Device for fitting an extraction sleeve into a steam-generator tube and corresponding process for the extraction of a tube portion

摘要

The fitting device comprises a guide sleeve (75) having, at one of its ends, a profile complementary to a profile located at a first end of an extraction sleeve (85); a retention sleeve (100) having at one of its ends, a profile complementary to a profile located at the second end of the extraction sleeve (85), and an arrangement for fastening the retention sleeve (100) to the entry face (3a) of the tube plate (3). For the installation of the extraction sleeve (85) and for the installation, control and extraction of a glue-injecting syringe, the device also includes an actuating member (17) and an elongate transmission element (18) connected at one of its ends to the injection syringe and at its other end to the actuating member (17). The extraction sleeve (85) can be connected to the guide sleeve (75) and to the retention sleeve (100), in order to be installed inside the tube (5) to be extracted. The glue- injecting syringe is arranged inside the extraction sleeve ( 85) and is controlled manually by the actuating member (17) and the flexible transmission element (18). The invention also relates to a process for extracting a generator tube portion remote from the ends of the tube.