US3591091A

US3591091A - Deflector-type spray nozzle

Info

Publication number: US3591091A
Application number: US794510*A
Authority: US
Inventors: Albert B Luecke Jr; Oderick S Galloway
Original assignee: FMC Corp
Current assignee: FMC Corp
Priority date: 1969-01-28
Filing date: 1969-01-28
Publication date: 1971-07-06
Anticipated expiration: 1988-07-06

Abstract

This invention relates to a deflector type spray nozzle for mounting on a pipe to obtain a flat trapezoidal shaped spray pattern. The spray nozzle is made entirely of a strong durable plastic resistant to corrosion and abrasion. It is equipped with a self-locating interchangeable bushing which may be easily changed to obtain different flow rates by means of a different size orifice and which fits in a simple straight hole in the pipe without auxiliary sealing means. A single size U-bolt and single size deflector assembly may be used for pipe sizes of 1 inch to 3 inches inclusive.

Description

United States Patent [72] lnventors Roderick S. Galloway Challont; Albert B. Luecke, Jr., Cheltenham, both of, Pa.

[21] Appl. No. 794,510

[22] Filed .Ian. 28, 1969 [45] Patented July 6, 1971 [73] Assignee FMC Corporation San Jose, Calif.

I54 DEFLECTOll-TYPE sriuw NOZZLE 13 Claims, 12 Drawing Figs.

Primary Examiner- Lloyd L. King Attorneys- F. W. Anderson and C. E. Tripp ABSTRACT: This invention relates to a deflector type spray nozzle for mounting on a pipe to obtain a flat trapezoidal shaped spray pattern. The spray nozzle ismade entirely of a strong durable plastic resistant to corrosion and abrasion. It is equipped with a self-locating interchangeable bushing which may be easily changed to obtain difierent flow rates by means of a different size orifice and which fits in a simple straight hole in the pipe without auxiliary sealing means. A single size U-bolt and single size deflector assembly may be used for pipe sizes of 1 inch to 3 inches inclusive.

PATENTEDJUL 619m 3,591,091

SHEH 1 BF 2 INVENTORS RODERICK s. GALLO WAY ALBERT B. LUECKE, JP.

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PATENTEDJUL sum 3,591,091 SHEET 2 BF 2 INVENTORS 88 RODERICK S. GALLOWAY eyglmm ATTY'S ALBERT B. LUECKEJR.

DEFLECTOR-TYPE SPRAY NOZZLE BACKGROUND OF THE INVENTION 1. Field of the Invention These spray nozzles find wide application in refuse cleaning sprays for traveling water intake screens, for the sprays on vibrating screens, for cleaning vegetables and fruits, and in the rinsing and cleaning of materials in motion or at rest. They are also used for impregnating loose material with liquids, diffusing liquids, as in road sprinkling, or removing oil or scum in settling basins.

2. Description of the Prior Art Some nozzles of this general type have previously beenprovided with a tapered pipe thread which requires threading of the pipe on which it is mounted and'which is subject to deterioration through corrosion in the relatively thin wall thickness of small pipe sizes. These nozzles usually are fitted with a fixed size orifice so that different units must be stocked to provide for different flow rates and, accordingly, the inventory required to be maintained is relatively large. Other types require orifice holes to be drilled in the pipe, and these holes are subject to enlargement through wear and corrosion. Special separate orifice bushings have been used with the above nozzles but these are usually of hardened stainless steel and are relatively expensive. The nozzle assemblies of the above type have heretofore also been made to fit only one particular pipe size, and the provision of assemblies to fit these different sizes increases the inventory of parts to be maintained. Still another type requires a large tapered hole to be reamed in the pipe to obtain sealing, and the orifice is integral with the nozzle assembly. The latter then have to be stocked with different orifice sizes so the inventory problem is again present. The above types of nozzles are generally made in bronze for corros ion resistance or in other special hardenable alloys where abrasion is a problem so the material is relatively expensive.

SUMMARY OF THE INVENTION This invention covers a fluid spray nozzle for producing a wide relatively thin spray pattern which is adaptable to mounting on several sizes of pipe and has a replaceable self-locating bushing which may have different sizes of orifice to produce different flow rates. A single body and fastening means may be I used under a number of different situations and the desired capacity may be obtained from a choice of several small bushings with different orifice sizes.

One object of this invention is to provide a single nozzle assembly which fits several sizes of pipe and which has an interchangeable orifice bushing so that only the bushings have to be stocked in different orifice sizes. Since this is a relatively in which one surface of the orifice is always located so the stream of fluid passing through the orifice flows over the deflector without interruption regardless of'the size of this orifice and is so arranged it can only be assembled in the proper manner to accomplish this.

BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings which form a part of this specification and in which like reference characters designate like parts in all of the views:

FIG. I is a side elevational view of the spray nozzle assembled on a section of a pipe manifold;

I 7 FIG. 2 is a front elevational view of the nozzle assembly shown in FIG. 1;

FIG. 3 is a plan view of the nozzle assembly shown in FIG. 1;

FIG. 4 is a section through the centerline of the mounting member the orifice bushing and the deflector taken along line 4-4 of FIG. 3;

FIG. 5 is a perspective view of the orifice bushing taken looking toward its frustoconical end;

FIG. 6 is a section taken on line 6-6 of FIG. 1 cutting through the deflector just above the top surface of the mounting member and showing the orifice bushing in place;

FIG. 7 is an end view from its frustoconical end of the orifice bushing;

FIG. 8 is a side elevational view of the orifice bushing;

FIG. 9 is a partial bottom view of the mounting member showing the aperture for the orifice bushing with no bushing in place;

FIG. 10 is a section of an embodiment of the orifice bushing with a single tapering converging fluid passageway;

FIG. 11 is a cross-sectional elevation of another embodiment of the orifice bushing which is provided with a tapering converging section followed by a tapering diverging section in the fluid passageway; and

FIG. 12 is top view of the orifice bushing illustrating the constant wall thickness with various orifice diameters.

DETAILED DESCRIPTION OF THE INVENTION In the embodiment of this invention shown in FIGS. 1-3 the spray nozzle 20 is mounted on a manifold 21 which has a hole 22 through one wall. This manifold is most commonly made up of a piece of pipe which may be made of steel, brass, plastic or other suitable materials. It may be assembled from various pipe fittings connecting to a source of fluid under pressure, as from a pump, into a tee-shaped header of a length necessary to cover the width of the area to be cleaned by the sprays. Since each nozzle will produce a spray sheet of a width approximately equal to the distance from the hole in the manifold to the object being sprayed, the nozzles may be spaced on the manifold at distances which will give an overlap of the spray pattern on the object to be cleaned. All parts of this spray nozzle are made of an acetal type plastic, such as Delrin or Celecon, to provide a unit suitably resistant to salt water atmospheres, most solvents, and many chemicals.

The spray nozzle 20, as shown in FIGS. 2 and 3, is made up of an approximately rectangular mounting member 31 containing three apertures on its longitudinal axis 32. At the approximate midpoint of this axis there is a central aperture 33, and the with of the mounting member is enlarged at this point, as shown in FIG. 6, to provide sufficient material thickness around the central aperture 33. Also on this longitudinal axis, and approximately equidistant from the central aperture, are two slotted apertures 35 extending through the thickness of the mounting member 31.

As shown in FIG. 4 the central aperture 33 may be considered to comprise an upper cylindrical aperture 33a that extends part way through the thickness of the mounting member 31 and a lower recess 33b that is of enlarged diameter, approximately 127 percent of the diameter of the aperture 33a, and has a depth of about 19 percent of the total thickness of member 31. As shown in FIG. 9, the recess 33b is so formed that a chordal segment 39 is retained in the mounting member. The chord is perpendicular to the longitudinal axis 32 and is located at a distance from the center of aperture 33 just slightly larger than the radius of the diameter of hole 33. The resulting cross-sectional configuration of recess 33b is noncircular because of the chordal segment 39 and it provides a positive alignment for an orifice bushing 40 that is disposed in the aperture 33.

Orifice bushing 40 as shown in FIGS. 5, 7 8L 8, is essentially cylindrical in shape and its length is approximately 1% times the thickness of the mounting member 31. It has a longitudinal cylindrical aperture 41 extending therethrough and the diameter of this aperture may be varied depending on the flow capacity desired. The inner end portion 42 has an outside diameter that is approximately 5 percent greater than the thickness of the mounting member 31 it is cylindrical in shape; and its length is about five-sixth of the mounting members thickness. The inner end portion 42 is followed by a flanged section 43 having a thickness of about one-sixth of the mounting member's thickness and an outer diameter of about 127 percent of the diameter of the inner end portion. A chordal segment is removed from this flange approximately tangent to the inner end cylindrical portion 42 as seen in FIG. 7. The outer end portion 45 of the bushing extends beyond the flanged section approximately 50 percent of the combined length of the inner end portion 42 and the flanged section 43. It is also slightly tapered so that at its outer end its diameter is about 91 percent of that of the inner end portion 42. The longitudinal aperture 41 is not necessarily concentric with the inner cylindrical end portion 42. Depending upon the diameter DX of the orifice aperture 41, the actual centerline of the orifice is so located that the wall thickness T," on a diameter in line with the longitudinal axis 32 of the mounting member, is always constant as shown in FIG. 12. The chordal section 44 of the flange is also perpendicular to longitudinal axis 32. This orifice bushing 40 can thus only be assembled into the central aperture 33 of mounting member 31 so the chordal section 44 of the flanged section (FIG. 7) fits against the flat wall of the chordal segment of the recess 33 (Fig. 9). The frustoconical outer end portion 45 projects outwardly from the mounting member 31 as shown in FIG. 4.

A curved deflector 50 is formed integrally with the mounting member 31 and is approximately trapezoidal in outline. It projects approximately tangentially from the top surface of the mounting member 31 and perpendicular to the longitudinal axis 32. The deflectors width at its juncture with the mounting member, as shown in FIG. 2, is approximately that of the width of the mounting member 31 and, at its outer edge 52, its width is approximately 4% times that of the mounting member, being symmetrical about a plane P passing through the longitudinal axis 32. The deflector as shown in FIG. 4 is arcuate in longitudinal section, having a radius R" of its inner surface 53 about 4% times the thickness of the mounting member. The deflector is so positioned that at the top of the mounting member 31, the inner surface 53 is tangent to the orifice 41 at the longitudinal axis 32 so that the fluid moving upwardly along the inner surface of the longitudinal orifice 41 will flow smoothly onto the deflector. The outer edge 52 of the deflector is located approximately 3.42 times the thickness of the mounting member 31 vertically above the top surface of the member about 1.6 times its thickness.

The spray nozzle is assembled on the manifold 21 by pushing the projecting frustoconical outer end portion 45 of the orifice bushing into a straight predrilled hole 22 of the proper size in the manifold. A U-shaped bolt 60 is then placed around the manifold 21 so that its threaded projecting legs 61 fit up through the slotted apertures 35 in the mounting member as shown in FIG.'4. A nut 62 is then placed on each threaded leg 61 and tightened securely to hold the nozzle firmly on the manifold and to obtain a fluidtight fit of the bushing 40 in the hole 22 in the manifold. The threaded projecting legs 61 of the -U-shaped bolt 60 are circular in cross section, but the curved portions between these projecting legs are generally rectangular in cross section, as indicated in FIG. 2, to permit them to flex more easily around the various size manifolds on which they may be assembled.

While the most common orifice bushing 40 may have a straight cylindrical hole 41, as shown in FIG. 4, the rate of discharge may be increased by the alternate internal constructions shown in the embodiments of FIGS. and 11. In FIG. 10, the inlet end 71 of orifice bushing 70, has a converging section 72 gradually varying in cross section from its inlet end toward a very short cylindrical section 73 which is of the nominal orifice diameter. In one illustrative example of this construction, a bushing having a nominal 5/16-inch diameter orifice would have the longitudinal axis of this orifice at section 73 offset from the axis of its outer end by three thirtysecond inch. A conical tapering converging section having an included angle of 7 would result in an inlet diameter d! of approximately 0.44 inches and a cylindrical discharge section one-sixteenth inch long having a 5/1 6-inch diameter d2 where the overall length of the bushing is 1% inch and its cylindrical inner end outer diameter d3 is approximately 0.785 inch. The minimum thickness at the inner end 72 is about 0.14 inch.

In FIG. 11 the inlet end 86 of orifice bushing 85 has a converging section gradually varying in cross section from its enlarged inlet to a very short cylindrical section 87 having the nominal orifice diameter at approximately one-fourth to onethird of its length followed then by a diverging section enlarging towards its opposite end. In one illustrative example of this construction, a bushing having a nominal 5/ 16-inch diameter orifice, the same outside configuration and the same minimum wall thickness of about 0.14 inch at its inner end as the bushing of the previous example, would have the longitudinal axis A of this 5/16-inch orifice offset from the axis A1 of its outer diameter by three thirty-second inch and tilted about 3% relative to axis A1. A conical tapering converging section 88 having an included angle of about 13 would result in an inlet diameter of about 0.40 inch for a length of three-eighth inch to the inner cylindrical orifice section 87 which would have a length of one-sixteenth inch and a diameter of five-sixteenth inch. From the inner cylindrical section 87 the passageway would again gradually enlarge toward its discharge end 89 where its diameter would be approximately 0.40 inch and the included angle of the conical diverging section would be about 7.

It is to be noted that while conical sections were referred to in the above examples similar constructions covering converging and/or diverging sections in which the cross sections vary according to some exponential value resulting in smooth curved sections in lieu of the straight tapering sections shown are equally disclosed in this invention.

In one embodiment of this, invention, the mounting member 31 is seven-eighth inch wide by three-fourth inch thick. The

' slotted holes 35 are eleven thirty-second inch wide and as shown in FIG. 6 the centers Y of one slot are thirteen-sixteenth inch long with the distance 2X between the end radius center of one slot and the adjacent inner end radius of the next slot is 2% inch. The deflector is thirteen-sixteenth inchwide at the mounting member and 3% inch at its outer end with the inner radius R of the arcuate deflector being 3 17/64 inch and its outer radius Rl" of the stiffening ribs is 3% inch. The discharge edge 52 of the deflector is 2 9/16 inch above the top surface of the mounting member and projects 1% inch horizontally from the midpoint of the mounting member. The normal range of pipe sizes on which this nozzle is used is 1 inch to 3 inches inclusive and orifice diameters of three-sixteenth inch to one-half inch are provided.

It is to be understood that the form of this invention is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

What we claim is:

1. In a fluid spray nozzle for mounting over a hole in the conduit, the combination comprising:

a. a mounting member having an aperture,

b. a curved deflector secured to said mounting member and having a flat wall portion adjacent said aperture,

c. means providing a positioning surface on said mounting member at'a predetermined distance from theflat wall portion of said deflector,

d. an orifice bushing having a second positioning surface in engagement with the positioning surface of said mounting member and a bore with a wall portion disposed at said predetermined distance from said second positioning surface whereby fluid passing along the wall of said bore will flow smoothly onto the flat wall of said deflector, and

e. fastening means for securing the mounting member and curved deflector with its assembled bushing over the hole in the conduit.

2. A spray nozzle as in claim 1, wherein the orifice bushing has an aperture extending through its longitudinal axis so located on a transverse axis that the minimum wall thickness is maintained constant as the bushing aperture size increases.

3. A spray nozzle as in claim 2, wherein the orifice bushing has self-orienting means and the mounting member has mating orienting means in said aperture for the bushing so that it can only be assembled in the correct position.

4. A spray nozzle as in claim 3, wherein the orifice bushing has an external central flange section with a circular segment removed and the bottom end of the aperture in the mounting member has an enlarged mating pocket to receive the flanged portion of the bushing and to automatically orient the bushing properly.

5. A spray nozzle as in claim 4, wherein the chord remaining on the central flange section of the orifice bushing is perpendicular to a transverse centerline through the bushing aperture and adjacent to the minimum wall thickness of the bushing.

6. A spray nozzle as in claim 2 wherein the orifice bushing aperture is further defined as cylindrical in shape.

7. A spray nozzle as in claim 2, wherein the longitudinal aperture of the orifice bushing is so formed that the inner end is cylindrical and the outer end is a frustum of a cone having its larger diameter at the outer end of the bushing.

8. A spray nozzle as in claim 2, wherein the longitudinal aperture of the orifice bushing has a converging and then a diverging passageway of varying cross-sectional area in the direction of flow.

9. A fluid spray nozzle for mounting over an opening in a fluid discharge member comprising in combination:

a. a mounting member having an aperture therein,

b. a deflector secured to said mounting member in a position to overlap said aperture a predetermined amount, said deflector having a deflecting surface extending from said mounting member,

c. a replaceable bushing having a bore therethrough, said bushing insertable into said aperture and having a wall portion equal in thickness to the predetermined amount of said overlap to align the inner surface of the bore with the deflecting surface of said deflector plate, and

d. means for securing said mounting member to said fluid discharge member with one end of said bushing in said opening of the fluid discharge member.

10. The fluid spray nozzle of claim 9, in which said bushing is made of a plastic material.

11. The fluid spray nozzle of claim 10 is which said fluid discharge member is a conduit and in which said securing means for said mounting member is a flexible U-shaped clamp having legs extending through the mounting member.

12. A spray nozzle as in claim 1, wherein the orifice bushing is made of a nonmetallic semirigid material so that the frustoconical end of the bushing will yield and conform to the hole in the conduit to effect the fluidtight seal.

13. A spray nozzle as in claim 1, wherein the fastening means comprises a generally U-shaped member, having threaded, extended legs and having an arcuate section connecting said legs which is thinner than the legs to encircle the conduit to conform readily to the size thereof, said legs extending through'the mounting member, and a nut on each threaded leg to secure the assembly to the manifold.

@253? UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Dated July 6, 1.971

Patent No. 3, 591 ,091

I t RODERICK S GALLOWAY ET AL It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

' Column 2, line 47 delete "with" and insert width 1 Column 3, line 46 after "member" insert and extends out from the mid-point of the mounting member Signed and sealed this 27th day of June 1972.

(SEAL) Attes't:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents

Claims

1. In a fluid spray nozzle for mounting over a hole in the conduit, the combination comprising: a. a mounting member having an aperture, b. a curved deflector secured to said mounting member and having a flat wall portion adjacent said aperture, c. means providing a positioning surface on said mounting member at a predetermined distance from the flat wall portion of said deflector, d. an orifice bushing having a second positioning surface in engagement with the positioning surface of said mounting member and a bore with a wall portion disposed at said predetermined distance from said second positioning surface whereby fluid passing along the wall of said bore will flow smoothly onto the flat wall of said deflector, and e. fastening means for securing the mounting member and curved deflector with its assembled bushing over the hole in the conduit.

9. A fluid spray nozzle for mounting over an opening in a fluid discharge member comprising in combination: a. a mounting member having an aperture therein, b. a deflector secured to said mounting member in a position to overlap said aperture a predetermined amount, said deflector having a deflecTing surface extending from said mounting member, c. a replaceable bushing having a bore therethrough, said bushing insertable into said aperture and having a wall portion equal in thickness to the predetermined amount of said overlap to align the inner surface of the bore with the deflecting surface of said deflector plate, and d. means for securing said mounting member to said fluid discharge member with one end of said bushing in said opening of the fluid discharge member.

13. A spray nozzle as in claim 1, wherein the fastening means comprises a generally U-shaped member, having threaded, extended legs and having an arcuate section connecting said legs which is thinner than the legs to encircle the conduit to conform readily to the size thereof, said legs extending through the mounting member, and a nut on each threaded leg to secure the assembly to the manifold.