CN114705090B

CN114705090B - Projectile body fuze device

Info

Publication number: CN114705090B
Application number: CN202210446042.2A
Authority: CN
Inventors: 冯永具; 舒炳林
Original assignee: Guizhou Aerospace Fenghua Precision Equipment Co Ltd
Current assignee: Guizhou Aerospace Fenghua Precision Equipment Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2023-06-02
Anticipated expiration: 2042-04-26
Also published as: CN114705090A

Abstract

The invention provides an elastomer fuze device which comprises a mounting seat and a rotating block, wherein the mounting seat and the rotating block are connected with a torsion spring through a rotating shaft, an electric detonator is arranged on the rotating block, an arc-shaped first sliding groove is arranged on the mounting seat and used for accommodating the electric detonator to slide, one end of the first sliding groove is positioned in the middle of the mounting seat, and a safety screw is arranged between the rotating block and the mounting seat and used for locking the rotating block when the electric detonator deviates from the middle of the mounting seat. The fuze has the characteristics of high safety in storage and transportation and good detonation reliability, and can ensure the safety in service and use; when the rotating block is locked by the safety screw and the electric detonator deviates from the initiating explosive column in a safety state, the initiating explosive column cannot be detonated even if the electric detonator explodes, and the safety is high; and when the safety screw is opened during throwing, the electric detonator is aligned to the initiating explosive column, and the reliability is high.

Description

Projectile body fuze device

Technical Field

The invention relates to the technical field of fire extinguishing bombs, in particular to an projectile body fuze device.

Background

The airborne forest fire extinguishing bomb is mainly used in the forest fire control field, is mounted by a multi-rotor unmanned aerial vehicle to fly to the upper space of a fire scene, and is put in a selected mode. Because the interior of the airborne forest fire extinguishing bomb is provided with the initiating explosive device and the fire extinguishing agent, the fire extinguishing agent is thrown through detonation waves of the initiating explosive device, and the fire extinguishing operation is completed, the safety is very important, and the safety comprises the safety of a service process, a mounting flight and a throwing process and the detonation reliability after throwing, if the detonation is not performed, the safety of subsequent search and rescue personnel is greatly threatened. The existing airborne fire extinguishing bomb mostly adopts an electronic explosion-proof mode, the mode is greatly influenced by the environment, the explosion-proof mode is unreliable, the explosion is mostly only carried out by one explosion-proof mode such as timing or infrared, and the explosion-proof bomb is particularly easy to cause dumb.

Patent literature (application number 201721682258X) provides an air-drop fire extinguishing bomb for unmanned aerial vehicle, including body, tail and suspension mechanism, its inside is provided with intelligent fixed high fire mechanism, and through unmanned aerial vehicle power supply, intelligent fixed high fire mechanism still is connected with unmanned aerial vehicle control system, and control system is used for deciding high start forest fire extinguishing bomb, and this patent does not have any safety measure, and its detonation mode is too single simultaneously, and safety consideration is not enough in service and the use.

Patent literature (application number 2929217886326) provides an air drop type forest fire extinguishing bomb based on aviation aircraft, and this fire extinguishing bomb is mainly used in large-scale aircraft, including the body of a car, near-explosion detection mechanism of radio, body of a car, central medicine pipe and fin etc. part, set up intelligent high control chip, isolation safety mechanism and firing and pass and explode the mechanism in the fin, this patent has comparatively perfect safety measure and comparatively reliable detonating means. However, the isolation safety mechanism adopts a safety pin type isolation mechanism, the safety pin type isolation mechanism is connected with the unmanned aerial vehicle through a pull rope, the projectile body falls down in a free falling manner during throwing, and the pull rope on the unmanned aerial vehicle pulls out the safety pin, so that the falling state of the projectile body can be influenced, and the safety pin is exposed and leaked outside, so that potential safety hazards exist; in addition, the detonation mechanism adopts a fixed-height and touch double detonation mode, a long-acting battery is arranged in the detonation mechanism, the long-acting battery is used for supplying power to the intelligent fixed-height chip, and if the fire extinguishing bomb is not detonated, the fire extinguishing bomb becomes a dummy bomb with huge power. The patent is not in place for safe and reliable initiation.

Disclosure of Invention

In order to solve the technical problems, the invention provides an elastomer fuze device.

The invention is realized by the following technical scheme.

The invention provides an elastomer fuse device which comprises a mounting seat and a rotating block, wherein the mounting seat and the rotating block are connected with a torsion spring through a rotating shaft, an electric detonator is arranged on the rotating block, an arc-shaped first chute is arranged on the mounting seat and used for accommodating the electric detonator to slide, one end of the first chute is positioned in the middle of the mounting seat, a safety screw is arranged between the rotating block and the mounting seat and used for locking the rotating block when the electric detonator deviates from the middle of the mounting seat.

The radian of the first chute is 30-45 degrees.

The mounting seat is also provided with a safety pin which is used for being inserted into the rotating block for limiting; the upper end of the safety pin extends out of the mounting seat, and a spring is connected between the safety pin and the mounting seat and is used for applying upward elastic force to the safety pin.

The electric detonator also comprises a short circuit triggering component which is used for keeping the electric detonator short circuit when in a safety state.

The short circuit triggering assembly comprises a first switch, a second switch, a delay module and a capacitor, wherein a loop is formed by the capacitor, the first switch, the delay module and the second switch in sequence, and the second switch is connected with the electric detonator in parallel.

The short-circuit triggering assembly further comprises a circuit board, wherein the circuit board is fixed at the bottom of the mounting seat and is used for electrically connecting the first switch, the second switch, the delay module, the capacitor and the electric detonator.

The short circuit triggering assembly further comprises a socket, wherein the socket is used for being connected with an external onboard power source to charge the capacitor.

The short circuit triggering assembly further comprises a shell and an insulating shaft, a spring is arranged between the upper end of the insulating shaft and the shell, and the lower end of the insulating shaft penetrates through the shell; the inside of the shell is provided with an insulating ring, the insulating shaft is provided with two conductive shoulders, the insulating ring is provided with two conductive rings, and the distance between the two conductive rings is different from the distance between the two shoulder structures.

The lower end of the insulating shaft is contacted with the rotating block, and a through hole or a counter bore which can enable the lower end of the insulating shaft to pass through is arranged on the rotating block.

The rotating block is provided with a second chute which can be used for the lower end of the insulating shaft to slide, and the through hole or the counter bore is positioned at one end of the second chute.

At least one end of the shell is also provided with an insulating screw cover.

And a guide pin is further arranged between the side surface of the insulating shaft and the shell, and the guide pin is in sliding connection with the shell or the insulating shaft.

The short circuit triggering assembly further comprises a grounding switch, and the first switch and the delay module are connected in series and then connected with the grounding switch in parallel.

The short circuit trigger assembly further comprises a sliding block and a contact pin, a cavity which is opened downwards is formed in the mounting seat, the sliding block is arranged in the cavity, an insulating plate is plugged below the cavity, the contact pin penetrates through the insulating plate, and a spring is arranged between the insulating plate and the sliding block.

The insulation board is spaced from the circuit board, and the contact pins are fixed on the circuit board.

The invention has the beneficial effects that:

the fuse has the characteristics of high safety in storage and transportation and good detonation reliability, and can ensure the safety in service and use.

When the rotating block is locked by the safety screw and the electric detonator deviates from the initiating explosive column in a safety state, the initiating explosive column cannot be detonated even if the electric detonator explodes, and the safety is high; and when the safety screw is opened during throwing, the electric detonator is aligned to the initiating explosive column, and the reliability is high.

Through short circuit trigger assembly's first switch, second switch, time delay module etc. formed the dual insurance of electric detonator when insurance state, ensured the safety of electric detonator, can accurately set for the time delay when putting in, the fire extinguishing effect is good.

The third triple insurance of the electric detonator is formed through the grounding switch of the short circuit triggering assembly, so that the explosion or the emptying electric energy of the electric detonator is ensured during grounding, the explosion of the dummy detonator in the later period is prevented, and the potential safety hazard of personnel is reduced.

The four-fold insurance is adopted, so that the safety of the projectile body is improved, and the phenomenon that the dummy projectile damages the rescue personnel is effectively avoided.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is an a-direction view of fig. 2.

Fig. 4 is a circuit diagram of a short circuit trigger assembly.

Fig. 5 is a schematic structural view of a short trigger assembly.

In the figure: 9-mounting seats; 10-rotating blocks; 11-a rotating shaft; 12-torsion springs; 13-an electric detonator; 14-a first chute; 15-a safety screw; 16-a safety pin; 17-a short-circuit trigger assembly; 18-a second chute;

20-a first switch; 21-a second switch; 22-a delay module; 23-capacitance; 24-a circuit board; 25-sockets; 26-a ground switch;

30-a housing; 31-an insulating shaft; 32-insulating rings; 33-conductive shoulders; 34-a conductive ring; 35-insulating screw cap; 36-a guide pin;

40-sliding blocks; 41-pins; 42-insulating plates; 100-on-board power supply.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.

See fig. 1-5:

the invention provides an elastomer fuse device which comprises a mounting seat 9 and a rotating block 10, wherein the mounting seat 9 and the rotating block 10 are connected with a torsion spring 12 through a rotating shaft 11, an electric detonator 13 is arranged on the rotating block 10, an arc-shaped first sliding groove 14 is arranged on the mounting seat 9, the first sliding groove 14 is used for accommodating the electric detonator 13 to slide, one end of the first sliding groove 14 is positioned in the middle of the mounting seat 9, a safety screw 15 is arranged between the rotating block 10 and the mounting seat 9, and the safety screw 15 is used for locking the rotating block 10 when the electric detonator 13 deviates from the middle of the mounting seat 9.

Principle of: in the safety state, the electric detonator 13 deviates from the middle of the mounting seat 9, the rotating block 10 is locked by the safety screw 15, and the torsion spring 12 stores prestress; the electric detonator 13 is used for triggering the primary explosive in the middle of the projectile body, the shock wave of the electric detonator 13 is conical, the central energy is maximum, the edge is weaker, when the electric detonator 13 deviates from the primary explosive, if the electric detonator 13 explodes, the front of the shock wave avoids the primary explosive, the explosion of the primary explosive can be avoided, and the safety guarantee is provided for the transportation and storage of the fire extinguishing bomb. Before the fire extinguishing bomb is projected, the safety screw 15 is screwed down, the rotating block 10 loses the locking of the safety screw 15, the electric detonator 13 rotates under the action of the torsion spring 12 to the middle of the rotating block 10, namely, the detonating powder is aligned, and at the moment, the explosion impact wave energy of the electric detonator 13 is transmitted into the detonating powder on the front surface, so that the detonating powder is ensured to be detonated. The invention can be used for extinguishing bomb and is applicable to other bomb bodies which are positively triggered by the shock wave of the electric detonator 13.

The fuse has the characteristics of high safety in storage and transportation and good detonation reliability, and can ensure the safety in service and use. When the rotating block 10 is locked by the safety screw 15 and in a safety state, the electric detonator 13 deviates from the initiating explosive column, so that the initiating explosive column cannot be detonated even if the electric detonator 13 explodes, and the safety is high; the safety screw 15 is opened during throwing, and the electric detonator 13 is aligned with the initiating explosive column, so that the reliability is high.

The radian of the first chute 14 is 30-45 degrees. When the electric detonator 13 is mounted on the projectile body, the axial distance between the electric detonator 13 and the initiating explosive column is not more than 3mm; this arrangement constrains the deviating angle and spacing of the electric detonator 13, which is data obtained by a large number of tests, ensuring safety in the safe state and ensuring detonation of the primary explosive during projection.

The inventors team made a number of experiments on this, and extracted part of the decisive test data as follows:

(1) angle 45 ° pitch 4mm: the safe state and the projected state were each tested 10 times. The safety state is not initiated, but the end part of the initiating explosive column is damaged; indicating that increasing the spacing brings about certain hidden danger. In the projected state (the safety is relieved, i.e. the electric detonator 13 is aligned with the initiating explosive column 6), the detonation is carried out for 3 times, and the detonation is not carried out for 7 times; the number of times of detonation is more, and the hidden trouble of dummy bombs exists when the interval is 4 mm.

(2) The angle 45 ° spacing 3mm, the safe state and the projected state were each tested 10 times. The safety state is not detonated, and the end of the detonating powder column is complete; the distance and angle are described to ensure the safety of the insurance state. Detonating 10 times under the projection state; it can be considered that there is no dummy.

(3) The angle 30 ° spacing 3mm, the safe state and the projected state were each tested 15 times. The safety state is not detonated, and the end of the detonating powder column is complete; the distance and angle are described to ensure the safety of the insurance state. Detonating 15 times under the projection state; it can be considered that there is no dummy.

(4) The angle 25 ° spacing 3mm, the safe state and the projected state were each tested 15 times. Detonating for 2 times in the safety state, not detonating for 13 times, and damaging the end face of the detonating powder column which is not detonated; it is explained that the potential risk of fire in the insurance state is large at this angle. In the projected state, the detonation is performed 15 times, and the projected state can be considered to not cause dummies.

Conclusion: the radian of the first chute 14 is 30-45 degrees, and the axial distance between the electric detonator 13 and the initiating explosive column 6 is not more than 3mm. This data is a key factor in ensuring both the fuse mechanism insurance status and the projection status to be safe and reliable.

As shown in fig. 2: the mounting seat 9 is also provided with a safety pin 16, and the safety pin 16 is used for being inserted into the rotating block 10 for limiting; the upper end of the safety pin 16 extends out of the mounting seat 9, and a spring is connected between the safety pin 16 and the mounting seat 9 and is used for applying upward elastic force to the safety pin 16. The projection operation is more convenient, and the projection preparation is convenient: when the bullet is loaded before projection, the throwing device presses the safety pin 16, and the safety screw 15 is screwed out at the moment, so that the eccentric state of the electric detonator 13 and the initiating explosive column can be temporarily maintained; during projection, the fire extinguishing bomb is directly put down, the safety pin 16 can automatically bounce under the action of the spring, and the electric detonator 13 is opposite to the primary explosive column; and there is also an opportunity to replace the safety screw 15 after the preparation for the projection, canceling the projection.

As shown in fig. 2 to 5: also included is a short circuit triggering assembly 17, the short circuit triggering assembly 17 being used to maintain the electrical detonator 13 short circuit when in a safe state. Ensuring that the electric detonator 13 does not explode in the secured state.

As in fig. 4: the short-circuit triggering assembly 17 comprises a first switch 20, a second switch 21, a delay module 22 and a capacitor 23, wherein a loop is formed by the capacitor 23, the first switch 20, the delay module 22 and the second switch 21 in sequence, and the second switch 21 is connected with the electric detonator 13 in parallel.

When in carrying, the capacitor 23 is charged in parallel with the onboard power supply 100, the first switch 20 is opened initially, the second switch 21 is closed to short-circuit the electric detonator 13, so that double insurance is formed to prevent the electric detonator 13 from explosion, and if other accidents cause the circuit to be switched on (for example, the circuit also comprises other elements and branches), the safety of the electric detonator 13 can be ensured by virtue of the short-circuit state; when the electric detonator 13 is put in, the first switch 20 is closed, the second switch 21 is opened, the short circuit state is relieved, the time delay module 22 counts time, and the electric detonator 13 is switched on and explodes after the time counting. The delay module 22 can use a plurality of delay chips connected in series, can also use the common delay module 22 of prior art, can set for delay time with terminal communication, has realized accurate timing blasting, and the fire extinguishing effect is good. The rotating block 10, the first switch 20 and the second switch 21 form triple insurance, and the safety is ensured.

The short-circuit triggering assembly 17 further comprises a circuit board 24, the circuit board 24 is fixed at the bottom of the mounting seat 9, and the circuit board 24 is used for electrically connecting the first switch 20, the second switch 21, the delay module 22, the capacitor 23 and the electric detonator 13. The structure is compact, the wires are orderly arranged, the volume of the device is reduced, and the structural stability is improved.

The short trigger assembly 17 further comprises a socket 25, the socket 25 being adapted to connect to an external on-board power supply 100 for charging the capacitor 23.

As in fig. 2 and 5: the short-circuit triggering assembly 17 further comprises a shell 30 and an insulating shaft 31, a spring is arranged between the upper end of the insulating shaft 31 and the shell 30, and the lower end of the insulating shaft 31 penetrates through the shell 30; the inside of the shell 30 is provided with an insulating ring 32, the insulating shaft 31 is provided with two conductive shoulders 33, the insulating ring 32 is provided with two conductive rings 34, and the distance between the two conductive rings 34 is different from the distance between the two shoulder structures. The conductive shoulders 33 and the conductive rings 34 can be used for connecting wires, and the pair of conductive shoulders 33 and the conductive rings 34 form the first switch 20 or the second switch 21, so that only one shoulder structure can be contacted with one conductive ring 34 at the same time, and the switching of the first switch 20 and the second switch 21 is realized.

As in fig. 2: the lower end of the insulating shaft 31 is in contact with the rotating block 10, and a through hole or a counter bore which can enable the lower end of the insulating shaft 31 to pass through is formed in the rotating block 10. When the rotating block 10 rotates to enable the electric detonator 13 to face the initiating explosive column, the through hole or the counter bore correspondingly rotates to the lower part of the insulating shaft 31, and the insulating shaft 31 sinks, so that one pair of conductive shoulders 33 and the conductive ring 34 are disconnected and the other pair of conductive shoulders are contacted, and the contact switching from the second switch 21 to the first switch 20 is realized; the setting linkage is good, the delay timing is started when the electric detonator 13 turns right, and the detonation time is convenient to accurately control.

The rotating block 10 is provided with a second chute 18 for sliding the lower end of the insulating shaft 31, and the through hole or the counter bore is positioned at one end of the second chute 18. The sliding track of the insulating shaft 31 on the rotating block 10 is accurate, so that the through holes or counter bores can be aligned accurately, and mechanical faults are prevented.

At least one end of the housing 30 is further provided with an insulating screw cap 35. The size of the axial space in the housing 30 is convenient to adjust and the assembly is convenient.

A guide pin 36 is further provided between the side surface of the insulating shaft 31 and the housing 30, and the guide pin 36 is slidably connected with the housing 30 or the insulating shaft 31. Prevent insulating shaft 31 rotation, be convenient for the wiring, prevent that the wire from twining and leading to drawing the damage on insulating shaft 31, contact failure.

As in fig. 4: the short-circuit triggering assembly 17 further comprises a grounding switch 26, and the first switch 20 and the delay module 22 are connected in series and then connected in parallel with the grounding switch 26. If the elements such as the delay module 22 and other switches are failed, the bullet is still not detonated when falling to the ground, and the grounding switch 26 is closed to play a role and is directly connected, and if the electric detonator 13 is not short-circuited and is not failed, the bullet is directly detonated; if the electric detonator 13 is short-circuited or fails, the stored electricity of the capacitor 23 is emptied, avoiding the risk of a post-detonation of the dummy.

As in fig. 1: the short circuit triggering assembly 17 further comprises a slider 40 and a contact pin 41, a cavity which is opened downwards is arranged on the mounting seat 9, the slider 40 is arranged in the cavity, an insulating plate 42 is plugged under the cavity, the contact pin 41 penetrates through the insulating plate 42, and a spring is arranged between the insulating plate 42 and the slider 40. The sliding block 40 and the contact pin 41 are used for connecting wires to form the grounding switch 26; under the support of the spring, the sliding block 40 is separated from the contact pin 41, and when the fire extinguishing bomb lands, under the action of inertia, the sliding block 40 overcomes the spring force to downwards contact the contact pin 41, so that the grounding switch 26 is closed.

Further, the insulating plate 42 is spaced from the circuit board 24, and the pins 41 are fixed to the circuit board 24. When the slider 40 moves, the insulating plate 42 can be pushed out of the cavity by the reaction force of the spring, so that the spring cannot jack up the slider 40 again, the contact time of the contact pin 41 and the slider 40 is prolonged, and the electric energy of the capacitor 23 is fully discharged.

Claims

1. A projectile body fuze device, characterized in that: including mount pad (9), rotating block (10), mount pad (9) are connected with torsional spring (12) through pivot (11) with rotating block (10), are equipped with electric detonator (13) on rotating block (10), are equipped with curved first spout (14) on mount pad (9), and first spout (14) are used for holding electric detonator (13) and slide, and first spout (14) one end is located in the middle of mount pad (9), is equipped with safety screw (15) between rotating block (10) and mount pad (9), and safety screw (15) are used for locking rotating block (10) when electric detonator (13) deviate from in the middle of mount pad (9).

2. The elastomeric fuse apparatus of claim 1, wherein: the mounting seat (9) is also provided with a safety pin (16), and the safety pin (16) is used for being inserted into the rotating block (10) for limiting; the upper end of the safety pin (16) extends out of the mounting seat (9), and a spring is connected between the safety pin (16) and the mounting seat (9) and is used for applying upward elastic force to the safety pin (16).

3. The elastomeric fuse apparatus of claim 1, wherein: the electric detonator safety device is characterized by further comprising a short circuit triggering assembly (17), wherein the short circuit triggering assembly (17) is used for keeping the electric detonator (13) short circuit when in a safety state, the short circuit triggering assembly (17) comprises a first switch (20), a second switch (21), a delay module (22) and a capacitor (23), a loop is formed by the capacitor (23), the first switch (20), the delay module (22) and the second switch (21) in sequence, and the second switch (21) is connected with the electric detonator (13) in parallel.

4. The elastomeric fuse apparatus of claim 3, wherein: the short circuit triggering assembly (17) further comprises a circuit board (24), wherein the circuit board (24) is fixed at the bottom of the mounting seat (9), and the circuit board (24) is used for electrically connecting the first switch (20), the second switch (21), the delay module (22), the capacitor (23) and the electric detonator (13).

5. The elastomeric fuse apparatus of claim 3 or 4, wherein: the short circuit triggering assembly (17) further comprises a shell (30) and an insulating shaft (31), a spring is arranged between the upper end of the insulating shaft (31) and the shell (30), and the lower end of the insulating shaft (31) penetrates through the shell (30); an insulating ring (32) is arranged on the inner side of the shell (30), two conductive shoulders (33) are arranged on the insulating shaft (31), two conductive rings (34) are arranged on the insulating ring (32), and the distance between the two conductive rings (34) is different from the distance between the two shoulder structures.

6. The elastomeric fuse apparatus of claim 5, wherein: the lower end of the insulating shaft (31) is in contact with the rotating block (10), and a through hole or a counter bore which can enable the lower end of the insulating shaft (31) to pass through is formed in the rotating block (10).

7. The elastomeric fuse apparatus of claim 6, wherein: the rotary block (10) is provided with a second chute (18) which can be used for sliding the lower end of the insulating shaft (31), and the through hole or the counter bore is positioned at one end of the second chute (18).

8. The elastomeric fuse apparatus of claim 3 or 4, wherein: the short circuit triggering assembly (17) further comprises a grounding switch (26), and the first switch (20) and the delay module (22) are connected in series and then connected with the grounding switch (26) in parallel.

9. The elastomeric fuse apparatus of claim 8, wherein: the short circuit triggering assembly (17) further comprises a sliding block (40) and a contact pin (41), a cavity which is downwards opened is formed in the mounting seat (9), the sliding block (40) is arranged in the cavity, an insulating plate (42) is plugged below the cavity, the contact pin (41) penetrates through the insulating plate (42), and a spring is arranged between the insulating plate (42) and the sliding block (40).

10. The elastomeric fuse apparatus of claim 9, wherein: in the case that the short circuit triggering assembly (17) further comprises a circuit board (24), a space is reserved between the insulating board (42) and the circuit board (24), and the contact pin (41) is fixed on the circuit board (24).