Patent ID: 8485139

Claim:
An apparatus for visually inspecting and removing a foreign object in gaps of a bundle of heating tubes of an upper portion of a tube sheet of a secondary side of a steam generator, the apparatus comprising: a mounting fixture fixed to a flange surface of a hand hole of the steam generator by a bolt and having horizontal and vertical level gauges installed thereon, wherein the horizontal and vertical level gauges check a change in an angle of right and left rotation of the mounting fixture, and a change in an angle of horizontal and vertical movement of the mounting fixture; a guide rail of which one side is fixed to the mounting fixture, wherein a first end of the guide rail is coupled to a center stay rod disposed at a central portion of the steam generator, and a second end of the guide rail is coupled to a driver; a detector coupled to a lower end of the guide rail so as to slide on the lower end of the guide rail, inserted into the steam generator by a moving belt, and visually inspecting and removing a foreign object; the driver providing power so as to drive the detector, wherein one side of the driver is coupled to the guide rail, and is simultaneously coupled to a rail supporter of the mounting fixture; and local and remote controllers adjacent to the steam generator and controlling the mounting fixture, the detector and the driver; a flange having four bolts installed therein so as to fix the mounting fixture to the flange surface of the hand hole of the steam generator; a panning plate of which a front surface is coupled to the flange so as to slide in a lateral direction of the flange; a tilting lever hinged to a rear surface of the panning plate; the rail supporter coupled to the tilting lever and supporting the guide rail; and two cable guides disposed on a rear surface of the tilting lever so as to stably accommodate cables from the detector therein and to prevent the cables from being entangled and damaged.