Ontwerp van een mobiele continu-losser voor overslag van stortgoed vanuit binnenvaartschepen
Report 92.3.TT.3076, Transport Engineering and Logistics.
A continuous unloader has several advantages over a grab-crane. Less
dust-emission, less spilling and low dynamic loads are the most important
advantages. A continuous unloader can be designed as a mobile crane. A
mobile crane rides on pneumatic tires, but stands on stamps during
unloading. The mobile continuous unloader doesn't need especially designed
quays and can be used at different locations. Because of the severe demands
considering dust-emission, a mobile continuous unloader can well be used
at inland harbours.
While the mobile unloader stands on stamps during unloading, a large reach
is necessary. Therefore the unloader must be a luffing crane. When luffing,
the transport-system of the unloader must follow the luffing movement of the
crane, this makes luffing more difficult. A continuous unloader consisting
of a luffing crane with a single jib and a articulated transport-system can
make a sufficient luffing movement. Lifting and luffing are separated and
the crane is a level-luffing crane. To ensure levelng, the luffing movement
of the jib must be coupled to the movement of the transport-system. This is
a mechanical coupling.
The mobile continuous unloader can compete with existing grab-cranes. A less
experienced crane operator can reach full capacity for a long time. This
capacity is comparable to the capacity of a 20-tons mobile grab-crane. A
thorough cost-estimation must prove, whether a market for the mobile
continuous unloader exists.
Reports on Transport Engineering and Logistics (in Dutch)
, TU Delft