US1183393A - Spraying-nozzle. - Google Patents

Description

I. S. & O. E". MERRELL.

"SPRAYING'NOZZLE. APPLICATION FILED r53. 16. I912.

www Patented May16,1916.

2 SHEETS-SHEET la as A IRVING S. MERRELL AND OLIVER EDWARD MERRELL, 0F SYRACUSE, YORK, ASSIGNORS T0 .MERBELL-SOULE COMPANY, OF SYRACUSE, NEW YORK, A CORPURA- TION OF- NEW YQRK.

Specification of Letters Patent.

srnarrne-nozznn.

Patented May 16 119116.

Application filed February 16, 1912. Serial No. 678,116.

taining moisture and having \a high vis- .cosity, such as condensed milk and eggs, into a dry powder.

; Particularly, the invention consists in such a pressure spray nozzle especially designed for ejecting a material, such as condensed milk or eggs, into a current of heated air, in accordance with the method set forth in the United States Letters Patent to Stauf,

- No. 666,711, January 29, 1901.

'sults, in desiccating a hig In the present commercial practice of the Stauf invention the milk, eggs or blood, is ejected into a current of heated air through a minute discharge orifice of the spray nozzle at a high pressure, a pressure in ex-- cess of two thousand (2,000) pounds per square inch being employed. In the case of the spray nozzles which have heretofore been employed,the discharge of the spray at the high velocity due to the pressure into the l current of heated air tends to create a partial vacuum in the vicinity of the exterior of the nozzle on its discharge face and particles of the sprayed liquidcollect on the discharge face of the nozzle surrounding the discharge orifice so that a layer of the sprayed material forms thereupon, 1n a molst condition. This collected material, being immediately in the path of the heated air, is baked into a crust and is injuriously aflected by the heat to which it is continuously subjected, and particles, being blown ofi from time to time, asthe mass accumulates, minglewith the properly dried powder and affect the quality thereof.

One important object. of the present in material.

We have found, by long experience and practice that in order to obtain thebest re-.

hly .viscous material, such as condensed milk, the liquid view of the plug.

should be converted into an exceedingly fine mist by the spraying nozzle, and that the mist should be widely diffused within the drying chamber in order to' insure immedlate and thorough evaporation by bringing it 1nto intimate contact with 'a large volume of the heated air current. It is important that the particles of this mist should be as nearly uniform in size as possible and that these particles be distributed as uniformly as possible through the heated air current. This insures the thorough and rapid drying of every particle with the greatest possible economy of heat and power. In order to obtain these results a whirling movement is IIIIPELItGd tO the liquid within the spraying device and a high pressure is employed. This produces a fine uniform spray or mist which whirls at high velocity as it emerges from the spraying device and is thus caused to difi'use widely and mix intimately and uniformly with the air current. A high pressure must be used to make the spray uniformly fine and to discharge it at a high velocity and in sufficient quantity through the minute discharge orifice employed to render the process commercially practicable.

The desiocating chamber may be of ma sonable limits, for the sprayed liquid is converted into a dry powder before coming in contact with any of the walls of the chamher, as the result of the diffusion and rapid drying of the sprayed particles.

A nozzle embodying the present invention is illustrated in the accompanying drawings, wherein- Figure 1 is a side View of the nozzle, a portion of its ejecting end being broken away to illustrate the character of the disin front view. Fig. 5 illustrates the body of the nozzle, showing a side view partly in section thereof and also a rear View thereof. Fig. 6 illustrates the plug which closes the rotary chamber of the nozzle at the rear,

this figure includin a rear View and aside ig. 7 is a plan view of the strainer and its supportmg rin or sleeve. Figs. 8. and 9 are detail sectional viewsjllustrating by arrows the course of the milk or other similar liquid under treatment.- Figs. 3 to 7, inclusive, are on a scale double that of Figs. 1 and 2, and Figs. 8 and 9, are on a scale four times that of Figs.

Structurally, the nozzle comprises a body A, a cap B, a casing C, a spray disk D, a plug E, a plug pin F, a screen G, a-screen supporting ringer sleeve H, and a washer I.

The casing C, is interiorly screwthre aded at a, to receive at its rear end a liquidconveying pipe J, shown in Fig. 1. Forward of the screw threaded end a, the casing is'enlarged constituting an interior chamber 1), which is inte'riorly screw threaded at its rear end to receive the' exteriorly screw threaded sleeve H, to the rear face of which the screen G, is attached by soldering or in an equivalent manner. The front end of the sleeve H, is notched as indicated at c, to facilitate insertion and withdrawal. The body A, has a flange d, at its outer end, which is supported against the outer end of the cas ing 0, the washer I, being interposed. The body is maintained in place liquid tight by the. cap B, which screws on to the exterior of the casing C, and forces the flange of the body tightly against the washer I.

The body A, has a liquid whirling chamber K, at the middle of its outer side to which the liquid is conveyedby two ducts L, L, which communicate at their outer ends with the chamber 7), of the casing C.

The rear end of the whirling chamber K, is closed by the plug pin F, held in place by the plug E, which screws into a socket e,

at the rear of the body A.

The spray disk D, has a minute central orifice M. connecting with the whirling chamber K, and through which the liquid is discharged in a fine spray.

The ajutage O, on the cap B, is outwardly flaring conical or vas, and its central axis is in line with the center of spray orifice M. and withthe central longitudinal line of the whirling chamber K.

Assuming that milk is the liquid to be sprayed, it is forced under heavy hydraulic pressure, say two thousand pounds per square inch'or greater, through the feed pipe J through the screen G, into the interior chamber 6; thence through the ducts L, L, into the whirling chamber K; and thence outwardly through the spray orifice M, and

. of, at its cylindrical smallest place.

can be judged by specifying certain of the measurements. The interior diameter .of

the chamber 6, is one and three-sixteenths The plug pin F, is less than one-tenth of an inch in diameter, being .0895 of an inch in diameter and it makes a close fit Within the whirling chamber K. The outer end of the whirling chamber K, and the inner face of the spray disk D, are concave, the radius of the circle of concavity on the inner face of the spray disk being'LO365 of an inch. As shown in Fig. 9, by reason of these concavities, the whirling chamber K, at the rounded discharge end has a smooth concave wall for directing the whirling liquid to the spray orifice M. The conical wall of the vas ajutage 0, makes an angle of thirty-one and one-half (81.5) degrees to the axis thereon the exterior faces of the nozzle when sprayed at high pressure into a current of heated air. The inclination of the face P,

is opposite to that of the ajutage.

At its outer or discharge end, the spray orifice M, is flared or coned in conformity with the coning of the ajutage so as to provide a smooth continuous surface for the liquid in passing from the minor diameter of the orifice to the ajutage. The drill measurement heretofore stated for theorifice is-that which determines the diameter there- The spray disk is .036 of an inch in thickness. Each of the ducts L, is made by a drill of the diameter of .0265 of an inch. Each of these ducts L, is at an angle of twenty-five (25) degrees to a plane perpendicular to the axis of the whirling chamber, as indicated in Fig. 9. The ducts L, enter the whirling chamber at its bottom just in front of the outer end of the plug pin F. As shown in Fig. 8, the two ducts L, are not in line with each other nor in line with the central axis of the whirling chamber, but are respectlvely offset to opposite sides of said axis. These two ducts are made by drills entering in opposite directions and where these drills pass each other at the axis of the whirling chamber there is a space of one one-hundredth (.01) of an inch between their nearest faces. Accordingly, the two opposite streams of milk entering the wh1 ling chamof and the external front face P, of the cap B. is likewise conical and the angle of this masses ber, (circular in cross-section) at high velocity set the milk into rapid rotation and since the restricted portion of the spray orifice is of very small extent alongthe line of the axis ofthe whirling chamber, this whirling movement continues in the discharge spray. The screen is of one hundred to the inch wire mesh and it prevents the I r passage of any solids which might clog theducts L, and the spray orifice-M.

All of the parts are readily detached and reassembled to facilitate cleaning the nozzle and in making repairs.

All parts are made of brass, with the exception of the plug pin F, and washer I, the latter being preferably made of hardened steel, readily detachable from the plug -E. The whirling of the milk in the whirling chamber .K, rapidly bores a hole in the end of abrass pin. Accordingly, a pin of hardened steel is desirable. Thewasher I, is preferably made of lead. 1

All of the surfaces with which the liquid may come in contact after entering the mouths of the ducts L, are highly polished; and both faces of the' spray disk are highly polished as well as the faces of the cap and body which -meet the spray disk. thereby making the spray joints liquid tight.

We claim 1. A high pressure spray nozzle having in combination a body portion with a whirling chamber and ducts leading thereto, a cap having an vas ajutage, a removable spray 'disk interposed between the cap and body portion and having a minute discharge orifice between the whirling chamber and said ajutage, and a casing "secured to the cap and having a chamber surrounding the rear part of the body portion.

2. A high pressure spray nozzle having in combination a body portion having a whirling chamber and ducts leading thereto, a spray disk removably secured between the cap and bodyportion and having a minute discharge orifice leading from the whirling chamber, a cap having an opening registering with said discharge orifice, and a casing connected to the cap, saidcasing and cap operably related 'to hold the body portion in proper relative position. l 3. -A high pressure spray nozzle having in combination-a body portio n ehaving a whirlin'g chamber,'substantially circular in cross section and concave at its outer end, and" ducts leading thereto, a spray disk removably secured between the cap .and body portion and having a minute discharge orifice leading from the whirling chamber,fa cap having an opening registering with said discharge orifice, and a casing connected to the cap, said casing and cap operably related toy I hold the body portion in'proper relative position. V 4. A high pressure spray nozzle having in with each other and o combination a body portion having a whirling chamber and two oppositely inclined feed ducts entering the bottom of said whirlinfig chamber out of line with each other and 0 set to one side of the axis of said chamber, the two ducts entering said chamber at section and concave at its outer end, and two oppositely inclined feed ducts entering the bottom of said whirlin chamber out of line fi set to one side of the axis of said chamber, the two ducts entering said chamber at opposite sides of said axis, a spray disk removably secured between the cap and body portionandhaving a minute discharge orifice leading from the whirling chamber, a cap having an opening registering with said discharge orifice, and a casing connected to the cap, said casing and cap 0perably related to hold the body portion in proper relative position. 1

6. A high pressure spray nozzle having in combination a body portion having a whirling chamber circular in cross section and with a concave outer end and a discharge orifice at the center of its outer end, a plug adjustably related to said body portion and having a hardened plug pin closing the inner end of said whirling chamber, a spray disk removably secured between the .cap and body portion and having a minute orifice registering with the discharge orifice of the whirling chamber, and means for holding the spray disk in operable position.

7. A highpressure spray nozzle having in combination a body portion having an open ing therethrough, a portion of said opening internally threaded, a screw plug engaged with said portion and provided with a plug .pin fitting said opening tightly and adapted to form a removable bottom for a substan- "tially cylindrical unobstructed whirling chamber, said screw plug having a laterally extending flange at its rear portion of greater diameter than the internally threaded portion of said body and adapted to contact withsaid body portion to limit the relative movement of said parts in one direc-' tion, a removable spray disk having a minute orifice communicating with said whirling chamber, acap holding'said spray disk in proper relative position to said body portion, and an inlet to said whirling chamber.

8. A spray nozzle comprising a body porducts leading to tion having a whirling chamber circular in cross section and concave at its outer end, a recess in the outer face of said body portion, a spray disk seated in said recess and hav ing an orifice leading to the whirling chamber, said orifice cylindrical at its smallest dimension, concave at its inner end and forming a continuation of said whirling chamber, and flaring at its outer end and said whirling chamber.

9. A spray nozzle comprising a body portion having a whirling chamber circular in cross section and concave at its outer end, and having a removable hardened plug forming the bottom wall thereof, a recess in the outer face of said body portion, a spray disk seated in said recess and having an orifice leading to the whirling chamber, said orifice cylindrical at its smallest dimension, concave at its inner end and forming a continuation of said whirling chamber and flaring at its outer end, inclined ducts discharging across said chamber at opposite sides of an axis thereof, and a cap holding said spray disk seated in the recess in the outer face of said body portion and having an vas ajutage forming a continuation of the liaring outer end ofthe spray disk orifice.

10. A spray nozzle comprising a body portion having a whirling chamber, a duct leading to said chamber, a cap having an vas ajutage, a thin spray" disk removably secured between the cap and body portion and having its opposite faces lying throughoutsubstantially their entire area in contact with the body portion and cap respectively,

said disk having a minute orifice forming means of communication between the whirling chamber and the vas ajutage in said cap.

11. A spray nozzle comprising a body portion having a whirling chamber, a duct leading to said vas ajutage, a thin spray disk removably secured between the cap and body portion and having its opposite faces lying throughout substantially their entire area in contact with the body portion and cap respectively, said disk having a minute onfice forming means of communication between the ajutage through chamber, a cap having an tween the whirling chamber and the f'was ajutage in said cap, the wall of said orifice being the only portion of said disk exposed in the whirling chamber.

12. A spray nozzle comprising a body portion and a cap having an ajutage,one of said elements having a recess formed in the face adjacent the other element, a thin spray disk in said recess and having its opposite faces throughout substantially their entire area in contact with the body portion and the cap respectively, said body, inclined ducts leading to. said chamber, said spray diskhaving a minute orifice'forming means of communication bethe cap and the whirling chamber.

13.'A hi h pressure spray nozzle having in combination a body portion provided with a whirling chamber circular in cross section and substantially eight hundred and ninetyfive ten-thousandths (.0895) of an inch in diameter, a cap having an vas ajutage, the wall of which is inclined to the axis of theajutage approximately thirty-one and five-tenths degrees (31.5 and an external face inclined in the opposite direction approximately fifty-three and twenty-five onehundredths (53.25) degrees to the axis of the ajutage, a removable spray disk interposed between the cap and body portion and having an orifice approximately two hun: dred and sixty-five ten-thousandths (.0265) of an inch, or less, in diameter, a casing secured to the cap and having afchamber, ducts leading from said chamber to the whirling chamber, said'ducts approximately two hundred and sixty-five ten-thousandths (.0265) ofan inch in diameter and inclined to a plane perpendicular to the axis of the whirling chamber approximately twentyfive (25) degrees.

In .witnesswhereof we have hereunto set our hands this llth day of February, 1912.

IRVING s'. MERRELL OLIVER EDWARD MER LL.

Witnesses: Q

EUGENE A. THOMPSON,

H. E. CHASE.

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