Automatic cover opening and closing mechanism for initiating explosive device medicament mixing tank

The invention discloses an automatic cover opening and closing mechanism for an initiating explosive device medicament mixing tank, which consists of a four-claw manipulator and a tank cover locking mechanism, and can realize the functions of automatically closing a cover before the beginning of medicament mixing and automatically opening the cover after the end of medicament mixing. The four-claw manipulator structure comprises a manipulator upper connecting circular plate, a pneumatic four-claw supporting column, a pneumatic motor, a manipulator lower connecting circular plate, a clamping sleeve, a clamping claw, an inner hexagonal shaft sleeve, a pin shaft and a spring; the pneumatic motor penetrating through the center position of the lower connecting circular plate of the manipulator is fixed through the pin shaft and the clamping sleeve, and the spring mechanism is additionally arranged in the clamping sleeve, so that the pneumatic motor can do linear motion in the vertical direction of the lower connec