Process and a device for exactly holding the vertical excavating direction of a diaphragm wall
AssigneeStahlund Apparatebau Hans Leffer GmbH
InventorMichael Leffer
Life of this patent
Estimating the term…
Abstract
A process for exactly holding the vertical excavation direction of a diaphragm wall using a hydraulic diaphragm wall grab cooperating with an excavator and having an outer guide body and an inner body for receiving the grab appliance is improved and rendered considerably more efficient by the fact that the vertical position of the inner body and/or the guide body is continuously controlled by means of an inclination detector whose-signals are transferred to a controller which, in case the bodies of the grab deviate from the predetermined vertical position, compensates said deviation by swivelling the inner body relative to the guide body in opposite direction to the deviation.
Claims9
A process for maintaining a vertical excavating direction of a diaphragm wall during excavation with a hydraulic diaphragm wall grabber cooperating with an excavator and having an outer guide body, an inner body mounted in the outer guide body and a grabber appliance mounted to the inner body, said process comprising:
- detecting, with an inclination detector, an inclination of at least one of the inner body and the outer guide body relative to a vertical direction;
- controlling, with a control unit operatively connected to the inclination detector and at least one of the inner body and the outer guide body, an orientation of at least one of the inner body and the outer guide body so as to compensate for deviation of the at least one of the inner body and the outer guide body to which the control unit is operatively connected by swiveling the inner body relative to the outer guide body in a direction opposite to a direction of the deviation.
A device for maintaining a vertical excavating direction of a diaphragm wall, said device comprising:
- an outer guide body;
- an inner body mounted in said outer guide body;
- at least one grab shovel hingedly mounted to said inner body;
- at least one horizontal journal connecting said inner body to said outer guide body;
- a hydraulic swivel mechanism operatively connected between said inner body and said outer guide body;
- an inclination detector operatively connected to at least one of said inner body and said outer guide body for detecting an orientation of said at least one of said inner body and said outer guide body relative to a vertical direction;
- and
- a control unit, operatively connected to said inclination detector and said at least one of said inner body and said outer guide body, for operating said hydraulic swivel mechanism to control an orientation of said at least one of said inner body and said outer guide body so as to compensate for deviation of said at least one of said inner body and said outer guide body to swivel the inner body relative to the outer guide body in a direction opposite to a direction of the deviation.
Dependencies are inferred from the claim text.