CN114963899A

CN114963899A - Safety type forest rocket fire extinguishing bomb warhead mechanical trigger fuse

Info

Publication number: CN114963899A
Application number: CN202210620677.XA
Authority: CN
Inventors: 王雨时; 徐浩茗; 闻泉
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-08-30
Anticipated expiration: 2042-06-02
Also published as: CN114963899B

Abstract

The invention discloses a safety type mechanical trigger fuse for a forest rocket fire extinguishing bomb warhead, which utilizes the head space of the fire extinguishing bomb, is approximately in a truncated cone shape, is used for detonating a central pipe explosion of the forest rocket fire extinguishing bomb and further throwing out a fire extinguishing agent, and comprises a protective cap, a fuse body, a bumping firing module, a centrifugal safety module, a rotor seat module, a recoil pin safety module, a recoil safety mechanism module, a safety lever safety module and an inertia firing module. The fuse is relieved by manual operation, recoil, rotation and head-on airflow, and the principle of relieving the safety time window, fault safety and the like is utilized to ensure that the fuse is not relieved before the active section of the shot, so that the safety design under the weak emission environment can be realized, and the related requirements of GJB373B-2019 fuse safety design criteria are met. The fuse has two ignition modes of impact triggering and inertia triggering, has a small-falling-angle triggering function, and is high in action reliability; meanwhile, the explosive has a fire-proof function, and can ensure the safety of the treatment of unexploded explosive; the structure is simple, and the cost is low.

Description

Safety type forest rocket fire extinguishing bomb warhead mechanical trigger fuse

Technical Field

The invention belongs to the technical field of fire fighting and extinguishment, and particularly relates to a bullet mechanical trigger fuse of a safety type forest rocket fire extinguishing bomb.

Background

The forest fire is a natural disaster which has strong burst property and large destructive power and is difficult to deal with and rescue, particularly the forest fire is frequently generated due to the current climate change, which brings great pressure to forest fire prevention, and how to efficiently and safely suppress the forest fire becomes a worldwide problem. As a fire extinguishing device capable of projecting remotely, the forest rocket fire extinguishing bomb can greatly improve the fire extinguishing efficiency and reduce casualties. However, the fuze of the forest fire extinguishing bomb used at present, such as the fuze of the forest fire extinguishing bomb described in the Chinese invention patent 201521001707.0, has no safety and safety relief device in design, is equivalent to the ancient fuze 1 century ago, and does not meet the basic requirements of the safety design standard GJB373B-2019 "fuze safety design criteria", once a fuze is accidentally fired due to external stimuli such as electromagnetic interference, mechanical impact, high-temperature baking and the like in the storage and transportation processes, the fuze can detonate the central detonator of the fire extinguishing bomb fighting part and then detonate the adjacent fire extinguishing bombs (the central detonator of the fighting part and the explosive of the rocket engine), so that the accident explosion hazard which is more serious than the consequences of a forest fire exists. In addition, the fuse adopts an electromechanical principle, has shorter storage life than a mechanical trigger fuse, has higher cost than the mechanical trigger fuse, has no self-failure, fire-stopping and explosive handling characteristics, and has great potential accidental explosion hazards once the detonator is detonated and leaves unexploded ammunition, particularly in forest fire fields. Therefore, it is required to provide a fuse for a forest rocket fire-extinguishing bomb which is safe not only to prevent an accident of accidental ignition of the fuse during storage and transportation thereof but also to secure the safety of explosive treatment of the non-detonated bomb formed after misfire.

Disclosure of Invention

The invention aims to provide a mechanical trigger detonator for a bullet of a safety forest rocket fire extinguishing bomb, which can not only ensure that no accidental explosion accident occurs in the storage and transportation process of the bomb, but also ensure the safety of explosive treatment of the unexploded bomb formed after misfire.

The technical solution for realizing the purpose of the invention is as follows: a safety type mechanical trigger fuse for a forest rocket fire extinguishing bomb warhead comprises a protective cap, a fuse body, a collision firing module, a centrifugal safety module, a rotor base module, a recoil pin safety module, a recoil safety mechanism module, a safety lever safety module, two sets of inertia firing modules and three sets of centrifugal safety modules; a first stepped hole is formed in the top surface of the fuse body along the central axis of the fuse body downwards, and the first stepped hole, the second stepped hole, the third stepped hole, the fourth stepped hole, the fifth stepped hole, the sixth stepped hole, the seventh stepped hole and the eighth stepped hole are sequentially formed in the top surface of the fuse body; three second stepped holes are uniformly formed in the outer side wall of the fuse body along the circumferential direction, the second stepped holes are communicated with the sixth stepped holes, and the included angle between the central axis of each second stepped hole and the central axis of each first stepped hole is 90 degrees; the outer side wall of the fuse body is also provided with a third stepped hole communicated with an eighth stepped hole along the radial direction, the included angle between the central axis of the third stepped hole and the central axis of the first stepped hole is 90 degrees, and the bottom of the fuse body is eccentrically provided with a fourth stepped hole communicated with the third stepped hole along the axial direction; 6 first through holes with openings inclined upwards are uniformly distributed on the outer wall of the fuse body along the circumferential direction, the 6 first through holes are communicated with the fifth step hole of the fuse body, and the included angle between the central axis of each first through hole and the central axis of each first step hole is 45-80 degrees; the head of the fuse body is uniformly distributed with 6 first axial blind holes along the circumferential direction, each first axial blind hole is communicated with one first through hole, and the axes of each pair of the first axial blind holes and the first through holes which are communicated with each other are coplanar with the axis of the fuse body; the collision ignition module is arranged in a first stepped hole of the fuse body, the centrifugal safety module is arranged in a second stepped hole of the fuse body, the rotor seat module is arranged in an eighth stepped hole of the fuse body, the recoil pin safety module is arranged in the rotor seat module, the recoil safety mechanism module is arranged in a fourth stepped hole of the fuse body, and the bumper safety module is arranged in a third stepped hole of the fuse body; the fuze body is also provided with two second axial blind holes with the opening ends communicated with the eighth-order hole, the second axial blind holes are parallel to the seventh-order hole, the second axial blind holes are positioned above the rotor seat module and are far away from the second stepped holes, the second axial blind holes do not interfere with the second stepped holes, and each second axial blind hole is internally provided with a set of inertia ignition modules; the protective cap is sleeved on the outer side of the fuse body.

Compared with the prior art, the invention has the following remarkable advantages:

(1) by applying the principle of fuse release time window and fault insurance and organically combining various insurance mechanisms and fuse release mechanisms, the safety design of the fuze in the weak environment is realized, and the related requirements of GJB373B-2019 'fuze safety design criteria' standard are comprehensively met.

(2) The floor scrubbing and blasting ignition function is arranged, and the action reliability is improved.

(3) Has the function of fire insulation, and is beneficial to the safety of explosive treatment of unexplosive explosive.

Drawings

FIG. 1 is a sectional view of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb according to the embodiment of the invention.

Fig. 2 is a bottom view of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb of the invention.

Fig. 3 is a G-G section sectional view of a warhead mechanical trigger fuse of the safety type forest rocket fire extinguishing bomb.

Fig. 4 is a C-C section sectional view of a warhead mechanical trigger fuse of the safety type forest rocket fire extinguishing bomb of the invention.

Fig. 5 is a sectional view of the A-A section of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb of the invention.

Figure 6 is a cross-sectional view of the D-D section of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb of the invention,

fig. 7 is a sectional view of the section B-B of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb.

Fig. 8 is a sectional view of the H-H section of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb of the present invention.

Fig. 9 is a schematic structural diagram of specific parts of a safety rod safety module of a warhead mechanical trigger fuse of the safety type forest rocket fire extinguishing bomb.

Fig. 10 is a schematic structural diagram of specific parts of a recoil safety mechanism module of a warhead mechanical trigger fuse of the safety type forest rocket fire extinguishing bomb.

Figure 11 is an isometric view of the rotor of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb of the present invention.

In the figure, 1 is a protective cap, 2 is a fuse body, 3 is a strike firing module, 4 is a centrifugal fuse module, 5 is a rotor base module, 6 is a recoil pin fuse module, 7 is a bumper fuse module, 8 is a recoil fuse mechanism module, and 9 is an inertia firing module; 31 is a moisture-proof sheet, 32 is a striker, 33 is a striker spring, 34 is a retainer ring, 35 is a flare rod spring, 36 is a flare rod, 37 is a first needle piercing flare, 41 is a retainer screw, 42 is a centrifugal pin, 43 is a centrifugal spring, 51 is a bottom screw, 52 is a booster tube, 53 is a flame-proof mechanism, 61 is a recoil pin, 62 is a recoil spring, 63 is a gasket, 71 is a safety lever, 72 is a release spring, 73 is a coil, 74 is a steel washer, 75 is a rubber ring, 81 is a safety pin, 82 is a sleeve, 83 is a safety spring, 84 is a spring sleeve, 85 is a bottom-sealing press screw, 86 is a spring core, 91 is an inertia trigger mechanism, and 92 is an open-hole press screw; 52 is a booster, 531 is a rotor holder, 532 is a rotor, 533 is a rotor cover, 534 is a positioning pin, 535 is a screw, 536 is a first striker, 537 is a stopper pin, 538 is a torsion spring, 539 is a flame detonator, 911 is a second striker, 912 is a striker spring, 913 is a second pin firing cap, 914 is a cap holder, 915 is a firing sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present invention.

Descriptions in this specification as relating to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to any indicated technical feature or quantity. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., "secured" may be fixedly connected, releasably connected, or integral; "connected" may be mechanically or electrically connected. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

With reference to fig. 1 to 11, the safety forest rocket fire extinguishing bomb warhead mechanical trigger fuse comprises a protective cap 1, a fuse body 2, a collision ignition module 3, a rotor seat module 5, a recoil pin safety module 6, a recoil safety mechanism module 7, a safety lever safety module 8, two sets of inertia ignition modules 9 and three sets of centrifugal safety modules 4; a first stepped hole is formed downwards from the top surface of the fuse body 2 along the central axis thereof, and the first stepped hole, the second stepped hole, the third stepped hole, the fourth stepped hole, the fifth stepped hole, the sixth stepped hole, the seventh stepped hole and the eighth stepped hole are sequentially formed; three second stepped holes are uniformly formed in the outer side wall of the fuse body 2 along the circumferential direction, the second stepped holes are communicated with the sixth stepped hole, and an included angle formed by the central axis of each second stepped hole and the central axis of each first stepped hole is 90 degrees; the outer side wall of the fuze body 2 is also provided with a third stepped hole communicated with an eighth stepped hole along the radial direction, the included angle between the central axis of the third stepped hole and the central axis of the first stepped hole is 90 degrees, and the bottom of the fuze body 2 is eccentrically provided with a fourth stepped hole communicated with the third stepped hole along the axial direction; 6 first through holes with openings inclined upwards are uniformly distributed on the outer wall of the fuse body 2 along the circumferential direction, the 6 first through holes are communicated with the fifth step hole of the fuse body 2, and an included angle between the central axis of each first through hole and the central axis of each first step hole is 45-80 degrees; 6 first axial blind holes are uniformly distributed in the head of the fuse body 2 along the circumferential direction, each first axial blind hole is communicated with one first through hole, and the axial line of each pair of the first axial blind holes and the first through holes which are communicated with each other is coplanar with the axial line of the fuse body 2; the bumping ignition module 3 is arranged in a first stepped hole of the fuse body 2, the centrifugal safety module 4 is arranged in a second stepped hole of the fuse body 2, the rotor seat module 5 is arranged in an eighth stepped hole of the fuse body 2, the recoil pin safety module 6 is arranged in the rotor seat module 5, the recoil safety mechanism module 7 is arranged in a fourth stepped hole of the fuse body 2, and the safety lever safety module 8 is arranged in the third stepped hole of the fuse body 2; the fuze body 2 is also provided with two second axial blind holes with the opening ends communicated with the eighth-order hole, the second axial blind holes are parallel to the seventh-order hole, the second axial blind holes are positioned above the rotor seat module 5 and are far away from the second stepped holes, the second axial blind holes do not interfere with the second stepped holes, and each second axial blind hole is internally provided with a set of inertia ignition modules 9; a first spanner groove is formed in the side surface of the fuse body 2; the protective cap 1 is sleeved outside the fuse body 2, and a second wrench groove is formed in the side face of the protective cap, so that the protective cap and the fuse body 2 can be assembled conveniently.

The bumping firing module 3 is a bumping triggering mechanism or a pneumatic safety relief mechanism of the rotor base module 5; the pneumatic safety release mechanism of the impact triggering mechanism and the rotor seat module 5 is only called differently from different functional angles and comprises a moisture-proof sheet 31, a striking rod 32, a striking rod spring 33, a retainer ring 34, a fire cap rod spring 35, a fire cap rod 36 and a first needle firing cap 37, wherein the moisture-proof sheet 31 is positioned in a first step hole of the fuse body 2, the striking rod 32 and the striking rod spring 33 are both positioned in a second step hole, and the retainer ring 34 is positioned in a third step hole and is limited by a step surface between the third step hole and a fourth step hole; the fire cap rod spring 35 is positioned in the fourth-step hole, the fire cap rod 36 is positioned in the fourth-step hole, the fifth-step hole, the sixth-step hole, the seventh-step hole and the eighth-step hole, and the head of the fire cap rod 36 is limited through a step surface between the fourth-step hole and the fifth-step hole; the striker 32 is composed of a first cylinder and a second cylinder with diameters decreasing from top to bottom, the diameter of the first cylinder is larger than that of the second cylinder, and a circle of groove is formed on the circumferential outer wall of the first cylinder. The striking rod spring 33 is sleeved on the second cylinder of the striking rod 32, one end of the striking rod spring is abutted against the lower end ring surface of the first cylinder, the other end of the striking rod spring is abutted against the upper end surface of the retainer ring 34, one end of the fire cap rod spring 35 is abutted against the bottom surface of the retainer ring 34, the other end of the fire cap rod spring is abutted against the top surface of the fire cap rod 36, and the striking rod spring 33 and the fire cap rod spring 35 are both in a pre-pressing state; the fire cap rod 36 is composed of a third cylinder, a fourth cylinder, a fifth cylinder, a sixth cylinder and a seventh cylinder which are sequentially arranged from top to bottom, a fillet is arranged at the joint of the fourth cylinder and the fifth cylinder, a fillet is also arranged at the joint of the fifth cylinder and the sixth cylinder, an annular groove is arranged on the sixth cylinder, and the centrifugal safety module 4 extends into the annular groove to realize centrifugal safety; a frustum is arranged at the intersection of the sixth cylinder and the seventh cylinder, and a first needle firing cap 37 is arranged at the output end of the bottom of the seventh cylinder downwards and extends into the axial through groove of the rotor seat module 5 to serve as a first firing explosion element for triggering firing; after the fuse is launched, the fuse can rotate at a low speed along with the fire extinguishing rocket projectile, the centrifugal safety module 4 relieves the safety, air can enter from the 6 first axial blind holes and the 6 first through holes of the fuse body 2 during air flight, a high-pressure area and a low-pressure area can be formed on the upper side and the lower side of the third cylinder of the fire cap rod 36, the generated pressure difference can lift the fire cap rod 36 to move upwards, so that the safety of the rotor base module 5 is relieved, and after the fuse impacts a target, the impact rod 32 downwards compresses the impact rod spring 33 under the action of impact force of the target ground, and further impacts the fire cap rod 36 to downwards complete impact triggering.

The second stepped hole is a three-step through hole with the diameter decreasing from outside to inside, and is sequentially a ninth step hole, a tenth step hole and an eleventh step hole; the centrifugal safety module 4 is a centrifugal safety mechanism for a pneumatic safety release mechanism, and comprises a centrifugal pin 41, a stop screw 42 and a centrifugal spring 43, wherein the centrifugal spring 43 is sleeved on the centrifugal pin 41 and is pre-pressed into a tenth-step hole; the head of the centrifugal pin 30 is provided with an annular boss which is used for matching with a step surface between the tenth-step hole and the eleventh-step hole to realize limiting, the inner end head is cylindrical, and the inner end head extends into the sixth-step hole; a retaining screw 42 positioned in the ninth-step hole is fixed at the outer end of the centrifugal pin 30 and used for realizing the restraint of the centrifugal pin 30 along the radial direction of the fuse, and the outer end head of the centrifugal pin 30 is hemispherical and is in contact with and limited by the inner wall of the protective cap 1; after the fuse is fired, the centrifugal pin 41 moves outward relative to the fuse body 2 by the centrifugal force to compress the centrifugal spring 43, and the centrifugal pin 41 releases the fuse from the primer rod 36 after being separated from the primer rod 36.

The rotor base module 5 comprises a bottom screw 51, an explosion-proof mechanism 53 and two explosion-conducting tubes 52, the mouth parts of the two explosion-conducting tubes 52 are oppositely overlapped at the bottom of the center of the explosion-proof mechanism 53, and the explosion-proof mechanism 53 is fixed in an eighth step hole at the bottom of the first step hole through the bottom screw 51.

The explosion-proof mechanism 53 comprises a rotor seat 531, a rotor 532, a rotor cover 533, a first striker 536, a rotation stopping pin 537, a torsion spring 538, a flame detonator 539, two positioning pins 534 and two screws 535; the fuze body 2 is eccentrically provided with a third axial blind hole with two open ends communicated with the eighth-step hole along the axial direction, the top end of the positioning pin 534 is pressed into the third axial blind hole, the lower end of the positioning pin 534 downwards penetrates through the rotor cover 533 and extends into a preset blind hole of the rotor seat 531, and the rotor seat 531 is prevented from rotating relative to the fuze body 2, so that the direction positioning required by the asymmetric structure is realized; a bottom screw 51 in threaded connection with the detonator body 2 is sleeved below the rotor seat 531, and the explosion-proof mechanism 53 and the detonating tube 52 are fixed in the detonator body 2; a fifth stepped hole is formed in the center of the top surface of the rotor holder 531, and the fifth stepped hole is an eighteenth-step hole and a nineteenth-step hole from top to bottom, the rotor 532 is arranged in the fifth stepped hole, and the rotating shaft of the rotor 532 extends upwards out of the rotor cover 533, so that the rotor cover 533 is positioned on the top surface of the rotor 532 main body; a second through hole is formed in the bottom of the rotor seat 531 in an eccentric mode along the axial direction; the bottom of the rotor seat 531 is eccentrically provided with a sixth stepped hole with sequentially decreasing diameters from bottom to top, a twentieth stepped hole, a twenty-first stepped hole and a twenty-twelfth stepped hole in sequence along the axial direction, and the recoil pin safety module 6 is arranged in the sixth stepped hole; the second through hole is parallel to the sixth stepped hole; a fourth axial blind hole is formed in the bottom of the rotor seat 531 along the central axis of the fuse body 2, and the booster 52 is arranged in the fourth axial blind hole; a third through hole communicated between the eighteenth-step hole and the twenty-second-step hole is formed in the outer side surface of the rotor seat 531 in the radial direction, and the upper part of the safety lever safety module 7 is arranged in the third through hole; the rotor 532 is composed of an eighth cylinder, a ninth cylinder, a tenth cylinder, an eleventh cylinder and a twelfth cylinder from top to bottom, the eighth cylinder penetrates through the rotor cover 533, the ninth cylinder, the tenth cylinder and the eleventh cylinder are arranged in an eighteenth-order hole, the twelfth cylinder is arranged in a nineteenth-order hole, an axial through groove is formed in the eighth cylinder, and the eleventh cylinder is limited by a step surface between the eighteenth-order hole and the nineteenth-order hole; the rotor 532 is provided with a fourth through hole along the axial direction in an eccentric way, the rotor cover 533 is provided with a fifth through hole along the axial direction in an eccentric way, and the second through hole, the fourth through hole and the fifth through hole are coaxial and are used for realizing the axial positioning of the rotor seat 531, the rotor 532 and the rotor cover 533 during the assembly; the rotor 532 is provided with two sixth through holes with the same diameter for adjusting the radial mass center position of the rotor part; a seventh stepped hole is formed in the top surface of the rotor 532 from top to bottom and sequentially comprises a thirteenth-step hole, a twenty-fourth-step hole, a twenty-fifth-step hole, a twenty-sixth-step hole and a twenty-seventh-step hole, the first striker 536 is riveted in the twenty-fourth-step hole and limited by a step surface between the twenty-fourth-step hole and the twenty-fifth-step hole, four eccentric fire-transmitting holes are uniformly distributed in the first striker 536, the striker is upwards arranged, and the output end of the flame detonator 539 is fixedly riveted in the twenty-seventh-step hole downwards; the rotor seat 531 is provided with a pressure relief blind hole right below the flame detonator 539, so that after the flame detonator 539 is accidentally exploded, the internal pressure of the detonator is guaranteed to be attenuated, and the detonator cannot be disassembled and cannot generate dangerous fragments to the outside; an eccentric axial through groove is formed in the rotor 532 and is used for being matched with a chamber contact safety release mechanism and a pneumatic safety release mechanism, namely a safety rod 71 and a fire cap rod 36, and the rotor 532 is fixed at an assembly position to realize redundant safety; a bulge is arranged at the opening part of the eccentric axial through slot on the rotor 532 to realize fault insurance; a fifth axial blind hole which is symmetrical about the central axis of the seventh stepped hole is formed in the top surface of the rotor 532, the rotation stopping pin 537 is in a stepped shaft shape, the large end of the rotation stopping pin is pressed into the fifth axial blind hole and is riveted and fixed by a point, the small end of the rotation stopping pin passes through the rotor cover 533, and the small end of the rotation stopping pin is positioned in an arc-shaped groove formed in the rotor cover 533; the rotor cover 533 is fixed to the rotor holder 531 by two screws 535 and two positioning pins 534; the torsion spring 538 is in a pre-twisting state, one end of the torsion spring is sleeved in the through groove at the shaft end of the rotor 532, and the other end of the torsion spring is clamped in a concave groove formed by the protrusion of the rotor cover 533 through a spring head of the torsion spring and clings to the protrusion; after the recoil pin safety module 6, the recoil safety mechanism module 8, the safety lever safety module 7, the centrifugal safety module 4 and the percussion firing module 3 are all relieved of safety according to time sequence, the rotor 532 rotates clockwise (looking down from the head of the fuse body 2) under the action of the pre-twisting moment of the torsion spring 538, and the rotor 532 enables the first firing pin 536 to be opposite to the fire cap rod 36 to prepare for firing the first needle firing cap 37 at the bottom of the fire cap rod 36.

The third step hole is a third-order through hole with the diameter decreasing from outside to inside, and is a twelfth step hole, a thirteenth step hole and a fourteenth step hole in sequence, the safety lever safety module 7 is a chamber-touching relief mechanism of the explosion-proof mechanism 52, and comprises a safety lever 71, a relief spring 72, a spiral coil 73, a steel washer 74 and a rubber ring 75, which are radially arranged in the third step hole, more than half of which extend into the rotor seat 531 and are used for performing chamber-touching safety and chamber-out relief safety on the rotor 532; the safety rod 71 is a rotary body, the middle of the safety rod 71 is thicker and approximately enlarged, the front end of the safety rod 71 extends into a radial groove of the rotor 532, the middle of the safety rod passes through the third through hole, the tail part of the safety rod 71 is arranged in the twelfth-order hole, the thirteenth-order hole and the fourteenth-order hole, the tail end of the safety rod is close to the inner wall of the protective cap 1, and the inner wall of the protective cap 1 provides transportation safety for the safety rod 71; the steel gasket 74 and the sealing ring 75 are arranged in a stacked mode and pressed on the step surface between the twelfth-order hole and the thirteenth-order hole, and the tail of the safety rod 71 penetrates through central through holes of the steel gasket 74 and the sealing ring 75; the helicoidal ring 73 positioned in the twelfth-order hole is tightly attached to the outer side of the steel washer 74, the tail end of the safety rod 71 penetrates through the helicoidal ring 73, and the helicoidal ring 73 is in threaded connection with the fuse body 2 and is used for compressing the sealing ring 75 and the steel washer 74; the relief spring 72 is pre-pressed and then arranged in the thirteenth-order hole of the fuse body 2, one end of the relief spring 72 is pressed against the step surface between the thirteenth-order hole and the fourteenth-order hole, and the other end of the relief spring is pressed against the inner annular end surface of the middle expansion part of the safety rod 71.

The recoil pin safety module 6 is a recoil pin-spring safety mechanism of a contact chamber relief safety mechanism, and comprises a recoil pin 61, a recoil spring 62 and a gasket 63; the recoil pin 61 is positioned in the twenty-first-step hole and the twenty-second-step hole and limited by a step surface between the twenty-first-step hole and the twenty-second-step hole, and the front end part of the recoil pin (61) passes through a radial hole of the bumper 71 and extends into the twenty-second-step hole, so as to realize recoil safety for the bumper safety module 7; the recoil spring 62 is in a pre-pressing state during assembly, the upper part of the recoil spring is propped against the recoil pin 61, the lower part of the recoil spring is propped against the gasket 63, and the gasket 63 is fixed in the twenty-second stepped hole through spot riveting; after the fuse is fired, the recoil pin 61 moves backward relative to the fuse body 2 by the recoil force to compress the recoil spring 62, and after the upper end surface of the recoil pin 61 leaves the radial hole of the safety lever 71, the safety of the safety lever 71 is released.

The fourth stepped hole is a three-step through hole with the diameter decreasing from bottom to top, and is a fifteenth-step hole, a sixteenth-step hole and a seventeenth-step hole in sequence; the recoil safety mechanism module 8 is a double-degree-of-freedom recoil safety mechanism with a fault safety function for a contact chamber relief safety mechanism, and comprises a safety pin 81, a sleeve 82, a spring sleeve 84, a back cover pressing screw 85, a spring core 86 and two safety springs 83, wherein the recoil safety mechanism is arranged in a fourth stepped hole, and all parts of the recoil safety mechanism are coaxial; the upper end surface of the sleeve 82 is tightly attached to the step surface between the sixteenth-order hole and the seventeenth-order hole, and the lower end surface of the sleeve is tightly attached to the bottom of the blind hole of the bottom sealing press screw 85 in threaded connection with the fuse body 2; the bottom end face of the spring core 86 is tightly attached to the bottom of the blind hole of the bottom sealing pressing screw 85, and the radial positioning, closing and fixing are realized by the stepped step at the lower end of the sleeve 82; the safety pin 81 is composed of a thirteenth cylinder, a fourteenth cylinder, a fifteenth cylinder and a sixteenth cylinder from top to bottom, a fillet is arranged at the joint of the thirteenth cylinder and the fourteenth cylinder, a fillet is also arranged at the joint of the fourteenth cylinder and the fifteenth cylinder, a sixth axial blind hole is upwards arranged at the bottom of the sixteenth cylinder, the top surface of the thirteenth cylinder is tightly attached to the outer cylindrical surface of the safety rod 71 above the thirteenth cylinder, and the sixteenth cylinder is positioned in the sleeve 82; the spring sleeve 84 is positioned in the sixth axial blind hole, and a through hole is formed in the center of the spring sleeve 84; the two safety springs 83 are in a pre-pressing state and are respectively positioned right above and right below the spring sleeve 84, wherein the top ends of the safety springs 83 positioned right above are abutted against the bottom of the sixth axial blind hole, and the bottom ends of the safety springs 83 positioned right below are abutted against the inner ring surface of the spring core 86; after the fuse is fired, the safety pin 81 moves backwards relative to the fuse body 2 under the action of the recoil force to compress the safety spring 83, and the upper end surface of the safety pin 81 is separated from the safety rod 71 and is lower than the wall of the thirteenth-step hole, so that the safety of the safety rod 81 is relieved.

The inertia ignition module 9 comprises an inertia trigger mechanism 91 and an open pore pressing screw 92, wherein the inertia trigger mechanism 91 comprises a second firing pin 911, a firing pin spring 912, a second pin firing cap 913, a firing cap seat 914 and a firing sleeve 915; the fire cap seat 914 is provided with a first central fire transfer hole, the striking sleeve 915 is provided with a second central fire transfer hole, the tapping press bolt 92 is provided with a third central fire transfer hole, and the first central fire transfer hole, the second central fire transfer hole and the third central fire transfer hole are communicated with each other in the same diameter to form a central fire transfer channel for outputting flame of the second acupuncture fire cap 913; a central stepped hole is formed in the fire cap base 914, a second acupuncture fire cap 913 is mounted at the front end of the fire cap base 914, and a first central fire transfer hole is formed behind the fire cap base 914; the fire cap seat 914 is arranged in the firing sleeve 915, a second firing pin 911 is fixed on the same side of the firing sleeve 915 as the second acupuncture fire cap 913, a pre-pressing firing pin spring 912 is arranged between the second firing pin 911 and the fire cap seat 914, and the pressing height of the firing pin spring 912 is smaller than the length of the tip of the second firing pin 911; the hole-opening pressing screw 92, the firing sleeve 915, the fire cap seat 914, the second acupuncture fire cap 913, the firing pin spring 912 and the second firing pin 911 are coaxially arranged; the second firing pin 911 is positioned by the step of the mouth part of the firing sleeve 915 and is fixed by the mouth part closing in; after the fuse strikes a target, the fire cap holder 914 with the second acupuncture cap 913 therein moves forward under the forward impact overload to compress the firing pin spring 912, so that the second firing pin 911 pierces the second acupuncture cap 913 in the fire cap holder 914, and then passes the fire backwards through the central fire passing through holes of the fire cap holder 914, the firing sleeve 912 and the open hole press screw 92, and then passes the fire backwards into the chamber of the rotor holder 531, and finally detonators 539 in the rotor 532 are detonated.

The main safety principle of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb provided by the invention is as follows:

the warhead mechanical trigger fuse of the safety type forest rocket fire extinguishing bomb is a fuse based on a pure mechanical principle, so that the safety and the reliability of the fuse are not influenced by an electromagnetic environment and electromagnetic interference.

During the service treatment, the fuse is in an explosion-proof state, namely a factory assembly state, and the fuse is subjected to credible impact and vibration, including accidental falling, transportation vibration and the like, so that the fuse cannot be accidentally relieved from insurance and accidental explosion. The recoil pin safety module 6 and the recoil safety mechanism module 7 can ensure that the fuse cannot be relieved when the fuse accidentally falls to the ground, namely, the safety pin 81 and the recoil pin 61 cannot accidentally relieve the safety of the safety lever 71, and the safety lever 71 cannot further relieve the safety of the rotor 532. The three redundant sets of centrifugal fuse modules 4 clamp the fuse rod 36 so that even if the fuse falls accidentally into the centrifugal fuse modules 4, the fuse rod 36 is not relieved of the fuse rod 36, and the fuse rod 36 is not further relieved of the fuse to the rotor 532, i.e., the fuse is not relieved of the fuse accidentally. In case the fuse head accidentally falls down on the ground, the firing pin spring 912 in the inertia trigger mechanism 91 ensures that the second acupuncture cap 913 in the cap holder 914 does not hit the second firing pin 911, thereby firing the second acupuncture cap 913. The rotor 532 cannot be relieved by the failure of any single safety mechanism, namely the rotor 532 cannot be rotated rightly accidentally, and the safety of the fuse under the condition that the reliability of the safety mechanism fails is ensured. In the case where the rotor 532 is not relieved of safety, the first needle ignition cap 37 located at the bottom of the cap rod 36 is offset from the axis of the first firing needle 536, and even if the first needle ignition cap 37 in the cap rod 36 is accidentally fired, only the flame impulse is output from the first needle ignition cap 37, and the booster tube 52 below the partition plate directly opposite to the first needle ignition cap 37 is not triggered. Under the condition that the rotor 532 is not relieved of safety, the axis of the booster 52 is staggered with the axis of the flame detonator 539, and even if the flame detonator 539 riveted in the twenty-seventh-order hole is accidentally ignited and exploded or any one or more of the first needle-pricked fire cap 37 and the second needle-pricked fire cap 913 in the detonator are accidentally ignited to further ignite the flame detonator 539 in the twenty-seventh-order hole, the flame detonator 539 cannot ignite the booster 52, and the detonator is explosion-proof and safe and is in an explosion-proof state. A pressure relief blind hole is formed in the rotor seat 531 below the flame detonator 539, so that after the flame detonator 539 is accidentally fired and exploded, the internal pressure of a fuse can be guaranteed to be attenuated, and the fuse cannot be disassembled and cannot generate dangerous fragments to the outside.

The protective cap 1 is sleeved on the fuse body 2 and is in threaded connection with the fuse body 2, on one hand, the centrifugal pin 42 of the pneumatic fuse relieving mechanism of the fuse and the safety rod 71 of the contact chamber relieving mechanism are blocked, so that service processing insurance is realized, on the other hand, 6 first axial blind holes and 6 first through hole air inlet channels on the fuse body 2 are blocked, and the requirement of fuse storage tightness is met. Even if the protective cap 1 is accidentally loosened, the three redundant centrifugal safety modules 4 will catch the fire cap rod 36, thus ensuring reliable safety. The three sets of redundant centrifugal fuse modules 4 are reversible in motion, so that the safety of the fuse in the credible transportation and falling impact environments can be ensured. The moisture-proof sheet 31 above the striker 32 plays a role of sealing and moisture-proof, and can block the entrance of the head-on airflow and axially position the striker 32. The centrifugal fuse module 4, which is composed of the centrifugal pin 42, the centrifugal spring 43 and the catch screw 41, limits the axial movement of the primer rod 36. Under normal conditions, the arming action of the recoil pin arming module 6, i.e., the recoil pin-spring arming mechanism, and the arming action of the safety lever 71 are independent of each other and do not affect each other. Before the protective cap 1 is not removed, the safety pin 81 and the recoil pin 61 can both perform safety protection on the safety rod 71 in a reversible mode, namely in the process of accidental falling of a fuse head upwards and transportation shock impact, the safety pin 81 and the recoil pin 61 can release the safety protection on the safety rod 71, but after the falling and transportation shock impact disappears or basically disappears, the safety pin 81 and the recoil pin 61 respectively reset under the action of the safety spring 83 and the recoil spring 62, and the safety protection on the safety rod 71 is restored.

In the normal launching process, the fuse is firstly installed on the head of the fire extinguishing rocket projectile through the connecting thread, and then the protective cap 1 is removed. That is, the fuse removed from the protective cap 1 is screwed on the fire extinguishing rocket projectile, and if the head of the fuse falls down unexpectedly, the safety of the safety lever 71 may be released by the recoil pin-spring safety mechanism and the recoil safety mechanism at the same time, or the safety of the recoil pin-spring safety mechanism is not released by the recoil safety mechanism due to the adoption of the two-degree-of-freedom structure principle, and only the recoil pin-spring safety mechanism is released. If the recoil safety mechanism and the recoil pin-spring safety mechanism are simultaneously relieved, the safety rod 71 can move outwards under the action of the relief spring 72, the safety rod 71 extends out of the outer contour of the fuse body 2, meanwhile, the safety rod 71 relieves the safety of the rotor 532, but the rotor 532 also has the safety restraint provided by the cap rod 36, at the moment, the safety rod 71 extending out of the outer contour of the fuse body 2 enables the maximum outer diameter of the fuse to exceed the inner diameter, namely the caliber, of the rocket launching tube, and the fire extinguishing rocket projectile equipped with the fuse cannot normally complete the loading action of the chamber, so that the launching process of the fire extinguishing rocket projectile is forced to be stopped. If only the recoil pin-spring safety mechanism releases the safety and the recoil safety mechanism does not release the safety, the safety rod 71 moves outwards under the pushing of the release spring 72, so that the thirteenth cylinder is clamped into the annular groove of the expanded part in the middle of the safety rod 71, the safety pin 81 is interlocked with the safety rod 71, the safety pin 81 cannot release the safety of the safety rod 71, the rotor 532 is still locked by the safety rod 71 to be in an explosion-proof state, then the fuse enters a fault safety state, namely a failure safety state, the safety of the fuse in a service treatment stage and an explosive treatment stage is ensured, meanwhile, the safety rod 71 also extends out of the outer contour of the fuse body 2, the maximum outer diameter of the fuse exceeds the inner diameter, namely the caliber, of the rocket, the fire extinguishing rocket bomb provided with the fuse cannot normally complete the chamber feeding and filling actions, and the launching process of the fire extinguishing rocket bomb is also forced to be stopped.

If the safety function of the recoil pin-spring safety mechanism is accidentally disabled in the service treatment process, for example, the recoil spring 62 is broken or neglected to be installed, the recoil pin 61 moves downwards under the impact overload action such as transportation vibration and the like to be separated from the safety rod 71, the recoil pin 61 loses the restraint action on the safety rod 71, once the protective cap 1 is screwed off, the safety rod 71 moves outwards under the action of the release spring 72, the annular groove of the expanded part of the safety rod 71 clamps the thirteenth cylinder, the safety rod 71 is interlocked with the safety pin 81, the safety rod 71 cannot release the rotor 532, the outer end of the safety rod 71 extends out of the outer contour of the fuse and exceeds the inner diameter of the launching tube, the fire extinguishing rocket projectile cannot be loaded into the launching tube any more, the preset launching tube is forced to be stopped, and the fuse is in a fault safety state, namely a failure safety state.

If the safety function of the recoil safety mechanism is accidentally failed in the service treatment process, such as the safety spring 42 is broken or neglected or seldom installed, the safety pin 81 moves downwards under the impact overload effect of transportation vibration and the like to be separated from the safety rod 71, the safety pin 81 loses the potential restraint effect on the safety rod 71, once the protective cap 1 is screwed off, the safety rod 71 moves outwards under the effect of the safety spring 72, the outer end of the safety rod 71 extends out of the outer contour of the fuse and exceeds the inner diameter of the launching tube, the fire extinguishing rocket bomb cannot be loaded into the launching tube any more, the scheduled launching is forced to be stopped, the fuse inner rotor 532 is still restrained by the fuse cap rod 36, and the fuse is also in a fail-safe state.

If the flame rod 36 and the safety lever 71 or parts thereof are not fitted during the assembly process, an abnormality is found in the following other assembly process or step, or can be found in the following visual inspection and parts count management, thereby being avoided.

Similarly, if the rotor 532 is accidentally erroneously mounted in the non-safety state during the assembly process, an abnormality is found in other subsequent assembly processes or steps, and a subsequent visual inspection can be found to avoid the abnormality.

The rotor 532 is the primary explosion proof member within which is located a sensitive explosive element flame detonator 539 for initiating the booster 52. The flame rod 36 and the safety lever 71 are direct safeties of the rotor 532, independent of each other. The indirect safety elements of the rotor 532 include the direct safety elements of the fuse rod 36, i.e. the centrifugal safety module 4 and the protective cap 1, and the direct safety elements of the safety rod 71, i.e. the recoil safety mechanism, the recoil pin-spring safety mechanism, the rocket launcher bore wall and the protective cap 1. The safety relief environment of the fire cap rod 36 comprises manual unscrewing of the protective cap 1, rotation of the fire extinguishing rocket projectile by the offset tail wing when the work of the rocket engine outside the chamber is finished, and head-on air pressure generated by flight airflow of the fire extinguishing rocket projectile. The safety relief environment of the safety rod 71 comprises manual unscrewing of the protective cap 1, recoil overload and ejection of the fire extinguishing rocket chamber. The redundancy insurance characteristics required by the GJB373B-2019 fuze safety design criteria standard are met accordingly.

If the fuse of the fuse rod 36 to the rotor 532 is to be released, a rotating environment and a forward impact environment are required at the same time, and the fuse cannot be simultaneously applied by manual operation, even if the environments are weak, so that the fuse has the design characteristic of not releasing the fuse by hand.

The main working process of the warhead mechanical trigger fuse of the safety forest rocket fire extinguishing bomb comprises the following steps:

before the fire extinguishing rocket bomb is launched, the protective cap 1 which is sleeved on the fuse body 2 in a threaded manner is screwed off by a special wrench.

When the fire extinguishing rocket projectile is launched, the recoil pin 61 of the recoil pin-spring mechanism in the rotor seat 531 compresses the recoil spring 62 downward by the recoil force to move downward until the foremost end of the recoil pin 61 is completely separated from the radial hole of the safety lever 71, and the recoil pin 61 releases the safety of the safety lever 71. Similarly, the safety pin 81 and the sleeve 82 in the recoil safety mechanism module 8 compress 2 series-connected safety springs 83 under the action of recoil force, i.e. the two-degree-of-freedom recoil safety mechanism moves downwards until the upper end surface of the thirteenth cylinder enters the seventeenth-order hole, i.e. the height of the upper end surface of the safety pin 81 is lower than that of the hole wall of the thirteenth-order hole, and the safety pin 81 releases the safety of the safety rod 71.

The fire extinguishing rocket projectile flies out of the barrel, and the safety rod 71 loses the restraint function of the inner bore of the launching tube. However, since the fire-extinguishing rocket projectile still accelerates under the propulsion of the rocket engine, the safety lever 71 is still in its assembled position under the influence of the frictional force generated by the recoil force restraining reaction force. At a certain moment in the process of thrust attenuation near the end of combustion of the rocket engine, the recoil received by the safety rod 71 and the friction thereof are reduced and are not enough to resist the thrust action of the relief spring 72, and then the safety rod is pushed by the relief spring 72 to move outwards and extend out of the position with the maximum outer contour of the fuse body 2, so that the rotor 532 is released. In the process, the fuse pin 81 and the recoil pin 61 still compress the fuse spring 83 and the recoil spring 62 under the action of recoil force, the fuse spring 83 and the recoil spring 62 are still not reset, and the fuse pin 81 and the recoil pin 61 do not block the movement of the fuse rod 71.

Under the action of the inclined tail wing, when the rotating speed of the fire extinguishing rocket projectile is close to the maximum value, the centrifugal pin 42 in the centrifugal safety module 4 compresses the centrifugal spring 43 to move outwards under the action of centrifugal force until the foremost end of the centrifugal pin 42 is completely separated from the annular groove on the fire cap rod 36, and the centrifugal pin 42 releases the safety of the fire cap rod 36.

In the flying process of the fire extinguishing rocket projectile, air enters the inside of the fuse through the 6 first axial blind holes and the 6 first through holes of the fuse body 2 in the form of head-on airflow, and a high-pressure area and a low-pressure area are formed on the upper side and the lower side of the third cylinder of the fire cap rod 36, so that a pressure difference is generated. Theoretically, the acceleration process stops when the combustion of the rocket engine is finished, the speed of the fire extinguishing rocket is the maximum, and the pressure difference formed by the aerodynamic force on the upper surface and the lower surface of the third cylinder of the fire cap rod 36 is also the maximum. Before the combustion of the rocket engine is finished, the fire extinguishing rocket shell accelerates, the recoil of the fire cap rod 36 and the fire cap rod spring 35 above the fire cap rod can prevent the fire cap rod 36 from moving upwards under the action of aerodynamic pressure difference, and the fire cap rod 36 can not release the safety of the rotor 532. This feature essentially ensures that the fuze is not disarmed in the active section of the fire-fighting rocket projectile. Only after the rocket engine burns and sinters, the fire extinguishing rocket bomb stops accelerating movement, the fire cap rod 36 overcomes the pre-pressing resistance of the fire cap rod spring 35 and lifts upwards under the action of aerodynamic pressure difference so as to remove the safety of the rotor 532, namely, the part of the bottom of the fire cap rod 36 inserted into the axial through groove of the rotor 532 is completely separated from the rotor 532. The torsion spring 538 will then rotate the rotor 532 through a certain angle under the action of its pre-torque moment, so that the first striker 536 coincides or substantially coincides with the axis of the fire-cap rod 36, and the explosion sequence is aligned, i.e. the flame detonator 539 in the rotor 532 is aligned with the booster 52, and the detonator is unsecured and is in a primed state. The fire extinguishing rocket projectile has a large mass, a low speed and thus a small resistance, a strong speed storage capacity, and a frictional resistance also hinders the restoration of the helmet rod 36 after the safety is released, so that the helmet rod 36 stays at the safety release position thereafter.

After the fire extinguishing rocket bomb collides with the ground of the target area, the striker 32 in the fire module 3 is impacted by the impact force to compress the striker spring 33 downwards, and then the striker 32 collides with the cap rod 36 to make the cap rod 36 collide with the first firing pin 536 downwards, the first needle firing cap 37 at the bottom of the cap rod 36 is fired due to the penetration of the first firing pin 536, the output flame of the first firing pin 536 is transmitted to the input end of the flame detonator 539 on the rotor 532 through 4 offset fire transmission holes on the first firing pin 536, the flame detonator 539 fires and explodes the booster (poly black-14) in the subsequent booster tube 52, and then the central booster in the fire extinguishing rocket bomb is detonated, so that the fire extinguishing agent is thrown out, and the fuzing work is finished.

If the fire extinguishing rocket projectile falls to the ground, the first firing pin 536 cannot reliably fire the first firing cap 37 due to the accident, the firing cap seats 914 in the two sets of inertia trigger mechanisms 91 in the detonator body and the second firing cap 913 in the two sets of inertia trigger mechanisms can move forward under the action of forward impact overload to compress the firing pin spring 912, so that the second firing pin 911 fires the second firing cap 913, the fire is transmitted through the firing cap seats 914, the firing sleeve 915 and the central fire transmission through hole of the opening pressing screw 92, the flame detonators 539 in the rotor 532 are detonated, the flame detonators explode and detonate the explosive in the fire transmission tube 52, and finally the central tube in the fire extinguishing rocket projectile is detonated, and the detonator realizes a preset standby inertia trigger process. When the fire-extinguishing rocket bomb lands at a small falling angle, namely, rubs the ground, the two sets of redundant inertia trigger mechanisms 91 can still move according to the preset working process, so that the second firing pin 911 reliably pierces the second pin piercing cap 913 in the firing cap seat 914, and the reliable ground rubbing effect of the fuze is ensured. It is simply theorized that the minimum drop angle at which a small drop angle reliably fires is the friction angle of the fire cap 914 within its chamber, which is about arctan (0.15) =8.5 °.

If the pneumatic safety release mechanism releases the safety prior to the chamber contact safety release mechanism accidentally, that is, the safety is not released according to the predetermined time sequence, the torsion spring 538 rotates the rotor 532 through a certain angle (about 5-10 °) under the action of the pre-twisting moment, so that the eccentric shaft on the rotor 532 is clamped into the annular groove at the front end of the safety rod 71 through the through groove opening protrusion, the safety rod 71 is interlocked with the rotor 532, and the fuse enters a fail-safe state. The interlocking of the safety lever 71 with the rotor 532 is reliable because the center of mass of the rotor part is designed at the center of the rotation axis thereof, the dimensional accuracy of parts in the rotor part is high, the distribution of the center of mass positions is not large, and the rotor 532 rotates without additional inertia moment except the pretwisting moment of the torsion spring 538.

As long as one set of safety mechanism is not released, the rotor 532 will not be rotated and the fuse will not be ignited normally. However, the predetermined normal ignition function of the inertia trigger mechanism 91 is not affected, and an ignition-proof effect is formed, that is, the second needle cap 913 still detonates the flame detonators 539 in the non-rotated rotor 532, but the flame detonators 539 will not detonate the booster 52, and the detonators enter an ignition-proof state after being misfired, so that the safety of explosive processing can be ensured.

The effective carrier of the fire extinguishing rocket projectile is a fire extinguishing agent, the explosive charge in the central explosion tube is used for blasting and throwing the fire extinguishing agent, the explosive amount is small, an acceleration process is carried out after the fire extinguishing rocket projectile flies out of the body tube, and the fuse can release centrifugal safety and pneumatic safety, namely fuse cap rod safety, when the maximum speed point is close to, namely the combustion end point of a rocket engine, so that the structure and the principle realize the delay safety release characteristic of the fuse essentially.

The fuze explosion-propagation medicine adopts black-14, meets the requirements of GJB373B-2019 'fuze safety design criteria' on the fuze explosion-propagation medicine, and can ensure that the fuze cannot be fired accidentally to cause premature explosion under the assembly condition, during the service treatment and in the launching process.

The fuse adopts the principle of fuse release time window and fault safety, and realizes the safety design of the fuse under the weak launching environment through the organic combination of various safety mechanisms and fuse release mechanisms. Meanwhile, the fuse is provided with a standby inertia triggering function besides the collision triggering function, so that the action reliability is improved. In addition, the explosive has a fire insulation function, and the explosive treatment safety of unexploded ammunition can be ensured.

Claims

1. The utility model provides a safe type forest rocket fire extinguishing bomb warhead machinery trigger fuze which characterized in that: the fuse protector comprises a protective cap (1), a fuse body (2), a collision ignition module (3), a rotor seat module (5), a recoil pin safety module (6), a safety lever safety module (7), a recoil safety mechanism module (8), two sets of inertia ignition modules (9) and three sets of centrifugal safety modules (4); a first stepped hole is formed downwards on the top surface of the self-fuse body (2) along the central axis of the self-fuse body, and the first stepped hole, the second stepped hole, the third stepped hole, the fourth stepped hole, the fifth stepped hole, the sixth stepped hole, the seventh stepped hole and the eighth stepped hole are sequentially formed; three second stepped holes are uniformly formed in the outer side wall of the fuse body (2) along the circumferential direction, the second stepped holes are communicated with the sixth stepped holes, and the included angle between the central axis of each second stepped hole and the central axis of each first stepped hole is 90 degrees; the outer side wall of the fuse body (2) is also provided with a third stepped hole communicated with an eighth stepped hole along the radial direction, the included angle between the central axis of the third stepped hole and the central axis of the first stepped hole is 90 degrees, and the bottom of the fuse body (2) is eccentrically provided with a fourth stepped hole communicated with the third stepped hole along the axial direction; 6 first through holes with openings inclined upwards are uniformly distributed on the outer wall of the fuse body (2) along the circumferential direction, the 6 first through holes are communicated with the fifth step hole of the fuse body (2), and an included angle between the central axis of each first through hole and the central axis of each first step hole is 45-80 degrees; the head of the fuze body (2) is uniformly distributed with 6 first axial blind holes along the circumferential direction, each first axial blind hole is communicated with one first through hole, and the axial line of each pair of the mutually communicated first axial blind hole and the first through hole is coplanar with the axial line of the fuze body (2); the bumping ignition module (3) is arranged in a first stepped hole of the fuse body (2), the centrifugal safety module (4) is arranged in a second stepped hole of the fuse body (2), the rotor seat module (5) is arranged in an eighth stepped hole of the fuse body (2), the recoil pin safety module (6) is arranged in the rotor seat module (5), the recoil safety mechanism module (8) is arranged in a fourth stepped hole of the fuse body (2), and the safety lever safety module (7) is arranged in the third stepped hole of the fuse body (2); the fuse body (2) is also provided with two second axial blind holes with the opening ends communicated with the eighth-step hole, the second axial blind holes are parallel to the seventh-step hole, the second axial blind holes are positioned above the rotor base module (5), the second axial blind holes are arranged in a direction far away from the second stepped holes, the second axial blind holes are not interfered with the second stepped holes, and each second axial blind hole is internally provided with a set of inertia ignition modules (9); the protective cap (1) is sleeved outside the fuse body (2).

2. The mechanical trigger fuse of the warhead of the safety forest rocket fire extinguishing bomb according to claim 1, wherein: the bumping ignition module (3) comprises a moisture-proof sheet (31), a striking rod (32), a striking rod spring (33), a retainer ring (34), a fire cap rod spring (35), a fire cap rod (36) and a first needle-punched fire cap (37), wherein the moisture-proof sheet (31) is positioned in a first step hole of the fuse body (2), the striking rod (32) and the striking rod spring (33) are both positioned in a second step hole, and the retainer ring (34) is positioned in a third step hole and is limited by a step surface between the third step hole and a fourth step hole; the fire cap rod spring (35) is positioned in the fourth-step hole, the fire cap rod (36) is positioned in the fourth-step hole, the fifth-step hole, the sixth-step hole, the seventh-step hole and the eighth-step hole, and the head of the fire cap rod (36) is limited through a step surface between the fourth-step hole and the fifth-step hole; the striker (32) consists of a first cylinder and a second cylinder with diameters decreasing from top to bottom, the diameter of the first cylinder is larger than that of the second cylinder, and the circumferential outer wall of the first cylinder is provided with a circle of grooves; the collision rod spring (33) is sleeved on the second cylinder of the collision rod (32), one end of the collision rod spring is abutted against the lower end ring surface of the first cylinder, the other end of the collision rod spring is abutted against the upper end surface of the retainer ring (34), one end of the fire cap rod spring (35) is abutted against the bottom surface of the retainer ring (34), the other end of the fire cap rod spring is abutted against the top surface of the fire cap rod (36), and the collision rod spring (33) and the fire cap rod spring (35) are both in a pre-pressing state; the fire cap rod (36) is composed of a third cylinder, a fourth cylinder, a fifth cylinder, a sixth cylinder and a seventh cylinder which are sequentially arranged from top to bottom, a fillet is arranged at the intersection of the fourth cylinder and the fifth cylinder, a fillet is also arranged at the intersection of the fifth cylinder and the sixth cylinder, an annular groove is arranged on the sixth cylinder, and the centrifugal safety module (4) extends into the annular groove to realize centrifugal safety; a frustum is arranged between the sixth cylinder and the seventh cylinder, and a first acupuncture cap (37) is arranged at the output end of the bottom of the seventh cylinder downwards and extends into the axial through groove of the rotor seat module (5) to serve as a first explosion element for triggering ignition.

3. A safety forest rocket fire extinguishing bomb fuze according to claim 2, wherein: the second stepped hole is a three-step through hole with the diameter decreasing from outside to inside, and is sequentially a ninth step hole, a tenth step hole and an eleventh step hole; the centrifugal safety module (4) comprises a centrifugal pin (41), a stop screw (42) and a centrifugal spring (43), wherein the centrifugal spring (43) is sleeved on the centrifugal pin (41) and is pre-pressed into the tenth-step hole; the head of the centrifugal pin (30) is provided with an annular boss which is used for matching with a step surface between the tenth-step hole and the eleventh-step hole to realize limiting, the inner end is cylindrical, and the inner end extends into the sixth-step hole; and a retaining screw (42) positioned in the ninth-step hole is fixed at the outer end of the centrifugal pin (30) and used for radially restraining the centrifugal pin (30) along a fuse, and the outer end head of the centrifugal pin (30) is hemispherical and is in contact with and limited by the inner wall of the protective cap (1).

4. The mechanical trigger fuse of the warhead of the safety forest rocket fire extinguishing bomb according to claim 3, wherein: the rotor seat module (5) comprises a bottom screw (51), an explosion-proof mechanism (53) and two explosion-transmitting tubes (52), the mouth parts of the two explosion-transmitting tubes (52) are oppositely overlapped at the bottom of the center of the explosion-proof mechanism (53), and the explosion-proof mechanism (53) is fixed in an eighth step hole at the bottom of the first step hole through the bottom screw (51).

5. The mechanical trigger fuse of the warhead of the safety forest rocket fire extinguishing bomb according to claim 4, wherein: the explosion-proof mechanism (53) comprises a rotor base (531), a rotor (532), a rotor cover (533), a first firing pin (536), a rotation stopping pin (537), a torsion spring (538), a flame detonator (539), two positioning pins (534) and two screws (535); the fuse body (2) is eccentrically provided with two third axial blind holes with the open ends communicated with the eighth through hole along the axial direction, the top end of the positioning pin (534) is pressed into the third axial blind holes, the lower end of the positioning pin downwards penetrates through the rotor cover (533) and extends into a preset blind hole of the rotor seat (531), and the rotor seat (531) is prevented from rotating relative to the fuse body (2) so as to realize directional positioning; a bottom screw (51) in threaded connection with the fuse body (2) is sleeved below the rotor seat (531), and the explosion-proof mechanism (53) and the booster (52) are fixed in the fuse body (2); a fifth stepped hole is formed in the center of the top surface of the rotor seat (531), and is an eighteenth-step hole and a nineteenth-step hole from top to bottom, a rotor (532) is arranged in the fifth stepped hole, a rotating shaft of the rotor (532) extends upwards out of a rotor cover (533), and the rotor cover (533) is positioned on the top surface of the rotor (532) main body; the bottom of the rotor seat (531) is provided with a second through hole along the axial direction in an eccentric manner; the bottom of the rotor seat (531) is eccentrically provided with a sixth stepped hole with the diameter decreasing from bottom to top in sequence, a twentieth-step hole, a twenty-first-step hole and a twenty-twelfth-step hole in sequence, and the recoil pin safety module (6) is arranged in the sixth stepped hole; the second through hole is parallel to the sixth stepped hole; a fourth axial blind hole is formed in the bottom of the rotor seat (531) upwards along the central axis of the fuse body (2), and the booster (52) is arranged in the fourth axial blind hole; a third through hole communicated with the eighteenth-step hole and the twelfth-step hole is formed in the outer side surface of the rotor seat (531) along the radial direction, and the front part of the safety lever safety module (7) is arranged in the third through hole; the rotor (532) is composed of an eighth cylinder, a ninth cylinder, a tenth cylinder, an eleventh cylinder and a twelfth cylinder from top to bottom, the eighth cylinder penetrates through the rotor cover (533), the ninth cylinder, the tenth cylinder and the eleventh cylinder are arranged in an eighteenth-order hole, the twelfth cylinder is arranged in a nineteenth-order hole, an axial through groove is formed in the eighth cylinder, and the eleventh cylinder is limited by a step surface between the eighteenth-order hole and the nineteenth-order hole; the rotor (532) is eccentrically provided with a fourth through hole along the axial direction, the rotor cover (533) is eccentrically provided with a fifth through hole along the axial direction, and the second through hole, the fourth through hole and the fifth through hole are coaxial and are used for realizing the axial positioning of the rotor seat (531), the rotor (532) and the rotor cover (533) during assembly; the rotor (532) is provided with two sixth through holes with the same diameter for adjusting the radial mass center position of the rotor part; a seventh stepped hole is formed in the top surface of the rotor (532) from top to bottom and sequentially comprises a thirteenth-order hole, a twenty-fourth-order hole, a twenty-fifth-order hole, a twenty-sixth-order hole and a twenty-seventh-order hole, a first firing pin (536) is riveted in the twenty-fourth-order hole and limited by a stepped surface between the twenty-fourth-order hole and the twenty-fifth-order hole, four eccentric fire-transmitting holes are uniformly distributed in the first firing pin (536), the firing pin point is arranged upwards, and the output end of a flame detonator (539) is fixedly riveted in the twenty-seventh-order hole downwards; a pressure relief blind hole is formed in the rotor seat (531) right below the flame detonator (539); the rotor (532) is provided with an eccentric axial through groove which is used for matching with the bumper safety module (7) and the fire cap rod (36) to fix the rotor (532) at an assembly position to realize redundant safety; a bulge is arranged at the opening part of the eccentric axial through slot on the rotor (532) to realize the fault insurance; a fifth axial blind hole which is symmetrical about the central axis of the seventh stepped hole is formed in the top surface of the rotor (532), the rotation stopping pin (537) is in a stepped shaft shape, the large end of the rotation stopping pin is pressed into the fifth axial blind hole and is riveted and fixed by a point, the small end of the rotation stopping pin penetrates through the rotor cover (533), and the small end of the rotation stopping pin is positioned in an arc-shaped groove formed in the rotor cover (533); the rotor cover (533) is fixed on the rotor base (531) through two screws (535) and two positioning pins (534); the torsion spring (538) is in a pre-twisting state, one end of the torsion spring is sleeved in the axial through groove of the rotor (532), and the other end of the torsion spring is clamped in a concave groove formed by the protrusion of the rotor cover (533) through a spring head of the torsion spring and is tightly attached to the protrusion.

6. The mechanical trigger fuse of the warhead of the safety forest rocket fire extinguishing bomb according to claim 5, wherein: the recoil pin safety module (6) comprises a recoil pin (61), a recoil spring (62) and a gasket (63); the recoil pin (61) is positioned in the twenty-first-step hole and the twenty-second-step hole and is limited by a step surface between the twenty-first-step hole and the twenty-second-step hole, and the front end of the recoil pin (61) penetrates through a radial hole of the bumper module (7) to extend into the twenty-second-step hole, so that recoil safety of the bumper module (7) is realized; the recoil spring (62) is in a pre-pressing state during assembly, the upper part of the recoil spring is propped against the recoil pin (61), the lower part of the recoil spring is propped against the gasket (63), and the gasket (63) is fixed in the twentieth stepped hole through riveting.

7. The mechanical trigger fuse of the warhead of the safety forest rocket fire extinguishing bomb according to claim 6, wherein: the third step hole is a third-step through hole with the diameter decreasing from outside to inside, and is sequentially a twelfth step hole, a thirteenth step hole and a fourteenth step hole, the safety rod safety module (7) comprises a safety rod (71), a safety release spring (72), a helicoidal ring (73), a steel washer (74) and a rubber ring (75), is radially arranged in the third step hole, more than half of the safety rod extends into the rotor seat (531), and is used for implementing chamber contact safety and chamber outlet safety on the rotor (532); the safety rod (71) is a rotary body, the middle part of the safety rod is thick and approximate to an expanded part, the front end of the safety rod (71) extends into a radial groove of the rotor (532), the middle part of the safety rod passes through the third through hole, the tail part of the safety rod is arranged in the twelfth-order hole, the thirteenth-order hole and the fourteenth-order hole, the tail end of the tail part of the safety rod is close to the inner wall of the protective cap (1), and the inner wall of the protective cap (1) provides transportation safety for the safety rod (71); the steel gasket (74) and the sealing ring (75) are arranged in a stacked mode and pressed on a step surface between the twelfth-order hole and the thirteenth-order hole, and the tail portion of the safety rod (71) penetrates through central through holes of the steel gasket (74) and the sealing ring (75); the helicoidal ring (73) positioned in the twelfth-order hole is tightly attached to the outer side of the steel washer (74), the tail end of the bumper rod (71) penetrates through the helicoidal ring (73), and the helicoidal ring (73) is in threaded connection with the fuse body (2) and used for pressing the sealing ring (75) and the steel washer (74); the relief spring (72) is pre-pressed and then arranged in a tenth three-step hole of the fuse body (2), one end of the relief spring (72) is pressed against a step surface between the thirteenth step hole and the fourteenth step hole, and the other end of the relief spring is pressed against an inner annular end surface of an expansion part in the middle of the safety rod (71).

8. The mechanical trigger fuse of the warhead of the safety forest rocket fire extinguishing bomb according to claim 7, wherein: the fourth stepped hole is a three-step through hole with the diameter decreasing from bottom to top, and is a fifteenth-step hole, a sixteenth-step hole and a seventeenth-step hole in sequence; the recoil safety mechanism module (8) comprises a safety pin (81), a sleeve (82), a spring sleeve (84), a back cover pressing screw (85), a spring core (86) and two safety springs (83), the recoil safety mechanism module (8) is arranged in a fourth stepped hole, and all parts of the recoil safety mechanism module are coaxial; the upper end surface of the sleeve (82) is tightly attached to the step surface between the sixteenth-order hole and the seventeenth-order hole, and the lower end surface of the sleeve is tightly attached to the bottom of a blind hole of a bottom sealing press screw (85) in threaded connection with the fuse body (2); the bottom end face of the spring core (86) is tightly attached to the bottom of the blind hole of the bottom sealing pressing screw (85), and the radial positioning, closing and fixing are realized by the stepped step at the lower end of the sleeve (82); the safety pin (81) is composed of a thirteenth cylinder, a fourteenth cylinder, a fifteenth cylinder and a sixteenth cylinder from top to bottom, a fillet is arranged at the joint of the thirteenth cylinder and the fourteenth cylinder, a fillet is also arranged at the joint of the fourteenth cylinder and the fifteenth cylinder, a sixth axial blind hole is upwards arranged at the bottom of the sixteenth cylinder, the top surface of the thirteenth cylinder is tightly attached to the outer cylindrical surface of the safety rod (71) above the thirteenth cylinder, and the sixteenth cylinder is positioned in the sleeve (82); the spring sleeve (84) is positioned in the sixth axial blind hole, and a through hole is formed in the center of the spring sleeve (84); the two safety springs (83) are in a pre-pressing state and are respectively arranged right above and right below the spring sleeve (84), wherein the top ends of the safety springs (83) located right above are abutted to the bottom of the sixth axial blind hole, and the bottom ends of the safety springs (83) located right below are abutted to the inner ring surface of the spring core (86).

9. The safety type forest rocket fire extinguishing bomb warhead mechanical trigger fuse according to claim 8, wherein: the inertia ignition module (9) comprises an inertia trigger mechanism (91) and a hole-opening pressing screw (92), wherein the inertia trigger mechanism (91) comprises a second firing pin (911), a firing pin spring (912), a second needle piercing fire cap (913), a fire cap seat (914) and a firing sleeve (915); a first central fire transfer hole is formed in the fire cap seat (914), a second central fire transfer hole is formed in the firing sleeve (915), a third central fire transfer hole is formed in the tapping pressing screw (92), and the first central fire transfer hole, the second central fire transfer hole and the third central fire transfer hole are communicated in the same diameter to form a central fire transfer channel for outputting flame of the second acupuncture fire cap (913); a central stepped hole is formed in the fire cap seat (914), a second acupuncture fire cap (913) is arranged at the front end of the fire cap seat (914), and a first central fire transfer hole is formed in the rear of the fire cap seat (914); the firing cap seat (914) is arranged in the firing sleeve (915), a second firing pin (911) is fixed on the same side of the firing sleeve (915) as the second acupuncture firing cap (913), a pre-pressing firing pin spring (912) is arranged between the second firing pin (911) and the firing cap seat (914), and the pressing height of the firing pin spring (912) is smaller than the length of the tip part of the second firing pin (911); the hole-opening pressing screw (92), the firing sleeve (915), the fire cap seat (914), the second acupuncture fire cap (913), the firing pin spring (912) and the second firing pin (911) are coaxially arranged; the second firing pin (911) is positioned by the step of the mouth part of the firing sleeve (915) and is fixed by the mouth part closing.