Fire-fighting and fire-extinguishing watering device hung on unmanned aerial vehicle

Abstract

The lower ends of a plurality of steel wire ropes are jointly connected with the upper end of a water bag, a water bag is integrally arranged at the bottom end of the interior of the water bag and is of a circular truncated cone structure, a round opening is formed in the center of the water bag, a sealing part is arranged on the inner wall of the round opening, and a water outlet is formed in the lower end of the water bag. A sealing part is connected to the sealing part, a tensioning rope is connected to the sealing part, a sealing part used for blocking the upper portion of the water bag is arranged above the water bag, and an opening mechanism used for opening the sealing part and a limiting structure used for limiting opening of the sealing part are further installed in the upper cover. The sealing plate can open or close the opening above the water bag according to needs, when water is taken out and the water bag moves, spilling of water in the water bag due to shaking can be reduced as much as possible, when the water bag is empty, it can be avoided that airflow enters the water bag, and consequently the overall resistance is increased, the resistance in the flight process of the unmanned aerial vehicle is reduced, and the unmanned aerial vehicle is protected. And the cruising ability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting drones, and in particular to a fire-fighting and sprinkling device suspended on a drone. Background Art

[0002] Fire-fighting drones are used in a variety of complex environments, especially in mountainous areas with difficult terrain and inconvenient transportation. In these areas, traditional fire trucks are difficult to reach quickly, while drones can quickly fly over obstacles and reach the fire scene. In mountain forest fires, drones can carry water bags to nearby rivers or water sources, collect water resources and quickly transport them to the fire area to accurately strike the fire source and effectively control the spread of the fire. The water bags currently used usually consist of a framework and a water bag covering the outside of the framework. They are in a hemispherical structure, and an electric control valve is installed at the bottom of the water bag.

[0003] The water bag is suspended under the drone by a rope. When taking water, the drone descends so that part of the water bag sinks underwater. Then the drone flies forward to tilt the water bag, and water will flow into the water bag. After taking water, the drone carries the water bag to move above the required fire-fighting area, and the electric control valve is opened to discharge water for fire-fighting. When the drone encounters strong winds during flight, the water bag below it will shake. And when the drone is extinguishing fires in areas with complex terrains such as forests, it is difficult to ensure that the water bag will not collide with nearby trees or other objects, resulting in the shaking of the water bag, which may cause loss of internal water; and when the water in the water bag is discharged, the overall weight of the entire water bag will be reduced. During the flight of the drone, the water bag will tilt. At this time, the water bag is similar to a parachute structure, and air will enter the water bag and bulge, which will increase the resistance when the drone flies and reduce the endurance during the return journey. For this reason, a fire-fighting and sprinkling device suspended on a drone is designed. Summary of the Invention

[0004] A fire-fighting and sprinkling device suspended on a drone proposed by the present invention solves the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A fire-fighting and sprinkling device suspended on a drone includes a suspension frame. A plurality of hooks distributed in a circular array are arranged on the lower surface of the suspension frame. A steel wire rope is connected below the hook. The lower ends of the plurality of steel wire ropes are commonly connected to the upper end of a water bladder. A water bag is integrally arranged at the bottom end inside the water bladder. The water bag is in a frustum structure, and a circular opening is provided at the center of the water bag. A sealing part is arranged on the inner wall of the circular opening. A sealing member is connected to the sealing part. A tensioning rope is connected to the sealing member. A sealing member for sealing the upper part of the water bladder is arranged above the water bladder; Above the suspension bracket, an upper cover is fixed, and a lower circular plate is fixed below the suspension bracket. Inside the upper cover, a spring wire winder is installed. A winding rope is connected to the coil spring of the spring wire winder, and the lower end of the winding rope is connected to a lifting rod. A limiting ring is arranged on the outer circle of the lifting rod. The upper end of the tension rope is connected to the lifting rod. Inside the upper cover, an opening mechanism for opening the seal and a limiting structure for restricting the opening of the sealing member are also installed.

[0006] Preferably, a through-opening is formed on the lower circular plate. A plurality of linearly distributed sliding openings are arranged around the through-opening in a circular array, and all the plurality of linearly distributed sliding openings communicate with the through-opening. The size of the through-opening is larger than that of the limiting ring, and the limiting ring can be placed below the lower circular plate through the through-opening, so as to facilitate the downward pulling out of the winding rope.

[0007] Preferably, a ring frame is fixed above the water bag. The ring frame includes a lower ring placed on the inner wall above the water bag. A cross is fixed inside the inner circle of the lower ring. A pressing ring is bolted above the lower ring. A plurality of hanging ears are arranged on the pressing ring in a circular array. The lower ends of a plurality of steel wire ropes are connected to the hanging ears. The upper end of the water bag is bent inward and lapped above the lower ring, and then the pressing ring is pressed above the bent part of the water bag, and the lower ring and the pressing ring are fixed by bolts and nuts. A lower cylinder is fixed below the water bag. A plurality of uniformly distributed water outlet openings are formed on the outer surface and the bottom surface of the lower cylinder. The bent part of the upper end of the water bag is lapped above the lower cylinder, and then an annular flange is inserted into the inner bottom end of the water bag and tightly pressed together with the lower cylinder. Finally, bolts, nuts and gaskets are used for fixing.

[0008] Preferably, the inside of the sealing part is designed to be hollow to form an annular cavity. A plurality of connecting notches are formed on the outer surface of the sealing part in a circular array, and the connecting notches communicate with the annular cavity. The sealing member includes a pulling sealing rope inserted into the annular cavity. A plurality of sealing ropes are connected to the outer circle of the pulling sealing rope in a circular array. The other ends of the plurality of sealing ropes pass through the connecting notches and are connected to the tension rope. When the tension rope is pulled upward, the plurality of sealing ropes below can be pulled upward together, so that the pulling sealing rope located in the annular cavity is tightened, and the size of the circular opening formed by the sealing part is reduced to form a sealing structure.

[0009] Preferably, the lower end of the extrusion cylinder passes through the circular opening and is fixed to the inner bottom end of the lower cylinder, and the lower end of the extrusion cylinder is connected to the inner bottom end of the lower cylinder. When the sealing part is tightened under the action of the plurality of sealing ropes, the size of the circular opening on the sealing part is reduced and tightly pressed against the outer surface of the extrusion cylinder, so as to form a sealing structure, preventing the water in the water bag from leaking.

[0010] Preferably, the seal includes a plurality of fan-shaped sealing plates. Two sets of symmetrically distributed deflection frames are welded to the inner ends of the sealing plates. An installation axle pin is rotatably installed between the two deflection frames. An installation axle seat is fixed on the installation axle pin, and the installation axle seat is fixed on the upper surface of the cross. A torsion spring is sleeved on the installation axle pin, and the two ends of the torsion spring are respectively connected to the installation axle seat and the deflection frame. The torsion spring makes the sealing plate always tend to deflect downward, so that the sealing plate can fit on the cross; The size of the sealing plate is larger than the size of the fan-shaped opening on the cross, so that the edge of the sealing plate can fit above the cross.

[0011] Preferably, the opening mechanism includes two sets of electric push rods symmetrically fixed inside the upper cover. A lifting ring seat is connected to the push rod of the electric push rod. A circular opening is formed at the center of the lifting ring seat. The lower end of the lifting rod passes downward through the circular opening and is placed below the lifting ring seat. A plurality of opening ropes distributed in an annular array are connected below the lifting ring seat. The lower ends of the opening ropes are connected to the sealing plate. When the push rod of the electric push rod rises, it will drive the lifting ring seat to move upward together. The rising lifting ring seat will make the sealing plate deflect around the installation axle pin through the opening rope, and the outer end of the sealing plate will tilt up, so that the opening above the water bag is opened and the water bag can be replenished with water; A plurality of extrusion rollers distributed in an annular array are rotatably installed above the lifting ring seat through a shaft frame and a shaft pin.

[0012] Preferably, the limiting structure includes a plurality of limiting blocks. A strip-shaped opening is formed through the upper and lower parts of the limiting block. A T-shaped block is slidably inserted into the strip-shaped opening. The bottom end of the T-shaped block is fixed on the lower circular plate. A return spring is arranged in the strip-shaped opening. The two ends of the return spring are respectively abutted against the T-shaped block and the inner wall of the strip-shaped opening. The size of the strip-shaped opening is smaller than the size of the linear sliding opening. The T-shaped block can be directly fixed on the lower circular plate. The return spring makes the limiting block always tend to move outward.

[0013] Preferably, a moving block is arranged below the inner side of the limiting block. The moving block passes through the linear sliding opening and is placed below the lower circular plate. A contact inclined surface is formed by shaving off a part of the outer side of the moving block. The contact inclined surface is in rolling contact with the extrusion roller; When the limiting block is at the outermost end, the outer side of the contact inclined surface is still inside the inner end of the extrusion roller. When the lifting ring seat moves down a certain distance, at this time the extrusion roller is still in contact with the contact inclined surface, and a part of the inner end of the limiting block is still below the limiting ring. At this time, the sealing plate is in a closed state under the action of the torsion spring, the position of the lifting rod remains unchanged, and the sealing member is in a sealed state.

[0014] The beneficial effects of the present invention: 1. By setting up a water bladder, a water bag is arranged inside the water bladder. A sealing part is arranged in the middle of the water bag, and the sealing part is connected to a spring reel through a sealing rope and a tensioning rope. When the water bladder is in an empty state, the sealing part can be closed and in a sealed state under the action of the sealing rope, and thus water replenishment operation can be carried out. 2. By arranging a plurality of sealing plates above the water bladder, opening ropes are connected to the sealing plates, and in cooperation with the arranged lifting ring seat and electric push rod, the sealing plates can open or close the opening above the water bladder as needed. When moving after fetching water, it can minimize the spilling of the water inside the water bladder caused by shaking as much as possible, and when the water bladder is empty, it can also prevent air flow from entering the water bladder, resulting in an increase in the overall resistance, reducing the resistance during the flight of the drone and improving the endurance ability. 3. By arranging a plurality of limiting blocks on the lower circular plate, the limiting blocks can limit the limiting ring under the action of the lifting ring seat and the squeezing roller, so that the lifting rod and the tensioning rope cannot move downward. Thus, when the water bladder is filled with water, the water bag will not open during flight transportation, and water can be effectively transported. Moreover, the overall weight of the device is light, improving the water transportation ability of the drone. Description of the Drawings

[0015] Figure 1 It is the front view of a fire - fighting and sprinkling device suspended on a drone proposed by the present invention; Figure 2 is Figure 1 the structural schematic diagram without the water bladder in Figure 3 It is the sectional view of a fire - fighting and sprinkling device suspended on a drone proposed by the present invention; Figure 4 is Figure 3 the enlarged schematic diagram at A in Figure 5 is Figure 2 the structural schematic diagram of the middle ring frame and the seal in Figure 6 is Figure 4 the enlarged schematic diagram at B in Figure 7 is Figure 2 the structural schematic diagram of the spring reel, the limiting structure and the opening mechanism in Figure 8 It is the exploded view of the limiting structure and the opening mechanism.

[0016] Reference Numerals in the Figures: 1, suspension bracket; 11, upper cover; 12, lower circular plate; 121, insertion opening; 122, linear sliding opening; 13, hook; 2, steel wire rope; 3, water bladder; 31, ring frame; 311, lower ring; 312, pressure ring; 313, cross; 32, lower cylinder; 321, water outlet; 4, water bag; 401, sealing part; 402, pulling sealing rope; 403, annular cavity; 41, tensioning rope; 42, sealing rope; 43, extrusion cylinder; 5, seal; 51, sealing plate; 511, deflection frame; 52, opening rope; 53, mounting shaft seat; 531, mounting shaft pin; 54, torsion spring; 6, spring winder; 61, lifting rod; 611, winding rope; 62, limiting ring; 7, opening mechanism; 71, electric push rod; 72, lifting ring seat; 721, circular opening; 73, extrusion roller; 8, limiting structure; 81, limiting block; 82, T-shaped block; 83, reset spring; 84, moving block. Detailed Implementation Manner

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] Refer to Figures 1-8 , a fire extinguishing and sprinkling device suspended on a drone, including a suspension bracket 1. A plurality of hooks 13 distributed in an annular array are arranged on the lower surface of the suspension bracket 1. The upper ends of the hooks 13 are connected to the suspension bracket 1 through hanging rings. A steel wire rope 2 is connected below the hooks 13. The lower ends of the plurality of steel wire ropes 2 are commonly connected to the upper end of a water bladder 3. A water bag 4 is integrally arranged at the inner bottom end of the water bladder 3. The water bag 4 is in a frustum shape, and a circular opening is provided at the center of the upper end of the water bag 4. A sealing part 401 is arranged on the inner wall of the circular opening. The sealing part 401 is formed by turning the edge of the circular opening of the water bag 4 outward and sewing. A sealing member is connected to the sealing part 401, and a tensioning rope 41 is connected to the sealing member. A seal 5 for sealing the upper part of the water bladder 3 is arranged above the water bladder 3; An upper cover 11 is fixed above the suspension bracket 1, and a lower circular plate 12 is fixed below the suspension bracket 1. A spring winder 6 is installed in the upper cover 11. A winding rope 611 is connected to the winding spring of the spring winder 6. The lower end of the winding rope 611 is connected to a lifting rod 61. A limiting ring 62 is arranged on the outer circle of the lifting rod 61. The upper end of the tensioning rope 41 is connected to the lifting rod 61. An opening mechanism 7 for opening the seal 5 and a limiting structure 8 for restricting the opening of the sealing member are also installed in the upper cover 11.

[0019] Refer to Figure 7, a through-opening 121 is formed on the lower circular plate 12. A plurality of linearly distributed sliding openings 122 are arranged around the through-opening 121 in a circular pattern, and the plurality of linearly distributed sliding openings 122 are all communicated with the through-opening 121. The size of the through-opening 121 is larger than the size of the limiting ring 62. The limiting ring 62 can be placed below the lower circular plate 12 through the through-opening 121, so as to facilitate the downward pulling out of the winding rope 611.

[0020] Refer to Figures 1-5 , a ring frame 31 is fixed above the water bag 3. The ring frame 31 includes a lower ring 311 disposed on the inner wall above the water bag 3. A cross 313 is fixed inside the inner circle of the lower ring 311. A pressing ring 312 is bolted above the lower ring 311. A plurality of hanging ears are arranged on the pressing ring 312 in a circular array. The lower ends of the plurality of steel wire ropes 2 are connected to the hanging ears. The upper end of the water bag 3 is bent inward and lapped above the lower ring 311, and then the pressing ring 312 is pressed above the bent part of the water bag 3, and the lower ring 311 and the pressing ring 312 can be fixed by bolts and nuts. A lower cylinder body 32 is fixed below the water bag 3. A plurality of uniformly distributed water outlet openings 321 are formed on the outer surface and the bottom surface of the outer circle of the lower cylinder body 32. The water outlet openings 321 are used to discharge the water inside the water bag 3, so as to extinguish the fire below. The bent part of the upper end of the water bag 3 is lapped above the lower cylinder body 32, and then an annular flange is inserted into the inner bottom end of the water bag 3 and tightly pressed against the lower cylinder body 32, and finally bolts, nuts and gaskets are used for fixing.

[0021] Refer to Figures 2-4 , the sealing part 401 is designed with a hollow interior to form an annular cavity 403. A plurality of connection notches are formed on the outer surface of the outer circle of the sealing part 401 in a circular array, and the connection notches are communicated with the annular cavity 403. The sealing member includes a pull-sealing rope 402 inserted into the annular cavity 403. A plurality of sealing ropes 42 are connected to the outer circle of the pull-sealing rope 402 in a circular array. The other ends of the plurality of sealing ropes 42 pass through the connection notches and are connected to the tensioning rope 41. When the tensioning rope 41 is pulled upward, the plurality of sealing ropes 42 below can be pulled upward together, so that the pull-sealing rope 402 located in the annular cavity 403 is pulled outwards, and the circular opening size formed by the sealing part 401 is reduced.

[0022] The lower end of the extrusion cylinder 43 passes through the circular opening and is fixed to the inner bottom end of the lower cylinder body 32. The outer diameter of the extrusion cylinder 43 gradually increases from bottom to top, and the lower end of the extrusion cylinder 43 is connected to the inner bottom end of the lower cylinder body 32. When the sealing part 401 is tightened under the action of a plurality of sealing ropes 42, the whole sealing part 401 will be pulled upward, and the diameter of the sealing part 401 will be tightened and reduced. At the same time, during the upward movement and reduction of the diameter of the sealing part 401, the inner wall of the sealing part 401 will also be closely pressed against the outer surface of the extrusion cylinder 43, thereby forming a sealing structure, so that the water in the water bag 3 will not leak.

[0023] Referring to Figure 2 , Figure 3 and Figure 5 , the seal 5 includes a plurality of fan-shaped seal plates 51. The inner ends of the seal plates 51 are welded with two groups of symmetrically distributed deflection frames 511. An installation axle pin 531 is rotatably installed between the two deflection frames 511. An installation axle seat 53 is fixed on the installation axle pin 531, and the installation axle seat 53 is fixed on the upper surface of the cross 313. A torsion spring 54 is sleeved on the installation axle pin 531. The two ends of the torsion spring 54 are respectively connected to the installation axle seat 53 and the deflection frame 511. The torsion spring 54 makes the seal plate 51 always tend to deflect downward, so that the seal plate 51 can fit on the cross 313; The size of the seal plate 51 is larger than the size of the fan-shaped opening on the cross 313, which enables the edge of the seal plate 51 to fit above the cross 313, so as to block the opening above the water bag 3, making the water inside not easy to spill out. When the water bag 3 is in an empty state and the drone is flying, the external air flow is not easy to enter the inside of the water bag 3, reducing the resistance during the flight of the drone.

[0024] Referring to Figures 5-8 , the opening mechanism 7 includes two groups of electric push rods 71 symmetrically fixed inside the upper cover 11. A lifting ring seat 72 is connected to the push rod of the electric push rod 71. A circular opening 721 is provided at the center of the lifting ring seat 72. The lower end of the lifting rod 61 passes downward through the circular opening 721 and is placed below the lifting ring seat 72. A plurality of opening ropes 52 distributed in an annular array are connected below the lifting ring seat 72. The lower ends of the opening ropes 52 are connected to the seal plate 51. Cross-coupled control is adopted between the two electric push rods 71. The synchronous error (position difference or speed difference) of the two electric push rods 71 is introduced into their respective closed-loop controls to achieve mutual compensation. Through the "cross-coupled" algorithm, the outputs of the two electric push rods 71 are adjusted simultaneously; When the push rod of the electric push rod 71 rises, it will drive the lifting ring seat 72 to move upward together. The rising lifting ring seat 72 will cause the seal plate 51 to deflect around the installation axle pin 531 through the opening rope 52, and the outer end of the seal plate 51 will tilt up, so that the opening above the water bag 3 is opened and the water bag 3 can be replenished with water; Above the lifting ring seat 72, a plurality of extrusion rollers 73 distributed in an annular array are rotatably installed through a shaft frame and a shaft pin.

[0025] Referring to Figures 6-8 , the limiting structure 8 includes a plurality of limiting blocks 81. A strip-shaped opening is formed through the upper and lower parts of the limiting block 81. A T-shaped block 82 is slidably inserted into the strip-shaped opening. The bottom end of the T-shaped block 82 is fixed on the lower circular plate 12. A return spring 83 is arranged in the strip-shaped opening. The two ends of the return spring 83 are respectively abutted against the T-shaped block 82 and the inner wall of the strip-shaped opening. The size of the strip-shaped opening is smaller than the size of the linear sliding opening 122. The T-shaped block 82 can be directly fixed on the lower circular plate 12. The return spring 83 makes the limiting block 81 always have a tendency to move outwards.

[0026] Below the inner side of the limiting block 81, a moving block 84 is arranged. The moving block 84 passes through the linear sliding opening 122 and is located below the lower circular plate 12. A part of the outer side of the moving block 84 is cut off to form a contact inclined surface. The contact inclined surface is in rolling contact with the extrusion roller 73; When the limiting block 81 is at the outermost end, the outer side of the contact inclined surface is still inside the inner end of the extrusion roller 73. When the water bag 3 is empty inside, the coil spring in the spring winder 6 will make the lifting rod 61 and the limiting ring 62 move upwards through the winding rope 611. At this time, the limiting ring 62 is above a plurality of limiting blocks 81. The push rod of the electric push rod 71 drives the lifting ring seat 72 to move upwards. The extrusion roller 73 will contact the contact inclined surface of the moving block 84 and push the moving block 84 to move linearly inwards, so that a plurality of limiting blocks 81 can move inwards synchronously. The inner end of the limiting block 81 will be below the limiting ring 62, so as to be able to limit the downward movement of the limiting ring 62, so that the lifting rod 61 and the tensioning rope 41 cannot move downwards, and the sealing member cannot be opened. At the same time, the rising lifting ring seat 72 will drive the opening rope 52 to move upwards together. The lower end of the opening rope 52 will pull the outer end of the sealing plate 51 to open, and the inside of the water bag 3 can be replenished with water; After the water replenishment is completed, the lifting ring seat 72 moves downwards under the action of the electric push rod 71. As the lifting ring seat 72 and the extrusion roller 73 move downwards, the limiting block 81 will move outwards under the action of the return spring 83. When the lifting ring seat 72 moves downwards for a certain distance, at this time, the extrusion roller 73 is still in contact with the contact inclined surface, and a part of the inner end of the limiting block 81 is still below the limiting ring 62. At this time, the sealing plate 51 is in a closed state under the action of the torsion spring 54, the position of the lifting rod 61 remains unchanged, and the sealing member is in a sealed state.

[0027] Working principle: A hanging ring is welded to the top of the upper cover 11. The sprinkler device is suspended and fixed under the drone through the hanging ring. In the initial state, since the water bladder 3 is empty and not filled with water, the entire water bag 4 and other components are relatively light in weight, and their combined weight is less than the rewinding force of the internal spring of the spring winder 6. The spring winder 6 causes the winding rope 611 to be wound inside the spring winder 6. The lifting rod 61 is at the uppermost position, and the tensioning rope 41 connected to the lower end of the lifting rod 61 is pulled upward and is in a taut state. Multiple sealing ropes 42 connected to the tensioning rope 41 will also be pulled up and tightened. At this time, the sealing rope 402 located in the annular cavity 403 is tightened, and the circular opening size on the sealing part 401 decreases and tightly presses against the outer surface of the extrusion cylinder 43, thereby forming a sealed structure to prevent the water in the water bladder 3 from leaking; At the same time, the limiting ring 62 on the lifting rod 61 is above multiple limiting blocks 81. The push rod of the electric push rod 71 moves upward and is in a retracted state. The lifting ring seat 72 will also move upward under the action of the push rod of the electric push rod 71. The upward-moving lifting ring seat 72 will also drive multiple opening ropes 52 to move upward. The upward-pulled opening ropes 52 cause the sealing plate 51 to deflect around the mounting pivot pin 531, and the outer end of the sealing plate 51 will tilt upward, thereby opening the opening above the water bladder 3; Multiple pressing rollers 73 on the lifting ring seat 72 move upward accordingly and will contact the contact inclined surface of the moving block 84 below the limiting block 81 during the upward movement. Since the limiting block 81 can only move linearly inward or outward under the action of the T-shaped block 82, the pressing roller 73 will push the moving block 84 inward during the upward movement, thereby causing multiple limiting blocks 81 to move inward synchronously. When the pressing roller 73 is at the uppermost position, the limiting block 81 is below the limiting ring 62 at this time. The circular structure size formed by the inner ends of multiple limiting blocks 81 is smaller than the outer diameter of the limiting ring 62, thereby being able to limit the lifting rod 61 and prevent the lifting rod 61 and the tensioning rope 41 from moving downward, keeping the water bag 4 in a closed state all the time.

[0028] The sprinkler device can perform water replenishment operations outdoors in the above state. We can directly replenish water inward through the opened opening, or control the drone to drive the device to move above rivers or lakes. Then the drone descends so that the sprinkler device falls onto the water surface. The lower part of the sprinkler device will sink underwater. Then the drone flies forward to make the entire sprinkler state inclined, and water will continuously flow into the water bladder 3. After the water replenishment is completed, fly up again. After the water bladder 3 is replenished with water, the pressure at the bottom end inside the water bladder 3 will increase. Part of the water bag 4 will be under downward pressure, which will cause the sealing part 401 to press more tightly against the outer surface of the pressing roller 73, and the overall sealing effect is better. The process of the drone replenishing water is similar to the existing method of a fire-fighting helicopter lifting a fire bucket to replenish water; After that, the lifting ring seat 72 moves downward a certain distance under the action of the electric push rod 71. As the lifting ring seat 72 and the squeezing roller 73 move downward, the limiting block 81 will move outward under the action of the reset spring 83. When the lifting ring seat 72 moves downward a certain distance, at this time, the squeezing roller 73 still contacts the contact inclined surface, and the inner end part of the limiting block 81 is still below the limiting ring 62. At this time, the sealing plate 51 is in a closed state under the action of the torsion spring 54, the lifting rod 61 remains unchanged in position, and the sealing state is still maintained between the sealing part 401 and the extrusion cylinder 43. In this way, when the drone is hoisting and transporting the sprinkler device, it can minimize the spilling of the water inside the water bag 3 caused by shaking as much as possible.

[0029] When the drone flies to the required fire extinguishing position, the push rod of the electric push rod 71 continues to move downward, and the lifting ring seat 72 and the squeezing roller 73 will also continue to move downward. The multiple limiting blocks 81 will move outward away from the limiting ring 62 under the action of the reset spring 83. When the lifting ring seat 72 descends to the maximum extent, at this time, the multiple limiting blocks 81 are completely separated from the limiting ring 62, and the limiting ring 62 will not be restricted by the limiting blocks 81 at this time and can move downward freely; Since the water bag 4 inside the water bag 3 is always subjected to a downward movement, under the action of the gravity of the water, the middle part of the water bag 4 and the multiple sealing ropes 42 and the tension ropes 41 will all move downward, so that the round opening of the sealing part 401 will be opened, the water will flow into the lower cylinder body 32, and finally be discharged through the water outlet 321 to extinguish the fire below; After the water inside the water bag 3 is discharged, the weight of the water bag 4 and the sealing ropes 42 and the tension ropes 41 connected thereto is less than the rewinding force of the inner spring of the spring reel 6. The water bag 4 will be sealed again and in a sealed state. At the same time, the lifting rod 61 drives the limiting ring 62 to move upward again and be above the limiting block 81. At this time, the sealing plate 51 is still in a closed state. In this way, the drone can avoid the air flow entering the water bag 3 during flight, which causes an increase in the overall resistance, reduce the resistance during the flight of the drone, and improve the endurance; After that, when the drone performs the operations of replenishing water and extinguishing and sprinkling water again, just repeat the above multiple operation steps.

[0030] By setting the water bag 3, a water bag 4 is arranged inside the water bag 3, a sealing part 401 is arranged at the middle part of the water bag 4, and the sealing part 401 is connected to the spring reel 6 through the sealing rope 42 and the tension rope 41. When the water bag 3 is in an empty state, the sealing part 401 can be closed and in a sealed state under the action of the sealing rope 42, and thus the water replenishing operation can be carried out; By arranging a plurality of sealing plates 51 above the water bag 3, an opening rope 52 is connected to the sealing plate 51, and in cooperation with the arranged lifting ring seat 72 and the electric push rod 71, the sealing plate 51 can open or close the opening above the water bag 3 as needed. When moving after taking water, it can minimize the spilling of the water inside the water bag 3 caused by shaking. Moreover, when the water bag 3 is empty, it can also prevent air flow from entering the inside of the water bag 3, resulting in an increase in the overall resistance, reduce the resistance during the flight of the drone, and improve the endurance ability; By arranging a plurality of limiting blocks 81 on the lower circular plate 12, the limiting blocks 81 can limit the limiting ring 62 under the action of the lifting ring seat 72 and the squeezing roller 73, so that the lifting rod 61 and the tensioning rope 41 cannot move downward. Furthermore, when the water bag 3 is filled with water, the water bag will not open during the flight and transportation process, and water can be effectively transported. Moreover, the overall weight of the device is light, which improves the water transportation ability of the drone.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A fire extinguishing and sprinkling device suspended on a drone, characterized in that, It includes a suspension rack (1). A plurality of hooks (13) distributed in an annular array are arranged on the lower surface of the suspension rack (1). A steel wire rope (2) is connected below the hook (13). The lower ends of the plurality of steel wire ropes (2) are jointly connected to the upper end of a water bag (3). A water pocket (4) is integrally arranged at the bottom end inside the water bag (3). The water pocket (4) has a frustum-shaped structure, and a round opening is provided at the center of the upper end of the water pocket (4). A sealing part (401) is arranged on the inner wall of the round opening. A sealing member is connected to the sealing part (401), and a tension rope (41) is connected to the sealing member. A sealing member (5) for sealing the upper part thereof is arranged above the water bag (3); An upper cover (11) is fixed above the suspension rack (1), and a lower circular plate (12) is fixed below the suspension rack (1). A spring rewinder (6) is installed inside the upper cover (11). A winding rope (611) is connected to the winding spring of the spring rewinder (6). The lower end of the winding rope (611) is connected to a lifting rod (61). A limiting ring (62) is arranged on the outer circle of the lifting rod (61). The upper end of the tension rope (41) is connected to the lifting rod (61). An opening mechanism (7) for opening the sealing member (5) and a limiting structure (8) for restricting the opening of the sealing member are also installed inside the upper cover (11).

2. The fire extinguishing and sprinkling device suspended on a drone according to claim 1, characterized in that, A through interface (121) is provided on the lower circular plate (12). A plurality of linearly distributed sliding openings (122) distributed in a ring are arranged around the through interface (121), and the plurality of linearly distributed sliding openings (122) are all communicated with the through interface (121). The size of the through interface (121) is larger than the size of the limiting ring (62).

3. A fire extinguishing and sprinkling device suspended on a drone according to claim 1, characterized in that, A ring frame (31) is fixed above the water bag (3). The ring frame (31) includes a lower ring (311) placed on the inner wall above the water bag (3). A cross (313) is fixed inside the inner circle of the lower ring (311). A pressing ring (312) is bolted above the lower ring (311). A plurality of hanging ears distributed in an annular array are arranged on the pressing ring (312). The lower ends of the plurality of steel wire ropes (2) are connected to the hanging ears; A lower cylinder body (32) is fixed below the water bag (3). A plurality of uniformly distributed water outlet openings (321) are provided on the outer surface and the bottom surface of the lower cylinder body (32).

4. A fire extinguishing and sprinkling device suspended on a drone according to claim 1, characterized in that, The sealing part (401) is designed with a hollow interior to form an annular cavity (403). A plurality of connecting notches distributed in an annular array are provided on the outer surface of the sealing part (401). The connecting notches are communicated with the annular cavity (403); The sealing member includes a pulling sealing rope (402) inserted into the annular cavity (403). A plurality of sealing ropes (42) distributed in an annular array are connected to the outer circle of the pulling sealing rope (402). The other ends of the plurality of sealing ropes (42) pass through the connecting notches and are connected to the tension rope (41).

5. The fire extinguishing and sprinkling device suspended on a drone according to claim 3, characterized in that, The lower end of the extrusion cylinder (43) passes through the round opening and is fixed to the bottom end inside the lower cylinder body (32), and a rope is connected to the lower end of the extrusion cylinder (43). The other end of the rope is connected to the bottom end inside the lower cylinder body (32).

6. A fire extinguishing and sprinkling device suspended on a drone according to claim 3, characterized in that, The seal (5) includes a plurality of sealing plates (51) in a fan-shaped structure. Two sets of symmetrically distributed deflection frames (511) are welded to the inner ends of the sealing plates (51). An installation axle pin (531) is rotatably installed between the two deflection frames (511). An installation axle seat (53) is fixed on the installation axle pin (531). The installation axle seat (53) is fixed on the upper surface of the cross (313). A torsion spring (54) is sleeved on the installation axle pin (531). The two ends of the torsion spring (54) are respectively connected to the installation axle seat (53) and the deflection frame (511).

7. The fire extinguishing and sprinkling device suspended on a drone according to claim 6, characterized in that, The opening mechanism (7) includes two sets of electric push rods (71) symmetrically fixed inside the upper cover (11). A lifting ring seat (72) is connected to the push rod of the electric push rod (71). A circular opening (721) is formed at the center of the lifting ring seat (72). The lower end of the lifting rod (61) passes downward through the circular opening (721) and is located below the lifting ring seat (72). A plurality of opening ropes (52) distributed in an annular array are connected below the lifting ring seat (72). The lower ends of the opening ropes (52) are connected to the sealing plate (51). A plurality of extrusion rollers (73) distributed in an annular array are rotatably installed above the lifting ring seat (72) through a shaft frame and a shaft pin.

8. A fire extinguishing and sprinkling device suspended on a drone according to claim 2, characterized in that, The limiting structure (8) includes a plurality of limiting blocks (81). A strip-shaped opening is formed through the limiting block (81) up and down. A T-shaped block (82) is slidably inserted into the strip-shaped opening. The bottom end of the T-shaped block (82) is fixed on the lower circular plate (12). A return spring (83) is arranged in the strip-shaped opening. The two ends of the return spring (83) are respectively abutted against the T-shaped block (82) and the inner wall of the strip-shaped opening.

9. The fire extinguishing and sprinkling device suspended on a drone according to claim 8, characterized in that, A moving block (84) is arranged below the inner side of the limiting block (81). The moving block (84) passes through the linear sliding opening (122) and is located below the lower circular plate (12). A contact inclined surface is formed by removing a part of the outer side of the moving block (84). The contact inclined surface is in rolling contact with the extrusion roller (73). When the limiting block (81) is at the outermost end, the outer side of the contact inclined surface is still inside the inner end of the extrusion roller (73).

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