US2095385A - Sand treating apparatus - Google Patents

Description

Oct. 12,1937; fR. HEISSERMAN 2,095,385

` l SAND TREATING APPARATUS Filedl Mayvls; 1956 A s sheets-sheet` s *u me M we o f 2 ,0953485l f '7 `porationofilllinois f w i l x ,im 13: wasser@ I 141,(1l`ain`1s.- (Cl.1209-120)` i o This inveutionffrelatesayto anoap'paratus material and'has for oneobject-topijovide` an o apparatus:` ofythe type" indicated `which will treat I netal particles `Whichfrnay` I t I `rfiixfrd withfit after tsjuseinzcasting operations.,

f l Another. object is `to, provide f Mmfenenonwitn aldevice of the :type indicated; an o adjustable sand 311.9611?? f adjustable both .astofits` position `and `struck` by `theltimpeller are caused to.' pass. "Another object` is `to provide :in connection with o a device of this type a dust-tight housing and dischargingthe reclaimed sandl o grammatically in j the accompanying drawings, Wwhereinrethroughgone type ofitheinvention;` 1 `25` FigureZfisa transverse,section l Adetail,talfren El atylinei2-2gof Figurefl; a 1x `Figure 3`1is"a `lorigitudinal `generally horizontal sectiontakenjatlineu3-f3ot1iigurel1i` l i3 FigurelAlls" alongitudinal vgenerally 'Vertical ..Figure is a ltransverse generally verticalosec-` enlargedscale o, I

\ 11i-:Figure 6 isafside velevation of thernainlhousing `35 on an enlargedscalep I l l Figure TZ. is a transverse generallyivertical secl prevent4 the `dischargeV or" escape of` sand, except `:inthzdirection; of desired dischargel lThe'housing a o o I lbottom maybe inclinedyor horizontal, depending o k: 'an impellenrheans for'catching heavier particles suohasirnetahafter theyleave the impeller, andv mean'sf `for screening out sand fvvhic'l'r` may have `teenpafried*over withgthemetaiparticles.; An

`treating casting `sand and ),sirnilar;` orianalogous g i sandawhich has beerirusedv in 1casting solas Vto?` reconditionthe sand and: ol separatefrom` it as ,to theol trajectories .through `vvhich particles to provide vibratoryrneans `forScreening and for I VI "Other'objectsywill appearafrom timeto rieure 1" ist a51Qgituniiiaixenicalsection` "osectionaidetail, taken at linen-4, @fingere 3; I

tional detail taken at? line 5-5 ot `Figure A; on an bottom `to contact the conveyor;` if one `is present,` andfftoprevent `theescape ofair and dust'and` tol l mechanism" in addition to 'thehousin'g lcoinprises vided..`

" upldraftodustidischarge connection is alsopro- `Inltheparticularfornoslioyvnffisaconveyor fr:

belt which passes about a pulley 2. 'l'hebelt rnay be driven by any desired rneans-` The belt"jand pulley is enclosed infla" housing"/SQyvhich` joins .aria in @neet formsa part @amusing 4,; housing 4 may have a pivoted or otherwise `mov;`

able tondoor -5,"`an upper'fair vent pipe 6i and adovvnward extension?, Whichas here" shovvnis bolted tothe housing datand may coinprisefirif` Wardly bent portions `8, as shown particularly in Figures?` and8`. Positioned across the lower end of .the housing sectionfl` is a flexible'sealing mem- .ber' `9` which contacts `5a" sand removal ,conveyor 15 beltI Il `whichlrnayy be positioned 'about YpulleyV I I.

Alongthesidesof'the inwardly bent portions are ejr'ible sealinglmernbers "I3 `which also con tact tneneitjllo. `A guide, piane i4 is positioned below theupper'prun ofthe conveyor belt 1I0`to 20 to it.` It is` open atfits discharge end as atl,

except `for asealing curtain I1 which may be made of aplurality' `of strips, `as shown particularlytin Figure :o 2, or might be rnade'ofa singlelsheet'of material. .This curtain ingeneral projects down"- `Werdly'suficiently toy eXtendjintothe upwardly 30 a .rnoving stream I8 oaf` Vreconditioned sand Yvv'llich lies upon the, conveyor beltv n.I 0L It thus vtends (to I prevent thepassageofainbut may befrnoved `aside to permit lsand to` be carried throughl the discharge opening bythe conveyor belt.

l Fixed `Withinmehousing is@ beine la winh may be secured by ears :120.1and rivets `2I to the Walls-` of the housing.` As shown in Figure 1 it isvformed of two relativelyinclined sections. 5 :Itrrnay be of anysuitable shape and its purpose 40 ,is to direct `the heavier .particlesto the `screen structure.` ,a I a I The screen structure preferablyhas anangular `crosssection,` having `a ridgeor peak generally n, I

along line `XI-Xof Fig. 13 and `forrns part of "a `45` vibratory assembly which includes a bent rod' l screen`22, and twochute sections 23 and 1.2L VThis o j sub-assemblyalso includes abaille plate 25, xed

. to` one Walker` theichutestructure. lPivoted on theiortvard Wall of the chute structure upon ears 2s is a shaft 21 Awhich"extends outwardiy from a the housing at `one end and carries; an adjusting y )handle 28 Which engages alguadrant y29 to which` vit maybe secured in adjustedposition vbya bolt f `3l) `or by any other desired.securing1n`ear`1j`s`. 'I'he 55 bar or rod 33 and hang downwardly more or less into the path of the sand and other particles. Projecting into each of the chutes 23 and 24 is a sealing curtain 34 which may be secured to the housing 4 by a fastening plate 35 or by any other suitable means. Figure 6 the curtain is preferably made of strips of material although might be made of a single sheet. As shown in Figure '7 it is of such length that its lower margin liesupon the bottom of the chute within which it is positioned to prevent passage of air.

TheA chute 24 is provided on either side with outwardly projecting lugs 36 which are positioned between lugs 31 secured to the side of the housing 4. Between the lugs 36 and each of the lugs 31 is a cushioning member 38 which may be of rubber or some other cushioning or `shock absorbing material of such size, shape and consistency as to permit relative vibration.

The lugs 31 are positioned on the opposite side of the housing 4 and between them the lugs'39 of the chute 23 are positioned. Shock absorbing members 38 are positioned between the lugs 31 and the portions 39, the shock absorbing members on each side of the housing being preferably the same. A saddle 4I) extends across and either is secured to or made integrally with the chute section 23. A vibrator 4I is positioned on the saddle 40. The details of this vibrator are not shown as they form novessential part of the present invention. Preferably it is an electric vibrator which vibrates to cause vibration of the entire chute assembly thus vibrating the screen, the chutes themselves, and the baie 3|.

To strike and impel the entering sand there is provided a rotary impeller, which comprises a shaft 42, which mayear'ry at one` end a pulley 43 by means of which it may be driven from any suitable source. Bearings 44 support the shaft for rotationand are carried upon bases 45 which as shown are provided with a series of perforations 46 for adjustment. To effectively seal the space around the shaft 42 and to permit of the adjustment just mentioned, there is mounted on each end of the shaft a sealing member 41. A hoodlike member 48 is positioned on the inner side of the housing 4 at each side to overlap and embrace the sealing members 41 as indicated in Figures 4 and 5. The lower margin of the member V48 is notched or cut away as at 49 as shown particularly in Figure 4. A sealing plate 50, hav- .ing a flange 5I along its top and sides, lies within the hood 48 between the housing 4 and the sealing member 41. It is perforated to fit upon the shaft 42. 52 is a guide member secured on the inner wall of the housing 4 and arranged to be contacted by and to guide the `plate 50. The housing is apertured at 4a for the shaft 42.

Fixed on the shaft 42 are two rotor members rims 55, carrying spoke-like projections 56. To each of these projections 56 is secured a slat or vane 51. Asr shown' they are bolted in place by 53, which may be generally solid, provided at their centers with hubs 54, at their outer edges with As shown particularly in bolts 58 but might be otherwise secured. The slats or vanes are the actual impeller parts. They are removable for repair or to permit the substitution of larger or smaller vanes which may be of any desired shape or contour. By the substitution of wide varies the total diameter of the rotor I.impeller is altered. Other adjustments and changes will suggest themselves.

It will be realized that whereas I have herewith shown and described a practical operative device, nevertheless many changes might be made in the size, shape,.number and disposition of the parts without departinlT from the spirit of the invention and I wish, therefore, that my showing be taken as in a sense diagrammatic.

In particular the details of the screen structure and its assembly Vmight be changed. There might be but a single chute. The shape and disposition of the screen might be altered. The vibrator means might be omitted or other vibratory means used, but in general there will be some such an assembly and it lies partially within and preferably extends partially outside of the main housing 4 which is' apertured suitably to permit the proper positioning of the assembly and the proper discharge of material from it. As shownythe screen and chute assembly is heldin place by bolts which pass through suitably aligned perforations in the members 31, 38 and 39. Obviously, these parts might beriveted or otherwise fastened together. f

The'use and operation of the invention are as follows:

With the device generally as shown, carried on any suitable support or foundation, sand or other analogous material for classification and treatment yis conveyed to the treating zone by a belt conveyor I or otherwise. With the mechanism in operation the impeller is rotating in the direction of the curved arrow shown upon it in Figure 1. I'he materiall falling from the conveyor or otherwise into the impelling zone is struck by the vanes and driven to the-right as shown in Figure 1. The heavier particles carry farther than the lighter particles. The heavier particles thus carry above the plate 3| and the lighter particles fall belowl it. The plate is initiallyadjusted to effect the desired separation. All the material that passes above the plate either falls directly upon the bar-screen or is guided to it by striking the baffle I9. The plate and the screen are preferably'vibrated and the heavier particles are discharged over the screen through the chute 23 or 24 and as they move outwardly they displace the curtains 34 suficiently to permit them to pass. What sand is'carried with the heavy particles onto the screen is separated from them and falls through the screen directly onto the sand conveyor '|0.

The lighter sand which does not carry to the plate 3| falls directly onto the clean sand conveyor as shown in Figure 1 and moves with that conveyor toward the discharge opening I6 ofthe housing. This sand current or stream displaces the curtain I1 sufliciently to permit its outward passage. The movement of the rotary impeller acts as a fan, drawing air into the housing and discharging it through the vent 6. Thus dust and light impuritiesare carried upwardly and out of the housing and vented toany desirable point. Inthis manner the sand is cleaned of the eX- tremely light particles of impurities. The various other openings to the housing are sealed by the members 9, I3 and I1 on the bottom and by the curtains 34 at the discharge chutes.

`Adjustment is generally provided for;A In the impeller 'adjustment is made by movingthe shaft backward and forward to the desired position and by changing oradjusting the positionof` theim- `pellerslats or vanes. Theclassication is,V controlled by` adjusting the plate`3l. Thespeed of `the'impeller itself is `alsofadjustable.4 The seal Aing members', particularly the sealing members 9 Figure 2th`e members I3 are slotted and pro-v videdwith` adjustable engaging parts.` i Any other Vsuitable'adjustment:may beprovided. C f` @The Hhousingvitself is`adjustab1e as `to shap sincethe section if might be removed and the belt `l` l `correspondingly adjusted to;move in a horizon,-V`

` ranged to dischargeto a stationary means.` The vibration impartedto the screen'and chute assembly makes thes'creening operation success ful `and prevents cloggingof material on "the f chutes because they" are constantly vibrated and material is therefore discharged along them. It

` 24` begin only atfthe `edgesof the screen"22 so that material passingthrough the screen does not passinto the chute sections but is separated from materialgwhich passes over thefscreen. i

The device shown in itsoperation thus provide u: 1 `.means forfseparating from the sand the metall i itrernely"` light `impurities `by pneumatic action, sincethe air pressure setup is vented'through the vent 6 andthe stream of air which moves rates'from `the sand the extremely light impuri-` ties; The sand isthus completely cleaned and reconditioned vfor furtheruse. i

Air pressure might beset up `within the housing bymeans other than` the impellensuch,` as a blower. Itis ordinarily convenient,however,` `touse theimpelle'r to accomplish the dual purpose of striking and driving the sand and other),

current of air to effect the cleaning and air separation desired. i Meansrnay be provided in vent 6 `to regulate the quantity of` fine impurities to be removed. i This machine is adapted for use generally upon granular material, sand, "cinders or any other mav terial which can be treated, and wherein the specrial"oc'curs` it is to" be understood as including i u; notxmerely sand but other material susceptible i B5 to treatment by the machine herein described` and |`3 are adjustable, forV exampleas showninx` tal or" approximately horizontal plane, `or var-w isto be understood that the chute sections 23 and and other heavy` particles by direct mechanical .Y action `ancl providesmeans `for separating theexthroughthe` vent carries `with it and thus sepaparticles as wellas that of setting up a sufcient i i ication and claims theword ,sandf or mate- I claim: 1. In combination in paratus, a husingmeansfor discharging materotary impeller positioned to strike the incoming material, a stationary means positioned to receive material from `the impeller, screenk means for receiving heavylparticles from the impeller and'for classifying theml from the material `carried with* them, and for discharging `them separately in a `direction away from the mainjbody of material, said classifying and discharging means compris- 1 ing anfassembly supported upon the housing for relative movement with respect thereto.

2. `In combination in a material treatment `apparatus, ahousing, means for discharging mate- `rial to `said-"housingand for reconditioning it therein, said reconditioningmeans comprisinga rotaryimpeller positioned to striketheiincoming l material, astationary means positioned to receive material from the impeller, ,screen means for re. 1 ceiving'heavy particles fromthe impeller and for d classifying them from the material carriedfwith i them, and for discharging them separately `in a direction away from vthe main `body of material,` 'said classifying and `dischargingmeans compris- `ingan assemblysupported upon` the housing for relative` movement `with respect thereto, and

means positionedv upon said assembly for vibrating it.

f3. In combination in asand or analogous material treatment apparatus, a housing, means for dischargingV material `to said housing and fori` reconditioningv it therein, said Vreconditioning means comprising a rotary drum impeller within.

the housing and positioned to strike theincoming material, means positioned to receive material fromthe impeller, and pneumatic means includingsaidimpeller for carrying off thegparticles lighter than the said materialawayfrom` the main body of material.

4. In combination in a material treatment apparatus, ahousing,` means for discharging material to said housing and for reconditioning it therein, said reconditioning meansrcomprisinga rotary impeller positioned to strikethe incoming material, means positioned to receive materiali from the impeller, means for receiving heavy par-v ticles from the impeller and for classifying them a material .treatment` ap-` `rial to said housing and for reconditioning it therein, said reconditioning means comprising ai discharging them separatelyin a direction away .fromthe main body of material, and means for vibrating said classifying means.

ROBERT J.\HEISSERMAN.

vv from the material carried with them, and for

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