Fluid sprinkling – spraying – and diffusing – Flow deflecting or rotation controlling means – Fluid rotation inducing means upstream of outlet
Patent
1995-04-18
1997-06-17
Weldon, Kevin
Fluid sprinkling, spraying, and diffusing
Flow deflecting or rotation controlling means
Fluid rotation inducing means upstream of outlet
239491, 239570, B05B 134, A62C 3102
Patent
active
056390297
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a nozzle.
The object of the invention is to provide a new nozzle which in particular is suitable for use in such spray heads which are capable of operating at a high driving liquid pressure.
The nozzle according to the invention is mainly characterized by a helical spring arranged before the orifice of the nozzle in such a way that liquid is made to flow in a helical path between the loops of the spring, in order to set the liquid in a strong whirling motion before being discharged through the orifice.
Preferably the helical spring is positioned around a spindle element insertable into an at least essentially cylindrical passage in the housing of the nozzle.
As the operating pressure decreases, the spring expands gradually, whereat the pin follows along and is removed from its bottom position near the orifice of the nozzle. This results in a decreasing flow resistance before the nozzle orifice, partly because the distance increases between adjacent loops of the helical spring and the cross section of the helical flow path thus increases, and partly because the axial length of the helical path becomes shorter.
Thus the amount of discharged liquid per time unit will remain essentially constant in spite of variations in the operating pressure. In many cases it is of advantage to employ one or several hydraulic accumulators as drive unit for the liquid, whereat an essentially constant rate of liquid spray can be obtained in spite of a decreasing operating pressure as the hydraulic accumulators gradually are discharged.
In the following the invention shall be described in more detail with reference to the attached drawing which, by way of example, show a number of preferred embodiments.
FIG. 1 shows an axial section of a spray head with a first embodiment of nozzles according to the present invention.
FIGS. 2, 3 and 4 show in an enlargened scale an axial section of an individual nozzle of FIG. 1, under the influence of different liquid pressures.
FIG. 5 shows an axial section of a spray head with a second embodiment of nozzles according to the present invention.
FIGS. 6 and 7 show in an enlargened scale an axial section of the central nozzle of FIG. 5, under the influence of two different liquid pressures.
FIGS. 8 and 9 show in an enlargened scale an axial section of the side nozzles of FIG. 5, under the influence of two different liquid pressures.
FIGS. 10-14 show an alternative nozzle embodiment applied on a nozzle centrally arranged in the spray head, under the influence of different liquid pressures.
FIG. 15 shows nozzles according to FIGS. 1-4 mounted in a spray head provided with a release ampoule.
In the drawing the reference numeral 1 indicates a housing of a spray head with an inlet 2 for liquid, preferably of a high pressure, even up to about 300 bar. The inlet 2 continues as an axial channel 3 which in FIG. 1 leads to a centrally arranged nozzle 4 and from which lead branch channels 5 to side nozzles 6 directed obliquely outwards. The central nozzle 4 and the side nozzles 6 in FIG. 1 are a first preferred embodiment of the invention and shall in the following be described in more detail with reference to FIGS. 2, 3 and 4 which show a side nozzle 6.
The nozzle 6 has a body or holder 7 which by means of a thread 8 is screwed in a seat joining a branch channel 5 in the housing 1 of the spray head. Through the holder 7 runs a connection which, seen in the direction from the channel 5, has a cylindrical portion the wall of which is indicated by 9 and which ends at an annular stop 10, and a conically narrowing portion with a whirl chamber element 11 which defines a conically narrowing whirl chamber 12 and an orifice 13.
Between the inner en of the holder 7 and a stop 14 formed in the nozzle seat is arranged a filter, preferably a disc-like sintered metal filter 15 having a central opening through which is entered an end pin 16 of a spindle having a cylindrical portion 17 reaching into the cylindrical passage of the holder 7 and terminating in an end surface 18 matching the
REFERENCES:
patent: 551875 (1895-12-01), Schuffe
patent: 887302 (1908-05-01), Barnes
patent: 2017467 (1935-10-01), Loomis
patent: 2329711 (1943-09-01), Gilsenaj
patent: 2407915 (1946-09-01), Ball
patent: 2560799 (1951-07-01), Johnson
patent: 3684019 (1972-08-01), Emmons et al.
patent: 4655394 (1987-04-01), Ferrazza
LandOfFree
Nozzle with helical spring which sets liquid in whirling motion does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nozzle with helical spring which sets liquid in whirling motion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nozzle with helical spring which sets liquid in whirling motion will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2153060