Ejecting device for the supporting arrangement of a pouring stream protective tube in a continuous casting machine

The subject of the present invention is a support ejection device for a stream-protector tube (5), located between the pouring ladle (1) and the tundish (3) of molten metal of a continuous-casting installation. The device comprises a support member (20) of the protector tube (5) connected to a manipulator (12) intended to bring the protector tube (5) underneath the pouring ladle (1) and the pouring ladle (1) is equipped with means for temporary joining with the said protector tube, such as a nozzle providing a seal. The support member (20) comprises a first element (21) integral with the protector tube (5) and a second element (23) integral with the manipulator (12) and automatic means for mutually locking and unlocking the elements (21, 23), permitting the ejection of the stream-protector tube (5) from the pouring ladle (1) in the event of mishaps during casting.