FOLDABLE GATE Russian patent published in 2008 - IPC E02B7/48 

FIELD: hydraulic structures, particularly to span navigable dam bays of river hydrosystems.

SUBSTANCE: gate comprises rotary trusses. Each truss comprises front and rear inclined legs connected with each other in upper parts thereof and pivotally connected to apron by lower leg parts. The trusses are installed so that openings are created in-between and are spanned with plates fixedly connected to round rods secured to front legs so that the rods may rotate about axes thereof. The trusses are connected to removable railing through removable junctions. In working positions some openings between trusses are closed, other one are opened. Openings between trusses are closed and opened by rotation of round rods with plate connected thereto. Water is discharged from upper pool into lower pool through opened openings. In winter period, ice-drifting and flood periods trusses are laid on apron. In flood period ships sail over the trusses. After flood period trusses are installed in working, vertical, position and ships move through lock included in hydrosystem. Bottom gate regulates discharged water volumes and water level in both pools by changing number of opened openings between the trusses.

EFFECT: increased efficiency.

4 dwg