JP6258098B2 - Injection nozzle - Google Patents

Description

  The present invention relates to a fire-extinguishing jet nozzle capable of switching between foam jetting and liquid jetting. According to this injection nozzle, since an appropriate fire extinguishing method can be selected according to the form of fire, aircraft hangars, waste disposal / recycling facilities, solid fuel storage silos, car carriers, It can be suitably used for a dangerous material silo. Moreover, it can be suitably used by being mounted on a fire truck or a remotely operated unmanned power vehicle, etc., for a combined fire of an oil fire and a general fire assumed in a tank truck accident or a large-scale disaster in an oil complex area.

  Conventionally, fires that can be extinguished with water, such as wood and plastic, have been fire extinguished by liquid jets that spray water or an aqueous solution containing a fire extinguishing agent in liquid form, and oil that cannot be extinguished by water jets. For dangerous goods fires such as fire extinguishing, foam extinguishing is performed by foaming an aqueous solution containing a fire extinguishing agent. However, in the actual fire management area, dangerous and flammable materials are often mixed, and it is necessary to grasp what is burning at the fire site and to select an appropriate fire extinguishing method. For this reason, a fire-extinguishing jet nozzle capable of switching between foam jetting and liquid jetting has been proposed (Patent Documents 1 and 2).

JP 2004-8268 A JP 2005-137742 A

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide an injection nozzle capable of switching between foam injection and liquid injection and capable of appropriate extinguishing according to a fire form. .

The injection nozzle of the present invention includes an inner cylinder and a nozzle portion provided with an outer cylinder disposed outside the inner cylinder,
A liquid flow path that is connected to one end of the nozzle portion and sends a fire extinguishing liquid supplied from the outside into the inner cylinder; and a foam flow path that sends the fire extinguishing liquid between the inner cylinder and the outer cylinder; With a switching mechanism that can be switched,
The bubble flow path is provided with an air intake for foaming the fire extinguishing liquid.

In this injection nozzle, when switching to the liquid flow path for sending the fire extinguishing liquid into the inner cylinder, the fire extinguishing liquid flows from the liquid flow path to one end of the inner cylinder, proceeds in the inner cylinder in the liquid state, and the inner cylinder etc. The liquid is ejected from the end. On the other hand, when fire extinguishing liquid is sent to the bubble channel by the switching mechanism, air flows in from the air intake provided in the bubble channel and foams, and flows between the inner cylinder and the outer cylinder in the foam state. Then injected.
Therefore, according to the injection nozzle of the present invention, the extinguishing liquid supplied from the outside can be sent to the liquid flow path or the foam flow path by the switching mechanism, and the fire extinguishing liquid can be appropriately supplied according to the fire mode. Bubble injection or liquid injection can be performed.

As the switching mechanism in the spray nozzle of the present invention, there are provided a rotating member connected to the nozzle portion and capable of rotating around an axis, and a rotating mechanism for rotating the rotating member. In addition, the rotation member may be provided with a switching channel that can communicate with the bubble channel or the liquid channel depending on the rotation position.
If this is the case, the extinguishing liquid supplied from the outside flows into the bubble channel or the liquid channel by rotating the rotating member by driving the rotating mechanism and changing the position of the switching channel. Or can flow into. For this reason, control of bubble injection and liquid injection can be easily performed by the rotation mechanism.

Further, at the tip of the inner cylinder, a deflector for diffusing the injection direction of the fire extinguishing liquid flowing in the inner cylinder, a nozzle chip in which a gap between the deflector forms a wide-angle channel, and the nozzle chip are surrounded. A movable drum that is arranged close to each other and movable in the longitudinal direction, and a drum moving mechanism that can change the amount of protrusion from the nozzle tip at the tip of the movable drum by moving the movable drum in the longitudinal direction. Can be provided.
In this case, if the movable drum is moved by the drum moving mechanism to increase the amount of protrusion of the movable drum from the nozzle tip, the spraying direction of the fire extinguishing liquid diffused by the nozzle tip and the deflector is moved forward by the movable drum. This is modified to enable more directional low angle injection. Conversely, if the amount of protrusion of the movable drum from the nozzle tip is reduced by the drum moving mechanism, the injection is widened without being corrected by the movable drum in the injection direction of the fire extinguishing liquid diffused by the nozzle tip and the deflector. It becomes an angle. For this reason, by controlling the position of the movable drum, it is possible to appropriately extinguish the fire according to the fire situation.

Furthermore, it is also preferable that an injection direction changing mechanism capable of changing the turning and / or elevation angle of the nozzle portion is provided. If it is like this, since the injection direction from a nozzle part can be changed freely, appropriate fire extinguishing becomes possible according to the position of the fire source in a fire.
It is also preferable that the switching mechanism and / or the injection direction changing mechanism can be remotely operated. If it is like this, the switching control of the foam injection / liquid injection from the injection nozzle and the control of the injection direction can be safely performed at a position away from the fire site.
Furthermore, it is also preferable to control the switching mechanism and / or the injection direction changing mechanism according to preprogrammed contents. If it is like this, an injection nozzle can be appropriately controlled according to the kind and arrangement of dangerous goods etc. in a management fire extinguishing zone.

2 is a partial cross-sectional view of the back surface of the injection nozzle according to the first embodiment. 3 is an exploded perspective view of a switching mechanism 3. FIG. 3 is a schematic plan view of a rotating member 7 and a fixing member 8. FIG. FIG. 3 is an exploded perspective view of a nozzle unit 2. It is a schematic diagram of the fire extinguishing system using the injection nozzle of Example 1. It is a schematic diagram which shows the communication state of the bubble flow path of the switching mechanism 3 in a bubble injection state. It is a schematic cross section which shows the communicating state of the bubble flow path of the nozzle part 2 and the switching mechanism 3 before foam injection. It is a schematic cross section which shows the communication state of the bubble flow path of the nozzle part 2 and the switching mechanism 3 in a foam injection state. It is a schematic diagram which shows the communication state of the liquid flow path of the switching mechanism 3 in a liquid injection state. FIG. 3 is a cross-sectional view illustrating a communication state of liquid passages of a nozzle unit 2 and a switching mechanism 3 before liquid injection. It is sectional drawing which shows the communication state of the liquid flow path of the nozzle part 2 and the switching mechanism 3 in a low angle | corner liquid injection state. It is sectional drawing which shows the communication state of the liquid flow path of the nozzle part 2 and the switching mechanism 3 in a high angle | corner liquid injection state.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.
Example 1
The injection nozzle of Example 1 is an injection nozzle used for extinguishing a fire management area where dangerous materials such as an aircraft hangar and combustible materials are mixed, and as shown in FIG. 1, a supply pipe 1 for supplying a fire extinguishing liquid and A switching mechanism 3 is provided between the supply pipe 1 and the nozzle part 2. An actuator 4 for switching the flow path in the switching mechanism 3 and an actuator 5 for moving the outer cylinder 10 of the nozzle portion 2 back and forth in the axial direction are attached to the switching mechanism 3.

  As shown in FIG. 2, the switching mechanism 3 includes a tubular switching body 6 having a diameter increased on the downstream side, and the switching body 6 is provided with a notch 6 a. A disc-shaped rotating member 7 is rotatably accommodated in the enlarged diameter portion of the switching body 6. The rotating member 7 is provided with circular holes 7a penetrating at four positions orthogonally. Further, the rotating member 7 is attached so that the switching lever 7b protrudes from the notch 6a of the switching body 6 to the outside of the diameter, and the switching lever 7b is attached to the actuator 4 and is rotatable within the notch 6a. (See FIGS. 1 and 2). A fixing member 8 having a substantially circular tube shape and a flange is coaxially fixed to the switching main body 6 on the diameter expansion side of the switching main body 6. The fixing member 8 is provided with four circular holes 8a penetrating at right angles, and on the switching body 6 side of the fixing member 8, there are four circular holes 8a perpendicular to each other at a position of 45 degrees. An oblong hole 8b is provided at a place (see FIGS. 2 and 3). The four oval holes 8b communicate with a central hole 8c provided at the center of the fixing member 8 on the nozzle part 2 side. A cylindrical holder 9 is in contact with the nozzle portion 2 side of the fixing member 8, and the holder 9 is provided with four circular holes 9 a in a four-leaf clover shape at positions aligned with the circular holes 8 a. The diameter of the circular hole 9a is larger than the diameter of the circular hole 8a.

  As shown in FIG. 4, the nozzle unit 2 includes an outer cylinder 10, and an inner cylinder 11 is accommodated in the outer cylinder 10. One end of the inner cylinder 11 is fitted in the central hole 8c of the fixing member 8 shown in FIG. 2, and the other end is fitted in one end of the nozzle chip 12 provided with a plurality of flow paths 12a as shown in FIG. Are combined. The downstream side of the flow path 12a of the nozzle tip 12 is once reduced in diameter and then provided with an enlarged diameter portion 12b, and a deflector 13 whose tip is enlarged in a dish shape is accommodated in the enlarged diameter portion 12b. The rear end of the deflector 13 is fixed to the center of the nozzle tip 12. The nozzle tip 12 is housed in a cylindrical movable drum 14. As shown in FIG. 1, the movable drum 14 is attached to the inside of the outer cylinder 2 via a support frame 14 a provided on the outer peripheral edge of the movable drum 14, and the tip of the movable drum 14 is deflected by the operation of the actuator 5. It is possible to make it a position that protrudes more than 13 or a position that is deeper than the deflector 13.

  As shown in FIG. 5, the supply pipe 1 is provided with a turning motor mechanism 20 that enables the nozzle portion 2 to turn and an elevation angle motor mechanism 21 that can change the elevation angle of the nozzle portion 2. Further, a control panel 22 is installed at a position away from the injection nozzle, and rotation from the encoders 4a, 5a, 20a and 21a provided in the actuator 4, the actuator 5, the turning motor mechanism 20 and the elevation angle motor mechanism 21 is provided. By combining with a processing device (not shown) that receives a pulse signal according to the position and linear motion position and calculates the pulse signal, it is possible to construct an automatic control system that feeds back the calculation results to the actuator and motor operation signals. Yes. A plurality of fire sensors 23 are installed in the fire management area, and a fire signal from the fire sensors 23 is transmitted to the control panel 22.

A method of using the injection nozzle according to the first embodiment configured as described above will be described.
<How to switch between foam injection and liquid injection>
・ Bubble injection When fire extinguishing by foam is appropriate, such as oil fire, perform the following operation for foam injection. That is, the actuator 4 (see FIG. 1) is controlled from the control panel 22, and the circular lever 7a of the rotating member 7 communicates with the circular hole 8a of the fixing member 8 in the switching lever 7b of the rotating member 7 shown in FIG. The position is set (see FIGS. 6 and 7). Then, a pump (not shown) is driven from the control panel 22 to supply the fire extinguishing liquid from the supply pipe 2 (see FIG. 1) to the switching body 6 of the switching mechanism 3. As shown in FIG. 8, the fire extinguishing liquid supplied to the switching body 6 is injected between the outer cylinder 10 and the inner cylinder 11 through the circular hole 7a and the circular hole 8a. Since there is a gap S that communicates with the outside air between the fixing member 8 and the holder 9, this gap S serves as an air intake and air is taken into the fire extinguishing liquid, so that the space between the outer cylinder 10 and the inner cylinder 11 is reduced. Foamed at the tip, and foam is jetted from the tip.
As the fire-extinguishing liquid used for foam injection, an aqueous film foam fire-extinguishing agent or an aqueous solution of protein foam fire-extinguishing agent can be used according to an assumed dangerous material or combustible material.

・ Liquid injection On the other hand, when fire extinguishing liquid injection is appropriate, such as paper, wood, and plastic fires, the operation for liquid injection is performed as follows. That is, the actuator 4 (see FIG. 1) is controlled from the control panel 22 (see FIG. 5), and the switching lever 7b of the turning member 7 shown in FIG. The position is set so as to communicate with the circular hole 8b (see FIGS. 9 and 10). Then, a pump (not shown) is driven from the control panel 22 (see FIG. 5) to supply the fire extinguishing liquid from the supply pipe 2 (see FIG. 1) to the switching body 6 of the switching mechanism 3. As shown in FIG. 11, the fire extinguishing liquid supplied to the switching body 6 flows into the inner cylinder 11 through the circular hole 7a and the circular hole 8b, and further passes through the nozzle tip 12 and collides with the deflector 13. Thereafter, liquid is ejected from the tip of the movable drum 14. Here, the injection direction in the liquid injection can be controlled by the following operation. That is, the actuator 5 shown in FIG. 5 is controlled from the control panel 22 so that the tip positions of the outer cylinder 10 and the movable drum 14 shown in FIG. 1 are positioned to protrude from the deflector 13 (FIG. 1A). . As a result, as shown in FIG. 11, the supplied fire extinguishing liquid is diffused by the collision with the deflector 13, and then the injection direction is corrected forward by the movable drum 14, and low-angle liquid injection is performed. On the other hand, if the tip positions of the outer cylinder 10 and the movable drum 14 are made deeper than the deflector 13 (FIG. 1B), the fire extinguisher diffused by the collision with the deflector 13 as shown in FIG. The liquid is ejected at a wide angle as it is without the ejection direction being restricted by the movable drum 14. Low-angle liquid injection is suitable for distant fires, and wide-angle liquid injection is suitable for immediate fires and wide-area fires. Furthermore, high-angle liquid injection is also suitable as a protective water spray that reduces the radiant heat of a fire. Further, the fire extinguishing liquid may be water or a mixed liquid of an aqueous film foam fire extinguishing agent and water.

<Control of spray nozzle by control panel 22>
The injection nozzle follows a sequencer of the control panel 22 shown in FIG. 5, and according to a predetermined program, its elevation angle, turning angle, distinction between bubble injection or liquid injection, and liquid injection state (level of low angle injection to high angle injection) Can be driven with a predetermined time schedule.
The driving trigger is a fire signal from the fire sensor 23. Also, by identifying the fire sensor that has transmitted the fire signal among the plurality of fire sensors 23, the position of the fire occurrence is grasped, and the fire occurrence source It is also possible to make a program so as to perform an appropriate injection.
It is also possible to replace the plurality of fire sensors 23 with an infrared camera or an infrared array sensor. Thereby, the coordinate information of the fire occurrence position can be grasped more accurately, and a program can be set up to perform more efficient injection.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 11 ... Inner cylinder 10 ... Outer cylinder 2 ... Nozzle part 8b, 8c ... Liquid flow path (8b ... Oval hole, 8c ... Center hole)
8a ... Bubble channel (circular hole)
DESCRIPTION OF SYMBOLS 3 ... Switching mechanism S ... Air intake 7 ... Turning member 4 ... Turning mechanism (actuator)
7a ... Switching channel (circular hole)
DESCRIPTION OF SYMBOLS 12 ... Nozzle tip 13 ... Deflector 14 ... Movable drum 5, 10, 14a ... Drum moving mechanism (5 ... Actuator, 10 ... Outer cylinder, 14a ... Support frame)

Claims (3)

A nozzle portion provided with an inner cylinder and an outer cylinder disposed outside the inner cylinder;
A liquid flow path that is connected to one end of the nozzle portion and sends a fire extinguishing liquid supplied from the outside into the inner cylinder; and a foam flow path that sends the fire extinguishing liquid between the inner cylinder and the outer cylinder; With a switching mechanism that can be switched,
An injection nozzle characterized in that an air intake for foaming a fire extinguishing liquid is provided in the bubble channel. The switching mechanism is provided with a rotation member that is connected to the nozzle portion and is rotatable about an axis, and a rotation mechanism for rotating the rotation member.
2. The injection nozzle according to claim 1, wherein the rotation member is provided with a switching channel that can communicate with the bubble channel or the liquid channel depending on a rotation position.   At the tip of the inner cylinder, a deflector for diffusing the injection direction of the fire extinguishing liquid flowing in the inner cylinder, a nozzle chip in which a gap between the deflector forms a wide-angle flow path, and so as to surround the nozzle chip A movable drum arranged close to the movable drum and movable in the longitudinal direction, and a drum moving mechanism capable of changing the amount of protrusion from the nozzle tip at the tip of the movable drum by moving the movable drum in the longitudinal direction. The injection nozzle according to claim 1 or 2.

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