COMPLEX FOR EXTRACTION OF BURS Russian patent published in 2009 - IPC E21C50/00 

FIELD: mining.

SUBSTANCE: invention can be implemented, for instance for extraction of iron-manganese burs from bottom of the Baltic Sea shelf at relatively shallow bedding. The complex for extraction of burs consists of a base vessel, of receiving facility arranged thereon, of a lifting mechanism, of deflecting blocks, of pulling cables, and of facility for excavating burs from the sea bottom. The facility for excavating burs from the sea bottom is made in form of two-chain loop vertically closed at driven and tension sprockets; cross plates are secured on the loop with a minimal gap between them. At the initial position of the facility the plates are arranged on the upper branch of the two-chain loop and on the driven and tension sprockets; the sprockets are enveloped at the angles of 180 degrees. The end plates located in zones of loop rounding the driven and tension sprockets form angles with a lower branch. Bearings of axes of the driven and tension sprockets are installed in vertically oriented flat side walls overlapping the two-chain loop by length and height. At their tops the side walls are connected between them with cross beams placed on the ends of the walls. Round-link chains are arranged on the ends of the beams; the chains are connected with their other ends with a horizontal cross bar of a rectangular shape in plane and located crosswise relative to the side walls. The cross bar in its turn is connected with two hooks of a movable cartridge of doubled polyspast of a lifting mechanism made in form of a swing crane with a flexible boom. Vertically oriented acute-angled pins are assembled on the lower edges of the side walls on their ends; the pins are designed to be inserted into bottom soil. The receiving facility is made in form of inclined towards one another and interacting guides; the said receiving facility is oriented in horizontal plane when burs are discharged from it. An inclined grid iron is assembled under the guides; burs are directed onto the grid and unloaded from it into movable containers. A monitor supplying clean water on the grid is installed above the grid. A sump is installed under the grid.

EFFECT: increased efficiency of complex due to simplification of design, increased manoeuvrability, reduced labour intensiveness and increased output.

2 cl, 3 dwg