SAND AND GRIT CATCHER Russian patent published in 2014 - IPC E02B8/02 B01D21/00 C02F1/52 E03F5/14 

FIELD: construction.

SUBSTANCE: sand and grit catcher comprises a main receiving cylindrical container 1 installed within an additional container 2 of a larger volume. The main receiving container 1 houses a hollow cylinder 10, coupled to the supply water conduit 12. The cylinder 10 is divided by a horizontal partition wall 13 into two cavities 15 and 16. The horizontal partition wall 13 has a hole in the middle part. Water-discharge windows 20 are located in the walls of the cylinder 10 above the partition wall 13. Water-discharge orifices 6 are located in the walls of the sloping bottom 5 of the main container 1 relative to each other. Water discharge orifices 6 are equipped with sediment intercepting elements in the form of gates 7 with the possibility of vertical movement towards the hollow cylinder from the side of the main container 1. The bottom of the main container 1 and the additional container 2 is inclined at a various angles to the horizontal axis of the apparatus, secured in the base of the foundation 28. Wash pipeline 24 runs in the centre of the additional container 2. Container 2 in the top of its wall is connected with clean water discharge pipe 25. In this step-hydraulic water regime with sediment going through the cylinder 10, container 1 into the additional container 2 in the form of constricting or expanding areas, the sediment will flow into discharge manifold, being flushed from the inclined bottom walls, and clean water will flow from the upper layers of the additional container 2 into the discharge pipeline 25 and further to the consumer.

EFFECT: efficiency and reliability is improved in changing energy parameters of the incident flow with benthic and suspended sediment, and hydrodynamic impact on the bottom of the additional container is reduced.

3 cl, 1 dwg