63212376A - Automatic 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] [Objective of the Invention 1 (Field of Industrial Application) The present invention detects a fire and automatically injects a fire extinguishing agent toward the fire source, thereby preventing the fire from occurring at its initial stage. Related to automatic fire extinguishing equipment that automatically extinguishes fires.

(Prior Art) A general automatic fire extinguishing system uses a pyroelectric element or the like to detect infrared rays emitted by flame from a fire source, as disclosed in, for example, Japanese Unexamined Patent Publication No. 59-2759. The fire detection sensor is configured to drive and scan in the horizontal and vertical directions, detect the position of the fire source by this drive scan, and direct the nozzle toward the fire source to inject extinguishing agent.

(Problems to be Solved by the Invention) Depending on the type of fire, a plurality of fire sources may occur almost simultaneously at separate locations within the same room. However, conventional automatic fire extinguishing systems cannot deal with multiple fire sources, and detect the position of the fire source using the infrared or ultraviolet rays of the first detected flame and inject extinguishing agent only in that direction. Therefore, if the first detected fire source is a small fire source that has spread from another large fire source, initial extinguishing of this small fire source is carried out first, and fires that require initial extinguishing are carried out first. There was a problem in that the fire spread quickly because of the delay in extinguishing the original large fire source, making it impossible to extinguish the fire efficiently.

The present invention has been made based on the above problems, and
The object of the present invention is to provide an automatic fire extinguishing system that can deal with a plurality of fire sources, preferentially extinguishes large fire sources, and efficiently performs fire extinguishing work by delaying the spread of fire as much as possible.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes an angle detection means for detecting the position and range of a fire source by driving and scanning a directional flame detector, and an angle detection means for detecting the position and range of a fire source. a calculation means for determining and comparing the size of the fire source based on the output of the angle detection means, and a control means for preferentially extinguishing the largest fire source based on the result of the calculation means. be.

(Operation) When multiple fire sources are detected, the size of each fire source is compared and extinguishing agent is preferentially injected towards the largest fire source, reducing the spread of the fire. However, by delaying the fire, you can extinguish the fire more efficiently.

(Example) Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

l is a liquid installed indoors or outdoors.

This is a fire extinguishing agent container that stores a fire extinguishing agent such as gas or powder, and the actuating rod 2 of this extinguishing agent container 1 is actuated by a control circuit including a CPU incorporating a predetermined extinguishing program as will be described later. By pushing up, the extinguishing agent is injected from the nozzle 5 at the tip of the delivery pipe 4.

The nozzle 5 is installed at a relatively high location such as on the ceiling or a mounting base in the room, and is connected to the delivery pipe 4 via a drive mechanism 6 so that the spray direction of the nozzle 5 can be set over almost the entire range of the room. has been done. The drive mechanism 6 includes a rotary body 7 that rotatably connects the delivery pipe 4 and the nozzle 5, and a gear 8 that connects the rotary body 7 with the rotary body 7.
．． 8A, a horizontal motor 9 is mounted to rotate the rotating body 7 by a predetermined angle, for example, 180 degrees, which is arbitrarily set depending on the location, and a gear 10. It is composed of a vertical motor 11 that rotates by 90 degrees in the vertical direction via an IOA.

The tip side of the nozzle 5 is provided with a vertical slit and a horizontal slit (not shown) on the front surface to provide directivity, and is driven and scanned while rotating together with the nozzle 5, detecting the infrared or ultraviolet rays of the flame and detecting the fire source. A movable directional flame sensor 12 is fixed to detect the position and output a position signal.

Reference numeral 13 is a smoke detector that detects smoke, and 14 is a flame sensor that detects flame similarly to the directional flame sensor 12 described above. These smoke detectors 13 and flame detectors 14 are fixedly installed at relatively high places such as the ceiling of the room, and the flame detectors 14 can detect the occurrence of flames at the initial staircase of a fire in almost the entire range of the room. These smoke detectors 13 and flame detectors 14 constitute a fixed type sensor group 15 that detects the initial stage of an indoor fire.

Reference numeral 16 denotes a control circuit which receives fire detection signals from the sensor group 15, and determines that a fire has occurred when both of the sensors 13 and 14 output fire detection signals. When the control circuit 16 determines that a fire has occurred, it activates the alarm 17, and also rotates the drive mechanism 6 horizontally and vertically via the drive circuit 18 to drive and scan in all directions in the room. The location of the fire source is detected by

The control circuit 16 drives the vertical motor 11 to set the directional flame detector 12 at a predetermined upward angle ψ, and then drives the horizontal motor 9.
The flame detector 12 is driven and scanned in the horizontal direction to detect one or more fire sources, and for each fire source, the first detection angle when the flame is first detected and the time when the flame is no longer detected. An angle detection means 19 for detecting a second detection angle of 1, a storage means 20 for storing these detection angles, and a storage means 20 for determining the position and size of each fire source based on these detection angles. a calculation means 21 which detects the detection angle 1), corrects and calculates the absolute size of each fire source based on the upward angle ψ, and compares each; The nozzle control means 22 controls the nozzle 5 to set the injection direction of the nozzle 5 to a fire source of a certain size.

The operation of the present invention configured as described above is illustrated in the flowcharts of FIGS. 3 and 4, and FIG. 5.

This will be explained with reference to the explanatory diagram of FIG.

First, the automatic fire extinguishing system of the present invention uses a fixed type smoke detector 13 that is installed at a relatively high location indoors and covers a wide area.
When a fire detection signal is output from each of the flame detectors 14 and 14, the control circuit 16 determines that a fire has occurred when both fire detection signals are output, and activates the alarm device 17 to detect the occurrence of a fire. The drive mechanism 6 is driven via the drive circuit 18 in order to notify the fire source and determine the position and size of the fire source using the flame detector 12. That is, after initialization,
When a fire detection signal is output from the smoke detector 13 and the flame detector 14 (step 1), the control circuit 16 first moves the pointing direction of the flame detector 12 to an upward angle ψl as shown in FIG. drive the vertical motor 11 (step 2),
In this embodiment, there are two fire sources A.

B exists, fire source A is detected by setting the upward angle ψview, and fire source B is detected by setting the upward angle ψ2. The flame detector 12 has a vertical slit (not shown) on the front surface and detects infrared or ultraviolet rays of a specific frequency emitted from the flame passing through this slit, and its direction is set at an upward angle ψ1, By setting ψ2 and performing each horizontal scan, almost the entire range in the room can be scanned.

When the pointing direction of the flame detector 12 is set to the upward angle ψl,
The control circuit 16 operates the flame detector 12 using the horizontal motor 9 at 180.
The position θA and the size 01' of the fire source A are determined by driving and scanning in the horizontal direction within 0 (step 3). The method of determining the position and size of the fire source A will be explained in detail with reference to FIG. 21) During this scanning, the angle detection means 19 detects the first detection angle 011 at the position where one end of the flame of the fire source A is detected (Step 22), and stores this angle θ11 in the storage means 20 (Step 23). , then step 2 to detect the second detection angle 012 at the position where the other end of the flame is no longer detected.
4), This angle θ12 is stored in the storage means 20 (step 25), and then, based on the stored contents of the storage means 20 (detected angle, etc.), the angle θ12 is stored. The waiting station Oh1 and the width angle of the flame, that is, the size 0
1 (step 26).

θ^=(θ11+012) / 2 +θ+=IO++
-0121 Incidentally, even after detecting the second detection angle θ12, the flame sensor 12 continues to horizontally scan the rotation range, and if another fire source exists, its first and second detection angles are also determined.

Next, when the horizontal scanning at the upward angle ψ1 is completed, the vertical motor 11 is driven and the pointing direction of the flame detector 12 is moved to the upward angle ψ2.Step 4)
6, the center position θB and size θ2 of the fire source B are determined (step 5).

By the way, as shown in Figure 5, fire source A.

Since the magnitudes θ1 and θ2 of B are determined at different upward angles, the magnitude of the farther fire source B is underestimated from the actual magnitude due to the difference in distance from the flame detector 12. In other words, for example, if θ1; θ2, when comparing both fire sources A and B from the same distance, it is actually fire source B.
is a bigger flame. Therefore, in the present invention, the magnitude θ2 of the fire source B detected during the scanning of the upward angle ψ2 is multiplied by a correction constant α determined in advance by calculation or experiment (step 6), and the upward angle ψ1 is By converting to the size at the same distance as the distance of fire source A detected during scanning, the size of fire source A θ1 and the corrected size of fire source B αθ2
This correction constant α is calculated using, for example, the upward angles ψ1 and ψ2 in the vertical direction to calculate the distance from the flame detector 12 to the fire sources A and B (=H/c
osψ1) + fLz (=H/cosψ2) and set α=12/fL1, calculation means 2
After the correction of the size of the fire source B and the comparison of the sizes of the fire sources A and H are completed in step 1, the control means 2
2 is a flame detector 12, for example, if the fire TAA is larger.
is moved to the center position θ^ of the fire source A (step 8), and the flame detector 12 is driven and scanned in the vertical direction (step 9).
, the presence or absence of flame is detected (step 10). When the flame reaches the lower end, the flame is no longer detected, the angle detection means 19 detects the angle of this lower end (step 11), and the control means 22 moves the nozzle 5 to this lower end angle (step 13) to extinguish the flame. The operating rod 2 of the agent container 1 is opened and the extinguishing agent is injected from the nozzle 5 (staple 14).

On the other hand, if it is determined that the fire source B is larger (step 7), the control means 22 moves the flame sensor 12 to the center position θB of the fire source B (step 15). Then, the operations of steps 9 to 14 described above are performed in the same manner.

In this way, even if two fire sources A and B are detected and the distances from the flame detector 12 to each fire source A and B are different, the size of one fire source B can be corrected. The flame detector 12 detects the size θ1 of a nearby fire source A and the size θ of a distant fire source B.
Since the two can be compared as if they were at the same distance, the size of the actual fire source can be accurately determined. Therefore, it is possible to avoid underestimating the size of distant fire sources, select large fire sources that are likely to cause serious damage, and extinguish them with priority, allowing efficient fire extinguishing work. , it becomes possible to quickly and reliably extinguish the initial fire.

Note that there is a limit to the amount of extinguishing agent stored in the extinguishing agent container 1, so it is possible to intensively extinguish the larger fire source, delay the spread of the flames even a little, and report the situation in the meantime. If the extinguishing agent container l is large, the other fire source can also be extinguished. Namely.

As shown in FIG. 7, in step 7 of FIG.
If it is determined that the fire source A is larger, the fire source A is extinguished first in step 31, and after a certain period of time or when the flame of the fire source A is extinguished, the fire source B is extinguished in step 32. ,
If it is determined that fire source B is larger, fire source B is extinguished first in step 33, and after a certain period of time or when the flame of fire source B is extinguished, fire source A is extinguished in step 34. conduct,
In this case, step 34 corresponds to steps 8 to 8 in FIG.
14, step 32.33 includes steps 15.9-
Note that since 01 and 02 are set to zero during initialization, if there is only one fire source, 02 remains zero, and that fire source is selected in step 7.

Although the embodiments of the present invention have been described in detail above, modifications may be made as appropriate within the scope of the gist of the present invention. can also be dealt with,
in this case.

In step 7, the corrected sizes of each fire source are compared, and the fire source with the largest size is selected and extinguished preferentially. Further, the vertical scanning of the flame detector 12 is set at two points at upward angles ψ1 and ψ2.

Three or more points can be set depending on the directional range of the flame detector 12. In that case, the upward angle is ψn (.=1,2.
), then in FIGS. 5 and 6, the distance to each fire source is nL± fLn = H/cos 14In, and the width W is the actual size of each fire source.

is Wn = 2 On ・tarl (On /2
)=2Hatan(on/2)/cos ψ.

(n = 1.2.3...), find the actual fire source size Wn corresponding to multiple fire sources and upward angles, and select the largest fire source among them. The fire can be extinguished preferentially. Furthermore, in the embodiment described above, the size of the fire source is corrected according to the distance from the flame detector 12 and then converted to the size at the same distance for comparison. The size determined by the angle detection means 19 may be compared with the size of the fire source by the calculation means 21.

[Effects of the Invention] As detailed above, according to the present invention, when multiple fire sources are detected, the sizes of each fire source are compared and the fire source with the largest size is preferentially extinguished. By doing so, it is possible to provide an automatic fire extinguishing system that can deal with a plurality of fire sources, preferentially extinguishes large fire sources, delays the spread of fire as much as possible, and performs fire extinguishing work efficiently.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the present invention, Fig. 2 is a block diagram of the control circuit, Figs. 3 and 4 are flowcharts showing the processing operation of the control circuit, and Fig. 5 is the determination of the fire source. FIG. 6 is an explanatory diagram seen from the same plane, and FIG. 7 is a flowchart showing another embodiment. 5. e-nozzle 12. Directional flame detector 1911 - angle detection means 21. Calculation means 22. ψ control means Patent applicant: Hiki Seiki Co., Ltd. agent - Patent attorney Mamoru Ushiki Figure 2, Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] In an automatic fire extinguishing system that detects the position of a fire source by driving and scanning a directional flame sensor, and injecting extinguishing agent from a nozzle toward the fire source, while the flame sensor is driving and scanning, an angle detection means for detecting the position and range of the fire source; a calculation means for determining and comparing the size of the fire source based on the output of the angle detection means when a plurality of fire sources are detected; An automatic fire extinguishing system characterized by comprising: control means for preferentially extinguishing the largest fire source based on the result.