Mechanical plug feeding mechanism.

摘要

A feeding mechanism for delivering plugs seriatim from a cylindrical delivery chute having upper and lower latching mechanisms for use in plugging selected tubes of a nuclear steam generator. A restraining mechanism engages a plug resting on the lower latching mechanism restraining the plug against rotational movement when the lower latching mechanism is in the latching position thereof; an actuating mechanism moves the lower latching mechanism from the latching position to the unlatching position thereby allowing a first plug to be dispensed from the chute while simultaneously moving the upper latching mechanism toward the latching position to engage a plug and prevent it from travelling through the chute until the first plug has been dispensed.