US2660050A

US2660050A - Sectionally supported furnace wall

Info

Publication number: US2660050A
Application number: US787740A
Authority: US
Inventors: Louis H Hosbein; Ellman Louis
Original assignee: MH Detrick Co
Current assignee: MH Detrick Co
Priority date: 1947-11-24
Filing date: 1947-11-24
Publication date: 1953-11-24
Anticipated expiration: 1970-11-24

Description

Nov. 24, 1953 Filed NOV.`24, 1947 L.H.HOSBEN ETAL SECTIONALLY SUPPORTED FURNACE WALL 5 Sheets-Sheet l L. H. HOSBEIN ET AL `SEICTIONLLY SUPPORTED FURNACE WALL Nov. 24, 1953 5 Sheets-Sheet 2 Filed Nov. 24, 1947 lrv Nov. 24, 1953y l.. H. HOSBEIN ET A1.

SECTIONALLY suPPoRTED FURNACE WALL.

5 Sheets-Sheet 5 Filed NOV. 24, 1947 NOV. 24, 1953 H. HosBElN ET AL SECTIONALLY SUPPORTED FURNACE WALL AFiled Nov. 24, 1947 5 Sheets-Sheet 4 Nov. .24,7 1953 L. H. HOSBEIN ET AL SECTIONALLY SUPPORTED FURNACE WALL Filed NOV. 24, 1947 l iw .WH I

5 Sheets-Sheet 5 [alzzzlsff Hosez'n ouali Zimczn Patented Nov. 24, 1953 SECTIONALLY SUPPORTED FURNACE WALL Louis H. Hosbein, Glencoe, Ill., and Louis Ellman,

Pittsburgh, Pa., assignors to M. H. Detrick Company, Chicago, Ill., a corporation of Delaware Application November 24, 1947, Serial No. 787,740

Claims. (Cl. 72-101) Our invention relates to furnace wall structure, and more particularly to an insulated wall structure of refractory members.

Our invention relates particularly to a furnace wall construction in which the refractory members are exposed to the high temperatures encountered in furnaces and which are, preferably, sectionally supported by means of a metallic framework, which metallic framework is so related to the refractory wall forming members as to be in a position remote from the high temperature zone in which the refractory members are located, and it is a particular purpose of our invention to provide refractory connecting members between the metallic framework and the refractory wall forming members, which are in the form of refractory bracket members, and which are so constructed and arranged that a thick layer of heat insulating material will be interposed between the wall forming members and any metallic parts that are utilized for supporting the wall.

In order to accomplish this purpose the refractory bracket members that connect the metallic structure with the wall forming members are made relatively narrow or thin as compared with the refractory wall forming members which the same support, and in order that said refractory bracket members will have the necessary strength to properly support the wall forming members said refractory bracket members are, preferably, made of the form of the refractory hanger members disclosed in our Patent No. 2,387,663, patented October 23, 1945, on Furnace Arch or Roof Construction. As the refractory bracket members are able to withstand higher temperatures than metallic bracket members previously used for this purpose, our invention enables furnaces to be operated at higher temperatures than would otherwise be possible, or if operated at the usual temperatures, the construction forming the subject matter of this invention enables furnaces to be operated for much longer periods without requiring repair or replacement. u

It is a specific purpose of our invention to provide a structure whereby the wall of refractory members that is exposed to high heat of the furnace can be more effectively heat insulated than has been previously possible. By the use of our improved wall construction utilizing the refractory bracket members which constitute spacing and supporting members, which space the metalllic structure from the refractory wall forming members and support said wall forming members from the metallic structure, large areas of the outer faces of the wall forming members can be provided with a thick layer of insulating material that extends to the metallic outer framework on which the entire structure is mounted.

This is particularly true in our improved wall construction because the wall is sectionally supported on metallic bracket members that have shelf-like portions with which the refractory bracket members are engaged that support the refractory wall forming members.

Said refractory bracket members that are mounted on the brackets having the shelf-like members are arranged in rows substantially horizontally of the wall and are rather widely spaced apart from each other vertically, but are so spaced in the rows in which the same are arranged horizontally that the wall forming members that are connected with said bracket members are each engaged by one of said bracket members on each side thereof, said wall being further provided with refractory bracket members that are connected with the framework and with the wall forming members, which are located between the refractory bracket members mounted on said metallic brackets that have the shelf-like supporting members thereon, and which are much more Widely spaced horizontally from each other than the refractory bracket members that are mounted on said shelf-like members. As a result a plurality of the wall forming members between each pair of said last mentioned refractory bracket members do not have any refractory bracket members mounted between the same and the metallic framework, but the entire area on the outer or rear side of said wall forming members has a thick mass of heat insulating material between it and the metallic supporting means, which provides much more effective heat insulation for the wall than would otherwise be possible.

It is a further important purpose of our invention to provide a refractory bracket member, which is suitably formed for connecting the same with metallic bracket members for retaining the same on a metallic framework and with suitable means for inter-connecting said refractory bracketmembers with refractory wall forming membersy that is so constructed that it will have a portion of maximum thickness and thus of maximum strength that extends from the portion thereof inter-connected with the wall forming members to the portion thereof that is connected with the metallic framework. Preferably, said bracket members have a portion of such maximum thickness extending from the extreme inner refractory bracket members that connectV the' metallic framework with the.. refractory' wall' forming members, which space the refractory wall from the metallic structure; anda support.

said wall forming members, which refractory bracket members can be easily replaced'v individually without disturbing any substantial portion of theV furnace wall or thel metallic supporting structure.

Other objects and' advantages of our invention will appear as the description of the drawings proceeds'. We desire to have it understood; however, that wo do not'intrend to limit ourselves to the particular details shown or described, except as defined in the claims;

In the drawings:

Fig; 1 is a fragmentary perspective`- view-l of a furnace' wallmad'ef in accordancel with our' fnvention. Y Y A Y Fig. 2 is' a fragmentary vertical sectional view through a portion of said furnace wall.

Fig; 3 is a fragmentary horizontal sectional View taken substantially on thev linel 3-3 of Y Fig. 2.

Fig. 4 is a fragmentary rear or outer face-view of our improved wall construction.

Fig; 5 is av fragmentary' horizontal sectional view taken on the line 5'-5 of Fig; 2;

Fig. 61is a perspective view ofi one of the re- Y iractoryl bracket members used' in our improved wall construction.

Fig'. '75 is a vertical sectional 'view' through a` metallicbracket supporting bar formingy part of the metallic structure of' our` wall construction, partly broken away showing' one ofthe retainingA brackets `in' position thereon.

Fig, 8 is` a faceV view, partly broken away, of said metallic bracket supporting bar;

Fig; 9 is a perspective view 'of one ci themetal brackets mounted' on the frameworky which has a supporting shelf; thereon.

Fig. 10 is a similar view of a slightlyl different form of such bracket. Y

Fig. 111 is a perspective view of the retaining bracket shown in Fig. '1; and

Fig. 12 is a perspective view of a retaining bracket such as used' with the bracket show-n in Figs. 9 and 10.

Referring in detail to the drawingsy our improved wall constructionv comprises a framework having vertically extending frame members 26 and horizontally extending frame members 2|,

which are secured to the vertically extending frame membersV in any suitable manner. The horizontally extending. frame members 2| have a bar 22 extending along one of the anges thereof to provide an upstanding flange on each of said` horizontally extending frame members and have bars 23 on the other flanges thereof to provide downwardly extending rib portions or anges on the lower iianges of said horizontally extending frame members 2|. Bars 24 are provided, which extend vertically and which have shoulders 25 and Z6 that are adapted to engage the flanges or

ribs

22 and 23, respectively, said bars also having hooks 2l' thereon that engage around the lower flanges of the horizontally extending frame members 2| to secure said bars 24 in position. The hook 2 is first engaged with theilower flangeof frame member. 2| and is then swungcounter-clockwise, as viewed in Figs. 1 and 2, to engage the reduced lower end portion thereof with the flange 2.2, and with the shoulder 25 engaging the; top: edge of the rib 22, and the shoulder 2li spaced from the bottom edge of the rib 273, as shown in dotted lines in Fig. 2.

The, retainer bars 2d are provided with a plurality of' longitudinally extending channels 2B therein. which. are; spaced from each other by transverse web portions 29. Each of said channelsl has a pair of inwardly extending lugs 3D provided between the ends thereof, which serve tosupport the. retaining brackets; 3|, the, angul'ar flanges Si.v on said retaining brackets being inter-engaged with the lugs til by inserting said bracket. portions 32V in the slots` 2S and moving the same into cooperative position with the lugs 3i). Said retaining brackets have a pair of inwardly or forwardly extending arms 33, which terminate in inwardly'extending iianges 34, thus forming hook-like. members which servev to retain the refractory bracket members` in a manner' to be described below.

Each of the. horizontally extending frame members 2| has a plurality of metallic bracket members s'mounted thereon, said bracketimembers 35 having a hook-like or channeled portion 3e that hooks over the flange 22 and having an outwardly extending fingeror foot portion 31 that engages the web portion ofthe member 2i. The bracket members 35 are mounted on the horizontally extending frame. members 2i between the points where the vertically extending retaining bars 24 are engaged' with said horizontal" framemembers. The. bracket members 35' shown in Fig'. 9, are. substantially the sarneas the bracket members 35, except that instead of` having the channel-shaped hook-like portions 36, said bracket membersV have the laterally extending flanges 38 thereon that engage back of a pair of inwardly extendingl lugs 30 that are provided in the lowermost channel 28 of each of the retaining bars to hold the same against outward movement. Both brackets are provided with the fingers 31 thatl engage the webs of the horizontally extending frame members 2|. Also both the

brackets

35 and 35 are provided with a T-head portion 39 back of which the transverse wall portion En of a bracket M lies when thek slot t2 in said bracket 4| is engaged with the portion s3 of either of said

brackets

35 or 35. The brackets il provide forwardly extending portions 33' and inwardly extending hook ends 34' corresponding to the

portions

33 and 34 of the brackets 3| for securing the refractory bracket members thereto.

Each of the

brackets

35 and 35 is also provided with an inwardly extending shelf-like portion lid. The shelf-like portions M' are provided to mount the refractory spacing brackets d5 thereon. Said refractory spacing brackets G5 are a block-like member having flat inner and outer end faces i5 and d1 and flat top and bottom faces i9 and 48, as well as flat side faces 59 and 5I. Thus there are plane end faces, plane top and bottom faces and plane side faces on said block. The side faces 5t and 5i have. a. pair of vertically' extending grooves 52 therein that lie opposite each other and a pair of shorter vertically extending grooves 53 therein that are separated from the grooves 52 by a connecting portion 54, which is of the maximum thickness of the block, said block being of a maximum thickness defined by the flat or plane side walls and 5I thereof. Thus there is a vertically extending portion of said spacing retainer bracket block which is of the maximum thickness of said block that lies on the outer side of the

grooves

52 and 53.

The inner end portion of the refractory spacing bracket 45 has a pair of oppositely disposed upwardly opening recesses 56 therein, which have inclined walls 5l and 58 and walls 59 that extend substantially perpendicularly to the bottom of said recess. A similar recess 6|] is provided in the refractory bracket block in vertical alignment with the recess 56 on each side of said refractory bracket members, said recess '60 being similarly shaped to the recesses 56, but opening downwardly instead of upwardly and being of less height than the recesses 56. Between said recesses 56 and S4 is a connecting portion GI, which is of the maximum thickness of the refractory bracket member, and a portion 52 of such maximum thickness extending vertically of the block lies between the recesses 56 and the grooves 52, and between the recesses 6u and the grooves 53. Similarly a vertically extending portion 53 of such maximum thickness is provided between the inner end face 46 of said refractory bracket member and the recesses 55 and 6U. Thus the portions 54 and 6| of maximum thickness connect the

portions

55, 62 and 63 of maximum thickness, which extend continuously from the bottom to the top face of each of said spacing bracket members. A portion of maximum thickness of the block thus extends from the inner face 4B thereof to the outer face 41 thereof.

The slots 52 receive the inwardly directed hook ends 34' of the retainer members 4|, While the fiat bottom face 48 of each of said blocks rests on the shelf-like member 44. The refractory bracket members will thus be firmly anchored in position on the metallic framework. The inwardly directed hook flanges 34 on the retainer members 33 similarly engage the slots 52 of the refractory spacing bracket members 45. Said refractory spacing bracket members 45' are in all respects similar to the spacing bracket members 45, but the alternate ones thereof are inverted from the position of the members 45, as will be obvious from Fig. 2, so that the slots 52 in adjoining members 45 will have the hook flanges 34 of the retainer bracket 3| engaged therewith, and thus one retainer bracket will retain a vertically adajcent pair of said refractory bracket members in position. Similarly the retainer members 4| project upwardly above the topsurfaces of the refractory spacing bracket members 45, as will be obvious from Figs. 1 and 2, so that the hook flanges 34 thereon will not only engage in the grooves 52 of the spacing bracket 45, but also in the grooves 52 of a bracket 45 mounted thereabove. The height of the spacing bracket members 45 and 45' relative to the length of the bars 24 is such that the central spacing bracket member 45' of a wall section in any vertical row of said members 45 and 45' will have a bracket member 3| for retaining the same alone.

Refractory wall forming members 64 have pro- 6 jections 66 and 61 thereon that are received in the

recesses

56 and 60 of the spacing bracket members 45. The projections 66 extend nearer to the lateral or side faces of the wall forming members 64 than the projections 61, or in other words, the connecting portion 63 between the body of the block and the projections 66 and 5l does not have its center line on the center line of the main body portion of the wall forming block 64. Accordingly by reversing the members 54 the vertically adjacent rows thereof can be staggered. Two vertically adjacent rows of the 'members 64 are connected with each refractory spacing bracket 45, and similarly two vertically adjacent rows of the wall forming members 64' are connected with each of the bracket members 45', the wall forming members 64' being of the same structure as the wall forming members 64, but being designated by a different reference numeral in order to bring out more clearly the differences in arrangement of the retaining or supporting means relative to the wall forming members, whereby large areas of the outer faces of the wall forming members have a thick layer of insulating material lying between the same and the metallic framework.

Referring to Fig. 5 it will be noted that there are other wall forming members 64" between the members 64', connected with the spacing bracket members 45', that are not connected with any of the framework at all, and not with any refractory spacing bracket members. This provides large areas on the outer faces 69 of the refractory members 64' and 64" that have a thick wall or layer of heat insulating material 'i0 provided between the same and the metallic supporting framework. Said insulating material is, preferably, an insulating cement, which fills not only the spaces between the various retaining and spacing brackets 45 and 45', but also the spaces between the portions of the wall forming members 64' and 64" that do not have any refractory spacing bracket members mounted therein. The insulating cement-like material also extends around the metallic retainer members 3| and between the top and bottom faces of adjacent spacing bracket members 45 and 45', as will be obvious from Figs. 2 and 5, and all the portions of said spacing brackets 45 and 45' extending outwardly beyond the inner faces 69 of the refractory Wall forming members 64 and 64' are embedded in said insulating material 79. Wherever large enough spaces exist between the various framework members, blocks 'H of insulating materialA are provided so as to provide a better nish for the outer surface of the wall than would be obtained by the cementlike material l0. The retainer bars 24 shown as located between the bars 24 that have the brackets 3| mounted thereon (see Fig. 4) serve merely to hold the insulating blocks 1| from outward movement.

Thus a wall is provided that has a thick layer of insulating material between all of the refractory members 64, that are exposed to the direct heat of the furnace, and all of the metallic parts of the supporting structure. Refractory spacing members that also serve as supporting means are provided between the wall forming members and the metallic supporting structure, which are of a generally rectangular character and are narrow or thin as compared with the refractory wall forming members, and have portions of the same uniform maximum thickness extending from the inner faces 45 to th'ou'ter faces 41 thereof; Al'soit will beY noted that' there is a portion of maximum thickness of said

spacing bracket members

45 and 45 that extends from the wall retaining portion 63 thereof to the portionV 55 thereof that is subjected to stress by the wall when engaged with the

portions

34 and 35 of the retainer brackets. The upper refractory wall forming block 54 connected with each spacing bracket member 45 not only is retained by means of the portions 53 of said spacing bracket member, but is supported by the portion 6I thereof of the maximum thickness of said bracket. The portions Bl of the spacing bracket members 45 act similarly. Thus each section of the wall is similarly supported by the maximum thickness portions I of the spacing brackets and the shelf-like members on the metallic bracket members 35 and 35' in cooperation with the hook flanges 3d' on the retainers lil mounted on said brackets 35 and 35'.

In order to provide an expansion joint in the structure, a layer of refractory cement 12 is provided between the upper and lower members of the vertically adjacent pairs of refractory wall forming members that are mounted on the refractory spacing brackets 55.

What we claim is:

l. A sectionally supported furnace wall, comprising a metallic framework, vertically spaced horizontal r-ows of horizontally spaced metallic brackets mounted on said framework, said metallic brackets having horizontal shelf portions thereon, horizontally spaced horizontally extending refractory spacing brackets mounted on said shelf portions, said refractory spacing brackets being interengaged near the outer ends thereof with the inner ends of said metallic brackets, horizontally extending wall forming refractcries intel-engaged adjacent their outer ends with and supported by said refractory spacing brackets near the inner ends thereof and extending inwardly therefrom, the interengaging means on said wall forming refractories and refractory brackets comprising lateral recesses and projections, a pair of horizontally adjacent wall forming refractories being supported by each of said refractory spacing brackets, vertical rows of metallic retainer members mounted on said framework between said vertically spaced rows of metallic Ybracketsy all portions of said metallic brackets and of said retainer members being spaced from said wall forming refractories, said vertical rows of retainer members being spaced much further apart horizontally than said brackets and aligning vertically with certain ones thereof, refractory spacing brackets interengaged near the outer ends thereof with the inner ends of said retainer from, a plurality of wall forming refractoriesA mounted between. refractories interengagd with said last mentioned refractory spacing brackets,

all of said wall forming refractories being duplicates, and heat insulating material extending from the outer ends of said wall forming refractories to said metallic framework and between all said metallic brackets and the outer face of said wall.

2. A furnace structure comprising a metal framework, a plurality of duplicate horizontally-,75

extending refractcrles formingV a vertical wall, means for sectionally supporting said refractories from said framework comprising horizontally extending rows of horizontally spaced horizontally extending refractory spacing brackets mounted between said wall forming refractories and said framework and spaced from said framework, said spacing brackets each having the major portion thereof lying outwardly of the outer face of said wall and having the inner end thereof lying outn wardly from the exposed face of said wall, vertically spaced horizontally extending rows of metallic bracket members detachably mounted on said framework, said metallic bracket members having all portions thereof spaced from said wall and having holding and supporting means engaging said spacing brackets in some of said horizontal rows in spaced relation to the outer face of said wall, said spacing brackets of each of said horizontal rows having vertically spaced upper and lower recesses in the sides thereof and a horizontal wall portion extending between said recesses, and said wall forming refractories including horizontal rows thereof located at vertically spaced positions in said wall, said wall forming refractories having lateral recesses engaged by said refractory spacing brackets and lat-eral projections seated in said upper recesses and engaging said horizontal wall portions of a corresponding'horizontal row of said spacing brackets to support all of said wall forming refractories of each of said last mentioned rows on said spacing brackets, with one of said wall forming refractories on each side of each of said spacing brackets, and heat insulating material extending from the outer ends of all said wall forming refractories to said metallic framework and between the inner ends of said metallic brackets and the outer face of said wall and having said refractory spacing brackets enclosed therein, all said framework being externally of said heat insulating material.

3. A sectionally supported wall, comprising a metallic framework, metallic brackets detachably mounted on' said framework, said metallic brackets having horizontal shelf portions thereon spaced from saidr framework, a plurality of duplicate horizontally extending refractories forming a vertical wall section, all portions of said metallic brackets being spaced from said refractories, and means for supporting said refractories forming said wall section comprising a horizontal row of horizontally spacedl horizontally extending refractory spacing brackets each having the major portion thereof lying outwardly of the outer face of said wall forming refractories and having a portion of maximum thickness extending from the inner endA thereof to the outer end thereof, said spacing brackets being mounted between said framework and said wall section forming refractories and in spaced relation to said framework, and engaging said wall forming refractories outwardly from the exposed face of said wall section, said spacing brackets being vertically slirably connected with said metallic brackets and mounted on said shelf portions, said spacing brackets having vertically spaced upper and lower recesses in the sides thereof and a horizontal wall portion extending between said recesses, and said wall forming refractories having lateral projections and recesses, the lateral projections of the bottom horizontal row of wall forming refractories of said wall section being seated in said upper recesses and engaging said horizontal wall portions and saidY spacing brackets engaging in said recesses in said'bottom row of wall forming refractories to support all of the wall forming refractories of the said bottom horizontal row of said section, said metallic brackets engaging said spacing brackets in spaced relation to said Wall forming refractories and all portions of said metallic brackets being spaced from said wall forming refractories.

4. A sectionally supported wall, comprising a metallic framework, metallic brackets detachably mounted on said framework, said metallic brackets having horizontal shelf portions thereon spaced from said framework, a plurality of duplicate horizontally extending refractories forming a vertical wall section, all portions of said metallic brackets being spaced from said refractories, and means for supporting said refractories forming said wall section comprising a horizontal row of horizontally spaced horizontally,7 extending refractory spacing brackets each having the major portion thereof lying outwardly of the outer face of said wall forming refractories and having a portion of maximum thickness extending from the inner end thereof to the outer end thereof, said spacing brackets being mounted between said framework and said wall section forming refractories and in spaced relation to said framework, and engaging said wall forming refractories outwardly from the exposed face of said Wall section, said spacing brackets being vertically slidably connected with said metallic brackets and mounted on said shelf portions, said spacing brackets having vertically spaced upper and lower recesses in the sides thereof and a horizontal wall portion extending between said recesses, and said wall forming refractories having lateral projections and recesses, the lateral projections of the lowest horizontal row of wall forming refractories of said wall section being seated in said upper recesses and engaging said horizontal wall portions, and said spacing brackets engaging in said recesses in said lowest row of wall forming refractories to support all of the wall forming refractories of said lowest horizontal row of said section, said metallic brackets engaging said spacing .brackets in spaced relation to said refractories and all portions of said metallic brackets being spaced from said wall forming refract-ories, and heat insulating material extending from the outer ends of said wall forming refractories to said metallic frame- Cil work and between the inner ends of said metallic versely of said wall, means for sectionally supporting said refractories from said framework comprising horizontally extending rows of horizontally spaced horizontally extending refractory spacing brackets mounted between said wall forming refractories and said framework and spaced from said framework, said spacing brackets each having the major portion thereof lying outwardly of the outer face of said wall and having the inner end thereof lying outwardly from the exposed face of said wall, vertically spaced horizontally extending rows of metallic bracket members detachably mounted on said framework, said metallic bracket members having all portions thereof spaced from said wall and having holding and supporting means engaging said spacing brackets in some of said horizontal rows in spaced relation to the outer face of said wall, said spacing .brackets of each of said horizontal rows having vertically spaced upper and lower recesses in the sides thereof and a horizontal wall portion extending between said recesses, and said wall forming refractories including horizontal rows thereof located at vertically spaced positions in said wall, said wall forming refractories having lateral recesses engaged by said brackets and lateral projections seated in said upper recesses and engaging said horizontal wall portions cf a corresponding horizontal row of said spacing brackets, and heat insulating material extending from the outer ends of all said wall forming refractories to said metallic framework and between the inner ends of said metallic brackets and the outer face of said wall and having said refractory spacing brackets enclosed therein, all said framework being externally of said heat insulating material, said spacing brackets being much narrower than said wall forming refractories, and each of said spacing brackets supporting a pair of horizontally adjacent refractories of one of said last mentioned horizontal rows thereof, all the refractories of each of said last mentioned horizontal rows being supported by said spacing brackets.

LOUIS H. HOSBEIN. LOUIS ELLMAN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,463,045 Lptak July 24, 1923 1,586,859 Strachota June l, 1926 1,692,134 McKenzie Nov. 20, 1928 1,847,436 McLean et al Mar. 1, 1932 2,007,038 De Wolf July 2, 1935 2,129,328 Lanyon Sept. 6, 1938 2,235,740 Fixman Mar. i8, 1941 2,255,803 Oifutt Sept. 16, 1941 2,328,907 Hosbein Sept. 7, 1943 2,341,971 Antill Feb. 15, 1944 2,387,663 Hosbein et a1 Oct. 23, 1945