| 摘要 |
<p>A sorting vibrating screen for rubble treating plants comprising a screen frame (2), a screening grating-like surface (6) having invariable openings (7), and a longitudinally following screening surface (8) having variable openings (9), wherein a) the screening surface (6) having invariable openings (7) covers the substantially part of the total screen surface, b) the screening surface (8) having variable openings (9,; 27) is formed by a single transverse row of variable, that is elastically opening openings (9; 27), and c) said variable openings have either an abutment slot (21, openings 9) which substantially extends in the longitudinal screen direction, or said variable openings (27) define a first invariable opening (28) directly facing the end (12) of the screen surface (6) having invariable openings (7) and two following lateral substantially longitudinal cuts (29) defining a flexible blade (25) which opens transversally to the longitudinal screen direction. By equal screen dimensions the screening power and the plant productivity are increased.</p> |
