| 摘要 |
<p>1. Trough grating provided in the bottom of a store for grain-like material, such as grain and similar, through wherein air or another gas is to be blown, characterized in that it comprises concave elements (9) which lie some horizontal distance away from one another, in such a way that spaces (10) are formed between said elements (9), and which face upwards with the concave side thereof, said spaces being covered by protection or covering parts (11) which enter the hollow space (12) from the concave elements (9) in such a way that deflecting passageways (13) be formed therewith, wherethrough a gas stream blown in said trough (3) is subjected to deflecting from said spaces at an angle of at least 90 degrees relative to the vertical direction and rises from said trough, the size and shape of said deflecting passageways (13) being so designed that substantially no grain-like material (7) can enter under the action of gravity into said spaces (13) along a direction opposite to the gas stream (14).</p> |
