An unmanned aerial vehicle (UAV) launched large water volume emergency fire extinguishing water bomb and a use method thereof

Abstract

The application provides an unmanned aerial vehicle (UAV) launched large water volume emergency fire extinguishing water bomb and a use method thereof, and relates to the technical field of emergency fire extinguishing. The invention comprises a fin, a liquid-filled partition, a central propellant column groove and a central propellant column. The fin is arranged at the upper end of the bomb tail. The fin comprises a first fin, a second fin, a third fin and a fourth fin. The liquid-filled partition comprises a first liquid-filled partition and a second liquid-filled partition arranged in parallel. The first liquid-filled partition is arranged at the joint of the bomb tail and the bomb body shell. The second liquid-filled partition is arranged at the front half of the bomb body shell. The central propellant column groove is arranged in the bomb body shell. The top end of the central propellant column groove is located in the bomb tail. The bottom end of the central propellant column groove is located in the bomb head. The central propellant column groove is provided with a central propellant column. The components of the application can be disassembled and transported. The bomb body is separated from the propellant. According to different fire conditions, the suitable bomb body components are replaced and assembled on site in a large amount to realize large-area and timely bomb launching.

Description

Technical Field

[0001] This invention relates to the field of emergency fire fighting technology, and in particular to a large-volume emergency fire extinguishing water bomb deployed by a drone and its usage method. Background Technology

[0002] Fires pose irreversible threats to life, property, and the ecological environment. Traditional methods for extinguishing forest and grassland fires include helicopters carrying water bags, establishing firebreaks, and manual firefighting. The first two traditional methods suffer from poor mobility, timeliness, and controllability, leading to the spread of fires and being too costly to extinguish early-stage fires. In recent years, the application of various firefighting technologies, especially the emergence of various fire extinguishing bombs, has exposed the drawbacks of traditional methods. Launched fire extinguishing bombs are highly dangerous, costly, and lack mobility; powder-based fire extinguishing bombs have a significant impact on environmental pollution and are also costly; common water-based fire extinguishing bombs are inadequate in terms of portability, transportability, controllability, and safety, and also have a limited effective range and poor firefighting results.

[0003] Given that early-stage fires are typically small in area, relatively weak, spread rapidly, and are easily extinguished and controlled, the advantages of drones—high mobility and lack of terrain constraints—allow them to quickly and flexibly appear at the fire site and deliver precise fire extinguishing bombs. These fire extinguishing water bombs can be assembled and filled on-site near the fire, enabling swarms of drones to quickly deploy bombs and extinguish large-scale fires. Ultimately, this extinguishes the initial fire, providing ample time for subsequent assistance. Summary of the Invention

[0004] To address the shortcomings mentioned above, this invention provides a method for deploying large-volume emergency fire extinguishing water bombs by drones and its usage. The components are detachable for transport, the bomb body is separated from the explosive charge, and adjustments can be made in a timely manner according to different fire conditions. Appropriate bomb body components can be replaced, and large-scale assembly can be carried out on-site to achieve timely bombing over a large area. In a designated fire site, after multiple bombings, the fire extinguishing rate can reach 80%-100%.

[0005] To address the aforementioned problems, this invention provides a large-volume emergency fire extinguishing water bomb deployed by an unmanned aerial vehicle (UAV), comprising a warhead, a shell, and a tail. The upper end of the shell is provided with an upper threaded interface, through which the upper end of the shell connects to the tail. The lower end of the shell is provided with a lower threaded interface, through which the lower end of the shell connects to the warhead. The bomb also includes fins, a liquid-filling baffle, a central propellant groove, and a central propellant grain. The fins are located at the upper end of the tail and include a first fin, a second fin, a third fin, and a... The fourth wing is provided, and the first wing, the second wing, the third wing, and the fourth wing are arranged perpendicularly to each other at 90°. The liquid filling baffle includes a first liquid filling baffle and a second liquid filling baffle arranged in parallel. The first liquid filling baffle is located at the connection between the tail of the projectile and the projectile shell. The second liquid filling baffle is located at the front half of the projectile shell. The central propellant groove is located inside the projectile shell, and the top end of the central propellant groove is located inside the tail of the projectile. The bottom end of the central propellant groove is located inside the projectile head. The central propellant is provided inside the central propellant groove.

[0006] Preferably, the tip of the projectile is provided with a liquid filling port, and a liquid filling port piston is provided at the liquid filling port, and the liquid filling port piston is connected to the liquid filling port with an interference fit.

[0007] Preferably, a liquid-repellent pad is provided inside the projectile, the liquid-repellent pad is located at the front half of the projectile, and the liquid-repellent pad is fixedly connected to the periphery of the projectile by waterproof adhesive.

[0008] Preferably, a stabilizer is provided on the tail of the projectile, and the stabilizer is a square frame stabilizer made of thin steel plate.

[0009] Preferably, the liquid-filling partition is provided with a circular opening, which includes a first circular opening, a second circular opening, a third circular opening and a fourth circular opening. The first circular opening and the second circular opening are provided on the first liquid-filling partition, and the third circular opening and the fourth circular opening are provided on the second liquid-filling partition.

[0010] Preferably, the projectile casing includes an outer shell and an inner liner, wherein the inner diameter of the outer shell and the inner diameter of the inner liner are both gradually tapering from the tail end of the projectile to the head end.

[0011] Preferably, the central explosive charge consists of an No. 8 industrial electric detonator and a passivated RDX detonating cord with a charge weight of 30g / m, and the outer side of the central explosive charge groove is waterproofed.

[0012] Preferably, the projectile is oval-shaped, with a length of 1-2 times the projectile diameter and a generatrix of 0.75 times the projectile diameter.

[0013] Preferably, the tail of the projectile is conical, made of ABS engineering plastic with a thickness of 5mm-10mm and a length of 0.5-2 times the radius of the projectile shell.

[0014] A method for using large-volume emergency fire extinguishing water bombs deployed by a drone, comprising the following steps:

[0015] S10. One part of the projectile is pre-installed in advance while ensuring that the explosive charge is separated from the casing. At the same time, a pre-set sensor is selected according to the fire situation. The other part of the projectile is transported to the site and the number of units to be assembled is determined according to the fire situation.

[0016] S20. Pour the prepared water-based fire extinguishing agent into the shell of the projectile, and at the same time seal the piston of the filling port.

[0017] S30: The missile body is mounted on the drone, the drone flies above the fire point, and the main switch is remotely turned on.

[0018] S40. For forest canopy fire extinguishing, detonate at a height of 8m-10m from the fire source.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. Working mechanism of the fire extinguishing water bomb of this invention: The explosion of the central explosive charge ruptures the shell, and the fire extinguishing agent inside the shell forms a water mist under the action of the shock wave, eventually forming a sprayed fire extinguishing water mist. When the water droplets enter the flame zone, the water evaporates and absorbs a large amount of heat, reducing the flame temperature. At the same time, the water vapor produced by evaporation reduces the oxygen concentration in the flame zone. Some of the larger water droplets that pass through the flame zone reach the surface of the burning material, reducing the surface temperature and thus achieving the fire extinguishing effect. The water mist forms a water curtain that absorbs the infrared radiation generated by the fire, preventing the fire from spreading, and simultaneously achieving a small-scale oxygen isolation, ultimately achieving an effective fire extinguishing effect. Compared with traditional helicopters carrying water bags, this method has a better fire extinguishing effect, is more cost-effective, and can effectively ensure the timeliness and thoroughness of fire extinguishing.

[0021] 2. The shell of this invention is designed with a gradually changing inner diameter, and the shells can be stacked during transportation. The tapered body not only reduces air resistance but also shifts the center of gravity forward, thereby improving the stability of the projectile during ballistic flight. The shell material is made of carbon fiber composite material, which reduces the weakening of the shock wave by the shell and affects the fire extinguishing effect. The projectile is assembled from various components, so it can be transported in large quantities to the vicinity of the fire source for on-site assembly, ensuring both timeliness and scale, as well as the fire extinguishing effect.

[0022] 3. In this invention, the explosive charge is separated from the projectile body, which effectively ensures the safety of the projectile. The amount of explosive charge can be controlled according to the length and number of detonating cords. Compared with fire extinguishing grenades on the market, it offers higher safety and stronger controllability.

[0023] 4. The four circular openings on the two liquid-filled baffles of this invention are misaligned. After the projectile leaves the aircraft, the liquid will impact the projectile due to gravity, affecting its flight attitude. The two liquid-filled baffles can effectively reduce the impact of the liquid on the projectile.

[0024] 5. This invention utilizes drones to transport the extinguishing bomb to a certain height above the fire source for deployment. For forest canopy fires, detonation occurs at a height of 8-10 meters above the fire source, achieving a water mist coverage area of ​​over 20 square meters. For grassland and surface fires, detonation occurs at a height of 8-10 meters above the ground, achieving a water mist coverage area of ​​over 20 square meters. For fires outside high-rise buildings, detonation occurs at a height of 6-8 meters, achieving a water mist coverage area of ​​over 15 square meters. For small to medium-sized fires inside high-rise buildings, the height sensor is replaced with a detonation control sensor. The extinguishing bomb is dropped onto the fire source and detonated manually, achieving a water mist coverage area of ​​over 10 square meters. Depending on the fire extinguishing situation, multiple drops can be performed, achieving a fire extinguishing rate of 80%-100%. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external structure of the projectile in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the projectile in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the tail structure of an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and examples, but the examples are not intended to limit the invention.

[0029] like Figures 1 to 3 As shown, the embodiments of the present invention include a filling port piston 1, a filling baffle 2, a projectile shell 3, a central propellant groove 8, a central propellant 4, a liquid-separating gasket 5, a control chamber 6, a tail 9, a warhead 7, fins 10, and a stabilizer 11.

[0030] In this embodiment, the projectile casing 3 includes an outer shell and an inner liner. The outer shell is made of carbon fiber composite material and ABS engineering plastic, with a thickness of 2mm-3mm. Its inner diameter is a gradually changing inner diameter, tapering from the tail 9 towards the nose 7 at a tapering angle of 1°. o -5 o The inner liner is made of aluminum plate, 2mm-3mm thick, with grooves circumferentially grooved at 15° intervals, each groove 1mm-1.5mm thick. The inner diameter is gradually tapering, tapering from section 9 at the tail to section 7 at the nose, with a tapering angle of 1°. o -5o The projectile casing 3 has a pre-drilled threaded interface, which allows the projectile casing 3 to be connected to the projectile head 7 and the projectile tail 9 by threads. After assembly, it is then fixed a second time with glue. The projectile radius is 100mm-200mm and the projectile length is 2-5 times the radius.

[0031] In this embodiment, two liquid-filled baffles 2 are located at the tail 9 and the front half of the projectile body, respectively, and are fixed with bolts in pre-reserved slots, allowing them to be removed during transportation. The front liquid-filled baffle is made of carbon fiber composite material with a thickness of 4mm-6mm; the rear liquid-filled baffle is made of alloy steel with a thickness of 4mm-6mm. Alloy steel is chosen to increase the counterweight and concentrate the center of gravity in the front third of the projectile body.

[0032] In this embodiment, the central propellant 4 is installed in the central propellant trough 8, and its charge is separated from the projectile during transportation to ensure personnel safety. The specific charge has a significant impact on the water fragmentation effect and water mist dispersion, according to the specific charge formula... Based on the required water volume, the charge quantity can be determined. The central charge consists of an 8-gauge industrial electric detonator and a passivated RDX detonating cord with a charge weight of 30g / m. The central charge is waterproofed, and the charge quantity is controlled by adjusting the number and length of the detonating cord. Simultaneously, the detonator is connected to a height sensor in the control compartment via a wire to achieve controlled detonation of the central charge.

[0033] In this embodiment, the warhead 7 is typically oval-shaped, with a length of 1-2 times the projectile diameter and a generatrix length of 0.75 times the projectile diameter. For extinguishing forest and grassland fires, the warhead 7 is made of high-strength alloy steel, such as 58SiMn or D60 steel, with a thickness of 3mm-5mm. If the warhead 7 remains intact after the fire is extinguished, it can be reused. For extinguishing fires on the exterior of high-rise buildings, the warhead 7 is made of ABS engineering plastic with a thickness of 5mm-10mm.

[0034] In this embodiment, both the liquid-sealing gasket 5 and the filling port piston 1 are made of nitrile rubber. The liquid-sealing gasket 5 is located at the front half of the projectile head, and the specific position is determined according to the size of the control compartment and the actual assembly. The liquid-sealing gasket 5 is fixed to the projectile head 7 with waterproof adhesive and has a thickness of 10mm. The filling port piston 1 is used to seal the filling port of the projectile tail 9. It has a thickness of 5mm and is in an interference fit with the filling port. It is then fixed to the projectile tail 9 with waterproof adhesive.

[0035] In this embodiment, the nine sections of the projectile tail are conical, made of ABS engineering plastic with a thickness of 5mm-10mm and a length of 0.5-2 times the projectile radius. The fins are fixed to the projectile tail, with the four fins having an angle of 90 degrees. oThe fins are made of aluminum alloy with a thickness of 4mm-8mm. The tail section 9 is equipped with a stabilizer 11, which is a square-frame stabilizer made of thin steel plate to reduce the projectile rollover caused by aerodynamic disturbances.

[0036] In this embodiment, a control compartment 6 is provided at the bottom of the warhead 7. The control compartment 6 consists of a battery, an altitude sensor, a main switch, and wires. The main switch is remotely activated when the warhead reaches the predetermined fire point. The main switch controls whether all circuits of the warhead are powered. For forest canopy fire extinguishing, the warhead is detonated at a height of 8m-10m from the fire source; for grassland and surface fires, the warhead is detonated at a height of 8m-10m from the ground; for fires outside tall buildings, the warhead is detonated at a height of 6m-8m from the fire source; for small to medium-sized fires inside tall buildings, the altitude sensor is replaced with a detonation control sensor, and the warhead is thrown to the fire source and detonated remotely.

[0037] In this embodiment, the fire extinguishing agent inside the projectile is a water-based extinguishing agent. For ordinary initial fires, the extinguishing agent is a saturated NaCl solution; for larger initial fires, a small amount of additives, such as surface thickeners and activators, are added to the water.

[0038] Example 1:

[0039] A portable, high-volume fire extinguishing water bomb deployed by an unmanned aerial vehicle (UAV) includes a filling port piston 1, a filling baffle 2, a bomb body shell 3, a central propellant groove 8, a central propellant grain 4, a liquid-separating gasket 5, a control compartment 6, a tail 7, a warhead 9, fins 10, and a stabilizer 11. The bomb body shell 3 comprises an outer shell and an inner liner. The outer shell is made of carbon fiber composite material with a thickness of 2mm and a gradually decreasing inner diameter, tapering from the tail to the warhead at a 3° angle. The inner liner is made of aluminum plate with a thickness of 2mm, featuring circumferential grooves at 15° intervals, each groove being 1mm thick. It also has a gradually decreasing inner diameter, tapering from the tail to the warhead at a 3° angle. Threaded interfaces are pre-drilled at both ends of the shell for connection to the warhead and tail via threads. After assembly, secondary fixation is achieved using adhesive. The bomb body radius is 100mm, and the length is three times the radius. Two liquid-filled baffles are located at the tail and halfway point of the projectile body, secured with bolts in pre-drilled slots and removable for transport. The front liquid-filled baffle is made of carbon fiber composite material with a thickness of 4mm; the rear liquid-filled baffle is made of alloy steel (ABS engineering plastic is used for multi-story fire suppression) with a thickness of 6mm. Alloy steel is chosen to increase counterweight and concentrate the center of gravity in the front third of the projectile body. The central charge 4 is installed in the central charge slot 8, which is a hollow cylinder formed by a 2mm thick aluminum plate. The charge and the projectile body are separated during transport to ensure personnel safety. The central charge consists of an 8-gauge industrial electric detonator and a passivated RDX detonating cord with a charge of 30g / m. The central charge is waterproofed, and the charge amount is controlled by adjusting the number and length of the detonating cord. The projectile body is estimated to hold 12L of water, requiring 10g of explosive. The detonator is connected to a height sensor in the control compartment via a wire to control the detonation of the central charge. The projectile's warhead is oval-shaped, with a length equal to one bullet diameter and a generatrix of 0.75 bullet diameter. For extinguishing forest and grassland fires, the warhead is made of high-strength alloy steel (58SiMn steel) with a thickness of 3mm. If the warhead remains intact after extinguishing the fire, it can be reused during fire scene treatment. For extinguishing fires inside and outside high-rise buildings, the warhead is made of ABS engineering plastic with a thickness of 5mm. Both the liquid-sealing gasket 5 and the filling port piston 1 are made of nitrile rubber. The liquid-sealing gasket 5 is located in the front half of the warhead, with the specific position determined according to the size of the control compartment. The liquid-sealing gasket 5 is fixed to the warhead with waterproof adhesive and has a thickness of 10mm. The filling port piston 1, used to seal the liquid inlet at the tail of the projectile, has a thickness of 5mm and is interference-fitted with the filling port. It is further fixed to the tail of the projectile with waterproof adhesive. The tail of the projectile is conical, made of ABS engineering plastic with a thickness of 5mm, and its length is one bullet radius. The wing 10 is fixed to the tail 9 of the missile. The angle of the four wings is 90°. The material of the wing 10 is aluminum alloy with a thickness of 4mm. A square frame type stabilizer is used, which is made of thin steel plate. The control compartment 6 mainly consists of batteries, altitude sensors, wires, and a main switch.For forest canopy fire suppression, detonation is performed at a height of 8 meters above the fire source; for grassland and surface fires, detonation is performed at a height of 8 meters above the ground; for fires outside tall buildings, detonation is performed at a height of 6 meters; for small to medium-sized fires inside tall buildings, the height sensor is modified into a detonation control sensor, and the fire extinguishing bomb is thrown towards the fire source and detonated remotely. The water-based fire extinguishing agent inside the bomb is a saturated NaCl solution.

[0040] Deploying the water mist via drones at a certain height above the fire source, the system can effectively extinguish forest canopy fires. For canopy fires, detonation at a height of 8 meters above the fire source results in a water mist coverage area of ​​20 square meters. For grassland and surface fires, detonation at a height of 8 meters above the ground also achieves a water mist coverage area of ​​20 square meters. For fires outside tall buildings, detonation at a height of 6 meters above the fire source results in a water mist coverage area of ​​15 square meters. For small to medium-sized fires inside tall buildings, the water mist coverage area can reach 10 square meters. Based on the extinguishing effect, multiple drops can be performed, achieving a fire suppression rate of up to 80%.

[0041] Example 2:

[0042] A portable, high-volume fire extinguishing water bomb deployed by an unmanned aerial vehicle (UAV) includes a filling port piston 1, a filling baffle 2, a bomb body shell 3, a central propellant groove 8, a central propellant grain 4, a liquid-separating gasket 5, a control compartment 6, a tail 7, a warhead 9, fins 10, and a stabilizer 11. The bomb body shell 3 comprises an outer shell and an inner liner. The outer shell is made of carbon fiber composite material with a thickness of 2.5 mm and a gradually decreasing inner diameter, tapering from the tail to the warhead at a 2° angle. The inner liner is made of aluminum plate with a thickness of 2.5 mm, with grooves 1.5 mm thick circumferentially grooved at 15° intervals, also with a gradually decreasing inner diameter, tapering from the tail to the warhead at a 2° angle. Threaded interfaces are provided at both ends of the shell for threaded connection to the warhead 7 and tail 9, and secondary fixation is achieved with adhesive after assembly. The bomb body radius is 200 mm, and the bomb body length is four times the radius. Two liquid-filled baffles are located at the tail and halfway point of the projectile body, secured with bolts in pre-drilled slots and removable for transport. The front liquid-filled baffle is made of carbon fiber composite material with a thickness of 4mm; the rear liquid-filled baffle is made of alloy steel (ABS engineering plastic is used for multi-story fire suppression) with a thickness of 5mm. Alloy steel is chosen to increase counterweight and concentrate the center of gravity in the front third of the projectile body. The central charge 4 is installed in the central charge slot 8, which is a hollow cylinder formed by a 2mm thick aluminum plate. The charge and the projectile body are separated during transport to ensure personnel safety. The central charge consists of an 8-gauge industrial electric detonator and a passivated RDX detonating cord with a charge weight of 30g / m. The central charge is waterproofed, and the charge weight is controlled by adjusting the number and length of the detonating cord. The projectile body contains 100L of water and 80g of explosive. The detonator is connected to a height sensor in the control compartment via a wire to control the detonation of the central charge. The projectile's warhead is oval-shaped, with a length equal to one bullet diameter and a generatrix of 0.75 bullet diameter. For extinguishing forest and grassland fires, the warhead is made of D60 steel with a thickness of 3mm. If the warhead remains intact after the fire is extinguished, it can be reused during fire scene treatment. For extinguishing fires inside and outside high-rise buildings, the warhead is made of ABS engineering plastic with a thickness of 6mm. Both the liquid-sealing gasket 5 and the filling port piston 1 are made of nitrile rubber. The liquid-sealing gasket 5 is located in the front half of the warhead, with the specific position determined according to the size of the control compartment. The liquid-sealing gasket 5 is fixed to the warhead with waterproof adhesive and has a thickness of 10mm. The filling port piston 1, used to seal the liquid inlet at the tail of the projectile, has a thickness of 5mm and is press-fitted to the filling port. It is further fixed to the tail of the projectile 9 with waterproof adhesive. The tail of the projectile is conical, made of ABS engineering plastic with a thickness of 6mm, and its length is one bullet radius. The wing 10 is fixed to the tail 9 of the missile. The four wing circumferential angles are 90°, and the wing material is aluminum alloy with a thickness of 5mm. A stabilizer 11 is added to the tail 9. This missile uses a square-frame stabilizer made of thin steel plate. The control compartment 6 mainly consists of a battery, an altitude sensor, wires, and a main switch.For forest canopy fire suppression, detonation is performed at a height of 8 meters above the fire source; for grassland and surface fires, detonation is performed at a height of 8 meters above the ground; for fires outside tall buildings, detonation is performed at a height of 6 meters; for small to medium-sized fires inside tall buildings, the height sensor is modified into a detonation control sensor, and the fire extinguishing bomb is thrown towards the fire source and detonated remotely. The water-based fire extinguishing agent inside the bomb is a saturated NaCl solution.

[0043] The extinguishing bombs are transported by drones and dropped at a certain height above the fire source. For forest canopy fires, detonation at a height of 8 meters above the fire source can achieve a water mist coverage area of ​​30 square meters. For grassland and surface fires, detonation at a height of 8 meters above the ground can achieve a water mist coverage area of ​​30 square meters. For fires outside high-rise buildings, detonation at a height of 6 meters above the fire source can achieve a water mist coverage area of ​​20 square meters. For small to medium-sized fires inside high-rise buildings, the height sensor can be replaced with a detonation control sensor. The extinguishing bomb can be dropped directly onto the fire source, or, under safe conditions, the bomb can be fixed at a certain height near the fire source (ideally on the rooftop) and detonated remotely, achieving a water mist coverage area of ​​20 square meters. Based on the extinguishing effect, multiple drops can be performed, achieving a fire extinguishing rate of up to 90%.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0045] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0048] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A large-volume emergency fire extinguishing water bomb deployed by a drone, comprising a projectile head, a projectile casing, and a projectile tail, wherein the upper end of the projectile casing is provided with an upper threaded interface, and the upper end of the projectile casing is connected to the projectile tail through the upper threaded interface; the lower end of the projectile casing is provided with a lower threaded interface, and the lower end of the projectile casing is connected to the projectile head through the lower threaded interface, characterized in that, It also includes fins, a liquid-filled baffle, a central propellant groove, and a central propellant grain. The fins are disposed at the upper end of the tail of the projectile. The fins include a first fin, a second fin, a third fin, and a fourth fin, and the first fin, the second fin, the third fin, and the fourth fin are arranged perpendicularly to each other at 90°. The liquid-filled baffle includes a first liquid-filled baffle and a second liquid-filled baffle arranged in parallel. The first liquid-filled baffle is disposed at the connection between the tail of the projectile and the projectile shell. The second liquid-filled baffle is disposed at the front half of the projectile shell. The central propellant groove is disposed inside the projectile shell, with the top end of the central propellant groove located inside the tail of the projectile and the bottom end of the central propellant groove located inside the projectile head. The central propellant grain is disposed inside the central propellant groove. The tip of the projectile is provided with a liquid filling port, and a liquid filling port piston is provided at the liquid filling port. The liquid filling port piston is connected to the liquid filling port with an interference fit. The projectile is provided with a liquid-blocking gasket, which is located at the front half of the projectile and is fixedly connected to the periphery of the projectile by waterproof adhesive. The liquid-filling partition is provided with a circular opening, which includes a first circular opening, a second circular opening, a third circular opening and a fourth circular opening. The first circular opening and the second circular opening are provided on the first liquid-filling partition, and the third circular opening and the fourth circular opening are provided on the second liquid-filling partition.

2. The large-volume emergency fire extinguishing water bomb deployed by a drone as described in claim 1, characterized in that, The tail of the projectile is equipped with a stabilizer, which is a square-frame stabilizer made of thin steel plate.

3. The large-volume emergency fire extinguishing water bomb deployed by a drone as described in claim 1, characterized in that, The projectile casing includes an outer shell and an inner liner, both of which have a gradually decreasing inner diameter that tapers from the tail end to the nose end.

4. The large-volume emergency fire extinguishing water bomb deployed by a drone as described in claim 1, characterized in that, The central explosive charge consists of an No. 8 industrial electric detonator and a passivated RDX detonating cord with a charge of 30g / m. The outer side of the central explosive charge slot is waterproofed.

5. The large-volume emergency fire extinguishing water bomb deployed by a drone as described in claim 1, characterized in that, The warhead is oval-shaped, with a length of 1-2 times the projectile diameter and a generatrix length of 0.75 times the projectile diameter.

6. The large-volume emergency fire extinguishing water bomb deployed by a drone as described in claim 1, characterized in that, The tail of the projectile is conical, made of ABS engineering plastic with a thickness of 5mm-10mm and a length of 0.5-2 times the radius of the projectile shell.

7. A method for using large-volume emergency fire extinguishing water bombs deployed by a drone as described in claim 1, characterized in that, Includes the following steps: S10. One part of the projectile is pre-installed in advance while ensuring that the explosive charge is separated from the casing. At the same time, a pre-set sensor is selected according to the fire situation. The other part of the projectile is transported to the site and the number of units to be assembled is determined according to the fire situation. S20. Pour the prepared water-based fire extinguishing agent into the shell of the projectile, and at the same time seal the piston of the filling port. S30: The missile body is mounted on the drone, the drone flies above the fire point, and the main switch is remotely turned on. S40. For forest canopy fire extinguishing, detonate at a height of 8m-10m from the fire source.

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