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Method for producing detonating fuse or detonator delay line with small diameter and low charge linear density

A line density, small diameter technology, applied in the field of detonating cord or detonator extension line, can solve the problems of strong shock waves, large diameter, serious pollution, etc., to achieve the effect of ensuring product quality, heat generation control, and high production efficiency

Inactive Publication Date: 2009-10-14
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the making method of this detonating cord is not provided in this article
[0005] In 2008, CN101303218 (a combustion-type delayed detonation detonator and its delay element) introduced a detonator delay line technology (i.e. delay line), which solved the problems of large amount of lead and serious pollution in traditional delay body technology, but This article does not provide related technologies that can be adapted to the industrial production of delay lines
[0009] Although the detonating cord or detonator extension line with small diameter and low linear density charge has good practical value, and can solve the problems of strong shock waves caused by large diameter and high charge linear density, how can it be efficiently It is a difficult problem in the prior art to safely produce detonating cords or detonator extension lines with small diameters and low linear density charges

Method used

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  • Method for producing detonating fuse or detonator delay line with small diameter and low charge linear density
  • Method for producing detonating fuse or detonator delay line with small diameter and low charge linear density
  • Method for producing detonating fuse or detonator delay line with small diameter and low charge linear density

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Effect test

Embodiment 1

[0027] Embodiment 1 utilizes thermoplastic method charge

[0028] Firstly, according to the size (inner diameter, outer diameter) of the detonating cord of the designed small diameter and low linear density charge, the charge linear density, and the initial size of the tube body (inner diameter, outer diameter), use the formula ρ 1 = ρ 2 · D 1 2 - d 1 2 D 2 2 - d 2 2 ( g / m ) , The calculated initial charge linear density ρ 1 , combined with the initial length of the ...

Embodiment 2

[0030] Embodiment 2 Use linear continuous drawing equipment to make detonating cord with small diameter and low linear density charge

[0031] see figure 2 , the charged initial tube body 2 passes through two molds 6 and 8 in turn, so that its radial dimension changes from d of the initial tube body to d after passing through the mold 6 1 , becomes d after the second drawing of die 8 2 . Control the diameter and rotational speed of the pulling rollers 7 and 9, so that the linear velocity of the pipe body is within a reasonable range, so that the heat caused by deformation can be released quickly, so as to avoid adverse changes of explosives or delay charges inside the pipe body.

[0032] When aluminum pipes are used, the linear speed of the finished pipe body must be controlled within 85 m / min. Generally speaking, the linear velocity of the last pulling roller (ie the linear velocity of the finished pipe body) ranges from 8.0 to 85m / min. In actual production, the speed of...

Embodiment 3

[0034] Embodiment 3 Use the tower wheel type continuous drawing equipment to make the detonating cord or detonator extension line of small diameter and low linear density charge

[0035] In the actual production process, parameters such as the number of molds used in a single drawing and the elongation coefficient can be adjusted as needed. see image 3 , using 5 sets of molds to pull the detonating cord of the small diameter, low linear density charge from 8.0mm in diameter to 6.0mm in diameter. The size arrangement of the mold group 11 is: 8.0mm, 7.5mm, 7.0mm, 6.5mm, 6.0mm. Through processes such as head rolling and die piercing, the detonating cord with an outer diameter of 8.5mm or the initial pipe body of the delay line filled with explosives or delay charges is wound on two sets of tower wheels 10,12. Turn on the control equipment, the motor drives the tower wheel to rotate, and the tower wheel pulls the detonating cord or the extension line tube to pass through the 8....

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Abstract

The invention pertains to the technical field of explosive detonation and explosion propagation equipment and discloses a method for producing a detonating fuse or a detonator delay line with a small diameter and low charge linear density, which comprises the following steps: explosive is charged in an initial pipe body which is made from flexible metal and has wall thickness being one tenth to one third of the outer diameter of the pipe body; during the charge process, the charge linear density of the initial pipe body is calculated by the formula and then the explosive load is determined by a formula, namely M equals to rho1L1; during the continuous drawing process, the modular angle of a used mould is 7-35 degrees; the elongation coefficient of the pipe body in each drawing working procedure is controlled between 1.00 and 1.80; simultaneously, the linear speed of the drawn detonating fuse or the delay line pipe body is controlled within 85m per minute; and after the setting radial dimension is reached by drawing, suitable length is intercepted to obtain a finished product. The method realizes the continuous drawing production and can effectively and safely produce the detonating fuse or the detonator delay line with small diameter and low charge linear density. As the pipe body still has sufficient thickness after being drawn into a finished product, enough strength is ensured to restrict the internal explosive so that the explosive can form detonation and the product quality is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of explosive initiation and detonation transfer equipment, and in particular relates to a method for making a detonating cord or a detonator delay line for small-diameter, low-line-density charges. technical background [0002] Detonating cord is an essential detonating device in modern mining engineering and military industry. The detonating cord only plays the role of network connection and detonation transmission of group charge packs in use. Because the detonating cord is safe in use and reliable in transmission, it is widely used in important engineering and military ammunition. Ordinary detonating cord is made by wrapping explosives with cotton yarn. The diameter is generally 5.0-6.0mm, and the wire charge density is high (12-14g / m). The production process requires a lot of cotton yarn, high material cost and large charge. When the detonating cord network explodes, strong shock waves, noise and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42B33/00F42B33/02
Inventor 沈兆武马宏昊
Owner UNIV OF SCI & TECH OF CHINA
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