Networking type unmanned aerial vehicle for fire fighting

Abstract

The invention discloses a networking type fire-fighting unmanned aerial vehicle, and relates to the technical field of fire-fighting unmanned aerial vehicles, the networking type fire-fighting unmanned aerial vehicle comprises an unmanned aerial vehicle main frame, a front protection plate is fixedly mounted at the front end of the unmanned aerial vehicle main frame, a carbon dioxide storage tank is arranged on the unmanned aerial vehicle main frame, and a booster pump assembly is arranged at the lower end of the carbon dioxide storage tank; according to the unmanned aerial vehicle, in the fire extinguishing stage, along with upward movement of an undercarriage, a switch moving plate is moved out of a sliding groove of a balance weight magnet, an ejection spring ejects the balance weight magnet out, an electromagnet attracts the balance weight magnet to the position of the electromagnet, and the gravity center distribution of the unmanned aerial vehicle is changed through the operation; when the fire extinguishing agent conveying spray pipe sprays out carbon dioxide to generate recoil force, the new gravity center position can positively influence the attitude of the unmanned aerial vehicle, the new gravity center can counteract shaking caused by the recoil force to a certain degree, and the unmanned aerial vehicle can be kept stable in the fire extinguishing operation process just like a stabilizer.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting unmanned aerial vehicles, and in particular to a networked fire-fighting unmanned aerial vehicle. Background Art

[0002] In modern society, fire accidents occur frequently, especially special types of fires such as chemical fires, which have the characteristics of fierce fire, wide burning range, flammability and explosion, posing a huge threat to people's life and property safety. However, at the scene of chemical fires, there are many dangerous factors such as explosion, high temperature, and toxic gas leakage. It is difficult for firefighters to get close to the fire source to effectively extinguish the fire, which not only increases the risk of life for firefighters, but may also cause the fire to spread and cause greater losses. In addition, for fires in some high-rise buildings, remote mountainous areas or areas with complex terrain, traditional firefighting equipment is difficult to reach the scene quickly and cannot effectively control the fire in time, so drones are needed to extinguish fires; The current networked firefighting drones have been found to have at least the following technical problems: First, existing firefighting drones will generate a large recoil when spraying fire extinguishing agents, causing the drone's posture to change, affecting the spraying accuracy and coverage of the fire extinguishing agent. At the same time, existing firefighting drones lack an effective center of gravity adjustment mechanism and cannot maintain a stable flight posture during the fire-fighting process, reducing the fire-fighting efficiency.

[0003] Second, existing firefighting drones are easily affected by external factors such as airflow and crosswind during takeoff, flight and landing, resulting in unstable flight posture and difficulty in accurately reaching the designated fire-fighting location. Especially at the scene of a chemical fire, the shock waves and airflow changes generated by the explosion will further aggravate the flight instability of the drone and affect the fire-fighting effect. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a networked firefighting drone to solve the above problems.

[0005] A networked fire-fighting drone comprises a drone main frame, a front guard plate is fixedly installed at the front end of the drone main frame, a carbon dioxide storage tank is arranged on the drone main frame, a booster pump assembly is arranged at the lower end of the carbon dioxide storage tank, a fire extinguishing agent delivery nozzle is connected to the booster pump assembly through a pipeline, a landing gear is arranged at the lower end of the drone main frame, two adjusting screws are installed through threads on the landing gear, small motors are arranged on the two adjusting screws, a spring seat is arranged at the front end of the booster pump assembly, tooth grooves are arranged on both sides of the inner wall of the landing gear, and a ejection projectile is fixedly installed on the spring seat. A spring, a counterweight magnet is provided at the front end of the ejection spring, a limit strip is fixedly installed on the circumferential surface of the fire extinguishing agent delivery nozzle, an electromagnet is fixedly installed through the end of the fire extinguishing agent delivery nozzle, and two sets of protection mechanisms are provided at the lower end of the main frame of the UAV, the protection mechanism includes a guide protection plate, a fixed block is fixedly installed on the guide protection plate, and a first flat gear is fixedly installed at both front and rear ends of the fixed block, each of the first flat gears is meshed with a gear transmission belt, each of the inner walls of the gear transmission belt is meshed with a second flat gear, and each of the second flat gears is meshed with a tooth groove provided on the landing gear.

[0006] Preferably, a rotating rod is fixedly installed between every two of the second flat gears, and connecting rods are installed on the circumferential surfaces of the two rotating rods through bearings, and the two connecting rods are fixed on the bottom guard plate. Two reinforcement brackets are fixedly installed on the booster pump assembly, and the two reinforcement brackets are respectively connected to two adjusting screws through bearings.

[0007] Preferably, the two small motors are fixedly connected to the two adjusting screws through the output shafts respectively, the two small motors are fixedly mounted with motor brackets, the two motor brackets are fixedly connected to the main frame of the UAV, the spring seat is fixedly mounted on the connecting block, and the ejection spring and the counterweight magnet are both arranged through the circumferential surface of the fire extinguishing agent delivery nozzle.

[0008] Preferably, the counterweight magnet is slidably installed on the outer surface of the fire extinguishing agent delivery nozzle and the limit strip, a bottom guard plate is fixedly installed on the lower end of the connecting block, a slide groove is opened on the counterweight magnet, a switch shift plate is fixedly installed on the landing gear, and the switch shift plate is slidably installed in the slide groove opened by the counterweight magnet.

[0009] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, during the fire extinguishing stage, as the landing gear moves upward, the switch shifting plate moves out of the sliding slot of the counterweight magnet, the ejection spring ejects the counterweight magnet, and the electromagnet attracts the counterweight magnet to its position. This operation changes the center of gravity distribution of the UAV. When the fire extinguishing agent delivery nozzle sprays carbon dioxide to produce recoil, the new center of gravity position will have a positive effect on the posture of the UAV. The new center of gravity can offset the shaking caused by the recoil to a certain extent, just like a stabilizer, ensuring that the UAV remains stable during the fire extinguishing operation. This center of gravity adjustment mechanism makes the UAV more reliable when performing fire extinguishing operations, thereby improving the fire extinguishing efficiency and effect.

[0010] In the present invention, a deflector protection plate perpendicular to the main frame of the UAV is provided during the take-off stage so that it interacts with the airflow to generate wind resistance. This wind resistance can effectively suppress the shaking of the fuselage caused by the sudden increase in power during the initial acceleration process when the power of the UAV suddenly increases. The wind resistance will produce a reverse force on the fuselage, making the force on the fuselage in all directions more balanced, helping the UAV to better adjust its posture, thereby improving the stability and controllability of take-off and ensuring a smoother and more reliable take-off process.

[0011] In the present invention, during the flight, a small motor is used to drive the adjusting screw to rotate, so that the landing gear moves up, and the deflector protection plate is retracted to a position parallel to the main frame of the UAV through the gear transmission of the first flat gear, the gear transmission belt, and the second flat gear. In a complex and dangerous environment such as a chemical fire, the deflector protection plate can play an important protective role. It can resist the impact of the explosion, just like a solid shield, reducing the damage of the explosion fragments to the important parts of the UAV and ensuring the normal operation of the UAV. At the same time, the airflow can be guided and adjusted to effectively block the interference of the side wind on the flight of the UAV. The presence of the deflector protection plate allows the airflow to flow through the fuselage more smoothly, making it easier for the UAV to maintain a straight flight when flying downstream, greatly improving the stability and accuracy of the flight.

[0012] In the present invention, by using wireless operation to change the direction of the electromagnet current after use, the magnetic poles between the electromagnet and the counterweight magnet are changed to generate a repulsive force. Under the action of the repulsive force, the counterweight magnet will rebound to the original path and engage with the ejection spring. The center of gravity of the drone can be returned to the drone body as much as possible, making full preparations for subsequent recovery work. This design ensures the stability and safety of the drone during the recovery process, and avoids recovery difficulties or accidents due to center of gravity shift.

[0013] In the present invention, by controlling the two small motors to work again during the landing phase, the deflector protection plate returns to the initial vertical position, increasing its contact area with the airflow, thereby generating a larger wind resistance. This wind resistance plays a key role in deceleration and buffering, reducing the impact force at the moment of landing. The larger wind resistance can also provide the pilot with better operational feedback, helping the pilot to control the landing position more accurately, so that the UAV can land accurately at the predetermined location, improving the safety and accuracy of the landing, and ensuring the smooth completion of the UAV in the entire operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram before the present invention is used; Figure 2 This is a structural diagram after the present invention is used; Figure 3 It is a structural diagram of the carbon dioxide storage tank of the present invention; Figure 4 It is a structural diagram of the guide protection plate of the present invention; Figure 5 It is a structural diagram of the fire extinguishing agent delivery nozzle of the present invention; Figure 6 is a structural diagram of the landing gear of the present invention; Figure 7 For the present invention Figure 1 A magnified view of the structure at A; Figure 8 For the present invention Figure 1 Enlarged view of the structure at B.

[0015] In the figure, the correspondence between the component names and the figure numbers is: 11. Fire extinguishing agent delivery nozzle; 12. Limiting strip; 13. Electromagnet; 14. Counterweight magnet; 15. Connecting block; 16. Bottom guard plate; 17. Booster pump assembly; 18. Spring seat; 19. Ejection spring; 21. UAV main frame; 22. Motor bracket; 23. Small motor; 24. Adjusting screw; 25. Landing gear; 26. Carbon dioxide storage tank; 27. Front guard plate; 28. Switch shift plate; 29. ​​Reinforcement bracket; 31. Guide protection plate; 32. Fixed block; 33. First flat gear; 34. Connecting rod; 35. Rotating rod; 36. Second flat gear; 37. Gear transmission belt. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0017] See also Figure 1 - Figure 8The present invention provides a networked fire-fighting drone, including a drone main frame 21, a front guard plate 27 is fixedly installed at the front end of the drone main frame 21, a carbon dioxide storage tank 26 is provided on the drone main frame 21, a booster pump assembly 17 is provided at the lower end of the carbon dioxide storage tank 26, a fire extinguishing agent delivery nozzle 11 is connected to the booster pump assembly 17 through a pipeline, a landing gear 25 is provided at the lower end of the drone main frame 21, two adjusting screws 24 are installed through threads on the landing gear 25, and small motors 23 are provided on the two adjusting screws 24, a spring seat 18 is provided at the front end of the booster pump assembly 17, tooth grooves are provided on both sides of the inner wall of the landing gear 25, and a ejection spring 19 is fixedly installed on the spring seat 18, A counterweight magnet 14 is provided at the front end of the ejection spring 19, a limit strip 12 is fixedly installed on the circumferential surface of the fire extinguishing agent delivery nozzle 11, an electromagnet 13 is fixedly installed through the end of the fire extinguishing agent delivery nozzle 11, and two sets of protective mechanisms are provided at the lower end of the drone main frame 21, the protective mechanism includes a guide protection plate 31, a fixed block 32 is fixedly installed on the guide protection plate 31, and a first flat gear 33 is fixedly installed at both the front and rear ends of the fixed block 32, each first flat gear 33 is meshed with a gear transmission belt 37, and each gear transmission belt 37 The inner wall is meshed with a second flat gear 36, and each second flat gear 36 is meshed with a tooth groove provided on the landing gear 25. Before performing the fire fighting task, the equipment is in Figure 1 In the initial state shown, the two deflector protection plates 31 are perpendicular to the main frame 21 of the UAV, and the four landing cushion rubbers at the lower end of the landing gear 25 are in contact with the ground. When preparing, first fill the carbon dioxide storage tank 26 with liquid carbon dioxide for fire extinguishing. After starting the UAV, its propeller begins to rotate, and the entire device flies into the sky. Since the two deflector protection plates 31 are opposite to the airflow during takeoff, wind resistance will be generated. This wind resistance can effectively suppress the excessive shaking of the fuselage caused by the sudden increase in power during the initial acceleration of the UAV, and help the UAV to better adjust its posture, thereby improving the stability and controllability of takeoff, so that it can leave the ground more smoothly.

[0018] A rotating rod 35 is fixedly installed between every two second flat gears 36, and a connecting rod 34 is installed on the circumferential surface of the two rotating rods 35 through a bearing. The two connecting rods 34 are fixed on the bottom guard plate 16, and two reinforcing brackets 29 are fixedly installed on the booster pump assembly 17. The two reinforcing brackets 29 are respectively connected to two adjusting screws 24 through bearings. When the fire-fighting drone flies into the air and needs to extinguish the fire at the fire-fighting location, the user controls the two small motors 23 to work through remote operation, and the output shaft of the small motor 23 drives the adjusting screw 24 to rotate. Based on the threaded connection between the adjusting screw 24 and the landing gear 25, the landing gear 25 will continue to move upward. When the landing gear 25 moves, it The meshing second flat gear 36 rotates accordingly, and the meshing of the gear transmission belt 37 with the first flat gear 33 causes the first flat gear 33 to rotate, thereby folding the two deflector protection plates 31 upward until they are parallel to the UAV main frame 21. At this time, the deflector protection plates 31 can provide protection for the fire-fighting UAV in a chemical fire environment, resist the impact of the explosion, and reduce the damage to important components by the explosion fragments. At the same time, they are like deflectors, which can effectively prevent the influence of side winds on the flight of the UAV, making it easier for the UAV to maintain a straight line flight when flying downstream. In actual applications, the protection plates are installed on the side arms of the UAV, and ensure that they are closely fitted to the side of the fuselage to fully play the role of blocking side winds.

[0019] The two small motors 23 are fixedly connected to the two adjusting screws 24 through the output shafts respectively. The motor brackets 22 are fixedly installed on the two small motors 23. The two motor brackets 22 are fixedly connected to the main frame 21 of the drone. The spring seat 18 is fixedly installed on the connecting block 15. The ejection spring 19 and the counterweight magnet 14 are both arranged through the circumferential surface of the fire extinguishing agent delivery nozzle 11. When the landing gear 25 moves up, the switch shift plate 28 will also move upward and move out of the slide groove provided by the counterweight magnet 14. At this time, the elastic force of the ejection spring 19 plays a role, and the counterweight magnet 14 is ejected outward. Under the limit of the limit bar 12, the counterweight magnet 14 can only slide on the circumferential surface of the fire extinguishing agent delivery nozzle 11. When the counterweight magnet 14 approaches the electromagnet 13 (the electromagnet 13 is a device that can generate electromagnetics after being energized, mainly composed of an iron core and a conductive material wound around the outside of the iron core Winding composition, when current passes through the wire wound on the iron core, a magnetic field will be generated around the iron core, and the direction of the magnetic pole can be changed), due to the suction generated by the electromagnetic coil inside the electromagnet 13, the counterweight magnet 14 will be attracted and installed at the position of the electromagnet 13. At this time, the operator immediately operates the fire-fighting drone and starts the booster pump assembly 17. The booster pump assembly 17 begins to extract liquid carbon dioxide from the carbon dioxide storage tank 26 and sprays it from the port of the fire extinguishing agent delivery nozzle 11 to extinguish the fire with carbon dioxide. Since the counterweight magnet 14 is located at the electromagnet 13, the center of gravity of the drone as a whole will shift toward the direction of the electromagnet 13. In this way, when the fire extinguishing agent delivery nozzle 11 sprays carbon dioxide to generate recoil, the new center of gravity position will affect the posture of the drone, alleviate the shaking caused by the recoil to a certain extent, and ensure the stability of the drone during fire extinguishing operations.

[0020] The counterweight magnet 14 is slidably installed through the outer surface of the fire extinguishing agent delivery nozzle 11 and the limit strip 12, the bottom guard plate 16 is fixedly installed at the lower end of the connecting block 15, a slide groove is provided on the counterweight magnet 14, and a switch shift plate 28 is fixedly installed on the landing gear 25. The switch shift plate 28 is slidably installed in the slide groove provided by the counterweight magnet 14. When the firefighting drone is used, the current direction of the electromagnet 13 can be changed by wireless operation (using a wireless module such as Bluetooth, Wi-Fi, etc. to receive a signal from a control end such as a mobile phone or a remote control). After the current direction is changed, the magnetic poles between the electromagnet 13 and the counterweight magnet 14 change, and the electromagnet 13 generates a repulsive force on the counterweight magnet 14. Under the action of force, the counterweight magnet 14 will rebound to the original path. When the counterweight magnet 14 contacts the ejection spring 19, the two will be attracted together, so that the center of gravity of the drone returns to the drone body as much as possible, preparing for subsequent recovery. When the fire-fighting drone needs to be recovered, the two small motors 23 are controlled to work again, driving the two guide guard plates 31 back to the initial vertical position. During the landing of the drone, the guide guard plates 31 will increase the wind resistance, play a role of deceleration and buffering, reduce the landing speed of the drone, and reduce the impact force at the moment of landing, thereby protecting the fuselage and internal equipment. At the same time, the larger wind resistance also helps the pilot to control the landing position more accurately, improving the safety and accuracy of the landing.

[0021] The firefighting drone issues takeoff instructions through a networked remote control system. The system is based on 5G or other high-speed wireless communication networks to ensure that instructions can be transmitted to the drone in real time and accurately. In the fire command center, the operator can clearly see the various status parameters of the drone, such as power, altitude, speed, etc., through the large screen and professional control software. At the same time, the operator sends a takeoff command to the drone through the network to start the propeller and make the drone take off smoothly. During the entire flight and fire-fighting process, the drone is equipped with a variety of sensors, such as cameras, temperature sensors, gas sensors, etc. These sensors collect various data from the fire scene in real time, such as flame images, temperature distribution, toxic gas concentration, etc. Through the networking function, these data are transmitted back to the fire command center in a timely and accurate manner. The staff of the command center can make a comprehensive and accurate assessment of the fire situation based on these real-time data and formulate a more scientific and reasonable fire-fighting plan.

[0022] Working principle: The first step is to ensure that the equipment is in a Figure 1In the initial state shown, the two deflector protection plates 31 are perpendicular to the main frame 21 of the UAV, and the four landing cushion rubbers at the lower end of the landing gear 25 are in contact with the ground. When preparing, first fill the carbon dioxide storage tank 26 with liquid carbon dioxide for fire extinguishing. After starting the UAV, its propeller begins to rotate, and the entire device flies into the sky. Since the two deflector protection plates 31 are opposite to the airflow during takeoff, wind resistance will be generated. This wind resistance can effectively suppress the excessive shaking of the fuselage caused by the sudden increase in power during the initial acceleration of the UAV, and help the UAV to better adjust its posture, thereby improving the stability and controllability of takeoff, so that it can leave the ground more smoothly.

[0023] In the second step, when the firefighting UAV flies into the air and needs to perform firefighting operations at the fire-fighting location, the user controls the two small motors 23 to work through remote operation, and the output shaft of the small motor 23 drives the adjusting screw 24 to rotate. Based on the threaded connection between the adjusting screw 24 and the landing gear 25, the landing gear 25 will continue to move upward. When the landing gear 25 moves, the second flat gear 36 meshing therewith rotates accordingly, and the first flat gear 33 is meshed with the gear transmission belt 37, so that the first flat gear 33 rotates, and then the two deflector protective plates 31 are retracted upward until they are parallel to the main frame 21 of the UAV. At this time, the deflector protective plates 31 can provide protection for the firefighting UAV in a chemical fire environment, resist the impact of the explosion, and reduce the damage of the explosion fragments to important components. At the same time, they are like deflectors, which can effectively prevent the influence of side wind on the flight of the UAV, so that the UAV can more easily maintain a straight flight when flying downstream. In practical applications, the protective plates are installed on the side arms of the UAV, and it is ensured that they are closely fitted with the side of the fuselage to give full play to the role of blocking the side wind.

[0024] In the third step, when the landing gear 25 moves upward, the switch shift plate 28 will also move upward and move out of the slide slot opened by the counterweight magnet 14. At this time, the elastic force of the ejection spring 19 plays a role, and the counterweight magnet 14 is ejected outward. Under the limit of the limit bar 12, the counterweight magnet 14 can only slide on the circumferential surface of the fire extinguishing agent delivery nozzle 11. When the counterweight magnet 14 approaches the electromagnet 13 (the electromagnet 13 is a device that can generate electromagnetism after being energized, mainly composed of an iron core and a conductive winding wound around the outside of the iron core. When the current passes through the wire wound around the iron core, a magnetic field will be generated around the iron core, and the direction of the magnetic pole can be changed), the electromagnetic coil inside the electromagnet 13 generates suction , the counterweight magnet 14 will be attracted and installed at the position of the electromagnet 13. At this time, the operator immediately operates the fire-fighting drone and starts the booster pump assembly 17. The booster pump assembly 17 begins to extract liquid carbon dioxide from the carbon dioxide storage tank 26 and sprays it out from the port of the fire extinguishing agent delivery nozzle 11 to extinguish the fire with carbon dioxide. Since the counterweight magnet 14 is located at the electromagnet 13, the center of gravity of the drone as a whole will shift toward the electromagnet 13. In this way, when the fire extinguishing agent delivery nozzle 11 sprays carbon dioxide to generate recoil, the new center of gravity position will affect the posture of the drone, alleviate the shaking caused by the recoil to a certain extent, and ensure the stability of the drone during fire extinguishing operations.

[0025] The fourth step is that after the use of the firefighting drone is completed, the current direction of the electromagnet 13 can be changed through wireless operation (using wireless modules such as Bluetooth, Wi-Fi, etc. to receive signals from the control end, such as a mobile phone or a remote control). After the current direction is changed, the magnetic poles between the electromagnet 13 and the counterweight magnet 14 change, and the electromagnet 13 generates a repulsive force on the counterweight magnet 14. Under the action of the repulsive force, the counterweight magnet 14 will rebound to the original path. When the counterweight magnet 14 contacts the ejection spring 19, the two will be attracted together, so that the center of gravity of the drone returns to the drone body as much as possible, preparing for subsequent recovery.

[0026] In the fifth step, when the firefighting drone needs to be recovered, the two small motors 23 are controlled to work again to drive the two deflector protection plates 31 back to the initial vertical position. During the landing of the drone, the deflector protection plates 31 will increase the wind resistance, play a role of deceleration buffer, reduce the landing speed of the drone, and reduce the impact force at the moment of landing, thereby protecting the fuselage and internal equipment. At the same time, the larger wind resistance also helps the pilot to control the landing position more accurately, improving the safety and accuracy of the landing.

[0027] In the present invention, a deflector shield 31 is arranged perpendicular to the main frame 21 of the drone during the take-off phase, so that the deflector shield 31 interacts with the airflow to generate wind resistance. This wind resistance can effectively suppress the shaking of the fuselage caused by the sudden increase in power during the initial acceleration process when the power of the drone suddenly increases. The wind resistance will generate a reverse force on the fuselage, making the force on the fuselage in all directions more balanced, helping the drone to better adjust its attitude, thereby improving the stability and controllability of take-off, and ensuring that the take-off process is more stable and reliable. In the present invention, during the flight, the small motor 23 is used to drive the adjusting screw 24 to rotate, so that the landing gear 25 moves up, and the deflector shield 3 is driven by the first flat gear 33, the gear transmission belt 37, and the second flat gear 36. 1 is folded to a position parallel to the main frame 21 of the drone. In a complex and dangerous environment such as a chemical fire, the deflector shield 31 can play an important protective role. It can resist the impact of the explosion, just like a solid shield, reduce the damage of the explosion fragments to the important parts of the drone, and ensure the normal operation of the drone. At the same time, it can guide and adjust the airflow, effectively blocking the interference of the side wind on the flight of the drone. The existence of the deflector shield 31 allows the airflow to flow through the fuselage more smoothly, making it easier for the drone to maintain a straight flight when flying downstream, greatly improving the stability and accuracy of the flight. In the present invention, during the fire extinguishing stage, as the landing gear 25 moves up, the switch shifting plate 28 moves out of the slide slot of the counterweight magnet 14, and the ejection spring 19 moves the counterweight magnet 1 4 pops up, and the electromagnet 13 attracts the counterweight magnet 14 to its position. This operation changes the center of gravity distribution of the drone. When the fire extinguishing agent delivery nozzle 11 sprays carbon dioxide to generate recoil, the new center of gravity position will have a positive impact on the drone's posture. The new center of gravity can offset the shaking caused by the recoil to a certain extent, just like a stabilizer, ensuring that the drone remains stable during the fire extinguishing operation. This center of gravity adjustment mechanism makes the drone more reliable when performing fire extinguishing operations, and improves the fire extinguishing efficiency and effect. In the present invention, by using wireless operation to change the current direction of the electromagnet 13 after use, the magnetic poles between the electromagnet 13 and the counterweight magnet 14 are changed, generating a repulsive force. Under the action of the repulsive force, the counterweight magnet 14 will By rebounding to the original path and engaging with the ejection spring 19, the center of gravity of the drone can be returned to the drone body as much as possible, making full preparations for the subsequent recovery work. This design ensures the stability and safety of the drone during the recovery process, and avoids recovery difficulties or accidents caused by the center of gravity shift. In the present invention, by controlling the two small motors 23 to work again during the landing stage, the deflector protection plate 31 returns to the initial vertical position, so that the contact area with the airflow is increased, thereby generating a larger wind resistance. This wind resistance plays a key role in deceleration and buffering, reducing the impact force at the moment of landing. The larger wind resistance can also provide better operational feedback for the pilot, which helps the pilot to control the landing position more accurately, so that the drone can land accurately at the predetermined location.Improves the safety and accuracy of landing, ensuring the smooth completion of the entire operation process of the drone.

[0028] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A networked firefighting drone, comprising a drone main frame (21), characterized in that: A front guard plate (27) is fixedly mounted on the front end of the drone main frame (21); a carbon dioxide storage tank (26) is provided on the drone main frame (21); a booster pump assembly (17) is provided at the lower end of the carbon dioxide storage tank (26); and a fire extinguishing agent delivery nozzle (11) is connected to the booster pump assembly (17) via a pipeline; The lower end of the main frame (21) of the UAV is provided with a landing gear (25), two adjusting screws (24) are threadedly installed on the landing gear (25), and a small motor (23) is installed on each of the two adjusting screws (24). A spring seat (18) is provided at the front end of the booster pump assembly (17), and tooth grooves are provided on both sides of the inner wall of the landing gear (25). A ejection spring (19) is fixedly installed on the spring seat (18), and a counterweight magnet (14) is provided at the front end of the ejection spring (19). A limit strip (12) is fixedly installed on the circumferential surface of the fire extinguishing agent delivery nozzle (11), and an electromagnet (13) is fixedly installed on the end of the fire extinguishing agent delivery nozzle (11); The lower end of the UAV main frame (21) is provided with two sets of protection mechanisms, the protection mechanisms comprising a deflector protection plate (31), a fixing block (32) fixedly mounted on the deflector protection plate (31), first flat gears (33) fixedly mounted on both front and rear ends of the fixing block (32), each of the first flat gears (33) being meshed with a gear transmission belt (37), each of the inner walls of the gear transmission belt (37) being meshed with a second flat gear (36), and each of the second flat gears (36) being meshed with a tooth groove provided on the landing gear (25).

2. The networked firefighting drone according to claim 1, characterized in that: A rotating rod (35) is fixedly mounted between every two of the second flat gears (36).

3. The networked firefighting drone according to claim 2, characterized in that: The circumferential surfaces of the two rotating rods (35) are both penetrated by a connecting rod (34) through a bearing; Wherein, the two connecting rods (34) are both fixed on the bottom guard plate (16).

4. The networked firefighting drone according to claim 3, characterized in that: Two reinforcement brackets (29) are fixedly mounted on the booster pump assembly (17); The two reinforcement brackets (29) are respectively connected to two adjusting screws (24) via a bearing.

5. The networked firefighting drone according to claim 4, characterized in that: The two small motors (23) are respectively fixedly connected to the two adjusting screws (24) via output shafts.

6. The networked firefighting drone according to claim 5, characterized in that: A motor bracket (22) is fixedly mounted on each of the two small motors (23); Wherein, the two motor brackets (22) are both fixedly connected to the drone main frame (21).

7. The networked firefighting drone according to claim 6, characterized in that: The spring seat (18) is fixedly mounted on the connecting block (15); The ejection spring (19) and the counterweight magnet (14) are both arranged to penetrate the circumferential surface of the fire extinguishing agent delivery nozzle (11).

8. The networked firefighting drone according to claim 7, characterized in that: The counterweight magnet (14) is slidably mounted through the outer surfaces of the fire extinguishing agent delivery nozzle (11) and the limit strip (12); Wherein, a bottom guard plate (16) is fixedly mounted on the lower end of the connection block (15).

9. The networked firefighting drone according to claim 8, characterized in that: The counterweight magnet (14) is provided with a sliding groove.

10. The networked firefighting drone according to claim 9, characterized in that: A switch shift plate (28) is fixedly mounted on the landing gear (25); The switch moving plate (28) is slidably mounted in a sliding groove provided in the counterweight magnet (14).

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