SMALL-SIZE VIBRATION SCREEN Russian patent published in 2015 - IPC B07B1/28 

FIELD: mining.

SUBSTANCE: small-size vibration screen contains the screening surface, the drive, loading and unloading devices. The screening surface is designed as hollow, in the form of square, with formation along its internal and external punched perimeter of multiturn screw punched triangular surfaces in the form of pockets with curvilinear screw punched surface and unidirectional multiturn screw lines oriented towards the same side at the angle 10°-70° to the screening surface axis and is formed by rigidly connected, alternately with each other, four hollow punched sections implemented in the form of hollow circular punched sector with four hollow rectilinear punched sections. Four punched sections implemented in the form of the hollow circular punched sector are formed by punched subsections, each of which is made of punched strip bent alternately in different directions along straight lines in the form of fold lines located on the punched strip at equals distances from each other and placed at the angle to edges of the punched strip with formation of quadrangles, with different sizes, with two parallel sides, located on the punched strip alternately and in parallel to each other, and curtailed into the ring in the form of punched subsections, connected to each other by free sides of the named quadrangles with formation of hollow circular punched sector with multiturn screw punched triangular surfaces and unidirectional multiturn screw lines. Four hollow rectilinear punched sections are made from, at least, one punched strip bent along the straight lines arranged at an angle to edges of the punched strip with formation of identical parallelograms located on the punched strip alternately to the opposite sides. The punched strip is rolled into cylinder coils interconnected along lengthwise edges with formation on the internal punched surface of screw broken triangular pockets, and along the external surface - unidirectional broken screw lines.

EFFECT: screening efficiency improvement.

14 dwg