| 摘要 |
Silo emptying devices of the type of those comprising an external ventilation casing 2 connecting with the silo through ventilation corridors delimited by the bottom of the silo, ribs 6 and perforated plates 7, the latter forming, above the said corridors and in cooperation with two adjacent ribs, troughs emerging in a fluid-tight manner into an emptying pipe 9 and disposed in the said casing, the ventilation corridors and the troughs extending outside the silo as far as the casing 2 and the parts of the troughs located outside the silo being covered by tunnels 11. The tunnel 10 of the median trough extends as far as the centre of the silo. <IMAGE>
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