CZ286402B6 - Delaying element of non-electric igniting detonator - 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

Technical field

The invention relates to a delay element of a non-electric detonator activated by a heat pulse of a detonation tube with an amount of explosive charge of less than 0.2 g / m, in which a detonation wave is guided after initiation by a shock wave, e.g. s, formed by explosive decomposition of the explosive layer on the inner surface of the detonation tube.

BACKGROUND OF THE INVENTION

The non-electric ignition detonator delay element, consisting of 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 delay composition in the housing The delay time is realized directly or through a structural element that intensifies the thermal ignition of the detonation tube. Such a design 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 9000 ms is achieved with a solution that uses a delay element consisting of a delay housing, delay assembly and primary charge, and is further equipped with an explosive charge hatch. Such a delay element is worked into a known design of a non-electric spark detonator formed of a metal sleeve and a secondary charge.

Overview of the drawings

In the accompanying drawing, a delay element is shown in cross-section.

DETAILED DESCRIPTION OF THE INVENTION

The delay element of the non-electric spark detonator is formed by a delay housing 3 which is filled with a delay composition 4, a primary charge 5 and provided with a cap 6 with an explosive charge 7 preferably a mixture of 20 to 80 parts zirconium, 80 to 20 parts iron oxide, 0.5 to 5 parts of a fluoroelastomer, and is worked into a non-electric detonator with a metal tube 1 and a secondary charge 2.

The timing accuracy, expressed as a statistical standard deviation in the range from 500 to 9000 ms, is as follows:

-1 CZ 286402 B6

Nominal value (ms) Standard Deviation (ms) Nominal value (ms) Standard Deviation (ms) 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 ms to 9000 ms with a 500 ms step. Advantageously, the high timing accuracy of the detonator provided with a delay element designed according to the invention can be utilized.

Claims (1)

PATENT CLAIMS A delay element of a non-electric spark detonator comprising a delay housing (3), a delay composition (4) and a primary charge (5), worked in a metal tube (1) with a secondary charge (2), characterized in that the housing (3) The detector is equipped with a hatch (6) and an explosive charge (7).