US2110419A

US2110419A - Furnace wall construction

Info

Publication number: US2110419A
Application number: US86975A
Authority: US
Inventors: Louis H Hosbein
Original assignee: MH Detrick Co
Current assignee: MH Detrick Co
Priority date: 1936-06-24
Filing date: 1936-06-24
Publication date: 1938-03-08
Anticipated expiration: 1955-03-08

Description

March 8l, 1938- L. H. HOSBEIN FURNACE WALL CONSTRUCTION Filed June 24, 1956 Q a/@faw-V ZMH @5A/gem,

la@ y mung Patented Mar. 8, 1938 FUaNAcE 'WALL coNs'raUc'rIoN Louis H. Hosbein, Glencoe, lll., asslgnor to M. H. Detrick Company, Chicago, Ill., a corporation of Delaware Application June 24, 1336, Serial No. 86,975

15 Claims.

This invention relates to improvements in the construction of furnace walls of the type wherein' the furnace chamber wall is formed of refractory blocks or tiles which are supported on an external metallic framework.

One of the objects vof the present invention is the provision df an improved construction for supporting the wall in sections upon the metallic framework in such fashion that the refractory blocks and tiles which make up the sectionsare retained in proper position and may be assembled )inV the wall structure, and removed therefrom for purpose of replacement, with facility.

Another object is the provision of a construction which will be effective to minimize loss of heat through the wall.

A particular object is the provision of a construction wherein the refractory wall may be effectively insulated for the purpose of avoiding 2-0 loss of heat, and which is particularly adapted to facilitate the assembly of the construction and also the removal and replacement of the insulation and the wall refractories for purposes of inspection or repair.

VYet another object is the provision of an improved construction wherein-an external sheathing o'f plate or sheet sections is carried on the metallic framework in such fashion as to constitute an effective external covering or nish sheathing which may be assembled with facility and dismounted sectionally to afford access to the insulation and the wall refractories and the members whereby they are supported on the metallic supporting members.

' Other and further objects of the invention will be pointedl out or indicated hereinafter or will be apparent to one skilled in the art upon an understanding of the invention or its employment -in use.

For purpose of aiding in an explanation of the invention I show in the'accompanying drawing forming a part of this specification. and hereinafter describe, one form of structure in which the invention may be embodied. It is to be understood, however, that this is presented merely for purpose of illustration and hence is not to be construed in any fashion calculated to limit the appended claims short of the true and most comprehensive scope of the invention in the art.

In said drawing Fig. 1 is an exterior elevational view of a portion of a furnace' wall, some of the parts being shown in section and some of the parts being broken away to show interior parts;

Fig. 2 is a sectional view through a portion of (Cl. l2-401) such wall, the section being taken on approximately line 2-2 of Fig. 1;

Fig. 3 is a side elevational view of a slab-retaining member employed in the wall construction;

Fig. 4 is la detail-showing a section at line 4 4 of Fig. 1;

. Fig. 5 is a detail showing a section at line 5-5 of Fig. l; and y Fig. 6 is a face view of a refractory block tile employed in the construction.

An understanding of the invention will be most quickly had from a detailed explanation of the construction here illustrated, which will now be described.

The principal load-carrying members of the wall structure are columns I0, which are structural v steel members preferably of I-eross-sectional form. These are arranged in upright position at intervals along and exterior of the furnace 20 chamber and have suitable foundation support at their lower ends. To the inner anges Illa of the column members I0 are secured transverse frame members il, which extend horizontally from one column member to another. These transverse frame members are made of a suitable heat resistant material. such as cast iron, and are provided with top and bottom flanges extending both inwardly and outwardly, and also with4 an upwardly extending bracket-retaining flange I Ia. They are mountedf-on the ilanges Illa of the column members bymeans of bolts I2 which pass through said iianges, and they are provided with bolt holes IIb at intervals along their length. Each adjacent pair of column menibers thus supports a plurality of transverse frame members I I one above another at the side toward the furnaceY chamber.

On each of the transverse frame members I I is mounted a series of brackets or'hangers Il, which are made of a suitable strong heat resistant ma` terial such as cast iron. Each hanger comprises a plate-like body Portion having a hook I5 adapted to engagethe outer side of the flange IIa and rest on top of the horizontal supporting member II. The body portion also has a foot I6 adapted to abut the inwardly extending iiange at the lower edge of the frame member lI. 'I hus the bracket is supported in upright position on the transverse frame member. 'I'he -body member extends for a distance inwardly from the transverse frame member and is formed with a downwardly extended arm I1 and a narrow laterally projecting shelf Il at each side. At its inner margin the body portion and leg Il are provided i with laterally extending lugs I9, 2li, 2|, and 22 projecting from each side. The lugs |9 and 2| are in alignment with one another longitudinally of the body portion, while the

lugs

20 and 22 are likewise in alignment with each other but offset inwardly of the body portion from thealigned lugs I9 and 2|. These brackets, supported on the transverse frame members as above de- V Y scribed, are arranged with those on one frame member in verticalalignment with those on the subjacent or superjacent frame member.

The refractory wall is built up of refractory tiles which, for the most part, may be of the form shown in Fig. 6, with series of projections 24 and seats 25 on portions oi' their top, bottom and side faces. Adjacent their outer ends these tiles, which are designated by the numeral 23 in Fig.2, are provided with

lateral grooves

26 and 26a, the width of said grooves being but slightly in excess of the overall distance between the remote vertical sides of the bracket lugs 2li and 2|.

The arrangement of the refractories and brackets is in general the same as that shown and described in my copending application Serial No. 26,766, illed June 15, 1935 for Furnace. construction. The horizontally associated brackets I4 are spaced at intervals corresponding to the width of two of the tiles 23 and eachhorizontal row of brackets supports a wall section independently of the section below it. At the'bottom of each section is a row of base tiles 21, each of which is of sumcient width to span the distance between two of the brackets, its sides resting on the shelves I8 thereof. The tiles 21 are grooved at their sides, said grooves accommodating the lugs 20 and Ylowermost lugs 2| of the brackets. The lug 20 contacts one vside of the tile groove and the lug 2| the opposite side, and thereby the tile 2| is retained against tilting, its inner end portion projecting for a substantial distance inwardly from the brackets. 'I'he lowermost course of tiles 23 is laid on the tiles 21, said tiles being arranged in pairs between the adjacent brackets, the groove 26 of one tile-of the pair being engaged with the lug 22 and the intermediate lug 2| of one of the brackets, and the groove 26a of the other tile of the pair being likewise Vengaged with those lugs of the adjacent bracket. 'I'he tiles 2| extendinwardly fora substantial distance beyond the inner ends of the base tiles 21, and they are retained against tilting by engagement of the

lugs

22 and 2| with opposite sides of the tile grooves.

23 arranged as described in the above mentioned copending application, some ofthe tiles in the upper courses of the section being engaged with the lugs I9 of the superjacent brackets, and the projections and seats of thetiles in one course being intermeshed with those of the tilesl insub-4 jacent and superjacent courses. At the top of the section short tiles 23 ll the space between the inner ends of the base tiles 21 and the inner ends of the .tiles 23', and layers of refractory joint packing material 19 are interposed between the uppermost tiles in 'one section and the lowermost tiles of the superjacent section to seal the joint and allow for vertical expansion. By virtue of the intermeshing engagement of the tiles and theanchorage, connection of some of them-with brackets, the inner and outer ends of the tiles are retained in alignment vertically.

To insulate the refractory wall for the purpose of preventing loss of heat from the furnace cham- The section is then built on upwardly with additional courses of tiles spacing of the brackets.- 'I'he slabs are placed against the outer ends of the wall refractories, the slabs 39 resting at their lower ends on top of the brackets and the slabs 3| being disposed between the brackets and resting on top of the slabs 3l.

vThe slabs are retained in place against the wall refractories by holders 32.' These are rigid platelike members and may be made of cast iron. They are somewhat longer than the slabsJl, and on their backs or outer sides have wedge-shaped projections 32a. 'I'hese slab holders are inserted downwardly between the transverse frame members and the slabs, each holder overlapping three of the vertically associated slabs, and the wedge member 32a engaging the frame member' Accordingly, the holding member may be driven down to such an extent as may be neces sary to hold the slabs against the outer ends 'of the wall refractories.

To provide an outside finish sheathing or casing and an insulating dead air space, I employ a plurality of sheet or plate sections 3l. These are somewhat wider than the distance between the flanges Ilia of juxtaposed column members, and somewhat shorter than the vertical distance between the bolts i2. For mounting them in place, I placebolts 35 in the bolt holes IIb oi' the transverse frame members, securing them in place by nuts 36. The sheet sections 3l are iny serted between the`adjacent column members until their lateral marginal portions come to rest upon the anges Illa, their lower margins being` lar sheet clamps 39 are provided, same being shaped in conformity with the angular relationship of the ange and web of the column member,

and being apertured for accommodation of the bolt 40. One or more of the sheet clamps 3l are disposed at each lateral margin of a sheet section, 3l, the web of the columnmember being punched to accommodate the bolt 4|).

It will be appreciated that the flanges of structural steel members, such as I-beams, are,cus tomarilythinner at their margins than at the web, 'and consequently that their inner surfaces "are not at right angles to the web. The plateengaging faces of the batten clamps 33 andvsheet yclamps 39ste shaped to correspond to this bevel of the inner faces of the flanges ,|la. lAccordingly, when the nuts on the bolts l2 and Il are set up tightly against the clamps, the marginal portions of the sheet section will be pressed into tight engagement with the flanges lla. with the result that the sheet sections, and also the batwill be given a slight inward camber. Thus the margins of the sheet sections will be tightly tens 31 when the nuts are set up on the bolts 3l,

clamped against the column flanges I 0a and between batten strips and the flanges of the transverse frame members Il, with the result that the casing or sheathing will be very tightand prevent any substantial infiltration of air into the space between the sheathing and the insulating slabs. Thus this space may constitute a dead air space which will afford additional heat insulation for the refractory wall. If desired, instead of utilizing this space as a dead air space, it may be utilized for a controlled circulation of air.

From the foregoing it will be appreciated that the construction is one which provides very ef Aiective insulation for the refractory wall', but at the same time permits the structure to be assembled with facility and admits of parts being readily vremoved and replaced for purposes of inspection or incident toy replacement of refractories. The sheathing panels and the insulating slabs are of sizes which can be handled easily, and the manner'in which they are mounted and secured inplace permits their being'demounted and re-assembled intact.

What I claim is:

1. In a furnace wall, in combination, spaced upright members, transverse frame members supported laterally on said upright members, refractories supported by said transverse frame members to form a furnace chamber wall spaced laterally therefrom, removable heat insulating slabs applied to the outer surface ofl said refractories, and slab holders retained by said transverse frame members and holdingy the slabs against the refractories.

2. In a furnace wall, astructure as specified in claim 1 and wherein some of the insulating slabs are interposed between the refractories and the transverse frame members.

3. In a furnace wall, a structure as specified in claim 1 and wherein the insulating slabs are disposed one on top of another and respective slab holders have retentive engagement with a plurality of slabs.

4. In a furnace wall, in combination, spaced upright members, transverse frame members supported laterally on said upright members, brackets supported on said transverse frame members, refractories supported by said brackets to form a furnace chamber wall spaced laterally from the transverse frame members, demountable heat insulating slabs applied to the outer surfaces of said refractories, and slab holders retained by said transverse frame members and holding the slabs against the refractories.

5. In a furnace wall, a structure as specified in claim 4 and wherein the brackets have anchoringv engagement with some of the refractories to retain them against movement inwardly away from the transverse frame members.

6. In a furnace wall, a structure as specified in claim 4 and wherein the brackets have anchoring engagement with some of the refractories to retain them against movement inwardly away from the transverse frame members and the slab holders have wedging cooperation with the transverse frame members and slabs.

'7. In a furnace wall, a structure as specied in claim 4 and wherein some of the insulating slabs are' interposed between the refractories and the transverse frame members.

8. In a furnace wall, a structure as specified in claim 4 and-wherein the insulating slabs are arrangedend to end and side by side and respective slab holders have retentive engagement with a plurality of slabs.

9. In a furnace wall, a structure as specified in claim 1 and including also a sheet sheathing secured to the upright members in spaced relationship to the insulating slabs to afford an intervening air space.

10. In a furnace wall, a structure as specied in claim 1 and wherein sheet panels are retained by the upright members to form a. sheathing in spaced relation to the insulating slabs and fas tening means for said panels are secured to the transverse frame members. v

11. In a furnace wall, in combination, upright supporting members arranged in spaced rela.- tionship and having laterally extending anges at their inner sides, a refractory wall supported by said upright supporting members in inwardly spaced relationship thereto, sheet panels disposed one above another with their lateral margins overlapping the outer surfaces of laterally extending iianges of adjacent upright members,

. batten strip overlappingthe adjacent margins of vertically adjacent panels, and clamp members bolted to said laterally extending flanges and cooperating therewith to clamp the ends of the hatten strips and marginal portions of the panels between said flanges and said clamp members, said panels and batten strips forming a sheathing spaced outwardly from the refractory wall to afford an intervening air space.

12. In a furnace wall, a structureas specied in claim 1l and including transverse frame members connected to the flanges of the upright members and supporting sections of the refractory Wall, and fastening ymembers secured to said transverse frame members` at intervals lengthwise thereof and securing the hatten-strips thereto.

13. In a furnace wall, a structure as specified in claim 11 and wherein the outer surfaces of said laterally extending flanges are oblique to the plane of the wall and the clamping of the opposite margins of the panels against said flanges gives the panels an inwardly bowed form.

14. In a furnace wall, a structure as specified in claim 11 and wherein said upright members have webs extending outwardly from said laterally extending flanges, and sheet clamps are bolted to said webs between vertically adjacent clamp members andclamp lateral marginal portions of said panels against the outer surfaces of said anges.

15. In a furnace wall, in combination, a bracket having an upright body portion with a laterally projecting shelf, laterally projecting lugs on said body portion disposed at diierent distances above said shelf, the lower lug being oiset inwardly of the wall relative to the superjacent lug, and a refractory tile disposed in overlapping relationship to said shelf, said tile having, a slot accommodating said lugs, the lower lug engaging the inward wall of the s lot and the upper lug engaging the outward wall of the slot, whereby the tile is retained against tilting inwardly.

LOUIS H. HOSBEIN.