US2222776A - Scrubbing machine - Google Patents

Description

Nov. .26,v 1940.

G. LINKE |:rAL 2,222,776 scRUBBING MACHINE Filed sept. 27, 1937 12 A sa b 3f sa `my ".0

I'NvENTqRs GERHARo LINKE Auusr voEEL Arronns Patented Nov. 26, 1940 PATENT OFFICE scnUBBmG MACHINE Gerhard Linke and August voegel, Magdeburg,

Germany, assignor to Fried. Krupp, 'Gi-usonwerk, Aktien-Gesellschaft, Magdeburg-Buchan,

Germany Application September 27, 1937, Serial No. 165,859

In Germany October 1, 1936 3 Claims. (Cl. 209-3) Our invention relates to gyrating scrubbers for Washing and scrubbing ores, sand, gravel and other materials in bulk with the object ofA removing nes therefrom and positively separating 5 impurities and foreign matter such as clay, tone. lime and like adhesives, which are crusted and dried thereon and often tenaciously stick to the lumps and granules of the material concerned.

The principal object of the invention is to provide a structurally improved gyrating scrubber for the purpose set forth which is highly simple and inexpensive in its construction, reliable in operation and requiring relatively little power and expenditure for maintenance and re- 15. pair.

In connection therewith the invention aims at providing a gyrating scrubber having a relatively high efficiency and great output per hour considering the oor space and power required yet so designed, that the liability of breaking upand comminuting the materiailunder treatment is reduced t0 a minimum.

Briefly stated the invention consists in cooperatively associating a plurality of scrubbing troughs of special design having one-dimensionally curved inner working faces and being sub. stantially horizontally arranged side by side with their crests ysubstantially in a level straight line, and in bodily gyrating said troughs in substantially vertically disposed cycles of movement perpendicular to their crests and in clockwise direction of rotation as indicated by arrow i in Fig. 1 of the drawing.

The' inventors have found that by so design- '35 ing, arranging and gyrating said troughs the material fed thereinto will spontaneously climb over their crests and will be positively advanced through the troughs viz. dynamically-as against statically or gravitationally.

40 The inventors attribute the spontaneous migration of the material through the troughs to the fact that the agglomerates, lumps and granules of which the material is composed receive by virtue of their irictional engagement with the gyrating inner walls of the troughs violent rotary impacts in quick succession and in a specic sense or direction, namely with the result. that they are thrown off the gyrating surface and are incidentally rolled around in anticlock- 5 wise direction as indicated by arrow :c in Fig. 2 of the drawing, and that in turn the whole mass of the material performing arolling and trundling motion is displaced, namely liftedas on the ascending inner walls of a rotary ball mill. Another salient feature of the invention is the provision of a relatively thick lining of resilient material in the scrubber, capable of being replaced at lowcost, with the object of enhancing the frictional interengagement of the inner work? ing faces of Ithe scrubber and the material under :5 treatment, thereby promoting the migration and agitation of the. material in the troughs, safeguarding the latter against excessive wear and intensifying the scrubbing effect.

Still other objects of the invention will be- 10 come incidentally apparentto practitioners in this field as the specification proceeds.

The nature and scope of this invention are briefly outlined in the appended claims and will be more fully understood from the following l5 specification taken together with the drawing, in which Fig. 1 is a perspective view diagrammatically showing by way of an example a gyrating scrubber designed according to this invention; 20

Fig. 2 is a cross section longitudinally taken through the trough section of a structurally modied scrubbing machine designed according to this invention; A

Fig. 3 is another fragmentary cross section in 25 a larger scale showing a guide plate as provided in the troughs of the scrubber according to thisF invention;

Fig. 4 is a fragmentary section showing a. trough of modified cross sectional shape; 30

Figs. 5-7 are cross sectional views showing baille members and their adjusting means as provided according to this invention for controlling vthe travel of the material through the scrubbing machine: 35

Figs. 8 and 9 are cross sections drawn in different scales through one of the troughs of the scrubber having a perforated bottom and being lined with india rubber or the like.

The gyrating scrubber shown in Figs. 1 and 2 40 and designed with the objects in view outlined above, comprises:

(1) A support representing bed Il;

the machine (2) An open box frame I2, resiliently mount'ed 45 l at its four corners on said support by means of coil'springsl3, I3 and brackets'M, I4', so as 'to be capable of being bodily gyrated in vertically disposed paths of movement and in clockwise dire'ction indicated by arrow i; 50 (3) Means for gyrating said frame, which comprise an excentric shaft 20, crosswisely extending through the frame .I2 in engagement therewith and being carried at both its ends in bearings 2|, which are xed on the support II; 55

justably fixed and which are fixed near both ends of the excentric shaft 20 for counterbalancing the centrifugal forces produced while the machine is in action; a pulley 26 for rotating the excentric shaft 20, and a prime mover (not shown) (4) A plurality of trough shaped material receiving elements having one dimensionally curved inner working or impeller faces, which aremounted in frame I2, being fixed on the side Walls of the latter with their axes in substantially parallel relation to the shaft in the embodiment of the invention shown in Fig. l all the troughs 3b, 3c, 3d, 3e are perforated except the trough 3a at the feed end of the scrubbing machine, where feeding means of conventional design are provided symbolically, indicated by an arrow a, while in Fig. 2 all the troughs 3f, 3g, 3h, 3i, 3k are perforated;

(5) A system of sprinkler pipes 40, which is mounted above the washing troughs and to which water is supplied through main pipe 4I.

On gyrating the scrubbing machine described in clockwise direction by rotating the excentric shaft 20 the material, which is fed into the machine at a, is given a trundling motion and while rolling around in circular and elliptic paths of movement interlooping each other as indicated by loops and arrows 2:, namely in anticlockwise direction, will be dynamically advancedas against gravitationally-and pass directly from trough to trough over their upper edge or crest portions r; the material being exposed to the jets of water during its travel through `the machine is thoroughly washed-and is discharged over the chutes 48, 48'.

In cases, where the material to be scrubbed is mixed with impurities and adhesives firmly dried and tenaciously sticking thereon, one or more washing troughs, which are not perforated may be provided according to this invention at the feed end of the machine as shown at 3a in Fig. 1, wherein the material is first thoroughly soaked in water with the object of conditioning, namely mollifying and softening the adhesives concerned for the subsequent treatment in the scrubbing troughs proper 3b, 3c, 3d, 3e.

As seen in Fig. 3 guide plates 50 of curved cross sectional shape substantially corresponding to that of the bottom of the troughs and extending longitudinally @therethrough may be provided with the object of guiding the material in `close proximity and positive engagement with the gyrating trough surface so as to promote the trundling motion imparted to the material and enhance the scrubbing actio'n.

As seen in Figs. 5 to 'I troughs 3u of a modified cross section shape having their less steeply inclined working face n at the delivery end may be used to advantage, namely in connection with baille members in the form of flat bars 60 adjustably fixed on the side walls of the frame I2.

In the embodiment of the invention shown by Way of an example the means for adjusting said baille members 60 in vertical and horizontal direction relatively tothe working face n and crests 1' of the troughs comprise angle irons 6 I 6 I having vertical slots, wherein the bale members 60 are slidably fixed by clamping screws 62, and horizontal slots formed in the frame I2, wherein said angle irons 6I, 6I' are slidably fixed by clamping screws 63, 63', 64, 64'.

In the course of their experimental work the inventors have found that the scrubbing action levers 22, on which balance Weights 23 are ady upon the material under treatment is greatly intensified, that the expenditure for maintenance and repair of gyrating scrubbers can be appreciably reduced, and that their life can be considerably lengthened by lining the working faces of the washing and scrubbing troughs with a relatively thick coating of rubber, indicated at 'I0 in Figs. 8 and 9, or kindred relatively soft resilient material impervious to water preferably artificial German rubber known as Buna as now produced on a large scale and in qualities superior to genuine India rubber, namely as regards resistance to wear and anti-ageing properties.

Good results have been obtained with rubber linings 10 to l2 mm. thick.

The rubber lining may be given to advantage a roughened or corrugated surface as indicated at 'Il in Fig. 9: by said roughened and relatively thick rubber liningv the trundling motion imparted to the material under treatment by the gyrating troughs and consequently the scrubbing effect is greatly intensied; also the inner surfaces and lower edges of the holes in the scrubbing troughs should be lined with rubber or a like protective coating as shown at 'I2 in Figs. 8 and 9 in order to prevent premature Wear and excessive widening of the holes.

Various other modifications and changes may be conveniently made in the structural details of gyrating scrubbers of the improved design described without departing from the spirit and the salient ideas of this invention:

For instance instead of troughs having a somewhat parabolic or hyperbolic cross sectional shape shown in Figs. 1 to 3, 5 and 9 semicircularly shaped troughs 30, as shown in Fig. 4 may be used to advantage under specific Working conditions.

What we claim is: ,1. A machine for continuously scrubbing material in bulk, which comprises a plurality of scrubbing troughs having one-dimensionally curved inner working faces and being adjacently to each other arranged side by side for communication at their crests, the latter being substantially in the same level plane, of side walls closing the ends of said troughs and extending above their crests, means at the front end of the machine for feeding the material thereinto, means for gyrating said troughs in closed cycles of `movement substantially perpendicular to their crests. means at the rear end of the machine for discharging the material therefrom, and baille members in the form of flat' bars provided at the said crests for controlling the passage of the material thereover.

2. A machine for continuously scrubbing material in bulk, which comprises a plurality of scrubbing troughs having one-dimensionally curved inner working faces and being adjacently to each other arranged side by side for communication at their'crests, the latter being substantially in the same level plane, of side walls closing the ends of said troughs and extending above their crests, means at the front end of the machine for feeding theV material thereinto, means for gyrating said troughs in closed cycles of movement substantially perpendicular to their crests, means at the rear end of the machine for discharging the material therefrom, baille members 7 in the form of fiat bars provided at said crest portions for controlling the passage of the material thereover, and means for adjusting the posiv 3. A machine for continuously scrubbing material in' bulk, which comprises a plurality fofscrubbing troughs ahaving one-dimensionaliy curved inner working faces and bing adjacently to each other'arranged side by side for communication at their crests, the latter being substantially in the same level plane, of side walls closing the ends of said troughs and extending above crests, means at the front end of the machine for 10 feeding the material'thereinto, means for gyrating said troughs in closed cycles of moi'ement substantially perpendicular to -their crests, means at the rear end of the machine for discharging

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