Fixing device of cutter suction dredger crane span structure

The utility model relates to a fixing device of cutter suction dredger crane span structure, including setting up the fixed knot structure group between portal frame and crane span structure, the fixed knot structure is organized and is included that the symmetry sets up the fixed knot structure between crane span structure both ends and portal frame both sides respectively, and each fixed knot structure is including fixed wedge and wedge seat, the fixed setting of wedge seat the crane span structure tip to the space of carving shape has between the surface of wedge seat and the interior sidesurface of portal frame, fixed wedge can mate insert in the space and fixed connection on the wedge seat. The utility model provides a fixing device of cutter suction dredger crane span structure is applicable to and uses when boats and ships are dispatched or examine and repair for a long time, and the group can realize the fixed locking on the crane span structure left side right direction through the fixed knot structu