US1771581A - Digester support - Google Patents

Description

J y 1 9.6. MOON "1,771,581

DIGESTER I SUVPROR'I r 2 Sheets-Shea; 2

Filed Aug. 1, 1929 INI/ENTOR DORE/EN 6. 00A! WITNESS Patented July 29 1930 if I entree s're' f 1 A E T- DORRIEN a. Moon, or :L'ARcHMoNT, New YORK, AssIeNon. TO CONTINENTAL repea AND eneoonronn'rroiv, or new YORK, n. 'Y., A CORPORATION on NEW YORK.

DIGESTER surronr Application. filed August 1, 1929; Serial N'o. 382,683.:

My invention relates to an apparatus for cooking wood or other fibrous'materials used in paper making, usually designated a digestei"., andmore particularly, to a'support therefor. It has for its ob ect to provldean improved digester support of sturdy constrnction capable-of withstanding the continued and hard usage to which suchdigest ing apparatus is subjected. A further object l( advantageous factors contributing to the failure, withln a comparatlvely short space f'use,of the dlgesters nowin use. The continued vibration attendant theoperation of.

1 the cooking apparatus ord'igester, tends to soon weaken the structure supporting it, par ticularlyat the points at which said digester is joined, usually by riveting ,to the support. Such riveted ointsbetween digester and support are weakened or are very easily broken down with the result, usually, of a leaking joint through which the contents of the digester may trickle and further disintegrate the joint by the action of the chemicals used therein. The apparatus of the instant invention is designed to overcome these defects by the elimination of the riveted joint be tween digester and support and presents a new and improved digestersupporting structure. The invention resides'in a combination ofelements, the novel features whereof will appear more particularly from the description hereinafter and from reference to the accompanying drawings forming part of this specification. r I

In such drawings, Fig. 1 is a plan View of my improved support with the digester in position; Fig. 2 is a front elevation thereof;

Fig. 3 is an enlarged plan detail of one of 1: the cradle brackets of the support; and Fig.

4 is an enlarged detail in elevation of one of the columns with a somewhat modified form of bracket. Fig. 1 may also be described as a section along line l1 of Fig. 2.

Referring more particularly to the drawings, the digester shell 10, which may be of any shape and construction, the usual cone type being illustrated, is positioned on cast steel brackets 11, having an inner surface configuration corresponding to the curviii of the invention is to eliminate certain disature of the digester shell. TheLbracketsIT havea contact surface at an anglecorrespond ing to the angle of inclination of the side of the vessel which they support. These brackets are mounted on cast iron columns I 12 of any suitable number, fourbeing usually sufficientto form a rigid-supportingstruc ture. The size and weight of the"dige'st'erv will, of course, in all casesgovernthe number of supporting columns and their dimensions. The columns 12 terminate, atytheir' lower extremities, in foundationplateslii having the'usual angular ribs14. At their upper ends, a channel platform 15 presents the sup porting surface on which the brackets 11 rest (75 i and to whichfthe latter may be secured by bolts 16 havingtheir heads lTWithinthe hollow interior ofrthe brackets, and nuts 18 applied thereto within the channels of plat-j forms 15 into which said bolts extend. .1 s

Each of the brackets lliis provided with i an integral pair orpluralitybfpairsof an- 5 chor members 19 for engaging the threaded ends of tie-rods 20. Nuts 21"arethreaded on such tie-rods before the latteri are positioned within such anchor members, nuts 22 being: applied thereto thereafter. Allfof said nut's21 and22 are then tighten'edso as to connect the brackets ;11 rigidlyto each other in fixed spaced relationship and into 0. a unitarystructure by means of tie-rods as will clearly appear from the drawings. The anchor members are atanjangle to each other depending upon the number offsup porting columns used, as will also be" ob; vious from an inspection of. the drawings.- The use of a double row of anchor members, as shown, further increasesthe rigidityof the supporting structure and contributes to its capacity to withstand'hard usage. i

As shown in Fig. 3, the bracket surface engaging the digester shell is decreased bya depression 23 presenting only the edge portions an d 25 for contact with the shell. This construction yields an advantageous? cradling effect in supporting the digester whereby a bettercont-act between di'gesterand bracket is-obtained obviating the necessity of having the inner surface configure-' tion of the bracket correspond exactly to the curvature of the digester and eliminating a possible point contact instead of the desired surface contact.

It will be apparent from a consideration of the structure hereinabove.described that the bracing construction forming an important feature of my inventionresults in certain definite advantages not present in existing apparatus such, for instance, as employiivetingas a means of joining the'digester shell to itssupp'orting structure. In the-course of cooking the materials such as wood, rags,

and similar fibrous materials, certain chemical substances, either acid or alkaline, are.

placed within the digester. The use of such chemicals necessitates the provision of the digester witha lining of; a .material which will resist the action of such chemicals. Through the continued vibration attendant the operation of the digester, any kind of joint between thedigester .shell and. support, and

herein described andjllustrated, Ijobtain a construction, of digester supporting apparatus which is. possessed of particular strength,

durability, and rigidity capable of withstanding the continuous shocks andpoun'd ing, to which the digester shell and support is necessarily subjected. Furthermore, the simplicity of. theassembly of my braced supporting structure facilitates repairs that may be necessary either to the digester itself or to thesupporting apparatus. The'digester may be-easily lifted from the supportingstructure and v repairs made thereon. Any form of joint between digester and support, particularly the riveting means now employed pre- =clndesjrepairs on the digester independently of the supporting, apparatus.

While I have described and shown aparti'cularI'embodimen-t of my invention, it is obvious that various changes indesign and construction of'the variousparts maybe made without. departing vention;

I'claim; 1.-A digester support comprising a plurality of columns. brackets mounted. thereon for-supporting the digester shell and tiefrom the spirit ofthe inrods connecting; said brackets.

2 A digesterrsupport comprising a plurality, of columns, brackets detachably "mounted thereon for supporting the digester shell and tie-rods connecting said brackets.

3. A digester support comprising a plurality of columns, brackets mounted thereon for supporting the digester shell and'having contact surfaces corresponding in configuration to the curvature of the exterior of said shell, and tie-rods connecting said brackets.

4. A digester support comprising a plurality: of columns, brackets mounted thereon for supporting the digester shell, a plurality of anchor memberson each of said brackets, and tie-rods for connecting the anchor members of adjacent brackets.

5. A digester support comprising a plurality of; columns, bracket-s mounted thereon for supporting the digester shell, a plurality of anchor members on each of said brackets, and tierodsthreaded at both ends and adapted to receive nuts for engaging them to said anchor members. i

6. The comblnation, w th a digester, of a support therefor comprising a plurality of supporting columns, brackets mounted thereon't'o cradle the digester shell, and tie-rods connecting said brackets.

,7, A digester support comprising a plurality of vertical columns terminating at their upper endsin brackets supporting the digester vessel betweensaid columns to move freely thereon, and tie-rods, for connecting said brackets and adapted to keep said brackets in fixed spaced relationship.

DORRIEN. ,G, MOON.

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