JP2020059426A - Unmanned flying body - Google Patents

Abstract

To provide an unmanned flying body that allows for ember extinguishing for forest fires with poor workability without using a large-sized heavy fire extinguisher system.SOLUTION: An unmanned flying body 1 includes: multiple rotors 3 rotatably driven by a motor 7; and a foam fire-extinguishing device 10 having a container 30 for storing a solution L containing a foam fire-extinguishing agent, and a foam generating parts 12, 13, 14, 15 for generating fire-extinguishing foam F from the solution L that is stored in the container 30. The fire extinguishing device 10 is disposed below the rotors 3 to supply the fire-extinguishing foam F generated by the foam generating parts 12, 13, 14, 15 to a site to be subjected to ember extinguishing in a dropping manner.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an unmanned air vehicle equipped with a foam fire extinguisher.

  There is a fire extinguisher (backpack type fire blister) in which a firefighter carries a bag containing water for extinguishing his back and discharges the water in the bag with a hand pump to extinguish the fire (see, for example, Patent Document 1). Although the fire extinguisher is widely used for afterglow treatment in forest fires, house fires, factory fires, etc., the amount of water that can be carried on the back is limited, and the fire extinguishing ability is not necessarily large. In the afterglow treatment of forest fires, a firefighter must carry a fire extinguisher on his back, climb a steep slope, and move to the site where the afterglow treatment should be performed.

  On the other hand, in recent years, fire extinguishing activities using fire extinguishing bubbles have attracted attention in place of fire extinguishing activities using water for extinguishing fires. A fire extinguisher using this fire extinguisher is called a Compressed Air Foam System (CAFS). The compressed air foam fire extinguisher is mounted on a fire pump vehicle to extinguish the fire by ejecting the fire extinguishing foam from a nozzle to a fire site (for example, see Patent Document 2).

JP, 2007-105202, A JP, 2010-220686, A

  The compressed air foam fire extinguisher uses a fire engine pump driven by a traveling engine mounted on a fire pump vehicle to pressurize fire extinguishing water and discharge high-pressure water. By mixing the high-pressure water with a fire-extinguishing agent, a pressurized fire-extinguishing mixed liquid is generated. Then, the fire-extinguishing foam is generated by mixing the compressed air compressed by the compressor driven by the traveling engine with the fire-extinguishing mixed liquid. Fire extinguishing activities are carried out by ejecting fire extinguishing bubbles to the fire scene. As described above, the fire extinguishing mixed liquid and the compressed air are pressurized to a high pressure by using the fire pump and the compressor driven by the traveling engine, respectively. Compressed air foam extinguishers require large, heavy sources of high pressure, such as fire pumps and compressors. Therefore, it is a heavy burden for the firefighter to carry out the afterglow treatment in a forest fire where the workability is poor by carrying a compressed air foam extinguisher equipped with a high-pressure generation source on the back of the firefighter.

  Therefore, the technical problem to be solved by the present invention is to provide an unmanned air vehicle capable of treating afterglow in a forest fire or the like having poor workability without using a large and heavy fire extinguisher. is there.

  In order to solve the above technical problems, according to the present invention, the following unmanned flying vehicle is provided.

That is, the unmanned air vehicle according to the present invention,
A plurality of rotors that are driven to rotate by a motor,
A foam extinguishing device having a container in which a solution containing a foam extinguisher is stored, and a foam generating unit for generating extinguishing foam from the solution stored in the container,
The foam extinguisher is arranged below the rotary blades,
It is characterized in that the fire-extinguishing foam generated from the foam-generating unit is supplied by dropping to a site where an afterglow treatment is to be performed.

  According to this invention, the unmanned air vehicle supplies the fire extinguishing foam by dropping to the site where the afterglow treatment should be performed, through the foam generating unit of the foam extinguishing device arranged below the rotor blade, so that the firefighter It is possible to deal with afterglow in a forest fire that has poor workability without carrying a fire extinguisher on the back.

1 is a front view of an unmanned air vehicle according to an embodiment of the present invention. It is a top view of the unmanned air vehicle shown in FIG. It is a figure explaining 1st Embodiment of the foam fire extinguisher in an unmanned flying body. It is a cross-sectional top view which shows the internal structure of the foam extinguisher shown in FIG. It is a figure explaining 2nd Embodiment of the foam fire extinguisher in an unmanned flying body. It is a figure explaining 3rd Embodiment of the foam fire extinguisher in an unmanned flying body. It is a figure explaining 4th Embodiment of the foam fire extinguisher in an unmanned flying body. It is a figure explaining 5th Embodiment of the foam fire extinguisher in an unmanned flying body. It is a figure explaining 6th Embodiment of the foam fire extinguisher in an unmanned flying body.

  An unmanned air vehicle 1 including a foam fire extinguisher 10 according to an embodiment will be described with reference to FIGS. 1 to 4.

  FIG. 1 is a front view of an unmanned air vehicle 1 according to an embodiment of the present invention. FIG. 2 is a plan view of the unmanned air vehicle 1 shown in FIG. FIG. 3 is a diagram illustrating a first embodiment of the foam extinguishing apparatus 10 in the unmanned air vehicle 1. FIG. 4 is a cross-sectional plan view showing the internal structure of the foam fire extinguisher 10 shown in FIG.

  The unmanned flying vehicle 1 is a small flying vehicle that flies by remote control or automatic control. As shown in FIGS. 1 and 2, the unmanned aerial vehicle 1 has a main body 5, four wing support arms 4, four electric motors 7, four rotary wings 3, and leg frames 6.

  The main body 5 is formed in a central region of the unmanned air vehicle 1, and the main body 5 stores various sensors such as a gyro sensor, an acceleration sensor, an atmospheric pressure sensor or a GPS sensor, a communication means, and a flight route. And a flight controller including a control means for controlling flight. The flight controller has a function of controlling the flight posture and flight route of the unmanned air vehicle 1 by remote control or automatic control. Further, the main body portion 5 is equipped with a battery as a drive power source for the unmanned air vehicle 1.

  The four wing support arms 4 are arranged so as to extend from the main body 5 in a substantially cross shape in plan view. The four electric motors 7 are arranged at the tip of each wing support arm 4. The four rotor blades 3 are arranged above each electric motor 7. The rotary blade 3 is axially supported by the drive shaft of the electric motor 7. The flight controller controls the number of rotations of each rotary wing 3 so that the unmanned aerial vehicle 1 can perform ascending and descending operations, and can fly in the front-rear direction and the left-right direction.

  The leg frame 6 is arranged below the main body 5 so that the foam fire extinguisher 10 can be mounted on the leg frame 6. In addition, the leg frame 6 also serves as a supporting leg when the unmanned air vehicle 1 is attached and detached.

[First Embodiment]
As shown in FIG. 3 and FIG. 4, the foam fire extinguisher 10 according to the first embodiment has a rectangular or circular housing 20 in plan view and a rectangular or circular housing 20 disposed in the housing 20 in plan view. And a container 30. The container 30 is supported by a plurality of container support arms (not shown) extending so as to connect the housing casing 21 of the housing 20 and the container casing 31 of the container 30.

  The container 30 has a container lid 32 on the upper surface side, and has a liquid outlet 34 in the central portion on the bottom surface side. The container lid 32 prevents the downwash flow D from entering the container 30. A solution L containing a foam extinguishing agent is contained in the container casing 31. The container 30 has a liquid storage capacity of, for example, about 10 liters. The container 30 has a container inclined surface 33, and the container inclined surface 33 extends obliquely downward so as to connect the inner side surface of the container casing 31 and the liquid outlet 34. The liquid outlet 34 is sized and configured to allow the solution L to drip.

  The foam extinguishing agent contained in the solution L is a surfactant made from vegetable oils and fats, and is easily decomposed by microorganisms, and thus has an advantage of being environmentally friendly. The foam extinguishing agent is contained in the solution L at a concentration of, for example, about 1%. As the foam extinguishing agent, for example, one sold under the name Miracle Foam (registered trademark) by Morita Co., Ltd. can be used.

  The housing 20 has an upper surface opening on the upper surface side, and has a bubble drop opening 24 in the central portion on the bottom surface side. The foam drop port 24 is dimensioned so that the fire-extinguishing foam F falls by its own weight. An upstream air guide portion 46 is formed by the inner surface of the casing casing 21 and the outer surface of the container casing 31. The housing 20 has a housing inclined surface 23, and the housing inclined surface 23 extends obliquely downward so as to connect the inner side surface of the housing casing 21 and the foam drop opening 24. The bottom surface portion of the container 30 and the housing inclined surface 23 form a downstream air guide portion 46. The upstream and downstream air guides 46 are formed outside the container 30 so as to surround the container 30.

  Above the foam extinguisher 10, four rotors 3 are located. When the rotor blades 3 rotate for flight, a downward downwash flow D shown by a broken line is generated. A part of the downwash flow D is configured to flow through the upstream air guide portion 46. The downwash flow D that has flowed through the upstream air guide portion 46 flows through the downstream air guide portion 46 and then reaches the gap area between the liquid outlet 34 and the bubble drop port 24. In the gap area, the solution L supplied dropwise from the container 30 is mixed with the downwash flow D guided by the air guide portion 46. Therefore, the gap area formed at the bottom of the container 30 serves as a mixing nozzle 26 for mixing the solution L and the downwash flow D.

  The fire extinguishing foam F is generated by mixing the solution L and the downwash flow D by the mixing nozzle 26. The generated fire-extinguishing foam F falls by its own weight through the foam drop port 24 as shown by an arrow A in FIG. Since the foam drop port 24 is located in the center of the foam extinguisher 10 and the downwash flow D is located on the outer periphery of the foam extinguisher 10, the falling of the fire extinguishing foam F is less likely to be affected by the downwash flow D. The fire extinguishing foam F can be accurately supplied to the site where the afterglow treatment should be performed. Further, since the foam extinguishing apparatus 10 uses the downwash flow D to generate the fire extinguishing foam F from the solution L stored in the container 30, there is no need for a power source or a driving mechanism for foam generation. Can be made compact and lightweight.

  As described above, the foam extinguisher 10 according to the first embodiment has the air guide portion 46 that guides the flow D of the downwash generated by the rotation of the rotary blades 3, and the mixing nozzle 26 provided at the bottom of the container 30. A gas-liquid mixing device 12 is provided. The gas-liquid mixing device 12 functions as a foam generation unit that generates a fire-extinguishing foam F from the solution L contained in the container 30.

  According to the above configuration, the unmanned aerial vehicle 1 extinguishes the fire extinguishing bubbles with respect to the site where the afterfire treatment is to be performed, through the gas-liquid mixing device (foam generating unit) 12 of the foam extinguishing device 10 arranged below the rotary blade 3. Since F is supplied by dropping, it is possible for a firefighter to carry out afterglow treatment in a forest fire, etc. where workability is poor without carrying a fire extinguisher on his back.

[Second Embodiment]
As shown in FIG. 5, the foam fire extinguisher 10 according to the second embodiment includes a casing 20 that is rectangular or circular in a plan view, and a container 30 that is disposed in the casing 20 and is rectangular or circular in a plan view. Have.

  The housing 20 has an upper surface opening on the upper surface side, and the housing lid 22 that covers the upper surface opening prevents the downwash flow D from entering the housing 20. The casing 20 has a foam drop port 24 in the center portion on the bottom surface side, and the foam drop port 24 is dimensioned so that the fire extinguishing bubble F overflowing from the container 30 falls by its own weight.

  The container 30 has an upper opening on the upper surface side. Since the housing lid 22 covers the upper opening of the housing 20 that houses the container 30, the downwash flow D is prevented from entering the container 30.

  The container 30 has a central opening flow path 38 on the lower center side of the container casing 31, and has a ring shape having an open upper surface side. A solution L containing a foam extinguishing agent is stored in a ring-shaped space inside the container casing 31. The container 30 is configured such that the height of the inner portion 35 of the container 30 forming the central opening channel 38 is lower than the height of the outer portion 37 of the container 30. The opening size of the central opening channel 38 is sized and configured so that the fire extinguishing foam F falls by its own weight. The central opening channel 38 is arranged so as to overlap the bubble drop port 24 in a plan view.

  A plurality of stirring devices 14 are arranged in the housing 20 and the container 30. The drive shaft 42 of the stirring motor 43 is attached to the container casing 31 in a watertight manner so as to penetrate the casing casing 21 and the outer portion 37 of the container casing 31. The stirrer 41 is attached to the tip of the drive shaft 42. The stirring motor 43 is driven by a battery for driving the unmanned flying vehicle 1 or a battery for stirring, and the rotation of the stirring body 41 is controlled by the flight controller. The solution L containing the foam extinguisher when the water is full is exposed in a part of the stirring body 41, that is, the end (outer end) of the stirring body 41 is filled with the solution L containing the foam extinguisher. The stirring body 41 is arranged in the container 30 so as to be located above the water level at that time. As a result, the stirring body 41 stirs the solution L contained in the container 30 while mixing air therein, so that the fire extinguishing foam F is generated from the solution L.

  The generated fire-extinguishing foam F falls by its own weight through the central opening flow path 38 and the foam dropping port 24, and is supplied to the site where the afterglow treatment is to be performed. The foam drop opening 24 is located at the center of the foam fire extinguisher 10, while the downwash flow D is located at the outer periphery of the foam fire extinguisher 10, so that the foam drop opening 24 is separated from the downwash flow D. Therefore, the falling of the fire-extinguishing foam F is not easily affected by the downwash flow D, and the fire-extinguishing foam F can be accurately supplied to the site where the afterfire treatment is to be performed. Further, by controlling the stirring operation of the stirring body 41, the fire extinguishing foam F can be generated at an appropriate timing, and the loss of the solution L containing the foam extinguishing agent can be reduced.

  As described above, the foam fire extinguisher 10 according to the second embodiment includes the stirring device 14 having the stirring body 41 that stirs the solution L contained in the container 30 while mixing air. The stirring device 14 functions as a foam generation unit that generates a fire-extinguishing foam F from the solution L contained in the container 30.

  According to the above configuration, the unmanned aerial vehicle 1 applies the fire extinguishing foam F to the site where the afterglow treatment is to be performed, through the stirring device (foam generating unit) 14 of the foam extinguishing device 10 arranged below the rotary blade 3. Since it is supplied by dropping, fire fighters do not have to carry a fire extinguisher on their backs, and it is possible to deal with afterglows in forest fires that have poor workability.

[Third Embodiment]
As shown in FIG. 6, the foam fire extinguisher 10 according to the third embodiment has a rectangular or circular housing 20 in a plan view, and a bottomed bottom which is disposed in the housing 20 and has a rectangular or circular shape in the plan view. And container 30 of.

  The housing 20 has an upper surface opening on the upper surface side, and the housing lid 22 that covers the upper surface opening prevents the downwash flow D from entering the housing 20. The housing 20 has a foam drop opening 24 on the bottom surface inside the side of the housing casing 21, and the foam drop opening 24 is dimensioned so that the fire extinguishing foam F overflowing from the container 30 falls by its own weight. It is configured.

  The container 30 is placed inside the housing 20. The container 30 has an upper opening on the upper surface side. Since the housing lid 22 covers the upper opening of the housing 20 that houses the container 30, the downwash flow D is prevented from entering the container 30. A plurality of stirring devices 14 are arranged in the container casing 31 of the container 30.

  A solution L containing a foam extinguishing agent is contained in the container casing 31. The drive shaft 42 of the stirring motor 43 is watertightly attached to the container casing 31 so as to penetrate the container casing 31. The stirrer 41 is attached to the tip of the drive shaft 42. The stirring motor 43 is driven by a battery for driving the unmanned flying vehicle 1 or a battery for stirring, and the rotation of the stirring body 41 is controlled by the flight controller. The solution L containing the foam extinguisher when the water is full is exposed in a part of the stirring body 41, that is, the end (outer end) of the stirring body 41 is filled with the solution L containing the foam extinguisher. The stirring body 41 is arranged in the container 30 so as to be located above the water level at that time. As a result, the stirring body 41 stirs the solution L contained in the container 30 while mixing air therein, so that the fire extinguishing foam F is generated from the solution L.

  The generated fire-extinguishing foam F overflows the upper edge portion 39 of the container casing 31, overflows, falls through the foam drop port 24 by its own weight, and is supplied to the site where the afterfire treatment is to be performed. Since the foam drop port 24 is inside the side portion of the casing casing 21 of the foam fire extinguisher 10, while the downwash flow D is on the outer peripheral part of the foam fire extinguisher 10, the foam drop port 24 is the downwash flow. Away from D. Therefore, the falling of the fire-extinguishing foam F is not easily affected by the downwash flow D, and the fire-extinguishing foam F can be accurately supplied to the site where the afterfire treatment is to be performed. Further, by controlling the stirring operation of the stirring body 41, the fire extinguishing foam F can be generated at an appropriate timing, and the loss of the solution L containing the foam extinguishing agent can be reduced.

  As described above, the foam fire extinguisher 10 according to the third embodiment includes the stirring device 14 having the stirring body 41 that stirs the solution L stored in the container 30 while mixing air. The stirring device 14 functions as a foam generation unit that generates a fire-extinguishing foam F from the solution L contained in the container 30.

  According to the above configuration, the unmanned aerial vehicle 1 applies the fire extinguishing foam F to the site where the afterglow treatment is to be performed, through the stirring device (foam generating unit) 14 of the foam extinguishing device 10 arranged below the rotary blade 3. Since it is supplied by dropping, fire fighters do not have to carry a fire extinguisher on their backs, and it is possible to deal with afterglows in forest fires that have poor workability.

[Fourth Embodiment]
As shown in FIG. 7, the foam fire extinguishing apparatus 10 according to the fourth embodiment includes a rectangular or circular casing 20 in a plan view, and a rectangular or circular container 30 arranged in the casing 20 in a plan view. Have.

  The casing 20 has an upper surface opening on the upper surface side, and has a foam drop opening 24 in the central portion on the bottom surface side. The foam drop opening 24 allows the fire extinguishing foam F overflowing from the container 30 to drop by its own weight. Dimensions are configured.

  The container 30 has an upper opening on the upper surface side. The container lid 32 that covers the upper opening prevents the downwash flow D from entering the container 30.

  The container 30 has a central opening flow path 38 on the lower center side of the container casing 31, and has a ring shape having an open upper surface side. A solution L containing a foam extinguishing agent is stored in a ring-shaped space inside the container casing 31. The container 30 is configured such that the height of the inner portion 35 of the container 30 is lower than the height of the outer portion 37 of the container 30 in order to form the central opening channel 38. The opening size of the central opening channel 38 is sized and configured so that the fire extinguishing foam F falls by its own weight. The central opening channel 38 is arranged so as to overlap the bubble drop port 24 in a plan view.

  An air guide space is formed between the casing casing 21 and the outer portion 37 of the container casing 31. Since the upper surface side of the housing 20 is opened by the upper surface opening, a part of the downwash flow D flows into the air guide space. Therefore, the air guide space functions as the air guide portion 46.

  The container 30 is provided with a plurality of air blowing devices 13. A tubular air blowing part 47 penetrating the container casing 31 is connected to the air guide space in the vicinity of the bottom surface of the housing 20 and below the air guide space. The tip of the air blowing portion 47 is located inside the outer portion 37 of the container casing 31 and forms an air blowing port 48. Therefore, the air of the downwash flow D flowing through the air guide space serving as the air guide portion 46 is discharged from the air blowing port 48 after flowing through the air blowing portion 47. The air discharged from the air blowing port 48 as bubbles B rises in the solution L containing the foam extinguishing agent while stirring the solution L containing the foam extinguishing agent. As a result, the downwash flow D flowing in the air guide space serving as the air guide unit 46 agitates the solution L contained in the container 30 while mixing air therein, so that the fire extinguishing foam F is generated from the solution L.

  The generated fire-extinguishing foam F falls by its own weight through the central opening flow path 38 and the foam dropping port 24, and is supplied to the site where the afterglow treatment is to be performed. The foam drop opening 24 is located at the center of the foam fire extinguisher 10, while the downwash flow D is located at the outer periphery of the foam fire extinguisher 10, so that the foam drop opening 24 is separated from the downwash flow D. Therefore, the falling of the fire-extinguishing foam F is hardly affected by the downwash flow D, and the fire-extinguishing foam F can be accurately supplied to the site where the afterfire treatment is to be performed. Further, since the foam extinguishing apparatus 10 uses the downwash flow D to generate the fire extinguishing foam F from the solution L stored in the container 30, there is no need for a power source or a driving mechanism for foam generation. Can be made compact and lightweight.

  As described above, in the foam extinguishing apparatus 10 according to the fourth embodiment, the wind guide portion 46 that guides the downwash flow D generated by the rotation of the rotary blades 3, and the downwash flow D that is guided by the wind guide portion 46. An air blowing unit 13 having an air blowing unit 47 that blows into the solution L stored in the container 30 and supplies the solution L. The air blowing device 13 functions as a foam generation unit that generates a fire-extinguishing foam F from the solution L contained in the container 30.

  According to the above configuration, the unmanned aerial vehicle 1 is extinguished with the fire extinguishing foam F with respect to the site where the afterglow treatment is to be performed, through the air blowing device (foam generating unit) 13 of the foam extinguishing device 10 arranged below the rotary blade 3. Since it is supplied by dropping, it is possible for firefighters to carry out afterglow treatment in forest fires that have poor workability without carrying a fire extinguisher on their backs.

[Fifth Embodiment]
As shown in FIG. 8, the foam fire extinguisher 10 according to the fifth embodiment has a rectangular or circular housing 20 in a plan view, and a bottomed bottom which is disposed in the housing 20 and has a rectangular or circular shape in the plan view. And container 30 of.

  The housing 20 has an upper surface opening on the upper surface side. The housing 20 has a foam drop opening 24 on the bottom surface inside the side of the housing casing 21, and the foam drop opening 24 is dimensioned so that the fire extinguishing foam F overflowing from the container 30 falls by its own weight. It is configured.

  The container 30 has an upper opening on the upper surface side and has an upper edge portion 39. The container 30 is placed inside the housing 20. A plurality of air blowing portions 47 are arranged near the bottom of the container 30.

  An air guide member 45 is provided between the housing casing 21 and the container casing 31. Since the upper part of the air guide body 45 is wide like a funnel, the downwash flow D can be easily collected. At the same time, since the upper part of the air guide member 45 is configured to cover the container 30, it is difficult for the downwash flow D to flow into the container 30. Further, the container 30 may be configured to be completely covered by the upper portion of the air guide member 45.

  An air guide space is formed between the housing casing 21 and the air guide body 45. Since the upper surface side of the housing 20 is opened by the upper surface opening, a part of the downwash flow D flows into the air guide space. Therefore, the air guide space functions as the air guide portion 46.

  The container 30 is provided with a plurality of air blowing devices 13. A tubular air blowing part 47 penetrating the container casing 31 is connected to the air guide space in the vicinity of the bottom surface of the housing 20 and below the air guide space. The tip of the air blowing portion 47 is located inside the outer portion 37 of the container casing 31 and forms an air blowing port 48. Therefore, the air of the downwash flow D flowing through the air guide space serving as the air guide portion 46 is discharged from the air blowing port 48 after flowing through the air blowing portion 47. The air discharged from the air blowing port 48 as bubbles B rises in the solution L containing the foam extinguishing agent while stirring the solution L containing the foam extinguishing agent. As a result, the downwash flow D flowing in the air guide space serving as the air guide unit 46 agitates the solution L contained in the container 30 while mixing air therein, so that the fire extinguishing foam F is generated from the solution L.

  The generated fire-extinguishing foam F overflows the upper edge portion 39 of the container casing 31, overflows, falls through the foam drop port 24 by its own weight, and is supplied to the site where the afterfire treatment is to be performed. Since the foam drop port 24 is inside the side portion of the casing casing 21 of the foam fire extinguisher 10, while the downwash flow D is on the outer peripheral part of the foam fire extinguisher 10, the foam drop port 24 is the downwash flow. Away from D. Therefore, the falling of the fire-extinguishing foam F is not easily affected by the downwash flow D, and the fire-extinguishing foam F can be accurately supplied to the site where the afterfire treatment is to be performed. Further, since the foam extinguishing apparatus 10 uses the downwash flow D to generate the fire extinguishing foam F from the solution L stored in the container 30, there is no need for a power source or a driving mechanism for foam generation. Can be made compact and lightweight.

  As described above, the foam fire extinguishing apparatus 10 according to the fifth embodiment stores the airflow guide portion 46 that guides the downwash D generated by the rotation of the rotor 3 and the downwash flow D guided by the air guide portion 46 in the container. An air blowing unit 13 having an air blowing unit 47 that blows and supplies the solution L stored in 30. The air blowing device 13 functions as a foam generation unit that generates a fire-extinguishing foam F from the solution L contained in the container 30.

  According to the above configuration, the unmanned aerial vehicle 1 is extinguished with the fire extinguishing foam F with respect to the site where the afterglow treatment is to be performed, through the air blowing device (foam generating unit) 13 of the foam extinguishing device 10 arranged below the rotary blade 3. Since it is supplied by dropping, it is possible for firefighters to carry out afterglow treatment in forest fires that have poor workability without carrying a fire extinguisher on their backs.

[Sixth Embodiment]
As shown in FIG. 9, the foam fire extinguisher 10 according to the sixth embodiment has a bottomed casing 20 having a rectangular or circular shape in a plan view, and a rectangular or circular shape disposed in the casing 20 in a plan view. It has a bottomed container 30 and a funnel-shaped foaming container 51 below.

  The housing 20 has an upper surface opening on the upper surface side, and has a foam drop opening 24 in the central portion on the bottom surface side. In the foam drop opening 24, the fire extinguishing foam F discharged from the foaming container 51 falls by its own weight. Is dimensioned as follows.

  The container 30 has an upper opening on the upper surface side. The housing cover 22 that covers the upper opening of the housing 20 prevents the downwash flow D from entering the container 30.

  The container 30 has a flow-down opening on the lower center side of the container casing 31. A solution L containing a foam extinguishing agent is contained in the container casing 31. The flow-down opening of the container 30 communicates with the liquid supply port 57 of the foaming container 51 by the communication part 52. The opening / closing valve 53 provided in the communication section 52 controls the timing of the flow of the solution L. In the solution L containing the foam extinguishing agent, a foaming gas such as carbon dioxide gas is dissolved.

  The foaming container 51 is disposed immediately below the container 30 and is in communication with the container 30 via the communication portion 52. An inclined guiding surface 54 and a foam outlet 58 communicating with the outside are formed in the lower portion of the foaming container 51. A support portion 55 that supports the foaming body 60 is provided on the foam outlet 58. The support portion 55 has a mesh-shaped through hole 56 dimensioned so that the fire-extinguishing foam F falls by its own weight. The foaming body 60 is, for example, a lump having a large number of minute holes on the surface thereof, such as ramune, menthol, and chips of unglazed body. Even if the foaming body 60 swings during the flight of the unmanned flying body 1, the foaming body 60 is positioned on the support portion 55 due to the guide surface 54 inclined toward the bubble outlet 58. With this configuration, the solution L flowing down from the liquid supply port 57 can be reliably supplied to and contact with the foaming body 60. When the solution L contacts the foaming body 60, the fire-extinguishing foam F is generated from the solution L.

  The generated fire-extinguishing foam F falls by its own weight through the through hole 56, the foam outlet 58, and the foam dropping port 24, and is supplied to the site where the afterfire treatment is to be performed. The foam drop opening 24 is located at the center of the foam fire extinguisher 10, while the downwash flow D is located at the outer periphery of the foam fire extinguisher 10, so that the foam drop opening 24 is separated from the downwash flow D. Therefore, the falling of the fire-extinguishing foam F is not easily affected by the downwash flow D, and the fire-extinguishing foam F can be accurately supplied to the site where the afterfire treatment is to be performed. Further, since the timing at which the solution L in which the foaming gas is dissolved is supplied to and brought into contact with the foaming body 60 can be controlled by the opening / closing valve 53, the fire-extinguishing foam F can be generated at an appropriate timing, and the foam extinguishing agent is included. The loss of the solution L can be reduced. Further, the foam extinguisher 10 uses the solution L in which the foaming gas is dissolved and the foaming body 60 to generate the fire extinguishing foam F from the solution L contained in the container 30. It does not require a power supply or drive mechanism and can be made compact and lightweight.

  As described above, the foam fire extinguisher 10 according to the sixth embodiment is housed in the foam container 51 and the foam container 51 having the liquid supply port 57 that communicates with the container 30 and the foam outlet 58 that communicates with the outside. In addition, a foaming device 15 having a foaming body 60 having a large number of minute holes on its surface is provided. The foaming device 15 functions as a foam generating unit that generates the fire-extinguishing foam F from the solution L stored in the container 30.

  According to the above configuration, the unmanned aerial vehicle 1 is extinguished with the fire extinguishing foam F with respect to the site where the afterglow treatment is to be performed, through the foaming device (foam generating unit) 15 of the foam extinguishing device 10 arranged below the rotary blade 3. Since it is supplied by dropping, it is possible for firefighters to carry out afterglow treatment in forest fires that have poor workability without carrying a fire extinguisher on their backs.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be carried out within the scope of the present invention.

  Embers treatment is a recurrence prevention activity that extinguishes the embers of a suppressed fire. The unmanned aerial vehicle 1 according to the present invention is preferably applied to the afterglow treatment of forest fires having poor workability, but can also be applied to the afterglow treatment of house fires and factory fires.

  Although the unmanned aerial vehicle 1 shown in FIG. 2 has four rotor blades 3, it may be configured to have an even number such as six or eight rotor blades 3.

  In the second and third embodiments, the stirrer 14 is arranged at the bottom of the container casing 31, and the stirrer 41 is U-shaped or I-shaped so that the end of the stirrer 41 is a solution when the water is full. It can also be configured to be exposed from L.

  A mesh-like net (foam size regulating member) can be arranged immediately after the place where the fire-extinguishing foam F is generated so that the size of the fire-extinguishing foam F can be made equal to a predetermined size. The foam size regulating member is arranged at the foam drop opening 24 in the first and sixth embodiments, arranged at the inner upper end portion 36 in the second and fourth embodiments, and the third and third embodiments, for example. In the fifth embodiment, it is arranged at the upper edge 39.

  In the sixth embodiment, the solution L may further include a surfactant such as aspartame or potassium benzoate to help foaming.

  The present invention and embodiments are summarized as follows.

The unmanned aerial vehicle 1 according to one embodiment of the present invention is
A plurality of rotor blades 3 which are rotationally driven by a motor 7,
A foam extinguisher 10 having a container 30 in which a solution L containing a foam extinguishing agent is housed, and a foam generation unit 12, 13, 14, 15 for generating a fire extinguishing foam F from the solution L housed in the container 30. Equipped with
The foam extinguisher 10 is arranged below the rotary blades 3,
It is characterized in that the fire-extinguishing foam F generated from the foam-generating unit 12, 13, 14, 15 is supplied to the site where the afterfire treatment is to be performed by dropping.

  According to the above configuration, the unmanned aerial vehicle 1 extinguishes the fire extinguishing bubbles with respect to the site where the afterglow treatment is to be performed through the bubble generating units 12, 13, 14, 15 of the bubble extinguishing device 10 arranged below the rotary blade 3. Since it is supplied by dropping, it is possible for firefighters to carry out afterglow treatment in forest fires that have poor workability without carrying a fire extinguisher on their backs.

In addition, in the unmanned air vehicle 1 of one embodiment,
The foam generating unit is the stirring device 14 having the stirring body 41 that stirs the solution L contained in the container 30 while mixing air therein.

  According to the above embodiment, by controlling the stirring operation of the stirring body 41, the fire-extinguishing foam F can be generated at an appropriate timing, and the loss of the solution L containing the foam extinguishing agent can be reduced.

In addition, in the unmanned air vehicle 1 of one embodiment,
The bubble generating unit stores the downwash flow D generated by the rotation of the rotary blades 3 in the vessel 30 and the downwash flow D introduced by the wind guiding unit 46 in the container 30. And an air blowing part 47 for supplying the solution L.

  According to the above-described embodiment, the foam fire extinguishing apparatus 10 uses the flow D of downwash to generate the fire extinguishing foam F from the solution L stored in the container 30, and therefore, the power supply and the drive mechanism for foam generation. It is possible to realize downsizing and weight saving without requiring.

In addition, in the unmanned air vehicle 1 of one embodiment,
The container 30 has a ring shape whose upper surface side is open, and has a central opening flow path 38 on the center side of the container 30,
The central opening channel 38 is formed by making the height of the inner portion 35 of the container 30 lower than the height of the outer portion 37 of the container 30, and the fire-extinguishing foam F falls through the central opening channel 38. Is configured to.

  According to the above-described embodiment, since the central opening flow path 38 is in the central portion of the foam fire extinguisher 10, while the downwash flow D is in the outer peripheral portion of the foam fire extinguisher 10, the central opening flow passage 38 is in the downwash state. Away from stream D. Therefore, the falling of the fire-extinguishing foam F is not easily affected by the downwash flow D, and the fire-extinguishing foam F can be accurately supplied to the site where the afterfire treatment is to be performed.

In addition, in the unmanned air vehicle 1 of one embodiment,
The bubble generation unit is a gas-liquid mixing device 12 having an air guide unit 46 for guiding the downwash flow D generated by the rotation of the rotary blades 3, and a mixing nozzle 26 provided at the bottom of the container 30,
In the mixing nozzle 26, the solution L supplied from the container 30 is mixed with the downwash flow D guided by the air guide portion 46.

  According to the above-described embodiment, the foam fire extinguishing apparatus 10 uses the flow D of downwash to generate the fire extinguishing foam F from the solution L stored in the container 30, and therefore, the power supply and the drive mechanism for foam generation. It is possible to realize downsizing and weight saving without requiring.

In addition, in the unmanned air vehicle 1 of one embodiment,
The foam generating section has a foam supply container 51 having a liquid supply port 57 communicating with the container 30 and a foam outlet 58 communicating with the outside; A foaming device 15 having a foaming body 60 held in
Gas for foaming is dissolved in the solution L,
The solution L in which the foaming gas is dissolved is supplied to the foaming body 60 through the liquid supply port 57 and comes into contact with the foaming body 60, whereby the fire-extinguishing foam F is generated, and the generated fire-extinguishing foam F is It flows out from the bubble outlet 58.

  According to the above-described embodiment, the foam extinguishing apparatus 10 uses the solution L in which the foaming gas is dissolved and the foaming body 60 to generate the fire extinguishing foam F from the solution L housed in the container 30. Therefore, a power source and a drive mechanism for generating bubbles are not required, and the size and weight can be reduced.

In addition, in the unmanned air vehicle 1 of one embodiment,
The foam extinguishing agent is a surfactant made of vegetable oil.

  According to the above-described embodiment, the foam extinguisher is easily decomposed by microorganisms, and thus is environmentally friendly.

1: Unmanned aerial vehicle 3: Rotor wing 4: Wing support arm 5: Main body part 6: Leg frame 7: Electric motor
10: Bubble extinguisher 12: Gas-liquid mixing device (foam generator)
13: Air blowing device (foam generator)
14: Stirrer (foam generator)
15: Foaming device (foam generator)
20: case 21: case casing 22: case lid 23: case inclined surface 24: foam dropping port 26: mixing nozzle 30: container 31: container casing 32: container lid 33: container inclined surface 34: liquid outlet 35: inner part 36: inner upper end part 37: outer part 38: central opening channel 39: upper edge part 41: agitator 42: drive shaft 43: agitating motor 45: air guide 46: air guide 47: air blower 48: Air blowing port 51: Foaming container 52: Communication part 53: Open / close valve 54: Guide surface 55: Support part 56: Through hole 57: Liquid supply port 58: Foam outlet 60: Foaming body A: Fire extinguishing foam Flow B: Air bubbles D: Flow of downwash F: Fire extinguishing foam L: Solution containing foam extinguishing agent

Claims (7)

A plurality of rotors that are driven to rotate by a motor,
A foam extinguishing device having a container in which a solution containing a foam extinguisher is stored, and a foam generating unit for generating extinguishing foam from the solution stored in the container,
The foam extinguisher is arranged below the rotary blades,
An unmanned air vehicle, wherein the fire-extinguishing foam generated from the foam-generating unit is supplied by dropping to a site where an afterglow treatment is to be performed.   The unmanned air vehicle according to claim 1, wherein the foam generating unit is a stirring device having a stirring member that stirs the solution contained in the container while mixing air therein.   The bubble generation unit supplies a wind guiding unit that guides the flow of downwash generated by the rotation of the rotary blade and the flow of the downwash that is guided by the wind guiding unit to the solution stored in the container. The unmanned air vehicle according to claim 1, which is an air blowing device having an air blowing portion. The container has a ring-shaped opening on the upper surface side and has a central opening channel on the center side of the container,
The central opening channel is formed by making the height of the inner portion of the container lower than the height of the outer portion of the container, and the fire extinguishing foam is configured to fall through the central opening channel. The unmanned air vehicle according to any one of claims 1 to 3, characterized in that The bubble generation unit is a gas-liquid mixing device having an air guide unit for guiding the flow of downwash generated by the rotation of the rotary blade, and a mixing nozzle provided at the bottom of the container,
The unmanned air vehicle according to claim 1, wherein the mixing nozzle mixes the solution supplied from the container with the downwash flow guided by the air guide unit. The foam generating unit has a liquid supply port communicating with the container, a foam container having a foam outlet communicating with the outside, and a foaming container housed in the foam container and having a large number of minute holes on the surface. A foaming device having a body,
In the solution, a gas for foaming is dissolved,
The solution in which the foaming gas is dissolved is supplied to the foaming body through the liquid supply port and comes into contact with the foaming body, whereby the fire-extinguishing foam is generated, and the generated fire-extinguishing foam flows out from the foam outlet. The unmanned aerial vehicle according to claim 1, wherein   The unmanned air vehicle according to any one of claims 1 to 6, wherein the foam extinguishing agent is a surfactant made of vegetable oil and fat as a raw material.

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