Nozzle changing device for cutter dredger, comprises nozzle support structure and work platform pivotable between horizontal and raised positions

摘要

A nozzle support structure can be fixed to the work platform (6) in a position beneath the central opening in the platform. The structure and platform can be pivoted together about a first horizontal axis between a horizontal working position and a raised position in which the cutter ladder can be raised. The structure and platform can be lowered into the working position when the cutter ladder is in a raised position. The support structure comprises a base and two length side walls connected to the platform at the length edges of the central opening. The structure includes a horizontal steel frame which can support the nozzle (12) and is in the form of a flat rack (16). An independent claim is also included for a method for replacing a first cutter dredger nozzle connected to a suction tube, comprising the following steps: (A) moving the work platform into a raised position; (B) moving the cutter ladder into a raised position; (C) lowering the platform into a horizontal position beneath the first nozzle; (D) removing the first nozzle from the cutter ladder; (E) removing the first nozzle from the support structure; (F) positioning a second nozzle on the support structure; and (G) mounting the second nozzle on the cutter ladder.