CN116839425A - Hail-suppression and rain-enhancement bomb double-path ignition flame-proof fuze - Google Patents

Abstract

The invention discloses a dual-circuit firing and explosion-proof fuze for anti-hail and rain-increasing bombs, which belongs to the technical field of artillery shell fuzes. The road ignition mechanism is located at the front of the inner cavity of the fuze body, the delay mechanism is located between the dual-channel ignition mechanism and the explosion-proof mechanism, and the detonation tube is located at the rear end of the fuze body; the explosion-proof mechanism includes a horizontal rotor and a rotor base. There is a fire transmission hole in the middle of the rotor seat, and a rotor limiting centrifugal mechanism is installed in the rotor base. The rotor can block the fire transmission hole in the muzzle to ensure the safety of the fuze in the chamber and avoid the fuze from igniting, causing the fuze to fail. Early explosion and near explosion; after exiting the muzzle, the limit centrifugal mechanism releases the limit on the rotor and exposes the flame transfer hole. After ignition, the detonator tube can be ignited through the flame transfer hole, and finally the charge body is detonated. The invention further improves the reliability and safety of the fuze through dual-channel ignition delay and explosion-proofing, and at the same time controls the size of the fragments.

Description

A kind of anti-hail and rain-increasing bomb dual-channel fire and explosion-proof fuze

Technical field

The invention belongs to the technical field of artillery shell fuzes, and particularly relates to a dual-channel fire and explosion-proof fuze for anti-hail and rain-increasing bombs.

Background technique

Artificial anti-hail bombs, referred to as artificial rain bombs, are used to prevent and mitigate natural disasters such as drought and hail. At present, the failure modes of 37mm artificial hail-proof and rain-enhancing bombs are mainly fuze misfire and large projectile fragments, which are the main causes of harm to ground personnel, houses, equipment, etc. In order to reduce the harm caused by 37 people after rain bomb operations, the government For human rain bomb products, it is required that the fuze misfire rate is less than or equal to 1/1000.

However, the existing man-made rain bomb fuze does not have a flameproof mechanism and the blind fire rate does not meet the requirements of the document. Without a flameproof mechanism, it will cause a sudden fire when the fuze comes into contact with the safety, resulting in fuze failure, early explosion, and near explosion, resulting in Unexploded shrapnel causes serious harm to people, buildings, equipment, etc. on the ground. In order to adapt to market demand and reduce the misfire rate of the fuze, researchers have designed and developed a new type of anti-hail and rain-increasing bomb dual-fire explosion-proof fuze.

Contents of the invention

The purpose of the present invention is to provide a dual-circuit fire and explosion-proof fuze for anti-hail and rain-increasing bombs, aiming to solve the problem in the prior art that the fuze of human rain bombs without an explosion-proof mechanism will cause a sudden fire, resulting in fuze failure, early explosion, and near explosion. As well as the technical problem that unexploded shrapnel is seriously harmful.

In order to solve the above technical problems, the technical solutions adopted by the present invention are:

A dual-circuit firing and explosion-proof fuze for anti-hail and rain-increasing bombs, including a fuze body and a dual-circuit firing mechanism, a delay mechanism, a flameproof mechanism and a detonation tube inside the fuze body. The fuze body is hollow with one end blocked. Shell, the dual-path ignition mechanism is arranged at the front of the inner cavity of the fuze body, the delay mechanism is arranged between the dual-path ignition mechanism and the explosion-proof mechanism, and the detonation tube is arranged at the rear end of the fuze body , used to detonate the charge body; the explosion-proof mechanism includes a horizontal rotor and a rotor seat. The middle part of the rotor seat is provided with a fire transmission hole. The rotor seat is equipped with a rotor limiting centrifugal mechanism for use in the gun. The rotor is limited in the mouth and the fire hole is blocked. After exiting the muzzle, the limitation on the rotor is released and the fire hole is exposed.

Preferably, the dual-circuit ignition mechanism includes an ignition body, a side firing pin and a flash cap. The ignition body is provided with two ignition holes. The ignition hole is a through hole that penetrates the ignition body up and down. The tip of the side firing pin is upward. It is arranged at the bottom of the ignition hole, the side firing pin is coated with a spring, the flash cap is arranged on the top of the spring, and the top hole of the ignition hole is screwed with a flash cap screw plug; the bottom opening of the ignition hole is connected with the delay mechanism Corresponding to the fire transmission channel; the side bottom of the ignition body is provided with a pressure relief hole penetrating the ignition hole.

Preferably, the delay mechanism includes a medicine tray and an upper paper pad at its upper end and a lower paper pad at its lower end. The upper and lower surfaces of the medicine tray and its interior are provided with fire transmission channels capable of filling the delay agent, so The bottom of the medicine tray is provided with a backing plate. The upper end of the fire transmission channel in the medicine tray is connected to the upper paper pad and the fire transmission hole of the dual-way ignition mechanism. The lower end of the fire transmission channel in the medicine tray is connected to the lower paper pad and The fire transmission holes on the backing plate are connected to each other, and a medicine tank for pressing the delayed agent and communicating with the fire transmission channel is provided at the center of the bottom of the medicine tray, which is used to ignite the explosion-proof mechanism below it; the medicine tray, The upper paper pad, lower paper pad and backing plate are connected to the dual-circuit firing mechanism through the positioning structure.

Preferably, the positioning structure includes a plurality of positioning pins, the plurality of positioning pins are radially arranged around the fire transmission holes in the middle of the pad, and the lower ends of the positioning pins are inserted into the mounting holes on the top of the pad through adhesive. The upper end of the positioning pin is inserted into the bottom positioning hole of the dual-way ignition mechanism.

Preferably, the upper and lower surfaces of the medicine tray are provided with annular fire transmission channels, and the inside of the medicine tray is provided with an intermediate fire transmission channel that connects the upper and lower annular fire transmission channels; the medicine tank is connected to the annular fire transmission channels through branch grooves. .

Preferably, the thickness of the medicine tray is 7mm; the fuze body, medicine tray, backing plate and the ignition body of the dual-way ignition mechanism are all made of 2A12 aluminum alloy material; the pressure of the dual-way ignition mechanism and the delay mechanism is 4.5±0.5Mpa load machine press together.

Preferably, one side of the rotor seat is provided with an eccentric sinking groove for placing the rotor, and the middle part of the eccentric sinking groove is rotationally matched with the rotor; the middle part of the rotor seat is provided with a fire transmission hole that penetrates the bottom of the eccentric sinking groove up and down; The rotor limiting centrifugal mechanism is arranged on the side of the rotor seat. The rotor limiting centrifugal mechanism includes a centrifugal pin, a spring and a pin cover. The side of the rotor base is provided with a pin hole, and the pin hole is arranged opposite to the rotor. The pin hole is coplanar with the middle longitudinal section of the eccentric sinking groove and coincides with the diameter of the rotor seat; the centrifugal pin is radially arranged in the pin hole, and the bottom of the pin hole is provided with an opening toward the eccentric sinking groove, The bottom of the centrifugal pin extends to the outside of the opening and matches with the slot at the bottom of the rotor; the spring is disposed between the centrifugal pin and the pin cover, and the pin cover is disposed in the outer opening of the pin hole.

Preferably, the rotor is a special-shaped rotary part, and the middle part of the rotor is provided with an axis hole that rotates with the rotor shaft in the middle part of the eccentric sinking groove. The rotor includes a fan-shaped part and a rectangular part, and the eccentric sinking groove is circular, The arc-shaped edges of the sector-shaped part and the rectangular part match the circumferential edge of the eccentric sinking groove, and the center of the circle where the arc-shaped edges of the sector-shaped part and the rectangular part are located is concentric with the rotor axis; the rectangular part is provided with a The flame propagation hole corresponds to the explosion propagation hole, and the sector-shaped part is a solid body; a safety pin is provided on the outer surface of the eccentric sinking groove, and the safety pin is arranged on the straight side of the rectangular part and close to the rotor seat The outer edge is used to align the axis of the blast hole and the flame hole after the rotor rotates.

Preferably, the rotor base and the top of the rotor are provided with a cover plate, and the center hole of the cover plate corresponds to the flame transmission hole; the cover plate is connected to the rotor base through screws, and the center hole of the cover plate is equipped with a There is a detonator, which is arranged directly above the fire hole in the middle of the rotor seat; the cover plate and the rotor seat are connected to the delay mechanism.

Preferably, the open end of the fuze body is connected to the connecting screw cover, and the middle part of the connecting screw cover is provided with a through hole that tightly fits the detonating tube.

The beneficial effects of adopting the above technical solution are: Compared with the existing technology, the present invention adopts dual-path ignition, extends the detonation time through a delay mechanism, and the horizontal rotor is limited on the rotor seat through the rotor limiting centrifugal mechanism. It can limit the position of the rotor and block the fire transmission hole to ensure the safety of the fuze in the chamber and avoid the fuze from igniting, causing fuze failure, early explosion, and near explosion; after exiting the muzzle, the limit centrifugal mechanism releases the restriction on the rotor. position and exposes the flame transfer hole. After ignition, the detonator tube can be ignited through the flame transfer hole, and finally the charge body is detonated. The invention adopts dual-channel ignition delay and explosion-proofing to further improve the reliability and safety of the fuze and at the same time control the size of the fragments.

Description of the drawings

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Figure 1 is a schematic structural diagram of a dual-channel fire and explosion-proof fuse for anti-hail and rain-increasing bombs provided by an embodiment of the present invention;

Figure 2 is a schematic structural diagram of the dual-circuit firing mechanism in Figure 1;

Figure 3 is a schematic structural diagram of the delay mechanism in Figure 1;

Figure 4 is an assembly diagram of the dual-circuit ignition mechanism and the delay mechanism in the embodiment of the present utility model after they are pressed together;

Figure 5 is a schematic structural diagram of the explosion-proof mechanism in Figure 1;

Figure 6 is a schematic structural diagram of the pin hole on the side of the rotor seat in Figure 5;

Figure 7 is a top view of the flameproof mechanism in Figure 5 with the rotor removed;

Figure 8 is a top view of the flameproof mechanism in Figure 5;

Figure 9 is a top view of Figure 8 with the cover plate removed;

In the picture: 1-fuse body, 2-guide detonator, 3-connecting screw cover, 4-fire hole, 5-detonator;

100-dual ignition mechanism, 101-ignition body, 102-side firing pin, 103-flash cap, 104-ignition hole, 105-spring, 106-flash cap screw plug, 107-pressure relief hole;

200-delay mechanism, 201-medicine tray, 202-upper paper pad, 203-lower paper pad, 204-fire transmission channel, 205-pad; 206-delay agent, 207-positioning pin;

300-flameproof mechanism, 301-rotor seat, 302-rotor, 312-sector part, 322-rectangular part; 303-eccentric sinking groove, 304-rotor shaft, 305-axis hole, 306-centrifugal pin, 307-spring, 308-pin cover, 309-pin hole, 310-explosion hole, 311-safety pin, 312-cover plate, 313-screw, 314-limit pin, 315-limit hole, 316-safety pin hole, 317- Threaded hole.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some 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 efforts fall within the scope of protection of the present invention.

Please refer to Figure 1. A dual-channel fire and explosion-proof fuze for anti-hail and rain-increasing bombs provided by an embodiment of the present invention includes a fuze body 1 and a dual-channel firing mechanism 100, a delay mechanism 200, an explosion-proof mechanism 300 and a conductor inside the fuze body 1. Squib 2, the fuze body 1 is a hollow shell with one end sealed, the dual-path ignition mechanism 100 is disposed at the front of the inner cavity of the fuze body 1, and the delay mechanism 200 is disposed at the dual-path ignition mechanism 100 and the flameproof mechanism 300; the flameproof mechanism 300 includes a horizontal rotor 302 and a rotor base 301. The rotor base 301 is provided with a fire hole 4 in the middle, and a rotor limiting centrifugal mechanism is provided in the rotor base 301. , used to limit the position of the rotor 302 in the muzzle and block the fire hole. After exiting the muzzle, the limit on the rotor 302 is released and the fire hole 4 is exposed; the guide detonator 2 is arranged at the rear of the fuze body 1 end, used to detonate the charge body. The invention adopts dual-circuit ignition, extends the detonation time through the delay mechanism, and the horizontal rotor ensures the safety of the fuze in the chamber through the rotor limiting centrifugal mechanism, avoids the fuze from igniting, causing fuze failure, early explosion, and near explosion, and improves the efficiency of the fuze. reliability and security.

During specific production, the open end of the fuze body 1 is connected to the connecting screw cover 3, and the middle part of the connecting screw cover 3 is provided with a through hole that tightly fits the conductor detonator 2. During assembly, after the connecting screw cap is screwed into the fuze body, a sealing lead ring is placed in the gap between the bottom of the connecting screw cap and the contact part of the fuze body to ensure the internal sealing of the fuze. By reasonably optimizing the structure and size of the fuze body, there is a cavity at the bottom of the blocked end, and the cavity location and connection strength are optimized to ensure that the maximum axial stress of the fuze body is within the allowable stress when the shell is launched. Within the range, the second is to facilitate the fragmentation performance of the fuze body during explosion, so as to achieve the purpose of reducing fragments after explosion.

In a specific embodiment of the present invention, as shown in Figure 2, the dual-path ignition mechanism 100 includes an ignition body 101, a side firing pin 102 and a flash cap 103. The ignition body 101 is provided with two ignition holes 104. The ignition hole 104 is a through hole that penetrates the ignition body 101 up and down. The needle tip of the side firing pin 102 is set upward at the bottom of the ignition hole 104. The side firing pin 102 is coated with the spring 105, and the flash cap 103 is set on the spring 105. At the top, the top opening of the ignition hole 104 is screwed with a flash cap screw plug 106; the bottom opening of the ignition hole 104 corresponds to the fire transmission channel of the delay mechanism 200; the side bottom of the ignition body 101 is provided with The pressure relief hole 107 passes through the ignition hole 104. This structure adopts the principle of dual-circuit firing. The side firing pin spring compresses the spring under the action of huge recoil force to deform it. The side firing pin triggers the flash cap, and then the fire is successful.

Two sets of subsystems for a fuze are composed of two sets of side firing pins and flash caps, explosion-proof mechanisms, and conducting detonators. Reliability of a single subsystem consisting of a side firing pin, flash cap, explosion-proof mechanism, and conducting detonators. It is 97%. If two sets of subsystems are assembled in parallel, the probability of two sets of subsystems misfiring at the same time will become very small.

Suppose the reliability of the two subsystems is set to Rs, and the reliability of the subsystem is set to Ri. The system reliability Rs is expressed by the following mathematical model calculation formula:

Rs=1-(1-R1)(1-R2)……(1-Rn)

If two identical subsystems of the same type of fuze are connected in parallel, then R1=R2=R, n=2. The reliability of this fuze system can be calculated using the formula:

Rs=1-(1-R)2=0.9991=99.91%

That is, after two subsystems with the same reliability of 97% are used in a fuze, the reliability of the fuze can be increased to 99.91%.

Therefore, the industry requires that the indicator "fuse misfire rate is less than or equal to 1/1000" can be achieved through strict quality control.

As a preferred structure, as shown in Figure 2, the ignition body 101 is a tube body with an upper opening, a boss is provided at the bottom of the ignition body 101, and the pressure relief hole 107 is provided at the root of the boss; The ignition holes 104 are symmetrically arranged in the side wall interlayer of the ignition body 101 . The ignition body adopting this structure can on the one hand reduce the weight of the ignition mechanism, on the other hand it can facilitate the release of the pressure after ignition to the interior of the fuze body, and at the same time reduce the fragmentation mass of the head of the fuze body.

In a specific embodiment of the present invention, as shown in Figure 3, the delay mechanism 200 includes a medicine tray 201 and an upper paper pad 202 at its upper end and a lower paper pad 203 at its lower end. The upper and lower surfaces of the medicine tray 201 There is a fire transmission channel 204 inside which can be filled with delaying agent. The bottom of the medicine tray 201 is provided with a backing plate 205. The upper end of the fire transmission channel 204 in the medicine tray 201 is connected with the upper paper pad 202 and double The fire transmission hole 4 of the road ignition mechanism 100 is connected. The lower end of the fire transmission channel 204 in the medicine tray 201 is connected with the fire transmission hole 4 on the lower paper pad 203 and the backing plate 205. The bottom center of the medicine tray 201 is set There is a medicine tank that presses the delay medicine 206 and is connected to the fire transmission channel 204, which is used to ignite the explosion-proof mechanism 300 below; the medicine tray 201, the upper paper pad 202, the lower paper pad 203 and the backing plate 205 pass through The positioning structure is connected with the dual-circuit firing mechanism 100 . The delay agent in the fire transmission channel on the upper and lower surfaces of the medicine tray plays a delaying role, making the fire transmission more stable and reducing the blind fire rate.

The specific working principle is as follows: the dual-circuit ignition mechanism ignites the delay agent in the fire transmission channel on the upper surface of the medicine tray, and then ignites the delay agent in the fire transmission channel on the lower surface through the internal fire transmission channel. Finally, Ignite the delay medicine in the medicine tank at the center. The delay agent in the fire transmission channels on the upper and lower surfaces of the medicine tray is used to delay the fire transmission, and then the delay agent in the medicine tank at the center of the bottom of the medicine tray ignites the detonator in the explosion-proof mechanism below it, causing the fire to be transmitted. The fire is more stable and the rate of blind fire is reduced.

As a preferred structure, as shown in Figure 3, the positioning structure includes a plurality of positioning pins 207. The plurality of positioning pins 207 are radially arranged around the fire transmission hole 4 in the middle of the backing plate 205. The lower ends of the positioning pins 207 The adhesive is inserted into the mounting hole on the top of the backing plate 205, and the upper end of the positioning pin 207 is inserted into the bottom positioning hole of the dual-way ignition mechanism 100. Among them, the positioning pin is a steel piece to provide support strength for the delay mechanism; the adhesive is shellac paint. When assembling, first fix the positioning pins on the pad, then set the lower paper pad, medicine tray, and upper paper pad on the positioning posts in sequence, and finally align the positioning holes at the bottom of the ignition body with the positioning pins and place them on the upper paper. top of the pad.

During specific production, the upper and lower surfaces of the medicine tray 201 are provided with annular fire transmission channels 204, and the inside of the medicine tray 201 is provided with an intermediate fire transmission channel (not shown in the figure) that connects the upper and lower annular fire transmission channels 204; The chemical tank is connected to the annular fire transmission channel 204 through the branch tank. The use of annular fire transmission channels on the upper and lower surfaces of the medicine tray can prolong the burning time. The delayed agent combustion trajectory is the upper surface annular fire transmission channel, the middle fire transmission channel, the lower surface annular fire transmission channel and the medicine tank, and finally passes through the delayed medicine tank. At this time, the agent ignites the detonator or detonator below, thereby causing the fuze to function. The thickness of the finished medicine tray 21 is 7mm, which is the smallest size among similar products. It can reduce the overall weight and thereby reduce the weight of the fuze body remains.

In addition, the fire transfer hole 4 in the middle of the backing plate 205 is a step hole with a small upper part and a large bottom part. The fire transfer hole in the middle part of the lower paper pad 222 is larger than the upper end opening of the fire transfer hole in the middle part of the backing plate 205; the step hole of the backing plate 205 The lower part corresponds to the upper part of the cover plate 312 in the explosion-proof mechanism, and the backing plate 205 is connected to the explosion-proof mechanism 300 through two limiting pins 314 . At the same time, the cover plate 312 and the rotor base 301 are respectively provided with limiting holes 315 that match the limiting pins 314, and the two limiting pins 314 are symmetrically arranged on the rotor base 301 and outside the eccentric sinking groove 303.

During assembly, the dual-circuit ignition mechanism 100 and the delay mechanism 200 are pressed together using a load machine with a pressure of 4.5±0.5Mpa, as shown in Figure 4. During specific production, the thickness of the medicine tray 201 is 7mm, and the delay agent is a smokeless delay agent; the fuze body 1, the medicine tray 201, the backing plate 205 and the ignition body 101 of the dual-way ignition mechanism 100 are all made of 2A12 aluminum alloy materials, which can Reduce the overall weight of the fuze. After more than 1,000 rounds of static test results, it was proved that the firing mechanism and delay mechanism after changing the material can meet the shooting requirements. 2A12 high-hardness aluminum in T4 state is selected as the material of the fuze body, which reduces the total weight of the fuze to about 75 grams.

Using the above delay mechanism has the following advantages:

First of all, in order to ensure that the overall structure of the fuze is reasonable, the thickness of the medicine tray is designed to 7mm, which is the smallest size of similar products.

Secondly, the combustion trajectory of the delaying agent in the medicine tray is optimized to ensure that the delaying agent in the annular fire transmission channel on the upper surface of the medicine tray is simultaneously ignited after dual-path ignition, ensuring simultaneous ignition and combustion without risk factors such as channeling fire. It ensures the safety of shooting in the chamber.

Finally, a smokeless delay agent was selected to ensure that the fuze delay time is accurate. After more than 1,000 rounds of dynamic tests, the height and distance of the explosion point can effectively meet the shooting requirements for clouds, and the designed delay time can meet the required 13 to 17 seconds.

In a specific embodiment of the present invention, as shown in Figure 5, one side of the rotor seat 301 is provided with an eccentric sinking groove 303 for placing the rotor, and the middle part of the eccentric sinking groove 303 is rotated with the rotor 302; The middle part of the rotor base 301 is provided with a fire hole 4 that penetrates the bottom of the eccentric sinking groove 303 up and down; the rotor limiting centrifugal mechanism is provided on the side of the rotor base 301, and the rotor limiting centrifugal mechanism includes a centrifugal pin 306, a spring 307 and a Pin cover 308, the side of the rotor seat 301 is provided with a pin hole 309, the pin hole 309 is opposite to the rotor 302, the pin hole 309 is coplanar with the middle longitudinal section of the eccentric sinking groove 303, and is coplanar with the rotor seat 301 The diameters of the centrifugal pins 306 coincide with each other; the centrifugal pin 306 is radially arranged in the pin hole 309, the bottom of the pin hole 309 is provided with an opening toward the eccentric sinking groove 303, and the bottom of the centrifugal pin 306 extends to the outside of the opening and the bottom of the rotor 302 The spring 307 is arranged between the centrifugal pin 306 and the pin cover 308, and the pin cover 308 is arranged in the outer opening of the pin hole 309. As shown in Figure 6-9, the horizontally installed rotor rotates to block the fire hole. After exiting the muzzle, the fuze rotates at high speed. Under the action of centrifugal force, the centrifugal pin overcomes the elastic force of the spring and moves outward, releasing the restriction on the rotor. , the rotor rotates under the action of centrifugal force to expose the fire transmission hole, which serves the purpose of transmitting fire and detonating.

In a specific embodiment of the present invention, as shown in Figure 9, the rotor 302 is a special-shaped rotary piece, and the middle part of the rotor 302 is provided with an axis hole 305 that rotates with the rotor shaft 304 in the middle part of the eccentric sinking groove 303, so The rotor 302 includes a sector part 312 and a rectangular part 322. The eccentric sinking groove 303 is circular. The arc edges of the sector part 312 and the rectangular part 322 match the circumferential edge of the eccentric sinking groove 303. The sector part 312 and the arc edge of the rectangular portion 322, the center of the circle is concentric with the rotor shaft 304; the rectangular portion 322 is provided with a blast hole 310 that can correspond to the flame hole 4, and the sector portion 312 is a solid body; A safety pin 311 is provided on the outer surface of the eccentric sinking groove 303. The safety pin 311 is provided on the straight side of the rectangular portion 322 and close to the outer edge of the rotor seat 301, for causing the explosion after the rotor 302 rotates. The axis of the hole 310 coincides with the flame transmission hole 4 . When processing the rotor seat, a safety pin hole matching the safety pin is machined on the bottom surface of the eccentric sinking groove. Because the weight of the sector-shaped part is greater than the weight of the rectangular part, after the fuze comes out of the muzzle, the centrifugal pin can overcome the outward movement of the spring under the action of centrifugal force and release the rotor; the sector-shaped part of the rotor will be thrown towards the edge of the rotor seat under the action of centrifugal force, until the sector-shaped part The side contact safety pin can make the detonation hole of the rectangular part face the flame propagation hole, and the detonation tube can be ignited through the blast propagation hole and the flame propagation hole.

During the specific design, as shown in Figure 6, the outer opening of the pin hole 309 is threaded with the pin cover 308, a step is provided in the middle of the centrifugal pin 306, and one end of the spring 307 abuts the step surface and the other end Contacting the bottom surface of the pin cover 308; the pin hole 309 is arranged obliquely on one side of the centrifugal sink 303, the opening of the pin hole 309 is inclined upward, and the bottom of the pin hole 309 is placed on the side of the eccentric sink 303 below. This structure allows the centrifugal pin to be placed at an angle, leaving only the bottom side of the centrifugal pin exposed in the eccentric sinking groove, and a matching slot is processed at the bottom of the rotor. During launch, the tilted centrifugal pin receives a large recoil force and cannot overcome the outward movement of the spring. The centrifugal pin limits the movement of the rotor, ensuring the safety of the fuze in the chamber. After exiting the muzzle, the centrifugal force of the centrifugal pin increases during the rotation of the fuze, which can overcome the outward movement of the spring and release the rotor. Under the action of centrifugal force, the blast hole of the rotor is aligned with the forward fire hole, thus releasing the safety and transmitting fire. purpose of detonation.

To further optimize the above technical solution, as shown in Figure 5, a cover plate 312 is provided on the top of the rotor seat 301 and the rotor 302, and the central hole of the cover plate 312 corresponds to the flame transmission hole 4; the cover plate 312 passes through The screws 313 are connected to the rotor base 301, and a detonator 5 is provided in the central hole of the cover plate 312. The detonator 5 is arranged directly above the fire hole 4 in the middle of the rotor base 301; the cover plate 312 and the rotor base 301 pass through The limiting pin 314 is connected to the delay mechanism 200 . Among them, the cover plate has a stepped structure with a large upper part and a small lower part, and the upper cone of the cover plate is placed in the center hole of the backing plate of the delay mechanism. After the dual-circuit ignition mechanism of the fuze is ignited, the detonator can be ignited after passing through the delayed powder disk. When the fuze comes out of the muzzle, the rotor rotates until the blast hole is directly opposite to the flame hole, and the blast hole on the rotor can be passed. And the flame hole on the rotor seat ignites the detonation tube.

In summary, the present invention has the advantages of reasonable structural design, low misfire rate, and safety and reliability. The fuze adopts dual-channel ignition delay and explosion-proof, which further improves the reliability and safety of the fuze while controlling the size of fragments. By improving the structure of the powder tray, the impact of the pressure generated by simultaneous ignition of dual flash caps on the powder tray and other pyrotechnics parts is avoided, and the pyrotechnics in the powder tray are eliminated to make the fire transmission more stable. It has been verified through experiments that the improved dual flash caps The road fire explosion-proof fuze can effectively reduce the blind fire rate to less than 0.1%; the horizontal rotor explosion-proof scheme was selected, and more than 1,000 explosion-proof and explosion test verifications were conducted to ensure the reliability of the explosion-proof mechanism; by using the fuze The body material was replaced with high-strength aluminum, and the fragments after the bomb exploded were greatly reduced. Through the explosion test, it was verified that the maximum fragment mass could reach no more than 14 grams, solving the problem of large fragments.

Many specific details are set forth in the above description to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Those skilled in the art can do so without departing from the connotation of the present invention. Similar generalizations are made, and therefore the present invention is not limited to the specific embodiments disclosed above.

Claims (10)

1. The utility model provides a hail suppression and precipitation bullet double-circuit fire flame proof fuse which characterized in that: the explosive fuse comprises a fuse body, a double-way ignition mechanism, a time delay mechanism, an explosion-proof mechanism and a detonating tube, wherein the fuse body is a hollow shell with one end blocked, the double-way ignition mechanism is arranged at the front part of an inner cavity of the fuse body, the time delay mechanism is arranged between the double-way ignition mechanism and the explosion-proof mechanism, and the detonating tube is arranged at the rear end of the fuse body and is used for detonating an explosive body; the explosion-proof mechanism comprises a horizontal rotor and a rotor seat, wherein a fire transmission hole is formed in the middle of the rotor seat, and a rotor limiting centrifugal mechanism is arranged in the rotor seat and used for limiting the rotor in a muzzle, blocking the fire transmission hole, releasing the limitation of the rotor after the explosion-proof mechanism exits the muzzle and exposing the fire transmission hole.

2. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 1, characterized in that: the double-way ignition mechanism comprises an ignition body, a side firing pin and a fire cap, wherein two ignition holes are formed in the ignition body, the ignition holes are through holes penetrating through the ignition body up and down, the needle tip of the side firing pin is upwards arranged at the bottom of the ignition holes, the side firing pin is sleeved with a spring, the fire cap is arranged at the top of the spring, and a fire cap screw plug is screwed at the top orifice of the ignition hole; the bottom opening of the ignition hole corresponds to a fire transmission channel of the delay mechanism; the side bottom of the ignition body is provided with a pressure relief hole communicated with the ignition hole.

3. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 2, characterized in that: the time delay mechanism comprises a medicine tray and an upper paper pad at the upper end and a lower paper pad at the lower end of the medicine tray, wherein the upper surface and the lower surface of the medicine tray and the inner part of the medicine tray are respectively provided with a fire transmission channel capable of being filled with time delay medicines, the bottom of the medicine tray is provided with a base plate, the upper end of the fire transmission channel in the medicine tray is communicated with the upper paper pad and the fire transmission holes of the two-way ignition mechanism, the lower end of the fire transmission channel in the medicine tray is communicated with the lower paper pad and the fire transmission holes of the base plate, and the center position of the bottom of the medicine tray is provided with a medicine groove which is used for pressing the time delay medicines and is communicated with the fire transmission channel and is used for igniting the explosion-proof mechanism below the medicine tray; the medicine tray, the upper paper pad, the lower paper pad and the backing plate are connected with the double-path ignition mechanism through the positioning structure.

4. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 3, characterized in that: the positioning structure comprises a plurality of positioning pins, the positioning pins are radially arranged around a fire transmission hole in the middle of the base plate, the lower ends of the positioning pins are inserted into a mounting hole in the top of the base plate through an adhesive, and the upper ends of the positioning pins are inserted into a bottom positioning hole of the double-path ignition mechanism.

5. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 3, characterized in that: the upper surface and the lower surface of the medicine tray are respectively provided with an annular fire transmission channel, and the inside of the medicine tray is provided with a middle fire transmission channel communicated with the upper annular fire transmission channel and the lower annular fire transmission channel; the medicine groove is communicated with the annular fire transmission channel through the branch groove.

6. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 3, characterized in that: the thickness of the medicine tray is 7mm; the ignition bodies of the fuze body, the medicine tray, the backing plate and the two-way ignition mechanism are all made of 2A12 aluminum alloy materials; the double-path ignition mechanism and the delay mechanism are pressed together by a loading machine with the pressure of 4.5+/-0.5 Mpa.

7. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 1, characterized in that: an eccentric sinking groove for placing the rotor is formed in one side of the rotor seat, and the middle rotor of the eccentric sinking groove is in running fit; the middle part of the rotor seat is provided with a fire transmission hole which penetrates through the bottom of the eccentric sinking groove vertically; the rotor limiting centrifugal mechanism is arranged on the side face of the rotor seat and comprises a centrifugal pin, a spring and a pin cover, a pin hole is formed in the side face of the rotor seat, the pin hole is opposite to the rotor, and the pin hole is coplanar with the middle longitudinal section of the eccentric sinking groove and coincides with the diameter of the rotor seat; the centrifugal pin is radially arranged in the pin hole, an opening facing the eccentric sinking groove is formed in the bottom of the pin hole, and the bottom of the centrifugal pin extends to the outside of the opening to be matched with the clamping groove at the bottom of the rotor; the spring is arranged between the centrifugal pin and the pin cover, and the pin cover is arranged in the outer side orifice of the pin hole.

8. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 7, characterized in that: the rotor is a special-shaped rotary member, a shaft hole in rotation fit with a rotor shaft in the middle of the eccentric sinking groove is formed in the middle of the rotor, the rotor comprises a fan-shaped portion and a rectangular portion, the eccentric sinking groove is circular, the arc-shaped edges of the fan-shaped portion and the rectangular portion are matched with the circumferential edge of the eccentric sinking groove, and the circle center of the circle where the arc-shaped edges of the fan-shaped portion and the rectangular portion are located is concentric with the rotor shaft; the rectangular part is provided with explosion propagation holes which can correspond to the fire propagation holes, and the fan-shaped part is a solid; and a safety pin is arranged on the outer side surface of the eccentric sinking groove, is arranged on the straight side of the rectangular part and is close to the outer side edge of the rotor seat, and is used for enabling the axis of the explosion transmission hole to coincide with the axis of the fire transmission hole after the rotor rotates.

9. The hail-suppression and rain-enhancement bomb double-way ignition flame-proof fuze according to claim 7, characterized in that: the rotor seat and the top of the rotor are provided with cover plates, and the central holes of the cover plates correspond to the fire transmission holes; the cover plate is connected with the rotor seat through a screw, a detonator is arranged in a central hole of the cover plate, and the detonator is arranged right above a fire transmission hole in the middle of the rotor seat; the cover plate and the rotor seat are connected with the time delay mechanism.

10. The hail suppression and rain enhancement bomb double-way firing flame-proof fuze according to any one of claims 1-9, wherein: the opening end of the fuze body is connected with the connecting screw cover, and a through hole tightly matched with the detonating tube is arranged in the middle of the connecting screw cover.