US2473933A - Sprayer nozzle - Google Patents

Description

June 21, 1949. J, zl-EuNsKl 2,473,933

SPRAYER NOZZLE Filed Dec. 19, 1946 INVENTOR 19 V .9 16 fi ygyfi ZieZmrZ'i- ATTORNEY Patented June 21, 1949 UNITED STATES PATENT OFFICE 4 Claims.

This invention is an improvement in spray nozzles, especially nozzles from which a fluid under pressure can be forcibly discharged in the form of a jet to serve a required purpose.

An important object of this invention is to provide a nozzle which is elongated in shape and designed to eject a spray of fluid in the form of a thin sheet, the flow being coplanar with reference to the length of the sheet, and uniform in volume per unit of time and velocity throughout the extent thereof. The nozzle is adapted to emit either liquid or gas and is constructed to serve a variety of purposes in the most efficient and practical manner.

On the drawings,

Figure 1 is a rear view of the casing or body of the nozzle;

Figure 2 is a transverse horizontal section thereof; and

Figure 3 is a transverse Vertical section on line 3-3 in Figure l.

The nozzle comprises a body or casing l which has an elongated outlet opening 2. This opening is relatively narrow and it is controlled by a valve element or spray plate 3 which has on the side adjacent said opening a tapered edge 4. The casing has a top 5 and a bottom 6 which converge toward the opening 2 and it is closed by ends I and rear 8. The top, bottom and ends may be in one piece, but the member 8 is detachable.

The valve 3 is movable transversely of its length to control the discharge of fluid through the outlet 2. For this purpose it is adjustably supported by means comprising rods 9, which are mounted in the back plate 8 of the casing.

These rods have threads in on their inner ends. They project at the rear 8 through openings II therein, and on their outer ends are heads I2. The outer ends also have threads and are inserted into threaded bores I3 in the heads I2. Screw plugs I4 in these openings hold the knobs or heads I2 and rods 9 in rigid relation, so that by means of the heads the rods can be rotated. The plugs l4 have polygonal recesses l5 to receive a tool to operate the plugs into and out of position.

The spray plate 3 is attached to a bar l6, substantially pear-shaped in cross section, with its thinner edge presented to the discharge outlet 2. This bar has a slot I1 which receives the edge of the plate 3, and the latter is secured to the bar in any suitable way. The upper and lower sides of the bar l6 being curved, the spaces between the bar and the inner faces of the top 5 and bottom 6 are of such shape as to afford an approximately Venturi-shape in cross section, and give a smooth flow of the fluid through them. Each rod 9 has a collar or flange I8 inside the casing in front of the rear wall 8, and said Wall is counter-bored on its inner face at the open-' ings H to receive packing rings I9. Coiled compression springs 2|] encircle the rods 9, seating against the collars I8 and washers 2I over the packing rings I9. Thus, while the knobs or heads I2 can be turned to rotate the rods and adjust the valve 3, leakage through the openings I l is always prevented.

The rear member 8 is affixed to the casing I by screws 22, and packing 23 is interposed between it and the top 5, lower part 6 and ends I. Fluid under pressure is forced into the casing I through one or more supply pipes 24. This casing can be of any desired length and the fluid issues from the outlet 2 in the form of a long continuous sheet and in greater or less volume according to the position of the valve 3. Preferably several inlets 24 for a longer sprayer are used. The sides or ends 7 are fashioned to have grooves 25 on their inner faces to serve as guideways for the ends of the spray plate 3, projecting a little beyond the ends of the bar I6. The adjusting movement of the element 3 is thus facilitated.

The sprayer above described is well designed to give a continuous sheet of spray of constant cross section and volume at all points along the length of the opening 2. The fluid may be gas or liquid, as already indicated, and the pressure of the fluid at the discharge opening may be varied over a wide range by adjusting the valve plate to be close to or relatively remote from the opening 2. The nozzle or sprayer can be employed for the separation of materials, as in de-scaling, debarking and washing; for cooling and for extinguishing fires, or to emit a thin sheet of liquid for dyeing.

The structure of the casing and valve plate is such that the fluid entering the body is unifonmly distributed inside the casing, and is forced to pass by on both sides of the bar I6. This bar is of such shape as to prevent turbulence and gives the fluid a smooth flow up to the exit thereof at the outlet 2. The valve has such shape with respect to the inside surfaces of the outlet as to give to all the fluid in contact with it, the same direction. The fluid thus is given a constant pressure and the out-going jet is uniform and even along the full length of the plate.

With the bar I6 having the cross section above stated, the spaces between the bar and the upper and lower walls of the casing cause the fluid to have a very smooth flow above and below the valve plate. The two currents converge and unite at a predetermined distance from the end of the plate in the opening 2. This distance is regulated by the concavity and slope of the tapered edge 4 of the valve 3, and the effect of a small vacuum created over and under the valve by the rapid passage of the fluid past the valveplatelii. The slight difierence in pres? sure flattens out the spray entirely as it leaves the casing; and afiords the long continuous sheet desired.

Having described my invention What I :believe to be new is:

1. A nozzle comprising a hollow body'having a relatively narrow opening, avalveelementzhave ing a tapered edge of substantially the same length as-said opening, a bar in said 'body to which the valve is affixe'd, said body having inside surf aces converging towards said :opening, said .ibar beingsubstantially paralielmtossaidzopene ing, and having rounded: sides presented .to said surfaces-and tapering towardlsaid element means comprising arod :attached to the :bar and :extending to the-routside 'nf t-the abod-y,;-a 4001191 011 said. rod within thebody, ran elastic rm'ember encircling the rod between said collar and one 6f th inside surf aces :of the "body, and the: rod having .a threaded 1.portion outside of :the body, a knob on said :portion :and 1a :screw =plug iin knob engaging said rod.

2. The nozzle according to claim "1 in thenends of the body have grooves in-line with the ends of said. opening, and thevalve element projects beyond the ends of {the 'bar into said grooves.

A nozzle comprising -a .hollow body having a'converging'top 'an'd'bottom, ends secured there} 9 and r m mbe attached t he to? nd 4 bottom and ends, the top and bottom converging and being separated along one edge to present a narrow elongated opening, a valve ele- 'ment having a tapered edge in said opening of substantially the same length as said opening, a bar to which the valve element is affixed, said bar having rounded sides presented to the converging top and bottom and converging towards said valve element, means comprising a .rod Irotatagbly :attached to the \bar and Tprojectingthrough the "rear member'tothe oiitside of the body, a collar on said rod in the body, a

"spring between the collar and the rear member, '-.-,t he :outer end of said rod being threaded, a

knob screwed upon said threaded end and a screwplug in the knob for releasably securing the knob "to .the rod.

4. The nozzle according to claim 3 in which the ends of the body have guide grooves in line with the edge of said opening and the valve element :proiects =ibeyond the ends of --th'-e bar into said guide "grooves.

' UQSEPI-IJZIELINSKI.

REFERENCES :GIIED The f l o' i si ferfi iq s ar of misp d file .of thispatent:

=UNITED :PATENTS-

Images