| 摘要 |
Pneumatic powder supply installation, wherein an injector (6) and the lower orifice of a supply conduit (8) form a valve (6, 8) opening or closing such conduit. A metering valve (30) is provided on the supply conduit, close to its outlet (4, 6) from the container (4); it is controlled by the pressure (31) prevailing in the conduit (29). It is thus possible to provide for a fine setting of the powder flow rate on a large scale, even when the powder flows with difficulty and/or tends to agglomerate, a sudden stop (14) of the supply, an immediate sweeping of the conduit (8), or a low power restarting of the supply (11/6,8). |
