US2223104A - Rotary screen - Google Patents

Description

E. HANSEN ROTARY SCREEN Nov. 26, 1940.

Filed Feb. 28, 1939 3 Sheets-Sheet l ATTORN EYS E. HANSEN ROTARY SCREEN Nov. 26, 1940.

Filed Feb. 28, 1939 5 Sheets-Sheet 2 ATTORNEYS Nov. 26, 1940. E. HANSEN ROTARY SCREEN Filed Feb. 28, 1959 3 Sheets-Sheet 5 INVENTOR ATTORN EYS Patented Nov. 26, 1940 V UNI/TEDPTSTATES PATENT OFFICE 2,223,104 ROTARY SCREEN EarlHanscn, Application February 2 3 Claims.

The invention relates to a rotary screen and more especially to a bladed rotary water driven screen.

The primary object of the invention is the provision of a screen of this character, wherein moss, algae, debris or the like within a body of water will be forced down stream with the current flow within a canal, river or other waterway from which there is taken a supply to an-irrigating 19 ditch through an intake box, weir or the like and in this way eliminating the deposit of such moss, algae, debris orthe like within the ditch utilized for irrigating purposes. Another object of the invention is the prolfi vision of a screen of this character, wherein the water flowconstitut'es the power in that the current of the stream propels the said screen and in the rotation of such screen inassociation withblades, matter such as moss, algae, debris or the like collected thereon will be expelled therefrom under a whirling action set up by the screen so that this moss, algae, debris or the like will be continued down stream with the water current without causing the chokingof a lateral water- 5 way from such stream used for irrigating.

A further-object of the invention is the provisicnof a screen of this character, wherein the construction thereof is novel, particularly in the arrangement ofblades within a reticulated body o'r cylinder so that water power operates the screen for its rotation relieving accumulations at the outer side of the screen and effecting the down stream course thereof with the current flow in a canal, river or the like.

A still further object of the invention is the provision of a screen of this character, which is simple in its construction, thoroughlyreliable and efiicient in operation, automatic in the working thereof, and inexpensive to 'manufacture and install;

With these and other objects in view, the in-- vention consists in the features of construction,

combination and'ar rangement of parts as will be mately on the line 2---2' of Figure l looking'in the direction of the arrows.

Mabton, Wash.

8, 1939, SerialNo. 259,039

Figure 3 is an enlarged detail sectional view taken on the line 3-3 of Figure 1 looking in the direction of the arrows;

Figure 4 is a sectionalzviewtaken on the line 4-4 of Figure 3 looking in the direction of the arrows.

Similar reference characters indicate corresponding parts throughout .the several views in the drawings. n

Referringto thedrawings: in detail, A designatesgenerally a portion of a canal, river or the likehaving water flow therein in the direction of the arrows indicated inFigure 1 while B denotes an intake box, weir or the like for communication with an irrigating ditch ,C, the intake openins. 0 establishin c mmun cation between the box, weir or the likeB and the. ditch C being formed in-a vertical wall ll of saidditch. This opening is controlled .by a flow gate l2 fitting guides 13 for .yertical slidable movement. The ditch C receives the water fromthe canal, river or the like A through the-intake box, weir or the like B and such ditch constitutes allateral waterwaywith respect to the current flow within said canal, river or the like. i V V Within the box, weir or the like 3 equally spaced from'the opposite sidewalls l4 thereof in proximity ,tothecanal, river or the like A and rising vertically from thefoundation or bed l5 of said box, weirv or the like is a tubular stationary vertically disposed shaft I6 for the rotatable fitting therewith of a center huh I! forithe rotatable screen D. Y

The h ub I T of the screen D has suitably joined therewith diametrically opposed radially extending upper and lower spider armsv l8 which are joinedin any suitable manner at their outer ends with inner perpendicular angle'bars IS with respect'to a cylindrical reticulated or wire mesh screen body 20. This body 20is'held against the bars I9 and madev secure by clam'ping strips 2| outside of thesaid body and'havingfastene'rs 22 passed therethrough and engaged withthe bars [9. These bars 19 at their upper and lower ends are joined withtop and bottom tubular rings 23 maintaining cylindrical contour to the screen body 20.

Formed with the arms 18 concentric to the hub ll are laterally ofiset pivot eyes 24, these being vertically aligned adjacent to the outer ends of the arms 18 and releasably accommodate pivot pins 25 for horizontally swinging water impact blades 26 adaptedfor movement toward and away from stop rods 2'! vertically fitted between and to the said aImS-"| 8 tO:1l8 in the path of movement of'the blades 26. The blades 26, when contacting with the rods 21, will be disposed radially in conformity to the lay of the arms I 8 Within the screen body 2| and in this position receive impact from the water through lent whirling stream of water set up by the rotary screen operating within the box, weir or the like B and in this manner eliminating any resistance to the water'power imposed upon the said screen for the propulsion by the current" flow present within said canal, riveror the, like. The screen D of the structure before set forth should be set Within the box, Weir o'rfith' like. B for rotation on a vertical axis so that approximately one quarter of its diameter is in the flow of :the current water within the-canal, river or the like Aandthusthe blade 26 onzthat side. or. the screen with its one.-quart,erdiameter: in the flow of. the currentwillbe in:- contact With the rod 21 next thereto. for receiving the impact of the current flow and thus causing the screen. D to? deposited-on the outside of the screen until that area of the screen [body covered by the said moss, algae, debris or the like approaches parallelism with the current flowin the canal, river or thelike thence this deposit will be washed off by the water passing through the screen body 20. At this point the blade in that position previously stated swings free from the current and idlesaround away from the rods 21 next thereto in the rotation of said screen so as not tocreate any resistance to the rotation of the said-screen. It

is obvious that the water current within the canal; river or the-like A is the' power medium for propelling the screen and in the rotation of the latter the blades, which'havepreviouslylost impact from the 'current flow 'will feather thewater in its twisted circulation within the screen D andthe box,'-w eir or the-like B; respectively The moss, algae, debris, or the like within the canal, river or the like A when lodging upon the-screen body 20 isdislodged'and caused to be carried down stream Within the said canal, river or the like without flowing into the'box, weir or the like B for deposit within the ditch Q.

Qn the side wall 14 of the box, weir'orthe like B up stream with respect to the current'flow of water within the said'canal, river or the'jlikeh' is arranged an adjustable deflector plate 28," be- 1- inghinged at 23 to the said wall at thepoint of communicationof the box,weir orthe likewitn' the canal and adjustmentof thisdeflector plate like A in the direction of the; s'creen to vary the impact of 'suchcurrent flow against a' blade 26 in its path interiorly ofthe screen body '20 of the rotatable screenD' in this' m'anner the speed of rotation- 0f the latter deregulated". At e s m e h qefle err e el avoi s h i l e ss a a @ehfis 5 1; th l ke 11th.

the box, weir or the like B at the upstream side thereof from the canal, river or the like A.

The screen body 2|] is open at the top and bottom of the rotary screen and the shaft H5 at the upper end thereof has loosely seated thereon a bearing ball 33 with which contacts a disklike cap or head 34 on the hub H, which latter telescopes over the said shaft l6, as is clearly shown in Figure 3 of the drawings, and in this manner free rotation of the screen D is assured with minimum friction. The shaft l6 forms a lubricant container in that the centerbore 35 therein receives a quantity of lubricant (not ing at 36, the latter being suitably fixed or anchored in the bed l5 for the proper positioning ",of the screen D as hereinbefore stated.

The gate 12 at its upper end is fitted with a hand grip 31 so that said gate can :be conveniently raised and lowered for regulating the flow of water into the ditch Cfrom thebox, weiror the like, the water being admitted from the canal, river or the like A, I I I I t It is preferable to have the blades 2t taper from their pivotal ends toward their free ends, as illustrated in Figure 3 of the drawings.

The lower open end of the screen body 2 O is disposed in close relation to the bed 15 of the box, weir or the like and the height of the screen D issuch that the screen body 20 thereof extends a above the high Waterlevel in the canal, river or the like and the box, weir or the like respectively, so that water will not overflow the said screen D in the Working thereof and in this way eliminating any interference with the working of the blades for impact and feathering positions of the same. I I

I In-the operation of the screen, the'screen body D rotates on a vertical axis and its rotation hora izontally is in a direction following the direction of the flow of water or current within a stream. Such screen body travels at a rate of speed slightly'lessthanthe speed of travel of the Water of a stream so that any objects or material flowing downstream and in the same direction of rotation ofthe screen body will be carried along inthe stream by the current or flow h re When passing the outer edge of a. de-

flector blade 26 downstream, such objects or-material will be carried to a point well downstream uponthe surface of the screen body, being held thereto until washed off by water passing;

through the mesh of thesaid screen body at a point that is in line withthe outer edge of the defleotor blade or parallel with thestream or just before the latter reaches this point. The

deflector blade 28 is adjusted, not by any set ruleother than to adjust it to the best performance of the screen in the working'thereof. L deflector blade causes whatever objects or ma terial, that is to say, debris, that is in the water to be-deposited on the already downstream trav cling area of the screen body ata, point-thatis well downstream from that portion furthermost upstream or transverse to and at right. angles with respect to the said stream. The debris will not go around the screen body asthe current flow and the direction of travel of the said screen body are both downstream. What is claimed is: I

1. A rotary screen for an intake box to ii;

rigating ditch communicative withv the body of prising a vertically disposed tubular shaftfix edly arranged within the box adjacent to and centered with respect to the point of communication of the said box with the body of water and forming a lubricant container, a ball seated upon said shaft and adapted to be lubricated by content thereof, a rotary reticulated screen body having a central hub telescoped over the said shaft, a disk-like head centered with respect to the said hub and contacting said ball, the screen body being extended a distance within the body of water at the point of communication thereof with the box, impact blades within said screen body and having their outer ends pivoted adjacent to the inner periphery of the said screen body for horizontal swinging movement, abutments built within the screen body and disposed inwardly of the pivots for said blades for contact by the latter and also holding the said blades radially within the screen body when in contact therewith for effecting rotation of the screen body in a direction of the downstream flow of the said body of water, and an adjustable defiector plate mounted at the point of communication of the box with the body of water next to the upstream side of the screen body and adapted for deflecting debris within the body of water outwardly away from the box at the upstream side of the screen body.

2. A rotary screen for an intake box to an irrigating ditch communicative with the body of water having downstream flow current, comprising a vertically disposed tubular shaft fixedly arranged within the box adjacent to and centered with respect to the point of communication of the said box with the body of water and forming a lubricant container, a ball seated upon said shaft and adapted to be lubricated by content thereof, a rotary reticulated screen body having a central hub telescoped over the said shaft, a disk-like head centered with respect to the said hub and contacting said ball, the screen body being extended a distance within the body of water at the point of communication thereof with the box, impact blades within said screen body and having their outer ends pivoted adjacent to the inner periphery of the said screen body for horizontal swinging movement, abutments built within the screen body and disposed inwardly of the pivots for said blades for contact by the latter and also holding the said blades radially within the screen body when in contact therewith for effecting rotation of the screen body in a direction of the downstream flow of the said body of water, an adjustable deflector plate mounted at the point of communication of the box with the body of water next to the upstream side of the screen body and adapted for deflecting debris within the body of water outwardly away from the box at the upstream side of the screen body, and an adjustable gate arranged with the said box at that side next to an irrigating ditch.

3. A rotary screen for an intake box to an ir- 'rigating ditch communicative with the body of water having downstream flow current, comprising a vertically disposed tubular shaft fixedly arranged within the box adjacent to and centered with respect to the point of communication of the said box with the body of water and forming a lubricant container, a ball seated upon said shaft and adapted to be lubricated by content thereof, a rotary reticulated screen body having a central hub telescoped over the said shaft, a disk-like head centered with respect to the said hub and contacting said ball, the screen body being extended a distance within the body of water at the point of communication thereof with the box, impact blades within said screen body and having their outer ends pivoted adjacent to the inner periphery of the said screen body for horizontal swinging movement, abutm-ents built within the screen body and disposed inwardly of the pivots for said blades for contact by the latter and also holding the said blades radially within the screen body when in contact therewith for efiecting rotation of the screen body in a direction of the downstream flow of the said body of water, an adjustable deflector plate mounted at the point of communication of the box with the body of water next to the upstream side of the screen body and adapted for deflecting debris within the body of water outwardly away from the box at the upstream side of the screen body, an adjustable gate arranged with the said box at that side next to an irrigating ditch, and means for adjustment of the said deflector plate and holding it in a determined adjusted position.

EARL HANSEN.

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