Following the exploration and maintenance of a network of tubes of a list of steam.

摘要

The invention relates to a vehicle for exploring and maintaining a network of tubes which are implanted in a perforated plate and open in a water box of a steam generator. The vehicle comprises means which make it possible for it to hold itself in position under the perforated plate by hooking into the network of tubes and to move against this plate for exploring and maintaining the different tubes. According to the invention, a single, non-turning hooking head (101) is provided, which is equipped with expansible hooking fingers which are rigidly integral with said head; two telescopic arms (102, 103) which are mutually independent in movement and in control, are mounted on either side of the head (101) so as to be capable of turning about the axis of said head, each arm being equipped with expansible hooking fingers (116, 118) which are mounted telescopically in relation to the associated arm; a tool support (104, 105) is moreover mounted at the free end of one and/or the other of the two telescopic arms (102, 103). Application to the inspection and maintenance of the network of tubes of a steam generator. IMAGE