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Low-energy flexible detonating cord

A flexible detonating cord, low-energy technology, applied in the directions of detonating cords, nitrated pentaerythritol compositions, etc., can solve the problem of large lateral detonation capability, interruption of propagation, affecting the reliability of the connection between the main line of the detonating cord and the side branch lines, etc. problems, to achieve the effect of reducing overall material consumption and reducing production costs

Pending Publication Date: 2020-05-12
陕西渭南庆华化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used as an equipment for medium and deep hole blasting, due to the large lateral detonation capacity, it cannot meet the blasting effect achieved by reverse detonation at the bottom of the hole, which reduces the utilization rate of explosives.
In addition, ordinary detonating cords generally use pure polyethylene plastic as the outer coating layer, and pure polyethylene plastics are hardened under high-cold climate conditions, resulting in a decrease in the bending performance of the detonating cord, which affects the main line of the detonating cord in engineering blasting. The reliability of the connection with the side branch line is easy to cause the transmission to be interrupted due to the phenomenon of loosening in engineering blasting

Method used

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  • Low-energy flexible detonating cord
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Examples

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Effect test

Embodiment 1

[0014] Example 1, the mass fraction of 85% ultra-fine Taian explosives with a particle size passing through a 30 mesh silk sieve flows to the center of the charging mold under the action of gravity, and flows into the inner mold evenly under the pulling of 4 core wires. In the injection hole, at the same time, under the constraint of the outer mold, the polyester film is curled from a strip into a trumpet shape, wrapping the explosives flowing out of the inner mold, ensuring that the amount of wrapped explosives is even in the film, thus forming explosives. drug core. On the surface of the explosive core wrapped by polyester film, the inner and outer layers of high-strength polyester filaments are reversely wound, so that the structure of the explosive core is evenly covered, and the explosive core is tightened and shaped to make the explosive core The packing density meets the design requirements to ensure that the detonating cord has a certain detonation performance and form...

Embodiment 2

[0015] Example 2, the mass fraction of 90% superfine Taian explosives with a particle size passing through a 30 mesh silk sieve flows to the center of the charging mold under the action of gravity, and flows into the inner mold evenly under the pulling of 3 core wires. In the injection hole, at the same time, under the constraint of the outer mold, the polyester film is curled from a strip into a trumpet shape, wrapping the explosives flowing out of the inner mold, ensuring that the amount of wrapped explosives is even in the film, thus forming explosives. drug core. On the surface of the explosive core wrapped by polyester film, the inner and outer layers of high-strength polyester filaments are reversely wound, so that the structure of the explosive core is evenly covered, and the explosive core is tightened and shaped to make the explosive core The packing density meets the design requirements to ensure that the detonating cord has a certain detonation performance and form ...

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Abstract

The invention discloses a low-energy flexible detonating cord which comprises a core wire. An explosive core is attached to the outer surface of the core wire; the outer surface of the explosive coreis wrapped with a polyester film; the outer surface of the polyester film is wound with two layers of polyester silk; and the outer surface of the polyester silk is coated with an outer coating. The low-energy flexible detonating cord releases less energy after blasting; according to the invention, surrounding blasting vibration is small, blasting noise is low, the blasting effect is good, the product flexibility is improved, the bending performance is improved, the overlapping effect of a main line and a side branch line in engineering blasting is improved, the propagation interruption phenomenon caused by untight overlapping in engineering blasting is reduced, and the construction reliability is improved.

Description

technical field [0001] The invention belongs to the field of blasting equipment, relates to the technical field of detonating cords, in particular to a low-energy flexible detonating cord. Background technique [0002] Detonating cord, also known as detonating wire, is a cable-like detonation-transmitting device that transmits detonation waves, and is used for detonating, detonating explosive charges, or using its explosive force to do work directly. The detonating cord is widely used as a detonating and propagating device in engineering blasting. The main component of the ordinary detonating cord core used in engineering blasting is Taian or Hesuojin, and its wire charge is not less than 10g / m , The diameter is generally around 5.0mm. When used as equipment for medium and deep hole blasting, due to the large lateral detonation capacity, it cannot meet the blasting effect achieved by reverse detonation at the bottom of the hole, which reduces the utilization rate of explosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06C5/04C06B25/32
CPCC06C5/04C06B25/32
Inventor 周波张保民张云飞夏晓荣
Owner 陕西渭南庆华化工有限公司
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