US2510764A - Liquid-extracting press for drying fibrous materials - Google Patents

Description

LIQUID EXTRACTING PRESS FOR DRYING FIBROUS MATERIALS Filed Sept. 14, 1945 J. STADLER June 6, 1950 2 Sheets-Sheet 1 INVENTOR JOHN STADLER BY ATTORNEYS June. 6, 50 J. STADLER 2,510,764

I LIQUID EXTRACTING PRESS FOR DRYING F'IBROUS MATERIALS Filed Sept. 14, 1945 2 Sheets-Sheet 2 INVEHTOR uol-m- STAPLER QM QM hm" 6mm mm features; of 1 the int/e Patented June 6, 1950 meg;

This ihventionu'elates toremoval of liquid from SOIidSby subjecting the latter to c'cmpres sioh. in a high-pressure pow'er'p essof the cylindel and piston tyiie. h I

The object" of the iriventio i' is togp'r'ovid'e an improved liquid extracting'press of the above mentioned type inv which the material is compressed in a more'effioient manner lffiSLlltlllg in the economical r'em'ovaloi a'suhstantially greater aiiimiht of liquidthan is possible with the best typeso'f-presses'no-w in use.

According to this'invention the cylihder is equipiecl witha' dmi age lining-win h smrou ds and; is spaced. from a ptessure -intensifying drainage, 'coiie' 'an anged with its smalle reacted tows-fallout terminating short of the entrance e 'dof the cylinder intowhichthe'mat rial tobe compressed is intermittently inti d-uc'ecl through a suitable inlet; The cone and the su "iouhclih g' cylinder liniiag conjointly pro-3 vide an iula r compressiori zone of gradually decreasing area'towardthe-discharge endoff the cylinder. nfzaterial is'iforcecl rearwar'cliy' j through the annular compi'es sio i zone under continuously increasing con pressioi pressure by means of a; high pressu 'e' gow'era ctuatepl pisto recipi ccat in m me of the cylinder log-1 cate d'fql laidly ofsaidfcohe; The pistonis opg erated'hy' a. power-actuatedtoggle or other force transmitting ie'chaiiisin through whichthe force applied to thepisto 'is i creased'to a im'um value esthe p'iston nea rs'the -endofits \vo game. lllli tl'ithig arra-zigemerit, them 55 terial is forced through the annulap comp! siori-z he in the form out ej cyliridricalmassythe 0y? a1 via-l1 of whichi graduallyeecrea" in thickness "by; cohtinuou ly i creasi g ad compression thereof betweenthe co1 yeifgiiig cle walls of saicl zone.; Thisprovigles the'op tin L n con'litioiis fo the most effective-use oi the; c'o'fiiiiressiofi e the mate; ria'l-to'ieizioifhqm shiceftheleng h of'thepath f "-ieht e'liquid r n st travelth 'oughthe mat-e1 ifth'e' cli'einagefofieiii w Y w drifimmi m eti mt tie stse ieq t "hum compression pressure during" its' passage v through thg'colflpressioh? zo Gthei ohjects j-aovahtages a cl chara i ieticf following detail d; gl'escrlp v V E iT-w ith the accompanyin-g drajvihsin which? i i ui e' -iis Che loo- 4m F u e? sga vertic ns w 7 view taken 'ibstantially aloiig the section; line 2- 2 of" Figure 1.

eu' cB s atfe 'ss e ti l btt i w taken uhstantially along the section line 3-3 r cz- I w F e? i @i em b j trel sye s 've t eli ctionalyietv whiqh is' taken'pa 'tly along the sezea tion lin'e B Bgnil partly along thesection line C-Q of Figure 2. u @is a cylindeifl-iis leftopen to provide amoutletfl m h wh h t e; .maete ie s ar a the liquidhas 'heen exti acted therefrom; In the present nstahce'cylinde 5 is shownmounted' in place between a' E-E 1il of supporting channels whiohalsq support other press elements herein er referr itc, i i

Thatportion of cylinder 5 which lies between inlet 6 and" outlet 3 is' provideq withiadrainage I lining consisting 0f ri igs 9f arranged; inside by side relation to provide intervening drainage; slots HI: cormoiunicatingwith longitudinally extending ain h rin szi 1!. pr vide g the rii l 'suriacepfthecylinclezf, The-channels ii are inrwnnr te y whe a ch l 1i? ec ,2). so that all; the ater which is forc e d'into saiol channels through the dr ainage slots i9 is clelivered' to "suitable drain 00111160121011? ltfa cli Cylinder Sisalso equipped withaveritjfiflwhich lfhe lillgs 9 are 'clampedf in place "between u cutting g ipg lfi'locatedinn ediately adjacent in; let [6 and clamping ring 5 i which is fastened to the cylir cle at'jthe giischargeor outlet encl The body pol tion' of each rihg 'is provided w h laterally directed spacers l 9 \vhich are' j engaged withxan adjace t' ring to 'maintain the spaeiu'g 0f th .r scne e sar to o e I-th dra n e slots J EB The-spacers IEof thering nearest the j outlet ll engage the clampingwing' ll hut'the spacers of each oi the remainin drainage rings 9 fengaigefthe" body portion of an adjacent drainage ring;

'nai sectional reed detail View of a'poi tioh i of the press eylinder, r encl di 15"" atl q the d a' wii e t With the exception of the drainage ring butted against the cutting ring IS, the inner corner of that side of each ring which is nearest inlet e is bevelled at an angle of approximately 45 to provide a corner surface 2| which slopes inwardly and rearwardly toward the discharge opening a. At the side remote from inlet E5, the inner corner portion of each drainage ring 9 is extended to provide a lip 22 having its outer annular surface 23 bevelled so that it inclines inwardly and rearwardly toward the discharge opening I. A portion of the bevelled lip surface 23 of each ring 9 is opposed to the bevelled corner surface 2! of the next succeeding ring 9 to provide a restricted entrance for the drainage slot it provided by and between said rings.

A pressure intensifying drainage cone 25 is arranged in cylinder with the smaller end of the cone directed toward but terminating a substantial distance short of the inlet 6. Cone comprises a hollow conical core member 25 mounted on a combined supporting and fastening rod 2? which is provided at its front end with a pointed enlargement 28 which constitutes the tip of the cone. A plurality of drainage rings 28 are mounted on the core member 2%; and are clamped in place between the pointed enlargement 2% of rod 2? and a shoulder 28 of the core member. The rear end of the core member 28 is butted against a plate formed integral with the front end of a tubular casting ill which is in communication with the hollow interior of core member 26 and is provided with a drain connection 32. The rod 2? extends rearwardly through the casting 3i and is equipped with a clamping nut 32 which is tightened to clamp the drainage rings 28 against the shoulder 29 and to also clamp the rear end of the core member 26 tightly against the plate 3%). The surface portion of core member 26 on which the drainage rings 28 are mounted is provided with longitudi nally extending channels 33 communicating through radial openings 34 with the hollow of the core member. The drainage rings associated with the core member 26 are constructed in substantially the same manner as the previously mentioned drainage rings 9. One outer corner portion of each ring 28 is extended to provide a lip 52% provided with a bevelled inner surface 3? which inclines outwardly and rearwardly toward the discharge orifice l and overlies a cor respondingly inclined surface 38 formed by bevelling the adjacent outer corner portion of the next succeeding ring. This description applies to all the rings 28 with the exception of the end rings. In the case of the end ring abutting the cone tip 28, the sloping of the leading outer corner portion of the ring is omitted. In the case of the end ring abutting the shoulder 29, the lip formation 36 is omitted.

The tubular casting 3i forms part of a cast frame structure til which is positioned between and supported by the channels 8. As clearly shown in Fig. 2 the drainage lining of cylinder 5 and the drainage cone 25 conjointly provide an annular compression zone 12,2 of gradually decreasing area toward the discharge outlet 5.

The material introduced into the cylinder through the inlet 6 is forced rearwardly through its annular compression zone 2 by means of a high pressure piston 64 which reciprocates in the portion of the cylinder located forwardly of the cone 25.

When the piston is in the retracted position shown in Fig. 2 a charge of material is introduced into the entrance end of the cylinder through the inlet 6. During the working stroke of the piston a cutting ring 45 carried thereby cooperates with the previously mentioned Cutting ring Hi to separate the inserted charge of material from excess material which is subsequently introduced into the cylinder when the piston is again retracted to the end of its return stroke. The repeated reciprocation of the piston causes the material to be forced rearwardly through the annular high compression zone 42 toward the discharge outlet 7. During its passage through zone 42, the material is formed into an annular mass, the wall thickness of which is constantly decreased by continuously increasing radial compression thereof between the converging defining walls of said zone. It will thus be seen that the annular mass of material being forced through the annular high compression zone is subjected to the greatest compression at that point in said zone where the wall thickness of the annular mass is reduced to a minimum to provide the shortest path for the flow of liquid through the mass to the drainage openings of the cyinder lining and the pressure intensifying cone. I will thus be seen that the invention provides the optimum conditions for the most effective use of the compression pressure applied to the material to expel the liquid therefrom.

The material, from which the liquid has been extracted, issues through the discharge opening 1 in the form of an annular ring which is forced against the cut t ing edge of a triangular cutting knife ll'i fastened to the plate 33 with its cutting edge or apex opposed to the upper portion of said discharge opening. As the ring of material is cut by this knife, it collapses and falls downwardly through the space reserved between the discharge end of the cylinder and the plate 30.

Part of the water forced from the material during its passage through the cylinder 5 is forced outwardly through the drainage openings l9 between the cylinder lining rings 9 into the channels H and 12, from whence it is delivered to the drain connections i3 and lac. Another part of the water expelled from the material by compression between the cylinder lining rings 9 and the cone 25 flows through the drainage spaces 28a between the cone rings 28 into the cone channels 33 from whence it passes through the openings 35 and hollow interior of the core member 26 to the drain casting 3! which, as pre viously stated, is equipped with a drain connection-32.

The piston is encounters the maximum resistance as it nears the end of each working stroke. In order to ensure a reasonable normal power consumption when the piston is working against the maximum resistance, I provide a toggle mechanism 56 through which power is applied to the piston from the main crank shaft 5| so that the maximum force is transmitted to the piston when the latter is nearing the end of its working stroke and is encountering the maximum resistance. This toggle mechanism comprises a pair of toggle members 52 and 53 having corresponding ends connected to a swinging shaft 56 carried at the lower end of a connecting rod 55 having its upper end 56 fastened to the crank 5'6 of the main crank shaft 5|. The other end of toggle arm 52 is connected to a stationary shaft 58 carried by a shaft supporting bracket 58 supported in place between the channel members 8. The remaining end of toggle arm 53 is connected to a travelling crosshead shaft 60 which, together with the cross heads 6|, is rigidly secured to piston 44 to travel therewith, the cross heads 6| being fitted in cross head guides 62 carried by the channel members 8. The crank shaft 5! is driven by gearing 64 from a, slow speed counters'hait 65 which, in turn, is driven by gearing 68 from a high speed countershaft 61 equipped with a pulleyr68 or other means for driving it from a suitable prime mover. During rotation of the main crank shaft 5|, the piston is operated by the toggle mechanism 50 so that the greatest power is applied to the piston through the toggle mechanism as the piston nears the end of its working stroke.

Liquid-extracting presses constructed in accordance with the invention described herein may be efliciently employed in all cases where high pressure power compression of moist or liquid-saturated bark or other fibrous material must be resorted to in order to extract a suflicient amount of liquid to permit economical use of the material for fuel or other industrial purposes. Owing to the eflicient manner in which the material is compressed during its travel through the water-draining high-compression zone afi'orded by the water-draining cylinder lining and the opposing pressure-intensifying draining cone, the amount of water extracted from the material far exceeds the amount of water that can be extracted by any other press of comparable capacity and power consumption.

Having thus described the nature of my invention and what I now conceive to be the preferred mechanical embodiment, it will be understood that various modifications may be resorted to within the scope and spirit of the invention as defined by the appended claim.

Having thus described my invention, what I claim is:

A high-pressure liquid-extracting power press comprising a cylinder provided with a material inlet near one end and being open at the opposite end to provide a material discharge outlet,

a drainage lining extending around the inner wall portion of the cylinder located between the inlet and the outlet, said lining consisting of a plurality of drainage rings arranged in side by side relation to define intervening drainage slots communicating with drainage channels provided in the inner wall surface of the cylinder, a drainage cone arranged in said cylinder with the smaller end of the cone directed toward but terminating short of said inlet, said drainage cone comprising a conical core member provided with drainage channels and a plurality oi drainage rings arranged on said core in side by side relation to define intervening drainage slots communicating with the drainage channels of said core, said latter drainage rings being or gradually larger diameter toward the base of the drainage cone, a triangular cutter arranged externally of but directly opposite said discharge outlet and having its apex directed toward said outlet, and a high-pressure power-actuated reciprocating piston working in the portion of the cylinder located forwardly of the-tip of said drainage cone, said press being characterized in that the drainage rings of the cylinder and the drainage cone conjointly provide an annular high-pressure compression zone of gradually decreasing area'toward said discharge outlet. JOHN STADLER.

REFERENCE S CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 332,718 Lafierty Dec. 22, 1885 715,409 McBride Dec. 9, 1902 1,545,818 Elfstrum et al. July 14, 1925 1,550,045 Power Aug. 18, 1925 1,884,212 Power Oct. 25, 1932 1,990,839 Power Feb. 12, 1935 2,063,367 a De La Roza, Sr Dec. 8, 1936

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