Water-resistant type long-second delay electric detonator and manufacturing method thereof

Abstract

The invention discloses a water-resistant type long-second delay electric detonator and a manufacturing method of the water-resistant type long-second delay electric detonator, and aims to provide a novel electric detonator with excellent water resistance and wide application scope. The electric detonator comprises a detonator shell, an initiating explosive, a lead core inner tube type delay body, an electric firing element, a tight-opening plug and a leg wire. By adopting the lead core inner tube type delay body structure as the delay center element of the water-resistant type long-second delay electric detonator, the appearance of the electric detonator is basically equivalent to that of a common delay water-resistant type long-second delay electric detonator, the water-resistant type long-second delay electric detonator has the following significant characteristics that a sealed plastic tube is arranged on the tight-opening plug of the detonator. The space in the detonator body is absolutely isolated from an environment space, the water resistance is guaranteed effectively, the detonator has preferable water resistance. In a using process, in a combustion process of the inner part of the electric detonator, the generated gas increases the pressure in a gas chamber, the hot gas enables the sealing plastic tube to soften and expand, the pressure in the gas chamber can be effectively balanced and reduced, and the stable combustion of the delay explosive core is realized.

Description

technical field [0001] The invention relates to the field of pyrochemical industry, in particular to the field of water-resistant delayed electric detonator, in particular to a water-resistant long-second delay electric detonator and a preparation method thereof. Background technique [0002] The research and development of water-resistant long-second delay electric detonators is a bottleneck and difficulty in the field of civilian detonators. This type of electric detonator has defects such as complex product structure and assembly process, poor water resistance, and unstable delay time (burning rate). Currently, the industry mainly adopts the following three structures. [0003] The first is the delay cable structure, which uses the delay cable section as the delay core element of the long-second delay electric detonator, and controls the length of the delay time by determining the size of the delay cable section. However, this structure has the following disadvantages: 1...

AI Technical Summary

Problems solved by technology

However, this structure has the following disadvantages: 1) Complex structure and assembly process; 2) Poor ignition reliability; 3) Poor water resistance

However, this structure also has the following disadvantages: 1) Due to the long shell of the detonator, the processing cost is high and the market competitiveness is weak; 2) The delay time (burning rate) is unstable, resulting in poor performance stability of the product ;3) The basic detonator is difficult to assemble, the processing technology is relatively complicated, and the processing is difficult

However, it also has the problem of insufficient water resistance, and its application conditions are limited.

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