WORKING CHAMBER OF MECHANICAL FISH LIFT (VARIANTS) Russian patent published in 2008 - IPC E02B8/08 

FIELD: fish-passing structures permitting fish passage through support structures to fish hatchery and growth areas.

SUBSTANCE: working chamber comprises bottom rectangular recess transversal to fish accumulation gutter and extending for the full width thereof. Working chamber also has transport container arranged in bottom recess and connected with vertical position drive through flexible tie members, fish shielding device arranged from supply unit of mechanical fish lift. The fish shielding device includes electrode system and fish grid installed so that it may rotate about horizontal axis. Electrode system is fixedly secured along fish accumulation gutter and includes a row of electrodes. Working chamber has screen to close upper opening of bottom recess, guiding and additional drive with flexible ties. Guiding means and screen are arranged in bottom recess. Guiding means are of shape and are located in side walls of bottom recess. Parallel branches of guiding means are located in upper and lower parts of bottom recess. End screen edges adjoining side walls of bottom recess are provided with rollers located in guiding means. Upper end edge of the screen is connected with additional drive through flexible ties. Lower end edge of the screen has counterweight. In the second embodiment guiding means and screen are located over bottom recess. Screen is flat and is connected to load-bearing frame. End screen edges adjoining bottom recess sides have rollers arranged in guiding means, which are created in lower parts of side fish accumulation gutter walls and parallel to bottom thereof. Screen ends facing upper and lower pools are connected with additional drive through flexible ties.

EFFECT: decreased fish traumatizing.

11 cl, 15 dwg