SAFE HANDLING ELECTRIC DETONATOR Russian patent published in 2017 - IPC F42C19/12 

Abstract RU 2634949 C1

FIELD: blasting.

SUBSTANCE: safe handling electric detonator comprises a body with current leads, inside which explosive charge is installed, an initiator with electric leads, MEMS switches made in the form of microelectromechanical systems open in initial position which respond under the action of overload, electronic-time unit providing for counting time of the overload action exceeding the threshold level and forming a control signal at the output if the detected time exceeds a certain value. One of the MEMS switches is arranged so that closing of contacts is effected under the influence of overload exceeding the threshold level acting along longitudinal axis of the electric detonator. Two or more MEMS switches are arranged so that closing of contacts is effected under action of centrifugal forces during rotation of the electric detonator about the longitudinal axis, the MEMS keys are arranged around the axis of rotation, preferably diametrically opposite. One of contacts of MEMS switch operating under the action of longitudinal overload is connected to one of current leads of electric detonator, and the other contact is connected to the input of the electronic-time unit which output is connected to one of the outputs of the initiator. The MEMS switches which operate under the action of centrifugal force are connected in series into electric circuit, one end of which is connected to the second current lead of the electric detonator, and the second end of the said circuit is connected to the second electric lead of the initiator.

EFFECT: invention makes it possible to increase safety of electric detonator in service handling, control the level of axial overload and rotation speed of the electric detonator.

1 dwg

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RU 2 634 949 C1

Authors

Shepelenko Vitalij Borisovich

Dates

2017-11-08Published

2016-10-10Filed