A fuse with characteristics for dealing with explosives after misfire

Abstract

The present invention discloses a fuse with the characteristics of explosive disposal after misfire. For an electrically initiated fuse with self-disabling characteristics or a mechanically initiated fuse with self-expiring characteristics, N outward-facing radial holes are preset at positions on structural components such as the fuse body that are not easily deformed by target collision. These radial holes lead to the inner cavity of the explosion isolation mechanism and can be used to transfer fire to the input end of the flame detonator. The radial holes are usually blocked by screws. After the fuse misfires accidentally, any one of the blocking screws can be unscrewed, a plastic detonating fuse or an electric igniter is inserted into the hole of the blocking screw, fixed with tape, and then the plastic detonating fuse or the electric igniter is initiated, so that the flame detonator in the misfired fuse is input with a flame impulse again. When the flame detonator fires, the fuse will enter the non-fire state or detonate the unexploded ammunition, completing the safety disposal of the unexploded ammunition. When the flame detonator fails to fire accidentally, it is very difficult for the fuse to fire again, thus entering the self-expiring state, improving the safety of unexploded ammunition disposal.

Description

Technical Field

[0001] The present invention belongs to the technical fields of fuzes and explosive ordnance disposal, and in particular, to a fuze having the characteristics of explosive ordnance disposal after misfire. Background Art

[0002] With the development of modern warfare, higher requirements are put forward for the performance of fuzes. The "Fuzes Safety Design Criteria" GJB373B-2019 requires that fuzes should have the characteristics of explosive ordnance disposal to ensure the safety during the disposal of ammunition explosives. Fuzes play a key role in the performance of warheads. There have been many studies on ensuring reliable initiation when the ammunition hits the target and ensuring safety during service handling. However, the research on the safe disposal of unexploded ordnance after use is still relatively lacking. During the outfield tests of fuzes, live ammunition combat training and even on modern battlefields, there are often unexploded ammunitions due to misfires of fuzes. Their existence not only affects the safety of weapon researchers, but also poses a threat to friendly troops and civilians. Taking the CBU-58 cluster bomb as an example, a CBU-58 is equipped with 650 submunitions, and about 26 unexploded ordnances will be produced. A B-52 bomber can carry 45 CBU-58 cluster bombs, with a total of about 1,170 unexploded submunitions produced, sinking into the ground to become "landmines", which will pose a great threat to the lives and safety of local civilians.

[0003] There are many reasons for the misfire of fuzes. From the overall perspective of the projectile, too small impact angle, charge denaturation caused by the ammunition storage environment, etc. may all lead to misfires of fuzes and the production of unexploded ordnances. From the specific internal structure of the fuze, it may be that the arming mechanism and the intermediate burst mechanism fail to arm, or the firing mechanism fails to fire, or the explosive elements in the explosion train fail to transfer the detonation, etc. According to the literature "Analysis of the Failure of a Certain Mechanical Trigger Fuze on the Plateau" (Wang Hainan, Wang Jizhong. Analysis of the Failure of a Certain Mechanical Trigger Fuze on the Plateau [J]. Ship Electronic Engineering, 2013, 33(3): 14-16. DOI: 10.3969 / j.issn.1627-9730.2013.03.006.), during the live ammunition shooting training with small charges on the plateau by a certain unit using a certain type of mortar, misfires of fuzes occurred continuously for many times. The misfired part was the turbine arming mechanism. Due to the relatively low air density in the plateau area, the turbine arming mechanism driven by aerodynamic force failed to arm reliably. Most of the unexploded ordnances caused by the misfire of fuzes have their fuzes in an unstable state. With another vibration or impact, there is a possibility of accidental re-firing and causing safety accidents. Therefore, it is necessary to conduct explosive ordnance disposal on them.

[0004] When destroying unexploded ordnances, the safety of personnel and equipment during the destruction process should be ensured, and the impact on the environment, production and living facilities should be minimized as much as possible. On this basis, ensure the reliable completion of the destruction task. The operation should be as simple as possible to improve the efficiency of ammunition destruction and reduce the destruction cost.

[0005] Nowadays, the treatment of unexploded bombs in test sites, training grounds or battlefields is mostly to disassemble the ammunition first, and then empty, burn or blow up the explosive charge in the ammunition. However, after the fuze misfires, it is very likely that it is still in a dangerous state of readiness, and its sensitive explosive components have not failed. The disassembly and disassembly of unexploded bombs often requires a large amount of movement, which is easy to cause the fuze to fire accidentally. In addition, the disassembly and disassembly of unexploded bombs require professional equipment and professionals, and the investment cost is high. Therefore, the explosion technology is an indispensable method for the disposal of explosives. At present, the explosion method is mostly used to deal with unexploded bombs by explosives. A certain amount of high explosives is placed on the annular surface of the ammunition to be destroyed, and the warhead is detonated by the explosion of explosives to destroy the unexploded bomb. When destroying unexploded bombs by the explosion method, it is generally difficult to directly detonate the object with a single detonator, and a certain amount of explosives must be used as a detonation device; in actual operations, it is difficult to deal with a single unexploded bomb. It is often necessary to pile up batches of unexploded bombs in a specific shape and then destroy them in a centralized manner, which has poor flexibility. If the fuze structure can be changed during fuze design to achieve on-site destruction of a single unexploded bomb without the need for additional explosives, it will be easier to ensure the safety and efficiency of explosive disposal. Therefore, when handling unexploded bombs, the appropriate disposal method can be selected based on the fuze structure principle and ammunition characteristics. Those that can be destroyed on-site can be destroyed on-site, and those that can ensure the safety of ammunition can be transported away, thereby reducing the workload of explosive disposal and improving work efficiency. Summary of the invention

[0006] The object of the present invention is to provide a fuze with the characteristic of handling explosives after misfire, so as to realize on-site disposal of unexploded bombs in a test field, a training field or a battlefield. When the unexploded bombs use electric ignition fuzes with self-deactivation characteristics or mechanical fuzes with self-deactivation characteristics, under the condition that on-site detonation does not cause collateral damage, plastic detonating tubes or electric ignition heads can be used to destroy the unexploded bombs on-site, thereby ensuring the safety of subsequent disposal of the unexploded ammunition.

[0007] The technical solution for achieving the object of the present invention is as follows: A fuze with the characteristic of explosive disposal after misfire, comprising a fuze body, an explosion isolation mechanism, a detonating train, N plugging screws and N sealing washers. N uniformly distributed radial holes and a fire transmission channel are opened on the fuze body. A flame detonator is provided inside the explosion isolation mechanism. The radial holes are arranged at positions that are not easily deformed by target collision, and lead from the outside to the inside along the radial direction or close to the radial direction of the fuze body and finally lead to the inner cavity of the explosion isolation mechanism through the fire transmission channel for transmitting fire to the input end of the flame detonator in the explosion isolation mechanism. A sealing washer is provided at the outer end of the radial hole, and the sealing washer is fixed to the fuze body by a plugging screw to achieve the plugging and sealing of the radial hole. The plugging screw is made of stainless steel or copper alloy and is connected by threads inside the radial hole. When the fuze misfires accidentally, any one of the plugging screws can be unscrewed, a plastic detonating tube or an electric igniter is inserted into the hole of the plugging screw, fixed with tape or quick-drying adhesive, and then the plastic detonating tube or the electric igniter is triggered to input a flame impulse to the flame detonator in the misfired fuze again. When the flame detonator fires, it will detonate the unexploded ammunition in the fuze or enter the non-fire state to complete the safety disposal of the unexploded ammunition; while the fuze in which the flame detonator still accidentally does not fire is very difficult to fire again, thus entering the self-invalidating state, and it can be judged according to its structural principle and can be transported and processed in principle.

[0008] Compared with the prior art, the remarkable advantages of the present invention are as follows: By adding radial holes on the fuze body that finally lead to the inner cavity of the explosion isolation mechanism through the fire transmission channel, without increasing the existing size and without changing the existing structure of the fuze, unexploded ordnance can be disposed of on the spot in the test field, training ground or battlefield, improving the safety and efficiency of dealing with unexploded ammunition; good versatility, capable of dealing with the accidental misfires of electric ignition fuzes, stab ignition fuzes and percussion ignition fuzes; independent modules, which is conducive to assembly production and has a lower cost.

[0009] The following further describes the present invention in detail with reference to the drawings and specific embodiments. Description of the Drawings

[0010] Figure 1 It is an axial sectional view of a fuze with the characteristic of explosive disposal after misfire. Specific Embodiments

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0012] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0013] In the present invention, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; "connection" can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] Combined with Figure 1 , a fuse with the characteristics of explosive disposal after misfire, including a fuse body 1, an explosion isolation mechanism, a detonating train 7, N plugging screws 4 and N sealing washers 5. N uniformly distributed radial holes 2 and a fire transmission channel 3 are opened on the fuse body 1. A flame detonator 6 is provided in the explosion isolation mechanism; the fire transmission channel 3, the explosion isolation mechanism, and the detonating train 7 are coaxially located in the fuse body 1. The radial holes 2 are arranged radially or nearly radially along the fuse body 1 from the outside to the inside and finally lead to the inner cavity of the explosion isolation mechanism through the fire transmission channel 3. A sealing washer 5 is provided at the outer end of the radial hole 2. The sealing washer 5 is fixed to the fuse body 1 by the plugging screw 4 to achieve the plugging and sealing of the radial hole 2. The safety parts of the explosion isolation parts of the fuse are not related to the present invention and are not drawn in detail here.

[0015] Furthermore, 2 to 4 radial holes 2 should be provided, which are usually plugged by the plugging screws 4 and are arranged at positions that are not easily collided and deformed to prevent the plugging screws 4 from being locked due to the deformation and extrusion caused by the ammunition hitting the target and being difficult to unscrew when needed. The plugging screws 4 are made of stainless steel or copper alloy and are in clearance thread fit in the radial holes 2 to facilitate the quick and easy unscrewing of the plugging screws 4 after the fuse misfires accidentally.

[0016] Specifically, after the fuze accidentally misfires, when it is ensured that the capping screw 4 can be safely unscrewed without causing the fuze to accidentally fire again, for example, impact - fired fuzes and electric - fired fuzes have electric - firing energy dissipation characteristics, and stab - fired fuzes have self - inactivation characteristics. Unscrew any one of the plugging screws 4, insert a plastic detonator tube or an electric igniter into the sealing radial hole 2, fix it with tape or a quick - drying adhesive, and after moving away to a safe separation distance, trigger the electric igniter or the plastic detonator tube. After the plastic detonator tube or the electric igniter fires, it ignites the flame detonator 6 in the intermediate - isolation mechanism. If the fuze has been armed, at this time, the flame detonator 6 will detonate the subsequent explosive train 7, and then detonate the main charge in the projectile or warhead, and the projectile or warhead will be detonated (destroyed). If the fuze has not been armed, at this time, the flame detonator 6 is detonated, the fuze enters the non - firing state, and the unexploded ammunition enters the safe state, which can ensure the safety of subsequent disposal. If the plastic detonator tube or the electric igniter still fails to detonate the flame detonator 6 in the intermediate - isolation mechanism after firing, such a fuze is very difficult to fire again, thus entering the self - inactivation state, which can ensure the safety of unexploded ammunition disposal.

[0017] The electric igniter uses an insensitive electric igniter (tube), which has better safety during explosive disposal. A small - sized insensitive electric detonator can also be used as a substitute.

[0018] If the intermediate - isolation mechanism of the fuze contains a stab detonator or an electric detonator instead of a flame detonator, the externally added plastic detonator tube or electric igniter should be replaced with a small - sized insensitive electric detonator. The power of the small - sized insensitive electric detonator should be well - matched during the fuze design to ensure that it can reliably detonate the stab detonator or the electric detonator in the intermediate - isolation part during explosive disposal.

[0019] The difficulty of this invention lies in that the inventor needs to be familiar with the requirements of explosive disposal and the structure and operating principle of the fuze.

[0020] The above - mentioned are only the preferred examples of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process substitution made in the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A fuse with the characteristic of explosive disposal after misfire, characterized in that: It includes a fuse body (1), an intermediate detonating mechanism, a booster train (7), N plugging screws (4) and N sealing washers (5). N uniformly distributed radial holes (2) and a flash channel (3) are formed in the fuse body (1). A percussion primer (6) is arranged in the intermediate detonating mechanism; the flash channel (3), the intermediate detonating mechanism and the booster train (7) are coaxially located in the fuse body (1). The radial holes (2) are arranged radially or nearly radially along the radius of the fuse body (1) from the outside to the inside, and finally lead to the inner cavity of the intermediate detonating mechanism through the flash channel (3). A sealing washer (5) is arranged at the outer end of the radial hole (2), and the sealing washer (5) is fixed to the fuse body (1) by a plugging screw (4) to realize the plugging and sealing of the radial hole (2).

2. The fuse with the characteristic of explosive disposal after misfire according to claim 1, wherein: The radial holes (2) are arranged at positions where they are not easily collided and deformed.

3. The fuse with the characteristics of explosive disposal after misfire according to claim 2, characterized in that: The radial holes (2) and the plugging screws (4) adopt clearance thread fit.

4. A fuse having the characteristics of explosive disposal after misfire according to claim 1 or 3, characterized in that: The plugging screws (4) are made of stainless steel or copper alloy.

5. The fuse with the characteristics of explosive disposal after misfire according to claim 4, characterized in that: The numbers of the plugging screws (4), the sealing washers (5) and the radial holes (2) are equal, and are all 2 to 4.

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