Detonator
Detonators are metal capsules that contain a small amount of initial explosive . They are used to safely detonate explosives. If a detonator is connected to an explosive charge, one speaks of a blow charge or cartridge .
construction
Small amounts of explosive explosives are used as cargo, which can be detonated by a low thermal or mechanical load . A two-stage charge consists, for example, of a primary charge ( lead azide or earlier fatal mercury ) and a secondary charge made of tetryl or nitropenta .
The detonation of the main charge is caused by the pressure wave that is created when the initial explosive detonates in the detonator. For non-sensitive explosives, such as ANC explosives , a booster charge made of more sensitive explosives is often used to safely detonate the main charge.
Detonator
Detonators are detonators with an integrated electric detonator.
use
Earlier detonators and electrically ignitable were firing moment detonators supplied separately and clipped together before use. Today, largely industrially manufactured detonators have prevailed and detonators are only used in a few cases, such as for blasting ice or snow fields or in the military. Here they are strangled to the fuse with a strangler in order to detonate thrown charges .
literature
- Author collective: The blasting party . in mining and in the stone and earth industry. Ed .: SDAG Wismut. 3. Edition. German publishing house for basic industry, Leipzig 1977, p. 39-47 .
- Karl Heinz Ossendorf: From the detonator to the modern detonator (= “Dynamit Nobel” magazine . No. 5 + 6 ). Troisdorf 1986 ( [1] [PDF; accessed on May 25, 2018]).
- Walter Zanoskar: Gallery and tunnel construction: An introduction to the practice of modern rock hollow construction . 2nd Edition. Springer, 1964, ISBN 978-3-7091-8116-4 , pp. 51 ff . ( Limited preview in Google Book Search [accessed May 25, 2018]).
Web links
- Explosives for fire fighting (accessed April 24, 2020)
- Technical rule on explosives law Blasting work (accessed April 24, 2020)
- Shaped charge with directed explosive effect (accessed April 24, 2020)
- Ordinance of January 27, 1971 on the prevention of accidents during blasting work (accessed on April 24, 2020)