CN109682269B

CN109682269B - Simple method for detecting metal flying piece in detonator explosion

Info

Publication number: CN109682269B
Application number: CN201910104271.4A
Authority: CN
Inventors: 孔祥雷
Original assignee: Liaoning Institute of Science and Technology
Current assignee: Liaoning Institute of Science and Technology
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2021-02-26
Anticipated expiration: 2039-02-01
Also published as: CN109682269A

Abstract

A simple method for detecting metal flying pieces in detonator explosion. The method is characterized in that a large number of metal flying sheets generated in the axial direction and the radial direction during detonator explosion are captured by using target paper, and the method mainly comprises the following steps: selecting a hard platform, horizontally placing an aluminum plate, a plastic foam plate and axial target paper from bottom to top in sequence, rolling white paper into a paper tube with the diameter of 28cm and the height of 40cm to be used as radial target paper, rolling a rubber plate with the thickness of 3mm into a tube with the inner diameter of 28cm and the height of 40cm, attaching and fixing the radial target paper on the inner wall of the rubber tube, placing the rubber tube on the axial target paper in the middle, penetrating a leg wire of a detonator to be detected out of a small hole in the center of the upper part of an explosion-proof iron box, adjusting and fixing the detonator, placing the explosion-proof iron box on the aluminum plate in the middle, covering a layer of cotton quilt on the explosion-proof iron box for protection, starting video recording and shooting, detonating the detonator, recovering the target paper and numbering, and recording the field condition in detail. The method for detecting the detonator energy-gathered jet flow and the metal flying piece is safe, reliable, simple and feasible, and low in cost, and is an effective new method.

Description

Simple method for detecting metal flying piece in detonator explosion

Technical Field

The invention is used for detecting the metal flying piece after the explosion of the detonator in the field of engineering explosion.

Background

As is known, the explosion of the detonator can be completed only in dozens of microseconds, a large amount of metal fragments flying at a high speed of thousands of meters per second are generated after explosion, and the metal fragments have great destructive power and killing power due to small volume, large quantity, high speed, sharp edge and long flying distance, so that the explosion process is difficult to observe by a common method. The most advanced high-speed photography method at present can only capture the light effect process when the detonator explodes. The common pulse electrical testing method using signal on-off can only test the speed of individual metal flying pieces. In addition, the equipment required by the method is high in price, and most of researchers and technicians cannot meet the requirements at all. At present, no effective detection means exists for the scattering process of a large amount of high-speed metal fragments generated after the explosion of the detonator.

Disclosure of Invention

In order to solve the technical problem that the flying process of a large amount of high-speed metal fragments generated after the explosion of the detonator cannot be detected at present, the invention provides a new method which can effectively capture a large amount of metal flying fragments generated by the explosion of the detonator, is safe, reliable, simple and feasible, has low cost and can be mastered by the vast technical staff.

The technical scheme of the invention is as follows: the metal flying sheets mainly have two directions after the detonator explodes, one is the direction of the energy-gathering holes at the head of the detonator and is called as the axial direction, and the other is vertical to the axial direction and is called as the radial direction; the metal flying sheet can leave perforation marks when passing through the white paper, and the fragments with different sizes, shapes, speeds and directions have different conditions of the perforation sizes, shapes, notch advantages, distribution ranges and the like. Therefore, the white paper is used as the target paper, the axial target paper in the front of the detonator is used for capturing a large amount of metal fins generated in the axial direction during the explosion of the detonator, and the radial target paper on the side surface is used for capturing a large amount of metal fins generated in the radial direction during the explosion of the detonator. The method comprises the following specific steps: selecting a hard platform, and horizontally placing an aluminum plate, a plastic foam plate and axial target paper from bottom to top in sequence; rolling a piece of white paper into a paper cylinder with the diameter of 28cm and the height of 40cm as radial target paper, drawing a horizontal circle along the target paper wall at the height of 25cm by using a marking pen, rolling a rubber plate with the thickness of 3mm into a cylinder with the inner diameter of 28cm and the height of 40cm, and attaching and fixing the radial target paper on the inner wall of the rubber cylinder; thirdly, placing the rubber barrel on the axial target paper in the middle, drawing a circle on the axial target paper along the inner side of the barrel bottom by using a marking pen, and finishing the placement of the target paper; fourthly, enabling the leg wire of the detonator to be detected to penetrate out of a small hole in the center of the upper part of the explosion-proof iron box, adjusting the head of the detonator to enable the head of the detonator to be located at the height of 25cm of the target paper, and fixing the detonator; placing the explosion-proof iron box on an aluminum plate in the middle, wherein the detonator is positioned at the height of 25cm from the center of the radial target paper; sixthly, covering a layer of cotton quilt on the explosion-proof iron box for protection, starting video recording and shooting, and detonating the detonator; removing the explosion-proof box, recycling and numbering target paper, recording the field condition in detail, and storing relevant field materials; eighthly, analyzing the quantity, size, shape and distribution of the energy-gathering jet flow and the metal flying piece which are left on the target paper after the detonator explodes.

The method has the advantages of being capable of detecting the size, shape, distribution range and other conditions of the metal fragments flying at high speed generated after the detonator explodes, safe, reliable, simple, feasible and low in cost, and being an effective means for researching the metal fragment rule of the detonator explosion.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the structure of a detection target paper.

Fig. 2 is a schematic view of an explosion-proof iron box.

In the figure, 1, axial target paper, 2, a plastic foam plate, 3, an aluminum plate, 4, radial target paper, 5, a rubber cylinder and 6, small holes are arranged.

Detailed Description

Firstly, selecting a hard platform, and horizontally arranging an aluminum plate (3), a plastic foam plate (2) and axial target paper (1) from bottom to top in sequence; then rolling a piece of white paper into radial target paper (4) with the diameter of 28cm and the height of 40cm, drawing a horizontal circle along the target paper wall by using a marking pen at the height of 25cm, rolling a rubber plate with the thickness of 3mm into a rubber cylinder (5) with the inner diameter of 28cm and the height of 40cm, attaching and fixing the radial target paper (4) on the inner wall of the rubber cylinder (5), and then placing the rubber cylinder (5) on the axial target paper (1) in the middle; drawing a circle on the axial target paper (1) along the inner side of the bottom of the rubber cylinder (5) by using a marking pen; enabling the leg wire of the detonator to be detected to penetrate out of a small hole (6) in the center of the upper part of the explosion-proof iron box, adjusting the head of the detonator to enable the head of the detonator to be located at the height of 25cm of the target paper, and fixing the detonator; placing the explosion-proof iron box on the aluminum plate (3) in the middle, wherein the detonator is arranged at the height of 25cm from the center of the paper tube; covering a layer of cotton quilt on an explosion-proof iron box for protection, starting video recording and shooting, and detonating a detonator; finally, removing the explosion-proof box, recycling the target paper, numbering, recording the field condition in detail, and storing the field related materials; and analyzing the quantity, size, shape and distribution of the energy-gathered jet flow and the perforations of the metal flying sheets left on the target paper after the detonator explodes.

According to the method, the single detonator with the protective cap, the single detonator bound with the detonating tube and the high-speed metal flyer generated by the single detonator with the protective cap and the detonating tube bound are respectively tested, the change rule of the high-speed metal flyer generated after the detonator explodes along with the external conditions is obtained according to the change conditions of the number, the distribution range, the size, the shape and the like of the through holes left on the target paper by the metal flyer under different working conditions through comparative analysis, and effective measures for protecting the detonator explosion energy-gathering jet and the metal flyer are provided according to the change rule.

Claims

1. A simple method for detecting metal flying pieces in detonator explosion utilizes axial target paper in front of the detonator to capture a large amount of metal flying pieces axially generated in the detonator explosion process and utilizes lateral radial target paper to capture a large amount of metal flying pieces radially generated in the detonator explosion process, and is characterized by comprising the following steps:

selecting a hard platform, and horizontally placing an aluminum plate, a plastic foam plate and axial target paper from bottom to top in sequence;

rolling a piece of white paper into a paper cylinder with the diameter of 28cm and the height of 40cm as radial target paper, drawing a horizontal circle along the target paper wall at the height of 25cm by using a marking pen, rolling a rubber plate with the thickness of 3mm into a cylinder with the inner diameter of 28cm and the height of 40cm, and attaching and fixing the radial target paper on the inner wall of the rubber cylinder;

thirdly, placing the rubber cylinder on the axial target paper in the middle, drawing a circle on the axial target paper along the inner side of the cylinder bottom by using a marking pen, and finishing the placement of the target paper;

fourthly, enabling the leg wire of the detonator to be detected to penetrate out of a small hole in the center of the upper part of the explosion-proof iron box, adjusting the head of the detonator to enable the head of the detonator to be located at the height of 25cm of the target paper, and fixing the detonator;

placing the explosion-proof iron box on an aluminum plate in the middle, wherein the detonator is positioned at the height of 25cm from the center of the radial target paper;

sixthly, covering a layer of cotton quilt on the explosion-proof iron box for protection, starting video recording and shooting, and detonating the detonator;

removing the explosion-proof iron box, recycling and numbering target paper, recording the field condition in detail, and storing relevant field materials;

eighthly, analyzing the quantity, size, shape and distribution of the energy-gathering jet flow and the metal flying piece which are left on the target paper after the detonator explodes.