| 摘要 |
The invention relates to an inspection device for the tube plate of a heat exchanger. It comprises a motive part (2) mounted on a support equipped with fixing means to the inlet face of the tube plate. The motive part (2) is driven in rotation and in translation along the axis of the tubes. The device also comprises an active part (1) carrying an inspection probe (10) and guide means (17) for the probe (10) in the tubes. The active part (1) consists of a central shaft (8) and at least one sleeve (14) mounted rotatably on the shaft (8). The sleeve (14) comprises, in its side wall, at least two sets, spaced along the axial direction, of three orifices (15) placed at 120 DEG . Each of the orifices (15) contains a ball (17) projecting outwards. The active part (1) is connected to the motive part (2) by an articulation (3) permitting a disalignment between the active part (1) and the motive part (2). The invention is applicable particularly to the inspection of the defects under casing of a tube plate of a steam generator of a pressurized water nuclear reactor, with a Foucault current probe. |
