METHOD OF CONTROLLING HYDRAULIC STRUCTURE OF WATER FLOW AT CIRCULATION THRESHOLD IN WATERCOURSE BED WITH WATER INTAKE STRUCTURE Russian patent published in 2024 - IPC E02B9/04 E02B8/02 E03B3/36 

FIELD: hydraulic structures.

SUBSTANCE: invention relates to hydraulic engineering and can be used for water intake directly from the bottom channel of a watercourse, the water of which contains a large amount of sediments and debris, as well as during water intake into channels, pipes and front chambers of pumping stations. Method consists in controlling the hydraulic structure of the water flow downstream of the water intake directly by the installation in front of the bucket water intake of the retaining structure in the form of two water overflow walls (sills) 5 and 6 at the bottom of the watercourse bed, forming drainage channel 4 between them. Inlet of the bucket water intake chamber 3 is equipped with protective grid 15 at an angle. Protective grid 15 rests on ledge 16 with its free end. Outlet from the water intake chamber 3 towards front chamber 7 is equipped with three holes, the width of which is limited by L-shaped shelves and an inclined wall with inclination angles within α₁=60–70°, α₂=40–50°, α₃=30–35° respectively, relative to the bottom of the exit towards front chamber 7. Water overflow transverse walls (thresholds) 5 and 6 have height equal to h_w= 0.3h_d, where h_d is the water depth in the discharge channel of watercourse 1. Dividing L-shaped wall 2 of bucket water intake 3 with broken outline, fixed parallel to the bank, is directed towards the formed drainage channel 4. Presence of drainage channel 4 facilitates the free passage of sediments into the discharge channel of watercourse 1, and the transverse water overflow walls (sills) 5 and 6 create the possibility of backwater and the flow of pure water through grate 15 first into bucket chamber 3 and further into front chamber 7 uniformly along its width due to the presence of three holes with L-shaped shelves. Elevations of the bottom of front chamber 7 and the channel of watercourse 1 do not coincide, as a result, a given water intake takes place. Structure of the vertical wall of the broken outline (in the form of an angular joint) as a whole facilitates the squeezing of sediments towards the flow of drainage channel 4 into the lower pool of the outlet channel of the watercourse.

EFFECT: invention allows, due to transverse retaining water overflow walls (thresholds), to create water backwater in front of the inlet to the bucket water intake of open type and to create hydraulic conditions providing water supply uniformly along its width, and effective protection from sediments and ingress of debris during water intake, and also provides simplification and reduction of metal consumption.

1 cl, 1 dwg