B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
299/14
B05B 1/00 (2006.01) B05B 1/34 (2006.01) B05B 13/00 (2006.01) B05B 17/04 (2006.01) B24C 5/02 (2006.01) E02F 3/92 (2006.01)
Patent
CA 1128582
ABSTRACT OF THE DISCLOSURE A cavitation nozzle assembly is described for discharging a high veolcity jet of liquid with cavitation bubbles therein. The nozzle assembly includes a supply chamber having an upstream portion divergent in a downstream direction, a downstream portion convergent in the downstream direction, and a central section of generally constant cross-sectional area. The convergent portion is conical in form and encloses an angle of about 65° - 90 , more preferably 75° to 85° and optimally about 80°. The convergent portion converges to a discharge orifice having a circular cross-section with a diameter in the range from about 1.2 mm to about 4.0 mm. In a more preferred form, liquid distribution means are provided adjacent to the discharge orifice, configured to produce a shroud of said liquid at low pressure surrounding the high velo- city jet. In another preferred embodiment, the central section of the supply chamber has a diameter from about 12 mm to about 50 mm. Still more preferably, the convergent portion and discharge orifice are provided in a disc-like nozzle element, preferably releasably secured to define a downstream end of the supply chamber. In yet another preferred embodiment the nozzle element has a plurality of said discharge orifices. In a further preferred embodiment positioning means are provided to abut a surface being treated, and causing the high velocity jet to impinge the surface at an angle from about 30° to about 60°.
350120
Aspila Kalevi P.
Her Majesty The Queen In Right Of Canada As Represented By The M
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