Spraying adjusting type fire-fighting unmanned aerial vehicle

Abstract

The invention relates to the technical field of fire-fighting unmanned aerial vehicles, and discloses a jet adjusting type fire-fighting unmanned aerial vehicle which comprises an unmanned aerial vehicle body, a supporting frame is fixed to the lower portion of the unmanned aerial vehicle body, a fire-fighting water tank is installed on the supporting frame, and a variable frequency water pump is connected to a water outlet of the fire-fighting water tank; a sealing barrel is fixed to a water outlet of the variable frequency water pump, a water pipe is connected to one side of the sealing barrel, a water conveying rod is connected to one end of the water pipe, and a spray head is fixed to one end of the water conveying rod; a rotatable spraying hole plate is arranged at one end of the spraying head, a plurality of spraying holes distributed at equal intervals are formed in the spraying hole plate, the adjusting plate can automatically and horizontally move in the spraying head to plug part of the spraying holes in the spraying hole plate, and the purpose of automatically adjusting the spraying pressure and the spraying distance in the spraying head is achieved; and secondly, when the blocked spray orifice plate is washed, manual disassembly and cleaning are not needed, and the cleaning convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of firefighting drone technology, specifically a jet-adjustable firefighting drone. Background Technology

[0002] Drones are increasingly widely used in the firefighting industry, playing an irreplaceable role. In fire rescue, drones have the ability to respond quickly and monitor in real time. When a fire occurs, they can quickly reach the scene and use high-definition cameras and sensors to obtain real-time information about the fire, including the size of the fire, the direction of spread, and the location of trapped personnel. This provides crucial information to the command center and rescue teams, assisting in the formulation of scientific and reasonable rescue plans. Furthermore, they can carry water tanks containing extinguishing agents, and through the cooperation of variable frequency pumps and nozzles, spray the extinguishing agents onto the fire source for firefighting.

[0003] In existing technologies, the extinguishing agent nozzles of fire-fighting drones are connected to water pumps, and their spray volume is fixed and cannot be adjusted. This limits the nozzle's spray distance. When the fire source is large, the fire-fighting drone needs to maintain a safe distance, which can easily result in a large gap between it and the fire source, making it difficult for the sprayed extinguishing agent to cover the fire. In addition, during use, the nozzles are easily clogged by impurities, affecting the spraying effect and requiring manual disassembly and cleaning, which is time-consuming and labor-intensive. Summary of the Invention

[0004] This invention provides a spray-adjustable fire-fighting drone, which features an adjustable plate that automatically moves horizontally within the nozzle to block some of the spray holes on the nozzle plate. This allows for automatic adjustment of the spray pressure and distance within the nozzle. Furthermore, it eliminates the need for manual disassembly and cleaning when the nozzle plate is clogged. This addresses the problems mentioned in the background art, where the fire-fighting drone's extinguishing agent nozzle is connected to a water pump, resulting in a fixed and unadjustable spray volume. This limits the nozzle's spray distance, and when the fire source is large, the drone needs to maintain a safe distance, potentially creating a significant gap that makes it difficult for the sprayed extinguishing agent to cover the fire. Additionally, the nozzle is prone to clogging due to impurities, requiring manual disassembly and cleaning, which is time-consuming and labor-intensive.

[0005] The present invention provides the following technical solution: a jet-adjustable fire-fighting drone, comprising a drone body, a support frame fixed below the drone body, a fire water tank installed on the support frame, a variable frequency water pump connected to the outlet of the fire water tank, a sealing cylinder fixed to the outlet of the variable frequency water pump, a water pipe connected to one side of the sealing cylinder, a water delivery rod connected to one end of the water pipe, and a nozzle fixed to one end of the water delivery rod;

[0006] One end of the nozzle is provided with a rotatable spray plate, and the spray plate is provided with a number of equally spaced spray holes. Adjustment seats are fixed on both sides of the nozzle, and a movable adjustment plate is provided in the adjustment seat. An expansion sealing ring is fixed inside the nozzle.

[0007] As an optional embodiment of the jet-adjustable firefighting drone of the present invention, wherein: a piston plate is slidably connected inside the sealing cylinder, a hollow air delivery rod is fixed on the piston plate, a first spring is connected between the piston plate and the sealing cylinder, and a first abutment is fixed at one end of the hollow air delivery rod.

[0008] As an optional embodiment of the jet-adjustable fire-fighting drone of the present invention, wherein: an annular plate is slidably connected to the water delivery rod, a first abutment head is fixed above the annular plate, a second spring is connected between the annular plate and the water delivery rod, a first abutment rod is fixed on the annular plate, a mounting base is fixed on one side of the fire water tank, and the variable frequency water pump and the water delivery rod are both fixed on the mounting base.

[0009] As an optional embodiment of the jet-adjustable fire-fighting drone of the present invention, wherein: a first guide rod is fixed at one end of the adjusting plate, the first guide rod is elastically connected to the adjusting seat through a third spring, one end of the first guide rod abuts against a second abutting frame, a sliding bracket is fixed below the nozzle, the sliding bracket is slidably connected to the second abutting frame through a fourth spring, and one end of the first abutting rod abuts against the second abutting frame.

[0010] As an optional embodiment of the jet-adjustable fire-fighting drone of the present invention, wherein: a first rotating rod is fixed on the nozzle plate, a gear is fixed at the upper end of the first rotating rod, a Z-shaped rack is meshed on the gear, an electric push rod is fixed on the nozzle head, the piston rod of the electric push rod is elastically connected to the Z-shaped rack through a fifth spring, two second rotating rods are rotatably connected to the end of the nozzle, a torsion spring is connected between the second rotating rod and the nozzle, an arc-shaped scraper and an abutment block are respectively fixed on the second rotating rod, and an adjustment assembly for driving the abutment block to rotate is provided on the adjustment seat.

[0011] As an optional solution of the jet-adjustable firefighting drone of the present invention, the adjusting component includes a connecting rod, the connecting rod is fixed on the first guide rod, and one end of the connecting rod is fixed with an abutment strip.

[0012] As an optional embodiment of the jet-adjustable firefighting drone of the present invention, the adjusting component includes a third contact frame, which is elastically connected to the nozzle via a sixth spring, and a first contact wedge is fixed to the piston rod end of the electric push rod.

[0013] As an optional embodiment of the jet-adjustable firefighting drone of the present invention, the hollow air supply rod is provided with a flow hole, and a pressure relief valve is installed at the upper end of the hollow air supply rod. The hollow air supply rod is connected to the expansion sealing ring through a pipe.

[0014] As an optional embodiment of the jet-adjustable fire-fighting drone of the present invention, wherein: a filter seat is fixed inside the fire water tank, a filter plate is slidably connected to the filter seat, a second guide rod is fixed on one side of the filter seat, a scraper frame is provided on one side of the filter plate, the scraper frame is elastically connected to the second guide rod through a seventh spring, and the filter plate is elastically connected to the second guide rod through an eighth spring.

[0015] As an optional embodiment of the jet-adjustable fire-fighting drone of the present invention, wherein: a second contact head is fixed on the scraper frame, a second contact rod is abutted on the second contact head, the second contact rod is slidably connected to the fire water tank, and one end of the second contact rod abuts a third contact head, the third contact head being fixedly connected to the hollow air supply rod.

[0016] The present invention has the following beneficial effects:

[0017] 1. In this spray-adjustable fire-fighting drone, a variable frequency water pump delivers the extinguishing agent from the fire water tank to the sealed cylinder. The extinguishing agent in the sealed cylinder is then delivered to the water delivery rod through a water pipe, and finally sprayed through the nozzle. The nozzle orifice plate inside the nozzle ensures that the working pressure of each spray hole is consistent, avoiding sudden changes in water flow due to pressure fluctuations, and ensuring uniform spraying. The adjustment seats on both sides of the nozzle facilitate the movement of the adjustment plate, which can partially block several spray holes. This automatically increases the water flow in the unblocked spray holes, resulting in a local pressure increase. This allows the fire-fighting drone to spray extinguishing agent from a distance for fire extinguishing, improving the safety of the fire-fighting drone.

[0018] The variable frequency water pump can adjust the water delivery volume according to the distance between the fire-fighting drone and the fire source. Under the action of water pressure, the piston plate in the sealed cylinder drives the hollow air delivery rod to move vertically. Through the cooperation of the first contact frame and the first contact head, the annular plate drives the first contact rod to move horizontally on the water delivery rod and automatically contacts the second contact frame. This causes the adjusting plate to move horizontally inside the nozzle to block some of the spray holes on the nozzle plate, thus achieving the purpose of automatically adjusting the spray pressure and spray distance inside the nozzle.

[0019] 2. In this adjustable spray firefighting drone, the rotation angle of the nozzle plate can be adjusted during cleaning through the cooperation of an electric push rod, a Z-shaped rack, a first rotating rod, and gears. This allows the clogging surface of the nozzle plate to face the outside of the nozzle head, facilitating the removal of impurities from the nozzle head during rinsing and improving the spraying effect of the nozzle plate. The rotation angle of the arc-shaped scraper on the nozzle head can be adjusted by the adjustment component. During the rinsing process of the nozzle plate, the arc-shaped scraper can thoroughly scrape away impurities, improving the cleaning effect of the nozzle plate. The variable frequency water pump can periodically adjust the water pressure and frequency during the rinsing of the nozzle plate, forming a pulse water flow that can effectively remove blockages in the spray holes, improving the rinsing effect of the nozzle plate. No manual disassembly and cleaning is required, greatly improving the convenience of cleaning the nozzle plate.

[0020] When the piston plate moves inside the sealed cylinder, it compresses the internal air. The compressed air is then delivered to the expansion sealing ring through the flow hole, hollow air delivery rod, and pipe. This causes the expansion sealing ring to expand automatically, thus automatically sealing the gap between the nozzle plate and the nozzle. On the one hand, this prevents the leakage of extinguishing agent during firefighting, which would be wasteful. On the other hand, it ensures the water pressure inside the nozzle and improves the spraying effect. After the expansion sealing ring is de-expanded, it can prevent any obstruction to the rotation of the nozzle plate.

[0021] 3. In this spray-adjustable fire-fighting drone, the extinguishing agent sucked in by the variable frequency water pump can be filtered through the filter plate installed on the filter base to prevent impurities from clogging the nozzle. The scraper frame can scrape off the impurities attached to the filter plate, improving the flow efficiency of the extinguishing agent. When the hollow air delivery rod moves vertically, the cooperation of the third contact head, the second contact head, and the second contact rod drives the scraper frame to automatically remove the impurities attached to the filter plate. When the power of the variable frequency water pump reaches its maximum, the extinguishing agent sprayed by the nozzle has the longest range, and at the same time, the water intake of the variable frequency water pump reaches its maximum, which can realize the purpose of the scraper frame automatically driving the filter plate to slide on the filter base, thereby increasing the flow of extinguishing agent and improving the fire extinguishing effect. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the sealing cylinder structure of the present invention.

[0024] Figure 3 This is a cross-sectional view of the sealing cylinder structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the internal structure of the fire water tank of the present invention.

[0026] Figure 5 This is one of the schematic diagrams of the nozzle structure of the present invention.

[0027] Figure 6 This is the second schematic diagram of the nozzle structure of the present invention.

[0028] Figure 7 This is the third schematic diagram of the nozzle structure of the present invention.

[0029] Figure 8 This is a cross-sectional view of the mounting base structure of the present invention.

[0030] Figure 9 This is a cross-sectional view of the structural expansion sealing ring of the present invention.

[0031] Figure 10 for Figure 4 Enlarged view of point A in the middle.

[0032] Figure 11 for Figure 6 Enlarged view of section B in the middle.

[0033] In the diagram: 1. UAV body; 2. Support frame; 3. Fire water tank; 4. Variable frequency water pump; 5. Sealing cylinder; 6. Water pipe; 7. Water delivery rod; 8. Nozzle; 9. Spray plate; 91. Spray hole; 10. Adjusting seat; 11. Adjusting plate; 12. Expansion sealing ring; 13. Piston plate; 14. Water filter seat; 15. Hollow air delivery rod; 16. First spring; 17. Flow hole; 18. First contact frame; 19. Mounting base; 20. Annular plate; 21. First contact head; 22. Second spring; 23. First contact rod; 24. First guide rod; 25. Third spring; 26. Second contact head. 27. Frame; 28. Sliding bracket; 29. ​​Fourth spring; 30. First rotating rod; 31. Gear; 32. Z-shaped rack; 33. Electric push rod; 34. Fifth spring; 35. Pressure relief valve; 36. Second rotating rod; 37. Torsion spring; 38. Arc-shaped scraper; 49. Third contact head; 40. Contact block; 41. Connecting rod; 42. Contact strip; 43. Third contact frame; 44. Sixth spring; 45. First contact wedge; 46. Filter plate; 47. Scraper frame; 48. Seventh spring; 49. Eighth spring; 50. Second contact head; 51. Second contact rod; 52. Second guide rod. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1, please refer to Figures 1 to 11A jet-adjustable fire-fighting drone includes a drone body 1, a support frame 2 fixed below the drone body 1, a fire water tank 3 installed on the support frame 2, a variable frequency water pump 4 connected to the outlet of the fire water tank 3, a sealing cylinder 5 fixed to the outlet of the variable frequency water pump 4, a water pipe 6 connected to one side of the sealing cylinder 5, a water delivery rod 7 connected to one end of the water pipe 6, and a nozzle 8 fixed to one end of the water delivery rod 7.

[0036] One end of the nozzle 8 is provided with a rotatable spray plate 9, and the spray plate 9 is provided with a number of equally spaced spray holes 91. Adjustment seats 10 are fixed on both sides of the nozzle 8. A movable adjustment plate 11 is provided inside the adjustment seat 10. An expansion sealing ring 12 is fixed inside the nozzle 8.

[0037] A piston plate 13 is slidably connected inside the sealing cylinder 5. A hollow air delivery rod 15 is fixed on the piston plate 13. A first spring 16 is connected between the piston plate 13 and the sealing cylinder 5. A first abutment 18 is fixed to one end of the hollow air delivery rod 15.

[0038] A ring plate 20 is slidably connected to the water supply rod 7. A first contact head 21 is fixed above the ring plate 20. A second spring 22 is connected between the ring plate 20 and the water supply rod 7. A first contact rod 23 is fixed on the ring plate 20. A mounting base 19 is fixed on one side of the fire water tank 3. The variable frequency water pump 4 and the water supply rod 7 are both fixed on the mounting base 19.

[0039] One end of the adjusting plate 11 is fixed with a first guide rod 24. The first guide rod 24 is elastically connected to the adjusting seat 10 through a third spring 25. One end of the first guide rod 24 abuts against a second abutting frame 26. A sliding bracket 27 is fixed below the nozzle 8. The sliding bracket 27 is slidably connected to the second abutting frame 26 through a fourth spring 28. One end of the first abutting rod 23 abuts against the second abutting frame 26.

[0040] The hollow air delivery rod 15 has a flow hole 17 and a pressure relief valve 34 is installed at the upper end of the hollow air delivery rod 15. The hollow air delivery rod 15 is connected to the expansion sealing ring 12 through a pipe.

[0041] refer to Figures 1 to 9When a fire-fighting drone performs high-altitude fire suppression, the main body 1 of the drone moves the fire water tank 3 on the support frame 2 closer to the fire source. The variable frequency water pump 4 delivers the extinguishing agent from the fire water tank 3 to the sealed cylinder 5, causing the piston plate 13 in the sealed cylinder 5 to move the hollow air delivery rod 15 upward. The first spring 16 stores power, and the extinguishing agent flows into the water delivery rod 7 through the water pipe 6 and is sprayed towards the fire source through the nozzle plate 9 in the nozzle 8 for fire suppression. When the piston plate 13 moves the hollow air delivery rod 15 upward, it can compress the air in the sealed cylinder 5. The compressed air flows into the hollow air delivery rod 15 through the flow hole 17 and is then delivered to the expansion sealing ring 12 in the nozzle 8 through the pipeline, which can seal the gap between the nozzle plate 9 and the nozzle 8.

[0042] When the fire source is large, the firefighting drone needs to maintain a considerable distance from the fire source to ensure its own safety. At this time, the variable frequency water pump 4 increases its power and water output, which increases the movement distance of the piston plate 13 driving the hollow air delivery rod 15. At the same time, with the cooperation of the pressure relief valve 34, when the pressure of the expansion sealing ring 12 reaches the set threshold, the excess gas is released, which reduces the pressure of the expansion sealing ring 12 to a safe range. The hollow air delivery rod 15 drives the first contact frame 18 to move upward and contact the first contact head 21, so that the annular plate 20 slides on the water delivery rod 7. The second spring 22 stores force, causing the first contact rod 23 fixed at one end of the annular plate 20 to contact the second contact head 21. The contact frame 26 abuts, causing the second contact frame 26 to move on the sliding bracket 27 fixed below the nozzle 8. The fourth spring 28 stores power, and the two ends of the second contact frame 26 abut against the two first guide rods 24, causing the first guide rods 24 to drive the adjusting plate 11 to slide within the adjusting seat 10. The third spring 25 stores power, which can realize the purpose of the adjusting plate 11 to automatically block some of the spray holes 91, causing the water flow of the unblocked spray holes 91 to automatically increase and the local pressure to rise, thereby increasing the spray distance of the extinguishing agent. This makes it convenient for fire-fighting drones to extinguish fires at distant sources from a safe location, and can improve the safety of fire-fighting drone use.

[0043] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 11 A first rotating rod 29 is fixed on the nozzle plate 9. A gear 30 is fixed at the upper end of the first rotating rod 29. A Z-shaped rack 31 is meshed on the gear 30. An electric push rod 32 is fixed on the nozzle 8. The piston rod of the electric push rod 32 is elastically connected to the Z-shaped rack 31 through a fifth spring 33. Two second rotating rods 35 are rotatably connected to the end of the nozzle 8. A torsion spring 36 is connected between the second rotating rods 35 and the nozzle 8. An arc-shaped scraper 37 and a contact block 39 are fixed on the second rotating rods 35 respectively. An adjustment assembly for driving the contact block 39 to rotate is provided on the adjustment seat 10.

[0044] The adjustment assembly includes a connecting rod 40, which is fixed to the first guide rod 24, and an abutment strip 41 is fixed to one end of the connecting rod 40.

[0045] refer to Figures 3 to 11 When fire extinguishing agents are transported or stored for a long time, they are easily contaminated by the environment and impurities can easily mix in, causing blockage of the nozzle plate 9 of the nozzle 8 and affecting the spraying effect. Therefore, it is necessary to clean the nozzle plate 9 in a timely manner. During cleaning, the piston rod of the electric push rod 32 drives the Z-shaped rack 31 to move horizontally, drives the gear 30 to rotate, and then drives the nozzle plate 9 to rotate through the first rotating rod 29. At this time, the expansion sealing ring 12 is in the retracted state, and the nozzle plate 9 rotates inside the nozzle 8 so that the blocked side faces the outside of the nozzle 8. The fire extinguishing agent in the fire water tank 3 is delivered to the nozzle 8 by the variable frequency water pump 4, which can achieve the purpose of flushing the nozzle plate 9. During the flushing process, it is easy to discharge impurities from the nozzle 8 and improve the spraying effect of the nozzle plate 9 when it is working. At the same time, the variable frequency water pump 4 can periodically adjust the water flow pressure and frequency during the flushing of the nozzle plate 9 to form a pulse water flow, which can effectively remove the blockage in the spray hole 91 and improve the flushing effect of the nozzle plate 9. There is no need for manual disassembly and cleaning, and it is not limited by conditions, which greatly improves the convenience of cleaning the nozzle plate 9.

[0046] The pressure inside the sealing cylinder 5 changes periodically. When the pressure is high, the hollow air delivery rod 15 moves a large distance, which enables the annular plate 20 to drive the first contact rod 23 to reciprocate on the water delivery rod 7, causing the second contact frame 26 to contact the first guide rod 24. On the one hand, the flushing pressure can be adjusted to improve the removal effect of blockages. On the other hand, the first guide rod 24 can drive the connecting rod 40 to move horizontally, causing the contact strip 41 to contact the contact block 39, so that the second rotating rod 35 rotates on the nozzle 8. The torsion spring 36 stores force, which can make the arc scraper 37 deflect continuously, thereby scraping away impurities on the surface of the nozzle plate 9 and improving the cleaning effect of the nozzle plate 9. The two arc scrapers 37 are staggered to avoid collision during operation and affect the scraping effect.

[0047] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 11 This application also provides an adjustment component technical solution, the adjustment component includes a third contact frame 42, the third contact frame 42 is elastically connected to the nozzle 8 through a sixth spring 43, and a first contact wedge 44 is fixed to the piston rod end of the electric push rod 32.

[0048] refer to Figures 5 to 11The piston rod of the electric push rod 32 drives the Z-shaped rack 31 to move, causing the nozzle plate 9 to rotate. When the nozzle plate 9 is rotated to the position, the Z-shaped rack 31 abuts against the gear 30. When the piston rod of the electric push rod 32 continues to move, the fifth spring 33 stores force, which can realize the purpose of the first contact wedge 44 abutting against the third contact frame 42, so that the third contact frame 42 slides on the nozzle 8. The sixth spring 43 stores force, and the third contact frame 42 abuts against the contact block 39, thereby causing the second rotating rod 35 to drive the arc-shaped scraper 37 to deflect and scrape off the impurities on the surface of the nozzle plate 9.

[0049] Example 4 is an improvement on Example 1. Specifically, a filter seat 14 is fixed inside the fire water tank 3, a filter plate 45 is slidably connected to the filter seat 14, and a second guide rod 51 is fixed on one side of the filter seat 14. A scraper frame 46 is provided on one side of the filter plate 45. The scraper frame 46 is elastically connected to the second guide rod 51 through a seventh spring 47, and the filter plate 45 is elastically connected to the second guide rod 51 through an eighth spring 48.

[0050] A second contact head 49 is fixed on the scraper frame 46. A second contact rod 50 is abutted on the second contact head 49. The second contact rod 50 is slidably connected to the fire water tank 3, and one end of the second contact rod 50 abuts a third contact head 38. The third contact head 38 is fixedly connected to the hollow air supply rod 15.

[0051] refer to Figure 3 When the fire-fighting drone is extinguishing a fire, the hollow air supply rod 15 moves upward, which can drive the third contact head 38 to move synchronously, so that the third contact head 38 contacts the second contact rod 50, causing the second contact rod 50 to slide on the fire water tank 3 and contact the second contact head 49, which facilitates the sliding of the scraper frame 46 on the second guide rod 51. The seventh spring 47 stores power, which can achieve the purpose of scraping off the impurities attached to the surface of the filter plate 45, and can improve the flow effect of the extinguishing agent. When the power of the variable frequency water pump 4 reaches the maximum, the extinguishing agent sprayed by the nozzle 8 has the longest range. At the same time, the water intake of the variable frequency water pump 4 reaches the maximum. When the moving distance of the hollow air supply rod 15 is the maximum, the scraper frame 46 can push the filter plate 45 to move vertically on the filter seat 14. The eighth spring 48 stores power, thereby increasing the flow of the extinguishing agent and improving the extinguishing effect.

[0052] When the nozzle plate 9 flushes away the blockage impurities, the variable frequency water pump 4 periodically adjusts the water flow pressure and frequency, and the hollow air delivery rod 15 drives the third contact head 38 to reciprocate synchronously. This enables the scraper frame 46 to reciprocate and scrape the impurities on the filter plate 45. The bottom of the fire water tank 3 is equipped with a drain outlet and a valve. After the fire is extinguished, the valve can be manually opened to allow the impurities, along with the remaining extinguishing agent at the bottom of the fire water tank 3, to be discharged from the drain outlet.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A jet-adjustable firefighting drone, comprising a drone body (1), characterized in that: A support frame (2) is fixed below the main body (1) of the drone. A fire water tank (3) is installed on the support frame (2). A variable frequency water pump (4) is connected to the outlet of the fire water tank (3). A sealing cylinder (5) is fixed to the outlet of the variable frequency water pump (4). A water pipe (6) is connected to one side of the sealing cylinder (5). A water delivery rod (7) is connected to one end of the water pipe (6). A nozzle (8) is fixed to one end of the water delivery rod (7). One end of the nozzle (8) is provided with a rotatable spray plate (9), and the spray plate (9) is provided with a number of equally spaced spray holes (91). Adjustment seats (10) are fixed on both sides of the nozzle (8). A movable adjustment plate (11) is provided inside the adjustment seat (10). An expansion sealing ring (12) is fixed inside the nozzle (8).

2. The jet-adjustable firefighting drone according to claim 1, characterized in that: A piston plate (13) is slidably connected inside the sealing cylinder (5). A hollow air delivery rod (15) is fixed on the piston plate (13). A first spring (16) is connected between the piston plate (13) and the sealing cylinder (5). A first abutment frame (18) is fixed at one end of the hollow air delivery rod (15).

3. The jet-adjustable firefighting drone according to claim 1, characterized in that: An annular plate (20) is slidably connected to the water delivery rod (7). A first contact head (21) is fixed above the annular plate (20). A second spring (22) is connected between the annular plate (20) and the water delivery rod (7). A first contact rod (23) is fixed on the annular plate (20). A mounting base (19) is fixed on one side of the fire water tank (3). The variable frequency water pump (4) and the water delivery rod (7) are both fixed on the mounting base (19).

4. The jet-adjustable firefighting drone according to claim 3, characterized in that: One end of the adjusting plate (11) is fixed with a first guide rod (24), the first guide rod (24) is elastically connected to the adjusting seat (10) through a third spring (25), one end of the first guide rod (24) abuts against a second abutting frame (26), a sliding bracket (27) is fixed below the nozzle (8), the sliding bracket (27) is slidably connected to the second abutting frame (26) through a fourth spring (28), and one end of the first abutting rod (23) abuts against the second abutting frame (26).

5. The jet-adjustable firefighting drone according to claim 4, characterized in that: A first rotating rod (29) is fixed on the nozzle plate (9). A gear (30) is fixed at the upper end of the first rotating rod (29). A Z-shaped rack (31) is meshed on the gear (30). An electric push rod (32) is fixed on the nozzle (8). The piston rod of the electric push rod (32) is elastically connected to the Z-shaped rack (31) through a fifth spring (33). Two second rotating rods (35) are rotatably connected to the end of the nozzle (8). A torsion spring (36) is connected between the second rotating rod (35) and the nozzle (8). An arc-shaped scraper (37) and an abutment block (39) are fixed on the second rotating rod (35). An adjustment assembly for driving the abutment block (39) to rotate is provided on the adjustment seat (10).

6. The jet-adjustable firefighting drone according to claim 5, characterized in that: The adjustment assembly includes a connecting rod (40), which is fixed to the first guide rod (24), and one end of the connecting rod (40) is fixed with an abutment strip (41).

7. The jet-adjustable firefighting drone according to claim 5, characterized in that: The adjustment assembly includes a third abutment (42), which is elastically connected to the nozzle (8) via a sixth spring (43), and a first abutment wedge (44) is fixed to the piston rod end of the electric push rod (32).

8. The jet-adjustable firefighting drone according to claim 2, characterized in that: The hollow air delivery rod (15) has a flow hole (17) and a pressure relief valve (34) is installed at the upper end of the hollow air delivery rod (15). The hollow air delivery rod (15) is connected to the expansion sealing ring (12) through a pipe.

9. The jet-adjustable firefighting drone according to claim 2, characterized in that: The fire water tank (3) is fixed with a filter seat (14), and a filter plate (45) is slidably connected on the filter seat (14). A second guide rod (51) is fixed on one side of the filter seat (14), and a scraper frame (46) is provided on one side of the filter plate (45). The scraper frame (46) is elastically connected to the second guide rod (51) through a seventh spring (47), and the filter plate (45) is elastically connected to the second guide rod (51) through an eighth spring (48).

10. The jet-adjustable firefighting drone according to claim 9, characterized in that: The scraper frame (46) is fixed with a second contact head (49), and the second contact head (49) abuts against a second contact rod (50). The second contact rod (50) is slidably connected to the fire water tank (3), and one end of the second contact rod (50) abuts against a third contact head (38). The third contact head (38) is fixedly connected to the hollow air supply rod (15).

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