What is a blast tube?
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November 02 13:08:54, 2021
The squib is a blasting body that detonates the detonating cord. Can be divided into one-way millisecond squib and two-way millisecond squib. As shown in Figure 1.
Figure 1 Schematic diagram of the squib
(α) two-way tube blasting tube: 1-detonating tube; 2-outer casing; 3-detonator shell;
4-reinforced cap; 5-black gold ; 6-DDNP; 7-delay;
8-long inner tube; 9-detonation tube; 10-paper pad
(b) One-way blast tube: 1-actuated detonating cord; 2-black gold; 3-DDNP;
4-reinforced cap; 5-delay drug; 6-paper pad; 7-dray shell; 8-long inner tube;
9-outer casing; 10-detonation tube; 11-joint tube; 12-active detonating cord
Following the expiration time of the squib, the accuracy is high, the detonation is reliable, the construction operation is simple, and it is easy to grasp, but the amount of field application is still small.
The principle of the two-way squib is the active end (first detonation) detonating cord detonation, causing the active end of the fire tube in the millisecond squib to detonate, the active end delaying drug detonation, detonation, high temperature and high pressure After the high-speed jet passes through the shrinkage hole, the shock wave is attenuated and the passive end deferred medicine is ignited, thereby detonating the detonator and causing detonation of the detonating cord at the fluctuating end. The one-way squib is different in that the active end and the passive end are not interchangeable and the active end has no deferred medicine. The two-way squib is a detonation of dinitrodiazophenol (DDNP) to generate a high temperature and high pressure jet to ignite the main and passive end. The drug, while the one-way squib is the detonation of the detonating tube to produce a high temperature and high pressure jet igniting deferred medicine.