TRENCH UNDERWATER DIGGING SET Russian patent published in 2004 - IPC

FIELD: hydraulic engineering. SUBSTANCE: invention relates to device designed for underwater working of ground. Proposed set for underwater digging of trenches contains base and ground intake mechanism. Base is made in form of closed type sledge with overhangs on ends and on wire rope. It is furnished with horizontal turnable platform on which ground intake mechanism is mounted made in form of slot sucker with layer-by-layer delivering ripping device with drive. Sucker is connected with discharge branch pipe by means of flexible hose. Discharge branch pipe is installed stationary relative to sledge on turnable platform. Ejector mud pump and centrifugal pump with working water delivery branch pipe coupled with drive are installed between discharge pipe and flexible hose. Layer-by-layer delivering ripping device is made in form of vertical knives stationary installed on shaft on which blades are mounted. Said shaft is installed for moving in supports and is connected through system of levers with drive. Number of knives and blades can be either different or equal to each other. Ripping device blades are installed directly before intake of sucker so that their edges are pointed to sucker intake. Sucker is installed for movement in vertical plane. Invention is aimed at creating simple, mobile and reliable design of set for digging underwater trenches differing in depth and width with provision of layer-by-layer removal transportation of ground at minimum turbidity. EFFECT: increased efficiency. 3 dwg