| 摘要 |
FIELD: mining.SUBSTANCE: small-size vibration screen contains the screening surface, which is elastically installed on the base, fitted with a drive, and is designed as hollow in the form of square with curvilinear screw punched surface along the internal perimeter in the form of curvilinear pockets oriented in the same side at the angle 10°-70° to the screening surface axis. The screening surface is formed by four hollow punched sections which are rigidly joined to each other in alternately manner, and implemented in the form of the hollow circular punched sector with four hollow rectilinear punched sections. Four punched sections implemented in the form of the hollow circular punched sector are made from the punched strip with formation of quadrangles, with different sizes, with two parallel sides in the form of fold lines located on the punched strip at equals distances from each other and in parallel to each other. The punched strip is curtailed into the punched ring - the punched subsection along the perimeter of which the curvilinear pockets are arranged. The punched subsections are joined to each other by free sides of the named quadrangles in the form of the hollow circular punched sector with formation along external and internal surfaces oriented towards the same side at sharp angle to the axis of the hollow circular punched sector of screw lines and screw internal punched surfaces in the form of curvilinear pockets the perimeters of which can differ not only by shape, but also by sizes. The distances between fold lines are mutually equal and equal to the sum of lengths of perimeters of geometric shapes of internal pocket surfaces. Four hollow punched rectilinear sections are made of the punched strip bent along the straight lines arranged at an angle to edges of the punched strip. The punched strip is curtailed into cylindrical turns with formation along external and internal surface of screw lines, and also of screw punched curvilinear surfaces in the form of pockets of the internal punched semicircular surface the perimeters of which can differ not only by shape, but also by sizes. The distances between fold lines are mutually equal and equal to the sum of lengths of perimeters of geometric shapes of internal punched pocket surfaces.EFFECT: screening efficiency improvement.14 dwg |
