US1836269A

US1836269A - Spraying apparatus

Info

Publication number: US1836269A
Application number: US358811A
Authority: US
Inventors: Ralph E Mckenzie
Original assignee: Oliver Farm Equipment Co
Current assignee: Oliver Farm Equipment Co
Priority date: 1929-04-29
Filing date: 1929-04-29
Publication date: 1931-12-15
Anticipated expiration: 1948-12-15

Description

D 1931. R. E. M KENZIE SPRAYING APPARATUS Filed April. 29, 1929 Patented Dec. 15, 1 931 orrlcli l RALPH E. ilrcxnnz n, or behest, wrsconsm issmmn, VIBY MEsnn ASSIGNMENTS,

TO OLIVER FARM,EQUIPME M ANY, A CORPQRATION or DELAWARE.

" isrnatzinei Arrnni rfis i piia aafiiea s in 29,

-' This invention relatesto sprayingappara his and more 'particularlyto anovel form of suction well associated and combined with such an apparatus inra mannerlt'o overcome certain difiiculties hereinafter pointed out. An object of my invention is to= provide"a device of the kind; above identified which is adapted to prevent the 'accumulat'ion of sedimentin the suction well-andon thefscreens thereof, especially when the sprayingoperation is temporarily discontinued. Another object is to provide a suction well having a compartment into which-the suction lpipe extends and having a chamber thereabout adapted to receive the overflow or excess of fluid and return it to the space'surrounding the suction compartment in" such a manner, as to keep the screens of the well cleaned and to maintain a constant agitation of the fluid retaining the "solid substances in suspension and preventi goljlctpion; of sediment. i 1

1 The material usedfor spraying purposes ordinarily contains a large proportion-of solids and unless thefluidis constantly agis tated for the purpose ofkeep'ing the solidsin suspension," they willsettle forming a sedi inent and cloggingthescreen'e nployed at the intake end of the suction pipe. "To avoid the loss of spraying fluid, it is customary tofshut 011? the discharge valve when reaching the ends of the" rows ofpotatoes," or the like, whicharebeingfsprayed; and, again open' the discharge valve when startingto 'spray'another set of rows. When the valve is thus temporarily closed, the fnioveinent of "th'efliii'd is stopped and the solids in suspensionfwill gravitate forming a sediment inthe: suction well and on the screen; When" the valve is againopened the screen is partially 'filled with sediment and the passage of fiuid'there- By my n t o 1 ha fq d l p rat'usso' arranged that the "screensin' the suction well do notreadily become c ogged; If

"for any reason the screens shouldbecome clogged, the arrangement of my inventionis eza Serial no. 358,811. 1

suchj'thatautomatic cleaning'of the screens may be readily efifectedi 1 My-invention will be best understood by reference to the accompanying drawings which illustrate one specific embodiment thereof."" Fig' 1 is a vertical section of a spraying apparatusincorporating my invention, parts being broken aWay to more clearly illustrate the interior thereof and the mode "of 0pera tion.

Fig-"2 is avertical section of my improved suction well. V Fig. '3 a is a cross-section 33;ofFig."2. V y

In Figqlthe spraying apparatus comprises a base inember l suitably supported by traction wheels 5, one of *whichisshown in the taken on the line sectional-view. The tank 6 or any suitable construction is adapted to contain the spraying fluidl A suction pipeT-leads from the suction well 8 in the bottom of tank 6 upwardly through a suitable cover 7. To the end of pipe 7' is connected a flexible] tube :9 leading to'the'pump 11 which is driven from the-sprocket wheel 13by'means of a chain 12. The sprocket wheel 13 is arranged to rotate With one of the traction wheels 5and impart reciprocating motion to the piston rod 12 whenever the tractionwheels are rotated.

The chain l also rotates a sprocket 15 for the agitator 16, the purpose ofwhich is to maintain a constant agitation of the fluid in the bottom] of the tank-'6. An air chamber 17 connectingwith the discharge side of the pump 11 by means of apipe 11 is adapted-to receive and discharge fluid through the pipe 11" so astokeep a relatively constant'pressure within the pipe 18 leading to the spray nozzle 22 A discharge valve 19in the pipe li'ne l8 may be opened andclosed by hand wheel 23 located-just aboveth'e top of an 6 in a position convenient for the {operator} When the valve 19iis open, spraying fluid is free to pass therethrough throughthehinge joint'21 and out: the spray-nozzle=22;

The pump 11 is made of such a size that pumps considerably more fluid than can be dischargedthroiigh the spray nozzlel'. The I excess of'fiuid from the pump passes intothe chamber 17, then outwardly through the bypass valve 24 when a predetermined pressure has been attained. From the valve 24 the fluid is returned through the hose 25 to the suction well 8. The suction well comprises a bell shaped top casting 26 seated on a disc 27. A disc 28 is secured in spaced relation to the disc 27 by bolts 31 passing therethrough, and by

spacers

29 and 29. Annular flanges 32 on the discs 27 and 28 formsupports for a screen 33 of relatively fine mesh which encloses the end of suction pipe 7 forming a suction compartment. A baflle 34: formedin tegral with the disc 28 extends across the suction compartment and perpendicular to the end of the suction pipe 7 in such a manner as to prevent whirling of the spraying liquid as it passes into the pipe. The baffle 34 also forms an abutment for the suction pipe 7 Annular flanges 35 support the screen 36 concentrically about screen 33 forming a re turn compartment. The fluid returning through hose 25 discharging into chamber 2.0 may find its way, through the apertures 38 in the disc 27 between

flanges

32 and 35, into this return compartment. The casting 26 has a nipple 39 onto which the return. hose 25 is fitted.

In the operation of the apparatus, rotation of the traction wheels 5 operates-thepump 11, which draws fluid from the suction well 8 through pipe 7 and tube 9, discharging it. into pipe 18 and air chamber 17 through pipe 11. When the valve 19 is opened, fluid will. spray through the nozzle 22.

Since the pump forces more fluid into the chamber 17 than can be discharged through nozzle 22, a sufficient pressure buildsup to open the by-pass valve 24 and permit the excess fluid toreturn through hose 25 into the fluid return chamber 20. From the chamber 20 the excess fluid passes downwardly through the openings 38 in the disc 2.7 in. a direction substantially parallel with the

screens

33 and 36, thereby removing sediment which may have collected onthe-screens. hen the valve 19 is closed the pump continues to spray and all the fluid drawnthrough the suction pipe is returned. through the hose 25 to the chamber 20 in the suction well. The fluid is constantly drawn through the screen 33 at a relatively high ratev of speed. Consequently the solid materials therein are kept constantly in suspension and no sediment is permitted to form. When the valve- 19 is again opened the spraying operation is immediately continued without such difliculties, as a clogged screen or a spray nozzle filled with a large quantity of sediment.

If for any reason the screens should become partially clogged, they may be automatically cleaned by simply closing the Valve 1.9 for a brief period and allowing all the fluid from the pump to return downwardly through the openings 38 in a direction parallel with the screens which very quickly removes the sediment therefrom.

Having described my invention, it will be understood by those skilled in the art that certain changes and variations may be made therein= without departing from the spirit and scopeof the appended claims.

7 I claim as my invention:

1. In a spraying apparatus, a tank for a spraying solution, means for conveying the solution from the tank including a suction pipe, a screen enclosing the end of the suction pipe, a second screen surrounding the first screen leaving a space between the screens, and means for returning a portion of the solution to the space between the screens to keep the solution in said space in constant agitatiou 2. In a spraying apparatus, a container for a spraying solution, means for withdrawing the solution from the container includ ing' a pipe extending into the solution, means for drawing the solution through said pipe, a plurality of spaced screens surrounding the end of the pipe, and means for keeping the solution agitated in the space between the screens.

3. Ina spraying, apparatus, a suction well comprising a pipe for discharging a liquid, a screen enclosingv the end of the discharge pipe, a second screen surrounding the first screen leaving a space therebetween, a chamber communicating with the space between the screens and means for conveying a portion of the discharged solution through said chamber into the space between the screens to prevent the formation of sediment.

4.. The combination of a liquid container, a pump for withdrawing liquid from the container,'a suction well connected to the pump: and located in the container, a screen in said suction. well, means for returning a portion of the liquid withdrawn by the pump to the suction well, andmeans for causing the returned liquid to move perpendicularly to the liquid passing through the screen, thereby preventing, the accumulation. of sediment.

5.v In a spraying apparatus an intake strainer comprising a pair of spaced discs, a pair of concentric cylindrical screens of different diameters between said discs, an intake pipe extending into the smaller cylindrical sceen,v and a return. pipe communicating with the space between the screens.

6=.. A suction well. comprising means for receiving discharge pipe, said means including aifluid return chamber, a suction chamber below said fluid return chamber, said suction chamber comprising a suction compartment and a fluid return compartment, a screen between said compartments and means for permitting the passage of fluid from said return chamber into said return compartment in a direction substantially parallel with said screen other of said compartments communicating 7. In a suction well, means for receiving a discharge pipe, asuction chamber, screens dividing said chamber into a plurality of conipartments, a, return chamber communicating with one of said compartments and anwith the discharge pipe.

8. In a suction well, a suction chamber and a fluid return chamber, a disc memberfor separating said chamber, a second disc spaced from the first said disc and forming the bottom of said suction chamber, screen supporting flanges on said disc, screens dividing said suction chamber into a plurality of concentrically arranged cylindrical compartments, means for admitting the discharge pipe into i the inner cylindrical compartments and I means for directing fluid from return chamf ber to the outer cylindrical compartment in a direction parallel with said screens.

9. In a suction well, a suction chamber and a fluid return chamber, a d sc member'for separating said chamber, a second disc spaced ment for dividing the lower end thereof and 7 preventing the whirling of fluid in said pipe, and means for directing fluid from the return chamber to the outer compartment in a direction substantially parallel with said screens.

10. A spraying device comprising an intake compartment, two spaced apart intake screens arrangedanteriorly thereof, a liquid supply tankcommunicating with the compartment through the screens, a pump communicating on its intake side with said chamber, a V

spray nozzle communicating with the discharge side of the pump, and means for withdrawing, anteriorly of the nozzle, a portion of the liquid pumped by the pump and for returning it to said chamberbetween the screens.

In witness whereof, I hereunto subscribe my name this 22d day of April, 1929. V RALPH E. MoKENZIE.