JP3556729B2 - Fire extinguishing nozzle - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a fire extinguishing nozzle used for a fire extinguisher such as a large space fire extinguisher.
[0002]
[Prior art]
Conventionally, fire extinguishing systems in large spaces such as dome stadiums, arenas, exhibition halls, gymnasiums, factories, galleria or atriums are equipped with a water discharge gun (fire extinguishing nozzle) to quickly extinguish a fire that has occurred in the large space. There are things.
A water spray gun extinguishes a fire source by discharging a large amount of water of several hundred liters (for example, 600 liters per minute) to a fire source at a predetermined distance. The nozzle mounting portion is provided rotatably in a vertical direction and a horizontal direction with respect to a preset reference position.
When water is discharged in the event of a fire, for example, the operator moves the nozzle mounting portion vertically and horizontally to adjust the aiming position to the fire source visually or by using a TV camera or the like to fire the nozzle. After turning to the source position, water is discharged by outputting a control signal for starting water discharge.
[0003]
By the way, in such an automatic fire extinguisher, a fire source position is divided and monitored for each predetermined area, and when a fire occurs, water is discharged to an area including the fire source position. Therefore, in order to be able to detect which direction the water gun is currently facing, a detecting means for detecting an elevation angle representing a vertical position and a detecting means for detecting a turning angle representing a horizontal position are provided. Has been devised.
These detecting means control the position of the water spray gun by using an angle detector such as an encoder to determine the amount of movement of the nozzle mounting part which is vertically raised or turned horizontally by the power transmitted from the power source via the transmission mechanism. This is output to a control device that performs the operation, whereby the position control device of the water gun can grasp the aiming position of the water gun, that is, the direction in which the nozzle is facing.
[0004]
[Problems to be solved by the invention]
However, in the position control device of the water gun described above, the aiming position of the water gun (that is, the direction in which the nozzle is facing) is grasped by using an angle detector provided at the nozzle mounting portion of the water gun. Therefore, there is a problem as described below.
That is, an encoder with a high resolution is used as an angle detector for controlling the position of the water gun, and an encoder for raising and lowering the angle in the vertical direction and a turning encoder for detecting the angle in the horizontal direction are usually used. It is composed of two encoders including an encoder. Then, the turning operation of the nozzle in the vertical direction is detected by obtaining the rotation angle of the center axis by the elevation encoder provided on the center axis, and the turning operation of the nozzle in the horizontal direction is The rotation speed of the worm shaft is determined by a turning encoder provided on the worm shaft.
[0005]
That is, no matter how high the accuracy of the encoder itself, if the encoder is installed in the wrong direction when the water spray gun is installed, or if the encoder is mounted with a deviation from the reference, the deviation greatly affects position control. In particular, the horizontal displacement of the water discharge gun is a circumferential movement, and the error increases as the aiming position moves away from the water discharge gun. Therefore, it is necessary to perform position control with high precision.
[0006]
It is an object of the present invention to provide a fire extinguishing nozzle that solves the above-mentioned problems and that performs position control correctly at a preset reference position even when the angle detector is slightly attached.
[0007]
[Means for Solving the Problems]
The configuration of the invention according to claim 1 that solves the above-mentioned problem is as follows.
An angle detecting means for detecting a vertical and turning angle of the nozzles provided horizontally rotatably, and the position control means for controlling the turning angle of the nozzles on the basis of the detected angle data by the angle detection means In a fire-extinguishing nozzle with
At the time of initial setting of the position control means, a storage means for storing angle data of the current position detected by the angle detection means at the reference position of the nozzle as origin data,
A shift at the time of mounting the angle detecting means is corrected by controlling the movement of the nozzle based on the position information corrected by the origin data stored in the storage means.
[0008]
The method of the present invention for controlling the movement of the nozzle based on the position information corrected by the origin data as described above, in addition to controlling the swivel angle, further controls the elevation angle of the nozzle in the vertical direction. May be applied. Further, it is preferable that the angle detecting means is constituted by an encoder provided between the nozzle and the driving source via a coupling serving as a connecting member, as described in claim 2 .
[0010]
[Action]
The elevation angle and the turning angle at the reference position of the nozzle are stored as angle data by the storage means, and the angle data is used as reference data for controlling the nozzle position by the position control means, whereby the relative angle from the reference position is obtained. Data can be obtained easily.
Thus, the angle data at the reference position of the nozzle can be used as an operation reference point for controlling the position of the nozzle.
[0011]
【Example】
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a right side view of a fire extinguishing nozzle (water spray gun) 1 of the present embodiment, and FIG. 2 is a rear view of the fire extinguishing nozzle 1 of the present embodiment.
1 and 2, a nozzle mounting portion 10 is for mounting a nozzle 2 such as a spray nozzle, for example, and is pivotally supported by a water spray gun rotating portion 11. Further, the water spray gun rotating unit 11 is connected to the elevating telescopic unit 13 via a link 12, and the elevating telescopic unit 13 is extended and contracted by a hydraulic motor 14 for elevating the water gun. The nozzle 2 attached to the nozzle attaching portion 10 via the nozzle 12 can be turned in the vertical direction. Further, the water spray gun rotating unit 11 is provided rotatably with respect to the main body base 15, and is rotated by the turning hydraulic motor 16.
[0012]
The rotation of the nozzle mounting unit 10 due to the expansion and contraction operation of the elevating telescopic unit 13 is detected as the number of rotations of the elevating encoder (elevation angle detecting unit) 3. The rotation of 11 is detected as the number of rotations of the turning encoder (turning angle detection unit) 4.
[0013]
FIG. 3 is an enlarged view of a main part of FIG. 1 showing the elevation encoder 3, and FIG. 4 is an enlarged view of a main part of FIG.
As shown in FIG. 3, the elevation encoder 3 is provided on a rotation shaft 10a of the nozzle mounting portion 10 via a coupling (connecting member) 3a, and detects the rotation angle of the rotation shaft 10a to form the nozzle 2 To know the angle of elevation.
On the other hand, as shown in FIG. 4, the turning encoder 4 is provided via a coupling (connecting agent) 4a to the worm shaft 17 associated with the rotation of the turning hydraulic motor 16, and detects the number of rotations of the worm shaft 17. By doing so, the turning angle of the nozzle 2 is known.
Further, a water gun control unit (fire extinguishing nozzle control unit) 6 that performs position control and water discharge control of the water gun 1 includes a memory (storage unit) 5 for storing angle data of the nozzle 2 at a reference position. I have.
[0014]
Since the elevation encoder 3 of the present embodiment is provided on the rotation shaft 10a of the nozzle mounting portion 10 via the coupling 3a, the rotation angle of the rotation shaft 10a is output data of the elevation encoder 3 as it is. Thus, output data corresponding to one rotation of the nozzle mounting part 10 (vertical direction) and one rotation of the elevation encoder 3 can be obtained. On the other hand, since the turning encoder 4 of the present embodiment is provided on the worm shaft 17 via the coupling 4a, the rotation angle of the worm shaft 17 becomes output data of the turning encoder 4 as it is. For example, when the worm shaft 17 is configured to rotate 64 times, the nozzle mounting portion 10 is configured to make one rotation, so that one rotation (horizontal direction) of the nozzle mounting portion 10 corresponds to 64 rotations of the turning encoder 4. Output data can be obtained. Therefore, the mounting of the turning encoder 4 requires higher accuracy than the raising encoder 3.
[0015]
Next, the operation of this embodiment will be described.
First, the nozzle 2 of the water discharge gun 1 is fixed at a position serving as a setting reference. Then, the elevation encoder 3 is attached according to the attachment reference position set on the elevation encoder 3. At this time, since the output data of the elevation encoder 3 directly corresponds to the rotation angle of the rotation shaft 10a, the mounting reference position is set at a position where the pulse output value of the elevation encoder 3 becomes approximately half. Even if the position is slightly deviated, the error of the angle data output from the elevation encoder 3 does not matter much.
[0016]
Next, the turning encoder 4 is mounted according to the mounting reference position set on the turning encoder 4. Since the turning encoder 4 outputs a pulse on the basis of 64 rotations, although the mounting reference position is provided, the accuracy required for the mounting operation is compared with the mounting operation of the above-described elevation encoder 3. If the mounting position is shifted, the output angle data will have a large error. However, here, it is assumed that the mounting is performed with the same displacement as the mounting of the above-described elevation encoder 3.
[0017]
When the attachment work is completed, the water gun control unit 6 is initialized. Specifically, by depressing a switch provided in the water gun control unit 6, the angle data of the current position output from the elevation encoder 3 and the turning encoder 4 at the set reference position of the water gun 1 is used as origin data. After being taken into the memory 5, thereafter, when controlling the position of the water gun by the water gun control unit 6, the elevation control and the turning control are performed based on the origin data taken into the memory 5.
[0018]
That is, when water is discharged based on the occurrence of a fire, the water discharge gun control unit 6 outputs a position control signal to the water discharge gun 1 based on the position information corrected by the origin data by taking a difference, for example. The nozzle 2 is directed to the fire source by controlling the movement of the nozzle mounting portion 10 in the vertical and horizontal directions. Subsequently, a water discharge control signal is output from the water discharge gun control unit 6, and water from the water supply source is sent to the water discharge gun 1 to discharge water to the fire source position.
As described above, in the present embodiment, it is not necessary to use a nerve for mounting the turning encoder 4 as in the conventional mounting operation, and the positional deviation at the time of mounting can be easily corrected.
[0019]
As described above, in this embodiment, the position of the water spray gun control unit 6 based on the output data of the elevation encoder 3 and the turning encoder 4 when the nozzle 2 of the water spray gun 1 is located at the set reference position. The reference point at the time of the control operation can be corrected, and as a result, the position control of the water discharge gun 1 can be performed with high accuracy.
[0020]
In the above embodiment, an example was described in which the rotation ratios of the elevation encoder 3 and the rotation encoder 4 and the axes whose angles were to be detected were set to 1 and 64, respectively. It can be set arbitrarily according to the configuration of the gun 1.
Further, in the above description, the case where the invention made mainly by the inventor is applied to a water spray gun (fire extinguishing nozzle) as a background of use has been described. However, the present invention is not limited thereto. The present invention can be applied to a device in which a rotation angle is accurately detected by angle detection means, such as a turning type fire detection device.
[0021]
【The invention's effect】
As is apparent from the above description, according to the present invention, relative angle data from the reference position can be easily obtained. Can be used as a reference point.
Therefore, even if the mounting angle is incorrectly mounted when mounting the angle detecting means, the displacement at the time of mounting can be corrected, and highly accurate position control can be performed.
[Brief description of the drawings]
FIG. 1 is a right side view of a fire extinguishing nozzle according to an embodiment.
FIG. 2 is a rear view of the fire extinguishing nozzle of the present embodiment.
FIG. 3 is an enlarged view of a main part of FIG. 1 showing an elevation encoder;
FIG. 4 is an enlarged view of a main part of FIG. 1 showing a turning encoder.
[Explanation of symbols]
1 water spray gun (nozzle for fire extinguishing)
2 Nozzle 3 Elevation encoder (elevation angle detector)
4 Rotation encoder (rotation angle detector)
5 memory (storage means)
6 water spray gun control unit (fire extinguishing nozzle control unit)
DESCRIPTION OF SYMBOLS 10 Nozzle attachment part 11 Water spray gun rotation part 12 Link 13 Elevation expansion / contraction part 14 Elevation hydraulic motor 15 Body base 16 Hydraulic motor for rotation

Claims (2)

An angle detecting means for detecting a vertical and turning angle of the nozzles provided horizontally rotatably, and the position control means for controlling the turning angle of the nozzles on the basis of the detected angle data by the angle detection means In a fire-extinguishing nozzle with
At the time of initial setting of the position control means, a storage means for storing angle data of the current position detected by the angle detection means at the reference position of the nozzle as origin data,
A fire extinguishing nozzle , wherein a displacement at the time of mounting the angle detecting means is corrected by performing movement control of the nozzle based on position information corrected based on origin data stored in the storage means. 2. The fire extinguishing nozzle according to claim 1, wherein the angle detecting means is an encoder provided between the nozzle and a driving source via a coupling serving as a connecting member.

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