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AssigneesChina Metallurgical Import & Export Corporation, China Metallurgical Safety Technology Institute
InventorsQuicheng Wang, Xianquan Li, Guowen Hu, Xiqin Zhang, Tianrui Xu
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The present invention relates to a non-primary explosive detonator comprising a hollow tube (1) with a closed end having a chamber containing a secondary explosive base charge (8), an opposite open end provided with or for the insertion of an igniting means (9, 15,16), and an intermediate confinement adjacent said chamber and containing an initiating charge (7), a delay composition (6) optionally being present adjacent said initiating charge. The characteristic feature of the detonator is that the confinement contains a secondary explosive initiating charge (7), by which the current drawbacks in connection with primary explosive initiating charges are reduced, and that it is thin-walled and in the end towards said chamber is open or provided with a thin wall or an aperture (5) or a recess thereof, to accelerate the burning of said secondary explosive initiating charge to a shock wave that causes detonation of said secondary explosive base charge, and a hole (4) which permits ignition of said secondary explosive initiating charge via the igniting means (9). By the special design of the confinement the detonator is very versatile as compared to previously known non-primary explosive detonators. The invention also relates to a separate initiating element having the structure disclosed above for the confinement.
A non-primary explosive detonator comprising a hollow tube with a closed end having a chamber containing a base charge of a secondary explosive, an opposite open end adapted for the insertion of an igniting means, and an intermediate confinement adjacent said chamber and containing a pressed, initiating charge of a secondary explosive, the base charge being arranged to detonate by activation of the igniting means to ignite said initiating charge, wherein the confinement is thin-walled and contains said initiating charge, the confinement having an access permitting ignition of said initiating charge via the igniting means, and wherein an intermediate charge of a secondary explosive is arranged between the initiating charge and the base charge, said intermediate charge having a lower pressing density than said initiating charge.
An initiating element for use in a non-primary explosive detonator, comprising a thin walled confinement containing an initiating charge of a secondary explosive for exploding a base charge of a secondary explosive positioned outside of said confinement, an access in said confinement permitting ignition of said initiating charge via an ignition means, an intermediate charge of a secondary explosive arranged between said initiating charge and said base charge, said intermediate charge having a lower pressing density than said initiating charge, and means for conducting a shock wave from said confinement to said base charge.
An initiating element according to claim 44, wherein said shock wave conducting means comprises one of a thin walled member, an aperture, and a recess.
A non-primary explosive detonator, comprising:
Dependencies are inferred from the claim text.