DROP STRUCTURE Russian patent published in 2016 - IPC E02D27/18 

FIELD: construction.

SUBSTANCE: invention relates to construction and can be used for excavation, in construction of downtake structures. Downtake structure includes walls, shear ring, pipe to feed fluid and device for excavation of soil, consisting of pump and discharge pipe connected with spiral tube with nozzles for pumping of slurry mass. Additionally introduced are mechanical oscillation generator with frequency regulator of its oscillations, connected by pipes for water supply to cutting ring. Feed pipe has two branches, one of which is located on outer side and is made in form of spiral, enclosing shear ring at its outer surface, and other is located on inner side of blade ring and is connected with sections of pipes, plugged on both sides, and installed along guide blade chamfer ring and equipped with holes for water supply into space of blade ring. First turn spiral pipe has holes guiding water flow along outer wall of structure, and rest turns of spiral have holes for supply of water jet at angle to external surface of blade ring.

EFFECT: technical result consists in ensuring uniform immersion sash structure along whole outline of blade ring.

1 cl, 3 dwg