APPARATUS FOR AUTOMATICALLY COUPLING AND SEPARATING BETWEEN EXTENSION ROD ASSEMBLY AND MOVABLE MEMBER ASSEMBLY OF CONTROL ELEMENT DRIVE MECHANISM

The present invention relates to a control rod driving apparatus installed on the lower side of a research reactor and, more particularly, to an apparatus for automatically connecting or separating an extension rod assembly to or from a movable member assembly of the control rod driving apparatus, capable of easily repairing or correcting the control rod driving apparatus by automatically connecting or separating the extension rod assembly to or from the movable member assembly at need. For this, the apparatus for automatically connecting or separating the extension rod assembly to or from the movable member assembly of the control rod driving apparatus according to the present invention includes a plunger stator which is combined with the upper side of the movable member assembly, a bushing which is combined with the lower side of the extension rod assembly and includes a ball which is elastically supported to reciprocate in a diameter direction on the outer side, a plunger mover which includes a ball groove into which the ball of the bushing is inserted on the inner side thereof and is installed on the upper side of the plunger stator to vertically move, a spring which is installed on the upper side of the plunger stator and elastically supports the plunger mover, and an electromagnet which is installed on the outer circumference separated from the plunger stator and the plunger mover and separates the extension rob assembly from the movable member assembly through the separation of the ball from the ball groove by downwardly moving the plunger mover by an electromagnetic force when current is applied.