JPH0446764Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fire extinguishing nozzle rotating device that allows the direction of water discharge to be controlled by remote control in a plant fireproofing system or the like.

(Prior art) Conventionally, in plant fire prevention equipment and large space fire extinguishing equipment, etc., remotely controllable fire extinguishing nozzles are installed in areas where fire accidents are expected, and when a fire occurs, the fire scene is monitored with a TV camera, etc. The direction of the extinguishing nozzle is controlled by the operator's remote scanning, making it possible to extinguish the fire safely and reliably even if there is a risk of explosion.

Such a remotely controllable fire extinguishing nozzle has a mechanism that rotates the nozzle in the elevation direction (vertical direction) and a mechanism that rotates the nozzle in the azimuth direction (left and right direction), and each rotation mechanism is operated by a motor drive. In order to further detect the rotational position, a position detector is installed that receives rotational transmission through a gear mechanism, and the detection output of the position detector is used to feedback control the motor so that the nozzle points to the commanded position. There is.

(Problem to be solved by the invention) However, in such a conventional fire extinguishing nozzle rotation device, the rotation of the nozzle by each rotation mechanism is detected by a rotary encoder or the like provided externally through a gear mechanism. The rotation transmission mechanism for the position detector becomes complicated, and the rotation transmission mechanism is attached to the outside of the nozzle, which increases the size of the device.Furthermore, this type of nozzle must be installed outdoors. Therefore, the position detection mechanism must have a sufficiently waterproof structure, which is expensive.

(Means for Solving the Problems) The present invention was made in view of these conventional problems, and in order to rotate and detect the position of the nozzle with a simple structure, a joint pipe divided into two is used. The nozzle cylinder is provided at one end so as to be rotatable in the elevation angle direction (vertical direction) using an elevation angle rotation mechanism, and this joint pipe is attached to the support pipe on the fixed side by an azimuth angle rotation mechanism. It is provided so as to be rotatable in the angular direction (left-right direction), and the rotation of each rotating mechanism is directly transmitted to the elevation angle detector and the azimuth angle detector, so that the rotational position can be detected.

(Embodiment) FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 4 is a perspective view thereof.

First, the configuration will be described. Reference numeral 1 denotes a nozzle, which is attached to the distal end side of a joint pipe 2 that is split into two, so as to be rotatable in the elevation angle direction. The elevation angle rotation mechanism for rotating the nozzle 1 in the elevation angle direction is such that the base of the nozzle 1 is screwed into a rotating member 3 having a T-shaped joint structure, and the rotating member 3 has rotating rings 4 on both sides.
a, 4b are fixed by screwing, and the rotary rings 4a, 4b are attached to the bearings 5a, 5b with bolts to the joint tube 2 so as to be rotatable in the elevation angle direction, that is, in the vertical direction. Further, a half-moon-shaped rotating gear 6 for rotating the nozzle 1 in the elevation angle direction is fixed to the rotating member 3, and the rotating gear 6 is rotationally driven by a motor.

In order to detect the rotational position of the nozzle 1 by such an elevation angle rotation mechanism, a rotary encoder 7 as an elevation angle detector is mounted on a mounting base 8 on the right side of the joint pipe 2.
The shaft 9 directly transmits the rotation of the rotating member 3 to the rotary encoder 7. That is, the shaft 9 is connected to the input shaft of the rotary encoder 7 at the right end, and
It is fixed by driving a key pin or the like to a shaft support member 10 which is inserted and fixed between the rotating member 3 and the rotating ring 4a on the left side of the shaft 9.
In addition, since the shaft support member 10 is placed in the flow path for the nozzle 1 as shown in the figure, the second
As shown in the figure, the central bearing part 10a
and the surrounding ring part 10b are connected by three arms 10c, and the shaft support member 10 is connected in the flow path.
Even if it is provided, the flow of fire extinguishing water to the nozzle 1 is not obstructed.

Referring again to FIG. 1, the lower side of the joint tube 2 is rotatably attached to the support tube 11, which is the fixed side.

As an azimuth rotation mechanism that rotatably supports the joint pipe 2 with respect to the support pipe 11, the joint pipe 2 is connected to the upper side of the support pipe 11 via a bearing 12.
It is supported rotatably by fitting the lower side, and the bearing 13 is further fixed from the lower side by tightening bolts. gear 14
The motor rotational force for rotating the nozzle 1 around the azimuth can be transmitted.

In order to detect the rotational position of such an azimuth rotation mechanism, a rotary encoder 15 is mounted as an azimuth angle detector in the hollow part of the joint pipe 2 which is divided into two parts by means of a mounting base 16.
Rotation is transmitted to the shaft 17 by means of a shaft 17. That is, the upper end of the shaft 17 is connected to the input shaft of the rotary encoder 15 provided on the joint pipe 2 side, and the lower side of the shaft 17 is fixed to the shaft support member 18 fixed inside the support pipe 11 by driving a key pin. The azimuth angle of the nozzle 1 is detected by rotating the rotary encoder 15 provided on the joint pipe 2 with the shaft 17 on the fixed side. In addition, since the shaft support member 18 that fixes the shaft 17 to the support pipe 11 is placed in the flow path for the joint pipe 2, the central bearing part 18a and the outer ring part 18b are connected to each other as shown in FIG. book arm 1
8c, so that even if the shaft support member 18 is provided inside the support pipe 11, the flow of fire extinguishing water is not obstructed.

In addition, the parts that transmit rotation to the elevation rotation mechanism, the azimuth rotation mechanism, and the position detector of each rotation mechanism are equipped with O.
A ring 19 is provided to provide a seal.

Next, the rotation of the nozzle and the detection of the rotation position in the above embodiment will be explained.

First, the output shaft (not shown) of the motor is connected to each of the rotation gear 6 attached to the rotation member 3 in the elevation angle rotation mechanism and the rotation gear 14 attached to the joint pipe 2 in the azimuth angle rotation mechanism. They are interlocked and connected.

First, the nozzle 1 is rotated in the elevation angle direction by driving a rotary gear 6 by a motor, and a rotary ring 4a supported by bearings 5a, 5b with the joint pipe 2 on the fixed side.
4b and the rotating member 3 rotate in the elevation angle direction, and since the nozzle 1 is fixed to the rotating member 13 by screwing, the nozzle 1 can be rotated in the elevation angle direction. This movement of the nozzle 1 in the direction of elevation and elevation is transmitted via the shaft 9 of the shaft support member 10 to the rotary encoder 7 attached to the joint pipe 2 on the fixed side.
The rotation of the elevation angle of the nozzle 1 is directly detected.

Next, for rotation in the azimuth direction, when the rotation gear 14 is driven by a motor, the joint pipe 2 is rotated in the azimuth direction, that is, around the axis, with respect to the support pipe 11 on the fixed side, and the nozzle 1 is rotated in a predetermined direction. Can be oriented in a corner position. The detection of the azimuth angle rotation position at this time is possible because the shaft 17 is fixed to the support tube 11 by the shaft support member 18.
The rotary encoder 15 rotates together with the rotation of the joint tube 2 with respect to the rotation angle of the nozzle 1, and the rotation of the nozzle 1 around the azimuth angle can be directly detected.

In this way, the elevation angle and azimuth angle position detectors in the present invention, that is, the rotary encoders 9 and 15
For the shaft support member 10, shaft 9, and shaft support member 18 provided inside the joint pipe 2,
and rotation can be directly transmitted by the shaft 17,
Each rotational position can be detected simply by installing the rotary encoders 7, 15 at predetermined positions on the joint pipe 2.

Incidentally, although the above-mentioned embodiment has explained the rotation control by motor drive, it is of course possible to provide a manual mechanism in which each rotation of the angle of elevation and angle of azimuth is performed by rotating a gear by operating a handle. It is.

(Effect of the invention) As explained above, according to the invention, the nozzle cylinder part can be freely rotated in the elevation angle direction (vertical direction) by the elevation rotation mechanism at one end of the bifurcated joint pipe. At the same time, this joint tube is provided on the fixed side support tube so that it can freely rotate in the azimuth direction (left and right direction) by an azimuth rotation mechanism, and the rotation of each rotation mechanism is directly detected by the elevation angle detector and the azimuth angle detector. Since the rotational position can be detected by transmitting it to the detector, all the transmission mechanisms that transmit the rotation of the nozzle by each rotation mechanism to the position detector are built inside, and the rotation transmission mechanism for position detection is externally installed. Since there is no need to install one, the fire extinguishing nozzle device can be made compact, and since the rotation is directly transmitted by the shaft, the rotation transmission mechanism itself is simple.
Furthermore, position detectors such as rotary encoders are waterproof by themselves, so there is no need for special waterproof construction, and their simple structure makes them easy to handle and inexpensive. You can get the effect that you can.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention, Figs. 2 and 3 are explanatory views showing the shaft support member taken out from Fig. 1, and Fig. 4 is a perspective view of the embodiment of Fig. 1. It is a diagram. 1...Nozzle, 2...Joint pipe, 3...Rotating member, 4a, 4b...Rotating ring, 5a, 5b, 1
3... Bearing, 6, 14... Rotating gear, 7, 15
...Rotary encoder, 8, 16...Mounting stand,
9, 17... Shaft, 10, 18... Shaft support member, 11... Support pipe, 12... Bearing, 19... O ring.

Claims (1)

[Scope of utility model registration request] an elevation rotation mechanism in which a nozzle cylinder part is attached to one end of a bifurcated joint tube so as to be rotatable in an elevation angle direction;
In the fire extinguishing nozzle rotation device provided with an azimuth angle rotation mechanism in which the base of the joint pipe is attached to the fixed side support pipe so as to be rotatable in the azimuth direction, the nozzle rotation by the elevation angle rotation mechanism is provided. An elevation angle detector that directly receives the transmission and detects the rotational position of the nozzle in the elevation direction; and an azimuth detector that directly receives the rotational transmission of the azimuth rotation mechanism and detects the azimuth position of the nozzle cylinder part. A fire extinguishing nozzle rotating device characterized by: