HYDRAULIC CLASSIFIER Russian patent published in 2015 - IPC B03B5/02 B03B5/62 

FIELD: machine building.

SUBSTANCE: hydraulic classifier comprises a casing, a screening device set along the casing, branch pipes for water supply and fine fraction removal set at the casing corners being opposite to each other as per diagonal in its longitudinal section, branch pipes for suspension supply and removal set at the other casing corners being opposite to each other as per diagonal in its longitudinal section, a vibrator, the screening device consists of sieves coupled pairwise along the perimeter by a shell. The branch pipes for suspension supply and removal are communicated with the inner space of every pair of sieves. The vibrator is coupled with the screening device. Flexible pipelines are connected to the branch pipe for suspension supply, divergent nozzles with curvilinear spiral-like guides at their inner surface are installed on the pipelines in tiers within the half of the suspension chamber height and are located in the inner space of every pair of sieves interconnected by resilient plates. Side end faces of the suspension chambers are enclosed by mesh. The vibrator is equipped by a drive with speed controller. The speed controller is connected with the pressure regulator coupled with a pressure sensor mounted in the water supply branch pipe. The pressure regulator comprises interconnected comparators and setting units, electronic and magnetic amplifiers and a nonlinear connection unit. The speed controller is made as a unit of powder electromagnetic clutches.

EFFECT: improved efficiency and productivity of classification due to the regulation of consumed power at the vibrator drive depending on the alternating pressure in the water supply branch pipe determined by the hydraulic resistance of the suspension specified by the concentration of fibre material in the mix being classified.

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