Combustion type deferred blasting cap and deferred elements thereof

Abstract

The invention pertains to the technical field of priming material and particularly relates to a combustion-type delay primer detonator and a delay component; the detonator comprises a delay electric / non-electric detonator with / without initiating explosive; a delay tube with an outer diameter of 1.0mm to 3.0mm is wound in a helical spring shape or repeatedly folded into a cylindrical delay component, with the outer diameter loose fitting and mechanically fixed with the inner diameter of the shell or an inner cap of the detonator; the two ends of the delay tube are respectively located in the center of the helical spring shape or cylindrical body and provided with a protrusion section with a length of 1.0 to 5.0 mm; the protrusion section at one end is at a distance equal to or less than 5mm from the igniting hole in the detonator or directly touches the surface of the initiating explosive, and the protrusion section at the other end is at a distance of 4.0 mm to 10.0 mm from the nozzleof the detonator or the electric fusehead; or a delay tube with an outer diameter of 1.4mm to 1.5mm is inserted into the cavity of the detonating tube; one end of the delay tube is parallel to the nozzle of the detonating tube and at a distance equal to or less than 5mm from the initiating explosive in the detonator or the surface of the initiating explosive; the other end of the delay tube is inthe detonating tube and the nozzle thereof touches the booster explosive on the inner wall of the detonating tube. The invention can realize a correct long-term delay without expending the length of the detonator and can improve the quality of the relay detonator.

Description

technical field [0001] The invention belongs to the technical field of detonating materials, and in particular relates to a combustion-type detonation delay detonator and a delay element used therein. Background technique: [0002] With the continuous development of science and technology, people put forward higher requirements for the extension length and accuracy of detonation time. At present, the more mature detonator detonation delay technology is the lead core drawing technology: the thick lead tube material with the delay drug is drawn through multiple drawing processes to become a lead that can be loosely matched between its outer diameter and the inner diameter of the detonator (usually about 7mm). Tube (usually in the range of 5.5mm ~ 6.5mm), then cut into a suitable length according to the length of the delay time is the delay element, and then put it into the detonator. This technology requires that the outer diameter of the lead tube after drawing is loosely ma...

AI Technical Summary

Problems solved by technology

However, from the actual use situation, the ignition ability and stability of the slow-burning delay agent are not reliable enough, and quality problems such as fire failure and delay jump often occur, which brings inconvenience to production management and even brings safety hazards.

[0004] At present, there are reports of using microelectronics technology to develop digital detonators in some foreign projects, but the cost is high, the price is expensive, and the use is limited.

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