Research On The Principle And Application Of The High-safe Detonator

The detonator is the basic element of explosive detonation. The primary explosive is used in tradition detonator to make it exploded. Though it is reliable, the security is weak and much more accident happened because of the high sensibility of the primary explosive. Also there is serious environment pollution during the production of the primary explosive. Electronic detonator is seen as the substitute of the primary detonator with the advantage such as reliable ignition,precise delay time,good security, but it's too expensive to be used broad. The non-primary detonator doesn't use primary and costs less, it represents the direction of the detonator technology. The high-safe detonator is one kind of the detonators. It is ignited by the flyer of the excitation device. The high-safe detonator is reliale,sefe and precise. This article researching on the high-safe detonator concludes these contents: the exploding principle,selection of the excitation explosive,the velocity of the flyer made by the excitation device,the technology path and the improvement of the delay method.The main content of this thesis is:(1) To design the excitation device basing on the hot spot theory, including the configuration and selection of the excitation explosive. The excitation device consists of the hat,excitation explosive and the delay element. The explosive and the element are placed in the hat and the dimension of hat is designed to be assembled in the detonator shell. The excitation explosive is composed of ordinary explosive. PETN and RDX are compared on the successful explosion percentage and the precision of the delay time. The result shows that,granulated RDX and PETN could also be used as the excitation, but PETN is better to be used in instantaneous detonator and granulated RDX performed better in delay detonator.(2) To mensurate the detonation velocity. It is observed that the velocity became larger rapidly as well the distance is farer. It means that because the length of the excitation is shorter, the unsteady detonation happened in the explosive, or maybe deflagration. While calculating by the flyer model, the parameter of the detonation velocity should not be the steady detonation velocity.(3) Calculating the flyer velocity by the model, analyzing the experiment result and the numerical simulation course. It showed that the restricted condition effects the flyer velocity obviously. The velocity of the flyer is measured as 300m/s to 1500m/s. The final velocity is ensured as 534m/s and the extreme velocity under strong restrict is 1528m/s. The result gained by Stanyukovich theory,Azis modle,Yadav equation,Xie Xinghua formula and Geng Junfeng equation agreed with the experiment result. The Gurney energy is deduced by the results above that actually it is 10 to 30 percent for the Gurney energy to detonation heat.(4) the technique parameter of the high-safe instantaneous electric detonator,delay electric detonator,instantaneous non-electric detonator and delay non-electric detonator is given, figures of production flow is designed, and it can make some help to guide the industrial process.(5) The concept of linear delay element is invented. Assuring the delay time precision and the explosion reliability, by improving the tradition delay technology, great amount of the lead used can be reduced effectively, the cost can be lowed and environment pollution can be relieved.