Two systems are often used to discharge bulk materials from bunkers:
Pull/push floor
Several "ladders" lying next to one other are pulled or pushed over the bunker floor, depending on whether the driving hydraulic cylinder engages the head or tail part of the ladder and pulls or pushes it. The conveyor device slides over the floor of the bunker and the bulk material stored there is con-veyed to a discharge edge.
Walking Floor® from KEITH®
Alternatively, the American manufacturer KEITH offers a system whereby the entire floor moves. The bunker floor consists of single planks lying next to one another and interconnected under the floor in groups of three. In the discharge process, all planks are moved simultaneously over the preset travel distance in the direction of the discharge edge. Every third plank is then withdrawn. The bulk material remains in the position reached due to internal friction. After all planks have been retracted, the forward movement starts again and the material falls over the discharge edge into the next conveyor device.
We have planned, delivered and installed installations with both systems.
