| 摘要 |
The invention relates to a mixer with a fixed drum. According to the invention, the mixer comprises a central opening (6) which makes it possible to carry out measurements or operations directly in the mixture during mixing. The entire driving device (8) is located around a central pipe (7). It comprises inter alia a movable ring (9) set in rotation by a drive member (5), the mixing arrangement (3) being fixed to the ring (9) and is set in rotation through the intermediary of a receiving pinion (17) meshing with a fixed wheel (15) connected to the central pipe (7). The invention will be used in particular for mixing wet or dry constituents such as concrete, silica sand and the like.
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