MACHINE FOR SCRATCHING INNER SURFACE OF CONDUIT

摘要

An apparatus for scratching an inner surface of a conduit is provided to uniformly scratch the inner surface of the conduit and to vary the height of a casing and a scratching board of a vibration member installed in the casing by using a cylinder and a damper. An apparatus for scratching an inner surface of a conduit which moves forward by automatically running in the conduit includes a front body(10), a rear body(20), a center body(30), and a scratching board(62). The front body includes a front wheel(12). The rear body includes a rear wheel(22). The center body is arranged between the front body and the rear body. The center body rotates around a center axis(X1) by a motor(26) installed on the rear body. The center body comprises more than two scratching devices(40). The scratching board of the scratching devices scratches the inner surface of the conduit by oscillating up and down while the scratching devices rotate on the center axis of the center body. Leg devices are mounted on the front body and the rear body respectively.