US 2551538 A
Description (OCR text may contain errors)
May L 3511 w. E. HENSEL 2,551,538
MULTIPLE JET SPRAY NOZZLE Filed Jan. 8, 1948 INVENTOR.
VVQH'e-r E Hensef HMM! MTM Patented May 1, 1951 iJNl'IED STATES .PATENT OFFICE MULTIPLE JET SPRAY NOZZLE Walter E. Hensel, South Berwick, Maine Application January 8, 1948, Serial No. 1,176
1 Claim. l
This invention relates to a multiple jet spraying apparatus designed to deliver a plurality of jets of liquid in spray form.
The apparatus is adapted for a wide variety of uses among which may be mentioned that of applying emulsion, oils, or other conditioning liquid in spray form to fibrous material such as wool, cotton, jute, hemp, etc., during the processing of such material. v
It is a commonpractice to condition fibrous material such as above referred to by spraying it with a conditioning liquid While it is being carried forward on a traveling apron and the apparatus herein described is admirably suited for this purpose.
It is an object of the invention to provide a multiple jet spraying apparatus which is simple in its construction and is inexpensive to manufacture, and which will produce a plurality of sprays each of which delivers the conditioning liquid in atomized form uniformly over a relatively large area.
In order to give an understanding of the invention, I have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel features will be pointed out in the appended claim.
In the drawings,
Fig. 1 is a fragmentary sectional view of a spraying apparatus embodying the invention.
Fig. 2 is a fragmentary under side view.
Fig. 3 is a vertical section through Fig. 1.
Fig. 4 is a cross sectional view showing a different form of nozzle from that illustrated in Figs. 1 to 3.
The improved spraying apparatus comprises a liquid-containing chamber I, herein shown in the form of a tube, which is connected to any suitable source of liquid supply from which liquid may be delivered to the tube l. Said tube I has a smooth exterior surface and is provided along its bottom with a plurality of cylindrical openings 4.
Situated entirely Within the tube l, which will for convenience be referred to as the outer tube, is an inner tube 2 which is connected to a suitable source of gaseous fluid under pressure such, for instance, as air or steam.
The inner tube 2 is provided with a plurality of nozzles, one for each opening 4 in the outer tube, and each nozzle 3 extends axially through the corresponding opening l of the outer tube and projects slightly beyond the outer smooth surface of said outer tube and has a delivery opening of uniform diameter as clearly shown in Figs. 1, 3
and 4. The portion of each nozzle 3 that occupies its opening fl is cylindrical externally and has an exterior diameter somewhat less than the diameter of the opening 4 and as each nozzle 3 projects entirely through its opening li, the space between the exterior of each nozzle 3 and the wall of the opening 4 constitutes an annular port having parallel inner and outer walls through which the liquid in the outer tube l may be discharged. Such liquid will, therefore, be delivered from the outer tube l in the form of a tubular stream surrounding the nozzle 3.
Since the inner tube 2 is filled with gaseous fluid under pressure, a jet of such compressed fluid, whether it be air or steam or any other gaseous fluid, will issue from each nozzle 3, and as soon as the stream of gaseous fluid emerges from the end of the nozzle, it will naturally expand laterally.
As the tubular stream of liquid moves over the exterior of the nozzle 3 and reaches the end of the nozzle, the expanding action of the jet of gaseous fluid which is being delivered from the nozzle into the interior of the tubular stream of liquid expands said tubular liquid stream radially and breaks it up into a fine spray which is deu livered radially and over a relatively Wide area.
It is to be noted that the action of the compressed air or steam or other gaseous uid under pressure does not act on the liquid until after such liquid has been discharged from the liquidcontaining chamber l, because of the fact that each nozzle 3 extends entirely through its opening 4 and projects a distance beyond the outer face of the tube l.
The delivering of the jet of compressed air or steam into the interior of a tubular stream of liquid which is uncomined exteriorly, (which is the condition of the tubular stream after it leaves the opening l and while it is owing over and olf from the projecting end of the nozzle 3) operates through the radially expanding action of said jet of compressed air to atomize the tubular stream of liquid most effectively and to deliver the spray thus formed uniformly over a wide area.
The nozzles 3 are preferably removably mounted in the inner tube 2, each nozzle being screwed into a boss with which the tube 2A is provided. Because these nozzles are thus removable, it is possible to change the nozzles if desired and substitute nozzles having a smaller or larger central opening or port depending somewhat on the character of the spray which it is desired to produce.
In Fig. 4 a nozzle 3a is shown which has a much smaller port than the nozzles shown in Figs. 1 and 3.
It would alsoI be possible to employ nozzles having different exterior diameters thereby to vary the size of the annular opening through which the liquid is discharged.
An important feature of the invention is that of having the nozzles 3 extend clear through the openings 4 in the liquid-containing chamber and extend slightly beyond the exterior face of the liquid-containing chamber so that the tubular stream of liquid is not aiected by the expanding action of the compressed air or steam until after such tubular stream has moved out of the opening 4 and is, therefore, unconnned exteriorly.
The character of the spray may be varied by varying the pressure of the air, steam, or other gaseous fluid in the inner tube 2 and consequently the pressure of such gaseous fluid as it issues from the nozzle.
The liquid in the liquid-containing chamber l may be allowed to flowthrough the openings 4 by gravity, as would be the case if said chamber were only partially lled with liquid as indicated in Fig'. 1, or the chamber I may be lled with liquid under more or less pressure.
Moreover, since the jets of air, steam, or other gaseous fluid issuing from the nozzles do not act on the tubular streams of liquid until after the latter have been entirely discharged from the liquid-containing chamber, said jets Will have little or no effect on the rate of discharge of the liquid through the ports I regardless of the pressure of the gaseous fluid in the inner tube 2.
A multiple spray apparatus comprising an outer liquid-containing chamber presenting a smooth under side in which is formed a plurality of Cylindrical openings, an inner tube containing fluid in gaseous form under pressure located entirely within the liquid-containing chamber, and a plurality of nozzles carried by the inner tube, one for each opening in the liquid-containing chamber, each nozzle having a delivery opening of uniform diameter and extending entirely through its opening axially thereof and projecting slightly beyond the outer smooth face of the liquid-containing chamber, the portion of each nozzle occupying an opening being cylindrical and having an exterior diameter smaller than the diameter of the opening it occupies, thereby providing between each nozzle and the wall of its opening an annular space having parallel inside and outside Walls which constitutes an annular port of uniform area through which the liquid from the liquid-containing chamber flows in a gravity-propelled tubular stream which encloses the nozzle, the expanding action of the jet of compressed gaseous fluid issuing from the projecting e'nd of each nozzle into the interior of the corresponding gravity-propelled tubular stream acting thereon after it leaves the liquid-contain ing chamber to expand it radially and convert it into a spray covering a wide area.
WALTER E. HENSEL.
REFERENCES CITED `The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 325,376 Baker Sept. 1, 1885 980,002 Price Dec. 27, 1910 1,017,533 Goodlett Feb. 13, 1912 1,047,619 Decker Dec. 17, 1912 1,239,075 Bagnall et al. Sept. 4, 1917 2,178,539 Hill et a1. NOV. 7, 1939