CN113218259A

CN113218259A - High-sensitivity impact fire cap for fuse

Info

Publication number: CN113218259A
Application number: CN202110529303.2A
Authority: CN
Inventors: 王雨时; 薛更强
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-08-06
Anticipated expiration: 2041-05-14
Also published as: CN113218259B

Abstract

The invention discloses a high-sensitivity impact fire cap for a fuse, which comprises a tube shell, fire cap chemicals and a cushion seat, wherein the tube shell is cylindrical, the closed end of the cylinder is an input end, and the open end of the cylinder is an output end. Fire cap medicament and base of a pad set up in the tube from the top down, fire cap medicament and input contact, the fixed base of a pad of output binding off, and it is sealed through sealing paint, the base of a pad comprises a plurality of cylinders, the cylindrical diameter scales up from the top down, it has N to be cyclic annular equidistant distribution's through-hole about first order cylinder to open from the base bottom surface to second order cylinder top surface upwards, and above-mentioned through-hole does not take place to interfere with first order cylinder, it seals to fill combustible sealing agent in the through-hole, be located the inner wall contact of the cylindrical circumference outer wall of below and tube. The fire cap has the advantages that the structural strength of the fire cap is improved by the cushion, the fire cap medicament is favorable for ignition due to the support of the cushion when the head of the fuse collides with a target, and the high trigger sensitivity requirement of a bullet trigger fuse for attacking extremely weak targets such as unmanned aerial vehicles, airborne balloons and the like is met.

Description

High-sensitivity impact fire cap for fuse

Technical Field

The invention belongs to the technology of fuse explosion elements, and particularly relates to a high-sensitivity impact fire cap for a fuse.

Background

Extremely weak targets such as unmanned aerial vehicles and airborne balloons require that the fuze should have higher trigger sensitivity. The existing high-trigger-sensitivity fuse mostly adopts the trigger principle of a collision fire cap (detonator), and the head cover foil of the fuse collides the collision fire cap or the collision detonator when the fuse strikes a target. However, these impact fire caps or impact detonators are needle-pricked fire caps or needle-pricked detonators which are not special impact fire caps or impact detonators. When the unmanned aerial vehicle collides with a target, the strength of the bottom of the unmanned aerial vehicle is weaker, and a central fire transfer hole is reserved on a structural base body corresponding to the base body, so that the base body cannot be assisted by supporting and reinforcing functions, and therefore the triggering sensitivity of the unmanned aerial vehicle is difficult to improve, and the base body cannot meet the requirement of high triggering sensitivity of extremely weak targets such as an unmanned aerial vehicle and an airborne balloon.

Disclosure of Invention

The invention aims to provide a high-sensitivity impact fire cap for a fuse, which aims to improve the trigger sensitivity when a warhead trigger fuse adopting the impact fire cap trigger principle attacks extremely weak targets such as unmanned aerial vehicles and airborne balloons.

The technical solution for realizing the purpose of the invention is as follows: a high-sensitivity impact fire cap for a fuse comprises a tube shell, fire cap chemicals and a cushion seat, wherein the tube shell is cylindrical, the closed end of the cylindrical shell is an input end, and the open end of the cylindrical shell is an output end. Fire cap medicament and base of a pad set up in the tube from the top down, fire cap medicament and input contact, the fixed base of a pad of output binding off, and it is sealed through sealing paint, the base of a pad comprises a plurality of cylinders, the cylindrical diameter scales up from the top down, it has N to be cyclic annular equidistant distribution's through-hole about first order cylinder to open from the base bottom surface to second order cylinder top surface upwards, and above-mentioned through-hole does not take place to interfere with first order cylinder, it seals to fill combustible sealing agent in the through-hole, be located the inner wall contact of the cylindrical circumference outer wall of below and tube.

Furthermore, the high-sensitivity percussion cap for the primer further comprises a support cylinder, the support cylinder is arranged in the tube shell and clings to the inner wall of the tube shell, and the fire cap medicament and the upper part of the pad seat are both positioned in the support cylinder, so that one end of the support cylinder props against the input end, and the other end of the support cylinder props against the top surface of the cylinder at the lowest part of the pad seat.

The fire cap has the advantages that the structural strength of the fire cap is improved by the cushion, the fire cap medicament is favorable for ignition due to the support of the cushion when the head of the fuse collides with a target, and the high trigger sensitivity requirement of a bullet trigger fuse for attacking extremely weak targets such as unmanned aerial vehicles, airborne balloons and the like is met.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention uses the principle of primer, adds the cushion at the bottom of the tube shell to improve the structural strength of the fire cap, so that the fire cap medicament is supported by the cushion when the fire cap impacts the target to reduce energy loss and be beneficial to firing.

(2) The vacant site (blind hole) formed at the closed end of the tube shell forms a fire transfer channel naturally without influencing the axial positioning and supporting of the fire cap.

(3) The high-sensitivity trigger is particularly suitable for high trigger sensitivity requirements of extremely weak target fuses such as unmanned aerial vehicles and airborne balloons, and is matched with a firing mechanism of a percussion cap for triggering the fuses by a bullet to serve as the percussion cap.

Drawings

Fig. 1 is a schematic axial cross-sectional view of a first alternative construction of a high sensitivity impact cap for a fuse.

Fig. 2 is an axial cross-sectional view of a second alternative construction of a high sensitivity impact cap for a fuse.

In the figure, 1 is a pipe shell, 2 is a fire cap medicament, 3 is a cushion seat, 4 is a combustible sealant, 5 is sealing paint, and 6 is a support.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

Example 1

With reference to fig. 1, the high-sensitivity impact fire cap for the fuze comprises a tube shell 1, fire cap chemicals 2 and a cushion 3, wherein the tube shell 1 is cylindrical, the closed end of the cylinder is used as an input end, the open end is used as an output end, and the center of the input end is thinned to facilitate excitation; fire cap medicament 2 and pad seat 3 from the top down set up in tube 1, and fire cap medicament 2 contacts with the input, and the fixed pad seat 3 of output binding off to it is sealed through sealing paint 5, pad seat 3 comprises a plurality of cylinders from the top down connect gradually, and the cylindrical diameter scales up from the top down, and it is first order cylinder to be located the top, and downward sequencing in proper order, and it has a N through-hole to open to the second order cylinder top surface upwards to fill 3 bottom surfaces of pad seat from 3, N =4~8, and a N through-hole is the annular distribution with first order cylinder equidistant, and the through-hole does not take place to interfere with first order cylinder, fills combustible sealing agent 4 in the through-hole and seals, is located the cylindrical circumference outer wall of below and the inner wall contact of tube 1.

Further, the edge of the outer cylindrical surface of each step of cylinder of the cushion seat 3 is beveled. One end of the fire cap medicament 2 is contacted with the output end, the other end is contacted with the cushion seat 3, and the first-step cylinder of the cushion seat 3 is embedded into the fire cap medicament 2. After the output end is closed up and the cushion seat 3 is fixed, the diameter of a hollow part formed by the wall thickness of the tube shell 1 at the closing-up position is larger than the diameter of an excircle circle of the N through holes which are annularly arranged on the cushion seat 3, and a fire transfer channel is naturally formed. The material of the fire cap medicament 2 is traditional primer, such as stevensite lead 50%, tetrazene 5%, barium nitrate 20% and antimony sulfide 25%. The cushion seat 3 is made of a material which has low density and high strength and is compatible with the fire cap medicament 2. The combustible sealant 4 material is a silicone sealant. The sealing paint 5 is made of Q98-1 nitro-glue.

Example 2

With reference to fig. 2, the high-sensitivity impact fire cap for a fuse comprises a tube shell 1, a fire cap medicament 2, a pad 3 and a support 6, wherein the tube shell 1 is cylindrical, the closed end of the cylindrical tube is used as an input end, the open end is used as an output end, and the center of the input end is thinned for excitation; fire cap medicament 2 and pad seat 3 from the top down set up in tube 1, and fire cap medicament 2 contacts with the input, and the fixed pad seat 3 of output binding off to it is sealed through sealing paint 5, pad seat 3 comprises a plurality of cylinders from the top down connect gradually, and the cylindrical diameter scales up from the top down, and it is first order cylinder to be located the top, and downward sequencing in proper order, and it has a N through-hole to open to the second order cylinder top surface upwards to fill 3 bottom surfaces of pad seat from 3, N =4~8, and a N through-hole is the annular distribution with first order cylinder equidistant, and the through-hole does not take place to interfere with first order cylinder, fills combustible sealing agent 4 in the through-hole and seals, is located the cylindrical circumference outer wall of below and the inner wall contact of tube 1. A branch 6 sets up in tube 1, hugs closely 1 inner wall of tube, and the upper portion of fire cap medicament 2 and pad seat 3 all is located a branch 6 for a branch 6 one end supports the input, and the other end supports the cylindrical top surface at the below of pad seat 3.

Further, the edge of the outer cylindrical surface of each step of cylinder of the cushion seat 3 is beveled. One end of the fire cap medicament 2 is contacted with the input end, the other end is contacted with the cushion seat 3, and the first-step cylinder of the cushion seat 3 is embedded into the fire cap medicament 2. After the output end is closed up and the cushion seat 3 is fixed, the diameter of a hollow part formed by the wall thickness of the tube shell 1 at the closing-up position is larger than the diameter of an excircle circle of the N through holes which are annularly arranged on the cushion seat 3, and a fire transfer channel is naturally formed. The material of the fire cap medicament 2 is traditional primer, such as stevensite lead 50%, tetrazene 5%, barium nitrate 20% and antimony sulfide 25%. The combustible sealant 4 material is a silicone sealant. The sealing paint 5 is made of Q98-1 nitro-glue. The cushion seat 3 is made of a material which has low density and high strength and is compatible with the fire cap medicament 2. The base 3 is additionally arranged at the bottom of the tube shell 1, so that the structural strength of the fire cap is improved, and the fire cap medicament is supported by the base when a fuse hits a target, so that the energy loss is reduced, and the fire is favorably ignited. The pad seat 3 is provided with a plurality of circular fire-transmitting through holes at the step, and the through holes are sealed by a combustible sealant 4 at ordinary times. After the tube shell 1 is closed, the closed end is sealed by the sealing paint 5, and a vacant site (blind hole) formed at the closed end after the tube shell 1 is closed naturally forms a fire transfer passage without influencing the axial positioning and supporting of the fire cap.

When the fuse hits a target, the cover foil at the head of the fuse body is extruded by the counter force of the target to downwards hit the input end of the impact cap, the fire cap medicament is impacted, crushed and rubbed to form hot spots, and then the hot spots are quickly diffused to ignite the whole charge. Then the fire is transferred to the flame detonator behind the fire transfer channel of the base 3 and the fire transfer channel naturally formed at the closing end of the tube shell 1, and the triggering and firing process is completed.

The edge of the outer cylindrical surface of each step of cylinder of the base 3 is beveled, which is beneficial to further improving the ignition reliability when the fuse laterally impacts the target, thereby further improving the ground blasting and large-attack-angle ignition performance of the fuse. The base 3 improves the structural strength of the fire cap, and fire cap medicament is favorable for firing due to the support of the base when the fuse head collides with a target, so that the fire cap is suitable for the requirement of high triggering sensitivity of a bullet triggering fuse to attack extremely weak targets such as unmanned aerial vehicles and airborne balloons. The invention slightly increases the height size of the fire cap under the condition of not increasing the diameter size of the fire cap.

The present invention relates to the field of cremation and mechanical strength, material dynamics and collision mechanics, which are not easily imaginable to the skilled person. The difficulty of the invention is to obviously improve the fire cap impact ignition sensitivity on the premise of ensuring the safety.

The fire cap collision sensitivity is obviously improved, and the fuze triggering sensitivity adopting the collision ignition principle is also correspondingly and obviously improved, so that extremely weak targets such as unmanned aerial vehicles and air floating balloons can be effectively dealt with.

Claims

1. A high-sensitivity impact fire cap for a fuse comprises a tube shell (1) and a fire cap medicament (2), wherein the tube shell (1) is cylindrical, the closed end of the cylinder is used as an input end, the open end of the cylinder is used as an output end, and the center of the input end is thinned so as to be convenient for excitation; the method is characterized in that: still including filling up seat (3), fire cap medicament (2) and filling up seat (3) from the top down set up in tube (1), and fire cap medicament (2) and input contact, output binding off fixed filling up seat (3), and sealed through sealing paint (5), fill up seat (3) and connect gradually the constitution from the top down by a plurality of cylinders, the cylindrical diameter from the top down scales up, be located the top for first order cylinder, downward sequencing in proper order, it has a N through-hole to open from filling up seat (3) bottom surface to second order cylinder top surface, N =4~8, N through-hole is cyclic annular equidistant distribution about first order cylinder, and above-mentioned through-hole does not take place to interfere with first order cylinder, fills combustible sealing agent (4) in the through-hole and seals, is located the cylindrical circumference outer wall of below and the inner wall contact of tube (1).

2. The high sensitivity percussion cap for fuzes according to claim 1, wherein: the edge of the outer cylindrical surface of each step of cylinder of the cushion seat (3) is beveled.

3. A high sensitivity percussion cap for fuzes according to claim 1 or 2, characterized in that: one end of the fire cap medicament (2) is contacted with the output end, the other end is contacted with the cushion seat (3), and the first-step cylinder of the cushion seat (3) is embedded into the fire cap medicament (2).

4. The high sensitivity percussion cap for fuzes according to claim 1, wherein: after the output end of the tube shell (1) is closed up and fixed with the pad seat (3), the diameter of a hollow part formed by the wall thickness of the tube shell (1) at the closed position is larger than the diameter of the circumscribed circle of the N through holes arranged in the ring shape on the pad seat (3), and a fire transfer channel is formed naturally.

5. The high sensitivity percussion cap for fuzes according to claim 1, wherein: still include a branch section of thick bamboo (6), a branch section of thick bamboo (6) set up in tube (1), hug closely tube (1) inner wall, and the upper portion of fire cap medicament (2) and pad seat (3) all is located a branch section of thick bamboo (6) for a branch section of thick bamboo (6) one end supports the input, and the other end supports the cylindrical top surface at the below of pad seat (3).

6. A high sensitivity impact fire cap for a fuse according to any one of claims 1 to 5 wherein: the fire cap medicament (2) is made of traditional primer mix.

7. A high sensitivity impact fire cap for a fuse according to any one of claims 1 to 5 wherein: the cushion seat (3) is made of a material which has low density and high strength and is compatible with the fire cap medicament (2).

8. A high sensitivity impact fire cap for a fuse according to any one of claims 1 to 5 wherein: the combustible sealant (4) material is a silicone sealant.

9. A high sensitivity impact fire cap for a fuse according to any one of claims 1 to 5 wherein: the sealing paint (5) is made of Q98-1 nitro-glue.