Lateral folding arm type portable fire-fighting unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, and discloses a lateral folding arm type portable fire-fighting unmanned aerial vehicle, which aims to solve the problem of adaptation between the portability and the fire extinguishing range of the fire-fighting unmanned aerial vehicle, and comprises a four-rotor explosion-proof unmanned aerial vehicle, shear type folding arms are arranged on two sides of a bottom take-off and landing bracket, and a water distribution pipe is fixed at the bottom through a pipeline buckle; central telescopic pipes with pistons are inserted into the two ends of the water distribution pipe, the pistons are in linkage with the folding arms through positioning pins, the central telescopic pipes are connected with a plurality of sets of movable fire extinguishing pipes and telescopic pipes, nozzles are formed in the tail ends of the telescopic pipes, plugging rings and conical plugging blocks are arranged on the inner sides of the telescopic pipes, and reset springs are arranged between the plugging blocks. According to the portable fire extinguishing device, automatic unfolding of the folding arm and synchronization of water spraying are achieved by means of water pressure, portability and the fire extinguishing coverage range are both considered, and the emergency efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and more particularly to a portable firefighting UAV with a side-folding arm. Background Technology

[0002] With the acceleration of urbanization and the improvement of fire safety awareness, the application of drones in the field of fire protection is receiving increasing attention. Traditional fire-fighting equipment is often bulky and complex to operate, making it difficult to quickly deploy to complex terrain or high-altitude fire scenes. Although some existing fire-fighting drones can carry fire extinguishing agents for aerial operations, they still have limitations in terms of portability, deployment speed, and fire-fighting efficiency.

[0003] For example, existing firefighting drones, when carrying fire extinguishing equipment, typically have fixed dimensions, which makes them inflexible in terms of storage, transportation, and rapid deployment. In confined spaces or emergency situations requiring rapid response, the large size of the drones limits their operational range and efficiency. Furthermore, some firefighting drones may require additional mechanical structures to adjust the spray direction and range when spraying extinguishing agents, increasing system complexity and failure rate. Summary of the Invention

[0004] The technical problem to be solved by this invention is the shortcomings of existing fire-fighting drones in terms of portability, deployment speed, and fire-fighting efficiency. To address this, we propose a portable fire-fighting drone with a side-folding arm.

[0005] To achieve the above objectives, this application adopts the following technical solution: a side-folding arm-type portable firefighting drone, comprising: a quadcopter explosion-proof drone, with a landing frame fixedly connected to the bottom of the quadcopter explosion-proof drone, and a set of folding arms fixedly connected to each side of the landing frame. The folding arms are used to reduce the size of the equipment when stored and expand the operating range. Each folding arm includes a first folding arm and a second folding arm. Two or more sets of the first and second folding arms are rotatably connected in sequence, and they intersect to form a scissor structure. A central rotating shaft is provided at the center of the intersection, through which relative rotation is achieved to complete the folding and unfolding actions. A water distribution pipe is provided at the bottom of the landing frame, with a central telescopic pipe inserted into each end of the water distribution pipe. A piston is connected to the end of the central telescopic pipe, and the piston slides and seals against the inner wall of the water distribution pipe, allowing it to move along the pipe axis under the action of a high-pressure water source to transmit driving force. A first positioning pin is fixedly connected to the central rotating shaft, and the first positioning pin is fixedly connected to the central telescopic pipe to transmit the driving force of the piston to the folding arm. One end of the central telescopic pipe... Two or more sets of movable fire extinguishing hoses are connected in sequence via corrugated hoses. The corrugated hoses are adapted to the movement of the folding arm to maintain water flow. A first telescopic tube and a second telescopic tube are inserted into both ends of the movable fire extinguishing hoses, respectively. A first nozzle and a second nozzle are respectively provided at the ends of the first telescopic tube and the second telescopic tube for spraying fire extinguishing medium. A second positioning pin and a third positioning pin are respectively fixedly connected to the ends of the first folding arm and the second folding arm. The second positioning pin is fixedly connected to the first telescopic tube, and the third positioning pin is fixedly connected to the second telescopic tube to realize the linkage extension and retraction of the folding arm and the movable fire extinguishing hose. A first sealing ring is provided on the inner side of the first telescopic tube. The first sealing ring is fixedly connected to the water distribution pipe. A first sealing block is tightly inserted in the first sealing ring to block the water flow channel when the folding arm is not unfolded. A first push rod is fixedly connected to the end of the first telescopic tube to push against the first sealing block when unfolded. A second sealing ring is provided on the inner side of the second telescopic tube. A second sealing block is tightly inserted in the second telescopic ring. A second push rod is fixedly connected to the end of the second telescopic tube. The two work together to realize the synchronous opening and closing of the water flow channel.

[0006] Furthermore, the folding arm is configured with two layers, with the two folding arms on both sides parallel to each other, and the two layers of folding arms are connected by a first positioning pin, a second positioning pin and a third positioning pin in sequence. This double-layer structure can enhance the structural stability of the folding arm after it is unfolded, ensure that the movable fire extinguishing pipe extends and retracts synchronously, and improve the load-bearing capacity during high-pressure water spraying operations.

[0007] Furthermore, the folding arm is made of lightweight aluminum alloy, which enables the overall weight reduction of the drone to reduce flight energy consumption, while ensuring the structural strength during the folding and unfolding process, thus balancing portability and operational reliability.

[0008] Furthermore, a set of connecting blocks are fixedly connected to each side of the lifting and lowering bracket. Each connecting block has a fixed slot. A guide rod connecting block is provided on one side of the connecting block. A fixed insert is integrally provided on the guide rod connecting block. The fixed insert is inserted into the fixed slot and fixed with bolts to form a detachable connection structure for easy maintenance and replacement. A sliding guide rod is passed through and fixedly connected to the guide rod connecting block. A first connecting block and a second connecting block are slidably connected to the sliding guide rod. The first connecting block is rotatably connected to the first folding arm, and the second connecting block is rotatably connected to the second folding arm. The sliding guide rod provides guidance and limit for the movement of the folding arm to ensure its trajectory stability.

[0009] Furthermore, two sliding guide rods are provided, which are parallel to each other and set vertically to form a two-way guiding constraint structure. This can effectively prevent vertical deflection when the folding arm is folded and unfolded, and ensure the synchronization accuracy of the movement of the movable fire extinguishing pipe and the folding arm.

[0010] Furthermore, a fixed bracket is bolted to the bottom of the take-off and landing support, and a pipe clip is fixedly connected to the bottom of the fixed bracket. The pipe clip engages with the water distribution pipe. This fixed structure can prevent the water distribution pipe from shifting due to water flow impact or vibration during drone flight and water spraying operations, thus ensuring the stability of water pressure transmission.

[0011] Furthermore, a quick-connect buckle is installed at the center of the water distribution pipe for connecting the water pipe. The quick-connect buckle has the function of quickly connecting to a high-pressure water source, which can shorten the emergency deployment time, while ensuring the sealing reliability after connection and preventing water pressure leakage from affecting the driving and water spraying effect.

[0012] Furthermore, there are two or more sets of movable fire extinguishing pipes, and the number of movable fire extinguishing pipes is the same as the number of the first folding arm and the second folding arm. Adjacent movable fire extinguishing pipes are connected by corrugated hoses. The matching design allows the movable fire extinguishing pipes to extend synchronously when the folding arm is unfolded to expand the coverage area. The deformable characteristics of the corrugated hoses are adapted to mechanical movement to ensure that the water flow channel is always unobstructed.

[0013] Furthermore, both the first and second sealing blocks are conical, and rubber sealing rings are provided between them and the first and second sealing rings. The conical structure facilitates quick disengagement from the sealing rings when the push rod is pushed, and the rubber sealing rings can enhance the sealing performance and ensure that water pressure is concentrated on the piston when the folding arm is not unfolded.

[0014] Furthermore, a reset spring is provided between the first and second sealing blocks. The reset spring can drive the sealing blocks to reset and seal the nozzle when the equipment is stored, and at the same time provide a buffer when it is opened to avoid rigid collision damage to the components.

[0015] The technical effects and advantages of this invention are as follows: 1. By adopting a scissor-type folding arm structure combined with a water-pressure driven automatic deployment mechanism, the size of the fire-fighting drone in its folded state is significantly reduced, improving the portability and transportation efficiency of the equipment, enabling the drone to be quickly deployed to emergency fire scenes. 2. Utilizing a high-pressure water source to drive the piston movement, automatically driving the folding arm to unfold and simultaneously opening the fire extinguishing nozzle, simplifies the complex operation that previously required manual or additional motor drive to a single water pressure input, greatly shortening emergency deployment time and improving response speed. 3. When the folding arm is not unfolded, the first and second sealing blocks effectively block the water flow channel, preventing accidental spraying of the fire extinguishing medium and ensuring the safety and stability of the drone during flight and deployment. When the folding arm is unfolded, the first and second push rods simultaneously push open the sealing blocks, ensuring smooth water flow to the nozzle for precise fire extinguishing. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the upper external structure of the present invention; Figure 2 This is a schematic diagram of the bottom external structure of the present invention; Figure 3 This is a schematic diagram of the take-off and landing support and folding arm structure of the present invention; Figure 4 This is a schematic diagram of the quick-connect buckle structure of the present invention; Figure 5 This is a schematic diagram of the folding arm structure of the present invention; Figure 6 This is a schematic diagram of the folding arm connection structure of the present invention; Figure 7 This is a schematic diagram of the planar structure of the folding arm of the present invention; Figure 8 This is a schematic diagram of the water distribution pipe structure of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of section A; Figure 10 This is a schematic cross-sectional view of the water distribution pipe of the present invention; Figure 11 This is a cross-sectional view of the movable fire extinguishing pipe of the present invention.

[0017] Legend: 1. Quadcopter explosion-proof UAV; 2. Take-off and landing bracket; 3. Folding arm; 301. First folding arm; 302. Second folding arm; 303. Central rotation axis; 304. First positioning pin; 305. Second positioning pin; 306. Third positioning pin; 4. Connecting fixing block; 401. Fixing slot; 5. Guide rod connecting block; 501. Fixing insert; 6. Sliding guide rod; 7. First connecting block; 8. Second connecting block; 9. Fixing support 10. Pipe clamp; 11. Water distribution pipe; 12. Quick-connect clamp; 13. Central telescopic pipe; 14. Piston; 15. Movable fire extinguishing pipe; 16. First telescopic pipe; 1601. First nozzle; 1602. First push rod; 17. Second telescopic pipe; 1701. Second nozzle; 1702. Second push rod; 18. First sealing ring; 19. First sealing block; 20. Second sealing ring; 21. Second sealing block; 22. Return spring. Detailed Implementation

[0018] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Example 1

[0019] like Figures 1-11 As shown, the present invention provides a side-folding arm type portable fire-fighting drone. Its overall structure is designed to achieve efficient fire extinguishing and excellent portability. The core of the drone includes a quadcopter explosion-proof drone 1. The take-off and landing bracket 2 set at the bottom of the drone not only provides support for the drone, but also serves as the core installation platform for the entire fire extinguishing system.

[0020] On both sides of the take-off and landing bracket 2, a set of folding arms 3 are fixedly connected. These folding arms 3 are key components for realizing the reduction of UAV size and the expansion of operating range. Each set of folding arms 3 consists of two or more sets of first folding arms 301 and second folding arms 302 that are rotatably connected in sequence. They cross each other to form a scissor structure. This scissor structure allows the folding arms to retract and unfold like scissors. At the center intersection of the first folding arm 301 and the second folding arm 302, a central rotation shaft 303 is provided. This shaft allows the two folding arms to rotate relative to each other, thereby completing the folding and unfolding operation of the folding arms.

[0021] At the bottom of the lifting support 2, a water distribution pipe 11 is strategically installed. The water distribution pipe 11 is the main channel for the transmission of fire extinguishing medium. A central telescopic pipe 13 is inserted into each end of the pipe. A piston 14 is connected to the end of each central telescopic pipe 13. The piston 14 is tightly slidably sealed with the inner wall of the water distribution pipe 11. This means that under the action of an external high-pressure water source, the piston 14 can move axially within the water distribution pipe 11 and transmit the driving force of the high-pressure water.

[0022] In order to accurately transmit this driving force to the folding arm 3, a first positioning pin 304 is fixedly connected to the central rotating shaft 303. This first positioning pin 304 is further fixedly connected to the central telescopic tube 13. Therefore, when the high-pressure water pushes the piston 14 and the central telescopic tube 13 to move, the first positioning pin 304 will drive the central rotating shaft 303 to rotate, thereby driving the folding arm 3 to unfold.

[0023] At the other end of the central telescopic pipe 13, two or more sets of movable fire extinguishing pipes 15 are connected in sequence via corrugated hoses. The design of the corrugated hose is crucial. It has good flexibility and extensibility, and can adapt to deformation during the movement of the folding arm 3, always maintaining the continuity of the water flow channel and ensuring that the fire extinguishing medium is not interrupted due to the extension and retraction of the folding arm. The movable fire extinguishing pipe 15 is the channel for directly spraying the fire extinguishing medium. Each movable fire extinguishing pipe 15 has a first telescopic pipe 16 and a second telescopic pipe 17 inserted at both ends. The ends of the first telescopic pipe 16 and the second telescopic pipe 17 are respectively provided with a first nozzle 1601 and a second nozzle 1701. These nozzles are the outlets for the final spraying of the fire extinguishing medium.

[0024] To achieve the coordinated extension and retraction of the folding arm 3 and the movable fire extinguishing pipe 15, the ends of the first folding arm 301 and the second folding arm 302 are respectively fixedly connected with a second positioning pin 305 and a third positioning pin 306. The second positioning pin 305 is fixedly connected to the first telescopic tube 16, while the third positioning pin 306 is fixedly connected to the second telescopic tube 17. Through this ingenious connection, when the folding arm 3 is unfolded, it will simultaneously drive the first telescopic tube 16 and the second telescopic tube 17 to extend, thereby enabling the fire extinguishing pipe 15 to extend and retract to adapt to the extended length of the folding arm 3. Conversely, when the folding arm 3 is folded, the movable fire extinguishing pipe 15 will also retract synchronously.

[0025] In order to effectively block the water flow channel and concentrate water pressure to drive the piston 14 when the folding arm 3 is not unfolded, the present invention designs a blocking mechanism. Specifically, a first blocking ring 18 is provided on the inner side of the first telescopic tube 16. The first blocking ring 18 is fixedly connected to the water distribution pipe 11. A first blocking block 19 is tightly inserted inside the first blocking ring 18. When the folding arm 3 is in the folded state, the first blocking block 19 can completely block the water flow channel. A first push rod 1602 is fixedly connected to the end of the first telescopic tube 16. When the folding arm 3 is unfolded, the first telescopic tube 16 extends, and the first push rod 1602 pushes against the first blocking block 19, pushing it out of the first blocking ring 18, thereby opening the water flow channel.

[0026] Similarly, a second sealing ring 20 is provided on the inner side of the second telescopic tube 17, and a second sealing block 21 is tightly inserted inside it. A second push rod 1702 is fixedly connected to the end of the second telescopic tube 17. These two components work together to realize the synchronous opening and closing of the water flow channel. That is, when the folding arm is unfolded, the second push rod 1702 pushes the second sealing block 21 to open the water flow channel; when the folding arm is folded, the sealing block resets and blocks the water flow channel.

[0027] In use, first connect the quick-connect buckle 12 to the external high-pressure water source. The high-pressure water source enters the water distribution pipe 11. Since the nozzle is in a blocked state at this time, i.e., the first blocking block 19 and the second blocking block 21 block the water flow channel, the water pressure will be concentrated on the piston 14. Under the push of the water pressure, the piston 14 drives the central telescopic tube 13 to move, which drives the central rotating shaft 303 to rotate through the first positioning pin 304, thereby causing the folding arm 3 to unfold outward. As the folding arm 3 unfolds, the second positioning pin 305 and the third positioning pin 306 respectively drive the first telescopic tube 13 to move. The first telescopic tube 16 and the second telescopic tube 17 extend outwards. The extension of the first telescopic tube 16 and the second telescopic tube 17 causes the corresponding push rods at their ends, namely the first push rod 1602 and the second push rod 1702, to push against the sealing blocks located inside them, namely the first sealing block 19 and the second sealing block 21. The sealing blocks are pushed out of the sealing ring, the water flow channel is opened, and the fire extinguishing medium can be sprayed out from the first nozzle 1601 and the second nozzle 1701 to carry out fire extinguishing operations. This automatic deployment and nozzle opening mechanism based on water pressure greatly simplifies the operation process and improves the emergency response speed. Example 2

[0028] Based on Embodiment 1, in order to further enhance the structural stability of the folding arm 3 after it is unfolded and its load-bearing capacity during high-pressure water spraying operations, this embodiment optimizes the structure of the folding arm 3.

[0029] like Figure 1 and Figure 5 As shown, the folding arm 3 can be configured as a double-layer structure. Specifically, the folding arms 3 connected to the lifting brackets 2 on both sides are configured as two layers, and the two layers of folding arms 3 are arranged in parallel to each other. In order to ensure that the double-layer structure can work together and transmit driving force, the two layers of folding arms 3 are connected through the first positioning pin 304, the second positioning pin 305 and the third positioning pin 306 in sequence. That is, these positioning pins pass through the corresponding positions of the upper and lower layers of folding arms and firmly connect them together.

[0030] This double-layer structure design allows the folding arm to form a more robust and stable geometric support after unfolding. It can effectively resist the reaction force and flight vibration generated by the high-pressure water jet, enhancing the overall rigidity of the structure. This not only ensures the synchronization accuracy of the fire extinguishing pipe 15 during the extension and retraction process, avoiding possible jamming or deformation, but more importantly, it significantly improves the load-bearing capacity of the drone when carrying out high-pressure water jet fire extinguishing operations. This means that the drone can hover more stably above the target area, and carry out efficient fire extinguishing at a greater distance and with a larger flow rate, thereby improving the reliability and safety of fire fighting operations.

[0031] In addition, in order to reduce the overall weight of the UAV and reduce flight energy consumption, while ensuring the structural strength of the folding arm 3 during folding and unfolding, this embodiment preferably selects lightweight aluminum alloy as the material for the folding arm 3. Lightweight aluminum alloy has an excellent strength-to-weight ratio, which can significantly reduce the takeoff weight of the UAV and extend its loiter time. At the same time, its good mechanical properties ensure the reliability of the folding arm when it is subjected to repeated movements and external loads, taking into account both portability and operational reliability. This material selection not only conforms to the lightweight design trend of aircraft, but also meets the high requirements of fire-fighting equipment for strength and durability. Example 3

[0032] Based on Embodiment 2, this embodiment further refines and optimizes the motion guidance and water flow distribution structure of the folding arm 3 to ensure the stability of the folding arm's motion trajectory, the reliability of the water pipe connection, and the working efficiency of the sealing mechanism.

[0033] like Figure 5 and Figure 6 As shown, in order to provide stable and detachable support and guidance, a set of connecting fixing blocks 4 are fixedly connected to each side of the lifting bracket 2. A fixing slot 401 is provided on each connecting fixing block 4. A guide rod connecting block 5 is also provided on one side of the connecting fixing block 4. A fixing insert 501 is integrally provided on the guide rod connecting block 5. The fixing insert 501 can be accurately inserted into the fixing slot 401 and fixed by bolts. This design forms a detachable connection structure, which greatly facilitates the maintenance, inspection and replacement of the folding arm 3, reduces the difficulty and cost of maintenance, and shortens the downtime.

[0034] A sliding guide rod 6 is connected through and fixed to the guide rod connecting block 5. The sliding guide rod 6 is the track for the movement of the folding arm 3. A first connecting block 7 and a second connecting block 8 are slidably connected to the sliding guide rod 6. The first connecting block 7 is rotatably connected to the first folding arm 301, and the second connecting block 8 is rotatably connected to the second folding arm 302. Through this connection method, the sliding guide rod 6 provides precise guidance and limit for the movement of the folding arm 3. It ensures that the folding arm 3 always moves smoothly along the preset straight trajectory during the folding and unfolding process, effectively avoiding deflection, jamming or structural damage, thereby ensuring the stability of its movement.

[0035] To further enhance guiding accuracy and effectively prevent the folding arm 3 from deflecting vertically during folding and unfolding, and to ensure the synchronization accuracy of the movement of the movable fire extinguishing pipe 15 and the folding arm 3, preferably, two sliding guide rods 6 are provided. These two sliding guide rods 6 are parallel to each other and arranged vertically to form a two-way guiding constraint structure. This dual-track design provides stronger anti-torsion and anti-deflection capabilities, making the movement of the folding arm more precise and reliable. Especially in high-speed or high-load operating environments, its stability advantage is more prominent.

[0036] like Figures 8-11 As shown, in order to ensure the stability of the water distribution pipe 11 under the impact of high-pressure water flow or the vibration of the UAV during flight, a fixed bracket 9 is fixedly connected to the bottom of the landing support 2 by bolts. The bottom of the fixed bracket 9 is further fixedly connected to a pipe clip 10. The pipe clip 10 is U-shaped or ring-shaped and can tightly engage with the water distribution pipe 11. This fixing structure effectively fixes the water distribution pipe 11 firmly to the landing support 2, avoiding displacement, loosening or falling off of the water distribution pipe 11 due to water flow impact or UAV vibration during UAV flight, especially during high-pressure water spraying operations, thereby ensuring the stability of water pressure transmission and the reliable operation of the system.

[0037] At the center of the water distribution pipe 11, there is a quick-connect buckle 12 for connecting to an external water pipe. This quick-connect buckle 12 has a high-pressure water source quick connection function. Its design allows operators to quickly and reliably connect an external high-pressure water source, such as a fire truck or water pump, to the drone's fire-fighting water line in the shortest possible time. This quick connection capability greatly shortens the emergency deployment time, which is crucial for fire rescue where every second counts. At the same time, the quick-connect buckle 12 can provide excellent sealing reliability after connection, effectively preventing leakage under high-pressure water flow, thereby ensuring the driving water pressure acting on the piston 14 and the final sprayed water flow effect, ensuring the effectiveness of fire-fighting operations.

[0038] To optimize the performance of the sealing mechanism, there are two or more sets of movable fire extinguishing pipes 15, and the number of movable fire extinguishing pipes 15 matches the number of the first folding arm 301 and the second folding arm 302. Adjacent movable fire extinguishing pipes 15 are connected by corrugated hoses. This matching design ensures that when the folding arm 3 is unfolded, the fire extinguishing pipes 15 can extend synchronously, maximizing the fire extinguishing coverage. The deformable characteristics of the corrugated hose maintain the water flow channel throughout the entire mechanical movement, so that the water can flow smoothly even when the folding arm is bent or extended.

[0039] To improve the reliability of the sealing effect and the smoothness of the push rod push, preferably, both the first sealing block 19 and the second sealing block 21 are conical. The conical structure allows the push rod to disengage from the sealing ring more quickly and smoothly when pushing the sealing block, reducing the possibility of jamming and improving the opening response speed. In addition, since the conical structure can provide a tighter fit when fully inserted, it enhances the sealing effect. To further enhance the sealing performance and prevent any water pressure leakage, a rubber sealing ring is additionally provided between the first sealing block 19 and the second sealing block 21 and the first sealing ring 18 and the second sealing ring 20. The rubber sealing ring has good elasticity and sealing performance, ensuring that when the folding arm 3 is not unfolded, the water pressure can be fully concentrated on the piston 14, thereby providing sufficient driving force to unfold the folding arm.

[0040] In order to automatically drive the sealing block to reset and seal the nozzle when the equipment is stored, and to provide a buffer when opening to avoid damage to the components from rigid collisions, a return spring 22 is preferably provided between the first sealing block 19 and the second sealing block 21. When the high-pressure water supply stops and the folding arm begins to retract, the elastic force of the return spring 22 will push the sealing block back into the sealing ring, automatically closing the nozzle and ensuring that the water flow channel is re-sealed in the non-working state. During the unfolding process, the return spring 22 also plays a buffering role, reducing the impact between the push rod and the sealing block, protecting the components from damage, and extending the service life.

[0041] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A side-folding arm type portable firefighting drone, characterized in that, include: A quadcopter explosion-proof drone (1) is fixedly connected to a take-off and landing bracket (2) at its bottom. A set of folding arms (3) is fixedly connected to each side of the take-off and landing bracket (2). The folding arms (3) include a first folding arm (301) and a second folding arm (302). Two or more sets of the first folding arms (301) and the second folding arms (302) are rotatably connected in sequence. The first folding arms (301) and the second folding arms (302) cross each other, and a central rotation shaft (303) is provided at the center intersection of the first folding arms (301) and the second folding arms (302). The first folding arm (301) and the second folding arm (302) are rotatably connected by a central rotating shaft (303); a water distribution pipe (11) is provided at the bottom of the lifting support (2), and a central telescopic pipe (13) is inserted into each end of the water distribution pipe (11). A piston (14) is connected to the end of the central telescopic pipe (13), and the piston (14) slides and seals with the inner wall of the water distribution pipe (11). A first positioning pin (304) is fixedly connected to the central rotating shaft (303), and the first positioning pin (304) is fixedly connected to the central telescopic pipe (13). One end is connected to two or more sets of movable fire extinguishing pipes (15) in sequence via a corrugated hose. A first telescopic pipe (16) and a second telescopic pipe (17) are inserted into both ends of the movable fire extinguishing pipe (15). A first nozzle (1601) and a second nozzle (1701) are respectively provided at the ends of the first telescopic pipe (16) and the second telescopic pipe (17). A second positioning pin (305) and a third positioning pin (306) are respectively fixedly connected to the ends of the first folding arm (301) and the second folding arm (302). The second positioning pin (305) is fixedly connected to the first telescopic pipe (16), and the third positioning pin (306) is fixedly connected to the first telescopic pipe (16). 06) Fixedly connected to the second telescopic pipe (17); the first telescopic pipe (16) is provided with a first sealing ring (18) on the inner side, the first sealing ring (18) is fixedly connected to the water distribution pipe (11), the first sealing ring (18) is tightly inserted with a first sealing block (19), and the end of the first telescopic pipe (16) is fixedly connected with a first top rod (1602); the second telescopic pipe (17) is provided with a second sealing ring (20) on the inner side, the second sealing ring (20) is tightly inserted with a second sealing block (21), and the end of the second telescopic pipe (17) is fixedly connected with a second top rod (1702).

2. The side-folding arm type portable firefighting drone according to claim 1, characterized in that, The folding arm (3) is provided in two layers, the two layers of the folding arm (3) are parallel to each other, and the two layers of the folding arm (3) are connected through the first positioning pin (304), the second positioning pin (305) and the third positioning pin (306) in sequence.

3. The side-folding arm type portable firefighting drone according to claim 1, characterized in that, The folding arm (3) is made of lightweight aluminum alloy.

4. The side-folding arm type portable firefighting drone according to claim 1, characterized in that, A set of connecting fixing blocks (4) are fixedly connected to each side of the lifting bracket (2). The connecting fixing blocks (4) are provided with fixing slots (401). A guide rod connecting block (5) is provided on one side of the connecting fixing block (4). A fixing insert (501) is integrally provided on the guide rod connecting block (5). The fixing insert (501) is inserted into the fixing slot (401) and fixed by bolts. A sliding guide rod (6) is passed through and fixedly connected to the guide rod connecting block (5). A first connecting block (7) and a second connecting block (8) are slidably connected to the sliding guide rod (6). The first connecting block (7) is rotatably connected to the first folding arm (301), and the second connecting block (8) is rotatably connected to the second folding arm (302).

5. The side-folding arm type portable firefighting drone according to claim 4, characterized in that, Two sliding guide rods (6) are provided, which are parallel to each other and arranged vertically to prevent the folding arm (3) from rotating vertically.

6. The side-folding arm type portable firefighting drone according to claim 1, characterized in that, The bottom of the lifting support (2) is fixedly connected to a fixed support (9) by bolts. The bottom of the fixed support (9) is fixedly connected to a pipe buckle (10). The pipe buckle (10) is engaged with a water distribution pipe (11).

7. The side-folding arm type portable firefighting drone according to claim 6, characterized in that, A quick-connect buckle (12) for connecting water pipes is provided at the center of the water distribution pipe (11).

8. The side-folding arm type portable firefighting drone according to claim 1, characterized in that, There are two or more sets of the movable fire extinguishing pipes (15), and the number of the movable fire extinguishing pipes (15) is the same as the number of the first folding arm (301) and the second folding arm (302), and adjacent movable fire extinguishing pipes (15) are connected by corrugated hoses.

9. The side-folding arm type portable firefighting drone according to claim 1, characterized in that, The first sealing block (19) and the second sealing block (21) are both conical, and a rubber sealing ring is provided between the first sealing block (19) and the second sealing block (21) and the first sealing ring (18) and the second sealing block (21).

10. The side-folding arm type portable firefighting drone according to claim 9, characterized in that, A reset spring (22) is provided between the first sealing block (19) and the second sealing block (21).

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