An electronic and mechanical composite time fuse for an antiaircraft gun artificial hail suppression and rain enhancement projectile

Abstract

The present invention discloses an electronic-mechanical composite timing fuze for an artificial hail suppression and rain enhancement bomb of an antiaircraft gun, comprising a fuze upper body, a mechanical timing firing mechanism disposed in the cavity of the fuze upper body, a fuze body, a power module, an electronic timing firing mechanism, a flameproof and delayed release safety mechanism, a centrifugal safety mechanism, a recoil safety mechanism, and a detonator. The electronic timing firing mechanism is located between the power module and the flameproof and delayed release safety mechanism, the front end of the detonator is adjacent to the flameproof and delayed release safety mechanism, and the rear end serves as the fuze output end for detonating the explosive charge of the artificial hail suppression and rain enhancement bomb, and the centrifugal safety mechanism and the recoil safety mechanism realize redundant insurance of the flameproof and delayed release safety mechanism. The fuze structure of the present invention is simple, and the fuze space is reasonably and fully utilized. The electronic timing firing mechanism can ensure high-precision firing, and at the same time has the functions of flameproof, redundant insurance, redundant firing, delayed release safety, and self-failure, with high safety and good production reproducibility.

Description

Technical Field

[0001] The invention belongs to the technical field of hail-prevention and rain-increasing bomb fuzes, and in particular relates to an electronic and mechanical composite timing fuze for an anti-aircraft gun artificial hail-prevention and rain-increasing bomb. Background Art

[0002] Small-caliber antiaircraft hail suppression and rain enhancement bombs are used in artificial hail suppression and rain enhancement operations by firing them into the air. Their mechanism is as follows: The bombs are launched into clouds and explode, affecting clouds that are likely to produce hail, preventing hail embryos from developing into hail or causing small ice particles to fall to the ground before they become large hailstones, thereby achieving the purpose of eliminating hail. The explosives contained within the bombs detonate, generating shock waves that influence or alter the dynamics within the clouds, achieving the effect of rain falling from the sound of a cannon. Simultaneously, the silver iodide catalyst contained within the bombs is dispersed by the detonation wave into cumulonimbus clouds, generating a large number of crystal nuclei that transform "rain clouds" into "hail clouds," achieving the purpose of increasing rainfall.

[0003] Currently, artificial rainmaking operations are being conducted in Russia, the United States, Israel, Thailand, and Western European countries, with Russia undertaking the largest-scale artificial hail prevention operations. There are currently no reports of hail prevention and rainfall enhancement using anti-aircraft guns firing artificial hail-prevention and rain-enhancing bombs.

[0004] Currently, domestic hail suppression and rain enhancement munitions have significant safety issues, primarily manifested in the following: large fragments after airburst, potentially injuring personnel. As civilian products, hail suppression and rain enhancement munitions and their fuzes, currently fired from retired small-caliber anti-aircraft guns, are subject to launch and operational environments similar to, or even more stringent than, those of military products. However, their fuze designs do not meet the requirements of GJB373B-2019, the "Fuze Safety Design Guidelines," which must be met by military fuzes. Consequently, incidents of projectile chamber explosions, resulting in gun damage and even fatalities, are frequent. Due to high usage and limited fuze reliability, unexploded ordnance casualties caused by fuze misfires are a near-yearly occurrence. Hail suppression and rain enhancement operations are disaster prevention and mitigation efforts, and economic efficiency is crucial. Therefore, the key technical aspects of fuzes for small-caliber anti-aircraft gun hail suppression and rain enhancement munitions are improving safety and reducing costs. Improved safety includes reducing projectile fragments, lowering the misfire rate of fuzes, preventing re-fires after landing in the event of a misfire in the air, ensuring the safe disposal of duds after a misfire, and meeting the relevant requirements of GJB373B-2019 "Fuze Safety Design Guidelines" (explosion-proof safety, redundant insurance, delayed release of insurance, selection of permitted transfer explosives, and non-released insurance state guarantees, etc.).

[0005] In order to solve these key technical problems, domestic researchers have conducted a lot of related research. For example, the artificial rain bomb fuze design described in Chinese Patent 200620001167.0 extends the air burst time by connecting 2-4 delay cartridges in series. However, these delay cartridges and the ignition sequence mainly composed of them have no isolation design and therefore do not meet the explosion-proof safety requirements. The detonator tube of the artificial rain bomb fuze design described in Chinese Patent 00201925.6 is filled with black powder and Taian, which do not meet the sensitivity requirements of the permitted guide explosives in GJB373B-2019. These designs may accidentally act prematurely without ignition of the ignition mechanism during service handling and launch, causing chamber explosion or service handling explosion accidents, posing a major safety hazard. Although Chinese Patent 200610095035.3 is equipped with a gunpowder delay release safety mechanism and a centrifugal safety mechanism, it only has one centrifugal safety mechanism, rather than the usual pair of symmetrical arrangements. This centrifugal safety mechanism is difficult to independently perform the safety function, does not meet the redundant safety requirements, and is difficult to meet safety and reliability requirements. Furthermore, the fuze's explosion-proof mechanism utilizes a vertical disc-shaped rotor structure, rather than the conventional triangular rotor. This could potentially cause the fuse to release accidentally within the chamber if the delayed-release safety charge accidentally shatters, potentially leading to a chamber explosion. The artificial hail suppression and rain enhancement bombs described in Chinese Patents 200820100586.9 and 201220363259.9 incorporate improvements to fuze safety. However, the slider isolation mechanism designed in 200820100586.9 lacks redundant safety mechanisms and delayed-release safety mechanisms, allowing the fuse to release within the chamber. Furthermore, the explosion-proof safety feature may not fully meet the requirements of relevant national military standards, and safety hazards remain unresolved. While 201220363259.9 utilizes dual ignition and detonation channels to improve operational reliability, each channel lacks an explosion-proof mechanism, posing a significant safety hazard. Chinese Patent 201610952063.6 exhibits a somewhat complex structure, and its use of a powder disc timing mechanism results in poor production reproducibility. Although Chinese patents 201811119414.0 and 201811381314.5 are both equipped with a delayed insurance mechanism to ensure safety and reliability, they both have only one ignition mechanism. When the ignition mechanism fails, the reliability of the action cannot be ensured, and the dud rate will still be high.

[0006] In summary, the problems existing in the prior art are: the anti-aircraft gun hail-proof rain enhancement projectile fuze has low reliability, poor safety, and difficulty in meeting production requirements. Summary of the Invention

[0007] The purpose of the present invention is to provide an electronic and mechanical composite timing fuze for an antiaircraft gun artificial hail suppression and rain enhancement bomb, which comprehensively improves the safety of the fuze of the artificial rain bomb, reduces the misfire rate of the fuze, makes it more reliable, safer, and has better manufacturability.

[0008] The technical solution to achieve the objectives of the present invention is: an electronic and mechanical composite timed fuze for an anti-aircraft gun artificial hail suppression and rain enhancement projectile, comprising a fuze upper body, a mechanical timed firing mechanism disposed within the cavity of the fuze upper body, a fuze body, and, from top to bottom, a power module, an electronic timed firing mechanism, a flame detonator, a flameproof and delayed release safety mechanism, a recoil safety mechanism, and a detonator tube disposed within the cavity of the fuze body; the fuze upper body and detonator tube respectively correspond to the head and tail of the fuze body and are connected by threads, with the rear end of the detonator tube serving as the fuze output terminal for detonating the explosive charge within the projectile of the anti-aircraft gun artificial hail suppression and rain enhancement projectile. The flameproof and delayed release safety mechanism is a ball rotor mechanism that normally maintains the flame detonator in a flameproof state and implements a delayed release safety function after all fuze safety mechanisms have been released, ensuring that the detonator is aligned only after the fuze has flown beyond a safe distance from the muzzle, thus ensuring safety during fuze firing. The electronic timed firing mechanism precisely controls the firing time through an electronic timer, improving the accuracy of the firing time. In addition, the mechanical timing firing mechanism and the electronic timing firing mechanism are independent of each other, achieving redundant firing and improving the reliability of the fuze.

[0009] Compared with the prior art, the present invention has the following significant advantages:

[0010] (1) The two ignition mechanisms are independent of each other and can both ignite the flame detonator, achieving a redundant design of the fuze ignition function, effectively reducing the misfire rate and improving reliability;

[0011] (2) Mechanical timing and electronic timing principles are flexible and adaptable to ballistic environments, and have long timing times. Unlike the gunpowder delay principle, which is limited by the length of the delay charge, they are versatile and particularly suitable for airburst timing of larger caliber ammunition.

[0012] (3) Fully utilize the internal space of the fuze cavity and optimize the structural layout to fully meet the relevant requirements of the "Fuze Safety Design Guidelines", including explosion-proof, redundant fuses, delayed arming, non-armed fuse state guarantee, selection of permissible transfer explosives, and self-neutralization;

[0013] (4) The structure is simple, and most parts are of a rotating body configuration, which is easy to process and inspect, and has low manufacturing cost.

[0014] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The invention discloses an axial cross-sectional view of an electronic and mechanical composite timing fuze for an antiaircraft gun artificial hail suppression and rain enhancement projectile.

[0016] Figure 2 The figure is an AA cross-sectional view of the electronic and mechanical composite timing fuze of the antiaircraft gun artificial hail suppression and rain enhancement bomb of the present invention.

[0017] Figure 3 It is a cross-sectional view of the power module of the present invention.

[0018] Figure 4 It is a cross-sectional view of the power module of the present invention taken along the AA direction.

[0019] Figure 5 It is an axonometric view of the split ring of the present invention.

[0020] In the figure, 1 is the upper body of the fuze, 2 is the mechanical timed firing mechanism, 3 is the fuze body, 4 is the power module, 5 is the electronic timed firing mechanism, 6 is the paper gasket, 7 is the flame detonator, 8 is the explosion-proof and delayed release safety mechanism, 9 is the recoil safety mechanism, 10 is the booster tube; 20 is the needle detonator, 21 is the split ring, 22 is the bracket, 23 is the centrifugal ball, 24 is the firing pin, 25 is the sleeve, 26 is the first spring, 27 is the second spring, 28 is the pressure screw, 29 is the guide tube ; 41 is the upper cover, 42 is the base, 43 is the battery, 44 is the connecting spring, 45 is the bottom cover, 46 is the electrode sheet, 47 is the spring sheet; 81 is the centrifugal safety mechanism, 811 is the collar, 812 is the centrifugal spring, 813 is the centrifugal cylinder, 82 is the ball cover, 83 is the ball rotor, 831 is the isolation ball, 832 is the first detonating tube, 84 is the ball seat; 91 is the second detonating tube, 92 is the support tube; 101 is the detonating tube shell, 102 is the reinforcement cap, and 103 is the explosive. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0023] In the present invention, references to "first," "second," and the like are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referenced. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0024] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can refer to fixed connection, detachable connection, or integration; "connection" can refer to mechanical connection or electrical connection. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The following will further introduce the specific implementation methods, as well as the technical difficulties and inventive points of this invention in combination with this design example.

[0027] Combine Figures 1 to 5 An electronic and mechanical composite timing fuze for an anti-aircraft gun artificial hail suppression and rain enhancement projectile comprises a fuze upper body 1, a mechanical timing ignition mechanism 2 disposed in the cavity of the fuze upper body 1, a fuze body 3, and a power supply module 4, an electronic timing ignition mechanism 5, a flame detonator 7, a flameproof and delayed release safety mechanism 8, a recoil safety mechanism 9 and a detonator tube 10 disposed in the cavity of the fuze body 3 from top to bottom; the fuze upper body 1 and the detonator tube 10 correspond to the head and tail of the fuze body 1 respectively and are connected by threads, the rear end of the detonator tube 10 serving as the fuze output end for detonating the explosive charge in the projectile body of the anti-aircraft gun artificial hail suppression and rain enhancement projectile.

[0028] The mechanical timing firing mechanism 2 includes a needle piercing detonator 20, a split ring 21, a bracket 22, a centrifugal ball 23, a firing pin 24, a sleeve 25, a first spring 26, a second spring 27, a pressure screw 28, and a guide cylinder 29. Along the central axis of the upper body 1 of the fuze, three-step stepped blind holes with gradually decreasing diameters are provided from bottom to top, namely the third-step hole, the second-step hole, and the first-step hole in sequence; the needle piercing input end of the needle piercing detonator 20 is placed downward in the first-step hole of the upper body 1 of the fuze and fixed in the form of spot rivets; the bracket 22 includes a first cylinder, a second cylinder, and a third cylinder with increasing diameters from top to bottom, and a two-step stepped through hole is provided from top to bottom along the central axis of the bracket 22, namely the fourth-step hole and the fifth-step hole in sequence, and the circumferential outer wall of the second cylinder of the bracket 22 is tightly The inner wall of the second step hole of the upper body 1 of the fuze is adhered to, and the circumferential outer wall of the third cylinder is adhered to the inner wall of the third step hole of the upper body 1 of the fuze; the split ring 21 is a cylindrical thin shell structure with a two-step stepped through hole in the middle and an opening on one side. The two-step stepped through hole is divided into a sixth step hole and a seventh step hole in sequence from top to bottom along the axis of the split ring 21. The upper end face of the split ring 21 is adhered to the upper surface of the second step hole of the upper body 1 of the fuze, that is, the bottom end face of the hole, and its lower annular surface is adhered to the upper end face of the second cylinder of the bracket 22. The inner diameter of the seventh step hole of the split ring 21 is the same as that of the bracket 22. The outer diameters of the first cylinders are the same; the firing pin 24 includes a first cylinder and a second cylinder with increasing diameters from top to bottom, wherein the first cylinder extends into the fourth step hole of the bracket 22 and the upper end face is close to the stepped end face of the split ring 21, and a three-step stepped blind hole is opened upward from the center of the bottom face of the second cylinder of the firing pin 24, and the three-step stepped holes are the eighth step hole, the ninth step hole and the tenth step hole from top to bottom along the axis of the firing pin 24, and a plurality of radial first blind holes are opened along the outer wall surface of the upper end of the second cylinder of the firing pin (24); the plurality of centrifugal balls 23 are placed on the firing pin 24 is arranged in the corresponding first blind hole of the second cylindrical upper section; the first spring 26 is axially arranged in the cylindrical cavity of the sleeve 25, the upper end of the first spring 26 is extended into the ninth step hole of the firing pin 24 together with the sleeve 25, the lower end is against the central annular surface of the pressure screw 28, and a guide cylinder 29 riveted on the pressure screw 28 is provided at the lower end thereof, which is used to ensure the core shaft guidance of the lower end of the first spring 26; the upper end of the second spring 27 is against the upper ring end surface of the tenth step hole of the firing pin 24, and the lower end thereof is against the central annular surface of the pressure screw 28.

[0029] A central fire hole is provided along the axis of the power module 4 and the electronic timing firing mechanism 5 from top to bottom, namely a first central fire hole and a second central fire hole, and the two fire holes are coaxial. A flame detonator 7 is provided in the central chamber at the bottom of the electronic timing firing mechanism 5 and directly below the second central fire hole. An annular paper gasket 6 is provided above the flame detonator 7 for adjusting the height gap generated after the flame detonator (7) is installed. The detonator can be independently triggered by either the electronic timing firing mechanism 5 or the mechanical timing firing mechanism 3, and is used to detonate the explosive charge (first detonator 832) in the flameproof and delayed release safety mechanism 8.

[0030] The electronic timed ignition mechanism 5, i.e., the electronic timed ignition module, includes a first electric explosion element, i.e., an electric ignition head, which is used to realize capacitor energy storage, timing, drive the electric ignition head to ignite, and output high-temperature and high-pressure flame impulse after the electric ignition head ignites. This is an existing technology.

[0031] The explosion-proof and delayed-release safety mechanism 8, namely the ball rotor safety and release mechanism and its centrifugal safety mechanism, comprises a ball cover 82, a ball rotor 83, a ball seat 84, and three centrifugal safety mechanisms 81. The upper portion of the ball seat 84 is riveted to the lower end of the ball cover 82, forming a component that houses and moves the ball rotor 83. The ball rotor 83 comprises an isolation ball 831 and two identical first detonating tubes 832. Each isolation ball 831 is provided with a second transverse blind hole on either side, and a fourth blind hole at its lower end. The two second transverse blind holes are identical in size and shape, coaxially positioned, with their axes passing through the center of the ball. Each first detonating tube 832 is located within a second transverse blind hole. The input and output ends of the two first detonating tubes 832 are also simultaneously connected. A third central explosion-transmitting hole is located at the axis of each second transverse blind hole, connecting the two second transverse blind holes. A centrifugal safety mechanism 81 is located above the second blind hole in the isolation ball 831 and positioned horizontally within the upper left cylindrical cavity of the ball cover. Its centrifugal cylinder 813, driven by a centrifugal spring 812, engages the outer sides of crescent-shaped notches evenly spaced along the axis of the isolation ball 831, providing a safety feature for the ball rotor 83. Three centrifugal safety mechanisms 81 are evenly spaced around the circumference of the isolation ball 831.

[0032] The detonator tube 10 comprises a detonator tube shell 101, a reinforcing cap 102, and explosive charge 103. A blind hole with an upward opening is located in the center of the reinforcing cap 102. A recoil safety mechanism 9 is located within this blind hole. This recoil safety mechanism 9 comprises a second detonator tube 91 and a support tube 92. The front end of the second detonator tube 91 protrudes from the upper end surface of the detonator tube 10 and fits into a fourth blind hole at the lower end of the isolation ball 831. The support tube 92 is located directly below and supports the second detonator tube 91. Together, the support tube 92 provides another safety feature for the ball rotor 82, namely the recoil safety feature.

[0033] During the service handling phase, any impact or vibration that may occur, including drops and transport vibrations, will not cause the fuze to change its assembled state. The recoil safety mechanism 9 and the three centrifugal safety mechanisms 81 in the fuze are all in the safety position, ensuring that the flameproof and delayed release safety mechanism 8 is in a flameproof state. At this point, even if the flame detonator 7 in the fuze accidentally ignites and explodes, it will not detonate the first detonating tube 832, the second detonating tube 91, or the booster tube 10, thus ensuring safety during the service handling phase.

[0034] In the assembled state, the first spring 26 and the second spring 27 are both in a pre-compressed state, and the front end of the firing pin 24 of the mechanical timing firing mechanism 2 is tightly against the lower end surface of the split ring 21. The split ring 21 can resist the impact force generated by vibration, shock, falling and loading process, so that the firing pin 24 will not accidentally pierce the detonator 20.

[0035] Even if the needle detonator 20 accidentally ignites and explodes during handling, storage, loading, or firing, detonating the flame detonator 7 below it, due to the structural misalignment and functional explosion-proof state of the isolation ball 831, the flame detonator 7 will only explode above the isolation ball 831, in the lower center chamber of the electronic timed firing mechanism 5. The fuze will enter a fire-proof state, and the detonation will be blocked by the isolation ball 831 and cannot be transmitted downward, so it will not detonate the explosive booster 103 below it, thereby ensuring the explosion-proof safety of the fuze and the safety of explosives handling. The power design of the needle detonator 20 and the structure and strength design of the fuze upper body 1 ensure that if the needle detonator 20 accidentally ignites and explodes, the fuze, namely the fuze upper body 1, will not undergo structural disintegration and will not produce dangerous fragments externally, thus ensuring explosion-proof safety.

[0036] Furthermore, if the fuze misfires accidentally in mid-air, for example, if the flameproof and delayed release safety mechanism 8 is not released or is not fully released (meaning the ball rotor is not aligned or is not fully aligned), the flame detonator 7 can still be triggered by the two-way firing mechanism, but the fuze enters a self-destructing (fire-free) state, and the unexploded ordnance formed at this time is safe.

[0037] The working process of the electronic and mechanical composite time fuze of the antiaircraft gun artificial hail suppression and rain enhancement projectile described in the present invention is as follows:

[0038] When the projectile is fired, the recoil forces the support tube 92 to collapse, causing the second detonating tube 91 to move downward until the portion of the second detonating tube 91 protruding from the booster tube 10 is completely clear of the fourth blind hole at the lower end of the isolation ball 831, releasing the recoil safety for the isolation ball 831. Simultaneously, the firing pin 24 within the fuze body 3, carrying the centrifugal ball 23, also moves downward under the action of recoil to the central annular surface of the compression screw 28. Thereafter, the centrifugal ball 23 is flung radially outward under the action of centrifugal force, resting against the inner inclined surface at the lower end of the support 22. As the projectile approaches the muzzle, the centrifugal ball 23 locks the firing pin 24 in its bottomed position via the inner inclined surface at the lower end of the support 22, placing the mechanical timed firing mechanism in a ready state. As the projectile approaches the muzzle, the split ring 21, under the action of centrifugal torque, opens and withdraws to the wall of its chamber, clearing the axial path for the firing pin 24. The three centrifugal cylinders 813, which were stuck outside the crescent-shaped notch of isolation ball 831, also overcame the resistance of centrifugal springs 812 and retracted, releasing the centrifugal safety lock on isolation ball 831 and releasing ball rotor 83. However, due to the recoil, ball rotor 83 remained seated on ball seat 84, and the resulting friction and torque kept ball rotor 83 in the assembled position.

[0039] As the projectile exits the muzzle nearing the end of its aftereffect period, the recoil gradually decreases and approaches zero. During this process, the centrifugal force acting on the ball rotor 83 overcomes the centrifugal, recoil, or creeping friction torques and, with the aid of gyroscopic torque, gradually rotates to the right. This aligns the first detonating tube 832 with the flame detonator 7 and the second detonating tube 91. The detonation sequence begins, the fuze arming, and the projectile enters the ready state. As the ball rotor's rotation progresses, the projectile passes a safe distance, achieving a delayed arming of the safety, ensuring safe firing of the gun.

[0040] The principle of the mechanical timed firing mechanism is as follows: the projectile's rotational speed gradually decays as it travels along its outer trajectory. At a predetermined moment (e.g., 20 seconds), when the centrifugal force of the centrifugal ball 23, acting on the inner annular slope at the lower end of the bracket 22, is insufficient in its axial component to overcome the resistance of the first and second springs 26 and 27, the firing pin 24, under the resistance of the first and second springs 26 and 27, moves upward along its axis, retracting the centrifugal ball 23 and piercing the needle detonator 20, causing it to ignite and explode. This blast penetrates the firing pin tip of the firing pin 24, allowing the high-temperature gaseous products generated by the explosion to pass through the first and second central ignition holes, igniting the flame detonator 7. This in turn detonates the two first detonating tubes 832 and the second detonating tube 91 that follow, which in turn detonates the booster charge 103 in the booster tube 10, completing the detonation of the fuze.

[0041] The electronic timed firing mechanism operates as follows: When the projectile approaches the muzzle within the chamber, the timer switch of the electronic timed firing mechanism 5 is turned on, starting the timer. Once the projectile reaches a predetermined time (e.g., 20 seconds), the electronic timed firing mechanism 5 automatically ignites. The electric ignition head within it emits a flame, which ignites the flame detonator 7 through the first and second central flame transfer holes. This in turn detonates the two first detonating tubes 832 and the second detonating tube 91 that follow it, which in turn detonates the booster charge 103 in the booster tube 10, completing the detonation of the fuze.

[0042] The mechanical timing firing mechanism and the electronic timing firing mechanism are independent of each other and serve as backup for each other, which helps to improve reliability.

Claims

1. An electronic and mechanical composite timing fuze for an anti-aircraft gun artificial hail suppression and rain enhancement bomb, comprising a fuze upper body (1), a mechanical timing firing mechanism (2) disposed in a cavity of the fuze upper body (1), a fuze body (3), and a power supply module (4), an electronic timing firing mechanism (5), a flame detonator (7), an explosion-proof and delayed release safety mechanism (8), a recoil safety mechanism (9) and a detonator (10) disposed in the cavity of the fuze body (3) from top to bottom; the fuze upper body (1) and the detonator (10) respectively correspond to the head and tail of the fuze body (3) and are connected by threads; the rear end of the detonator (10) serves as a fuze output end for detonating explosive charge of the anti-aircraft gun artificial hail suppression and rain enhancement bomb; the mechanical timing firing mechanism (2) and the electronic timing firing mechanism (5) are designed in parallel, which is conducive to improving reliability; The mechanical timing firing mechanism (2) comprises a needle piercing detonator (20), a split ring (21), a bracket (22), a centrifugal ball (23), a firing pin (24), a sleeve (25), a first spring (26), a second spring (27), a pressure screw (28) and a guide tube (29); the split ring (21), the fuze upper body (1) and the bracket (22) constitute a centrifugal safety mechanism of the mechanical timing firing mechanism (2); three-step stepped blind holes with gradually decreasing diameters are provided from bottom to top along the central axis of the fuze upper body (1), which are the third-step hole, the second-step hole and the first-step hole in sequence; the needle piercing detonator (20) is placed in the first-step hole and fixed by a spot riveting method; The bracket (22) includes a first cylinder, a second cylinder and a third cylinder with increasing diameters from top to bottom, and a two-step stepped hole is provided along the central axis of the bracket (22) from top to bottom, which are the fourth step hole and the fifth step hole in sequence. The circumferential outer wall of the second cylinder of the bracket (22) is in close contact with the inner wall of the second step hole of the fuze upper body (1), and the circumferential outer wall of the third cylinder is in close contact with the inner wall of the third step hole of the fuze upper body (1); the split ring (21) is a cylindrical thin shell with a two-step stepped through hole in the middle and an opening on one side, wherein the two-step stepped through hole is in sequence the sixth step hole and the seventh step hole from top to bottom along the axis of the split ring (21), and the upper end face of the split ring (21) is in close contact with the inner wall of the third step hole of the fuze upper body (1). The upper surface of the second-step hole, i.e., the bottom end face of the hole, and the lower end face thereof are in close contact with the upper end face of the second cylinder of the bracket (22), and the aperture of the seventh-step hole of the split ring (21) is the same as the diameter of the first cylinder of the bracket (22); the firing pin (24) comprises a first cylinder and a second cylinder with increasing diameters from top to bottom, wherein the first cylinder extends into the fourth-step hole of the bracket (22) and the upper end face thereof is in close contact with the annular surface of the seventh-step hole of the split ring (21), and a three-step stepped hole is opened from the center of the bottom face of the second cylinder of the firing pin (24) to the first cylinder, and the three-step stepped hole is sequentially the eighth-step hole, the ninth-step hole and the tenth-step hole from top to bottom along the axis of the firing pin (24), and the second cylinder of the firing pin (24) is in close contact with the annular surface of the seventh-step hole. The outer wall surface of the upper end is provided with a plurality of radial first blind holes; a centrifugal ball (23) is provided in each first blind hole; the first spring (26) is axially arranged in the sleeve (25), the upper end of the first spring (26) and the sleeve (25) extend into the ninth step hole of the firing pin (24), the lower end of the first spring (26) abuts against the central annular surface of the pressure screw (28), and a guide cylinder (29) riveted on the pressure screw (28) is provided at the lower end thereof, serving as a core shaft guide for the lower end of the first spring (26); the upper end of the second spring (27) abuts against the upper ring end surface of the tenth step hole of the firing pin (24), and the lower end thereof abuts against the central annular surface of the pressure screw (28); The explosion-proof and delayed release safety mechanism (8) is a ball rotor safety and release safety mechanism, comprising a ball cover (82), a ball rotor (83), a ball seat (84) and three centrifugal safety mechanisms (81); the upper portion of the ball seat (84) is riveted, i.e., the end thereof is fixed to the lower end of the ball cover (82), and together they constitute a housing and movement chamber for the ball rotor (83) component, and the ball rotor (83) component comprises an isolation ball (831) and two first detonating tubes (832); a transverse second blind hole is provided on each of the left and right sides of the isolation ball (831), and a fourth blind hole is provided on the lower end of the isolation ball (831); the two transverse second blind holes are identical in size and shape, and their positions are coaxial and their axes are aligned. A first detonating tube (832) is provided in each transverse second blind hole through the center of the ball. The input ends of the two first detonating tubes (832) are also output ends. A third central fire transmission hole is coaxially provided between the two transverse second blind holes to communicate with the two transverse second blind holes. Three radial third blind holes are evenly provided on the circumference of the ball cover above the transverse second blind hole of the isolation ball (831). A centrifugal safety mechanism (81) is provided in each radial third blind hole. The centrifugal cylinder (813) thereof is clamped on the outside of three crescent-shaped notches evenly distributed along the axis of the fuse of the isolation ball (831) under the action of the centrifugal spring (812), thereby realizing a safety for the ball rotor (83), namely, the centrifugal safety mechanism. Along the central axis of the power module (4) and the electronic timing firing mechanism (5), there are provided a coaxial and equal-diameter central fire transmission hole from top to bottom, which are respectively a first central fire transmission hole and a second central fire transmission hole; a central chamber is provided directly below the second central fire transmission hole of the electronic timing firing mechanism (5) for accommodating a flame detonator (7); an annular paper gasket (6) is provided above the flame detonator (7) for adjusting the height gap generated after the flame detonator (7) is installed; the detonator can be independently triggered by either the electronic timing firing mechanism (5) or the mechanical timing firing mechanism (2) to detonate the first detonator tube (832) in the flameproof and delayed release safety mechanism (8).

2. The electronic and mechanical composite time fuse for an antiaircraft gun artificial hail suppression and rain enhancement projectile according to claim 1, characterized in that: The first central fire transmission hole, the second central fire transmission hole and the third central fire transmission hole constitute the fire transmission channel of the fuze.

3. The electronic and mechanical composite time fuse for an antiaircraft gun artificial hail suppression and rain enhancement projectile according to claim 2, characterized in that: The detonator tube (10) includes a detonator tube shell (101), a reinforcing cap (102) and a detonating charge (103); a cylindrical cavity is provided in the middle of the axis of the detonator tube (10), in which a recoil safety mechanism (9) is built. The recoil safety mechanism (9) includes a second detonator tube (91) and a support tube (92), wherein the front end portion of the second detonator tube (91) protrudes from the upper end surface of the detonator tube (10), and the protruding portion is inserted into the fourth blind hole at the lower end of the isolation ball (831); the support tube (92) is located directly below the second detonator tube (91) and supports the second detonator tube (91). The two together constitute another insurance for the ball rotor (83), namely the recoil safety.

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