Water cannon remote control device

Abstract

To provide a water gun remote control device excellent in user-friendliness, which can endure a high temperature and water immersion in a fire environment, and can be operated by a firefighter remotely from a safe place.SOLUTION: A water gun remote control device includes; a water gun 10 for spreading out a fire extinguishing agent; a cylinder 20 attached to the water gun 10, which has volume chambers zoned with a piston 21 as a boundary, is operated by actuation fluid, and changes directions or a flow rate of the water gun 10; a selector valve 30 installed separately from the water gun 10 for controlling operation of the cylinder 20 by selection of supply or non-supply of the actuation fluid; a flexible conveyance pipe 40 through which the actuation fluid flows, one end of which is connected to a first connector 60 provided on a selector valve 30 side, and the other end of which is connected to a second connector 70 provided on a cylinder 20 side; and a hose reel 50 around which the conveyance pipe 40 is wound. The first connector 60 is a rotary connector that can freely rotate, and is disposed coaxially with a rotary shaft of the hose reel 50.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water cannon remote control device that remotely controls a water cannon used for fire extinguishing. [Background technology]

[0002] When a fire grows larger, it becomes difficult for firefighters to approach the fire and spray water due to the strong radiant heat and hot air. To address this problem, methods have been proposed for remotely controlling water cannons. For example, Patent Document 1 discloses a remote control device for a water cannon in which a water cannon whose azimuth angle and / or elevation angle can be changed is connected to a pump truck via a hose with a built-in line, an intermediate control unit that controls the azimuth angle and / or elevation angle of the water cannon is provided midway through the hose with a built-in line, and the intermediate control unit and the water cannon are electrically connected via a line within the hose. Patent Document 2 discloses a remotely operated water cannon that includes a swing drive actuator that receives hydraulic or gas pressure to swing a nozzle, a depression / elevation drive actuator that receives hydraulic or gas pressure to tilt the nozzle up and down, a swing drive amount detector, a depression / elevation drive amount detector, a swing operation amount detector that detects the amount of swing operation of an operating means and outputs an electrical signal, a depression / elevation operation amount detector that detects the amount of swing operation of an operating means and outputs an electrical signal, swing drive control means that outputs a corrected swing drive signal to the swing drive actuator, and depression / elevation drive control means that outputs a corrected depression / elevation drive signal to the depression / elevation drive actuator. Furthermore, Patent Document 3 discloses a remote control device for a water cannon, which uses the pressure of fire-fighting water to remotely control the elevation and rotation of the water cannon. Furthermore, Patent Document 4 discloses a pneumatic remote control device for a water cannon that improves the responsiveness of the pneumatic circuit of the water cannon, which uses air pressure to operate an actuator in a drive unit located at a distance from the operating unit. Furthermore, Non-Patent Document 1 discloses a prototype remotely operated water cannon with water pressure control designed for use in extinguishing large-scale fires; the remotely operated water cannon comprises a main body including two hydraulic cylinders, an operation console including a control valve and a hose reel for remote operation, one hose through which pressurized water flows from the water cannon main body to the control valve, and two hoses that transmit the required pressure to two cylinders for rotation and elevation, and the hose reel is designed to reel in all three hoses separately. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 01-265978 [Patent Document 2] Special Publication No. 06-034838 [Patent Document 3] Japanese Patent Application Publication No. 52-061398 [Patent Document 4] Special Publication No. 56-008624 [Non-patent literature]

[0004] [Non-Patent Document 1] Masaru Wakachi and two others, "Research and Prototype of Remotely Controlled Water Cannon", Fire and Disaster Management Research Institute Bulletin, No. 2 (1965), Internet<URL:https: / / www.tfd.metro.tokyo.lg.jp / hp-gijyutuka / shyohou2 / 02 / 02-09.pdf> Summary of the Invention [Problem to be solved by the invention]

[0005] In waste disposal facilities and factories, electric remote-controlled water cannons are often used because the locations where fires are expected to occur are identified in advance and power sources are easily secured. However, if a large fire occurs in other locations, such as on a road, power sources may not be available and electric remote-controlled water cannons may not be usable. Also, in large buildings equipped with fire extinguishing equipment, and even in waste disposal facilities and factories, the scale of the fire may exceed the capacity of the existing fire extinguishing equipment, and in such cases, firefighters may be required to extinguish the fire, but if power sources cannot be secured, electric remote-controlled water cannons cannot be used. The remote control device for the water cannon described in Patent Document 1 uses electricity to control the azimuth and elevation angles of the water cannon, and cannot be used if a power source cannot be secured. Furthermore, the remote-controlled water cannon described in Patent Document 2 uses hydraulic pressure to rotate and elevate the nozzle, which requires a hydraulic motor, hydraulic control circuit, etc., making the configuration complex. Furthermore, the remote control device for the water cannon described in Patent Document 3 uses the pressure of the fire-extinguishing water to elevate and rotate the water cannon. However, since the solenoid valves for introducing some of the fire-extinguishing water into the elevation cylinder and rotation cylinder are built into a control box located near the water cannon, there is a concern that the solenoid valves may malfunction due to high temperatures or flooding in a fire environment. Furthermore, the pneumatic remote control device described in Patent Document 4 is limited to using air pressure to operate the water cannon, and cannot use liquids such as water. Furthermore, the remote-controlled water cannon described in Non-Patent Document 1 has pressurized water pipes connected to the axis of the hose reel to adjust the pressure for pivoting and raising / lowering operations from the left and right, and is connected to two hoses through the axis, so there are cases where the hoses cannot be wound up or unfolded smoothly. Therefore, an object of the present invention is to provide a water cannon remote control device that is easy to use, can withstand high temperatures and flooding in a fire environment, and can be remotely operated by firefighters from a safe location. [Means for solving the problem]

[0006] The water cannon remote control device of the present invention described in claim 1 comprises a water cannon 10 that sprays a fire extinguishing agent, a piston 21 that is attached to the water cannon 10, a chamber that is partitioned by a piston 21, and a hydraulic fluid that is operated to direct the water cannon 10. Kiwo Change cylinder 20 and , written by A switching valve 30 that controls the operation of the cylinder 20 by switching between supplying and not supplying the working fluid; Equipped with , The cylinder 20 includes a first cylinder 20A that moves the barrel of the water cannon 10 in a horizontal direction and a second cylinder 20B that moves the nozzle of the water cannon 10 in a vertical direction, the changeover valve 30 includes a first changeover valve 30A connected to the first cylinder 20A and a second changeover valve 30B connected to the second cylinder 20B, changeover valve connection pipes 41 of the first changeover valve 30A and the second changeover valve 30B are connected to a first joint 60, and cylinder connection pipes 42 of the first cylinder 20A and the second cylinder 20B are connected to a second joint 70, The first joint 60 is a freely rotatable rotary joint and is arranged coaxially with the rotation axis of the hose reel 50. A plurality of transport pipes 40 corresponding to the respective switching valve connecting pipes 41 are wound around the hose reel 50, the transport pipes 40 are flexible, the working fluid from the switching valve 30 is supplied to the cylinder 20 through the transport pipes 40, and the plurality of transport pipes 40 are connected to the second joint 70, so that the switching valve 30 is installed away from the water cannon 10 depending on the length of the transport pipes 40. It is characterized by: The present invention as set forth in claim 2 provides the remote control device for the water cannon as set forth in claim 1. , complex A feature of this system is that several transport pipes 40 are integrated into one collecting pipe 100. The present invention described in claim 3 is characterized in that, in the water cannon remote control device described in claim 1 or claim 2, the cylinder 20 has a communication passage 23 that connects each of the volume chambers to the outside, and a fixed throttle 24 is provided in the communication passage 23. The present invention as set forth in claim 4 is characterized in that in the water cannon remote control device as set forth in any one of claims 1 to 3, when the water cannon 10 is in operation, the working fluid is continuously supplied to the volume chambers of the cylinder 20, except for the volume chamber on the discharge side. The present invention as set forth in claim 5 is characterized in that in the water cannon remote control device as set forth in claim 4, the cylinder 20 has equal pressure-receiving areas on both sides of the piston 21. The present invention as set forth in claim 6 is characterized in that in the water cannon remote control device as set forth in any one of claims 1 to 5, the working fluid is water, air, or a mixture of water and air. The present invention as set forth in claim 7 is characterized in that in the water cannon remote control device as set forth in any one of claims 1 to 6, the first joint 60 has a plurality of flow paths connected to the transport pipe 40. The present invention described in claim 8 is characterized in that, in the water cannon remote control device described in any one of claims 1 to 7, the second joint 70 has a metal insert 76 and a metal receiving bracket 77, and is provided with an unexpected detachment prevention mechanism that prevents the connection between the metal insert 76 and the metal receiving bracket 77 from being suddenly released. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a water cannon remote control device that is easy to use, can withstand high temperatures and flooding in a fire environment, and can be remotely operated by firefighters from a safe location. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram of a remote control device for a water cannon according to an embodiment of the present invention; [Figure 2] Conceptual diagram of the water cannon [Figure 3] Conceptual diagram of the water cannon barrel [Figure 4] Conceptual diagram showing transport pipes consolidated into the same collecting pipe [Figure 5] Conceptual diagram of the hose reel [Figure 6] A diagram showing the internal structure of the first joint [Figure 7] A diagram showing the internal structure of the second joint DETAILED DESCRIPTION OF THE INVENTION

[0009] The water cannon remote control device according to the first embodiment of the present invention comprises a water cannon that sprays fire extinguishing agent, a piston attached to the water cannon, a volume chamber defined by a piston, and a hydraulic fluid that is actuated by the piston to direct the water cannon. Kiwo a cylinder to be changed, and a switching valve to control the operation of the cylinder by switching between supplying and not supplying the working fluid; Equipped with , The cylinders include a first cylinder that moves the barrel of the water cannon horizontally and a second cylinder that moves the nozzle of the water cannon vertically, and the changeover valves include a first changeover valve connected to the first cylinder and a second changeover valve connected to the second cylinder, and the changeover valve connection pipes of the first changeover valve and the second changeover valve are connected to a first joint, and the cylinder connection pipes of the first cylinder and the second cylinder are connected to a second joint, The first joint is a freely rotatable rotary joint and is arranged coaxially with the rotation axis of the hose reel. A plurality of transport pipes corresponding to the respective switching valve connecting pipes are wound around the hose reel, and the transport pipes are flexible. The operating fluid from the switching valve is supplied to the cylinder through the transport pipes, and the plurality of transport pipes are connected to the second joint, so that the switching valve is installed away from the water cannon depending on the length of the transport pipes. It is something. According to this embodiment, the first joint is a rotary joint and is arranged coaxially with the rotation axis of the hose reel, allowing for rapid winding and unwinding of the transport pipe. The first joint also allows the hydraulic fluid supplied from the switching valve to the cylinder to pass continuously while rotating in accordance with the rotation of the hose reel. Furthermore, because the water cannon is remotely controlled using the fluid pressure of the hydraulic fluid, it can be used in harsh fire environments where it is exposed to high temperatures and large amounts of water.

[0010] The second embodiment of the present invention is a water cannon remote control device according to the first embodiment, , complex Several transport pipes are combined into one collecting pipe. According to this embodiment, the transport pipe can be wound up and unwound by the hose reel more quickly.

[0011] A third embodiment of the present invention is a water cannon remote control device according to the first or second embodiment, wherein the cylinder has a communication passage in each of the volume chambers that communicates with the outside, and a fixed throttle is provided in the communication passage. According to this embodiment, when the pressure of the working fluid is applied, the air in the cylinder is automatically discharged from the connecting passage by the fluid pressure, which eliminates the need for firefighters to vent the gas before starting firefighting activities, allowing firefighting activities to begin more quickly.

[0012] A fourth embodiment of the present invention is a water cannon remote control device according to any one of the first to third embodiments, wherein when the water cannon is in operation, working fluid is continuously supplied to the chambers of the cylinder, except for the discharge-side chamber. According to this embodiment, water vapor generated by the heat of a fire inside the cylinder and air mixed therein can be discharged into the atmosphere, thereby enabling more stable control of the cylinder.

[0013] A fifth embodiment of the present invention is the water cannon remote control device according to the fourth embodiment, wherein the cylinder has equal pressure-receiving areas on both sides of the piston. According to this embodiment, even if pressure from the working fluid is continuously applied to the cylinder, the piston can be stopped at a desired position, so that the water cannon can be stably controlled by the cylinder.

[0014] A sixth embodiment of the present invention is a water cannon remote control device according to any one of the first to fifth embodiments, wherein the working fluid is water, air, or a mixture of water and air. According to this embodiment, a fluid that is relatively easy to obtain and handle can be used as the working fluid.

[0015] A seventh embodiment of the present invention is a water cannon remote control device according to any one of the first to sixth embodiments, wherein the first joint has a plurality of flow paths connected to the transport pipe. According to this embodiment, the working fluid can be quickly supplied from the switching valve to the cylinder.

[0016] In an eighth embodiment of the present invention, in the water cannon remote control device according to any one of the first to seventh embodiments, the second joint has a metal insert and a metal receiving bracket, and is provided with an unexpected detachment prevention mechanism that prevents the connection between the metal insert and the metal receiving bracket from being suddenly released. According to this embodiment, the second joint can be used to easily connect and disconnect a transport pipe or the like, and the insert can be prevented from unintentionally coming off the receiving fitting. [Example]

[0017] Hereinafter, a remote control device for a water cannon according to an embodiment of the present invention will be described. FIG. 1 is a block diagram of a water cannon remote control device according to this embodiment, FIG. 2 is a conceptual diagram of a water cannon, and FIG. 3 is a conceptual diagram of a barrel of the water cannon. The water cannon remote control device comprises a water cannon 10 that sprays extinguishing agent, a cylinder 20 that has a piston 21 and is used to change the direction or flow rate of the water cannon 10, a changeover valve 30 that is used to control the operation of the cylinder 20, a flexible transport pipe 40 that connects the cylinder 20 and the changeover valve 30 and through which the working fluid flows, a hose reel 50 around which the transport pipe 40 is wound, a first joint 60 provided on the changeover valve 30 side, and a second joint 70 provided on the cylinder 20 side. The cylinder 20 is attached to the water cannon 10, and the changeover valve 30 is positioned sufficiently away from the water cannon 10. The working fluid flowing through the transport pipe 40 is a fluid supplied from the outside via the switching valve 30, and is used to operate the cylinder 20. The transport pipe 40 is, for example, a pressure-resistant nylon tube. One end of the transport pipe 40 is connected to a first joint 60, and the other end of the transport pipe 40 is connected to a second joint 70. The first joint 60 and the switching valve 30 are connected by a switching valve connecting pipe 41, and the second joint 70 and the cylinder 20 are connected by a cylinder connecting pipe 42. The switching valve connecting pipe 41, the transport pipe 40, and the cylinder connecting pipe 42 form a continuous flow path through which the working fluid flows.

[0018] The cylinder 20 is provided with three components: a first cylinder 20A that moves the barrel 11 left and right (horizontally), a second cylinder 20B that moves the nozzle 12 up and down (vertically), and a third cylinder 20C that changes the spray flow rate of the nozzle 12. The switching valves 30 are provided with three components: a first switching valve 30A that is connected to the first cylinder 20A by two flow paths, a second switching valve 30B that is connected to the second cylinder 20B by two flow paths, and a third switching valve 30C that is connected to the third cylinder 20C by two flow paths. In this way, two continuous flow paths made up of the switching valve connecting pipe 41, the transport pipe 40, and the cylinder connecting pipe 42 are assigned to each pair of cylinders 20 and switching valves 30.

[0019] Each switching valve 30 is supplied with a fluid used as a working fluid from a supply pipe 80, one end of which is connected to a valve 90. The switching valve 30 is, for example, a solenoid valve, which opens and closes based on a signal sent from a controller or the like carried by a firefighter, and controls the operation of the cylinder 20 by switching between supplying and not supplying the working fluid. Note that the switching valve 30 may also be a manual valve that can be directly operated by a firefighter. The supply pipe 80 can be configured as a branch from a hose connected to a fire engine, in which case part of the fire extinguishing agent discharged from the fire engine can be used as the working fluid. By using pressurized water from the fire engine as the working fluid for the cylinder 20, working fluid can be easily secured at various fire scenes.

[0020] The interior of each cylinder 20 is divided into two volume chambers by a piston 21 journalled on a piston shaft 22, and one end of a cylinder connecting pipe 42 is connected to each of the two volume chambers. Each chamber of the cylinder 20 is provided with a communication passage 23 that communicates with the outside, and a fixed throttle 24 is disposed in the communication passage 23. By providing a communication passage 23 that connects each chamber to the atmosphere and has a fixed throttle 24 interposed therein, when the pressure of the working fluid is applied, the air inside the cylinder 20 is automatically discharged from the communication passage 23 by the fluid pressure, eliminating the need for firefighters to vent the gas before commencing firefighting activities, allowing firefighting activities to begin more quickly. In addition, by continuously discharging a portion of the working fluid from the communication passage 23, it is possible to continuously supply a constant flow rate of working fluid to the cylinder 20, which makes it possible to suppress the temperature rise of the cylinder 20 in a fire environment, particularly when the working fluid is water. Furthermore, instead of or in addition to the fixed orifice 24, a spray nozzle with a small flow rate can be provided in the communication passage 23 so that, when the working fluid is water, the discharged working fluid is sprayed into the cylinder 20. This spray serves as a self-protection spray that suppresses a temperature rise in the cylinder 20.

[0021] The working fluid is preferably water, air, or a mixture of water and air, which allows a fluid that is relatively easy to obtain and handle to be used as the working fluid. Furthermore, particularly when water is used as the working fluid, it is preferable that water be continuously supplied to each chamber of the cylinder 20, except for the chamber on the discharge (drainage) side, while the water cannon 10 is spraying the extinguishing agent. This allows water vapor generated by the heat of the fire inside the cylinder 20 and air mixed in to be discharged into the atmosphere when the water cannon 10 is operating, allowing for more stable control of the cylinder 20. The cylinder 20 is shaped so that the pressure-receiving area is equal on both sides of the piston 21. This allows the piston 21 to stop at a desired position even if pressure from the working fluid is continuously applied to the cylinder 20, ensuring stable control of the water cannon 10 by the cylinder 20.

[0022] As shown in Figures 2 and 3, a cylinder 20 is attached to the water cannon 10. The barrel 11 of the water cannon 10 is provided with a swiveling rotating part 13 that rotates due to the reciprocating motion of the piston 21 in the first cylinder 20A, and an elevation rotating part 14 that rotates due to the reciprocating motion of the piston 21 in the second cylinder 20B, giving it two degrees of freedom: swiveling and elevation (raising and lowering). In addition, the nozzle 12 of the water cannon 10 is provided with a third cylinder 20C for changing the spray flow rate.

[0023] Figure 4 is a conceptual diagram showing transport pipes collected in a collecting pipe, and Figure 5 is a conceptual diagram of a hose reel. All of the transport pipes 40 are housed within a flexible collecting pipe 100. The collecting pipe 100 has a collecting pipe-side male thread 101 at one end and a collecting pipe-side female thread 102 at the other end. The collecting pipe-side male thread 101 and the collecting pipe-side female thread 102 are connected to the second joint-side female thread 73 of the insert 76 (see Figure 7) and the first joint-side male thread 63 of the first joint 60 (see Figure 6), respectively. The collecting pipe 100 can be stored by being wound up on the hose reel 50, and when in use, the collecting pipe 100 is unfolded from the hose reel 50 and the tip (one end) is connected to the receiving fitting 77 of the second joint 70 (see FIG. 7). The collecting pipe 100 is a shape-retaining hose that can be used for fire fighting activities, for example, and the hose reel 50 is a hose winding device that winds up the shape-retaining hose. A first joint 60, which is a rotatable rotary joint, is coaxially mounted on the rotation shaft of the hose reel 50 and protrudes outward on one side, so that when the rotation shaft of the hose reel 50 rotates, the first joint 60 also rotates. By arranging the first joint 60 as a rotary joint coaxially with the rotation shaft of the hose reel 50 and by collecting multiple transport pipes 40 into a single collecting pipe 100, the transport pipes 40 can be wound and unwound more quickly than when a non-rotatable joint is used or when the transport pipes 40 are wound individually around the hose reel 50. Furthermore, in this embodiment, the working fluid is flowed between the collecting pipe 100 and the transport pipes 40 and between the transport pipes 40. As a result, the collecting pipe 100 also serves as one of the transport pipes, so the number of transport pipes 40 arranged inside the collecting pipe 100 can be reduced by one. Furthermore, when the working fluid flowing through the collecting pipe 100 is water, the transport pipes 40 arranged inside the collecting pipe 100 are cooled by the water, which also contributes to improving heat resistance. Furthermore, a communication cable connected to a camera that takes pictures of the fire spot can also be housed in the collecting pipe 100. By housing the communication cable in the collecting pipe 100, the image data of the fire spot and the like can be protected from heat, water intrusion, and the like, and image data of the fire spot and the like can be transmitted stably to firefighters and the like.

[0024] FIG. 6 is a diagram showing the internal structure of the first joint. The first joint 60 has a switching valve connection pipe joint 61 to which one end of the switching valve connection pipe 41, the other end of which is connected to the switching valve 30, a one-end transport pipe joint 62 to which one end of the transport pipe 40 is connected, and a first joint-side male thread 63 that connects to the collecting pipe-side female thread 102, and is internally formed with a plurality of first flow paths 64 through which the working fluid flows, the number of which corresponds to the number of transport pipes 40. In addition, an O-ring 65 is arranged adjacent to the first flow paths 64 in the circumferential direction. Note that a total of six one-end transport pipe joints 62 are provided, but only one of them is shown in FIG. 6. Five of the six switching valve connecting pipe joints 61 are provided perpendicular to the longitudinal axis of the first joint 60, and one is provided parallel to the longitudinal axis of the first joint 60 at the end opposite to the end where the first joint side male thread 63 is provided. In addition, the six one-end side transport pipe joints 62 are provided parallel to the longitudinal axis of the first joint 60 with their heads facing the end where the first joint side male thread 63 is provided. Of the five switching valve connection pipe joints 61 provided perpendicular to the longitudinal axis of the first joint 60, the first and second, counting from the side closest to the first joint side male thread 63, are connected to the other end of the switching valve connection pipe 41 leading to the first switching valve 30A, the third and fourth are connected to the other end of the switching valve connection pipe 41 leading to the second switching valve 30B, and the fifth is connected to the other end of the switching valve connection pipe 41 leading to the third switching valve 30C. In addition, the one switching valve connection pipe joint 61 provided parallel to the longitudinal axis of the first joint 60 is connected to the other end of the switching valve connection pipe 41 leading to the third switching valve 30C. The working fluid that flows in from the switching valve connecting pipe joint 61 passes through the first flow path 64 and the one-end transport pipe joint 62, and flows into the transport pipe 40. In this embodiment, as described above, the collecting pipe 100 also functions as a transport pipe, and the working fluid that flows in from the switching valve connecting pipe joint 61, which is provided parallel to the longitudinal axis of the first joint 60, passes through the first flow path 64 and the one-end transport pipe joint 62, and flows into the gap in the collecting pipe 100. The first joint 60, which is a rotary joint, rotates on the side where the first joint side male thread 63 is provided as the hose reel 50 rotates. It is also possible to pass the working fluid continuously while rotating. Furthermore, since the first joint 60 has a plurality of flow paths connected to the respective transport pipes 40 , the working fluid can be quickly supplied from the switching valve 30 to the cylinder 20 .

[0025] FIG. 7 is a diagram showing the internal structure of the second joint. The second joint 70 has a cylinder connecting pipe joint 71 to which is connected one end of the cylinder connecting pipe 42, the other end of which is connected to the cylinder 20, an other-end transport pipe joint 72 to which is connected the other end of the transport pipe 40, and a second joint-side female thread 73 that connects to the collecting pipe-side male thread 101, and is internally provided with a plurality of second flow passages 74 through which the working fluid flows, the number of which corresponds to the number of transport pipes 40. An O-ring 75 is also arranged adjacent to the second flow passages 74 in the circumferential direction. A total of six other-end transport pipe joints 72 are provided, but only one of them is shown in FIG. 7. Five of the six cylinder connecting pipe joints 71 are provided perpendicular to the longitudinal axis of the second joint 70, and one is provided parallel to the longitudinal axis of the second joint 70 at the end opposite to the end where the second joint side female thread 73 is provided. In addition, the six other end side transport pipe joints 72 are provided parallel to the longitudinal axis of the second joint 70 with their heads facing the end where the second joint side female thread 73 is provided. Of the five cylinder connection pipe joints 71 provided perpendicular to the longitudinal axis of the second joint 70, the first and second, counting from the side closest to the second joint side female thread 73, are connected to the other end of the cylinder connection pipe 42 leading to the first cylinder 20A, the third and fourth are connected to the other end of the cylinder connection pipe 42 leading to the second cylinder 20B, and the fifth is connected to the other end of the cylinder connection pipe 42 leading to the third cylinder 20C. Furthermore, the other end of the cylinder connection pipe 42 leading to the third cylinder 20C is connected to one cylinder connection pipe joint 71 provided parallel to the longitudinal axis of the second joint 70. The working fluid that flows in from the other end side transport pipe joint 72 passes through the second flow path 74, the cylinder connecting pipe joint 71, and flows into the cylinder connecting pipe 42. The working fluid that has flowed through the gap in the collecting pipe 100 passes through the cylinder connecting pipe joint 71, which is provided parallel to the longitudinal axis of the second joint 70, and flows into the cylinder connecting pipe 42 that is connected to the third cylinder 20C.

[0026] The second joint 70 is a plug-in type joint that includes a metal insert 76 and a metal receiving bracket 77. While a plug-in type joint is easy to connect and disconnect, there is a possibility that the push ring 78 may move in the disconnection direction due to an impact or the hose getting caught, resulting in unintentional disconnection. For this reason, the second joint 70 is preferably provided with an unexpected disconnection prevention mechanism that prevents the connection between the metal insert 76 and the metal receiving bracket 77 from being suddenly released. As an example of an unexpected separation prevention mechanism, as described in JP 2016-014477 A, an anti-slip groove is provided on the outer peripheral surface of the metal insert 76, and a gap is provided between the inner and outer peripheral surfaces of the press ring 78. This makes it possible to prevent the metal insert 76 from unintentionally separating from the metal receiving bracket 77.

[0027] By using the water cannon remote control device described above, the firefighter in charge of spraying the water cannon can place the water cannon 10 near the fire and remotely operate it using a controller or the like, allowing him or her to continue spraying the fire extinguishing agent toward the fire without being harmed by radiant heat or hot air. In addition, since the water cannon remote control device changes the direction of the water cannon 10 and adjusts the amount of spray using fluid pressure such as water or air, it can be used even in harsh fire environments where it is exposed to high temperatures and large amounts of water. Furthermore, since the switching valve 30 can be installed sufficiently far from the water cannon 10, it is possible to prevent the switching valve 30 from breaking down due to exposure to high temperatures or large amounts of water. In addition, the firefighters in charge of operating the water cannon 10 can control the water discharge from a sufficient distance from the water cannon 10. [Explanation of symbols]

[0028] 10 Water Cannon 20 cylinders 20A First Cylinder 20B Second cylinder 20C Third Cylinder 21 Piston 22 Piston shaft 23 Communication path 24 Fixed Aperture 30 Switching valve 30A first switching valve 30B Second switching valve 30C Third switching valve 40 Transport pipe 50 Hose reel 60 First Joint 64 First Channel 70 Second joint 76 Insert 77 Bracket 78 Push Ring 100 Collecting pipe

Claims

1. A water cannon that sprays fire extinguishing agents, a cylinder attached to the water cannon, having a volume chamber partitioned by a piston, and actuated by a hydraulic fluid to change the direction of the water cannon; a switching valve that controls the operation of the cylinder by switching between supply and non-supply of the working fluid; Equipped with The cylinder may be: a first cylinder for moving the barrel of the water cannon horizontally; a second cylinder for vertically moving the nozzle of the water cannon; and The switching valve includes: a first switching valve connected to the first cylinder; a second switching valve connected to the second cylinder; and a switching valve connection pipe for each of the first switching valve and the second switching valve is connected to a first joint; a cylinder connecting pipe of each of the first cylinder and the second cylinder is connected to a second joint; the first joint is a rotatable rotary joint and is arranged coaxially with the rotation axis of the hose reel; A plurality of transport pipes corresponding to the respective switching valve connecting pipes are wound around the hose reel, the transport tube is flexible; The hydraulic fluid is supplied from the switching valve to the cylinder through the transport pipe; By connecting a plurality of the transport pipes to the second joint, the switching valve is installed away from the water cannon depending on the length of the transport pipes. A water cannon remote control device characterized by the above.

2. A water cannon remote control device as described in Claim 1, characterized in that multiple transport pipes are combined into a single collecting pipe.

3. 3. The remote control device for a water cannon according to claim 1, wherein the cylinder has a communication passage in each of the volume chambers that communicates with the outside, and a fixed throttle is provided in the communication passage.

4. 4. The water cannon remote control device according to claim 1, wherein, when the water cannon is in operation, the working fluid is continuously supplied to the volume chambers of the cylinder, except for the volume chamber on the discharge side.

5. 5. The remote control device for a water cannon according to claim 4, wherein the cylinder has equal pressure-receiving areas on both sides of the piston.

6. 6. The water cannon remote control device according to claim 1, wherein the working fluid is water, air, or a mixture of water and air.

7. The water cannon remote control device according to any one of claims 1 to 6, wherein the first joint has a plurality of flow paths connected to the transport pipe.

8. The water cannon remote control device according to any one of claims 1 to 7, characterized in that the second joint has a metal insert and a metal receiving bracket, and is provided with an unexpected separation prevention mechanism that prevents the connection between the metal insert and the metal receiving bracket from being unexpectedly released.

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