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Modular smokeless firework emission ammunition with multi-hierarchy hole structure and preparation method for modular smokeless firework emission ammunition

A modular, propellant technology, applied in explosives, alkali metal compositions, etc., can solve the problems of high stability or poor consistency of fireworks products, affecting the discharge effect of fireworks products, and large residual moisture or solvent, etc. Achieve the effect of improving energy utilization, increasing initial combustion area, and reducing the amount of charge

Active Publication Date: 2012-07-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the granular microporous propellant is prepared into a modular propellant, the propagation of the combustion flame is first carried out on the surface of the propellant grain, and the gradual increase in the combustion process of the grain is not high enough. The energy utilization rate of traditional Chinese medicine blocks needs to be improved, and the stability or consistency of the launch height of finished fireworks is not good enough
In addition, when the diameter of the grain is large, the time required for drying is longer, and the residual moisture or solvent in the center of the grain is large, which may lead to poor combustion performance of the grain, and ultimately affect the discharge effect of fireworks products.

Method used

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  • Modular smokeless firework emission ammunition with multi-hierarchy hole structure and preparation method for modular smokeless firework emission ammunition
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  • Modular smokeless firework emission ammunition with multi-hierarchy hole structure and preparation method for modular smokeless firework emission ammunition

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preparation example Construction

[0016] A method for preparing a modular smokeless fireworks propellant with a multi-level hole structure, comprising the following steps:

[0017] Step 1, preparing granular micro-pore fireworks medicine;

[0018] Step 2, mix the solution or sol of the above-mentioned granular micropore fireworks medicine, ignition performance enhancer and organic binder, and then prepare the mixed material into a block solid with fire transmission hole 1 by molding. After drying, a modular smokeless fireworks propellant with a multi-level hole structure is obtained. The mass percentages of the granular micropore firework medicine, the ignition performance enhancer and the organic binder are: 82%-99% of the granular micropore firework medicine, 0-10% of the ignition performance enhancer, and 0-10% of the organic binder 0.2-10%. The organic binder is one or more of water-soluble binders, starch, modified starch, nitrocellulose, polyvinyl butyral, ethyl cellulose, cellulose acetate, and cellul...

Embodiment 1

[0024] Granular microporous fireworks were prepared from single-base waste gunpowder containing 97.0% of nitrocellulose and 1.0% of diphenylamine (stabilizer). The single-base waste powder is preliminarily crushed in the presence of a large amount of water, and the particle diameter is controlled to be no more than 3mm. The single-base waste powder with water is added to the forming reactor, and the moisture content of the wet single-base waste powder is 15%. -30%, add ethyl acetate solvent 10 times the mass of single-base waste propellant powder under stirring, stir and dissolve at 45°C-60°C for 30-60min, and then continuously add water to the material system in the forming reactor Carry out the emulsification and foaming operation under the stirring state, continue to add water in this step, the quality of the added water is 6 times of the mass of the single-base spent powder. Then, continue to stir at 50-60°C for 30min to 60min, and when the temperature of the material in t...

Embodiment 2

[0029] Using 90.0% nitrocellulose, 8% nitroglycerin, and 1.0% double-base smokeless powder as a raw material to prepare granular micro-pore fireworks medicine, the double-base smokeless powder raw materials are first added to the forming reactor, Add ethyl acetate solvent 10 times the mass of the raw material under stirring, stir and dissolve at 45°C-60°C for 30-60min, then continuously add 2.0% potassium nitrate aqueous solution to the material system of the forming reactor; Carry out the emulsification and foaming operation under the following conditions. In this step, continue to add 2.0% potassium nitrate aqueous solution. The quality of the added potassium nitrate aqueous solution is 6 times the quality of the double-base type smokeless propellant raw material, and then continue to stir at a temperature of 50-60°C for 30min. ~60min, when the temperature of the system is adjusted to 65°C-68°C, add 6 times the mass of the raw material containing 0.5% gelatin dispersant and 2...

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Abstract

The invention discloses a modular smokeless firework emission ammunition with a multi-hierarchy hole structure. The modular smokeless firework emission ammunition comprises nitrocotton which contains a large number of tiny holes and has a cylinder appearance; a fire transmission hole is formed in a cylinder ammunition block along an axial direction of the cylinder; and the size and the number of the fire transmission hole are determined according to an aperture of an emission tube. A preparation method for the modular smokeless firework emission ammunition comprises the following steps of: mixing granular micro-hole firework ammunitions and an adhesive; forming by using a die with a die needle according to a die-pressing method; and drying to obtain the modular smokeless firework emission ammunition with the multi-hierarchy hole structure. Compared with the modular emission ammunition without any fire transmission hole, the modular smokeless firework emission ammunition has the advantages that: the initial combustion area is increased, the combustion time of the emission ammunition is shortened, and the stability and the consistency of the emission ammunition of a firework product are relatively high. Furthermore, the modular emission ammunition has a relatively remarkable gradually-increased combustion characteristic, so that the energy utilization rate of the firework emission ammunition can be increased remarkably.

Description

technical field [0001] The invention belongs to the fireworks propellant technology, in particular to a modular smokeless fireworks propellant with a multi-level hole structure. Background technique [0002] Black powder is a traditional fireworks propellant that has been used for hundreds of years. Due to the large amount of smoke and polluting gases produced during the fireworks display, research on environmentally friendly fireworks with less smoke has attracted attention in recent years. The pyrotechnic powder is a microporous propellant with a microporous structure obtained through a spheroidization process as a raw material, and a modular smokeless fireworks propellant is made by further bonding and molding methods, because its apparent burning speed can be in a wide range It can be adjusted to achieve better launch effects on most fireworks varieties, and the comprehensive performance reaches or exceeds the level of black powder. However, after the granular microporo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B29/20C06B31/22C06B31/26
Inventor 蔺向阳潘仁明李生有
Owner NANJING UNIV OF SCI & TECH
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