Directional primary-secondary fire extinguishing bomb based on unmanned aerial vehicle

Abstract

The oriented child-mother fire extinguishing bomb comprises a shell, a plurality of containing cavities are formed in the shell, and child-mother fire extinguishing devices are arranged in the containing cavities; the child-mother fire extinguishing device comprises a launching cylinder, a mother shell is arranged in the launching cylinder, and meanwhile, a plurality of child shells are placed in the mother shell; a launching device is arranged at the position, close to the top plate, of the launching cylinder, a driving mechanism for driving the launching cylinder to turn over towards the outside of the containing cavity to open the shell is connected to the launching cylinder, a plurality of flame detectors are fixedly connected to the bottom of the bottom plate, and the flame detectors are in one-to-one correspondence with the child-mother fire extinguishing devices in number and used for detecting the position of a fire source. After the position of the fire source is detected, the driving mechanism is controlled to drive the launching cylinder to move outwards, and meanwhile the launching device is controlled to drive the launching cylinder to be pushed towards the fire source. The device has the effects that the child-mother fire extinguishing bombs can be accurately thrown to the fire source range, the fire extinguishing accuracy is improved, and the fire extinguishing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry powder fire extinguishing, in particular to a directional mother-daughter fire extinguishing bomb based on a UAV. BACKGROUND

[0002] At present, the fire fighting of forest fires and high-rise building fires is facing great challenges. Forest fires often have fierce and rapid spread, and the occurrence area is mostly in mountainous areas and other places with poor transportation. When a fire breaks out in a high-rise building in the city, the conventional fire truck has the problem of "not going in, not spreading out, not reaching". The traditional fire fighting means such as fire trucks and ladders are limited by terrain and height, and it is difficult to quickly reach the core area of the fire source.

[0003] The rapid development of UAV technology provides a new solution for fire fighting. The fire extinguishing device carried by the UAV at present is usually a single fire extinguishing bomb, which not only has a limited fire extinguishing range, but also cannot purposefully fight the fire, and cannot grade the fire fighting. The mother-daughter fire extinguishing bomb can be dropped by airplane air drop or cannon shooting, etc. After the mother bomb is exploded in the air, a plurality of daughter fire extinguishing bombs are released, and the daughter fire extinguishing bombs further spread the fire extinguishing agent through secondary explosion, which can spread the fire extinguishing agent to a large area of the fire field in a short time.

[0004] However, the traditional mother-daughter fire extinguishing bomb has a full-circumferential explosion direction, and the direction of the daughter bomb after explosion is not controlled, resulting in a low fire extinguishing rate for the target fire source. Therefore, it is an urgent problem to design a mother-daughter fire extinguishing bomb capable of directing the fire extinguishing agent to the fire range. SUMMARY

[0005] In order to accurately throw the mother-daughter fire extinguishing bomb to the fire range, the present application provides a directional mother-daughter fire extinguishing bomb based on a UAV.

[0006] The directional mother-daughter fire extinguishing bomb based on a UAV provided by the present application adopts the following technical scheme: A directional mother-daughter fire extinguishing bomb based on a UAV, comprising an outer shell, a plurality of accommodating cavities are formed in the outer shell, and a mother-daughter fire extinguishing device is arranged in each accommodating cavity; the mother-daughter fire extinguishing device comprises a launching barrel, a mother shell body is arranged in the launching barrel, the mother shell body contains dry powder used for fire extinguishing, and a plurality of daughter shell bodies are arranged in the mother shell body, and the daughter shell bodies contain dry powder used for fire extinguishing; a launching device is arranged at a position close to a top plate of the launching barrel, a driving mechanism for driving the launching barrel to flip and open the outer shell outward is connected to the launching barrel, a plurality of flame detectors are fixedly connected to the bottom of a bottom plate, the number of the flame detectors corresponds to the number of the mother-daughter fire extinguishing devices, and the flame detectors are used for detecting the position of a fire source. After the position of the fire source is detected, the driving mechanism is controlled to drive the launching barrel to move outward, and the launching device is controlled to drive the launching barrel to push out in the direction of the fire source.

[0007] By adopting the technical scheme, when a fire occurs, the unmanned aerial vehicle carrying the primary and secondary fire extinguishing bombs flies to the vicinity of the fire source, the fire source position and direction are detected in real time by the flame sensor, after the flame sensor detects the position of the fire source, the control driving mechanism pushes the launch tube corresponding to the flame sensor to overturn outward to the containing cavity, after the launch tube overturns outward to correspond to the position of the fire source, the launch device receives the signal of the flame sensor, after a delay for a period of time, the launch device drives the launch tube to fly out in the direction of the fire source, the mother shell explodes after flying to the vicinity of the fire source, the dry powder in the mother shell flies out and covers the fire source, after the primary shell flies out, the primary shell explodes after secondary splitting, the dry powder in the primary shell splashes in a larger range, the dry powder covers a larger range, and the position of the fire source can be accurately and effectively extinguished.

[0008] Optionally, the inner wall of the mother shell is provided with a plurality of split grooves, and a detonation tube is arranged at the middle portion of the mother shell and arranged in the axial direction of the mother shell, and the end of the detonation tube close to the bottom plate is provided with a second electronic igniter, and the second electronic igniter is controlled by the flame detector.

[0009] By adopting the technical scheme, when the flame detector detects the flame, the second electronic igniter receives the signal, delays for a specific time, ignites the detonation tube after the mother shell is launched in the direction of the fire source, and the split grooves facilitate the explosion of the mother shell under the thrust of the detonation tube, the dry powder in the mother shell is exploded by the detonation tube, and the thrust generated by the detonation tube flies the primary shell outward.

[0010] Optionally, a positioning column is arranged at the center position of the shell, a plurality of accommodation grooves are arranged on the outer side wall of the positioning column and correspond to the positions of the containing cavities, the driving mechanism comprises a lead screw rotatably connected to the accommodation grooves, the launch tube is hingedly connected to the positioning seat at the position close to the top plate, the positioning seat is slidably connected to the lead screw, a fixed seat is threadedly connected to the lead screw, a connecting rod is hingedly connected to the fixed seat, the end of the connecting rod away from the fixed seat is hingedly connected to the launch tube at the position close to the bottom plate, and a driving assembly for driving the rotation of the lead screw is connected to the shell, and the driving assembly is controlled by the flame detector.

[0011] By adopting the technical scheme, when the flame detector detects the position of the fire source, the driving assembly is controlled to drive the rotation of the lead screw, the fixed seat is driven to slide along the direction of the lead screw, the connecting rod pushes the launch tube to slide downward, and the connecting rod pushes the launch tube to overturn outward away from the positioning column, so that the launch tube can be controlled to overturn outward to the containing cavity.

[0012] Optionally, the driving assembly comprises an end of each screw rod extending out of the top plate and being slidingly connected with a connecting shaft, the connecting shaft and the inner wall of the screw rod are provided with key grooves, so that the connecting shaft can slide relative to the screw rod but cannot rotate, the connecting shaft is fixedly connected with a slave gear, each slave gear is rotatably connected with an iron block, the top of the shell is fixedly connected with a protective cylinder, the center of the protective cylinder is fixedly connected with a power motor, the output shaft of the power motor extends into the protective cylinder and is fixedly connected with a master gear, the master gear is used for meshing with the slave gear; the protective cylinder is uniformly fixedly connected with electromagnets at the outer periphery of the power motor, the number of the electromagnets corresponds to the number of the iron blocks and the flame detectors, and the electromagnets are controlled by the flame detectors.

[0013] By adopting the above technical scheme, when the user uses the device, after the flame detector detects the position of the fire source, the electromagnets are controlled to be powered on, the powered-on electromagnets adsorb the iron blocks, the iron blocks drive the connecting shaft and the slave gear to slide upward, so that the slave gear and the master gear mesh, at the same time, the power motor is controlled to rotate by the flame detector, the power motor drives the slave gear to rotate through the master gear, and then drives the screw rod to rotate, so that the fixed seat slides along the screw rod to the direction of the bottom plate, the connecting rod pushes the launching cylinder to slide to the direction of the bottom plate, and at the same time, the connecting rod pushes the launching cylinder to flip outward away from the positioning column, so that the protective cover is opened.

[0014] Optionally, the launching device comprises a cavity opened in the end of the launching cylinder, the cavity is fixedly connected with a storage cylinder, the inner diameter of the storage cylinder is smaller than the inner diameter of the launching cylinder, so that the inner wall of the storage cylinder and the launching cylinder forms a launching chamber, the side wall of the storage cylinder is provided with a through hole, the storage cylinder contains gunpowder, and the storage cylinder is provided with a first electronic igniter, the first electronic igniter is controlled by the flame detector.

[0015] By adopting the above technical scheme, when the user uses the device, after the first electronic igniter receives the signal emitted by the flame detector, the first electronic igniter ignites the gunpowder, the gunpowder burns to generate a large amount of gas (such as nitrogen, carbon dioxide, etc.) and heat, and the gas and heat rapidly expand in the launching chamber to form a thrust force, which pushes the launching cylinder to fly to the direction of the target fire source.

[0016] Optionally, all the sub-housings are connected by a glass fiber net to form a fire extinguishing net for covering the fire source, the glass fiber net is connected with a metal lead wire, and the metal lead wire is connected with the detonating tube.

[0017] By adopting the above technical scheme, when the user uses the device, after the detonating tube is exploded, the fire source generated by the second electronic igniter can ignite the metal lead wire, when the glass fiber net flies to the position of the fire source, the metal lead wire can ignite the sub-housing, so that the dry powder in the sub-housing is exploded, and after the powder in the sub-housing is exploded, the powder falls on the surface of the combustible material to form a covering film to isolate oxygen and extinguish the fire.

[0018] Optionally, the end of the glass fiber net is provided with a plurality of counterweights.

[0019] By adopting the above technical scheme, when the user uses it, the counterweight can increase the weight of the fireproof net after the sub-shell is blown open by the thrust of the detonation tube, so that it is more stable in an environment with strong wind, and the shaking caused by the wind force is reduced, thereby enhancing the wind resistance. At the same time, the counterweight makes the protective net stably cover the position of the fire source, and after the sub-shell is blown open, the powder in the sub-shell can accurately cover the fire source, thereby improving the accuracy and efficiency of fire extinguishing.

[0020] Optionally, the top of the shell is rotatably connected with a mounting plate, the mounting plate is provided with bolt holes for fixing the mounting plate and the unmanned aerial vehicle, the mounting plate is fixedly connected with a driving motor, and the output shaft of the driving motor is fixed to the shell.

[0021] By adopting the above technical scheme, when the user uses it, after determining the position of the fire source, the launching tube closest to the fire source shoots the sub-shell and the mother shell, and then the driving motor works to rotate the sub-mother fire extinguishing device in the other accommodating cavity to the position corresponding to the fire source, trigger the corresponding flame detector, and control the mother shell and the sub-shell in the second accommodating cavity to fly out to the fire source, so that the fire source is extinguished more thoroughly.

[0022] Optionally, the shell is inserted with a protective cover on the side of the accommodating cavity away from the positioning column.

[0023] By adopting the above technical scheme, when the user uses it, the protective cover makes the accommodating cavity form a closed space, so as to prevent impurities or bad weather from damaging the sub-mother fire extinguishing device.

[0024] In summary, the present application has at least one of the following beneficial technical effects: 1. A mother shell is arranged in a launching barrel, the mother shell contains dry powder for extinguishing fire, and a plurality of child shells are arranged in the mother shell, the child shells contain dry powder for extinguishing fire; a launching device is arranged at a position close to a top plate of the launching barrel, a driving mechanism for driving the launching barrel to flip and open the outer shell outside the accommodating cavity is connected to the launching barrel, a plurality of flame detectors are fixedly connected to the bottom of the bottom plate, the number of the flame detectors corresponds to the number of the mother-child fire extinguishing device, the flame detectors are used for detecting the position of the fire source, after detecting the position of the fire source, the driving mechanism is controlled to drive the launching barrel to move outward, and the launching device is controlled to drive the launching barrel to push out in the direction of the fire source, the flame sensor detects the position and direction of the fire source in real time, the driving mechanism is controlled to push the launching barrel corresponding to the flame sensor to flip outside the accommodating cavity, when the launching barrel flips outward to correspond to the position of the fire source, the launching device receives the signal of the flame sensor, after a delay for a period of time, the launching device is controlled to drive the launching barrel to fly out in the direction of the fire source, the mother shell flies to the vicinity of the fire source and explodes, the dry powder in the mother shell flies out and covers the fire source, after the child shell flies out, it is secondarily split and explodes, the dry powder in the child shell splashes in a larger range, the dry powder covers a larger range, and the position of the fire source can be accurately and effectively extinguished. 2. A glass fiber net is connected between all the child shells to form a fire extinguishing net for covering the fire source, a metal lead is connected to the glass fiber net, the metal lead is connected to the detonating tube, and a plurality of counterweights are arranged at the end of the glass fiber net; after the detonating tube explodes, the fire source generated by the second electronic igniter can ignite the metal lead, when the glass fiber net flies to the position of the fire source, the metal lead can ignite the child shell, after the child shell explodes under the thrust of the detonating tube, the counterweights can increase the weight of the fireproof net, so that the fireproof net is more stable in an environment with relatively large wind force, the counterweights enable the protective net to stably cover the position of the fire source, after the child shell explodes, the powder in the child shell can accurately cover the fire source, the accuracy and efficiency of extinguishing the fire are improved, the dry powder in the child shell explodes, and after the powder in the child shell explodes, it falls on the surface of the combustible material to form a covering film to isolate oxygen and extinguish the fire. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application; Figure 2 is a sectional view of the embodiment of the application; Figure 3 is an explosion diagram for highlighting the mother-child fire extinguishing bomb; Figure 4 is Figure 2 is an enlarged view of part A of Figure 5 is an enlarged view of part B of Figure 2 Figure 6 is a schematic diagram of the structure of the bottom plate; ​Figure 7 is a structural diagram of the glass fiber net and the sub-shell.

[0026] Explanation of reference numerals: 1, housing; 11, positioning column; 111, let go slot; 12, bottom plate; 121, notch slot; 122, baffle; 13, top plate; 14, partition plate; 15, accommodating cavity; 16, protective cover; 17, flame detector; 18, protective cylinder; 19, mounting plate; 191, driving motor; 2, sub-mother fire extinguishing bomb; 21, launching cylinder; 211, cavity; 22, mother shell; 221, desired slot; 222, detonating tube; 223, second electronic igniter; 23, sub-shell; 231, glass fiber net; 232, counterweight; 3, launching device; 31, storage cylinder; 32, launching cavity; 33, first electronic igniter; 34, connecting plate; 4, driving mechanism; 41, lead screw; 42, positioning seat; 43, fixing seat; 44, connecting rod; 45, connecting shaft; 46, from gear; 461, iron block; 47, power motor; 471, main gear; 48, electromagnet. DETAILED DESCRIPTION

[0027] The following description will be made in conjunction with the accompanying drawings. Figures 1-7 The application is further described in detail.

[0028] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "linking", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, or communication; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements, or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The embodiment of the present application discloses a directional sub-mother fire extinguishing bomb based on a unmanned aerial vehicle, referring to Figure 1 and Figure 2, including a shell 1, the shell 1 is cylindrical, the shell 1 includes a positioning column 11, the positioning column 11 is connected with a bottom plate 12 and a top plate 13 at both ends respectively, the outer side wall of the positioning column 11 is provided with a plurality of partitions 14, the partitions 14 are distributed along the circumference of the positioning column 11 at equal intervals, the length direction of the partition 14 is arranged along the axial direction of the positioning shaft, and the figure shows that the partition 14 is six, but is not limited to six. Adjacent partitions 14, bottom plate 12 and top plate 13 form a containing cavity 15, the containing cavity 15 is used for placing a primary and secondary fire extinguishing bomb 2; the protective cover 16 is inserted between adjacent partitions 14, the two sides of the protective cover 16 abut against the inner wall of the partition 14, so that the containing cavity 15 forms a closed space, preventing external impurities or bad weather from causing damage to the primary and secondary fire extinguishing bomb.

[0031] With reference to Figure 2 and Figure 3 , the primary and secondary fire extinguishing device 2 includes a launching barrel 21, the launching barrel 21 is provided with a mother shell 22, the mother shell 22 is arranged in a cylindrical shape, the mother shell 22 is filled with dry powder for extinguishing fire, and a plurality of child shells 23 are placed in the mother shell 22, the child shells 23 are filled with dry powder for extinguishing fire; the launching barrel 21 is provided with a launching device 3 near the top plate 13, the launching barrel 21 is connected with a driving mechanism 4 for driving the launching barrel 21 to outwardly overturn and prop open the protective cover 16, a plurality of flame detectors 17 are fixedly connected to the bottom of the bottom plate 12, the number of the flame detectors 17 corresponds to the number of the primary and secondary fire extinguishing device 2, when the flame detector 17 detects a flame signal, the driving mechanism 4 is controlled to drive the launching barrel 21 to move outwardly, and the launching device 3 is controlled to drive the launching barrel 21 to push out in the direction of the fire source, so that the mother shell 22 and the child shell 23 fly in the direction of the fire source, and the dry powder in the mother shell 22 and the child shell 23 explodes near the fire source, accurately extinguishing the fire source.

[0032] With reference to Figure 2 , Figure 3 and Figure 4The outer side wall of the positioning column 11 is provided with a plurality of accommodation grooves 111, the driving mechanism 4 comprises a lead screw 41 rotatably connected in the accommodation grooves 111, the launching barrel 21 is hingedly connected with a positioning seat 42 near the top plate 13, the positioning seat 42 is slidably connected on the lead screw 41, a fixing seat 43 is threadedly connected on the lead screw 41, a connecting rod 44 is hingedly connected on the fixing seat 43, and the end of the connecting rod 44 away from the fixing seat 43 is hingedly connected to the launching barrel 21 near the bottom plate 12; the end of each lead screw 41 extends out of the top plate 13 and is slidably connected with a connecting shaft 45, the connecting shaft 45 and the inner wall of the lead screw 41 are provided with key grooves, so that the connecting shaft 45 can slide relative to the lead screw 41 but cannot rotate, a pinion 46 is fixedly connected on the connecting shaft 45, an iron block 461 is rotatably connected on each pinion 46, a protective cylinder 18 is fixedly connected on the top of the shell 1, a power motor 47 is fixedly connected in the center of the protective cylinder 18, the output shaft of the power motor 47 extends into the protective cylinder 18 and is fixedly connected with a main gear 471, the main gear 471 is used for meshing with the pinion 46; the electromagnetic iron 48 is uniformly fixedly connected on the outer periphery of the power motor 47, the number of the electromagnetic iron 48 is one-to-one corresponding to the number of the iron block 461 and the flame detector 17, and the electromagnetic iron 48 is controlled by the flame detector 17.

[0033] When the flame detector 17 detects the position of the fire source, the electromagnetic iron 48 is controlled to be powered on, the powered-on electromagnetic iron 48 adsorbs the iron block 461, the iron block 461 drives the connecting shaft 45 and the pinion 46 to slide upwards, so that the pinion 46 and the main gear 471 mesh, at the same time, the power motor 47 is controlled to rotate by the flame detector 17, the power motor 47 drives the pinion 46 to rotate through the main gear 471, and then drives the lead screw 41 to rotate, drives the fixing seat 43 to slide along the lead screw 41 to the direction of the bottom plate 12, drives the connecting rod 44 to slide the launching barrel 21 to the direction of the bottom plate 12, and at the same time, the connecting rod 44 drives the launching barrel 21 to flip outwardly to the direction away from the positioning column 11, and the protective cover 16 is opened.

[0034] Referring to Figure 2 , Figure 3 and Figure 5The launching device 3 comprises a cavity 211 formed in the end of the launching barrel 21, and a storage barrel 31 is fixedly connected in the cavity 211. The storage barrel 31 is coaxially arranged with the launching barrel 21, the inner diameter of the storage barrel 31 is smaller than the inner diameter of the launching barrel 21, so that the inner wall of the storage barrel 31 and the launching barrel 21 forms a launching cavity 32. The side wall of the storage barrel 31 is provided with a through hole, and the storage barrel 31 is filled with gunpowder. A first electronic igniter 33 is arranged in the storage barrel 31, and the first electronic igniter 33 is controlled by the flame detector 17. A plurality of connecting plates 34 are fixedly connected to the storage barrel 31, and the connecting plates 34 are distributed radially along the outer side wall of the storage barrel 31. The connecting plates 34 are fixedly connected to the inner wall of the launching barrel 21 away from the storage barrel 31, and the connecting plates 34 are used to fix the storage barrel 31 and the launching barrel 21. After receiving the signal emitted by the flame detector 17, the first electronic igniter 33 ignites the gunpowder, and the gunpowder combustion produces a large amount of gas (such as nitrogen, carbon dioxide, etc.) and heat. The gas and heat rapidly expand in the launching cavity 32 to form a thrust force, which pushes the launching barrel 21 to fly towards the target fire source.

[0035] The inner wall of the female shell 22 is provided with a plurality of slits 221 arranged along the axial direction of the female shell 22. A detonation tube 222 is arranged in the middle of the female shell 22 and arranged along the axial direction of the female shell 22. The end of the detonation tube 222 close to the bottom plate 12 is provided with a second electronic igniter 223 controlled by the flame detector 17. When the flame detector 17 detects the flame, it emits a signal to the second electronic igniter 223. After receiving the information, the second electronic igniter 223 delays for a certain time. When the female shell 22 is launched towards the fire source, the second electronic igniter 223 ignites the detonation tube 222, which explodes the dry powder in the female shell 22, and at the same time, the thrust force generated by the detonation tube 222 pushes the male shell 23 outwards. The dry powder can be ammonium phosphate salt, which can be used to extinguish class A, B and C fires, i.e. fires caused by flammable objects, flammable liquids and gases. The principle of fire extinguishing is that the powder is exploded and falls on the surface of the flammable object to form a covering film to isolate oxygen and extinguish the fire.

[0036] Referring to Figure 6 The bottom plate 12 is provided with a notch groove 121 corresponding to the position of each accommodating cavity 15, and a baffle 122 is inserted into the notch groove 121. The baffle 122 is inserted between the bottom plate 12, which facilitates the launching barrel 21 to push open the baffle 122. The baffle 122 closes the bottom of the accommodating cavity 15 to prevent the dry powder in the male shell 23 and the female shell 22 from being damp and becoming a dud.

[0037] Referring to Figure 7The glass fiber net 231 is connected with metal lead wires, and the fire source generated by the second electronic igniter 223 can ignite the metal lead wires after the booster 222 is exploded. When the glass fiber net 231 flies to the position of the fire source, the metal lead wires can ignite the sub-housing 23, so that the dry powder in the sub-housing 23 is exploded. After the dry powder in the sub-housing 23 is exploded, the dry powder falls on the surface of the combustible material to form a covering film, so as to isolate oxygen and extinguish the fire. The end of the glass fiber net 231 is provided with a plurality of counterweights 232. The counterweights 232 can increase the weight of the fireproof net, so that the fireproof net is more stable in the environment with large wind force, the shaking caused by the wind force is reduced, and the wind resistance is enhanced. Meanwhile, the counterweights 232 can make the fireproof net stably cover the position of the fire source. After the sub-housing 23 is exploded, the dry powder in the sub-housing 23 can accurately cover the fire source, so as to improve the accuracy and efficiency of extinguishing the fire.

[0038] Looking back Figure 1 The top of the shell 1 is rotationally connected with a mounting plate 19, the mounting plate 19 is provided with bolt holes, so as to facilitate the fixing of the mounting plate 19 and the unmanned aerial vehicle. The mounting plate 19 is fixedly connected with a driving motor 191, the driving motor 191 is a stepping motor, and the output shaft of the driving motor 191 is fixed with the shell. After the position of the fire source is determined, the sub-housing 23 and the mother housing 22 in the closest launching cylinder 21 to the fire source are shot out, the driving motor 191 works to rotate the sub-mother fire extinguishing device 2 in the other accommodating cavity 15 to the position corresponding to the fire source, triggers the corresponding flame detector 17, and controls the mother housing 22 and the sub-housing 23 in the other accommodating cavity 15 to fly to the fire source, so as to more completely extinguish the fire source.

[0039] The implementation principle of the directional sub-mother fire extinguishing bomb based on the unmanned aerial vehicle is as follows: after a fire occurs, the unmanned aerial vehicle is controlled to fly to the vicinity of the fire; after the fire source position is detected by the flame detector 17, the electromagnet 48 is powered on, the electromagnet 48 after being powered on absorbs the iron block 461, the iron block 461 drives the connecting shaft 45 and the slave gear 46 to slide upwards, so that the slave gear 46 and the main gear 471 are engaged, at the same time, the flame detector 17 controls the power motor 47 to rotate, the power motor 47 drives the slave gear 46 to rotate through the main gear 471, and then drives the lead screw 41 to rotate, drives the fixed seat 43 to slide along the lead screw 41 to the direction of the bottom plate 12, so that the connecting rod 44 pushes the launching barrel 21 to slide to the direction of the bottom plate 12, and at the same time, the connecting rod 44 pushes the launching barrel 21 to flip outward away from the positioning column 11, and the protective cover 16 is pushed open; after the launching barrel 21 pushes open the protective cover 16, the flame detector 17 sends information to the first electronic igniter 33 after a delay, the first electronic igniter 33 ignites the gunpowder, the gunpowder burns to generate a large amount of gas (such as nitrogen, carbon dioxide, etc.) and heat, the gas and heat rapidly expand in the launching chamber 32 to form a thrust force, which pushes the launching barrel 21 to fly to the direction of the target fire source; at the same time, the flame detector 17 sends a signal to the second electronic igniter 223, after receiving the information, the second electronic igniter 223 delays for a specific time, when the mother shell 22 is launched to the direction of the fire source, the second electronic igniter 223 ignites the booster tube 222, the booster tube 222 explodes the mother shell 22, the dry powder in the mother shell 22 falls on the surface of the combustible material, and at the same time, the booster tube 222 generates a thrust force to fly the child shell 23 outward. The child shell 23 and the glass fiber net 231 fly to the direction of the fire source under the action of the thrust force of the booster tube 222, when the glass fiber net 231 flies to the position of the fire source, the metal lead can ignite the child shell 23, so that the dry powder in the child shell 23 explodes, and the powder in the child shell 23 falls on the surface of the combustible material after exploding, to form a covering film to isolate oxygen and extinguish the fire.

[0040] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An unmanned aerial vehicle-based directional sub-mother fire extinguishing bomb, characterized in that: it comprises a shell (1), a plurality of accommodating cavities (15) are formed in the shell (1), and a sub-mother fire extinguishing device (2) is arranged in the accommodating cavities (15); the sub-mother fire extinguishing device (2) comprises a launching barrel (21), a mother shell body (22) is arranged in the launching barrel (21), the mother shell body (22) contains dry powder used for fire extinguishing, and a plurality of sub-shell bodies (23) are arranged in the mother shell body (22), and the sub-shell bodies (23) contain dry powder used for fire extinguishing; the launching barrel (21) is provided with a launching device (3) close to a top plate (13), the launching barrel (21) is connected with a driving mechanism (4) for driving the launching barrel (21) to be turned and opened outward to support the shell (1), a plurality of flame detectors (17) are fixedly connected to the bottom of a bottom plate (12), the flame detectors (17) correspond to the number of the sub-mother fire extinguishing device (2), the flame detectors (17) are used for detecting the position of a fire source, after the position of the fire source is detected, the driving mechanism (4) is controlled to drive the launching barrel (21) to move outward, and the launching device (3) is controlled to drive the launching barrel (21) to be pushed out in the direction of the fire source. A plurality of split grooves (221) are formed in the inner wall of the mother shell body (22); a detonating tube (222) is arranged at the middle of the mother shell body (22), the detonating tube (222) is arranged in the axial direction of the mother shell body (22), a second electronic igniter (223) is arranged at one end of the detonating tube (222) close to the bottom plate (12), and the second electronic igniter (223) is controlled by the flame detector (17). A positioning column (11) is arranged at the center of the shell body, and a plurality of accommodation grooves (111) are formed in the outer side wall of the positioning column (11) and correspond to the positions of the accommodating cavities (15); the driving mechanism (4) comprises a lead screw (41) rotatably connected in the accommodation groove (111), the launching barrel (21) is hingedly connected to a positioning seat (42) close to the top plate (13), the positioning seat (42) is slidably connected to the lead screw (41), a fixed seat (43) is threadedly connected to the lead screw (41), a connecting rod (44) is hingedly connected to the fixed seat (43), one end of the connecting rod (44) away from the fixed seat (43) is hingedly connected to the launching barrel (21) close to the bottom plate (12), a driving assembly for driving the lead screw (41) to rotate is connected to the shell (1), and the driving assembly is controlled by the flame detector (17).

2. The drone-based directional sub-munition fire extinguishing projectile of claim 1, wherein: ​ 3. The drone-based directional sub-munition fire extinguishing projectile of claim 1, wherein: ​ ​ 4. The drone-based directional sub-munition fire extinguishing projectile of claim 3, wherein: The driving assembly comprises an end of each screw rod (41) extending out of the top plate (13) and being slidably connected with a connecting shaft (45), the connecting shaft (45) and the inner wall of the screw rod (41) are provided with key grooves, so that the connecting shaft (45) can slide relative to the screw rod (41) but cannot rotate, a slave gear (46) is fixedly connected on the connecting shaft (45), each slave gear (46) is rotatably connected with an iron block (461), the top of the shell (1) is fixedly connected with a protective cylinder (18), the center of the protective cylinder (18) is fixedly connected with a power motor (47), the output shaft of the power motor (47) extends into the protective cylinder (18) and is fixedly connected with a main gear (471), the main gear (471) is used for meshing with the slave gear (46), the protective cylinder (18) is uniformly fixedly connected with electromagnets (48) at the outer periphery of the power motor (47), the number of the electromagnets (48) is one-to-one corresponding to the number of the iron blocks (461) and the flame detectors (17), and the electromagnets (48) are controlled by the flame detectors (17).

5. The drone-based directional sub-munition fire extinguishing projectile of claim 1, wherein: The launching device (3) comprises a cavity (211) formed in the end of the launching cylinder (21), a storage cylinder (31) is fixedly connected in the cavity (211), the inner diameter of the storage cylinder (31) is smaller than the inner diameter of the launching cylinder (21), so that the inner wall of the storage cylinder (31) and the launching cylinder (21) forms a launching cavity (32), the side wall of the storage cylinder (31) is provided with a through hole, the storage cylinder (31) is filled with gunpowder, and a first electronic igniter (33) is arranged in the storage cylinder (31), and the first electronic igniter (33) is controlled by the flame detector (17).

6. The drone-based directional sub-munition fire extinguishing projectile of claim 1, wherein: The sub-housings (23) are connected by a glass fiber net (231) to form a fire extinguishing net for covering the fire source, the glass fiber net (231) is connected with metal leads, and the metal leads are connected with the detonating tubes (222).

7. The drone-based directional sub-munition fire extinguishing projectile of claim 6, wherein: The end of the glass fiber net (231) is provided with a plurality of counterweights (232).

8. The drone-based directional sub-munition fire extinguishing projectile of claim 1, wherein: The top of the shell (1) is rotatably connected with a mounting plate (19), the mounting plate (19) is provided with bolt holes for fixing the mounting plate (19) and the unmanned aerial vehicle, and the mounting plate (19) is fixedly connected with a driving motor (191), and the output shaft of the driving motor (191) is fixed with the shell (1).

9. The drone-based directional sub-munition fire extinguishing projectile of claim 1, wherein: The shell (1) is inserted with a protective cover (16) away from the positioning column (11) on the side of the containing cavity (15).

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