Drg (uk) Limited

David A Evans

Paul J Dowden

A tippling installation for the discharge of bulk goods from large barges comprises a dry basin in which a trough-shaped cradle can have its ends sealed against opposite end walls of the basin in which there are lock gates. The cradle provides a holding vessel into which the barges are floated through the lock gates. After closing the gates and draining the cradle, the barge is tipped by rolling the cradle sideways along guide and support tracks which provide positive location while the barge is held clamped in the cradle. The contents of the barge are discharged into a receiving space from which any liquid is drained to separate it from the discharged solids that are then collected. The arrangement is able to prevent pollution of the waterway by the escape of any of the barge contents during discharge. Because they roll on fixed supports relatively little lifting efforts needs to be expanded and very large barges can be handled.

Barge tipplers or dumpers

A stacker-reclaimer with a luffing and slewing mounting supporting a boom structure with a main, forwardly extending boom having a material conveyor running along it, and a rearwardly extending tail boom with a counterbalance weight depending from its rear end. The tail boom is at a higher level than the main boom to provide clearance for a feeder conveyor to the a material conveyor. The counterbalance weight is attached by a pivot on the tail boom and is displaceable about the pivot by a control cable attached to a non-luffing part of the luffing and slewing mounting forwards of the luffing axis whereby the weight is displaced forwards in relation to the pivot in upward luffing movements of the boom structure. This compensates for the rearward displacement of the rear end of the tail boom in such movements, and reduces the maximum overturning moment to be resisted in the working luffing range.

Stacker-reclaimer including counterbalance weight

A bucket wheel for a bucket wheel unloader has a series of buckets mounted on pivots around its periphery so that the buckets can be displaced between opposite end positions to correspond with either direction of rotation of the wheel. Latching means engage the buckets to retain them in their required end positions and operate automatically when the direction of rotation of the wheel is reversed.

Growing community of inventors

Bristol, United Kingdom

David A Evans