US1912020A - Trash removing mechanism for water screens - Google Patents

Description

May-30. l933 R. T .STEINDORF 1,912,020

.TRASH REMOVING MECHANISM FOR WATER SCREENS Filed Nav. 17, 1931 2 sheets-sheet 1 Roberti? Stez'ndoij May 30, 1933- R. T. sTElNDoRF TRASH REMOVING MECHANISM FOR WATER SCREENS A Filed Nov.

, 1931 2 Sheets-Sheet 2 e ROBERT T. STEINDORF, OF

Patented May 30, 1933` UNITED STATES PATENT OFFICE MILVAUKEE, WISCONSIN, ASSIGNOR TO CHAIN BELT COM- PANY, OF MILWAUKEE, WISCONSIN, A COBIORATION OF WISCONSIN TRASH IREHVlOVINC-rY MECHANISM FOR WATER SCREENS Appiication inea November 17, 1931. serial No. 575,672.

This invention relates to trash removing mechanism for water screens, and more particularly to a device for removing trash accumulations from the traveling scrapers :or rakes which are commonly associated with water screens of the stationary bar type, and has for one of its objects to provide a device of this character which will be simple in construction, comparatively inexpensive to manufacture and more eiiicient in use than those which have been heretofore proposed. Y

With the above and other objects in view which will appear as the description pro'- ceeds, the invention consists in the novel details of construction and combinations of partsmore fully hereinafter described and particularly pointed out in the appended claims.

Referring to the accompanying` drawings forming a part of this specification in which like reference characters designate like parts in all the views Figure 1 is a vertical sectional view through a typical stationary-bar trash screen, taken approximately on the plane indicated by the line 1-1 of Figure 2, looking in the direction of the arrows, and illustrating a trash removing device constructed in accordance with the present invention associated therewith;

Figure 2 is a front elevational view of the parts shown in Figure 1 as seen from the lefty of the latter figure, with the forward wall of the head frame housing omitted for the sake of clearness;

Figure 3 is an enlarged vertical sectional view of the trash removing mechanismk andits immediately associated parts shown in Figure 1; and

Figure 4 is a transverse sectional view of the parts shown in Figure .3, taken approximately on the plane indicated by the line 'i-44 of the latter figure.

Referring more particularly to Figures 1 and 2 the trash screen installation, which is commonly installed in a liquid conduit 5 of concrete, comprises a screen grid y6 composed of spaced bars 7 which is set into the con#k duit 5 transversely thereof and usually in an inclined position substantially as shown.

The function of the bar screen 6 is to remove from the liquid flowing through the conduit 5 the larger debris and trash, which accumulates .upon the forward surfaces of the bars 7, as will be readily understood. In order to remove such trash accumulations from the bars there is usually provided a scraper mechanism or rake as it is commonly termed, comprising a substantially flat bar or sheet 8, one edge of which is serrated or notched as at 9 to coact with the screen bars 7 as will be readily understood. The said rake 8 is secured to and carried by the spaced endless chains or belts 10 which are trained about head sprockets 11and foot sprockets 12 earried respectively by the head shaft 13 and the foot shaft` 14 journalled in suitable bearings 15 and 16 respectively. Power is supplied to the head shaft 13 by a suitable motor and speed reducer indicated at 17 through sprocket 18, chain 19 and' sprocket 2O carried by the head shaft 18.

In order to support and guide the uprun of the chains 10 there is provided adjacent each wall of the conduit 5 the angle chain-guides or supporting members 21, upon the inwardly projecting flange of which the chains slide,`as will be readily understood from the drawings. The rake or trash removing member 8 is thus guided during its upward travel and its notches 9 engage the faces of the screen bars 7 and scrape the accumulated trash or other debris therefrom, moving the` latter upwardly beyond the upper ends of the bars.

The bars 7 terminate at approximately the top of the conduit 5 and abovev this point there is erected a head iframe including suitable uprights such as 22 and 23, and a housing 24. A suitable receiver 25 is positioned within the said housing to receive the trash accumulations from the rake 8 and since some water'is necessarily carried along with such trash accumulations the drain 26 is provided for returning such water as may drain from the trash to the ychamber 27 from which it may return through passage 28 to the rear of the screen 6, see Figure r1.

Vhile the refuse screened from the water by'a screen of this type is generally of more or less large character and in many instances will of itself slide off of the rake 8, at the same time there is usually present some refuse which clings to the said rake and requires assistance in being removed therefrom.

For scraping such refuse from the rake, the present invention provides the oppositely disposed horizontally inclined channel guides or track-ways 30 which are carried by suitable supports 3l secured to the frame members 22 and 23, as best shown in Figures 3 and 4. A carriage 32 comprising side frame members 33, a transverse angle member 34 extending between and rigidly secured at its ends to said members 33, and wheels or rollers 35 which are journalled as at 36 to the said side members 33, is mounted for rectilinear motion on the said trackways 30. As will be clear from Figures 2, 3 and 4 the supports 31, track-ways 30 and carriage frame members 33 'are disposed outside of the chains l0 and their guides 21, while the cross bar or angle 34 extends across from one side member 33 to theother behind the chains l0 and guides 21. Secured to and extending from the cross angle 34 between the chains l0 is a plate or scraper member 37 having an angularly disposed portion 38 which is normally adapted to lie in the path of travel of the rake 8, as clearly shown in full lines in Figure 3.

Since the carriage 32 and the scraper 37 carried thereby maymove freely backward and forward along the channel track-ways 30, it will be readily apparent that as the rake 8 is advanced upwardly by the chains l0, as indicated by the arrow in Figure 3, it will push before it the scraper member 37. This motion will be transmitted to the cross member 34 and frame members 33 and the entire carriage together with the scraper .member 37 will be moved upwardly and toward the right as viewed in Figure 3, the wheels 35 rolling in the channel track-ways 30. Such movement will of course draw the lower edge of the angular portion 38 across the upper surface of the rake 8, scraping therefrom any accumulated trash or debris and causing the latter to be deposited into the receiver 25. As the upward motion of the rake continues the carriage v32 and scraper 37 will reach the broken line position shown in Figure 3, where the right hand edge of the rake 8 will clear the angular portion 38 of the scraper, thus permitting the rake to pass by and continue its circuit. After the rake has passed, the carriage 32, together with the scraper member 37 will reverse its movement and return to the left, as kviewed in Figure 3, under the action of gravity so as to be in substantially the full line position indicated in the said Figure as the rake again approaches after its next cleaning operation of the screen bars 7. The carriage 32 will be prevented from moving too far to the left through engagement of thercross bar 34 with the rear faces of the chain guiding angles 21, as will be readily apparent.

It is obvious that those skilled in the art may vary the details of construction as well as the precise arrangement of parts without departing from the spirit of the invention, and therefore it is not wished to be limited to .the above disclosure except as may be required by the claims.

What is claimed is: A

l. In trash removing mechanism for trash screens having a traveling cleaning member, inclined supports positioned in co-operative relation to the path ofsaid cleaning member; and means rectilinear-ally movable in said supports and engageable with the surface of said cleaning member toremove trash accumulations therefrom.

2. In trash removing mechanism for trash screens having a traveling cleaning member, guides disposed at an angle to the path of said cleaning member; and meansreciprocably mounted in said guides vengageable with the trash-receiving surface of said cleaning member and movable in said guides through the travel of said member to sweep across said surface and remove trash accumulations therefrom.

3. In trash removing mechanism for trash screens having a traveling cleaning member, spaced inclined guides disposed transversely of the path of travel of said cleaning member; a frame mounted in said guides for rectilinear reciprocating movement toward and fromrsaid path of travel; and a scraper carried by said frame, engageable with the trash-receiving surface of said cleaning member, saidv frame and vscraper being movable in one direction through the travel of said member, tocause the scraper to sweep across said trash-receiving surface and remove trash accumulations therefrom. v 4. In trashremoving mechanism for trash screens having a traveling cleaning member, spaced supports inclined from the horizontal disposed transversely of the path'of travel of said cleaning member; a frame mounted on sai-d supports for reciprocating movement t0- ward and from said path of travel; and a scraper carried by said frame, engageable with the trash-receiving surface of said cleaning member, said frame and scraper vbeing movable up the incline of said supports through the travel of said member, to cause the scraper to sweep' across said trash-receiving surface and remove trash accumulations therefrom, said frame and scraper moving down said incline under the inuence of gravity after said cleaning member has passed.

5. In trash removing mechanism for trash screens having a traveling cleaning member, a pair of horizontally inclined spaced trackwaysVV intersecting the plane'of travel of said cleaning member; acarriage fra-me having rollers mounting it for reoiprocation on said traokways; and a scraper carried by said frame, engageable with the trash-receiving surface of said cleaning member, said frame and scraper being movable up the incline of said trackvvays through the travel of said member, to cause the scraper to sweep across said trash-receiving surface and remove trash accumulations therefrom, said frame and scraper moving down said incline under the influence of gravity after said cleaning member has passed.

In testimony whereof, I aix my signature.

ROBERT T. STEINDORF.

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