| 摘要 |
A method and apparatus are disclosed for cross-stream samnpling of bulk material from a conveyor belt. The apparatus includes a sampler movable across the conveyor belt for segregating a cross-stream increment of bulk material from the belt and ejecting the sample into a collection chute positioned adjacent the belt. The sampler has a trapezoidal cross-section so that the surface area which is projects upstream of the bulk material flow is relatively small in comparison to its sample-accepting capacity. The system also includes a surge dam positioned upstream of the sampler for limiting buildup of bulk material against the upstream side of the sampler. Upon completion of an increment-collecting cycle, the sampler is parked in a position relative to the opening of the collection chute so that ingress of bulk material into the chute opening from the belt is restricted by the sampler.
|
