AUTOMATIC ACTION DEVICE FOR FLUSHING DRAINAGE OF LOW-HEAD EARTH DAMS Russian patent published in 2017 - IPC E02B11/00 E02B7/06 

FIELD: construction.

SUBSTANCE: device 5 comprises a horizontal water intake column 1 located in a zone of periodically overloading the levels of the head race 2. The filtration column 1 consists of a sleeve 3 and a filter filling 4. The filtration column 1 through the inlet pipe and the filtering perforated geotextile material with a mesh provides filling the pressure chamber 9 located inside the accumulation tank equipped with an inspection well 10 during the rise of the head race 2 level. In the pressure chamber 9 bottom, there is an opening with a valve 12 connected by a hinged-lever mechanism consisting of levers 13 and 14, with a float 15, through a rod 16. The lever 14 is fixed on an axle. The float 15 is located in the accumulation tank 18. The float 15 is connected via the rod 16 to the lever of an adjustable lock fixed thereto, made of an upper section and a lower section, connected together by a swivel and two hinges. A lever with a stop is fixed to the bottom section of the lock. The adjustable lock is fixed to the pipe head with a clamp. A gravity water conduit 29 is connected to the inspection well 10 of the drainage system 32 to be flushed. The discharged water passes through the gravity water conduit 29 in the intersection zone of the anti-filtration dam element 30 and the anti-filtration diaphragms 31 to the inspection well of the drainage 32 to be flushed.

EFFECT: regulation efficiency of the operation of drainage structures, increasing reliability and service life.

2 dwg