| 摘要 |
The present invention relates to a multi-jet (11) rotary nozzle (1) for the spraying of very fine abrasive particles (particle-size distribution ranging from 0 to 200 microns) having multiple acceleration conduit sections (4), comprising a body of revolution mounted on a rolling bearing (2) and comprising, in the direction of movement of the particles, a central bore (7) coaxial with the axis of revolution of the nozzle (1), this bore (7) branching out into a series of conduits (4), the direction of which makes an acute angle, at a given location, with the longitudinal axis of the nozzle (1) and the cross-section of which is firstly substantially constant (4) and then, subsequently, increases substantially in the direction of movement of the particles before emerging on the face (10) for spraying the particles. The multi-jet rotary nozzle finds its application particularly in the cleaning of façade-wall stone and for equipping the arm of a robot. <IMAGE>
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