US2349700A

US2349700A - Furnace wall construction

Info

Publication number: US2349700A
Application number: US418868A
Authority: US
Inventors: William H Boyd
Original assignee: General Refractories Co
Current assignee: General Refractories Co
Priority date: 1941-11-13
Filing date: 1941-11-13
Publication date: 1944-05-23
Anticipated expiration: 1961-05-23

Description

May 23, 1944.

w. H. BOYD FURNACE WALL CONSTRUCTION Filed Nov. 13, 1941 2 Sheets-Sheet 1 May 23, 1944 w. H. BOYD FURNACE WALL CCNSTRUCTION Filed Nov. 15, 1941 vi?, Sheets-Sheet 2 WTA/5% Patented May 23, 1944 FURNACE WALL CONSTRUCTION William H. Boyd, Drexel Hill, Pa., assigner to General Refractores Company, Philadelphia, Pa., a corporation of Pennsylvania Application November 13, 1941, Serial No. 418,868

(Cl. l2-101) `6 Claims.

The object of the invention broadly is to provide improvements in furnace construction, and more especially in the structure and support of what is generally known as a unit supported furnace wall.

Another object is to provide in such a wall the combination of vertically spaced angle members, a novel form of detachable hanger adjustably carried by one of said members and comprising an upwardly extending lug and an outwardly and diagonally upwardly extending terminal portion, courses of insulating fire brick having recesses into which the terminal portions of said hangers extend, and provided with sloping upper wall surfaces which rest upon said terminal portions, and blocks or slabs of heatinsulating material, which at their lower limits rest upon the hangers and are xedly bound at their lower limits between the said brick and said lug, while at their upper limits said block or slabs are bound between said wall and the vertical outer surface of a second or upper angle member.

A further object is to provide for such a construction an improved metal hanger, which basically comprises a transversely sloping, 1ongitudinally extending rail, one or more integral arms extending initially in the plane of said rail and thence horizontally, each such arm being provided with an upwardly extending lug, and upon its free end terminating in a downwardly and reversely directed hook portion, adapted to engage the under surface of a horizontal flange forming a part of a structural angle member, said hanger arm or arms being preferably though not necessarily provided with depending lugs, which normally rest directly upon the upper surface of the angle flange engaged by said hook portion.

Still another object is to provide the combination of a metal framework, comprising vertically spaced, horizontally extending angle members, in combination with hangers detachably carried by said members, a unit supported wall of insulating fire brick supported by the free outer portions of said hangers, blocks or slabs of lightweightheat-insulating material of even very much lower thermal conductivity than said fire brick also supported by said hangers between said wall and said angle members. and if desired a protective element in sheet form covering the exposed surface of said insulating material.

And a still further object is to provide the combination of a supporting member, a hanger carried thereby having an outwardly and downwardly sloping upper surface, a re brick having a recess provided with a. surface resting upon the sloping surface of said hanger, and blocks or slabs of heat-insulating material bound in position by and operating to prevent angular or lateral shifting of said brick or said material, as said brick is free to gravitate upon said hanger and press said insulating material againstl said supporting member.

In the following description reference will be made to the accompanying drawings forming part hereof and in which,

Figure 1 is an elevational view from the outside of the furnace of a wall construction embodying features of the invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a sectional view taken on the line 3 3 of Figure 1.

Figure 4 is a perspective view illustrating features of the present invention and drawn to an enlarged scale.

Figure 5 is an enlarged view of features shown in Figure 2; and

Figure 6 is a view similar to Figure 5 illustrating a modication.

Referring to the drawings, the service lining is of insulating fire brick I and 2, which may be described as a ceramic material having low thermal conductivity and low thermal capacity in combination with heat insulating blocks or slabs 3 which comprise a material of very much lower thermal conductivity than said fire brick, examples of such insulating material being known as mineral wool, magnesia block, and other types known as back-up insulation.

The insulating fire brick l are disposed with their faces ush and are known as supported wall brick, while one or more ller courses of brick 2 of the same material, are laid flat-wise with their faces iiush with each other and with the faces of the first-mentioned brick upon which they are laid. A row of directly supported brick and the superimposed course or courses of ller brick are designated a unit or belt, while several such units vertically arranged comprise a fire Wall. Some clearance space is provided between the units or belts to accommodate expension and contraction and is indicated at a in Fig. 2 of the drawings. 'I'he composite wall is backed up by blocks or slabs 3 of insulating material, which may be coated upon their outer and exposed surfaces with a finishing cement,

weather proofing material. or the like, or the blocks may be protected by sheets of steel plate, asbestos lumber or like material indicated at c, in Fig. 5, and which merely afford protection and in no way contribute to the support of the bricks or other part of the structure.

Around the outside of the furnace are disposed in spaced relation columns 4 which may be either angle irons, I-beams, channels, or other form of steel members. On the inside face of these columns there is suitably secured a series of horizontally disposed channel or angle members 5. For this purpose spacers or spacer castings 6 are interposed between the inner faces of the columns and the webs of the angle members 5, and these are secured in place by bolts 1. The purpose of spacers 6 is to ailord clearance between the horizontal flange or flanges 8 of the respective angle member and the adjacent face of the column for a purpose to be presently described.

The so-called hangers or brick-supporting members comprise transversely inclined rails I0, having spaced, laterally extending, integral arms II, which merge into normally horizontally eX- tending sections. provided upon their opposite ends with depending, reversely curved` hook portions I2, which engage the under surface of the upper ilange of the angle member 5. The arms I-I are also provided, midway of their lengths. with upwardly and downwardly extending lugs I3 and I4. 'I'he downwardly extending lugs Id rest upon the top of the upper flange of the angle members 5, and the purpose of the lugs I3 will be hereinafter described. The inclined rail I0 extends into inclined notches I5 provided in the insulating bricks i and in that way said rows of bricks I are supported and by gravity tend to settle towards the adjacent vertical surface of the said angle member 5. The inclination of the inclined rails lil and of the notches I5, may be twenty-two degrees from the horizontal, more or less, It may be remarked that the supported bricks are slidable sidewise in respect to the rails Il), and the hangers as a whole are slidable longitudinally as weil as detachable. in respect to the channel members 5, which facilitates their proper positioning during erection and repair. The blocks 3 rest upon the horizontal portions of the hanger arms Il, and at their lower limits are positioned between the supported brick wall on one side and on the other side by the lugs I3 of a hanger carried by a lower angle member. while the upper limits of said blocks are positioned between said wall and the vertical surface of a second and higher angle member.

rl'he construction of the modification illustrated in Figure 6 is as above described except that the member 5a is shown as of an angle section instead of a channel section.

In both forms of the device. shown in Figs. 5 and 6. it will be noted that when the horizontal thickness of the blocks or slabs 3 is substantially uniform at their marginal portions. the distance from the inner surface of the hooked portion I2 of the hanger to the opposite f ace of the upper lug I3, should be substantially equal to that of the transverse Width of tbe supporting flange of the angle or channel to which the hanger is attached. Otherwise. the brick I in gravitating upon the rail I 0 will bind more firmly one of the adjacent slabs 3, while holding the other slab relatively loosely in place.

Having thus described my invention, what l claim and desire to protect by Letters Patent of the United States is:

l. A furnace wall, comprising a horizontally extending angle member, a hanger comprising a rail having a transversely sloping upper surface and a plurality of spaced arms, each of which has a substantially horizontal intermediate portion and a hooked terminal portion engaging a flange of said angle member, insulating re brick provided with a recess of greater depth than the width of said rail and a slanting upper surface resting upon said rail, and blocks or slabs, of heat-insulating material of low thermal conductivity adapted to rest upon and be bound between said lbrick and said angle member by the weight of said brick sliding freely and adjustably upon said slanting surface.

2. A furnace wall, comprising a horizontally extending angle member, a hanger comprising a rail having a transversely sloping upper surface and an arm having a substantially horizontal intermediate portion and a hooked portion normally engaging a flange of said angle member, an insulating nre brick provided with a recess of greater depth than the width of said rail and a slanting upper surface resting upon said rail, said hanger arm having an upwardly extending lug, a block or slab of heat-insulating material of low thermal conductivity resting upon the horizontal portion of said hanger arm, and bound at its lower limit between said brick and said lug, and a second block or slab bound at its upper portion between said -brick and said angle member.

3. In a furnace wall, the combination of an angle member and insulating brick provided with a recess having an inwardly and upwardly sloping upper wall, with a hanger comprising a rail portion having a sloping surface in engagement with said recess wall, said rail portion having an arm comprising intermediate and hooked terminal portions, said hooked portion normally engaging the under side of a flange of said angle member, while said intermediate portion engages the upper surface of said flange, the intermediate portion of said arm being provided with a lug. and a block or slab of heat-insulating material of low thermal conductivity supported by said intermediate portion and bound between said brick and said lug, as said brick gravitates upon said sloping rail surface towards said angle member.

4. In a furnace wall, the combination of an angle member and insulating brick provided with a recess having 'an inwardly and upwardly sloping upper wall, with a hanger comprising a rail portion having a sloping surface in engagement with said recess wall, said rail portion having an arm comprising intermediate and hooked terminal portions, said intermediate portion being provided with a depending lug, said hooked portion normally engaging the under side of a flange of said member, while said intermediate portion indirectly rests upon the upper surface of said flange through the medium of said depending lug, said intermediate portion also being provided with a second lug, and a block or slab of heat-insulating material of low thermal conductivity supported by said intermediate portion and bound between said brick and said lastmentioned lug, as said brick gravitates upon said sloping rail surface towards said angle member.

5. A furnace wall, comprising a supporting member, a hanger carried thereby having an outwardly and downwardly sloping upper surface, a tire brick having a recess provided with a surface of greater transverse extent than and resting upon the sloping surface of said hanger, and blocks or slabs of heat-insulating material bound in position by and operating to prevent angular or transverse shifting of said brick, as said brick is free to gravitate upon said hanger and press said insulating material against said supporting member.

6. In a furnace wall, the combination of an angle member, with insulating brick provided with a recess having an inwardly and upwardly sloping upper wall, a hanger comprising a rail 5 of said angle memberI an upwardly extending lug carried by said hanger, the distance between the inner surface of said hooked portion and the opposite face of said lug being substantially equal to the transverse width of said flange, and in- 10 sulating slabs bound by and between said brick and lug and between said brick and said angle, as said brick gravitates freely upon said sloping rail surface.

WILLIAM H. BOYD.