CA2014779A1 - Flat-jet nozzle to atomize liquids into comparatively coarse drops - Google Patents
Flat-jet nozzle to atomize liquids into comparatively coarse dropsInfo
- Publication number
- CA2014779A1 CA2014779A1 CA002014779A CA2014779A CA2014779A1 CA 2014779 A1 CA2014779 A1 CA 2014779A1 CA 002014779 A CA002014779 A CA 002014779A CA 2014779 A CA2014779 A CA 2014779A CA 2014779 A1 CA2014779 A1 CA 2014779A1
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- inset
- discharge
- flat
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 238000003801 milling Methods 0.000 claims abstract description 15
- 210000003323 beak Anatomy 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 7
- 238000001228 spectrum Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000370685 Arge Species 0.000 description 1
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/048—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like having a flow conduit with, immediately behind the outlet orifice, an elongated cross section, e.g. of oval or elliptic form, of which the major axis is perpendicular to the plane of the jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet
Abstract
ABSTRACT
The invention concerns a flat-jet nozzle for atomizing liquids into comparatively large drops and comprising a nozzle housing with an axial feed passing through it with a severally stepped diameter, this feed being provided at its end with a discharge geometry with a prismatic milling serving as the nozzle discharge slit. Moreover an inset with a central throttling bore is mounted in the liquid feed between the liquid intake and the discharge geometry.
A cylindrical central zone (differential pressure chamber) of a larger diameter than the discharge geometry's is present in the liquid feed in the nozzle housing. The inset is provided with deflecting means through which the liquid jet issuing from the throttling bore into the central zone is forced, preferably bilaterally, toward the large axis of the nozzle discharge slit.
The stated features make it possible to atomize a liquid at low pressure, for instance in the range of 1 to 5 bars while nevertheless retaining highly uniform liquid distribution and a large jet angle.
The invention concerns a flat-jet nozzle for atomizing liquids into comparatively large drops and comprising a nozzle housing with an axial feed passing through it with a severally stepped diameter, this feed being provided at its end with a discharge geometry with a prismatic milling serving as the nozzle discharge slit. Moreover an inset with a central throttling bore is mounted in the liquid feed between the liquid intake and the discharge geometry.
A cylindrical central zone (differential pressure chamber) of a larger diameter than the discharge geometry's is present in the liquid feed in the nozzle housing. The inset is provided with deflecting means through which the liquid jet issuing from the throttling bore into the central zone is forced, preferably bilaterally, toward the large axis of the nozzle discharge slit.
The stated features make it possible to atomize a liquid at low pressure, for instance in the range of 1 to 5 bars while nevertheless retaining highly uniform liquid distribution and a large jet angle.
Description
2t~
LOTHER BENDIG, ULRICH ALLGAIER, and HELMUT WENZEL
FI~T-JET NOZZLE TO ATOMIZE LIQVIDS INTO COMPARATIVELY COARSE
DROPS
The invention concerns a flat-jet nozzle defined in the preamble of claim l.
When atomizing plant protectants with ~ow discharge rates, lubricant oils and other substances which because of their toxicity may endanger the environment, it is necessary to prevent drifts into areas not to be sprayed. The danger of the atomized liquid driftins inherently increases the smaller the drop size. When atomizing liquid~ in the above applications, it is necessary therefore to achieve a fairly coarse drop spectrum. On the other hand uniform spraying of the intended areas demands as uniform a liquid distribution as possible.
The insight of the present state of the art is that the drop spectrum generated by a flat-jet nozzle shall be the finer the smaller the nozzle and hence the discharge rate.
This means that when atomizing small amounts of ecologically stressful substances, the danger of small drops drifting will be real. As already indicated, such undesired drifting practically takes place foremost when highly concentrated plant protectants are discharged, and in particular when applying lubricant oils.
~- 2 ~ A further relation exists in that the drop spectrum of a single nozzle becomes finer as the pressure increases.
29~477~
Accordingly if the drop sizes are to be increased, the lowest pressure and the largest nozzle should be selected. While it is possible in this manner to achieve -- to some extent -- a coarse drop spectrum, there is failure on the other hand to meet the equally important requirement of uniform liquid distribution.
The US patent 3,858,812 discloses a flat-jet nozzle of the initially cited kind and designed for low pressures. This known nozzle comprises a stepped liquid-guide means (borehole) which however assumes an oval shape at the liquid intake in order to affect the liquid distribution. In one embodiment mode this feature is implemented by means of a pane with oval borehole pressed into the nozzle. The purpose of this intake geometry is to correct a liquid distribution with excess emphasis on the edges. The large axis of the borehole oval is perpendicular to the large axis of the discharge slit, whereby the liguid is forced away from the edges and is more concentrated toward the center.
The oval borehole in the pane-like inset of the known nozzle lacks a throttling effect on the volumetric flow, at least it is not explicitly intended. As a result, the known features of US patent 3 8~8 812 do not allow significantly controlling the drop spectrum in the sense of the desired increase in drop size.
Based on the stated art, it is the object of the present invention to create a flat-jet nozzle capable of atomizing a liquid at low pressures, preferably in the range between 1 and 5 bars, so as to form coarse drops, while retaining highly uniform distribution of liquid.
In the invention, this object is achieved for a flat-jet nozzle of the initially cited kind ~y the features stated in the characterizing part of claim 1.
~~3~ While the European patent document 0037 747 Al discloses 26~47~79 an inset for the purpose of throttling the liquid flow, this design -- which deviates from the species of the present invention -- concerns a triple-hole nozzle. In other words, S the known nozzle comprises three cylindrical boreholes to generate three sol id j ets of which the diameters are determined solely by the size of the discharge bore. Moreover the purpose of the inset in the known nozzle i~ merely to restrict thé most narrow cross-section of the nozzle to a single borehole for reasons of wear palliation.
As regards the flat-jet nozzle of the invention on the other hand, the pressure is throttled by an inset ahead of the nozzle discharge slit and simultaneously the liquid jet is so expanded toward the large axis of the discharge slit that the liquid is forced into edge zones of the discharge slit.
There, at the discharge edges, the liquid is much deflected by detachment (eddying), and as a result a large jet angle is produced. Accordingly the invention achieves a coarse drop spectrum (because of the low pressure in the nozzle) at equal jet angle and uniform liquid distribution.
Easy manufacture and assembly of the nozzle follows from a development of the invention stated in claim 2.
Claim 3 discloses a preferred embodiment mode of the invention. Conceivable alternative solutions for this embodiment mode are defined in claims 4 through 6.
Further advantageous embodiments of the invention are defined in claims 7 through 9.
~llustrative embodiments shown in the drawings and described below serve to elucidate the invention.
~0 Fig. ~ is a vertical longitudinal section of an embodiment mode of a flat-jet nozzle of the invention, Fig. 2 is a topview of the inset of the nozzle of Fig. ~, Fig~. 3 through 5 are sections corresponding to Fig. l of further embodiment modes of the invention, `~~ Fig. 6 is a plot of the mean drop size made possible by the flat-je~ nozzles of the invention, for instance according to Figs. 1 through 5,- as a function of the nozzle intake pressure.
In Figs. 1 and 3 through 5, 10 denotes a cylindrical nozzle housing with a continuous, center liquid feed 11 which is stepped several times. The liquid feed 11 starts at the upper end o~ the nozzle housing 11, at the liquid intake 12, having a maximum diameter in the zone 13, this diameter passing stepwise in the direction of flow 14 into a central zone 15 of lesser diameter. The central zone 15 is followed coaxially by a so-called discharge geometry 16 evincing a diameter even less than the central zone 15 of the liquid feed ~'' 11. The discharge geometry 16 consists of a cylindrical lS segment 17 and of a following, as seen in the direction of flow 14, adjoining terminal segment 18 of approximate spherical shape. Two side clearances 19, 20 and a prismatic milling 21 are present at the lower end of the nozzle housing 10. The prismatic milling 21 intersects the discharge geometry 16 and forms the nozzle discharge.
A cylindrical inset denoted as a whole by 22 is mounted in the upper zone 13 of the liquid feed 11 of Figs. 1 and 2 and comprises a central throttling bore 23 determining the volumetric flow through the nozzle. A slotted milling 24 ~the so-called functional prismatic milling) is present at the lower side of the inset 22 and intersects the throttling bore 23. The functional prismatic milling 24 is parallel to the nozzle disc~arge slit 21. Another slotted milling 25 is present in the inset 22 at the top and also intersects the throttling bore 23~ As shown by Fig. 2, the second slotted milling 25 is orthogonal to the functional prismatic milling 24.
The above described alignment of the slotted millings 24, 25 relative to the nozzle discharge slit 21 requires a -5- corresponding assembly position of the inset 22 in the2nQz1 le housing lO. For that purpose the inset lO is provided with a side beak 26 matching a corresponding clearance 27 in the nozzle housing lO.
Furthermore a clearance 28 is present in the nozzle housing lO and is associated with a clearance 29 in the inset 22. The clearances 28, 29 are used to assemble and disassemble the inset 22 using suitable tools.
By means of the said elements, namely the beak 26 at the inset 22 and the clearance 27 in the nozzle housing 10, both accurate positioning of the inset 22 and its irrotational seating in the nozzle housing 10 are assured. However, as an alternative, the inset 22 also may be press-fitted into the nozzle housing 10. In that event elements 26 through 29 may be eliminated.
on account of the two mutually orthogonal slotted millings 24 and 25, the inset 22 is endowed with the function of a flat-jet nozzle. In other words, the throttled liquid jet passing from the throttling bore 23 into the lower milling 24 of the inset 22 is expanded toward the large axis of the nozzle discharge slit 21 and as such arrives into the central zone 15 of the liquid feed 11. Whereas the throttling achieves a commensurately lower pressure ar.d thereby the physical pre-condition for making coarse drops, the said expansion of the liquid jet provides the condition for a large jet angle with uniformly distributed jet of liquid at the nozzle discharge slit 2~.
The above described effect of the invention is enhanced if the nozzle per se, that is without the inset 22, evinces a liquid distribution bunching at the center.
The nozzle of Fig. 3 differs from the above embodiment mode of Figs. l and 2 by a different structure of the inset denoted in Fig. 3 by 22a. The inset 22a comprises at its lower ,~,....
end a journal-like extension 30 with a frustoconical impact ~:~147~9 -6 disk 31 at its lower end. The throttling bore 23 passing through the inset 22a and expanding at its lower end is divided by this frustoconical impact disk 31 into two diverging, partial bores 32 and 33. The partial bores 32, 33 and correspondingly the partial liquid flows passing through them are aligned toward the large axis of the nozzle discharge slit 21. The function of t~e inset 22a of Fig. 3 essentially corresponds,to that of the inset 22 of Fig. 1.
In the embodiment mode of Fig. 4, the inset is denoted by 22b. The specialty here is that a plane impact disk 34 follows the throttling bore 23 b as seen in the direction of flow. Again the function in this case corresponds to that of Figs. 1 through 3 ~see above).
In the embodiment shown in Fig. 5, the inset denoted therein by 22c is special in that the throttling bore 23c coaxial with the liquid feed 11 issues by its discharge end inside the inset 22c into a continuous cross-bore 35. By - means of the cross-bore 35 pointing toward the large axis of the nozzle discharge slit 21, the liquid jet is deflected at right angles in both directions and split in two. The function of these deflecting means corresponds to that of the deflecting means of the embodiment modes of Fi~s~ 1 through 4.
Fig. 6 is a plot of the coars~ drop spectrum which is made possible by the nozzle of the invention, for instance by means of the embodiments of Figs. 1 through 5. The mean drop diameter -- the so-called Sauter diameter -- is shown in microns against the nozzle intake pressure in bars. ~he characteristic of the nozzle of the invention is shown by the upper, thick solid curve. (The Sauter diameter is the mean value characterizing the ratio of drop volume to drop surface).
For comparison, the plot shows a dashed line representing the characteristic of a ~'normal" flat-jet nozzle without the inset of the invention. The advantages offered by the nozzle _~ 2~ ~7g . .
of the invention are made especially clear thereby. As a result, an increase of the mean drop diameter of about 70 % is made possible by the invention.
~ .,
LOTHER BENDIG, ULRICH ALLGAIER, and HELMUT WENZEL
FI~T-JET NOZZLE TO ATOMIZE LIQVIDS INTO COMPARATIVELY COARSE
DROPS
The invention concerns a flat-jet nozzle defined in the preamble of claim l.
When atomizing plant protectants with ~ow discharge rates, lubricant oils and other substances which because of their toxicity may endanger the environment, it is necessary to prevent drifts into areas not to be sprayed. The danger of the atomized liquid driftins inherently increases the smaller the drop size. When atomizing liquid~ in the above applications, it is necessary therefore to achieve a fairly coarse drop spectrum. On the other hand uniform spraying of the intended areas demands as uniform a liquid distribution as possible.
The insight of the present state of the art is that the drop spectrum generated by a flat-jet nozzle shall be the finer the smaller the nozzle and hence the discharge rate.
This means that when atomizing small amounts of ecologically stressful substances, the danger of small drops drifting will be real. As already indicated, such undesired drifting practically takes place foremost when highly concentrated plant protectants are discharged, and in particular when applying lubricant oils.
~- 2 ~ A further relation exists in that the drop spectrum of a single nozzle becomes finer as the pressure increases.
29~477~
Accordingly if the drop sizes are to be increased, the lowest pressure and the largest nozzle should be selected. While it is possible in this manner to achieve -- to some extent -- a coarse drop spectrum, there is failure on the other hand to meet the equally important requirement of uniform liquid distribution.
The US patent 3,858,812 discloses a flat-jet nozzle of the initially cited kind and designed for low pressures. This known nozzle comprises a stepped liquid-guide means (borehole) which however assumes an oval shape at the liquid intake in order to affect the liquid distribution. In one embodiment mode this feature is implemented by means of a pane with oval borehole pressed into the nozzle. The purpose of this intake geometry is to correct a liquid distribution with excess emphasis on the edges. The large axis of the borehole oval is perpendicular to the large axis of the discharge slit, whereby the liguid is forced away from the edges and is more concentrated toward the center.
The oval borehole in the pane-like inset of the known nozzle lacks a throttling effect on the volumetric flow, at least it is not explicitly intended. As a result, the known features of US patent 3 8~8 812 do not allow significantly controlling the drop spectrum in the sense of the desired increase in drop size.
Based on the stated art, it is the object of the present invention to create a flat-jet nozzle capable of atomizing a liquid at low pressures, preferably in the range between 1 and 5 bars, so as to form coarse drops, while retaining highly uniform distribution of liquid.
In the invention, this object is achieved for a flat-jet nozzle of the initially cited kind ~y the features stated in the characterizing part of claim 1.
~~3~ While the European patent document 0037 747 Al discloses 26~47~79 an inset for the purpose of throttling the liquid flow, this design -- which deviates from the species of the present invention -- concerns a triple-hole nozzle. In other words, S the known nozzle comprises three cylindrical boreholes to generate three sol id j ets of which the diameters are determined solely by the size of the discharge bore. Moreover the purpose of the inset in the known nozzle i~ merely to restrict thé most narrow cross-section of the nozzle to a single borehole for reasons of wear palliation.
As regards the flat-jet nozzle of the invention on the other hand, the pressure is throttled by an inset ahead of the nozzle discharge slit and simultaneously the liquid jet is so expanded toward the large axis of the discharge slit that the liquid is forced into edge zones of the discharge slit.
There, at the discharge edges, the liquid is much deflected by detachment (eddying), and as a result a large jet angle is produced. Accordingly the invention achieves a coarse drop spectrum (because of the low pressure in the nozzle) at equal jet angle and uniform liquid distribution.
Easy manufacture and assembly of the nozzle follows from a development of the invention stated in claim 2.
Claim 3 discloses a preferred embodiment mode of the invention. Conceivable alternative solutions for this embodiment mode are defined in claims 4 through 6.
Further advantageous embodiments of the invention are defined in claims 7 through 9.
~llustrative embodiments shown in the drawings and described below serve to elucidate the invention.
~0 Fig. ~ is a vertical longitudinal section of an embodiment mode of a flat-jet nozzle of the invention, Fig. 2 is a topview of the inset of the nozzle of Fig. ~, Fig~. 3 through 5 are sections corresponding to Fig. l of further embodiment modes of the invention, `~~ Fig. 6 is a plot of the mean drop size made possible by the flat-je~ nozzles of the invention, for instance according to Figs. 1 through 5,- as a function of the nozzle intake pressure.
In Figs. 1 and 3 through 5, 10 denotes a cylindrical nozzle housing with a continuous, center liquid feed 11 which is stepped several times. The liquid feed 11 starts at the upper end o~ the nozzle housing 11, at the liquid intake 12, having a maximum diameter in the zone 13, this diameter passing stepwise in the direction of flow 14 into a central zone 15 of lesser diameter. The central zone 15 is followed coaxially by a so-called discharge geometry 16 evincing a diameter even less than the central zone 15 of the liquid feed ~'' 11. The discharge geometry 16 consists of a cylindrical lS segment 17 and of a following, as seen in the direction of flow 14, adjoining terminal segment 18 of approximate spherical shape. Two side clearances 19, 20 and a prismatic milling 21 are present at the lower end of the nozzle housing 10. The prismatic milling 21 intersects the discharge geometry 16 and forms the nozzle discharge.
A cylindrical inset denoted as a whole by 22 is mounted in the upper zone 13 of the liquid feed 11 of Figs. 1 and 2 and comprises a central throttling bore 23 determining the volumetric flow through the nozzle. A slotted milling 24 ~the so-called functional prismatic milling) is present at the lower side of the inset 22 and intersects the throttling bore 23. The functional prismatic milling 24 is parallel to the nozzle disc~arge slit 21. Another slotted milling 25 is present in the inset 22 at the top and also intersects the throttling bore 23~ As shown by Fig. 2, the second slotted milling 25 is orthogonal to the functional prismatic milling 24.
The above described alignment of the slotted millings 24, 25 relative to the nozzle discharge slit 21 requires a -5- corresponding assembly position of the inset 22 in the2nQz1 le housing lO. For that purpose the inset lO is provided with a side beak 26 matching a corresponding clearance 27 in the nozzle housing lO.
Furthermore a clearance 28 is present in the nozzle housing lO and is associated with a clearance 29 in the inset 22. The clearances 28, 29 are used to assemble and disassemble the inset 22 using suitable tools.
By means of the said elements, namely the beak 26 at the inset 22 and the clearance 27 in the nozzle housing 10, both accurate positioning of the inset 22 and its irrotational seating in the nozzle housing 10 are assured. However, as an alternative, the inset 22 also may be press-fitted into the nozzle housing 10. In that event elements 26 through 29 may be eliminated.
on account of the two mutually orthogonal slotted millings 24 and 25, the inset 22 is endowed with the function of a flat-jet nozzle. In other words, the throttled liquid jet passing from the throttling bore 23 into the lower milling 24 of the inset 22 is expanded toward the large axis of the nozzle discharge slit 21 and as such arrives into the central zone 15 of the liquid feed 11. Whereas the throttling achieves a commensurately lower pressure ar.d thereby the physical pre-condition for making coarse drops, the said expansion of the liquid jet provides the condition for a large jet angle with uniformly distributed jet of liquid at the nozzle discharge slit 2~.
The above described effect of the invention is enhanced if the nozzle per se, that is without the inset 22, evinces a liquid distribution bunching at the center.
The nozzle of Fig. 3 differs from the above embodiment mode of Figs. l and 2 by a different structure of the inset denoted in Fig. 3 by 22a. The inset 22a comprises at its lower ,~,....
end a journal-like extension 30 with a frustoconical impact ~:~147~9 -6 disk 31 at its lower end. The throttling bore 23 passing through the inset 22a and expanding at its lower end is divided by this frustoconical impact disk 31 into two diverging, partial bores 32 and 33. The partial bores 32, 33 and correspondingly the partial liquid flows passing through them are aligned toward the large axis of the nozzle discharge slit 21. The function of t~e inset 22a of Fig. 3 essentially corresponds,to that of the inset 22 of Fig. 1.
In the embodiment mode of Fig. 4, the inset is denoted by 22b. The specialty here is that a plane impact disk 34 follows the throttling bore 23 b as seen in the direction of flow. Again the function in this case corresponds to that of Figs. 1 through 3 ~see above).
In the embodiment shown in Fig. 5, the inset denoted therein by 22c is special in that the throttling bore 23c coaxial with the liquid feed 11 issues by its discharge end inside the inset 22c into a continuous cross-bore 35. By - means of the cross-bore 35 pointing toward the large axis of the nozzle discharge slit 21, the liquid jet is deflected at right angles in both directions and split in two. The function of these deflecting means corresponds to that of the deflecting means of the embodiment modes of Fi~s~ 1 through 4.
Fig. 6 is a plot of the coars~ drop spectrum which is made possible by the nozzle of the invention, for instance by means of the embodiments of Figs. 1 through 5. The mean drop diameter -- the so-called Sauter diameter -- is shown in microns against the nozzle intake pressure in bars. ~he characteristic of the nozzle of the invention is shown by the upper, thick solid curve. (The Sauter diameter is the mean value characterizing the ratio of drop volume to drop surface).
For comparison, the plot shows a dashed line representing the characteristic of a ~'normal" flat-jet nozzle without the inset of the invention. The advantages offered by the nozzle _~ 2~ ~7g . .
of the invention are made especially clear thereby. As a result, an increase of the mean drop diameter of about 70 % is made possible by the invention.
~ .,
Claims (9)
1. A flat-jet nozzle to atomize liquids into comparatively coarse drops, comprising a nozzle housing with a continuous liquid feed evincing stepped diameters and provided at its end with a discharge geometry with a prismatic milling as the nozzle discharge slit, and further comprising an inset present in the liquid feed between the liquid intake and the discharge geometry and having a throttling bore, characterized in that the liquid feed (11) comprises a cylindrical central zone (15) (differential pressure chamber) in the nozzle housing (10) between the inset (22, 22a, 22b, 22c) and the discharge geometry (16) and evincing a larger diameter than the discharge geometry (16), and in that the inset (22, 22a, 22b, 22c) is equipped with deflection means (25, 24 and 31 through 33 and 34 and 35 resp.) through which the liquid jet issuing from the throttling bore (22, 22a, 22b, 22c) into the central zone (15) can be forced -- preferably bilaterally -- toward the large axis of the nozzle exit slit (21).
2. Flat-jet nozzle defined in claim 1, characterized in that the cylindrical inset (22, 22a, 22b, 22c) is mounted immediately at the (upper) intake-side end (12) of the nozzle housing (10) in a corresponding cylindrical clearance (13) of the liquid feed (11).
3. Flat-jet nozzle defined in either of claims 1 and 2, characterized in that the inset (22) comprises at both ends of its throttling bore (23) one prismatic milling each (25 and 24) acting as deflection means and being orthogonal or essentially orthogonal to each other, and in that the discharge-side milling (24) points in the direction of the large axis of the nozzle discharge slit (21) -- see Figs. 1 and 2.
4. Flat-jet nozzle defined in either of claims 1 and 2, characterized in that the nozzle discharge-side end of the throttling bore (23) is expanded and in that the inset (22a) comprises there a central impact disk (31) of frustoconical longitudinal section dividing the throttling bore (23a) and correspondingly the impinging liquid into two partial bores (32, 33) and resp. liquid partial streams diverging in the direction of the large axis of the nozzle discharge slit (21) -- see Fig. 3.
5. Flat-jet nozzle defined in either of claims 1 and 2, characterized in that the inset (22b) serving as a deflection means comprises a plane impact disk (34) following the throttling bore (23b) as seen in the direction of discharge (Fig. 4).
6. Flat-jet nozzle defined in either of claims 1 and 2, characterized in that the throttling bore (23c) coaxial with the liquid feed (11) issues by its discharge-side end inside the inset (22c) into a continuous cross-bore (35) and in that the cross-bore (35) points toward the large axis of the nozzle discharge slit (21) -- see Fig. 5.
7. Flat-jet nozzle defined in one or more of the above claims, characterized in that the inset (22, 22a, 22b, 22c) comprises an integral beak (26) which when the inset is in the assembly position shall enter a corresponding lateral clearance (27) in the nozzle housing (10).
8. Flat-jet nozzle defined in one or more of claims 1 through 6, characterized in that the inset is press-fitted into its assembly zone (13) in the liquid feed (11).
9. Flat-jet nozzle defined in one or more of the above claims, characterized in that the inset (22, 22a, 22b, 22c) comprises a first clearance (29) which where called for is present diametrically to the beak (26) and which corresponds to a second clearance (28) present at the same site in the nozzle housing (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3914551A DE3914551C1 (en) | 1989-05-03 | 1989-05-03 | |
| DEP3914551.4 | 1989-05-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2014779A1 true CA2014779A1 (en) | 1990-11-03 |
Family
ID=6379970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002014779A Abandoned CA2014779A1 (en) | 1989-05-03 | 1990-04-18 | Flat-jet nozzle to atomize liquids into comparatively coarse drops |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5133502A (en) |
| AU (1) | AU631193B2 (en) |
| CA (1) | CA2014779A1 (en) |
| DE (1) | DE3914551C1 (en) |
| DK (1) | DK108890A (en) |
| FR (1) | FR2646617A1 (en) |
| GB (1) | GB2230976B (en) |
| HU (1) | HU205031B (en) |
| IT (1) | IT1239514B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246166A (en) * | 1991-09-30 | 1993-09-21 | Her Majesty The Queen In The Right Of Canada As Represented By The Minister Of Forestry | Spraying apparatus |
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| US5271566A (en) * | 1992-10-21 | 1993-12-21 | D. B. Smith & Company, Inc. | Self-orienting spray nozzle system |
| US5622489A (en) * | 1995-04-13 | 1997-04-22 | Monro; Richard J. | Fuel atomizer and apparatus and method for reducing NOx |
| US5642860A (en) * | 1995-07-07 | 1997-07-01 | The Procter & Gamble Company | Pump sprayer for viscous or solids laden liquids |
| US5639025A (en) * | 1995-07-07 | 1997-06-17 | The Procter & Gamble Company | High Viscosity pump sprayer utilizing fan spray nozzle |
| US5890655A (en) * | 1997-01-06 | 1999-04-06 | The Procter & Gamble Company | Fan spray nozzles having elastomeric dome-shaped tips |
| US6029746A (en) * | 1997-07-22 | 2000-02-29 | Vortech, Inc. | Self-excited jet stimulation tool for cleaning and stimulating wells |
| US6470980B1 (en) | 1997-07-22 | 2002-10-29 | Rex A. Dodd | Self-excited drill bit sub |
| CA2308507C (en) * | 1997-11-14 | 2012-01-10 | Concast Standard Ag | Slit nozzle for spraying a continuous casting product with a cooling liquid |
| EP1059122A1 (en) | 1999-06-07 | 2000-12-13 | The Procter & Gamble Company | A spray device with flat fan nozzle |
| US6762335B1 (en) | 2000-02-29 | 2004-07-13 | Fina Technology, Inc. | Apparatus for dehydrogenation of ethylbenzene to styrene |
| DE102004040802A1 (en) * | 2004-08-23 | 2006-03-09 | Daimlerchrysler Ag | Atomizing device for testing vehicle contamination in wind tunnel, has spray nozzle with one unit for producing heterogeneous atomized spray including liquid drops with variable sizes |
| DE102005047195B3 (en) * | 2005-09-23 | 2007-06-06 | Lechler Gmbh | Solid cone spray nozzle |
| US7584908B2 (en) * | 2005-10-27 | 2009-09-08 | Sta-Rite Industries, Llc | Spray nozzle apparatus and method |
| US20100224122A1 (en) * | 2009-03-09 | 2010-09-09 | Illinois Tool Works Inc. | Low pressure regulation for web moistening systems |
| US9186881B2 (en) | 2009-03-09 | 2015-11-17 | Illinois Tool Works Inc. | Thermally isolated liquid supply for web moistening |
| CN103447181B (en) * | 2013-09-05 | 2015-12-02 | 李先强 | Long spray head of agricultural atomizer |
| CN103934129A (en) * | 2013-11-21 | 2014-07-23 | 张文艳 | Pressure water atomization device |
| FR3107659B1 (en) | 2020-02-28 | 2022-06-24 | Solcera | Flat fan, low drift spray nozzle. |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1863914A (en) * | 1931-02-16 | 1932-06-21 | Tyler Jerry | Vegetable spraying device |
| US2522928A (en) * | 1947-11-18 | 1950-09-19 | Monarch Mfg Works Inc | Spraying nozzle |
| US2774631A (en) * | 1952-06-11 | 1956-12-18 | Spraying Systems Co | Two-part orifice spray nozzle and method of making same |
| FR1142824A (en) * | 1956-03-07 | 1957-09-23 | Fabre Ulysse Ets | Adaptable advanced nozzle |
| US3447757A (en) * | 1967-02-28 | 1969-06-03 | Lucas Industries Ltd | Spray nozzles |
| US3858812A (en) * | 1973-11-23 | 1975-01-07 | Spraying Systems Co | Spray nozzle for low pressure spray and uniform spray pattern |
| US4097000A (en) * | 1975-07-07 | 1978-06-27 | Derr Bernard A | Spray nozzle |
| US4128206A (en) * | 1977-05-31 | 1978-12-05 | Delavan Corporation | Low drift flat spray nozzle and method |
| US4380319A (en) * | 1978-01-16 | 1983-04-19 | Edward A. Sokolski | Liquid spray nozzle |
| FR2477038A1 (en) * | 1980-02-28 | 1981-09-04 | Carbonisation Entr Ceram | Fungicide liquid spray nozzle - has throttle disc with concave inlet face fixed to two-part nozzle |
| FR2477039A1 (en) * | 1980-02-28 | 1981-09-04 | Carbonisation Entr Ceram | SPRAY NOZZLE, IN PARTICULAR FOR FERTILIZERS |
| SU1009516A1 (en) * | 1981-03-27 | 1983-04-07 | Волжский Научно-Исследовательский Институт Гидротехники И Мелиорации | Sprinkling nozzle |
| US4655395A (en) * | 1984-04-17 | 1987-04-07 | The Babcock & Wilcox Company | Adjustable conical atomizer |
-
1989
- 1989-05-03 DE DE3914551A patent/DE3914551C1/de not_active Expired - Fee Related
-
1990
- 1990-03-30 IT IT19896A patent/IT1239514B/en active IP Right Grant
- 1990-04-18 US US07/510,630 patent/US5133502A/en not_active Expired - Fee Related
- 1990-04-18 CA CA002014779A patent/CA2014779A1/en not_active Abandoned
- 1990-04-20 HU HU902495A patent/HU205031B/en not_active IP Right Cessation
- 1990-04-26 GB GB9009413A patent/GB2230976B/en not_active Expired - Fee Related
- 1990-04-30 FR FR9005474A patent/FR2646617A1/en not_active Withdrawn
- 1990-05-01 AU AU54579/90A patent/AU631193B2/en not_active Ceased
- 1990-05-02 DK DK108890A patent/DK108890A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246166A (en) * | 1991-09-30 | 1993-09-21 | Her Majesty The Queen In The Right Of Canada As Represented By The Minister Of Forestry | Spraying apparatus |
| US5443210A (en) * | 1991-09-30 | 1995-08-22 | Her Majesty The Queen In The Right Of Canada, As Represented By The Minister Of Energy, Mines, Resources And Forestry | Spraying apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| HU902495D0 (en) | 1990-08-28 |
| US5133502A (en) | 1992-07-28 |
| HU205031B (en) | 1992-03-30 |
| DK108890D0 (en) | 1990-05-02 |
| AU5457990A (en) | 1990-11-08 |
| DK108890A (en) | 1990-11-04 |
| FR2646617A1 (en) | 1990-11-09 |
| IT1239514B (en) | 1993-11-03 |
| GB2230976A (en) | 1990-11-07 |
| GB9009413D0 (en) | 1990-06-20 |
| GB2230976B (en) | 1993-02-24 |
| DE3914551C1 (en) | 1990-11-15 |
| IT9019896A1 (en) | 1990-11-04 |
| HUT54077A (en) | 1991-01-28 |
| IT9019896A0 (en) | 1990-03-30 |
| AU631193B2 (en) | 1992-11-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |