Cylindrical Granular Explosives Screening Method

A granular and cylindrical technology, which is applied in the field of pyrotechnic drug screening, can solve problems such as the difficulty of screening cylindrical drug particles, and achieve the effects of improving maintenance efficiency, wide material sources, and improved operability.

Active Publication Date: 2022-04-08
陕西庆华汽车安全系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method for screening cylindrical granular pyrotechnics, which solves the problem of difficult screening of cylindrical drug particles with specific length-to-diameter ratio requirements in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1, complete manual sieving operation of elongated cylindrical drug granules

[0056] A pyrotechnic agent with a diameter of 1.0mm and an aspect ratio of about 3:1. It is thin cylindrical in appearance and hard in quality.

[0057] Choose a standard sieve with a mesh size of 1.80mm to sieve long medicine particles, choose a standard sieve with a mesh size of 1.60mm as an intermediate sieve, and choose a standard sieve with a mesh size of 0.90mm to sieve powder. Before work, confirm that the specifications of the three sieves are correct, and the mesh surface is complete without deformation, and place them in order of use.

[0058] The first step is to place the 1.80mm standard sieve horizontally, and use special tools to hold the medicine particles. The medicine particles are evenly spread on the mesh surface in a line or fan shape. When spreading the material, the movement is gentle, and avoid bumping the screen frame or mesh surface. Then, hold the sieve wi...

Embodiment 2

[0062] Embodiment 2, whole process mechanized screening of slender cylindrical medicine granules

[0063] A pyrotechnic agent with a diameter of 1.0mm and a length-diameter ratio of about 3:1. It has a thin cylindrical appearance and is hard in quality. The standard screen mesh specifications are 1.80mm, 1.60mm, and 0.90mm in turn.

[0064] The first step is to use an explosion-proof circular swinging screen to pre-adjust the equipment base so that the angle between the base and the horizontal plane is kept at 0° to 1°. From low to high, install 0.90㎜, 1.60㎜, 1.80㎜ standard sieves in sequence, of which 1.80㎜ or 1.60㎜ standard sieves can have 1 or 2 respectively, and the total height of all standard sieves after installation is based on the principle of being suitable for feeding operations. Install and fasten the screens of each layer so that the screen surface of the standard screen is basically in a horizontal state, and ensure that the angle between the screen surface of th...

Embodiment 3

[0066] Embodiment 3, change over to mechanized screening operation immediately after pelletizing

[0067] A pyrotechnic agent with a diameter of 2.5mm and a length-to-diameter ratio of about 1:1. It is cylindrical in appearance, slightly soft and slightly elastic, and the powder is much smaller than the minimum size.

[0068] Through mechanisms such as conveyor belts, the pelletizing and screening operations are connected in series. After granulation, the drug particles pass through the conveyor belt, slideway, etc., and the drug particles are introduced into the screen for separating long drug particles. The standard sieve is a rectangular, multi-layer screen structure, with three sides as a frame and one opening. From top to bottom, there are two layers of 3.55mm screens, one layer of 3.15mm screens to separate long drug particles, and one layer of 2.00mm screens. to separate the powder. Among them, the length of the 2.00mm standard sieve is about 1 / 2 to 2 / 3 of the length ...

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PUM

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Abstract

The invention discloses a method for screening cylindrical granular pyrotechnics, which is suitable for pyrotechnics pellets obtained through extrusion and pelletizing processes. The specific steps are as follows: step 1, confirming the morphological characteristics of the pellets; step 2 1. Select the appropriate screen and mesh size; Step 3, separate the long medicine particles; Step 4, separate the powder and complete the screening. The screen frame is made of stainless steel or high-strength aluminum alloy to reduce the weight of the equipment and improve operability. Choose metal wire plain weave square hole mesh, the percentage of mesh surface screening area is relatively high, at the same time, the contact area between medicine particles and mesh surface is small, the working resistance is small, easy to sieve, and the material source is wide and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of pyrotechnic drug screening and relates to a method for screening cylindrical granular pyrotechnic drugs. Background technique [0002] In the passive safety protection mechanism of automobiles, the gas generator needs to complete the predetermined function by means of the combustion of pyrotechnic agents, which requires that such special pyrotechnic agents must have specific combustion characteristics, and the combustion characteristics are closely related to their external dimensions. relation. Therefore, how to ensure the consistency of the external dimensions of the pharmaceutical particles is particularly important. In addition, in order to meet the assembly requirements, it is a basic requirement for the pharmaceutical particles to have good fluidity, and this requirement is also closely related to the external dimensions. [0003] The pyrotechnic agent involved in the present invention is generally...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07B1/28B07B1/46
CPCB07B1/30B07B1/46
Inventor 王森李永锋贾金伟张康熙朱林贾高峰柳斌刘行行张宏臣魏庆华苏小亮
Owner 陕西庆华汽车安全系统有限公司
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