Cavitation nozzle assembly
First Claim
1. A cavitation nozzle assembly adapted to be connected to a source supplying liquid under superatmospheric pressure and for discharging a high velocity jet of said liquid with cavitation bubbles therein, said nozzle comprising inter alia;
- a supply chamber connectible to said source for receiving said liquid therefrom, said chamber including 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 interconnecting the divergent and convergent portions, said convergent portion being conical in form and converging to an apex so as to define an enclosed angle of about 65°
to 90°
; and
a discharge orifice at the apex of the convergent portion, and being circular in cross-section with a diameter in the range from about 1.2 mm to about 4.0 mm, said supply liquid undergoing expansion upon passage through said orifice such that cavitation bubbles form in the high velocity jet discharged therefrom.
2 Assignments
0 Petitions
Accused Products
Abstract
A cavitation nozzle assembly is described for discharging a high velocity 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 velocity 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°.
-
Citations
17 Claims
-
1. A cavitation nozzle assembly adapted to be connected to a source supplying liquid under superatmospheric pressure and for discharging a high velocity jet of said liquid with cavitation bubbles therein, said nozzle comprising inter alia;
-
a supply chamber connectible to said source for receiving said liquid therefrom, said chamber including 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 interconnecting the divergent and convergent portions, said convergent portion being conical in form and converging to an apex so as to define an enclosed angle of about 65°
to 90°
; anda discharge orifice at the apex of the convergent portion, and being circular in cross-section with a diameter in the range from about 1.2 mm to about 4.0 mm, said supply liquid undergoing expansion upon passage through said orifice such that cavitation bubbles form in the high velocity jet discharged therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15)
-
-
11. A cavitation nozzle assembly adapted to be connected to a source supplying liquid under superatmospheric pressure, and operable to discharge a high velocity jet of said liquid with cavitation bubbles therein, said nozzle assembly comprising, inter alia;
-
an inlet housing adapted to be connected to said source of liquid, and defining an inlet channel, an upstream portion of a chamber, divergent in a downstream direction and connected to the inlet channel, and a central section of the chamber, of generally constant cross-sectional area; a terminal housing of generally tubular form, having an open upstream end and a downstream end having radially inwardly extending flange means to define an exit for the high velocity jet, said terminal housing being secured to the inlet housing, said terminal housing also including liquid distribution means connectible to a supply of liquid at a pressure lower than that of said source and configured to provide a shroud of liquid surrounding said high velocity jet upon discharge from said nozzle assembly; and a disc-like nozzle element having a conically formed central portion configured to enclose an angle in the range of about 75°
to 85°
, said central portion converging to define a discharge orifice, with the nozzle element being releasably retained by the inlet and terminal housings and positioned such that the central portion of said nozzle element converges in a downstream direction. - View Dependent Claims (12, 13, 16, 17)
-
Specification