The utility model discloses a middle trough of mineral conveyer, belongs to the scraper conveying technical field, including two groups of
recovery subassembly, and
recovery subassembly includes filter screen, first
water pipe, and the both sides of middle plate upper end are provided with collecting groove, and one end of first
water pipe is communicated with the slot mouth department of collecting groove, and the other end is communicated with water tank, and filter screen is located between first
water pipe and collecting groove. The utility model discloses a middle trough of mineral conveyer, through spraying mechanism, the lubricating liquid in water tank can be extracted and is sprayed to the surface of middle plate from its spraying end, forms a layer of even lubricating film, along with the
continuous operation of scraper chain, the lubricating film on middle plate is constantly replenished, and the
friction coefficient between scraper and middle plate is effectively reduced, and the additional
wear and tear produced because of
dry friction is avoided, and the redundant lubricating liquid can flow into collecting groove, and collecting groove will guide the lubricating liquid into first water
pipe after filtering through filter screen, and finally flows back into water tank through first water
pipe.