Chain type adjustable scraper on flotation machine

The invention belongs to the technical field of flotation machine equipment, particularly relates to a chain-type adjustable scraper on a flotation machine, and solves the problems that reagent loss is increased and flotation quality and yield cannot be guaranteed due to the fact that a single scraper on a traditional flotation machine cannot scrape bubbles in time or cannot scrape bubbles. The chain-type adjustable scraper comprises a main shaft, an auxiliary shaft, a lifting shaft, a first lifting rod, a second lifting rod, a lifting motor, a main shaft motor, a plurality of chain type transmission mechanisms and a plurality of S-shaped scraper blades. The main shaft sleeves the outer wall of the lifting shaft; the main shaft is fixed on a fixing frame of a flotation tank; the main shaftmotor drives the main shaft to rotate; the lifting motor drives the lifting shaft to rotate; the two ends of the auxiliary shaft are clamped in an arc-shaped rails of the flotation tank; the first lifting rod and the second