SUCTION DREDGE DRAGHEAD Russian patent published in 2006 - IPC E02F3/88 

FIELD: hydromechanization, particularly for underground ground development.

SUBSTANCE: draghead comprises suction head and ejector with water channel, abrasive and ejector nozzles, receiving and mixing chambers and diffuser. The receiving chamber is provided with removable case having end collar to be clamped in depression between flanges on outer generatrix of fixed receiving chamber part from the first case side and secured in front end of working water collector from the second side thereof. Annular nozzle is defined by outer cylindrical surface of removable case and inner surface of mixing chamber. The removable case and mixing chamber are coaxial one to another and retained by means of plate fixers formed on inner generatrix of mixing chamber. Pipeline is provided with regulation means installed in working water collector inlet.

EFFECT: increased output and reduced power inputs for ground suction due to improved flow mixing in mixing chamber.

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