Aviation fire extinguishing bomb for forest steppe fire

Abstract

The utility model discloses an aviation fire extinguishing bomb for forest and grassland fire disasters. The aviation fire extinguishing bomb for forest and grassland fire disasters comprises a shell and an empennage, the shell is provided with a first end and a second end opposite to the first end, and a detonation assembly is arranged in the shell; the empennage is arranged at the second end, the empennage comprises a center column and fins, one end of the center column is connected with the second end, the fins are evenly distributed in the circumferential direction of the center column, and the sides, away from the center column, of the fins are provided with wind resistance weakening parts; and the distance from the wind resistance weakening part to the central column is gradually reduced from the direction far away from the second end to the direction close to the second end.

Description

Technical Field

[0001] The present application relates to the technical field of forest and grassland fire prevention and control, and more specifically, to an aerial fire extinguishing bomb for forest and grassland fires. Background Art

[0002] Forest and grassland fires start quickly, burn a large area, and are extremely difficult to extinguish, making them a global problem.

[0003] At present, most of the equipment in this field is small-scale, with a small amount of suppressant, high waste-to-effectiveness ratio, and small coverage area, which makes it difficult to effectively control forest and grassland fires in actual combat. The key to the success of firefighting lies in whether enough fire suppressant can be accurately delivered and dispersed over a large area over the fire area.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0005] One purpose of the present application is to provide a new technical solution for aerial fire extinguishing bombs for forest and grassland fires.

[0006] According to one aspect of the present application, an aerial fire-extinguishing bomb for forest and grassland fires is provided. The aerial fire-extinguishing bomb for forest and grassland fires comprises a shell and a tail; the shell has a first end and a second end arranged opposite to the first end, and a detonation assembly is arranged in the shell; the tail is arranged at the second end, wherein the tail comprises a central column and fins, one end of the central column is connected to the second end, a plurality of fins are evenly arranged along the circumferential direction of the central column, and a wind resistance weakening portion is provided on the side of the fin away from the central column, and the distance of the wind resistance weakening portion from the central column gradually decreases from the direction away from the second end to the direction close to the second end.

[0007] Optionally, a center tube is provided in the shell, and the center tube is arranged along the axial direction of the shell, one end of the center tube extends out of the first end, and the other end of the center tube extends out of the second end, and the end of the center tube extending out of the second end is connected to the end of the center column; wherein the detonation assembly is arranged in the center tube.

[0008] Optionally, the shell has a containing cavity, the containing cavity is filled with an inhibitor, and the central tube penetrates the containing cavity along the axial direction of the shell.

[0009] Optionally, a first screw plug is embedded in the end of the central tube close to the first end, a second screw plug is embedded in the end of the central tube close to the second end, and the tail wing is arranged at the second end by being located at the second screw plug.

[0010] Optionally, the aerial fire extinguishing bomb for forest and grassland fires further includes a protective cap, which is arranged at the end of the central tube close to the first end, and the protective cap is connected to the first plug.

[0011] Optionally, the detonation assembly is arranged in the central tube. The detonation assembly includes a delay and altitude-determining initiation system, an ignition head, and pyrotechnic composition. The delay and altitude-determining initiation system, the ignition head, and the pyrotechnic composition are arranged in sequence along the axial direction of the housing.

[0012] Optionally, a filling port is formed on the housing, and the filling port communicates with the accommodating cavity.

[0013] Optionally, the aerial fire extinguishing bomb for forest and grassland fires further includes a sealing cover, and the sealing cover is connected to the filling port.

[0014] Optionally, a bomb suspension hoop is arranged on the housing, and a pin shaft is arranged on the bomb suspension hoop. The pin shaft is matched with a decoupler of the flight equipment.

[0015] Optionally, a plurality of the bomb suspension hoops are arranged on the housing, and the plurality of bomb suspension hoops are arranged along the axial direction of the housing.

[0016] In the embodiment of the present application, the aerial fire extinguishing bomb is carried by the flight equipment above the forest and grassland fires that cannot be reached due to terrain, fire intensity, etc. During the landing process of the aerial fire extinguishing bomb, by setting one side of the vane close to the second end to a tapered converging shape, it is beneficial to cut the airflow through the vane during the landing process, reduce the wind resistance while maintaining a stable landing attitude of the aerial fire extinguishing bomb, avoid the aerial fire extinguishing bomb deviating from the preset dropping point, achieve precise dropping, and then the housing is exploded through the detonation assembly so that the inhibitor is scattered above the fire site, effectively improving the fire extinguishing efficiency.

[0017] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1 is a schematic structural diagram of the aerial fire extinguishing bomb in the embodiment of the present application;

[0020] Figure 2 is Figure 1 an enlarged schematic diagram of part A1 in;

[0021] Figure 3 is Figure 1 an enlarged schematic diagram of part A2 in.

[0022] Description of the reference numerals:

[0023] 1 - housing; 11 - first end; 12 - second end; 13 - accommodation cavity; 14 - filling port; 15 - bomb suspension hoop; 151 - pin shaft;

[0024] 2 - central tube; 21 - first plug; 22 - second plug;

[0025] 3 - detonation assembly; 31 - delay and altitude - fixed detonation system; 32 - ignition head; 33 - pyrotechnic composition;

[0026] 4 - fin; 41 - central column; 42 - fin blade; 421 - drag reduction part;

[0027] 5 - sealing cover;

[0028] 6 - protective cap. Detailed implementation manners

[0029] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present application or its application or use.

[0031] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0032] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] According to an embodiment of the present application, an aerial fire extinguishing bomb for forest and grassland fires is provided. The aerial fire extinguishing bomb includes a housing 1 and a tail fin 4. The housing 1 has a first end 11 and a second end 12 disposed opposite to the first end 11. An explosion initiation assembly 3 is provided inside the housing 1. The tail fin 4 is disposed at the second end 12. Wherein, the tail fin 4 includes a central column 41 and fin blades 42. One end of the central column 41 is connected to the second end 12. A plurality of the fin blades 42 are uniformly arranged along the circumferential direction of the central column 41. A wind resistance weakening portion 421 is provided on a side of the fin blade 42 facing away from the central column 41. The dimension of the wind resistance weakening portion 421 away from the central column 41 gradually decreases in a direction from far away from the second end 12 to close to the second end 12.

[0035] As Figures 1 to 3 shown, the housing 1 is a columnar housing 1. The first end 11 of the housing 1 is the windward side. The first end 11 is in an arched spherical shape, which can not only reduce the influence of air resistance on the landing attitude of the aerial fire extinguishing bomb, but also effectively increase the capacity of the housing 1 to store more inhibitors. The second end 12 of the housing 1 is in a frustum shape.

[0036] Of course, in the embodiment of the present application, the housing 1 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the first end 11 can also be conical, and the second end 12 can also be in an arched spherical shape.

[0037] As Figures 1 to 3 shown, an explosion initiation assembly 3 is provided inside the housing 1. The explosion initiation assembly 3 is used to ignite or detonate the housing 1 so that the inhibitor stored in the housing 1 is scattered for fire extinguishing.

[0038] As Figures 1 to 3 shown, the second end 12 of the housing 1 is in a frustum shape. One end of the tail fin 4 is connected to the second end 12. By providing the tail fin 4 at the second end 12 of the housing 1, the attitude of the aerial fire extinguishing bomb can be stabilized by using the tail fin 4, preventing the aerial fire extinguishing bomb from deviating from the dropping point during the landing process, and effectively improving the dropping accuracy.

[0039] The tail fin 4 includes a central column 41 and fin blades 42. One end of the central column 41 is connected to the second end 12.

[0040] As Figures 1 to 3 shown, the axial direction of the central column 41 is consistent with the axial direction of the housing 1, and the circumferential direction of the central column 41 is consistent with the circumferential direction of the housing 1.

[0041] As Figures 1 to 3As shown, the inner wall of one end of the central column 41 has internal threads, and the central column 41 is connected to the second end 12 of the housing 1 through these internal threads. The central column 41 is threadedly connected to the housing 1 to fix the connection strength between the tail fins 4 and the housing 1, and plays a role in stabilizing the attitude of the aerial fire extinguishing bomb.

[0042] Of course, in the embodiment of the present application, the central column 41 and the housing 1 are not limited to the above structure, and those skilled in the art can set them according to actual needs. For example, the central column 41 and the second end 12 of the housing 1 can also be connected and fixed by welding or interference fit, etc.

[0043] The fin 42 is fixed to the central column 41 by welding or assembly. For example, the fin 42 is fixed to the central column 41 by means such as plugging or fasteners.

[0044] As Figures 1 to 3 shown, the fin 42 is provided with four to six pieces, and a plurality of fins 42 are evenly arranged along the circumferential direction of the central column 41. Using the principle of aerodynamics, the fire extinguishing bomb is always kept in a fixed attitude during landing, which is beneficial to accurately controlling the detonation height and the shape of the inhibitor spraying.

[0045] One side of the fin 42 facing away from the central column 41 has a wind resistance weakening portion 421, and the dimension of the wind resistance weakening portion 421 from the central column 41 gradually decreases in the direction from far away from the second end 12 to close to the second end 12.

[0046] That is to say, the side of the fin 42 close to the second end is in a tapered converging shape. By setting the windward surface of the fin 42 as an inclined side, the wind resistance of the aerial fire extinguishing bomb during landing can be reduced, so as to stabilize the landing attitude of the aerial fire extinguishing bomb and achieve accurate delivery.

[0047] Of course, in the embodiment of the present application, the wind resistance weakening portion 421 of the fin 42 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the wind resistance weakening portion 421 of the fin 42 can be linear, or can be streamline or arched, etc.

[0048] In the embodiment of the present application, the aerial fire extinguishing bomb is carried by a flying device above a forest and grassland fire that cannot be reached due to terrain, fire, etc. During the landing process of the aerial fire extinguishing bomb, the arched spherical structure of the first end 11 can not only effectively reduce the air resistance, but also effectively increase the storage space of the accommodation cavity 13 and increase the storage capacity of the inhibitor. By setting the side of the fin 42 close to the second end 12 as a tapered converging shape, it is beneficial to cut the air flow through the fin 42 during the landing process, reduce the wind resistance while maintaining the stable landing attitude of the aerial fire extinguishing bomb, avoid the aerial fire extinguishing bomb deviating from the preset delivery point, achieve accurate delivery, and then the housing 1 is exploded by the ignition assembly 3 so that the inhibitor is sprayed above the fire field, effectively improving the fire extinguishing efficiency.

[0049] In one example, a central tube 2 is provided inside the housing 1. The central tube 2 is arranged along the axial direction of the housing 1. One end of the central tube 2 extends out of the first end 11, and the other end of the central tube 2 extends out of the second end 12. The end of the central tube 2 extending out of the second end 12 is connected to the end of the central column 41. Wherein, the detonation assembly 3 is arranged inside the central tube 2.

[0050] As Figures 1 to 3 shown, the central tube 2 can be an independent entity. The central tube 2 is a hollow tube with internal threads on the inner walls at both ends and external threads on the outer walls at both ends.

[0051] One end of the central tube 2 passes through the first end 11 of the housing 1, and the other end of the central tube 2 passes through the second end 12 of the housing 1. This hollow tube is arranged along the axial direction of the housing 1. That is to say, this hollow tube is vertically placed inside the housing 1, that is, the axial direction of the central tube 2 is the same as the axial direction of the housing 1.

[0052] The opposite ends of the central tube 2 are fixed to the housing 1 by compression screws.

[0053] One end of the central tube 2 extends out of the first end 11. A front compression screw is arranged at the first end 11 of the housing 1. The front compression screw is threadedly connected to the end of the central tube 2 extending out of the first end 11 to fix the connection between one end of the central tube 2 and the first end 11 of the housing 1.

[0054] The other end of the central tube 2 extends out of the second end 12. A rear compression screw is arranged at the second end 12 of the housing 1. The rear compression screw is threadedly connected to the end of the central tube 2 extending out of the second end 12 to fix the connection between the other end of the central tube 2 and the second end 12 of the housing 1.

[0055] Of course, in the embodiment of the present application, the housing 1 and the central tube 2 are not limited to the above structures, and those skilled in the art can set them according to actual needs. For example, the housing 1 and the central tube 2 can be integrally formed or welded.

[0056] The end of the central tube 2 extending out of the second end 12 is connected to the end of the central column 41 extending out of the second end 12. As Figures 1 to 3 shown, the inner wall of one end of the central column 41 has internal threads, and these internal threads match the external threads of the end of the central tube 2 extending out of the second end 12. The central tube 2 and the central column 41 are threadedly connected to play a role in stabilizing the attitude of the aviation fire extinguishing bomb.

[0057] The multiple fins of the tail fin 4 cut the air flow during the landing process, which can not only reduce the wind resistance during landing, but also play a role in stabilizing the attitude of the aerial fire extinguishing bomb. By using the principle of aerodynamics, the aerial fire extinguishing bomb can maintain a fixed attitude during landing, which is beneficial to accurately control the detonation height and the spraying shape of the inhibitor.

[0058] Certainly, in the embodiment of the present application, the central column 41 and the central tube 2 are not limited to the above structures, and those skilled in the art can set them according to actual needs. For example, the central column 41 and the central tube 2 can also be connected and fixed by welding or interference fit and other methods.

[0059] The detonation assembly 3 is arranged in the central tube 2 to isolate the inhibitor in the housing 1 from direct contact with the detonation assembly 3 through the central tube 2.

[0060] In one example, the housing 1 has a receiving cavity 13 filled with an inhibitor, and the central tube 2 penetrates through the receiving cavity 13 along the axial direction of the housing 1.

[0061] As Figures 1 to 3 shown, the housing 1 has a receiving cavity 13, which is an independent cavity filled with an inhibitor. The inhibitor is stored in the receiving cavity 13 to keep the inhibitor sealed from the outside and avoid direct contact.

[0062] The inhibitor can be a dry powder fire extinguishing agent or an aqueous fire extinguishing agent. The inhibitors are all highly efficient fire extinguishing agents dedicated to forest and grassland.

[0063] The central tube 2 penetrates through the receiving cavity 13, that is to say, the central tube 2 is vertically placed in the housing 1, and the detonation assembly 3 in the central tube 2 is located in the receiving cavity 13. By detonating the assembly 3, the housing 1 is fully exploded, thereby effectively increasing the spraying area of the inhibitor. Moreover, placing the central tube 2 vertically or horizontally in the housing 1 so that the axial direction of the central tube 2 is the same as the axial direction of the housing 1 facilitates the assembly of the central tube 2 and the detonation assembly 3 and effectively reduces the labor intensity.

[0064] In one example, a first plug 21 is embedded at the end of the central tube 2 near the first end 11, a second plug 22 is embedded at the end of the central tube 2 near the second end 12, and the tail fin 4 is arranged at the second end 12 through the second plug 22.

[0065] As Figures 1 to 3 shown, the central tube 2 can be an independent entity. The inner walls at the opposite ends of the central tube 2 have internal threads. One end of the central tube 2 passes through the first end 11 of the housing 1, and the other end of the central tube 2 passes through the second end 12 of the housing 1.

[0066] The ignition assembly is installed inside the central tube 2. By inserting plug screws at opposite ends of the central tube 2, the ignition assembly inside the central tube 2 is fixed.

[0067] In one example, the aerial fire extinguishing bomb for forest and grassland fires further includes a protective cap 6, which is arranged at the end of the central tube 2 close to the first end 11, and the protective cap 6 is connected to the first plug screw 21.

[0068] As Figures 1 to 3 shown, a protective cap 6 is arranged at the first end 11 of the housing 1. That is to say, a protective cap 6 with a shape approximately similar to a hemisphere is configured on the windward side of the housing 1, which can reduce air resistance.

[0069] The protective cap 6 is connected to the end of the central tube 2 extending out of the first end 11. The inner wall of the protective cap 6 has internal threads, which match the external threads of the end of the central tube 2 extending out of the first end 11. The connection between the protective cap 6 and the end of the central tube 2 can not only reduce the resistance during landing, but also prevent the first plug screw 21 from falling off and causing the ignition assembly to separate from the central tube 2.

[0070] Of course, in the embodiments of the present application, the protective cap 6 and the central tube 2 are not limited to the above structures, and those skilled in the art can set them according to actual needs. For example, the protective cap 6 can also be fixed to the end of the central tube 2 extending out of the first end 11 through fasteners.

[0071] In one example, the detonation assembly 3 is arranged in the central tube 2, and the detonation assembly 3 includes a delay height-fixed detonation system 31, an ignition head 32, and pyrotechnic composition 33. The delay height-fixed detonation system 31, the ignition head 32, and the pyrotechnic composition 33 are arranged in sequence along the axial direction of the housing 1.

[0072] As Figures 1 to 3 shown, an ignition assembly is installed inside the central tube 2. The ignition assembly includes an ignition head 32, pyrotechnic composition 33, and a delay height-fixed detonation system 31. Both ends of the central tube 2 are fixed by plug screws.

[0073] The ignition assembly is stuffed into the central tube 2 of the housing 1 and fixed to the housing 1 through the external threads of the central tube 2 with a compression screw. The pyrotechnic composition 33 precisely controls the ignition of the ignition head 32 through the delay height-fixed detonation system 31 to detonate the pyrotechnic composition 33 and sprinkle the inhibitor above the fire site.

[0074] In one example, the delay height-fixed detonation system 31, the ignition head 32, and the pyrotechnic composition 33 are arranged in sequence from the first end 11 to the second end 12.

[0075] As Figures 1 to 3As shown, the delay height-fixed detonation system 31, the ignition head 32, and the pyrotechnic composition 33 are arranged in sequence from the first end 11 to the second end 12. That is to say, the delay height-fixed detonation system 31 is arranged on the side of the central tube 2 close to the first end 11, the pyrotechnic composition 33 is arranged on the side of the central tube 2 close to the second end 12, and the ignition head 32 is located between the delay height-fixed detonation system 31 and the pyrotechnic composition 33. The effects of such an arrangement need to be written out.

[0076] In one example, a filling port 14 is formed on the housing 1, and the filling port 14 communicates with the accommodating cavity 13.

[0077] As Figures 1 to 3 shown, a filling port 14 is provided at the second end 12 of the housing 1, and the filling port 14 communicates with the accommodating cavity 13. The inhibitor can be filled into the accommodating cavity 13 of the housing 1 through the filling port 14, so as to facilitate the transportation of the inhibitor by hanging with a flying device, and the inhibitor can be sprayed above the fire site through this aerial fire extinguishing bomb.

[0078] In one example, the aerial fire extinguishing bomb for forest and grassland fires further includes a sealing cover 5, and the sealing cover 5 is connected to the filling port 14.

[0079] As Figures 1 to 3 shown, the sealing cover 5 is tightly connected to the outer shell by threads. The inhibitor is filled into the accommodating cavity 13 of the housing 1 through the filling port 14, and then the sealing cover 5 is tightly connected to the outer shell by a threaded connection method to ensure the sealing performance of the housing 1 and prevent the inhibitor from leaking during transportation.

[0080] In one example, a plurality of strengthening structures are provided on the housing 1.

[0081] As Figures 1 to 3 shown, a plurality of protrusions are provided on the side wall of the housing 1. By providing protrusions on the side wall of the housing 1, the strength of the housing 1 is enhanced. The smaller the diameter of the housing 1, the greater the strength of the housing 1.

[0082] In the embodiment of the present application, the aerial fire extinguishing bomb is transported by a flying device. Within the payload range of the flying device, it is necessary to reduce the thickness of the housing 1 to reduce the load of the housing 1, so as to store more inhibitors. Therefore, when the thickness of the housing 1 is reduced, the strength of the housing 1 becomes smaller. By adding a plurality of protrusions on the side wall of the housing 1, the structural strength of the housing 1 is effectively improved, achieving a reduction in the load of the housing 1 within the payload of the flying device and an increase in the storage capacity of the inhibitor.

[0083] Of course, in the embodiment of the present application, the strengthening structure is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, a recessed portion can also be provided on the side wall of the housing 1 to improve the strength of the housing 1 by providing the recessed portion.

[0084] In one example, a bomb suspension hoop 15 is provided on the housing 1, and a pin shaft 151 is provided on the bomb suspension hoop 15. The pin shaft 151 is matched with a hook release of the flying device.

[0085] As Figures 1 to 3 shown, the bomb suspension hoop 15 is made of an elastic material. A pin shaft 151 is provided on the bomb suspension hoop 15. The bomb suspension hoop 15 is sleeved on the housing 1 of the aerial fire extinguishing bomb. The hook release of the flying device hooks the pin shaft 151 of the bomb suspension hoop 15 to hang the aerial fire extinguishing bomb under the flying device. When the hook release of the flying device is opened, the separation of the aircraft and the bomb can be achieved, and at the same time, the delay height-fixing detonation system 31 is activated.

[0086] In one example, a plurality of the bomb suspension hoops 15 are provided on the housing 1, and the plurality of bomb suspension hoops 15 are arranged along the axial direction of the housing 1.

[0087] In the embodiment of the present application, the bomb suspension hoop 15 is made of an elastic material, and the outer shape of the bomb suspension hoop 15 matches the outer shape of the housing 1. For example, the housing 1 has a cylindrical structure, and the bomb suspension hoop 151 has a hollow cylindrical shape and is sleeved outside the housing 1. Or, the housing 1 has a quadrangular prism structure, and the bomb suspension hoop 151 has a rectangular frame shape and is sleeved outside the housing 1.

[0088] One or two groups of bomb suspension hoops 15 are provided. At least one pin shaft 151 is provided on each bomb suspension hoop 15. The hook release of the flying device is connected to the bomb suspension hoop 15 through the pin shaft 151 to hang the aerial fire extinguishing bomb. By providing multiple groups of bomb suspension hoops 15, the stability during transportation is effectively improved, the center deviation of the aerial fire extinguishing bomb is prevented, and the accuracy of the landing direction of the aerial fire extinguishing bomb is improved.

[0089] In the embodiment of the present application, the aerial fire extinguishing bomb for forest and grassland fires covers aerial fire extinguishing bombs of different levels such as 300 kg level, 200 kg level, 100 kg level, 50 kg level, and 20 kg level. Different levels of fire extinguishing bombs are selected according to the size of the flying device such as manned helicopters or unmanned aerial vehicles of the carrying platform.

[0090] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An aerial fire extinguishing bomb for forest and grassland fires, characterized in that: include: A shell (1), the shell (1) having a first end (11) and a second end (12) arranged opposite to the first end (11), and a detonation assembly (3) being arranged in the shell (1); a tail wing (4), wherein the tail wing (4) is arranged at the second end (12), The tail wing (4) comprises a central column (41) and winglets (42), one end of the central column (41) is connected to the second end (12), a plurality of winglets (42) are evenly arranged along the circumferential direction of the central column (41), and a wind resistance reducing portion (421) is provided on a side of the winglet (42) facing away from the central column (41), and a distance between the wind resistance reducing portion (421) and the central column (41) gradually decreases from a direction away from the second end (12) to a direction close to the second end (12).

2. The aerial fire extinguishing bomb for forest and grassland fire according to claim 1, characterized in that: A central tube (2) is arranged in the shell (1), and the central tube (2) is arranged along the axial direction of the shell (1), one end of the central tube (2) extends out of the first end (11), and the other end of the central tube (2) extends out of the second end (12), and the end of the central tube (2) extending out of the second end (12) is connected to the end of the central column (41); Wherein, the detonation assembly (3) is arranged in the central tube (2).

3. The aerial fire extinguishing bomb for forest and grassland fire according to claim 2 is characterized in that: The shell (1) has a containing chamber (13), the containing chamber (13) is filled with an inhibitor, and the central tube (2) penetrates the containing chamber (13) along the axial direction of the shell (1).

4. The aerial fire extinguishing bomb for forest and grassland fire according to claim 2 is characterized in that: A first screw plug (21) is embedded in the end of the center tube (2) close to the first end (11), a second screw plug (22) is embedded in the end of the center tube (2) close to the second end (12), and the tail wing (4) is arranged at the second end (12) by being located in the second screw plug (22).

5. The aerial fire extinguishing bomb for forest and grassland fires according to claim 4 is characterized in that: It also comprises a protective cap (6), which is arranged on the end of the central tube (2) extending beyond the first end (11), and the protective cap (6) is connected to the first screw plug (21).

6. The aerial fire extinguishing bomb for forest and grassland fires according to claim 2, characterized in that: The detonation assembly (3) is arranged on the central tube (2), and the detonation assembly (3) comprises a time-delayed fixed-height detonation system (31), an ignition head (32) and pyrotechnic powder (33), and the time-delayed fixed-height detonation system (31), the ignition head (32) and the pyrotechnic powder (33) are arranged in sequence along the axial direction of the shell (1).

7. The aerial fire extinguishing bomb for forest and grassland fire according to claim 3 is characterized in that: The housing (1) is provided with a filling port (14), and the filling port (14) is communicated with the accommodating chamber (13).

8. The aerial fire extinguishing bomb for forest and grassland fires according to claim 7, characterized in that: It also comprises a sealing cover (5), wherein the sealing cover (5) is connected to the filling port (14).

9. The aerial fire extinguishing bomb for forest and grassland fires according to claim 1, characterized in that: The shell (1) is provided with a bomb hanging hoop (15), and the bomb hanging hoop (15) is provided with a pin shaft (151), and the pin shaft (151) matches with a dehooking device of the flight equipment.

10. The aerial fire extinguishing bomb for forest and grassland fire according to claim 9, characterized in that: A plurality of the bomb hanging hoops (15) are provided on the shell (1), and the plurality of the bomb hanging hoops (15) are arranged along the axial direction of the shell (1).

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