Bird repellent bombs and bird repellent cannons

Abstract

The present application discloses a bird-repelling bullet and a bird-repelling cannon used in conjunction with the bird-repelling bullet. The bird-repelling bullet includes a shell, which has an explosive chamber, a delay chamber and an ignition chamber connected in sequence, and explosives are stored in the explosive chamber; it also includes a fuse, which extends from the ignition chamber to the explosive chamber via the delay chamber; it also includes an electric conductor ignition piece, which is arranged in the ignition chamber and contacts the fuse, and the electric conductor ignition piece has a closed-loop structure, and the closed-loop structure has an electromagnetic induction end face facing the axial direction of the shell, so that when the shell moves along its axial direction and passes through a magnetic field, the electric conductor ignition piece generates an induced electromotive force through the electromagnetic induction end face, and forms an induced current closed-loop path through the closed-loop structure, so as to ignite the fuse by generating heat. The bird-repelling bullet of the above structure can realize rapid non-contact ignition, and the ignition and firing process of the bird-repelling cannon is fire-free and smoke-free, which is safe and environmentally friendly.

Description

Technical Field

[0001] The present application relates to the technical field of bird-repelling devices, and in particular to a bird-repelling bullet. The present application also provides a bird-repelling cannon. Background Art

[0002] The take-off and landing process of an aircraft is the most prone to bird strikes. More than 90% of bird strikes occur in the airspace near the airport and airport, and 50% occur in the airspace below 30 meters. Therefore, bird strikes have always posed a serious threat to the flight safety of aircraft. The existing mainstream bird repellent equipment basically adopts acoustic (such as sonic bird repellent) or optical (such as laser bird repellent, horror eye) principles to repel birds. These devices are easily adapted by birds after repeated use. It is difficult to achieve the goal of repelling birds by sound and optical effects alone. In addition, these devices will bring unnecessary sound and light pollution to the airport and the surrounding environment, and even have a certain impact on operators and surrounding residents.

[0003] After continuous attempts, some airports have begun to use real shells to drive away birds. Firecrackers and titanium mines are the two most commonly used and typical bird-repelling shells. They generally use a two-stage gunpowder ignition process, directly igniting to achieve the first stage of deflagration propulsion, so that the real shell flies toward the bird, and the second stage explodes in the air near the bird, producing multiple sensory effects such as sound, flash and shock waves. Years of application practice have shown that this type of bird-repelling shell is currently the most effective and efficient way to drive away birds, and the one that birds are least likely to adapt to.

[0004] However, there are many practical problems with existing bird repellent bombs.

[0005] First of all, the current physical artillery shells are large in size. In order to realize the two-stage gunpowder ignition process, special assembly requirements are required for ignition. For example, in order to ensure smooth ignition, a specific connection structure between the fuse ignition device and the bird-repelling bomb needs to be established. This process requires professional personnel to operate it personally. The operation is cumbersome and the degree of automation is low. At the same time, the number of artillery shells ignited each time is very limited and the timeliness is poor. A lot of manpower and time are required just for operation. The inconvenience and limitations of operation will further affect the flexibility and applicability of use, and it is difficult to adjust according to different occasions and scenarios.

[0006] Secondly, because the first stage of ignition needs to burn and explode to generate propulsion, it will challenge the safety of the launch process. There may also be unpredictable explosions in the barrel due to ignition errors or other accidents, which is a test for operators and launch equipment. In addition, the existing solid shells are first ignited in the barrel and then fired from the barrel. Once the barrel is blocked and cannot be ejected during the launch process, it is bound to cause irreparable damage to the barrel and even cause certain damage to the operator. In addition, the first stage of ignition, explosion and combustion will ablate the barrel on the one hand, causing irreversible damage to the barrel, and on the other hand, it will produce combustion residues and attach to the launch side, leaving obvious residues on the barrel wall, and then hinder the launch of subsequent shells, which is very dangerous. Therefore, the combustion residues usually require operators to clean them regularly, which is very inconvenient. In addition, the two-stage solid shells will leave obvious residues after the explosion in the air. The residues left by the overall arrangement in the airport are more and difficult to control, which is a very unfavorable factor for FOD (foreign substances that may damage aircraft) management.

[0007] Finally, the current structural design of bird-repellent bombs is easily affected by environmental factors, such as the use environment, storage environment, transportation environment, etc. Various factors in the environment may cause the bird-repellent bombs to fail (such as water in the rain) and safety issues (such as impact, open flames). Summary of the invention

[0008] In order to solve the above technical problems, the present application provides a bird-repellent bomb, which has no propulsion section and is small in size; it can be ignited non-contactly and quickly; there is basically no residue after explosion; the structure is stable and not prone to failure and has a high safety factor; it is flexible and efficient to load during use and can be used in conjunction with automated equipment.

[0009] The present application also provides a bird-repelling cannon, which has a high degree of automation; there is no fire or smoke during the ignition and firing process; and there is sufficient ammunition reserve to achieve continuous firing.

[0010] In order to solve the above problems, the present application provides a bird-repellent bomb, including a shell, the shell having an explosive chamber, a delay chamber and an ignition chamber connected in sequence, and explosives are stored in the explosive chamber; it also includes a fuse, the fuse extends from the ignition chamber to the explosive chamber via the delay chamber; it also includes an electric conductor ignition piece, the electric conductor ignition piece is arranged in the ignition chamber and contacts with the fuse, the electric conductor ignition piece has a closed-loop structure, and the closed-loop structure has an electromagnetic induction end face facing the axial direction of the shell, so that when the shell moves along its axial direction and passes through a magnetic field, the electric conductor ignition piece generates an induced electromotive force through the electromagnetic induction end face, and forms an induced current closed-loop path through the closed-loop structure to generate heat and ignite the fuse.

[0011] Utilizing the principle of electromagnetic induction, the closed-loop structure of the electric conductor ignition component instantly generates an induced current when passing through a magnetic field, thereby rapidly increasing the temperature of the electric conductor ignition component to reach the ignition point of the fuse and then ignite the fuse; the closed-loop structure of the electric conductor ignition component enables the bird-repellent bomb to be quickly ignited when passing through the magnetic field during the launching process, achieving efficient ignition without limiting the position of the bird-repellent bomb, so that the bird-repellent bomb can be launched first and then ignited, providing more possibilities for the application scenarios of the bird-repellent bomb.

[0012] The present application adopts thermistor electric heating ignition, that is, the ignition method without open flame or electric spark, which can be used in conjunction with cold ejection (such as pneumatic ejection). The entire launching and ignition process is fire-free and smoke-free, safe and environmentally friendly; the electric heating ignition and the bird-repelling bomb are sealed and packaged, and the internal electric conductor ignition parts and explosives are not sensitive to the external temperature, but the electric conductor ignition parts can be heated by electromagnetic induction, so even if the environment is high temperature, the bird-repelling bomb will not be ignited. The bird-repelling bomb can be used with any launching device, so there is no need for a booster stage, only a cavity for storing explosives is needed, and a small volume and a large amount of explosives are achieved. The size of the same amount of explosives is smaller, and there is basically no residue when launching and after the explosion without a booster stage.

[0013] In one embodiment, the closed-loop structure is a circular sheet structure. The circular sheet structure can ensure both the maximum area of ​​the electromagnetic induction end face and the minimum ignitable volume on the basis of ensuring the closed-loop structure.

[0014] Furthermore, the axis of the circular sheet structure is arranged along the axial direction of the shell, the electromagnetic induction end face is perpendicular to the axial direction of the shell, and the outer edge of the circular sheet structure abuts against the inner wall of the shell. With non-contact ignition, when the bird-repellent bullet is loaded into the launch device, it can be directly judged according to the shape of the bird-repellent bullet, without the need to distinguish the front and back or alignment by other features, thus saving loading time.

[0015] In one embodiment, the circular sheet structure is further provided with an ignition hole, the ignition hole wall forms an ignition area, and the fuse abuts against the ignition area. Through the contact between the electrical conductor ignition element and the fuse, a fixed point on the fuse can be ignited, so that the detonation time can be controlled by controlling the length of the fuse in the delay cavity.

[0016] In one embodiment, the delay cavity is arranged along the inner wall of the shell, and it extends along the axial direction of the shell. The fuse is arranged along the inner wall of the shell, which is convenient for the machine to automatically assemble the bird-repelling bomb and improve production efficiency; it can also reduce the flame-retardant material wrapping the delay cavity, providing more space for explosives or other parts.

[0017] In one embodiment, the bird-repellent bomb further includes a cover disposed at both ends of the shell, and the cover seals the explosive chamber, the delay chamber and the ignition chamber in the shell. Sealing the fuse in the shell can be waterproof and fireproof; the possibility of the exposed fuse being ignited during production and transportation is reduced, and the safety of the bird-repellent bomb is enhanced; and the bomb body is completely sealed, and the fuse is not easily damaged during transportation or loading and use, effectively avoiding the failure of the bird-repellent bomb caused by the failure of the fuse; loading is simple and convenient, and there is no need to consider the direction of the fuse according to the ignition position, which improves the loading efficiency.

[0018] Furthermore, when the cover is closed on the end of the shell, the outer side surface thereof is not lower than the end surface of the shell, which can effectively enhance the strength of the bird-repelling bullet and avoid the risk of the bird-repelling bullet being disassembled under high-speed operation under the action of airflow.

[0019] The present application also provides a bird-repelling cannon, which includes a gun barrel; an ignition device, which is arranged outside the gun barrel and can generate a magnetic field in an area of ​​the gun barrel to form an ignition area; a bird-repelling bullet that can be placed in the gun barrel, the axial direction of the bird-repelling bullet being colinear with the axial direction of the gun barrel; and a launching device, which can drive the bird-repelling bullet to be launched along the gun barrel, and when passing through the ignition area, an electric conductor ignition component generates an induced electromotive force through an electromagnetic induction end face, and forms an induced current closed-loop path through a closed-loop structure to generate heat and ignite a fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 The present invention is a schematic cross-sectional structural diagram of an exemplary implementation of a bird-repelling bomb.

[0022] Figure 2 The present invention is a schematic cross-sectional structural diagram of an exemplary embodiment of a shell of a bird-repelling bullet.

[0023] Figure 3 The exploded perspective view is a partial structure of a schematic implementation of a bird-repelling bomb.

[0024] Figure 4 Schematic diagram of an electrical conductor igniter passing through a magnetic field.

[0025] Figure 5 This is a schematic diagram from another angle when the electric conductor ignition element passes through the magnetic field.

[0026] Figure 6 The present invention is a schematic diagram of a bird-repelling cannon according to an exemplary embodiment.

[0027] Among them, 10-cartridge case, 12-fuel chamber, 13-delay chamber, 14-ignition chamber, 15-cartridge case axis, 20-fuse, 30-electric conductor ignition part, 31-electromagnetic induction end face, 32-ignition hole, 40-cap, 50-bird repellent, 51-barrel, 52-ignition device, 53-launching device, 60-flame retardant filler, 70-combustible material. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0029] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0030] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "axial", "radial", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] Figure 1 FIG. 1 is a cross-sectional structural diagram of an exemplary embodiment of a bird-repelling bomb. Figure 1 As shown, the bird-repelling bullet 50 includes a shell 10, a fuse 20 and an electric conductor ignition element 30.

[0032] The structure of the cartridge case 10 can also be seen in Figure 2 The shell 10 has an explosive chamber 12, a delay chamber 13 and an ignition chamber 14 which are connected in sequence, that is, the explosive chamber 12 is connected to the delay chamber 13, and the delay chamber 13 is also connected to the ignition chamber 14. The ignition chamber 14 and the explosive chamber 12 can be separated by a flame retardant filler 60, and an explosive 70 is stored in the explosive chamber 12. The explosive chamber 12 provides a closed space for the explosive 70, so that the explosive 70 can burn rapidly in the closed space when ignited, release a large amount of heat energy and generate high-temperature and high-pressure gas, so as to achieve the explosion of the bird-repelling bomb 50. Of course, those skilled in the art can understand that according to different design requirements, the physical structure of the shell 10 may not be limited to that shown in the figure, as long as the corresponding explosive chamber 12, delay chamber 13 and ignition chamber 14 can be formed.

[0033] See also Figure 1 and Figure 2The fuse 20 can extend from the ignition chamber 14 to the explosive chamber 12 via the delay chamber 13, and contact the explosive 70 stored in the explosive chamber 12. The fuse 20 can be a fuse with a certain density of powdered black powder and wrapped with a paper strip or cotton thread, or a foam glue, etc., but it is certainly not limited to this. The explosive 70 can be a combustible material such as explosives, but it is certainly not limited to this.

[0034] See also Figure 1 and Figure 2 The electric conductor ignition member 30 is disposed in the ignition chamber 14 and contacts the fuse 20. The electric conductor ignition member 30 has a closed loop structure and can be simultaneously Figure 3 , Figure 3 The exploded perspective view of the local structure of a schematic embodiment of a bird-repelling bomb is shown in FIG. The closed-loop structure of the electric conductor igniter 30 has an electromagnetic induction end face 31 facing the axial direction 15 of the shell, that is, facing the direction of the axis extension.

[0035] During the movement of the bird-repelling bomb, such as during the shooting of the bird-repelling bomb 50 by a bird-repelling gun (see Figure 6 ), the electric conductor ignition element 30 will move with the bird-repelling bullet shell 10, and the moving direction is the shell axial direction 15. When the bird-repelling bullet passes through the magnetic field, please refer to Figure 4 The electromagnetic induction end face 31 of the electric conductor ignition element 30 will generate an induced electromotive force under the action of the magnetic field, see Figure 5 The generated induced electromotive force will form an induced current closed loop path through the closed loop structure. After the closed loop path is formed, the electric conductor ignition element 30 can heat up very quickly (millisecond level) to ignite the fuse 20, so that the fuse 20 inside the bird-repelling bomb can be ignited during the movement of the bird-repelling bomb. The fuse 20 will continue to burn during the movement of the bird-repelling bomb, and will ignite the explosive 70 in the explosive chamber 12 after a delay of a period of time through the delay chamber 13 (see Figure 1 ) to detonate the bird-repellent bomb.

[0036] In a specific embodiment, the magnetic field is an alternating magnetic field, and the direction of the magnetic field is Figure 4 The directions of the two arrows shown change alternately, or you can refer to Figure 5 ,exist Figure 5 In the figure, the magnetic field changes alternately between being perpendicular to the paper plane and ... Figure 4 and Figure 5The direction shown is, of course, not limited to this direction. After the electric conductor ignition element 30 generates an induced electromotive force, in order to achieve instantaneous ignition, the closed loop structure can directly form a structure for guiding the induced current, so as to guide the instantaneously generated induced current to form a path along the closed loop structure. In this case, according to Joule's law, the electric conductor ignition element 30 can be heated instantaneously to reach the ignition point. The electromagnetic induction end face 31 is formed by using the end face of the closed loop structure, so as to receive as many magnetic field lines as possible in a limited space and receive as much magnetic field energy as possible in an instant.

[0037] Therefore, the closed-loop structure of the electric conductor ignition element 30 and the electromagnetic induction end face 31 enable the bird-repelling bomb 50 to be quickly ignited when passing through the magnetic field. Even during the high-speed launch of the bird-repelling bomb 50, non-contact instant ignition can be achieved. The ignition method formed by this structure completely gets rid of the structural type of the existing bird-repelling bomb that must go through a two-stage explosion. The first-stage propulsion method of the bird-repelling bomb is no longer limited to the explosion structure and form, which makes the propulsion drive method of the bird-repelling bomb more possible.

[0038] For example, in a preferred embodiment, the bird-repelling bomb provided by the present application can be launched into the sky by pneumatic means. Before the bird-repelling bomb is driven away from the launch device, the fuse 20 can be ignited contactlessly by an external magnetic field. When the bird-repelling bomb reaches a certain altitude, the fuse 20 inside the bird-repelling bomb will contact the explosive in the explosive cavity to explode. Of course, in addition to the pneumatic means, those skilled in the art can understand that the bird-repelling bomb can also provide the driving force for launching by any possible technical means in the prior art.

[0039] Due to the unpredictability of explosive propulsion, the existing bird-repelling bombs cannot effectively and accurately control their propulsion height, and cannot adapt to different usage scenarios and needs. The bird-repelling bomb of the present application abandons the method of launching through explosive propulsion, and other driving methods will not affect its internal ignition. For example, through the pneumatic driving method, the launch height of the bird-repelling bomb can be more accurately controlled, and it is easy to flexibly change according to different usage scenarios and needs, such as the launch height of the bird-repelling bomb can be controlled by accurately controlling the pressure of the driving gas.

[0040] Whether it is pneumatic or other driving methods, the driving process of the first stage of the bird-repelling bullet of the present application does not need to be composed of internal explosions, and it also significantly improves the safety of the bird-repelling bullet when it is used. For example, it can be effectively prevented from bursting the chamber due to unsuccessful firing after ignition by first firing and then igniting without contact. More importantly, due to the internal structural design of the bird-repelling bullet, the bird-repelling bullet can be internally ignited when passing through the magnetic field at high speed. This non-contact ignition method does not need to consider the establishment of a static matching relationship between the bird-repelling bullet and the ignition device, especially does not need to establish a direct connection structure. There will be no structural restrictions on the firing, loading and filling of the bird-repelling bullet. It provides particularly significant convenience in terms of operation, such as the possibility of automatic loading and filling, and the possibility of automatic firing and ignition, which can greatly save the manpower cost and time cost invested in operation.

[0041] In addition, because non-contact ignition can be achieved, the structural design of the bird-repellent bomb can more effectively avoid the influence of environmental factors, and waterproofing and explosion-proofing are very easy to achieve, which will bring additional advantages in multiple links such as use and transportation.

[0042] In an exemplary embodiment, Figure 3 As shown, the closed-loop structure is a circular sheet structure. The circular sheet structure is the shape that is most sensitive to the electromagnetic induction phenomenon, and is also the shape that makes the electric conductor ignition piece 30 heat up the fastest. Compared with the square closed-loop structure or other closed-loop structures, the circular closed-loop structure has a uniform closed-loop resistance, and there is no small resistance area at the corner of the square closed-loop structure, which can achieve the rapid heating of the entire electric conductor ignition piece 30. The electric conductor ignition piece 30 can be a copper circular sheet structure, or other conductor materials can be selected. It has a small thickness, which can provide more space for other structures in the bird-repelling bomb 50 while achieving rapid heating. More importantly, the circular sheet structure can ensure the maximum area of ​​the electromagnetic induction end face and the minimum ignitable volume on the basis of ensuring the closed-loop structure. The smaller the ignitable volume, the faster the temperature rises and the higher the maximum temperature reached. Those skilled in the art can select electric conductor ignition pieces 30 of different sizes according to the fuse 20 with different burning points. In addition, the circular sheet structure is small in size and is basically completely shattered after the bird-repellent bomb 50 explodes, leaving no obvious solid residue.

[0043] Furthermore, the axis of the circular sheet structure is arranged along the axial direction of the cartridge case 10, the electromagnetic induction end surface 31 is perpendicular to the axial direction of the cartridge case 10, and the outer edge of the circular sheet structure abuts against the inner wall of the cartridge case 10. Figure 1 , Figure 3As shown, the cartridge case 10 may use a cylindrical cartridge case 10, and the outer edge of the annular sheet structure fits with the inner wall of the cartridge case 10, which is conducive to the installation and fixation of the electric conductor ignition component 30 with the annular sheet structure in the bird-repellent bullet 50, and can prevent the electric conductor ignition component 30 from shifting during the firing process and causing ignition failure. During the ignition process of the bird-repellent bullet 50, there is an optimal angle between the axial direction of the electric conductor ignition component 30 and the direction of the magnetic field magnetic flux lines. The axis of the annular sheet structure is arranged along the axial direction of the cartridge case 10, and the electromagnetic induction end face 31 is perpendicular to the axial direction of the cartridge case 10. The axial direction of the electric conductor ignition component 30 at this time can be determined based on the cylindrical or other shaped shell characteristics of the bird-repellent bullet 50, so that it can be directly loaded according to demand, without distinguishing the axial direction of the electric conductor ignition component 30, that is, there is no need to distinguish the front and rear ends of the bird-repellent bullet in the firing direction. As shown Figure 1 , Figure 3 In the bird-repelling bullet 50 shown, the two ends of the shell 10 along the axial direction do not need to be distinguished between upper and lower sections and can be directly loaded, thereby improving the loading efficiency.

[0044] A further optimization of the circular sheet-shaped electric conductor ignition element 30 is that the circular sheet-shaped structure is further provided with an ignition hole 32, the hole wall of the ignition hole 32 forms an ignition area, and the fuse 20 abuts against the ignition area. Figure 1 , Figure 3 , Figure 5 As shown, the fuse 20 extends into the ignition hole of the annular ignition piece and contacts the ignition area formed by the side wall of the ignition hole, so that the contact area between the fuse 20 and the electric conductor ignition piece 30 can be increased, and the reliability of the electric conductor ignition piece 30 igniting the fuse 20 can be improved; and when assembling the bird-repelling bomb 50, the electric conductor ignition piece 30 can be first fixed on the shell 10 or the flame-retardant filler 60, and its ignition hole is aligned with the delay cavity 13, and then the fuse 20 is inserted through the ignition hole. At this time, it can be observed from the outside whether the fuse 20 is in good contact with the annular ignition piece, thereby reducing the defective rate of the production and assembly of the bird-repelling bomb 50.

[0045] In an exemplary embodiment, the delay cavity 13 is arranged along the inner wall of the cartridge case 10, and extends along the axial direction of the cartridge case 10. Figure 2 As shown, the flame retardant filler 60 can form a delay cavity 13 with the inner wall of the cartridge case 10, and the fuse 20 is placed in the delay cavity 13 along the inner wall of the cartridge case 10, so as to facilitate the automatic assembly of the bird-repellent bomb 50 by the machine, realize the automatic installation of the fuse 20, and improve the production efficiency; on the other hand, the flame retardant filler 60 wrapped in the delay cavity 13 can also be reduced to provide more space for the explosive 70 or other structures.

[0046] In an exemplary embodiment, Figure 1 , Figure 2 , Figure 3As shown, the bird-repellent bomb 50 also includes covers 40 disposed at both ends of the shell 10, and the covers 40 seal the explosive chamber 12, the delay chamber 13 and the ignition chamber 14 in the shell 10. The bird-repellent bomb 50 eliminates the exposed fuse or wire, and completely seals the electrical conductor ignition component 30 and the explosive 70 in the shell 10, especially the fuse 20 is completely sealed inside the bird-repellent bomb 50, which can prevent the exposed fuse of the bird-repellent bomb 50 from being accidentally ignited by open flames or extrusion and friction, and can also prevent the fuse 20 from being wetted by water and becoming ineffective or the internal wire from short-circuiting. Therefore, the bird-repellent bomb 50 can be used normally even in heavy rain, achieving all-weather bird-repelling. In addition, please also refer to Figure 6 The bird-repelling bullet 50 is no longer bound by the exposed ignition wire or wire, and there is no need to accurately connect the exposed ignition wire or wire with the fixed position of the launch device 53 during firing. For example, the bird-repelling bullet 50 can be directly placed on the barrel 51 of the launch device 53. It takes less than one second to load a shell, which greatly improves the loading speed and efficiency. Moreover, the bird-repelling bullet 50 can be stored in large quantities in the magazine, and hundreds of shells can be loaded at a time. The bird-repelling bullet 50 can also be sent to the firing position by designing an automatic loading device, which greatly improves the automation degree and continuous firing capability of the bird-repelling bullet 50, while saving manpower.

[0047] A further optimization of the cover 40 of the bird-repelling bomb 50 is that when the cover 40 covers the end of the shell 10, its outer side surface is not lower than the end surface of the shell 10. In the device for pneumatically propelling the bird-repelling bomb 50 into the air, the high-pressure gas will cause a strong impact on the bird-repelling bomb, so that the bird-repelling bomb 50 is not lower than the end surface of the shell 10. Figure 6 Taking the illustrated method as an example, when the airflow quickly pushes the bird-repelling bullet 50 to move forward, since there is a gap between the bird-repelling bullet 50 and the gun barrel 51, the airflow in the gap will cause the bird-repelling bullet 50 to form a negative pressure on the side facing the muzzle. If the bird-repelling bullet 50 does not have a cover 40 design on the side facing the muzzle, the negative pressure will challenge the structural strength of the bird-repelling bullet 50 and may damage the structure of the bird-repelling bullet 50. Therefore, the cover 40 design can effectively enhance the strength of the bird-repelling bullet 50 and avoid the risk of the bird-repelling bullet 50 being disassembled under the high-speed operation under the action of airflow.

[0048] The present application also provides a bird-repelling cannon, see Figure 6, which includes a gun barrel 51, an ignition device 52, a launcher 53 and a bird-repelling bullet 50. The ignition device 52 is arranged outside the gun barrel 51, and the ignition device 52 can generate a magnetic field in an area of ​​the gun barrel 51 to form an ignition area. The bird-repelling bullet 50 can be placed in the gun barrel 51, and the axial direction of the bird-repelling bullet 50 is collinear with the axial direction of the gun barrel 51. The launcher 53 can drive the bird-repelling bullet 50 to be launched along the gun barrel 51, and when passing through the ignition area, the electric conductor ignition member 30 generates an induced electromotive force through the electromagnetic induction end face 31, and forms an induced current closed loop path through a closed loop structure to ignite the fuse 20 by heating. The launcher 53 can select a cold ejection device such as a spring or an air pump, which replaces the gunpowder combustion gas booster launch of a double-kick firecracker, and the launch process is fire-free and smoke-free, safe and environmentally friendly, and will not cause ablation of the gun barrel 51. Because the bird-repellent bomb 50 does not need a booster section for launch, the bird-repellent bomb 50 can be simplified into a single-chamber structure, that is, there is only one explosive storage chamber 12, which saves the propelling gunpowder and gets rid of the structural type of the existing bird-repellent bomb that must use a double-stage propelling gunpowder for double-end explosion. The structure of the bird-repellent bomb 50 is simplified, and the production cost is reduced. More explosives 70 can be loaded under the same size as the existing bird-repellent bomb, or the size and weight are smaller under the same explosive 70 loading amount, so that the bird-repellent bomb can have the same or even more obvious explosion effect under the condition of reduced volume, and at the same time, the propulsion driving mode of the bird-repellent bomb has more possibilities; the booster section of the existing bird-repellent bomb is the main residue after the explosion, and the bird-repellent bomb provided by the present application can avoid this problem.

[0049] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0050] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A bird-repelling bomb, characterized in that: include: A cartridge case, wherein the cartridge case has an explosive chamber, a delay chamber and an ignition chamber which are connected in sequence, and an explosive is contained in the explosive chamber; a fuse extending from the ignition chamber through the delay chamber to the explosive chamber; An electric conductor ignition piece, wherein the electric conductor ignition piece is arranged in the ignition cavity and contacts the fuse, and the electric conductor ignition piece has a closed-loop structure, and the closed-loop structure has an electromagnetic induction end face facing the axial direction of the cartridge case, so that when the cartridge case moves along its axial direction and passes through a magnetic field, the electric conductor ignition piece generates an induced electromotive force through the electromagnetic induction end face, and forms an induced current closed-loop path through the closed-loop structure, so as to generate heat to ignite the fuse, and ignite the explosive through the fuse.

2. The bird-repelling bomb according to claim 1, characterized in that: The closed-loop structure is a circular ring sheet structure.

3. The bird-repelling bomb according to claim 2, characterized in that: The axis of the circular sheet structure is arranged along the axial direction of the cartridge case, the electromagnetic induction end surface is perpendicular to the axial direction of the cartridge case, and the outer edge of the circular sheet structure abuts against the inner wall of the cartridge case.

4. The bird-repelling bomb according to claim 2, characterized in that: The annular sheet structure is also provided with an ignition hole, the hole wall of the ignition hole forms an ignition area, and the fuse abuts against the ignition area.

5. The bird repellent bomb according to claim 1, characterized in that: The delay cavity is arranged along the inner wall of the cartridge case, and extends along the axial direction of the cartridge case.

6. The bird-repelling bomb according to claim 1, characterized in that: It also includes covers arranged at both ends of the cartridge case, and the covers seal the explosive chamber, the delay chamber and the ignition chamber in the cartridge case.

7. The bird-repelling bomb according to claim 6, characterized in that: When the cover is closed on the end of the cartridge case, the outer surface thereof is not lower than the end surface of the cartridge case.

8. Bird-repelling cannon, characterized in that: It includes: Gun barrel; An ignition device, which is arranged outside the gun barrel and can generate a magnetic field in an area of ​​the gun barrel to form an ignition area; The bird-repelling bomb according to any one of claims 1 to 7, which can be placed in the gun barrel, and whose axial direction is colinear with the axial direction of the gun barrel; and A launching device, wherein the launching device can drive the bird-repelling bullet to be launched along the gun barrel, and when passing through the ignition area, the electric conductor ignition element generates an induced electromotive force through the electromagnetic induction end face, and forms an induced current closed-loop path through the closed-loop structure to generate heat and ignite the fuse.

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