| 摘要 |
A scraper-chain conveyor has a scraper assembly and plurality of channel sections defining upper and lower runs for the scraper assembly. The scraper assembly passes round sprocket drums positioned at the ends of the conveyor, and is constituted by two drive chains and a plurality of scrapers connected thereto. The conveyor has first and second straight portions joined by a curved portion. The upper run of the curved conveyor portion is at a lower level than the upper run of the adjacent end of the first straight conveyor portion. The scraper assembly passes between the upper runs of said end of the first straight conveyor portion and the curved conveyor portion via upper and lower deflector rollers which direct the scraper assembly in a Z-shaped path. The upper deflector roller is provided with a drive, whereby the chain tension of the scraper assembly is negligible when the assembly passes round the curved portion.
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