SAFE ELECTRIC DETONATOR FOR BLASTING-PERFORATION EQUIPMENT Russian patent published in 2017 - IPC F42C19/00 F42C19/10 F42D1/04 F42B3/12 

FIELD: blasting.

SUBSTANCE: safe electric detonator for the blasting-perforation equipment contains an power point installed in the socket, consisting of two contacts connected at the end by a resistance bridge, a cylindrical body, starting and main charges and a through axial channel. The through axial channel is made three-step and comprises a first channel part of a relatively small diameter and a second channel part of large diameter connected by a conical section. The through axial channel is filled with the main charge of blasting explosive of low density and on both sides it is covered with a sticky metalized tape, from one end of the body bushing is fixed by thread and fixed with a heat-resistant glue, which has a cylindrical socket with an axial hole. The contacts of the power point are made in the form of a central and external contacts separated by a dielectric bushing. The socket cavity is filled with the starting charge of blasting explosive. On the other end of the body second cover is installed on the thread and fixed with a heat-resistant glue, contacting with a sticky metalized tape. The central contact is insulated from the body by dielectric tape with an adhesive layer. The ratio of the cross-sectional areas of the second large diameter part and the first small diameter part can be made in the range from 2 to 4. On the inner surface of the first part of the axial channel, the roughness is made by the height of the unevenness from 160 to 500 mcm. The roughness is made in class 1. The roughness is made in the form of a thread. In the starting charge of the blasting explosive, from 25 to 40% of the sensitizer can be introduced. As a sensitizer, quartz sand can be used. As a sensitizer, pounded glass can be used.

EFFECT: invention allows to ensure absolute tightness under any operating conditions, the supply of electric current to the electric detonator without wires and the exclusion of operation from static electricity.

8 cl, 12 dwg, 2 tbl