GEOHOD (BLADE SHIELD) Russian patent published in 2015 - IPC E21D9/06 

FIELD: construction.

SUBSTANCE: geohod (blade shield) comprises head and end cylindrical sections. In the front part of the head section on a frame structure there is an actuating element of a geohod, comprising two breaking cylindrical elements of drum type, connected with a motor and installed at the angle α in diametral plane with eccentricity e relative to the longitudinal axis of the geohod. On the external side of the head cylindrical section there is a propulsion device fixed, made in the form of short sectors of a double-threaded spiral surface. In front of them there are breaking elements of the propulsion device of cylindrical shape, on the side surface of which there are radial cutters arranged. The driving motor of the breaking elements of the propulsion device is installed on the inner side of the head section. On the end cylindrical section there are longitudinal elements of counterrotation fixed with breaking organs of elements of counterrotation of cylindrical shape installed in front of them, the axis of rotation of which is perpendicular to the longitudinal axis of the geohod.

EFFECT: increased reliability of operation and reduced metal intensity of a unit, increased speed of tunnelling and manufacturability of unit manufacturing, expanded area of application of a unit.

7 dwg