| 摘要 |
The device has a sand transport piping (130) connected to a blower (140) generating a flow of transport air at low pressure. The piping comprises an input (131) that is connected to the blower. An inbound sand body (150) is formed by a pipe junction (151). The inbound sand body is connected on an outlet side (122) of a sand hopper (120) to introduce sand into the air flow crossing through a main branch. A riser (137) continuing with a swan neck (138) is connected to an air and sand separating unit (160) and with a flexible tube (139) in a sand box (S).
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