CN114963899B

CN114963899B - Safety type forest rocket fire extinguishing bomb warhead mechanical trigger fuze

Info

Publication number: CN114963899B
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: 2023-04-21
Anticipated expiration: 2042-06-02
Also published as: CN114963899A

Abstract

The invention discloses a safe mechanical triggering fuze of a warhead of a forest rocket fire extinguishing bomb, which utilizes the head space of the fire extinguishing bomb to form a truncated cone shape, is used for detonating a central detonation tube of the forest rocket fire extinguishing bomb so as to throw out fire extinguishing agent, and comprises a protective cap, a fuze body, a fire triggering 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 inertial ignition module. The fuse is not relieved before the projectile active section by utilizing manual operation, squat, rotation and head-on airflow relief, utilizing the principles of relief time window, fault safety and the like, the safety design under the weak emission environment can be realized, and the related requirements of GJB373B-2019 'fuse safety design criterion' are met. The fuze has two firing modes of impact triggering and inertial triggering, has a small falling angle triggering function, and has high action reliability; meanwhile, the device has a fire insulation function, and can ensure the safety of the treatment of the explosive of the non-explosive; simple structure and low cost.

Description

Safety type forest rocket fire extinguishing bomb warhead mechanical trigger fuze

Technical Field

The invention belongs to the technical field of fire control and extinguishment, and particularly relates to a safe mechanical triggering fuze for a warhead of a forest rocket fire extinguishing bomb.

Background

Forest fires are natural disasters which are strong in burst property, high in destructive power and difficult to treat and rescue, particularly forest fires are frequent due to current climate change, so that great pressure is brought to forest fire prevention, and how to efficiently and safely rescue the forest fires is a worldwide problem. As a fire extinguishing device capable of being projected remotely, the forest rocket fire extinguishing bomb can greatly improve the fire extinguishing efficiency and reduce the casualties. However, the forest fire extinguishing bomb fuze used at present, such as the forest fire extinguishing bomb fuze described in the Chinese patent 201521001707.0, is not provided with a safety and releasing safety device in design, is equivalent to an ancient fuze before 1 century, does not meet the basic requirements of the modern fuze safety design standard GJB373B-2019 'fuze safety design rule', and once a fuze is accidentally fired due to external stimulus such as electromagnetic interference, mechanical impact, high-temperature baking and the like in the storage and transportation process, the central explosion tube of the fire extinguishing bomb extinguishing fighting part is detonated, and then adjacent fire extinguishing bombs (central explosion tube of the fighting part and rocket engine charge) are detonated, so that the accident explosion disaster hidden danger which is more serious than the forest fire result exists. In addition, the fuze adopts an electromechanical principle, has shorter storage life than a mechanical trigger fuze and higher cost than the mechanical trigger fuze, has no self-failure, fire insulation and explosive treatment characteristics, and has great unexpected explosion hidden danger when the fuze is out of fire and the non-explosive powder is left behind, especially in forest fire fields. Therefore, it is necessary to provide a safe forest rocket fire extinguishing bomb fuze, so that the fuze can not only ensure that the accident of accidental firing of the fuze does not occur in the storage and transportation processes of the fuze, but also ensure the explosive treatment safety of the non-explosive bomb formed after the fire is extinguished.

Disclosure of Invention

The invention aims to provide a safe mechanical trigger fuze for a warhead of a forest rocket fire extinguishing bomb, which can not only ensure that unexpected explosion accidents do not occur in the storage and transportation processes of the forest rocket fire extinguishing bomb, but also ensure the explosive treatment safety of the non-explosive bomb formed after misfire.

The technical solution for realizing the purpose of the invention is as follows: a safe mechanical triggering fuze for a warhead of a forest rocket fire extinguishing bomb comprises a protective cap, a fuze body, a collision 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, two sets of inertial firing modules and three sets of centrifugal safety modules; a first stepped hole is formed downwards from the top surface of the fuse body along the central axis of the 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 formed in sequence; three second stepped holes are uniformly formed in the outer side wall of the fuze 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 the 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 provided with a fourth stepped hole communicated with the third stepped hole along the axial direction in an eccentric manner; the outer wall of the fuze body is uniformly provided with 6 first through holes with upward inclination opening directions along the circumferential direction, the 6 first through holes are communicated with a fifth step hole of the fuze body, and the included angle between the central axis of the first through holes and the central axis of the first step hole is 45-80 degrees; the fuse body head 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 mutually communicated are coplanar with the axis of the fuse body; the collision firing module is arranged in a first stepped hole of the fuze body, the centrifugal safety module is arranged in a second stepped hole of the fuze body, the rotor seat module is arranged in an eighth stepped hole of the fuze body, the squatting pin safety module is arranged in the rotor seat module, the squatting safety mechanism module is arranged in a fourth stepped hole of the fuze body, and the safety lever safety module is arranged in a third stepped hole of the fuze body; the fuze body is also provided with two second axial blind holes with open ends communicated with the eighth-order holes, the second axial blind holes are parallel to the seventh-order holes, the second axial blind holes are positioned above the rotor seat module, the second axial blind holes are arranged in a direction 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 inertial ignition module; the protective cap is sleeved on the outer side of the fuze body.

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

by applying the fail-safe time window and the fail-safe principle and through the organic combination of various safety mechanisms and the fail-safe mechanisms, the safety design of the fuse under the weak environment is realized, and the related requirements of GJB373B-2019 'fuse safety design criterion' standard are comprehensively met.

The floor cleaning and frying firing functions are provided, and the action reliability is improved.

Has the function of fire insulation and is beneficial to the safety of explosive treatment of non-explosive.

Drawings

Fig. 1 is a cross-sectional view of an axial section of a structure of an embodiment of a mechanical trigger fuze of a warhead of a safe forest rocket fire extinguishing bomb according to the present invention.

Fig. 2 is a bottom view of the mechanical trigger fuze of the warhead of the safe forest rocket fire extinguishing bomb of the present invention.

Fig. 3 is a cross-sectional view of the G-G section of the mechanical trigger fuze of the warhead of the safe forest rocket fire extinguishing bomb of the present invention.

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

Fig. 5 isbase:Sub>A sectional view of sectionbase:Sub>A-base:Sub>A of the mechanical trigger fuze of the warhead of the safe forest rocket fire extinguishing bomb of the present invention.

Figure 6 is a D-D cross-sectional view of the mechanical trigger fuze of the warhead of the safe forest rocket fire extinguishing bomb of the present invention,

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

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

Fig. 9 is a schematic structural diagram of specific parts of a safety lever safety module of a mechanical triggering fuse of a warhead of the safe forest rocket fire extinguishing bomb.

Fig. 10 is a schematic structural diagram of specific parts of a squat safety mechanism module of a mechanical triggering fuze of a warhead of a safe forest rocket fire extinguishing bomb.

Fig. 11 is an isometric view of a rotor of a mechanical trigger fuse of a warhead of a safe 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 collision firing module, 4 is a centrifugal safety module, 5 is a rotor seat module, 6 is a recoil pin safety module, 7 is a safety lever safety module, 8 is a recoil safety mechanism module, and 9 is an inertial firing module; 31 is a moisture proof sheet, 32 is a striker, 33 is a striker spring, 34 is a retainer, 35 is a fire cap spring, 36 is a fire cap lever, 37 is a first acupuncture fire cap, 41 is a centrifugal pin, 42 is a retaining screw, 43 is a centrifugal spring, 51 is a bottom screw, 52 is a booster, 53 is a flameproof mechanism, 61 is a recoil pin, 62 is a recoil spring, 63 is a gasket, 71 is a safety lever, 72 is a disarming spring, 73 is a coil, 74 is a steel washer, 75 is a sealing ring, 81 is a safety pin, 82 is a sleeve, 83 is a safety spring, 84 is a spring sleeve, 85 is a back-up press screw, 86 is a spring core, 91 is an inertia trigger mechanism, 92 is an open-cell press screw; 52 is booster, 531 is rotor seat, 532 is rotor, 533 is rotor cover, 534 is locating pin, 535 is screw, 536 is first firing pin, 537 is stop pin, 538 is torsion spring, 539 is flame detonator, 911 is second firing pin, 912 is firing pin spring, 913 is second acupuncture cap, 914 is cap seat, 915 is firing sleeve.

Description of the embodiments

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without creative efforts, are within the scope of the present invention based on the embodiments of the present invention.

The description as it relates to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the "connection" may be mechanical or electrical. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 11, the mechanical triggering fuse of the warhead of the safe forest rocket fire extinguishing bomb comprises a protective cap 1, a fuse body 2, a collision firing 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 inertial firing modules 9 and three centrifugal safety modules 4; a first stepped hole is formed downwards along the central axis of the self-fuze body 2, and is sequentially a first stepped hole, a second stepped hole, a third stepped hole, a fourth stepped hole, a fifth stepped hole, a sixth stepped hole, a seventh stepped hole and an eighth stepped hole; 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 provided with a fourth stepped hole communicated with the third stepped hole along the axial direction in an eccentric manner; the outer wall of the fuze body 2 is uniformly provided with 6 first through holes with upward inclination opening directions along the circumferential direction, the 6 first through holes are communicated with a fifth step hole of the fuze body 2, and the included angle between the central axis of the first through holes and the central axis of the first step hole is 45-80 degrees; the head of the fuse body 2 is uniformly provided 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 mutually communicated are coplanar with the axis of the fuse body 2; the collision firing 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 squat pin safety module 6 is arranged in the rotor seat module 5, the squat 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 a third stepped hole of the fuse body 2; the fuze body 2 is also provided with two second axial blind holes with open ends communicated with the eighth-order holes, the second axial blind holes are parallel to the seventh-order holes, the second axial blind holes are positioned above the rotor seat module 5, the second axial blind holes are arranged in a direction 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 inertial ignition module 9; the side surface of the fuze body 2 is provided with a first wrench groove; the protective cap 1 is sleeved on the outer side of the fuze body 2, and a second wrench groove is formed in the side face of the protective cap, so that the protective cap is convenient to assemble with the fuze body 2.

The collision firing module 3 refers to a collision triggering mechanism or a pneumatic releasing safety mechanism of the rotor seat module 5; the impact triggering mechanism is different from the pneumatic releasing safety mechanism of the rotor seat module 5 only from different functions, and comprises a moisture-proof sheet 31, a striker rod 32, a striker rod spring 33, a retainer ring 34, a fire cap rod spring 35, a fire cap rod 36 and a first acupuncture fire cap 37, wherein the moisture-proof sheet 31 is positioned in a first-stage hole of the fuse body 2, the striker rod 32 and the striker rod spring 33 are both positioned in a second-stage hole, and the retainer ring 34 is positioned in a third-stage hole and limited by a step surface between the third-stage hole and the fourth-stage hole; the fire cap rod spring 35 is positioned in the fourth-order hole, the fire cap rod 36 is positioned in the fourth-order hole, the fifth-order hole, the sixth-order hole, the seventh-order hole and the eighth-order hole, and the head of the fire cap rod 36 is limited by a step surface between the fourth-order hole and the fifth-order hole; the striker 32 is composed of a first cylinder and a second cylinder which are gradually decreased from top to bottom in diameter, the diameter of the first cylinder is larger than that of the second cylinder, and a circle of grooves are formed in the outer wall of the circumference of the first cylinder. The striker rod spring 33 is sleeved on the second cylinder of the striker rod 32, one end of the striker rod spring 33 is propped against the lower end ring surface of the first cylinder, the other end of the striker rod spring is propped against the upper end surface of the retainer ring 34, one end of the firecap rod spring 35 is propped against the bottom surface of the retainer ring 34, the other end of the firecap rod spring is propped against the top surface of the firecap rod 36, and the striker rod spring 33 and the firecap 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 round corner is arranged at the intersection of the fourth cylinder and the fifth cylinder, a round corner is also arranged at the intersection of the fifth cylinder and the sixth cylinder, a ring groove is arranged on the sixth cylinder, and the centrifugal safety module 4 stretches into the ring groove to realize centrifugal safety; a frustum is arranged at the intersection of the sixth cylinder and the seventh cylinder, and the output end of the bottom of the seventh cylinder is provided with a first needling cap 37 downwards and extends into an axial through groove of the rotor seat module 5 to serve as a first explosion element for triggering ignition; after the fuze is launched, the fuze can rotate at a low speed along with the fire-extinguishing rocket projectile, the centrifugal safety module 4 releases the safety, air can enter from 6 first axial blind holes and 6 first through holes of the fuze body 2 during air flight, a high-pressure area and a low-pressure area are formed on the upper side and the lower side of a 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 seat module 5 is released, and after the fuze impacts a target, the striker rod 32 downwards compresses the striker rod spring 33 under the action of the impact force of the target ground, and then impacts the fire cap rod 36 downwards to finish impact triggering.

The second stepped hole is a third-order through hole with decreasing diameter from outside to inside, and is a ninth-order hole, a tenth-order hole and an eleventh-order hole in sequence; the centrifugal safety module 4 is a centrifugal safety mechanism of a pointer pair pneumatic releasing safety mechanism and comprises a centrifugal pin 41, a blocking screw 42 and a centrifugal spring 43, wherein the centrifugal spring 43 is sleeved on the centrifugal pin 41 and preloaded into a tenth-stage hole; the head of the centrifugal pin 41 is provided with an annular boss which is used for being matched with a step surface between the tenth-order hole and the eleventh-order hole to realize limit, the inner end head is cylindrical, and the inner end head stretches into the sixth-order hole; the blocking screw 42 positioned in the ninth-order hole is fixed at the outer end of the centrifugal pin 41 and used for restraining the centrifugal pin 41 along the fuze radial direction, and the outer end of the centrifugal pin 41 is hemispherical, contacts with the inner wall of the protective cap 1 and is limited by the inner wall of the protective cap; after the fuze is fired, the centrifugal pin 41 moves outwardly with respect to the fuze body 2 under centrifugal force to compress the centrifugal spring 43, and the centrifugal pin 41 is released from the cap lever 36 after being separated from the cap lever 36.

The rotor seat module 5 comprises a bottom screw 51, an explosion-proof mechanism 53 and two explosion-conducting pipes 52, the mouths of the two explosion-conducting pipes 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-order hole at the bottom of the first stepped 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 stop pin 537, a torsion spring 538, a flame detonator 539, two positioning pins 534 and two screws 535; the fuse body 2 is provided with a third axial blind hole with two open ends communicated with an eighth-order hole along the axial eccentricity, the top end of the positioning pin 534 is pressed into the third axial blind hole, the lower end of the positioning pin penetrates through the rotor cover 533 downwards and stretches 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 that the direction positioning required by an asymmetric structure is realized; a bottom screw 51 in threaded connection with the fuze body 2 is sleeved below the rotor seat 531, and the explosion-proof mechanism 53 and the explosion-propagating tube 52 are fixed in the fuze body 2; a fifth stepped hole, an eighteenth stepped hole and a nineteenth stepped hole from top to bottom, is formed in the center of the top surface of the rotor seat 531, the rotor 532 is disposed in the fifth stepped hole, and the rotation shaft of the rotor 532 extends upwards out of the rotor cover 533, so that the rotor cover 533 is located 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 eccentric direction; the bottom of the rotor seat 531 is provided with a sixth stepped hole with diameters decreasing from bottom to top in sequence along the axial direction, wherein the sixth stepped hole is a twentieth stepped hole, a twenty-first stepped hole and a twenty-second stepped hole in sequence, and the squatting pin safety module 6 is arranged in the sixth stepped hole; the second through hole is parallel to the sixth stepped hole; the bottom of the rotor seat 531 is provided with a fourth axial blind hole upwards along the central axis of the fuze body 2, and the booster tube 52 is arranged in the fourth axial blind hole; a third through hole which is communicated between the eighteenth order hole and the twenty second order hole is formed on the outer side surface of the rotor seat 531 along the radial direction, and the upper part of the bumper 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 passes through the rotor cover 533, the ninth cylinder, the tenth cylinder and the eleventh cylinder are arranged in the eighteenth order hole, the twelfth cylinder is arranged in the nineteenth order hole, the eighth cylinder is provided with an axial through groove, 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 eccentric direction, the rotor cover 533 is provided with a fifth through hole along the axial eccentric 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 and used for adjusting the radial mass center position of the rotor component; the top surface of the rotor 532 is provided with a seventh stepped hole from top to bottom, which is sequentially provided with a twenty-third stepped hole, a twenty-fourth stepped hole, a twenty-fifth stepped hole, a twenty-sixth stepped hole and a twenty-seventh stepped hole, a first firing pin 536 is riveted in the twenty-fourth stepped hole and limited by a stepped surface between the twenty-fourth stepped hole and the twenty-fifth stepped hole, four eccentric fire transmission holes are uniformly distributed on the first firing pin 536, the firing pin tip is upwards arranged, and the output end of the flame detonator 539 is downwards fixedly riveted in the twenty-seventh stepped hole; the rotor seat 531 is provided with a pressure relief blind hole right below the flame detonator 539, and after the flame detonator 539 explodes accidentally, the pressure inside the detonator is ensured to decline, and the detonator is not disassembled and is not subjected to dangerous fragmentation outwards; the rotor 532 is provided with an eccentric axial through slot for being matched with the hearth releasing and pneumatic releasing mechanism, namely a bumper 71 and a fire cap rod 36, so that the rotor 532 is fixed at the assembling position to realize redundant safety; the eccentric axial through notch part on the rotor 532 is provided with a bulge for realizing the fault protection; the top surface of the rotor 532 is provided with a fifth axial blind hole symmetrical about the central axis of the seventh stepped hole, the rotation stop pin 537 is in a stepped shaft shape, the large end of the rotation stop pin 537 is pressed into the fifth axial blind hole and is riveted by a point, the small end of the rotation stop pin is penetrated through the rotor cover 533, and the small end of the rotation stop pin is positioned in an arc-shaped groove formed in the rotor cover 533; the rotor cover 533 is fixed to the rotor base 531 by two screws 535 and two positioning pins 534; torsion spring 538 is in a pre-torsion state, one end of the torsion spring is sleeved in the shaft end through groove of rotor 532, and the other end of the torsion spring is clamped in a concave groove formed by the bulge of rotor cover 533 through the spring head of the torsion spring and is clung to the bulge; after the recoil pin safety module 6, the recoil safety mechanism module 8, the bumper safety module 7, the centrifugal safety module 4, and the collision firing module 3 are all released in time sequence, the rotor 532 rotates clockwise (looking down from the head of the fuse body 2) under the pre-torsion force of the torsion spring 538, and the rotor 532 makes the first striker 536 face the hood bar 36 in preparation for firing the first acupuncture hood 37 at the bottom of the hood bar 36.

The third stepped hole is a third-order through hole with decreasing diameter from outside to inside, and is a twelfth-order hole, a thirteenth-order hole and a fourteenth-order hole in sequence, the bumper safety module 7 is a hearth-contacting and releasing safety mechanism of the explosion-proof mechanism 52, and comprises a safety lever 71, a releasing spring 72, a spiral ring 73, a steel washer 74 and a sealing ring 75, and more than half of the third stepped hole is arranged in the third stepped hole along the radial direction and extends into the rotor seat 531 for implementing hearth-contacting safety and hearth-discharging safety release for the rotor 532; the bumper 71 is a revolution body, the middle part of the bumper 71 is thicker and approximately expanded, the front end of the bumper 71 extends into a radial groove of the rotor 532, the middle part of the bumper passes through the third through hole, the tail part of the bumper is arranged in the twelfth order hole, the thirteenth order hole and the fourteenth order hole, the tail end of the bumper is close to the inner wall of the protective cap 1, and the inner wall of the protective cap 1 provides transportation insurance for the bumper 71; the steel washer 74 and the sealing ring 75 are overlapped and pressed on the step surface between the twelfth step hole and the thirteenth step hole, and the tail part of the bumper 71 passes through the central through holes of the steel washer 74 and the sealing ring 75; the coil 73 in the twelfth order hole is tightly attached to the outer side of the steel washer 74, the tail end of the bumper 71 passes through the coil 73, and the coil 73 is in threaded connection with the fuse body 2 and is used for pressing the sealing ring 75 and the steel washer 74; the decompression spring 72 is arranged in the thirteenth step hole of the fuse body 2 after being preloaded, one end of the decompression spring 72 is propped against a step surface between the thirteenth step hole and the fourteenth step hole, and the other end is propped against an inner annular end surface of the middle expansion part of the bumper 71.

The squat pin safety module 6, i.e. the squat pin-spring safety mechanism for the contact chamber release safety mechanism, comprises a squat pin 61, a squat spring 62 and a spacer 63; the recoil pin 61 is positioned in the twenty-first order hole and the twenty-second order hole, and is limited by a step surface between the twenty-first order hole and the twenty-second order 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 order hole, so as to realize recoil insurance for the bumper safety module 7; the recoil spring 62 is in a pre-pressed 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 spot riveting; after the fuze is fired, the recoil pin 61 moves rearward relative to the fuze body 2 under the influence of the recoil force to compress the recoil spring 62, and the upper end surface of the recoil pin 61 is released from the safety lever 71 after it leaves the radial hole of the safety lever 71.

The fourth stepped hole is a third-order through hole with decreasing diameter from bottom to top, and is a fifteenth-order hole, a sixteenth-order hole and a seventeenth-order hole in sequence; the squat safety mechanism module 8 is a dual-freedom squat safety mechanism with a fault safety function aiming at a contact chamber releasing safety mechanism, and comprises a safety pin 81, a sleeve 82, a spring sleeve 84, a back cover press screw 85, a spring core 86 and two safety springs 83, wherein the squat safety mechanism is arranged in a fourth stepped hole, and all parts of the squat safety mechanism are coaxial; the upper end surface of the sleeve 82 is clung to the step surface between the sixteenth step hole and the seventeenth step hole, and the lower end surface is clung to the blind hole bottom of the bottom sealing press screw 85 which is in threaded connection with the fuze body 2; the bottom end surface of the spring core 86 is tightly attached to the bottom of the blind hole of the bottom sealing press screw 85, and radial positioning and closing-up fixation are realized by a 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 round corner is arranged at the intersection of the thirteenth cylinder and the fourteenth cylinder, a round corner is also arranged at the intersection of the fourteenth cylinder and the fifteenth cylinder, a sixth axial blind hole is arranged upwards at the bottom of the sixteenth cylinder, the top surface of the thirteenth cylinder is closely 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 arranged in the center of the spring sleeve 84; the two safety springs 83 are in a pre-pressing state and respectively located right above and right below the spring sleeve 84, wherein the top end of the safety spring 83 located right above is propped against the bottom of the sixth axial blind hole, and the bottom end of the safety spring 83 located right below is propped against the inner annular surface of the spring core 86; after the fuse is fired, the safety pin 81 moves backward 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-stage hole, namely, the safety of the safety rod 81 is relieved.

The inertial ignition module 9 comprises an inertial triggering mechanism 91 and an open pore press screw 92, wherein the inertial triggering mechanism 91 comprises a second firing pin 911, a firing pin spring 912, a second acupuncture fire cap 913, a fire cap seat 914 and a firing sleeve 915; the fire cap seat 914 is provided with a first central fire hole, the firing sleeve 915 is provided with a second central fire hole, the perforated press screw 92 is provided with a third central fire hole, and the first central fire hole, the second central fire hole and the third central fire hole are communicated with one another in the same diameter to form a central fire transmission channel for outputting flames of the second acupuncture fire cap 913; the fire cap 914 is provided with a central stepped hole, the front end of the fire cap 914 is provided with a second acupuncture fire cap 913, and the rear of the fire cap 914 is provided with a first central fire transmission hole; 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 tip length of the second firing pin 911; the perforated press screw 92, the firing sleeve 915, the fire cap 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 of the firing sleeve 915 and is fixed by the mouth closing; after the fuze strikes the target, the fire cap seat 914 and the second acupuncture fire cap 913 therein move forward under the action of forward thrust overload to compress the firing pin spring 912, so that the second acupuncture fire cap 913 in the second firing cap seat 914 is ignited, and then the fire is transmitted backward through the central fire transmission through holes of the fire cap seat 914, the firing sleeve 912 and the perforated press screw 92, and transmitted into the cavity of the rotor seat 531, and finally the flame detonator 539 in the rotor 532 is detonated.

The main safety principle of the mechanical triggering fuze of the warhead of the safe forest rocket fire extinguishing bomb is as follows:

the mechanical triggering fuze of the warhead of the safe forest rocket fire extinguishing bomb is a pure mechanical principle fuze, so that the safety and the reliability of the safe forest rocket fire extinguishing bomb are not influenced by electromagnetic environment and electromagnetic interference.

During service treatment, the fuze is in an explosion-proof state, namely a factory assembly state, and is subjected to trusted impact and vibration, including accidental falling, transportation vibration and the like, so that the fuze cannot be accidentally relieved of insurance and accidentally exploded. The squat pin safety module 6 and squat safety mechanism module 7 can ensure that the fuze will not fail safe when it is accidentally dropped onto the ground, i.e., the safety pin 81 and squat pin 61 will not accidentally fail safe the safety bar 71, and the safety bar 71 will not fail safe the rotor 532. The three sets of redundant centrifugal safety modules 4 clamp the fire cap bar 36, and even if the fuze accidentally falls down the centrifugal safety modules 4, the fire cap bar 36 will not be relieved of the safety of the fire cap bar 36, and the fire cap bar 36 will not be relieved of the safety of the rotor 532, i.e. the fuze will not be relieved of the safety accidentally. When the fuze head falls down accidentally on the ground, the firing pin spring 912 in the inertia trigger mechanism 91 can ensure that the second acupuncture fire cap 913 in the fire cap seat 914 does not strike the second firing pin 911, thereby firing the second acupuncture fire cap 913. Failure of any single safety mechanism will not un-safety the rotor 532, i.e. the rotor 532 will not be accidentally turned right, ensuring the safety of the fuze in case of a trusted failure of the safety mechanism. If the rotor 532 is not relieved, the first acupuncture cap 37 positioned at the bottom of the cap lever 36 is offset from the axis of the first striking pin 536, and even if the first acupuncture cap 37 in the cap lever 36 is accidentally ignited, the first acupuncture cap 37 outputs only flame pulse, and the booster 52 under the partition plate to which the first acupuncture cap 37 is directly faced is not triggered. In the case where the rotor 532 is not relieved, the axis of the booster 52 is offset from the axis of the flame detonator 539, and even if the flame detonator 539 riveted in the second seventeenth-stage hole accidentally fires and explodes, or any one or any several of the first and second acupuncture caps 37 and 913 in the fuse accidentally fires and detonates the flame detonator 539 in the second seventeenth-stage hole, the flame detonator 539 does not detonate the booster 52, and the fuse is safe in flame-proof and in a fire-insulating state. The rotor seat 531 below the flame detonator 539 is internally provided with a pressure relief blind hole, so that after the flame detonator 539 is accidentally ignited and exploded, the pressure inside the detonator can be ensured to decline, and the explosion-proof flame detonator can not be disassembled or externally broken.

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 41 of the fuse pneumatic releasing mechanism and the safety rod 71 of the contact chamber releasing mechanism are blocked, so that service treatment safety 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 plugged, and the requirement of fuse storage tightness is met. Even if the protective cap 1 is accidentally loosened, the three redundant sets of centrifugal safety modules 4 will catch the fire cap bar 36 to ensure safe safety. The three sets of redundant centrifugal safety modules 4 are reversible in movement, so that the safety of the fuze under the trusted transportation and drop impact environments can be ensured. The moisture-proof sheet 31 above the striker bar 32 not only performs a sealing and moisture-proof function, but also blocks the entry of the oncoming air flow and axially positions the striker bar 32. The centrifugal safety module 4, which is composed of the centrifugal pin 41, the centrifugal spring 43 and the catch screw 42, limits the axial movement of the fire cap lever 36. Under normal conditions, the arming action of the squat pin safety module 6, i.e. the squat pin-spring safety mechanism, and the arming action of the bumper bar 71 are independent of each other and do not affect each other. Before the protective cap 1 is removed, the safety of the safety pin 81 and the recoil pin 61 to the safety rod 71 is reversible, namely, the safety pin 81 and the recoil pin 61 can release the safety of the safety rod 71 during the accidental falling and transportation vibration impact of the fuze head, but after the falling and transportation vibration impact disappears or is basically disappeared, the safety pin 81 and the recoil pin 61 can reset under the action of the safety spring 83 and the recoil spring 62 respectively to restore the safety of the safety rod 71.

In the normal launching process, the fuze is firstly arranged on the head of the fire-extinguishing rocket projectile through the connecting threads, and then the protective cap 1 is removed. That is, the fuse of the removing protective cap 1 is screwed on the fire-extinguishing rocket projectile, at this time, if the accidental head falls upward, the recoil pin-spring safety mechanism and the recoil safety mechanism may simultaneously release the safety of the safety rod 71, or the recoil safety mechanism is not released 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 released, the safety rod 71 moves outwards under the action of the release spring 72, the safety rod 71 extends out of the outer contour of the fuse body 2, the safety rod 71 also releases the safety of the rotor 532, but the rotor 532 also has the safety constraint provided by the fire cap rod 36, and at the moment, the safety rod 71 extending out of the outer contour of the fuse body 2 makes the maximum outer diameter of the fuse exceed the inner diameter, namely the caliber, of a rocket launching tube, and the fire-extinguishing rocket projectile equipped with the fuse cannot normally complete the loading action of the loading, so that the firing process of the fire-extinguishing rocket is forced to be stopped. If only the recoil pin-spring safety mechanism releases the safety and the recoil safety mechanism is not released, 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 middle expansion part of the safety rod 71, the safety pin 81 and the safety rod 71 are interlocked, the safety pin 81 can not release the safety of the safety rod 71, the rotor 532 is still locked in the explosion-proof state by the safety rod 71, and after that, the fuse enters the fail-safe state, namely the fail-safe state, so that the safety of the fuse in the service processing stage and the explosive processing stage is ensured, and meanwhile, the safety rod 71 also extends out of the outline of the fuse body 2, so that the maximum outer diameter of the fuse exceeds the inner diameter, namely the caliber, of a rocket launching tube, and the fire-extinguishing rocket projectile assembled with the fuse cannot normally complete the loading action of the fire-extinguishing rocket, and the fire-extinguishing rocket projectile launching process is also forced to be stopped.

If the safety function of the recoil pin-spring safety mechanism fails unexpectedly during service treatment, such as the recoil spring 62 breaks or leaks, the recoil pin 61 moves downward away from the safety lever 71 under the impact overload action of transportation vibration and the like, the recoil pin 61 loses the restraining action on the safety lever 71, and once the protective cap 1 is unscrewed, the safety lever 71 moves outward under the action of the release spring 72, the thirteenth cylinder is blocked by the annular groove of the expanded part of the safety lever 71, the safety lever 71 is interlocked with the safety pin 81, the rotor 532 is not released any more by the safety lever 71, the outer end of the safety lever 71 extends out of the outer contour of the fuze, the inner diameter of the transmitting tube is exceeded, and the fire-extinguishing rocket bomb can not be filled into the transmitting tube any more, so that the scheduled firing is forced to be stopped, and the fuze is in a fail-safe state.

If the safety function of the recoil safety mechanism fails unexpectedly during service handling, such as the safety spring 42 breaks off or is neglected or is less loaded, the safety pin 81 will move downward away from the safety lever 71 under the impact overload effect of transportation vibration and the like, the safety pin 81 will lose the potential restraining effect on the safety lever 71, and once the protective cap 1 is unscrewed, the safety lever 71 will move outward under the effect of the decompression spring 72, the outer end of the safety lever 71 extends out of the fuse outline beyond the inner diameter of the launch tube, the fire-extinguishing rocket projectile can no longer be loaded into the launch tube, the predetermined launch is forced to be stopped, the fuse inner rotor 532 is still restrained by the fire cap rod 36, and the fuse is also in a fail-safe state.

If the cap rod 36 and the bumper 71 or parts thereof are missing during assembly, anomalies are found in other assembly steps or work steps later on, or can be found in subsequent visual inspection and part count management, and are avoided.

Similarly, if the rotor 532 is accidentally misassembled into a non-secured condition during assembly, anomalies are found in other assembly steps or processes that follow, and visual inspection that follows can be found to avoid this.

The rotor 532 is the primary explosion proof member within which the sensitive explosive element flame detonator 539 is located for initiating the booster tube 52. The cap bar 36 and the bumper bar 71 are direct safeties of the rotor 532 and are independent of each other. The indirect safeties of the rotor 532 include the direct safeties of the fire cap lever 36, namely the centrifugal safeties 4 and the protective cap 1, and the direct safeties of the safety lever 71, namely the squat safeties, the squat pin-spring safeties, the rocket tube bore wall and the protective cap 1. The arming environment of the fire cap bar 36 includes manual unscrewing of the protective cap 1, rotation of the fire extinguishing rocket projectile by the offset tail at the end of the out-of-bore rocket engine operation, and head-on air pressure generated by the flying airflow of the fire extinguishing rocket projectile. The arming environment of the bumper 71 includes manual unscrewing of the protective cap 1, recoil of the overload, and ejection of the fire extinguishing rocket from the chamber. The redundancy insurance characteristics required by the GJB373B-2019 fuze safety design criteria standard are satisfied thereby.

If the rotor 532 is to be released, the cap lever 36 needs to have both a rotating environment and a forward-thrust environment, and it is impossible to provide both environments with a fuse by manual operation, even if both environments are weak, so that the fuse has a design characteristic that the fuse is not released manually.

The main working process of the mechanical triggering fuze of the warhead of the safe forest rocket fire extinguishing bomb is as follows:

before the fire-extinguishing rocket projectile is launched, the protective cap 1 which is sleeved on the fuze body 2 in a screw connection mode is screwed off by a special spanner.

Upon firing of the fire extinguishing rocket, the recoil pin 61 in the recoil pin-spring mechanism in the rotor seat 531 compresses the recoil spring 62 downward by the recoil force until the forwardmost end of the recoil pin 61 is completely disengaged from the radial hole of the bumper 71 and the recoil pin 61 unbinds the bumper 71. Likewise, the safety pin 81 and the sleeve 82 in the squat safety gear module 8 compress the 2 series-connected safety springs 83, i.e., the dual-degree-of-freedom squat safety gear, under the action of the squat force, and move downward until the thirteenth cylindrical upper end surface enters the seventeenth-stage hole, i.e., the height of the upper end surface of the safety pin 81 is lower than the height of the thirteenth-stage hole wall, and the safety pin 81 unbends the safety lever 71.

The extinguishing rocket is flown out of the barrel, and the bumper 71 loses the restraining effect of the inner bore of the launch tube. However, since the fire extinguishing bomb is still flying in acceleration by the propulsion of the rocket engine, the bumper 71 is still in its assembled position under the influence of the frictional force generated by the recoil constraint reaction force. At a certain point in the process of combustion approaching the end of the rocket engine and thrust attenuation, the recoil force and the friction force of the safety lever 71 are reduced, the thrust action of the unwinding spring 72 is not enough resisted, and the safety lever is outwards moved under the pushing of the unwinding spring 72, and extends out of the maximum outline part of the fuse body 2, so that the rotor 532 is released. In this process, safety pin 81 and squat pin 61 still compress safety spring 83 and squat spring 62, respectively, under squat force, and safety spring 83 and squat spring 62 still do not return, and safety pin 81 and squat pin 61 do not block movement of safety lever 71.

Under the action of the inclined tail wing, when the rotation speed of the fire-extinguishing rocket projectile approaches to the maximum value, the centrifugal pin 41 in the centrifugal safety module 4 compresses the centrifugal spring 43 to move outwards under the action of the centrifugal force until the forefront end of the centrifugal pin 41 is completely separated from the annular groove on the fire cap rod 36, and the centrifugal pin 41 releases the safety of the fire cap rod 36.

During the flight of the fire extinguishing rocket, air enters the inside of the fuze through the 6 first axial blind holes and the 6 first through holes of the fuze 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 pressure difference is generated. Theoretically, the acceleration process stops at the end of the rocket engine combustion, the velocity of the extinguishing rocket projectile is maximum, and the pressure difference formed by aerodynamic forces on the upper and lower surfaces of the third cylinder of the fire cap rod 36 is also maximum. Before the combustion of the rocket engine is finished, the fire-extinguishing rocket projectile accelerates, the recoil force 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 the aerodynamic pressure difference, and the fire cap rod 36 cannot release the insurance of the rotor 532. This feature essentially ensures that the fuze is not armed in the active section of the extinguishing rocket projectile. Only after the combustion of the rocket engine is finished, the fire-extinguishing rocket projectile stops accelerating, the fire cap rod 36 can be lifted upwards under the action of the aerodynamic pressure difference to overcome the pre-pressing resistance of the fire cap rod spring 35, so that the rotor 532 is relieved, 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 then rotates the rotor 532 through an angle under the effect of its pre-torque, causing the first striker 536 to coincide or substantially coincide with the axis of the primer 36, causing the explosion sequence to align, i.e., the flame detonator 539 within the rotor 532 to align with the booster 52, the fuse being released and in a armed state. The fire extinguishing rocket is large in mass, low in speed, small in resistance and high in speed storage capacity, and friction resistance also can prevent the fire cap rod 36 from resetting after the arming, so that the fire cap rod 36 stays at the arming position all the time.

After the fire extinguishing rocket projectile collides with the ground of the target area, the striking rod 32 in the striking fire module 3 compresses the striking rod spring 33 downwards under the action of the striking force, the striking rod 32 then strikes the fire cap rod 36 to cause the fire cap rod 36 to strike downwards towards the first firing pin 536, the first needle firing cap 37 at the bottom of the fire cap rod 36 is ignited by the penetration of the first firing pin 536, the output flame of the first needle firing cap 37 is transmitted to the input end of the flame detonator 539 on the rotor 532 through the 4 offset fire transmission holes on the first firing pin 536, the flame detonator 539 fires and explodes and detonates the booster (blackish-14) in the booster tube 52 thereafter, and then the central booster tube in the fire extinguishing rocket projectile is detonated, so that the fire extinguishing agent is thrown out and the fuze work is finished.

If the fire-extinguishing rocket projectile falls to the ground, the first firing pin 536 fails to reliably fire the first piercing cap 37 due to the accident, the fire cap seat 914 in the two sets of inertial triggering mechanisms 91 in the fuse body and the second piercing cap 913 in the fuse body move forward under the action of forward-thrust overload to compress the firing pin spring 912, so that the second firing pin 911 pierces the second piercing cap 913, and then the fire detonator 539 in the rotor 532 is detonated through the central fire transmission through hole of the fire cap seat 914, the firing sleeve 915 and the open-pore pressure screw 92, the flame detonator 539 in the fire explodes and detonates the booster in the booster 52 and finally detonates the central booster in the fire-extinguishing rocket projectile, and the fuse realizes the preset standby inertial triggering process. When the fire-extinguishing rocket projectile lands on the ground at a small falling angle, the two sets of redundant inertial triggering mechanisms 91 can still move according to a preset working process, so that the second firing pins 911 reliably pierce the second needling fire caps 913 in the firing cap seats 914, and the reliable ground wiping and frying actions of the fuze are ensured. Simply, in theory, the minimum firing angle at which the small firing angle reliably fires is the rubbing angle of the cap 914 in its chamber, which is approximately arctan (0.15) =8.5 °.

If the pneumatic releasing mechanism releases the safety before the pneumatic releasing mechanism releases the safety according to a preset time sequence, the torsion spring 538 rotates the rotor 532 by a certain angle (about 5-10 degrees) under the action of the pretwist moment, so that the eccentric axial through notch part on the rotor 532 is convexly clamped into the annular groove at the front end of the safety rod 71, the safety rod 71 is interlocked with the rotor 532, and the fuse enters a fail-safe state. Since the rotor component center of mass is designed at the center of its rotation axis and the dimensional accuracy of the parts in the rotor component is high, the dispersion of the center of mass position is not great, and no additional moment of inertia other than the pre-torsion moment of torsion spring 538 causes rotor 532 to rotate, the interlocking of bumper 71 with rotor 532 is reliable.

As long as there is one set of non-arming mechanism in each arming mechanism, the rotor 532 will not turn right and the fuse will not fire normally. However, the normal ignition function preset by the inertia trigger mechanism 91 is not affected, and an insulating effect is formed, that is, the second acupuncture fire cap 913 still detonates the flame detonator 539 in the rotor 532 which is not turned right, but the flame detonator 539 does not detonate the booster tube 52, and the detonator enters an insulating state after being extinguished, so that the safety of explosive treatment can be ensured.

The effective carrier of the fire-extinguishing rocket projectile is fire extinguishing agent, the explosive charge in the central explosion tube is used for explosion to throw the fire extinguishing agent, the explosive charge is smaller, and the fire-extinguishing rocket projectile has an acceleration process after flying out of the barrel, and the fuze can release centrifugal insurance and pneumatic insurance, namely, the fire cap rod insurance, at the point close to the maximum speed, namely, the combustion end point of the rocket engine, so the structure and principle essentially realize the delay and release characteristics of the fuze.

The fuse booster is made of black-14, so that the requirements of GJB373B-2019 on booster safety design criteria are met, and the situation that the fuse booster is not excessively fired due to accidental firing under the assembly condition, during service processing and in the emission process can be ensured.

The fuse adopts the principle of releasing the safety time window and the fault safety, and realizes the safety design of the fuse in the weak emission environment through the organic combination of various safety mechanisms and the releasing safety mechanisms. Meanwhile, the fuze is provided with a standby inertia trigger function besides the collision trigger function, so that the action reliability is improved. In addition, the device has the fire insulation function and can ensure the safety of explosive treatment of the non-explosive.

Claims

1. A safe forest rocket fire extinguishing bomb warhead mechanical triggering fuze is characterized in that: the safety protection device comprises a protection cap (1), a fuse body (2), a collision firing 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 firing modules (9) and three sets of centrifugal safety modules (4); a first stepped hole is formed downwards along the central axis of the self-fuze body (2), and the self-fuze body sequentially comprises a first stepped hole, a second stepped hole, a third stepped hole, a fourth stepped hole, a fifth stepped hole, a sixth stepped hole, a seventh stepped hole and an eighth stepped hole; three second stepped holes are uniformly formed in the outer side wall of the fuze 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 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 provided with a fourth stepped hole communicated with the third stepped hole along the axial direction in an eccentric way; the outer wall of the fuze body (2) is uniformly provided with 6 first through holes with upward inclination opening directions along the circumferential direction, the 6 first through holes are communicated with a fifth step hole of the fuze body (2), and the included angle between the central axis of the first through holes and the central axis of the first step hole is 45-80 degrees; the head of the fuse body (2) is uniformly provided 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 mutually communicated are coplanar with the axis of the fuse body (2); the collision firing module (3) is arranged in a first stepped hole of the fuze body (2), the centrifugal safety module (4) is arranged in a second stepped hole of the fuze body (2), the rotor seat module (5) is arranged in an eighth stepped hole of the fuze 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 fuze body (2), and the safety lever safety module (7) is arranged in a third stepped hole of the fuze body (2); the fuze body (2) is also provided with two second axial blind holes with open ends communicated with eighth-order holes, the second axial blind holes are parallel to the seventh-order holes, the second axial blind holes are positioned above the rotor seat module (5), the second axial blind holes are arranged in a direction 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 inertial ignition module (9); the protective cap (1) is sleeved on the outer side of the fuze body (2).

2. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze according to claim 1, characterized in that: the collision fire module (3) comprises a dampproof sheet (31), a collision rod (32), a collision rod spring (33), a retainer ring (34), a fire cap rod spring (35), a fire cap rod (36) and a first acupuncture fire cap (37), wherein the dampproof sheet (31) is positioned in a first-stage hole of the fuse body (2), the collision rod (32) and the collision rod spring (33) are both positioned in a second-stage hole, and the retainer ring (34) is positioned in a third-stage hole and limited by a step surface between the third-stage hole and a fourth-stage hole; the fire cap rod spring (35) is positioned in the fourth-order hole, the fire cap rod (36) is positioned in the fourth-order hole, the fifth-order hole, the sixth-order hole, the seventh-order hole and the eighth-order hole, and the head of the fire cap rod (36) is limited by a step surface between the fourth-order hole and the fifth-order hole; the striker rod (32) is composed of a first cylinder and a second cylinder with decreasing diameters from top to bottom, the diameter of the first cylinder is larger than that of the second cylinder, and a circle of grooves are formed in the outer wall of the circumference of the first cylinder; the second cylinder of the ram (32) is sleeved with the ram spring (33), one end of the ram spring is propped against the lower end surface of the first cylinder, the other end of the ram spring is propped against the upper end surface of the retainer ring (34), one end of the fire cap rod spring (35) is propped against the bottom surface of the retainer ring (34), the other end of the ram spring is propped against the top surface of the fire cap rod (36), and the ram 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 round corner is arranged at the joint of the fourth cylinder and the fifth cylinder, a round corner 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) stretches into the annular groove to realize centrifugal safety; a frustum is arranged between the sixth cylinder and the seventh cylinder, and the output end of the bottom of the seventh cylinder is downwards provided with a first needling fire cap (37) and extends into an axial through groove of the rotor seat module (5) to be used as a first explosion element for triggering ignition.

3. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze according to claim 2, characterized in that: the second stepped hole is a third-order through hole with decreasing diameter from outside to inside, and is a ninth-order hole, a tenth-order hole and an eleventh-order hole in sequence; the centrifugal safety module (4) comprises a centrifugal pin (41), a blocking screw (42) and a centrifugal spring (43), wherein the centrifugal spring (43) is sleeved on the centrifugal pin (41) and is preloaded into a tenth-order hole; the head of the centrifugal pin (41) is provided with an annular boss which is used for being matched with a step surface between a tenth-order hole and an eleventh-order hole to realize limit, the inner end head is cylindrical, and the inner end head stretches into a sixth-order hole; the blocking screw (42) positioned in the ninth-order hole is fixed at the outer end of the centrifugal pin (41) and used for restraining the centrifugal pin (41) along the fuze radial direction, and the outer end of the centrifugal pin (41) is hemispherical, contacts with the inner wall of the protective cap (1) and is limited by the inner wall of the protective cap.

4. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze according to claim 3, characterized in that: the rotor seat module (5) comprises a bottom screw (51), an explosion-proof mechanism (53) and two explosion-proof tubes (52), the mouth parts of the two explosion-proof tubes (52) are oppositely overlapped at the center bottom of the explosion-proof mechanism (53), and the explosion-proof mechanism (53) is fixed in an eighth-order hole at the bottom of the first stepped hole through the bottom screw (51).

5. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze as recited in claim 4, wherein: the explosion-proof mechanism (53) comprises a rotor seat (531), a rotor (532), a rotor cover (533), a first striking 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 provided with a third axial blind hole with two open ends communicated with an eighth through hole along the axial eccentricity, the top end of the positioning pin (534) is pressed into the third axial blind hole, and the lower end of the positioning pin downwards passes through the rotor cover (533) and stretches into a preset blind hole of the rotor seat (531), so that the rotor seat (531) is prevented from rotating relative to the fuse body (2) to realize directional positioning; a bottom screw (51) in threaded connection with the fuze body (2) is sleeved below the rotor seat (531), and the explosion-proof mechanism (53) and the explosion-propagating tube (52) are fixed in the fuze body (2); a fifth stepped hole, which is an eighteenth stepped hole and a nineteenth stepped hole from top to bottom, is formed in the center of the top surface of the rotor seat (531), the rotor (532) is arranged in the fifth stepped hole, the rotating shaft of the rotor (532) extends upwards out of the 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 eccentric direction; a sixth stepped hole with diameters decreasing from bottom to top is formed in the bottom of the rotor seat (531) in an eccentric manner along the axial direction, and the sixth stepped hole, the twenty-first stepped hole and the twenty-second stepped hole are formed in sequence, and a squatting 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 fuze body (2), and a detonating tube (52) is arranged in the fourth axial blind hole; the outer side surface of the rotor seat (531) is radially provided with a third through hole which is communicated with an eighteenth order hole and a twenty second order hole, and the front part of the bumper 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 eccentricity, the rotor cover (533) is provided with a fifth through hole along the axial eccentricity, 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 and used for adjusting the radial centroid position of the rotor component; a seventh stepped hole is formed in the top surface of the rotor (532) from top to bottom, a twenty-third stepped hole, a twenty-fourth stepped hole, a twenty-fifth stepped hole, a twenty-sixth stepped hole and a twenty-seventh stepped hole are sequentially formed in the top surface of the rotor, a first firing pin (536) is riveted in the twenty-fourth stepped hole and limited by a step surface between the twenty-fourth stepped hole and the twenty-fifth stepped hole, four eccentric fire transmission holes are uniformly distributed on 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 stepped hole downwards; the rotor seat (531) is provided with a pressure relief blind hole right below the flame detonator (539); the rotor (532) is provided with an eccentric axial through groove which is used for being matched with the bumper safety module (7) and the fire cap rod (36) to fix the rotor (532) at the assembling position so as to realize redundant safety; the eccentric axial through notch part on the rotor (532) is provided with a bulge for realizing the fault protection; the top surface of the rotor (532) is provided with a fifth axial blind hole which is symmetrical about the central axis of the seventh stepped hole, the rotation stop pin (537) is in a stepped shaft shape, the large end of the rotation stop pin is pressed into the fifth axial blind hole and is fixed by point riveting, the small end of the rotation stop pin passes through the rotor cover (533), and the small end of the rotation stop pin is positioned in an arc-shaped groove formed in the rotor cover (533); the rotor cover (533) is fixed on the rotor seat (531) through two screws (535) and two positioning pins (534); the torsion spring (538) is in a pre-torsion state, one end of the torsion spring is sleeved in an axial through groove of the rotor (532), and the other end of the torsion spring is clamped in a concave groove formed by a bulge of the rotor cover (533) through a spring head of the torsion spring and is clung to the bulge.

6. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze as recited in claim 5, wherein: the squat pin insurance module (6) comprises a squat pin (61), a squat spring (62) and a gasket (63); the recoil pin (61) is positioned in the twenty-first order hole and the twenty-second order hole, is limited by a step surface between the twenty-first order hole and the twenty-second order hole, and the front end of the recoil pin (61) penetrates through a radial hole of the bumper safety module (7) to extend into the twenty-second order 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 twentieth stepped hole through point riveting.

7. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze as recited in claim 6, wherein: the third stepped hole is a third-order through hole with decreasing outer-to-inner diameter, and sequentially comprises a twelfth-order hole, a thirteenth-order hole and a fourteenth-order hole, the bumper safety module (7) comprises a bumper (71), a releasing spring (72), a spiral ring (73), a steel gasket (74) and a sealing ring (75), and more than half of the third stepped hole is arranged in the third stepped hole along the radial direction and extends into the rotor seat (531) for implementing contact chamber safety and discharge chamber safety relief for the rotor (532); the bumper (71) is a revolving body, the middle part of the bumper is thicker and approximately enlarged, the front end of the bumper (71) stretches into a radial groove of the rotor (532), the middle part of the bumper passes through a third through hole, the tail part of the bumper is arranged in a twelfth order hole, a thirteenth order hole and a fourteenth order hole, the tail end of the bumper is close to the inner wall of the protective cap (1), and the inner wall of the protective cap (1) provides transportation insurance for the bumper (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 of the bumper (71) penetrates through central through holes of the steel gasket (74) and the sealing ring (75); the coil (73) positioned in the twelfth-order hole is tightly attached to the outer side of the steel gasket (74), the tail end of the bumper (71) penetrates through the coil (73), and the coil (73) is in threaded connection with the fuse body (2) and is used for pressing the sealing ring (75) and the steel gasket (74); jie Baohuang (72) are arranged in a thirteenth step hole of the fuse body (2) after being pre-pressed, one end of Jie Baohuang (72) is propped against a step surface between the thirteenth step hole and the fourteenth step hole, and the other end is propped against an inner annular end surface of an expansion part in the middle of the bumper (71).

8. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze as recited in claim 7, wherein: the fourth stepped hole is a third-order through hole with decreasing diameter from bottom to top, and is a fifteenth-order hole, a sixteenth-order hole and a seventeenth-order hole in sequence; the squat safety mechanism module (8) comprises a safety pin (81), a sleeve (82), a spring sleeve (84), a back cover press screw (85), a spring core (86) and two safety springs (83), wherein the squat safety mechanism module (8) is arranged in a fourth stepped hole, and all parts of the squat safety mechanism module are coaxial; the upper end surface of the sleeve (82) is clung to the step surface between the sixteenth step hole and the seventeenth step hole, and the lower end surface is clung to the blind hole bottom of the back cover press screw (85) which is in threaded connection with the fuze body (2); the bottom end surface of the spring core (86) is tightly attached to the bottom of a blind hole of the bottom sealing press screw (85), and radial positioning and closing-up fixation are realized by a 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 round corner is arranged at the intersection of the thirteenth cylinder and the fourteenth cylinder, a round corner is also arranged at the intersection of the fourteenth cylinder and the fifteenth cylinder, a sixth axial blind hole is arranged upwards at the bottom of the sixteenth cylinder, the top surface of the thirteenth cylinder is closely 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 arranged in the center of the spring sleeve (84); the two safety springs (83) are in a pre-pressing state and respectively located right above and right below the spring sleeve (84), wherein the top end of the safety spring (83) located right above is abutted against the bottom of the sixth axial blind hole, and the bottom end of the safety spring (83) located right below is abutted against the inner annular surface of the spring core (86).

9. A safety forest rocket fire extinguishing bullet warhead mechanical triggering fuze as recited in claim 8, wherein: the inertial ignition module (9) comprises an inertial trigger mechanism (91) and an open pore press screw (92), wherein the inertial trigger mechanism (91) comprises a second firing pin (911), a firing pin spring (912), a second needling fire cap (913), a fire cap seat (914) and a firing sleeve (915); the fire cap seat (914) is provided with a first central fire transmission hole, the firing sleeve (915) is provided with a second central fire transmission hole, the perforated press screw (92) is provided with a third central fire transmission hole, and the first central fire transmission hole, the second central fire transmission hole and the third central fire transmission hole are communicated with one another in the same diameter to form a central fire transmission channel for the flame output of the second acupuncture fire cap (913); the fire cap seat (914) is provided with a central stepped hole, the front end of the fire cap seat (914) is provided with a second needling fire cap (913), and the rear part of the fire cap seat (914) is provided with a first central fire transmission hole; 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 tip length of the second firing pin (911); the perforating press screw (92), the firing sleeve (915), the fire cap seat (914), the second needling 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 mouth step of the firing sleeve (915) and is fixed by the mouth closing.