CN114370796B - Small-caliber rotary bullet mechanical trigger fuze with safe explosive treatment after misfire - Google Patents

Abstract

The invention discloses a small-caliber rotary bullet mechanical trigger fuse which is safe in explosive treatment after blind fire, and adopts a collision type trigger mechanism, a centrifugal self-destruction and inertia trigger mechanism, a centrifugal safety mechanism of the centrifugal self-destruction and inertia trigger mechanism, an explosion-proof and delay release safety mechanism, a recoil safety mechanism of the explosion-proof and delay release safety mechanism and a centrifugal safety mechanism. The impact type trigger mechanism comprises a bidirectional trigger fire cap, a moistureproof sheet and an upper body. The centrifugal self-destruction and inertia trigger mechanism is a centrifugal ball-spring-firing pin mechanism. The explosion-proof and delay releasing safety mechanism is a ball rotor mechanism. The recoil safety mechanism and the centrifugal safety mechanism of the explosion-proof and delay releasing safety mechanism are respectively a safety pin-shearing pin mechanism and a split ring. The fuze has a simple structure, fully utilizes the fuze space, has the functions of explosion suppression, redundant insurance, delay relief insurance, self-destruction, collision triggering, standby inertial triggering, floor cleaning and explosion and fire insulation, and is safe in explosive treatment after fire extinction.

Description

Blind-Fire Post-Explosive Ordnance Disposal Safe Small Caliber Rotary Projectile Warhead Mechanical Trigger Fuze

technical field

The invention belongs to the fuze technology of small-caliber artillery shells, and in particular relates to a small-caliber rotary projectile warhead trigger fuze with excellent characteristics of handling explosives after misfire.

Background technique

Small-caliber artillery shells generally refer to ammunition with a caliber of 20 mm to 40 mm, which are fired by artillery and complete killing, blasting, penetration, or other tactical purposes. Due to their strong mobility and high firing rate, they are widely used in the army, sea, and air forces.

Due to the limited size, it is difficult for the fuze of shells with a caliber of 20 to 30 mm to fully meet the "Design Criteria for Safety of Fuze" and have the performance of wiping the ground, igniting at a large angle, and self-destructing at the same time. And its sensitive explosive elements still exist after misfiring, and are often even in a dangerous ready state, so that the explosive ordnance disposal safety of unexploded ammunition cannot be guaranteed.

Contents of the invention

The purpose of the present invention is to provide a small-caliber rotary projectile warhead mechanical trigger fuze that is safe to dispose of explosives after misfire, improve the safety of explosive disposal of unexploded ammunition formed after the small-caliber rotary projectile fuze is misfired, and fully meet the " According to the relevant requirements of the Fuze Safety Design Criteria, it also has the performance of wiping the ground, igniting at a large angle and self-destructing.

The technical solution to realize the object of the present invention: a small-caliber rotating warhead mechanical trigger fuze that is safe to dispose of explosives after blind fire, including a main body, an upper body, an impact trigger mechanism, a centrifugal self-destruction and inertial trigger mechanism, a centrifugal self-destruction The centrifugal insurance mechanism of the destruction and inertia trigger mechanism is the safety ring, the explosion-proof and delayed release insurance mechanism, the recoil insurance mechanism of the explosion-proof and delayed release insurance mechanism is the safety pin-shear pin mechanism, the centrifugal of the explosion-proof and delayed release insurance mechanism The safety mechanism is the split ring and the detonator tube; the upper body and the main body are coaxially arranged, and the upper part of the main body extends into the lower part of the upper body, and then the two are fixedly connected to form the fuze shell, the impact trigger mechanism, the centrifugal self-destruction and inertial trigger mechanism The explosion-proof and delayed release insurance mechanism is arranged in the fuze casing from top to bottom in sequence; the safety pin-shear pin mechanism constrains the explosion-proof and delayed release insurance mechanism on the body; the safety ring is set on the centrifugal self-destruct and inertial trigger mechanism The top surface of the fuse; the split ring is set on the flameproof and delayed release safety mechanism, and the detonator is located at the bottom of the fuze shell, and is close to the flameproof and delayed release safety mechanism.

The percussion trigger mechanism mainly includes a moisture-proof sheet and a two-way trigger cap set in the upper body; the centrifugal self-destruct and inertial trigger mechanism mainly includes a firing pin frame, firing pin, spring and several centrifugal balls; the firing pin points upward to the two-way trigger cap , the insurance ring is set on the firing pin, the firing pin holder, the insurance ring and the upper body together realize the centrifugal insurance of the centrifugal self-destruction and inertial trigger mechanism. The explosion-proof and delayed release insurance mechanism mainly includes an isolation ball, a ball seat and two Two-way input flame detonator; safety pin-shear pin mechanism mainly includes safety pin, shear pin and plug; the plug is cylindrical and coaxial with the shear pin, which shortens the shear pin hole and improves the processing performance ; The isolation ball is provided with a transverse through hole passing through the center of the ball, and two bidirectional input flame detonators are symmetrically arranged in the transverse through hole; the top of the isolation ball is provided with a first blind hole coaxial with the fuze; the body , safety pin, shear pin, and plug jointly realize the recoil insurance of the explosion-proof and delayed release safety mechanism; the safety pin is set in the first blind hole on the isolation ball; the shear pin vertically passes through the safety pin and extends into the isolation Ball, fix the safety pin in the first blind hole on the isolation ball, and at the same time, the upward protruding part of the safety pin extends into the center hole of the body, constraining the rotation of the isolation ball; the plug is fixed on the isolation ball by point riveting, Block the shear pin; the split ring is stuck outside the crescent-shaped notch at the lower end of the spacer ball, limiting the rotation of the spacer ball, that is, the ball rotor, and realizing another insurance for the spacer ball, that is, centrifugal safety, ball seat and split ring The explosion-proof and delayed release safety mechanism is constituted, that is, the centrifugal safety mechanism of the ball rotor part; the explosion-proof tube is arranged at the rear end of the flame-proof and delayed release safety mechanism, and the upper part of the explosion-proof tube extends into the body and is fixedly connected with the ball seat. The two-way trigger cap of the impact trigger mechanism is located at the top of the impact trigger mechanism, and its diameter is 60%-90% of the diameter of the upper body head hole (second-order hole), which can improve the impact trigger sensitivity and increase the angle of attack. Fire and ground blasting effects are correct. The centrifugal self-destruction and inertial trigger mechanism adopts the centrifugal ball-spring-firing pin mechanism, which can realize centrifugal self-destructing and inertial triggering. The firing pin is a hollow structure, which does not affect the fire transmission when the fuze is self-destructing and triggering. The explosion-proof and delayed release safety mechanism is a ball rotor mechanism, which keeps the two-way input flame detonator in the explosion-proof state at ordinary times, and realizes the delayed release safety function after the safety mechanisms are released, so as to ensure that the fuze is released when the projectile flies out of the muzzle. Release the insurance to ensure safe launch. Safety Pin - Shear pin and split ring for redundant safety of the ball rotor mechanism. The two-way input flame detonator in the isolation ball and the multiple fire transmission channels on the isolation ball ensure that the output of the two-way trigger cap of the fuze head can reliably ignite the aligned or unaligned two-way input flame detonator. If the two-way input flame detonator is in the alignment state, the fuze is normally ignited; if the two-way input flame detonator is in the non-alignment state, the fuze will achieve flameout, ensuring the safety of explosive disposal of unexploded ammunition formed by fuze misfiring.

Compared with the prior art, the present invention has the remarkable advantages of:

(1) The overall structure has a compact layout along the axial direction, rational use of internal space, and fully meets the relevant design requirements of the "Fuze Safety Design Guidelines".

(2) One piece is multi-functional, and one piece is multi-purpose, which simplifies the structure, reduces the cost, and helps to improve reliability.

(3) Functional partitions and separate structures are easy to test and verify during the development process, thereby shortening the development cycle and reducing development costs.

(4) The diameter of the two-way trigger cap is 60%-90% of the diameter of the hole in the upper body of the fuze, which improves the accuracy of impact triggering, large-angle ignition and ground-grazing action.

(5) The hollow firing pin is adopted. Compared with the traditional firing pin, the tip of the firing pin is easily broken by the two-way trigger cap charge after firing, thus forming a fire transmission channel, so that the flame or detonation can be transmitted reliably.

(6) There are multiple fire transmission channels on the isolation ball leading to the inner side of the two-way input flame detonator, which is conducive to the two-way triggering of the fire cap flame propagation, and reliably realizes the fire-proof function in the unreleased state.

Description of drawings

Fig. 1 is the main cross-sectional view of the structure of the mechanical trigger fuze of the small-caliber rotary projectile warhead safe for explosive ordnance disposal after blind fire of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Combining with Figure 1, a small-caliber rotating warhead mechanical trigger fuze with safe explosive disposal after blind fire, including body 1, upper body 2, impact trigger mechanism 3, centrifugal self-destruct and inertial trigger mechanism 4, centrifugal self-destruct The centrifugal insurance mechanism of the inertial trigger mechanism 4 is the safety ring 5, the explosion-proof and delayed release insurance mechanism 6, the explosion-proof and delayed release insurance mechanism 6 The recoil insurance mechanism is the safety pin-shear pin mechanism 7, the explosion-proof and delayed release The centrifugal safety mechanism of safety mechanism 6 is split ring 8, detonator tube 9; upper body 2 and body 1 are coaxially arranged, and the top of body 1 stretches into the bottom of upper body 2, and the two are fixedly connected to form the fuze shell after impacting. Type trigger mechanism 3, centrifugal self-destruction and inertial trigger mechanism 4, explosion-proof and delayed release safety mechanism 6 are arranged in the fuze shell from top to bottom in sequence; 6 is constrained on the body 1; the safety ring 5 is set on the top surface of the centrifugal self-destruct and inertial trigger mechanism 4; the split ring 8 is set on the flameproof and delayed release safety mechanism 6, and the detonator tube 9 is located at the bottom of the fuze shell and is close to Explosion-proof and delayed release insurance mechanism 6.

Further, the upper body 2 is provided with seven-step through holes with different inner diameters from the top surface along its central axis. From top to bottom, there are first step holes, second step holes, third step holes, and fourth step holes. Holes, fifth-order holes, sixth-order holes and seventh-order holes, the diameter of the fourth-order holes is smaller than the diameter of the third-order holes, and smaller than the diameter of the fifth-order holes.

The impact trigger mechanism 3 mainly includes a moisture-proof sheet 31 arranged in the upper body 2 and a two-way trigger fire cap 32. The moisture-proof sheet 31 is arranged in the first-stage hole of the upper body 2, and is fixed through the top surface of the upper body 2. Two-way The trigger cap 32 is fixed in the third-order hole of the upper body 2 . The centrifugal self-destruction and inertia trigger mechanism 4 includes a firing pin frame 41 , a firing pin 42 , a spring 44 and several centrifugal balls 43 . The firing pin 42 points upward to the two-way firing cap 32, the safety ring 5 is set on the firing pin 42, the safety ring 5 is located in the fifth-order hole, and the firing pin frame 41 is located in the sixth-order hole and fixed to the upper end of the seventh-order hole inner wall. Even, the firing pin 42 passes through the firing pin frame 41 upwards, and is axially restrained by the safety ring 5 , and the upper body 2 is screwed to the body 1 through its seventh-order hole, so that the body 1 is against the firing pin frame 41 . The firing pin holder 41, the insurance ring 5 and the upper body 2 jointly realize the centrifugal insurance of the centrifugal self-destruction and inertial trigger mechanism 4. The explosion-proof and delayed release safety mechanism 6 (ie, the ball rotor mechanism) mainly includes an isolation ball 61 , a ball seat 63 and two bidirectional input flame detonators 62 . The safety pin-shear pin mechanism 7 mainly includes a safety pin 71 , a shear pin 72 and a plug 73 . The plug 73 is cylindrical and coaxial with the shear pin 72 . The isolation ball 61 is provided with a transverse through hole passing through the center of the sphere, and two bidirectional input flame detonators 62 are symmetrically arranged in the transverse through hole. The top of the isolation ball 61 is provided with a first blind hole coaxial with the fuze. Body 1, safety pin 71, shear pin 72, and plug 73 jointly realize the recoil insurance to explosion-proof and delay release insurance mechanism 6. The safety pin 71 is disposed in the first blind hole. The shear pin 72 vertically passes through the safety pin 71 and extends into the spacer ball 61, and the safety pin 71 is fixed in the first blind hole on the spacer ball 61, while the upward protruding part of the safety pin 71 extends into the central hole of the body 1, The rotation of the spacer ball 61 is constrained. The plug 73 is fixed on the spacer ball 61 by spot riveting to block the shear pin 72 . The split ring 8 is stuck outside the crescent-shaped notch at the lower end of the isolation ball 61, limiting the rotation of the isolation ball 61, that is, the ball rotor, and realizing another insurance for the isolation ball 61, that is, centrifugal insurance. Ball seat 63 and split ring 8 have constituted the centrifugal insurance mechanism of explosion-proof holding concurrently to postpone to release insurance mechanism 6. The detonator tube 9 is arranged on the explosion-proof and delayed release safety mechanism 6 rear end, and the detonator tube 9 top stretches into the body 1 and is fixedly connected with the ball seat 63 .

The diameter of the two-way trigger cap 32 of the percussion trigger mechanism 3 is 60%-90% of the diameter of the second-order hole in the upper body 2, and when the fuze hits the target with a large or small drop angle, it can improve the large impact. The reliability of the horn firing and ground blasting effects also helps to improve the trigger sensitivity.

Further, the safety ring 5 and the firing pin frame 41 are arranged coaxially from top to bottom, and the safety ring 5 forms a clearance fit between the firing pin frame 41 and the bottom surface of the fifth-order hole of the upper body 2, and the safety ring 5 can be used under centrifugal force. Swing it down to release the firing pin 42. The firing pin 42 is a hollow structure, so it does not affect the fire transmission when the fuze is self-destructed and triggered.

Further, the safety pin 71 is provided with an axial stepped blind hole and two transverse through holes, the axial stepped blind hole is arranged downward along the top end of the safety pin 71, and the axial stepped blind hole is arranged along the aperture above the safety pin 71. Larger than the lower aperture, two transverse through holes are arranged in the axial direction, and respectively pass through the lower stepped holes with small diameters to form a fire transmission channel, which is beneficial to the bidirectional trigger fire cap flame input and spread to the bidirectional input flame detonator 62 in the isolation ball 61 , so that the fuze can realize the flameout in the state of not releasing the insurance, so as to ensure the safety of the explosive disposal of the unexploded ammunition formed after the fuze is misfired.

Further, the isolation ball 61 is also symmetrically provided with two fire transmission holes leading to the center in a plane passing through the center of the ball and perpendicular to the axis of the two-way input flame detonator. And the gap between the ball rotor part and its chamber, the two-way trigger fire cap flame is transmitted to the inner side and the outer side of the two-way input flame detonator 62 in the isolation ball 61, and the fuze realizes the flame-out in the unsafe state, thereby ensuring the fuze Explosive ordnance disposal safety of unexploded ordnance formed after misfire.

Further, the centrifugal ball 43 is a ceramic ball, such as a zirconia ceramic ball used as a bearing rolling body, its density is about 6 g/cm ³ , which is slightly lower than that of stainless steel, but its friction coefficient is low, which is beneficial to improve the self-improvement. The reliability of the action when destroying, inertial triggering, ground-grazing action, and high-angle fire.

Further, the outer wall of the lower part of the ball seat 63 is provided with a ring of flanges, and the bottom end of the body 1 closes inwards to the flange to fix the ball seat 63, thereby improving the connection strength between the ball seat 63 and the body 1, ensuring Structural integrity and safety under the superposition of launch shock overload and flameproof internal pressure.

Example

With reference to Fig. 1, a mechanical trigger fuze of a small-caliber rotary projectile warhead safe for disposal of explosives after blind fire according to the present invention includes a main body 1, an upper body 2, an impact trigger mechanism 3, and a centrifugal self-destruction and inertial trigger mechanism 4. The centrifugal safety mechanism of the centrifugal self-destruction and inertial trigger mechanism 4 is the safety ring 5, the explosion-proof and delayed release safety mechanism 6, the recoil safety mechanism of the explosion-proof and delayed release safety mechanism 6 is the insurance pin-shear pin mechanism 7, The centrifugal safety mechanism of the explosion-proof and delayed release safety mechanism 6 is the split ring 8 and the blast tube 9; the upper body 2 and the main body 1 are coaxially arranged, and the upper part of the main body 1 extends into the lower part of the upper body 2, and then the two are fixedly connected to form Fuze casing, impact trigger mechanism 3, centrifugal self-destruct and inertia trigger mechanism 4, explosion-proof and delayed release safety mechanism 6 are arranged in the fuze casing in sequence from top to bottom; safety pin-shear pin mechanism 7 combines explosion-proof and The delayed release safety mechanism 6 is bound on the body 1; the insurance ring 5 is set on the top surface of the centrifugal self-destruct and inertial trigger mechanism 4; the split ring 8 is set on the flameproof and delayed release safety mechanism 6, and the detonator tube 9 is located in the fuze shell Bottom, and close to the explosion-proof and delay release insurance mechanism 6.

Furthermore, the impact trigger mechanism 3 mainly includes a moisture-proof sheet 31 and a two-way trigger cap 32 arranged in the upper body 2. The moisture-proof sheet 31 is arranged in the first-stage hole of the upper body 2 and closes through the top surface of the upper body 2. Fixed, the two-way trigger fire cap 32 is fixed in the third-order hole of the upper body 2. The centrifugal self-destruction and inertia trigger mechanism 4 includes a firing pin frame 41 , a firing pin 42 , a spring 44 and several centrifugal balls 43 . The firing pin 42 points upward to the two-way firing cap 32, the safety ring 5 is set on the firing pin 42, the safety ring 5 is located in the fifth-order hole, and the firing pin frame 41 is located in the sixth-order hole and fixed to the upper end of the seventh-order hole inner wall. Even, the firing pin 42 passes through the firing pin frame 41 upwards, and is axially constrained by the safety ring 5 , and the upper body 2 is screwed to the body 1 through its seventh-order hole, so that the body 1 is against the firing pin frame 41 . The firing pin holder 41, the insurance ring 5 and the upper body 2 jointly realize the centrifugal insurance of the centrifugal self-destruction and inertial trigger mechanism. The explosion-proof and delayed release safety mechanism 6 (ie, the ball rotor mechanism) mainly includes an isolation ball 61 , a ball seat 63 and two bidirectional input flame detonators 62 . The safety pin-shear pin mechanism 7 mainly includes a safety pin 71 , a shear pin 72 and a plug 73 . The plug 73 is cylindrical and coaxial with the shear pin 72 . The isolation ball 61 is provided with a transverse through hole passing through the center of the sphere, and two bidirectional input flame detonators 62 are symmetrically arranged in the transverse through hole. The top of the isolation ball 61 is provided with a first blind hole coaxial with the fuze. Body 1, safety pin 71, shear pin 72, and plug 73 have jointly realized the recoil insurance of the explosion-proof and delayed release insurance mechanism. The safety pin 71 is disposed in the first blind hole. The shear pin 72 vertically passes through the safety pin 71 and extends into the spacer ball 61, and the safety pin 71 is fixed in the first blind hole on the spacer ball 61, while the upward protruding part of the safety pin 71 extends into the central hole of the body 1, The rotation of the spacer ball 61 is constrained. The plug 73 is fixed on the spacer ball 61 by spot riveting to block the shear pin 72 . The split ring 8 is stuck on the outer side of the crescent-shaped notch at the lower end of the spacer ball 61, which limits the rotation of the spacer ball 61, that is, the ball rotor, and realizes another insurance for the spacer ball 61, that is, centrifugal safety. The ball seat 63 and the split ring 8 constitute Centrifugal insurance mechanism with explosion-proof and delayed release insurance mechanism. The detonator tube 9 is arranged on the explosion-proof and delayed release safety mechanism 6 rear end, and the detonator tube 9 top stretches into the body 1 and is fixedly connected with the ball seat 63 .

The upper body 2 is in the shape of a conical cone. From the top surface of the upper body 2 along its central axis, there are seven stepped through holes with different inner diameters. From top to bottom, there are first hole, second hole, third hole Holes of first order, fourth order, fifth order, sixth order and seventh order. The diameters of the first to fourth holes of the upper body 2 decrease sequentially from top to bottom, the diameters of the fifth to seventh holes increase sequentially, and internal threads are provided at the bottom of the seventh holes. The outer contour of the body 1 includes a top-down first cylinder, a first circular platform and a second cylinder, wherein the first cylinder and the second cylinder are provided with external threads for connecting with the seventh-order hole and the upper body 2 respectively. The inner thread of the body mouth is connected. The cone angles of the outer contour (conical surface) of the first circular platform and the upper body 2 are equal, and the diameter of the joint is the same, which is a smooth transition. The inner cavity of the body 1 is a five-step stepped through hole coaxially arranged from top to bottom along the central axis, which are respectively the eighth step hole, the ninth step hole, the tenth step hole, the eleventh step hole, the twelfth step hole and thirteenth-order holes. The eighth-order hole of the body 1 is used to block the firing pin frame 41, the ninth-order hole is provided with the firing pin 42, the tenth-order hole is used to accommodate the spring 44, the eleventh-order hole is used to block the safety pin 71, and the tenth-order hole is used to hold the safety pin 71. The twelfth-stage hole is a hemispherical chamber, which is a part of the ball rotor chamber, and the thirteenth-stage orifice is provided with a section of internal thread for connecting with the external thread of the ball seat 63 .

The isolation ball 61 is a sphere, on which a transverse through hole passing through the center of the sphere is arranged, and two bidirectional input flame detonators 62 are arranged in the transverse through hole. The inward ends of these two bidirectional input flame detonators 62 are input ends, and the outward ends are both input ends and output ends. The split ring 8 is stuck outside the crescent-shaped notch at the lower end of the isolation ball 61, limiting the rotation of the isolation ball 61, that is, the ball rotor, and realizing an insurance for the isolation ball 61, that is, centrifugal insurance.

The upper end of the spacer ball 61 is provided with a transverse blind hole, which is the first transverse blind hole.

The top of the isolation ball 61 is provided with a first blind hole coaxial with the fuze, and the main body 1, safety pin 71, shear pin 72 and plug 73 constitute a recoil safety mechanism of the explosion-proof and delay release safety mechanism, and the explosion-proof and delay The recoil safety mechanism of the release safety mechanism is mainly that the safety pin 71 is arranged in the first blind hole. The safety pin 71 is a cylindrical pin structure, and a transverse through hole is provided at the lower end near the bottom end, which is the first through hole. Another transverse through hole, which is the second through hole, is provided at the center of the safety pin 71 . Another transverse stepped through hole is also provided on the second through hole, which is the third through hole. From the center of the bottom of the first blind hole, a second blind hole coaxial with the fuze is provided through the first through hole and the second through hole, and the diameter of the second blind hole is smaller than that of the first blind hole. The shear pin 72 is disposed in the first transverse blind hole on the isolation ball 61 and passes through the third through hole on the safety pin 71 to fix the safety pin 71 on the isolation ball 61 . The plug 73 is located outside the opening of the third through hole on the isolation ball 61 to fix the shear pin 72 .

The above is the assembly state of the fuze.

During the service processing stage, credible shocks and vibrations, including dropping, knocking and transport shocks, etc., will not cause the fuze to change its assembly state. When the fuze head falls downward, the upper body 2 and the moisture-proof sheet 31 may be deformed and compressed, but the two-way firing cap 32 will not be triggered. In addition, due to the insurance effect of the safety ring 5, the firing pin 42 will not trigger the fire. Two-way trigger flash hider 32. The flameproof and delayed release safety mechanism in the fuze has a recoil safety mechanism (safety pin 71 and shear pin 72) and split ring 8 all in the safety position, ensuring that the flameproof and delay release safety mechanism 6 is in the flameproof state. One or all of the two-way input flame detonators 62 in the fuze are accidentally ignited and exploded, will not produce dangerous fragments externally, will not detonate the detonator tube 9, and will not have high-temperature and high-pressure gaseous products to escape from the fuze and enter the projectile explosive chamber. Fuze and The projectiles will not be accidentally fired, which can ensure the safety of the service processing stage.

When the projectile is launched, under the recoil force, the safety pin 71 will cut off the shear pin 72 and move downward until the safety pin 71 no longer protrudes from the outer contour of the isolation ball 61 and retracts from the center hole of the body 1, Remove one insurance to isolation ball 61. Afterwards, the safety pin 71 continues to move downward until its bottom surface abuts against the bottom of the blind hole in the axial direction of the isolation ball 61. At this time, the center of mass of the safety pin 71 is lower than the position of the center of the isolation ball 61, ensuring that the subsequent movement of the isolation ball 61 The middle safety pin 71 will always be in the bottom position of the first blind hole of the isolation ball 61 due to the centrifugal force and the frictional force produced by its restraint reaction force and will not restore the safety again, so as to ensure that the isolation ball 61 is correctly released.

While the projectile is fired, before the projectile moves to the maximum bore pressure point, the recoil force of the firing pin 42, the centrifugal ball 43 and the spring 44 moves the firing pin 42, the centrifugal ball 43 and the spring 44 downward, compresses the spring 44, and makes the firing pin 42 The bottom ring surface abuts against the bottom plane of the central hole of the head of the body 1 . The centrifugal ball 43 is thrown out along the radial hole under the action of centrifugal force. When the projectile moves close to the muzzle, the rotational speed of the projectile gradually tends to the maximum value. Clamped on the ready-to-fire position close to the recoil, at this moment, the striker tip is away from the two-way trigger cap 32, and the spring 44 is in a compressed state.

The projectile moves close to the muzzle, and the rotational speed is close to the maximum. Under the action of centrifugal force, the split ring half ring makes the split ring 8 open in the form of centrifugal torque, and then removes another insurance for the isolation ball 61. Thereafter, the isolation ball 61 rotates under the action of centrifugal torque, and rotates to the alignment position beyond the safe distance of the projectile flying out of the muzzle (usually 20 m for small-caliber projectiles), that is, the two-way input flame detonator 62 at one end of the isolation ball 61 Facing said firing pin frame 41 and firing pin 42, the two-way input flame detonator 62 at the other end faces the detonator 9, the axis of the two-way input flame detonator 62 coincides or nearly coincides with the bomb shaft, and the fuze is in the disarmed state.

When the projectile moves close to the opening of the muzzle opening ring 8, the safety ring 5 also opens under the action of the centrifugal force according to the same principle as the opening ring, which no longer restricts the axial movement of the firing pin 42, and the fuze hits the trigger mechanism. The inertia firing channel of 3 and the self-destruction firing channel are opened, and the fuze impact trigger mechanism 3 is in a ready state.

When the projectile hits the target in the forward direction or with the posture of wiping the ground or with the posture of a large angle of attack, the moisture-proof sheet 31 and the target sheet work together to hit the top of the two-way trigger cap 32 and fire, or the firing pin 42 will also fire after a while. Under the action of the forward momentum, the needle will move forward and hit the bottom of the two-way trigger cap 32 of the trigger mechanism 3 to ignite, and the tip of the firing pin 42 will be smashed, and the detonation products, especially high-temperature and high-pressure gas and solid particles, will be fired along the strike. The needle 42 passes down through the central channel, passes through its central channel along the axis of the spring, and directly triggers the two-way input flame detonator 62 at the upper end of the isolation ball 61 in the alignment state, and the two-way input flame detonator 62 at the upper end of the isolation ball 61 detonates the two-way input flame detonator at the lower end of the isolation ball 61. Input the flame detonator 62, then detonate the detonator 9, and the fuze completes the normal detonation process of firing. The diameter of the two-way trigger cap 32 is relatively large, so that the fuze wipes the ground and explodes and the reliability of firing at a large angle of attack can be realized. The inertial triggering effect of the centrifugal ball-spring-firing pin mechanism is redundant with the impact triggering action, and it plays a backup role when the head impact ignition fails, which also improves the firing reliability.

If the projectile misses the target while flying in the air, when the rotational speed of the projectile decays to a certain degree (before landing), the resistance force of the spring 44 will be greater than the axial reaction force generated by the centrifugal ball 43 passing through the self-destructing slope at the bottom of the firing pin frame 41. The ball 43 can be withdrawn in the radial hole of the firing pin, and the spring 44 promotes the firing pin 42 to move forward and poke the two-way firing cap 32, so as to realize the predetermined self-destruct function in the air and ensure the safety on the ground.

If the ball rotor safety fails to align accidentally, then during predetermined trigger action or self-destruction, the detonation product of the two-way trigger cap 32 will pass through the gap between the isolation ball 61 and its chamber and the preset diameter on the isolation ball 61. To the fire transmission hole, reliably ignite the two-way input flame detonator 62 in the isolation ball 61 that is not aligned, and the two two-way input flame detonators 62 in the isolation ball 61 will also be killed each other, but the detonator can not be detonated. When the fuze loses its normal detonation function, it enters the flameout state, thereby ensuring the safety of explosive disposal of unexploded ammunition formed by fuze misfiring.

If the safety ring 5 fails to open due to an accident, the fuze will lose its self-destruct performance. However, since the two-way trigger cap can still smash the tip of the firing needle and transmit the fire reliably downward, the impact trigger function and fire-stop function of the fuze still exist and are not affected.

Claims (4)

1. The utility model provides a safe rotatory bullet warhead machinery of small-bore bullet trigger fuse of explosive treatment after blind fire which characterized in that: the explosion-proof and delay-relieving safety mechanism comprises a body (1), an upper body (2), a collision type triggering mechanism (3), a centrifugal self-destruction and inertia triggering mechanism (4), a centrifugal safety mechanism of the centrifugal self-destruction and inertia triggering mechanism (4), namely a safety ring (5), an explosion-proof and delay-relieving safety mechanism (6), a recoil safety mechanism of the explosion-proof and delay-relieving safety mechanism (6), namely a safety pin-shearing pin mechanism (7), a centrifugal safety mechanism of the explosion-proof and delay-relieving safety mechanism (6), namely a split ring (8) and a booster tube (9); the upper body (2) and the body (1) are coaxially arranged, the upper part of the body (1) stretches into the lower part of the upper body (2) and is fixedly connected with the lower part of the upper body to form a fuse shell, and the impact type triggering mechanism (3), the centrifugal self-destruction and inertial triggering mechanism (4) and the flameproof and delay releasing safety mechanism (6) are sequentially arranged in the fuse shell from top to bottom; the explosion-proof and delay releasing safety mechanism (6) is restrained on the body (1) by the safety pin-shearing pin mechanism (7); the safety ring (5) is sleeved on the top surface of the centrifugal self-destruction and inertia trigger mechanism (4); the opening ring (8) is arranged on the flameproof and delay relief mechanism (6), and the detonating tube (9) is positioned at the bottom of the fuze shell and is close to the flameproof and delay relief mechanism (6); the method is characterized in that:

the impact type trigger mechanism (3) mainly comprises a moistureproof sheet (31) and a bidirectional trigger fire cap (32) which are arranged in the upper body (2); the centrifugal self-destruction and inertia trigger mechanism (4) mainly comprises a needle striking frame (41), a needle striking (42), a spring (44) and a plurality of centrifugal balls (43); the firing pin (42) points upwards to the bidirectional trigger fire cap (32), the safety ring (5) is sleeved on the firing pin (42), the firing pin frame (41), the safety ring (5) and the upper body (2) jointly realize centrifugal safety of the centrifugal self-destruction and inertia trigger mechanism (4), and the flameproof and delay release safety mechanism (6) mainly comprises a separation ball (61), a ball seat (63) and two bidirectional input flame detonators (62); the safety pin-shear pin mechanism (7) mainly comprises a safety pin (71), a shear pin (72) and a seal plug (73); the sealing plug (73) is cylindrical and is coaxially arranged with the shearing pin (72); the isolating ball (61) is provided with a transverse through hole passing through the center of the ball, and two bidirectional input flame detonators (62) are symmetrically arranged in the transverse through hole; the top end of the isolation ball (61) is provided with a first blind hole coaxial with the fuze; a safety pin (71) is arranged in the first blind hole; the shear pin (72) vertically penetrates through the safety pin (71) to extend into the isolation ball (61), the safety pin (71) is fixed in a first blind hole on the isolation ball (61), and meanwhile, the upward extending part of the safety pin (71) extends into the central hole of the body (1), so that the rotation of the isolation ball (61) is restrained; the sealing plug (73) is fixed on the isolation ball (61) through point riveting, and seals the shearing pin (72); the isolation ball (61), the safety pin (71), the shearing pin (72) and the sealing plug (73) jointly realize the squat safety of the explosion-proof and delay relief mechanism (6); the split ring (8) is clamped at the outer side of the crescent notch at the lower end of the isolation ball (61), so that the rotation of the isolation ball (61), namely a ball rotor, is limited, and the other safety of the isolation ball (61), namely centrifugal safety, is realized; the ball seat (63) and the opening ring (8) jointly realize centrifugal insurance of the explosion-proof and delay releasing insurance mechanism (6); the explosion-proof and delay releasing safety mechanism (6) is arranged at the rear end of the explosion-proof and delay releasing safety mechanism, and the upper part of the explosion-proof and delay releasing safety mechanism (9) extends into the body (1) and is fixedly connected with the ball seat (63);

seven step through holes with different inner diameters are formed downwards along the central axis of the upper body (2), and a first step hole, a second step hole, a third step hole, a fourth step hole, a fifth step hole, a sixth step hole and a seventh step hole are sequentially formed from top to bottom; the diameter of the bidirectional trigger fire cap (32) of the impact type trigger mechanism (3) is 60-90% of the diameter of the second step hole in the upper body (2), when the fuze hits a target with a large or small landing angle, the reliability of the firing and floor scrubbing actions with the large landing angle can be improved, and the trigger sensitivity can be improved;

the safety pin (71) is provided with an axial stepped blind hole and two transverse through holes, the axial stepped blind hole is downwards and coaxially arranged along the top end of the safety pin (71), the aperture of the axial stepped blind hole along the upper part of the safety pin (71) is larger than that of the lower part, the two transverse through holes are axially distributed and respectively penetrate through the lower stepped holes with small diameters to form a fire transmission channel, so that bidirectional triggering of the flame of the fire cap is facilitated to be input from the top end of the safety pin (71) and transmitted to the inner side end of a bidirectional input flame detonator (62) in the isolation ball (61), and the fuse achieves fire insulation under the state of not releasing the fuse, thereby ensuring the explosive treatment safety after the fuse is in a fire failure;

the isolating ball (61) is symmetrically provided with 2 fire transmission holes leading to the center in a plane which passes through the center of the isolating ball and is perpendicular to the axis of the bidirectional input flame detonator, and the bidirectional trigger flame cap flame is transmitted to the outer side end of the bidirectional input flame detonator (62) in the isolating ball (61) by means of a plurality of axial eccentric fire transmission holes on the body (1) and gaps between the ball rotor component and the cavity of the ball rotor component, so that the fuse realizes fire insulation under the state of not releasing the fuse, and the explosive treatment safety after the fuse is out of fire is ensured.

2. A post-blind explosive handling safe small caliber rotary bullet mechanical triggering fuse according to claim 1, wherein: the safety ring (5) and the firing pin frame (41) are coaxially arranged from top to bottom, the safety ring (5) forms clearance fit between the firing pin frame (41) and the bottom surface of the fifth-order hole of the upper body (2), and the safety ring (5) can be thrown away under the action of centrifugal force so as to release the firing pin (42).

3. A post-blind explosive handling safe small caliber rotary bullet mechanical triggering fuse according to claim 1, wherein: the centrifugal ball (43) is a ceramic ball.

4. A post-blind explosive handling safe small bore rotary warhead mechanical triggering fuse according to claim 3, wherein: the outer wall of the lower part of the ball seat (63) is provided with a circle of flange, the bottom end of the body (1) is inwardly closed to the flange to fix the ball seat (63), so that the connection strength between the ball seat (63) and the body (1) is improved, and the structural integrity and the safety under the superposition effect of the emission impact overload and the explosion-proof internal pressure are ensured.

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