US2125445A - Spray nozzle - Google Patents

Description

Aug; 2, 1938. J. E. HoLvEcK SPRAYNOZZLE Filed Feb. 5, 1937 3 Sheets-Sheet l JOSEPH EHOLVECK.

n Aa ...iieww IN VENT OR BYl A TTORNE Y I Aug. 2, 1938. J. E. HoLvEcK 2,125,445

SPRAY NOZZLE Filed Feb. s, 1937" s sheets-sheet 2 Si@ f- Si@ 6- JosEPH E. Hou/Eck. I

ATTORNEY t Patented Aug. 2, 1938 I UNITED STATES PATENT oFFicE Worthington Pump and Machinery Corporation, New York, N. Y., a corporation of Virglnia n Application February 5, 1.937,l Serial No. 124,214

3 Claims.

This invention relates to nozzles and more par ticularly to spray nozzles adapted for cleaning work, such as the cleaning or descaling of metal sheets in a rolling mill or analogous uses.

An object of the present invention is to provide an improved spray nozzle which will deliver a predetermined fan-shaped stream intact against any desired surface in such manner as to obtain the greatest possible efiiciency from the stream and further to provide a nozzle of this type which is simple in construction and comprises a single nozzle disc which controls the liquid flow, whereby in case of wear or erosion of the nozzle replacement of only one element will be necessary.

Another object of the invention is to provide a nozzle structure as speciiled which is so constructed that a strainer for the liquid passing therethrough may be rmly and securely attached to the nozzle without requiring alterations in the 20 nozzle structure.

With these and .other objects in view, as may appear from the accompanying speciilcation, the invention consists of various features of construction and combination of parts, which will be nrst 25 described in connection with the accompanying drawings, showing a spray nozzle of the preferred form embodying the invention, and the features forming the invention will be speciilcally pointed out in the claims. 80 In the drawings: l

Fig. 1 is a side elevation of the nozzle illustrating the broad side of the spray.

Fig. 2 is a side elevation oi'- the nozzle illustratv ing the narrow side or edge of the spray.

Fig. 3 is an end view of the nozzle.

Fig. 4 is a longitudinal section through the nozzle taken on the line 4 4 of Fig. 3.

Fig. 5 is a longitudinal section through the nozzle similar to Fig. 4 only showing the strainer in place.

Fig. 6 is an end view of the inlet end of the nozzle disc.

Fig. 7 is a cross section through the nozzle disc taken on the line 1-1 of Fig. 6.

Mg. 8 is a cross section through the nozzle disc taken on the line 8-8 of Fig. 6.

Fig.4 9 is an end view of the nozzle disc showing its outlet end.v

Figs. 10, 11 and 12, are diagrammatic views illustrating the manner of forming and the shapes of the outlet ends of the iiuid passage of the nozzle disc. l

Fig. 13 is a longitudinal section through a modi- 55 fled forni of the nozzle.

l Fig. 14 is a bottom end view of the modified form of the nozzle.

Fig. 15 is a cross section on the line I 5-I5 of Fig. 13.

Fig. 16 is aside elevation of the strainer.

Fig. 17 is a bottom View of the strainer.

Referring to the drawings the improved spray nozzle comprises a body I which has a fluid pas sage 2 extending longitudinally therethrough.v

The duid passage 2 isl of uniform diameter throughout its length and opens out through the threaded stem or end 3 of the body. The nozzle body I is attached to a supply pipe (not shown) by the threaded stem or end 3. The central portion of the body I has a wrench head 4 formed thereon and the portion of the body on the opposite side of the wrench head l from the stem 3 is threaded as shown at 5 for threadably receiving the cap 6. The cap 6 is threaded onto the body I for securely attaching the nozzle disc 1 to .the body. The nomle disc 'l is circular in cross sectional shape and is of uniform diameter for a portion of its thickness, its remaining portion gradually decreasing in cross sectional area or tapering as shown at 8. 'I'he tapered portion 8 is engaged by the walls of the tapered opening 9 formed in the end of the cap 6 so that the nozzle disc 'I may be tightly clamped in place against the outlet end of the nozzle body I.

The nomle disc I is formed all in one piece and has a iluid passage I0 extending therethrough which is shaped in a particular manner as hereinafter described for controlling the flow of fluid therethrough and shaping the fluid to provide a fan-like stream as clearly shown in Figs. 1 and 2 of the-drawings.'

The iluid passage III is circular in shape at its entrance II as clearly shown in Fig. 6 of the drawings and it tapers inwardly, decreasing in cross 'sectional area for a predetermined portion of its length, terminating at this ilrst stage decreasing portion of the opening in substantially oval shape, as shown at I2. From the point at which the decreasing of the inlet portion of the water passage III through to the outlet Il, the fluid passage gradually decreases in one cross sectional dimension and increases in another cross sectional dlmension, as shown by the sectional views, Figs. 7 and 8, providing an elongated oval-shaped outlet opening the ends of which are rounded on relatively small radii so as to control the shape and size of the stream of iluid ejected from the nozzle.

For diierent purposes the shape of the outlet end of the fluid passage I0 is varied, and Figs. 10 Y to 12 inclusive of the drawings illustrate dierent shapes o f such iinal outlet openings and also illustrate the manner in which the shape' of these openings are derived at.

For example, in Fig. 10 of the drawings a relatively narrow outlet opening is illustrated which increases in width from the ends of the opening in predetermined gradual increments through predetermined sections of the length of the opening. As for example, the width of the opening at C has increased a predetermined amount through the first section B from the end of the opening while the width through the second section B of the length of the opening has increased a predetermined amount as, ior instance, the first width C plus 4. Through the third section of the length of the opening the increase in the width of the opening is of the. same ratio as through .the second section, that is, the width of the opening at the innermost end of this third section is C plus 4, plus 4. From the innermost end of the third section of the length of the opening to the center the portion of increase in the width is substantially one-half of the portion of increase through the first, second and third sections: B of the length, that is, the width of the opening at its cross sectional center is C plus 4, plus 4, plus 2.

In Fig. 1l substantially the same ratio of increase .in the width of the opening is carried out rapidly in width for substantially one-quarter of I its length from its ends and then decreases more gradually through the inner or intermediate quarter of its length, resulting in a wider and more compact stream. In Fig. l2 a slightly different ratio of increase in the width of the opening is provided throughout the various sections of the length and in this ligure the radii of the circle those of the circles at the ends of the openings in Figs. 10 and 11, and the opening assumes a more perfect oval with substantially the same degree of increase through the first three sections B" with increase in width than those `shown in thesev views may be employed without departing from the spirit of the present invention, the present invention embodying the idea of increasing the width of the outlet end of the fluid passage through the nozzle disc in gradually increasing predetermined increments through regular predetermined sections of the length of the opening and providing such outlet openings with rounded ends in most instances but de viatlng in this specific feature if necessary or desired.

In Fig. 5 of the drawings a strainer I5 is shown for straining the fluid passing through the nozzle. This strainer I5 which is shown in side elevation in Fig. 1'7 of the drawings comprises a perforated sheeft of metal rolled to form a perforated tube which has its outer end closed by a vcap I6. A disc I1 is suitably attached to the inner end ofthe strainer I5 and the disc I1 has aflange I 8 thereon which fits against the inner end of the nozzle disc 1 and against the outlet end of the body I, being clamped securely and rmly in place by the cap 6, thereby permitting the attachment of the strainer I5 to the nozzle when desired without requiring any alterations in the nozzle structure.

As clearly shown in Figs. 5 and 16 the perforated strainer I5 gradually increases in diameter to its inner or outlet end and it opens out through a passage I9 in the disc l1 to the iiuid passage III in the nozzle disc 1.

In Figs. 13 to 15 inclusive a slight modification of the invention is shown in which the body I', nozzle disc 1 and strainer structure I5' are all the same as the respective structures shown in the preferred form of the invention. However, the cap 6 is slightly diierent in construction in that the outer surface of its lower end is threaded as shown at 30 to threadably receive the shut-o cap 3|. The shut-0H cap 3| which is provided with finger or gripping projections 32 about its perimeter is threaded upon the threaded end 30 of the cap 6' and its inner ilnished flat surface 32 fits tightly against the outlet end of the nozzle A disc 1 for cutting o the ow of fluid through the nozzle disc 1'. Leakage-receiving annular channel or groove 33 is formed in the shut-01T cap 3| about the finished `surface 32 for receiving any leakage of fluid from the nozzle and suitable drain openings 34 are provided for draining the channel 33.

From the foregoing description taken in connection with the accompanying drawings it will be apparent that the assembly of `the nozzle is quite simple consisting merely in the placing of a nozzle disc 1 in the cap E and the threading of this cap on the threaded end 5 of the body or in instances where it is desired to use the strainer I5, the strainer is placed with the disc |1 resting upon the nozzle disc 1 before the cap 6 is threaded on the body The threading of the cap 6 on the body brings the strainer and the nozzle disc 1 in proper position and securely and rmly holds at the ends of the opening are much greater than them there. The only Water'. passage in the nozzle which is subjected to Wear or erosion is in the nozzle disc 1, so that in case of excessive wear which might interfere with the effectiveness of the nozzle it is only necessary to replace the nozzle disc which is a single standardized unit, or if it is desired to change the size or s hape of the fan- Alike stream issuing from the nozzle a nozzle disc having the desired shape of outlet for the fluid passage may be substituted with a minimum effort and at a minimumexpense.

It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown but that they may be .widely modified within the invention defined by the claims.

What is claimed is: 1. .In a spray nozzle, a nozzle disc for delivering a fan-like spray-of iiuid having a uid passage I tion thereof,said increasing dimensions lying in the same plane. Y y

2. In a spray nozzle, a nozzle disc for delivering a fan-like spray of uid having a iluid passage therethrough substantially circular in crosssectional shape at its entrance and gradually decreasing in cross-sectional area from a predetermined portion of its length, said decreasing of cross-sectional area being greater on one diameter of the opening whereby the circular fluid passage will gradually merge into a substantially oval passage of reduced crosssectional area, said fluid passage gradually increasing in one crosssectional dimension and decreasing in another cross-sectional dimension outwardly from the minimum area of the gradually decreasing portion thereof, said increasing dimensions lying in the same plane, the portion of said passage which gradually increases in one cross-sectional dimension and decreases in-another being of greater length than the portion of the passage which gradually decreases in cross-sectional area.

3. In a spray nozzle, a body. nozzle disk for delivering a fan-like spray of iluid'having a iluid passage therethrough substantially circular in cross-sectional shape at its entrance and gradually decreasing in cross-sectional area for a predetermined portion of its length, said decreasing cross-sectional area being greater on one diameter of theopening whereby the circular uid passage will gradually merge into a substantially oval passage of reduced cross-sectional dimension and decreasing in another cross-sectional dimension outwardly from the minimum area of .Y

the gradually decreasing portion thereof, said increasing dimensions lying in the same plane, the outer surface of said nozzle disk being tapered for a portion of its length, and a cap for detachlable connection with said body, said cap having an opening for receiving said disk, the walls of which openingl engage the tapered surface of the disk in a wedging action.

JOSEPH E. HOLVECK.

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