CZ281395A3 - Delay element of non-electrical blasting cap - Google Patents

Abstract

The invented delay element of a non-electric detonator is formed by a time delay device casing (3), a delay mixture (4) and a primary charge (5) and is encapsulated in a metal core (1) with secondary charge (2), whereby the casing (3) of the time delay device is provided with a cap (6) and an explosive charge (7).

Description

Delay element of non-electric spark detonator

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Round with dots

FIELD OF THE INVENTION The invention relates to a delay element of a non-electric detonator with an activated thermal pulse of a detonation tube and to an explosive charge of less than 0.2 g / m, in which the detonation wave is guided at 2000 m / a after shock. formed by explosive decomposition of the explosive layer on the inner surface of the detonation tube.

BACKGROUND OF THE INVENTION

The delay element of the non-electric ignition detonator, which is formed by a metal housing in which the pyrotechnic delay component is compacted, is required to have a high timing accuracy in the range of 0 ms to 9000 ms, the heat pulse transmission of the detonation tube required to ignite The housing of the retarder is realized directly or through a structural element that intensifies the thermal ignition of the detonation tube. Such a construction has disadvantages predominantly in the timing range from 6000 ms to 9000 ms, where it is not possible to provide a timing requirement with an interval of 500 ms.

SUMMARY OF THE INVENTION

Very accurate timing with a regular step of 500 ms from 0 ms to 9,000 ms is achieved with a solution that uses a delay element that is equipped with a hatch with an explosive charge and forms a separate unit. Such a delay element is worked into a known design of a non-electric ignition detonator.

Clarification of the drawing

The attached drawing shows a delay element, which has been burned into a non-electric detonator, consisting of a delay housing, a delayed assembly, a hatch and an explosive charge.

and

DETAILED DESCRIPTION OF THE INVENTION

The delay element of the non-electric ignition detonator is formed by a retarder housing which is filled with a delay composition 4, a primary charge and a flap 6 and an explosive charge 6, preferably a mixture of 20 to 80 parts zirconium, 80 to 20 parts iron oxide,

0.5 to 5 parts fluoroelastomer and is worked into a non-electric detonator with a metal tube 1, and a secondary charge

2.

Accuracy of timing of expression of statistically standard deviation-

in the area from 500 to 89 000 ms is as follows • • Nominal Direction tná Nominal Authoritative value deviation value deviation (ras) (»») (ras) ("S) 500 23-1 5000 55-1 1000 34.7 5500 44.7 1500 33-0 6000 53-0 2000 44.8 6500 54-8 2500 54.6 7000 57-9 3000 43-9 7500 41.2 3500 51-8 8000 55.5 4000 44.9 8500 60.0 4500 31.8 9000 67-8

Industrial applicability

The non-electric detonator delay element, provided with a hatch and explosive charge, can be used as a non-electric detonator design element to achieve regular ignition from the heat pulse of the detonation tube and achieve a delay of 0 me to 9000 ^{ms with 3} 500 ms step. the timing accuracy of the detonator provided with a delay element designed in accordance with the invention.

Claims (2)

PATENT CLAIMS Delay element of the non-electric ignition detonator, characterized in that the delay housing (3) is provided with a hatch (6) and an explosive charge (7) above. -AÍOíMíSVIa. 3 Η 4Λ fl 3 λi'i 5th ave ci OI ^ OQ 9 l li 8 9 • ť - 'Λ' χ'tS ~ Λ ί Ο! 3 ί 3 V7 \ -ί- / ·, η ί avy α 1) I-9 AND