CN113624078B

CN113624078B - Long-delay acupuncture explosion element with flush input end face for fuze

Info

Publication number: CN113624078B
Application number: CN202110900445.5A
Authority: CN
Inventors: 王雨时; 李俊鸿
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2023-01-13
Anticipated expiration: 2041-08-06
Also published as: CN113624078A

Abstract

The invention discloses a long delay acupuncture explosion element for a fuse with flush input end face, which comprises a cylindrical tube shell, and a reinforcing cap, acupuncture chemicals, a first delay chemical, a second delay chemical, output chemicals, a bottom cap and a plurality of gaskets which are coaxially arranged in the tube shell; the outer end face of the top of the reinforcing cap at the input end is flush with the input end of the tube shell, namely the vacancy depth of the needling end face is 0, so that the interface with the detonator ignition mechanism is friendly, and the design of the firing pin and the pricking motion of the firing pin is facilitated. And the inner powder charge is successively loaded and pressed from the output end, the accumulated error of the powder charge height is on the bottom surface of the output end, and finally the bottom surface of the powder charge output end is basically flush with the end surface of the output end of the pipe shell by adjusting through a gasket and assisting with paint or glue. The structure does not change the external dimension of the explosive element.

Description

Long-delay acupuncture explosion element with flush input end face for fuze

Technical Field

The invention belongs to the technology of fuse explosion elements, and particularly relates to a long-delay acupuncture explosion element for a fuse with a flush input end face.

Background

At present, the long-delay acupuncture explosive element is loaded and charged from an input end in a successive pressing mode, and the acupuncture end face position is a closed ring in the pressing process, so that the size of the end face position of the input end, namely the depth of an empty position of the input end, is greatly dispersed. For example, a long delay tube with a length of 25 mm and a delay of 12 s, the depth of the vacancy (the dimension in FIG. 1)A) The maximum spread can reach 2 mm, which causes the firing pin in the fuze and the pricking movement design thereof to occupy larger axial space, and influences the overall optimization design of the fuze.

Disclosure of Invention

The invention aims to provide a long-delay acupuncture explosion element for a fuse, the input end face of which is flush, which is friendly to interface with a fuse interface, is beneficial to reducing occupied axial space of the fuse and realizes overall optimized design.

The technical solution for realizing the purpose of the invention is as follows: a long delay acupuncture explosion element for a fuse with a flush input end face comprises a cylindrical tube shell, and a reinforcing cap, acupuncture powder, first delay powder, second delay powder, output powder, a bottom cap and a plurality of gaskets which are coaxially arranged in the tube shell; the acupuncture medicine, the first delay medicine, the second delay medicine and the output medicine are sequentially arranged from front to back, the reinforcing cap serves as an input end, the top surface of the reinforcing cap is flush with the top surface of the tube shell, thinning processing is performed at the center of the input end to facilitate acupuncture excitation, the front ends of all the acupuncture medicines and the first delay medicine are filled in the reinforcing cap, the bottom ends of all the output medicines and the second delay medicine are filled in the bottom cap, a plurality of gaskets are stacked in vacant positions between the bottom surface of the bottom cap and the end surface of the output end of the tube shell, and the bottom surface of the gasket located at the lowest position is flush with the end surface of the output end of the tube shell.

Furthermore, the number of the gaskets is adjusted according to the vacant space between the bottom surface of the bottom cap and the end surface of the output end of the pipe shell, and the last vacant space is filled by sealing paint or sealant.

Further, the gasket thickness is not exactly the same.

Further, when the fire cap is used, the bottom cap is of a flat bottom structure.

Further, when the energy-gathering cap is used for a detonator, the bottom cap is of an energy-gathering pit structure.

Compared with the prior art, the invention has the beneficial effects that: the interface of the firing mechanism of the fuze is friendly, the firing pin and the stab motion design thereof are facilitated, the axial space occupied by the firing mechanism of the fuze can be reduced, and the optimized design of the fuze is realized.

Drawings

Fig. 1 shows a prior art priming long delay needle-punched explosive element.

Fig. 2 is an axial sectional view of a first embodiment of a long delay needle-punched blasting element for fuze with flush input end face.

Fig. 3 is an axial cross-sectional view of a second embodiment of a long delay needle detonation element for fuzes with flush input end faces.

In the figure, 1 is a tube shell, 2 is a reinforcing cap, 3 is a bottom cap, 4 is a needle-punching medicine, 5 is a first delay medicine, 6 is a second delay medicine, 7 is an output medicine, and 8 is a gasket.

Detailed Description

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

Example 1

With reference to fig. 2, the long delay needle-punched explosive element for fuze with flush input end surface of the invention comprises a cylindrical tube shell 1, a reinforcing cap 2, a needle-punched explosive 4, a first delay explosive 5, a second delay explosive 6, an output explosive 7, a bottom cap 3 and a plurality of gaskets 8 which are coaxially arranged in the tube shell 1 when being used as a fire cap; the acupuncture powder 4, the first delay powder 5, the second delay powder 6 and the output powder 7 (flame expanding powder and/or initiating powder) are sequentially arranged from front to back, the reinforcing cap 2 serves as an input end, the top surface of the reinforcing cap 2 is flush with the top surface of the tube shell 1, thinning processing is carried out on the center of the input end to facilitate acupuncture excitation, the front ends of all the acupuncture powder 4 and the first delay powder 5 are filled in the reinforcing cap 2, the bottom ends of all the output powder 7 and the second delay powder 6 are filled in the bottom cap 3, a plurality of gaskets 8 are stacked in vacant positions between the bottom surface of the bottom cap 3 and the end face of the output end of the tube shell 1, and the bottom surface of the gasket 8 located at the lowest position is flush with the end face of the output end of the tube shell 1.

Furthermore, the number of the gaskets 8 is adjusted according to the vacant space between the bottom surface of the bottom cap 3 and the end surface of the output end of the tube shell 1, and the last vacant space is filled by sealing paint or sealant. The thickness of the gasket 8 is not completely the same and is divided into thick and thin so as to be beneficial to finely filling the depth of the vacancy and further realize the leveling.

When the

delay elements

5 and 6 are pressed, the reinforcing cap 2 is radially expanded by the piercing of the medicament 4 and is pressed against the inner wall of the housing 1 without falling out of the housing 1. In a similar way, when pressing end cap 3, through output medicine 7, also can make end cap 3 radial expansion, crowd on 1 inner wall of tube to the assurance can not deviate from in tube 1. The reinforcing cap can also be fixed at the joint of the reinforcing cap and the outer end face of the pipe shell by glue or paint in an auxiliary way. After the fuse is filled, the reinforcing cap 2, the gasket 8 and the bottom cap 3 can not fall off under the constraint of a fuse structural member.

When the bottom cap is used for a fire cap, the bottom cap 3 and the bottom charging structure (the joint of the bottom surface of the output medicine 7 and the inner wall surface of the bottom cap 3) are flat-bottom structures.

The charging size error is accumulated at the output end of the fire cap, and the output power of the fire cap is not influenced. And the washer at the output end of the fire cap has a central hole, so that the flame output of the fire cap is not influenced. And the gasket at the output end of the fire cap is flush or basically flush with the end surface of the tube shell, so that the fire cap charging structure can not be damaged by loose displacement under the impact overload action of launching, falling and the like.

Example 2

With reference to fig. 3, the long delay needle-punched blasting element for fuzes with flush input end surfaces, which is used as a detonator, comprises a cylindrical tube shell 1, and a reinforcing cap 2, a needle-punched powder 4, a first delay powder 5, a second delay powder 6, an output powder 7, a bottom cap 3 and a plurality of gaskets 8 which are coaxially arranged in the tube shell 1; the acupuncture medicine 4, the first delay powder 5, the second delay powder 6 and the output powder 7 (initiating powder or initiating powder and high explosive) are sequentially arranged from front to back, the reinforcing cap 2 serves as an input end, the top surface of the reinforcing cap 2 is flush with the top surface of the tube shell 1, the center of the input end is thinned, acupuncture excitation is facilitated, the front ends of all the acupuncture medicines 4 and the first delay powder 5 are filled in the reinforcing cap 2, the bottom ends of all the output powder 7 and the second delay powder 6 are filled in the bottom cap 3, a plurality of gaskets 8 are stacked in a vacant position between the bottom surface of the bottom cap 3 and the end surface of the output end of the tube shell 1, and the bottom surface of the gasket 8 located at the lowest position is flush with the end surface of the output end of the tube shell 1.

Furthermore, the number of the gaskets 8 is adjusted according to the vacant space between the bottom surface of the bottom cap 3 and the end surface of the output end of the tube shell 1, and the last vacant space is filled by sealing paint or sealant. The thickness of the gasket 8 is not completely the same and is divided into thick and thin, so that the gasket is beneficial to filling the depth of a vacant position finely and realizing the leveling.

The

delay agents

5 and 6 are pressed by the needle 4, which causes the reinforcement cap 2 to expand radially and to bear against the inner wall of the housing 1 without falling out of the housing 1. In a similar way, when pressing end cap 3, through output medicine 7, also can make end cap 3 radial expansion, crowd on 1 inner wall of tube to the assurance can not deviate from in tube 1. The reinforcing cap can be fixed at the joint of the reinforcing cap and the outer end face of the tube shell by auxiliary glue or paint. After the fuse is filled, the reinforcing cap 2, the gasket 8 and the bottom cap 3 can not fall off under the constraint of a fuse structural member.

When the bottom cap is used for a detonator, the bottom cap 3 and the bottom charging structure (the joint of the bottom surface of the output powder 7 and the inner wall surface of the bottom cap 3) are in energy-gathering pit structures.

The charging size error is accumulated at the output end of the detonator adopting the energy-gathering nest structure, and the output power of the detonator cannot be obviously influenced. And the gasket at the output end of the detonator has a central hole, so that the jet flow output of the detonator is not influenced. And the output end gasket of the detonator is flush or basically flush with the end surface of the tube shell, so that the detonator charging structure can not be subjected to loose type displacement damage under the impact overload action of launching, falling and the like.

The difficulty of the invention is that the traditional cognition always emphasizes the axial position size precision of the output end of the explosion element without distinction. In fact, the firing reliability of the needle input end of the needle-punched explosive element is closely related to the design of the needle-punched firing mechanism of the matched fuse, which relates to the two specialties of the fuse and the initiating explosive device, so that the firing reliability is not easy to be imagined. In addition, the firing end of the firing pin is assembled firstly and then the output end is assembled during manufacturing, so that the safety is improved instead of being reduced (only the acupuncture medicine is not provided with high explosive when the acupuncture medicine is assembled and pressed, and the intrinsic safety is realized due to small power), which is not easy to conjecture.

In addition, there are some difficulties and constraints in improvement, such as not increasing the cost significantly, not decreasing the reliability, not increasing the overall size, and having higher production efficiency and quality assurance.

Claims

1. A long-delay needle-punched explosive element for a fuse with flush input end face is characterized in that: comprises a cylindrical tube shell (1), and a reinforcing cap (2), a puncture medicine (4), a first delay medicine (5), a second delay medicine (6), an output medicine (7), a bottom cap (3) and a plurality of gaskets (8) which are coaxially arranged in the tube shell (1); set gradually acupuncture medicine (4) from front to back, first delay medicine (5), second delay medicine (6), output medicine (7), strengthen cap (2) as the input, the top surface of strengthening cap (2) flushes with the top surface of tube (1), the processing of making thin is done at the input center, be convenient for acupuncture excitation, the front end of whole acupuncture medicine (4) and first delay medicine (5) is filled in strengthening cap (2), the bottom of whole output medicine (7) and second delay medicine (6) is filled in end cap (3), the vacancy between the bottom surface of end cap (3) and tube (1) output terminal surface stacks a plurality of packing rings (8), packing ring (8) bottom surface that is located the bottom flushes with the output terminal surface of tube (1).

2. A long delay needle blast element for fuzes with flush input face as claimed in claim 1, wherein: the number of the gaskets (8) is adjusted according to the vacant space between the bottom surface of the bottom cap (3) and the end surface of the output end of the tube shell (1), and the last vacant space is filled by sealing paint or sealant.

3. A long delay needle blast element for fuzes with flush input end face according to claim 1 or 2, characterized in that: the thickness of the gasket (8) is not exactly the same.

4. A long delay needle blast element for fuzes with flush input end face according to claim 1, characterized in that: when the bottom charging structure is used for a fire cap, the bottom cap (3) and the bottom charging structure are flat-bottom structures.

5. A long delay needle blast element for fuzes with flush input end face according to claim 1, characterized in that: when the detonator is used for a detonator, the bottom cap (3) and the bottom charging structure are of energy-gathering pit structures.