US2011701A - Furnace construction - Google Patents

Description

J. E. ANDERSON FURNACE CONSTRUCTION Filed Feb. 5, 1952 2 Sheets-Sheet 1 1935. J; E. ANDERsbN 2,011,701

FURNACE CONSTRUCTION Filed Feb. 5, 1952 I 2 Sheets-Sheet 2 Patented Au 20, 1935 innn vz on CONSTRUCTION:

JohnfE. Anderson, Chicago, 1111., assignor to Plibrico JointlessFirebrick Company, Chicago,

111., a corporation-of Illinois Application February 5, 1932, Serial No. 591,245

s Claims. (Cl. 1 -99) This invention" rel-ates to furnace construction,

more particularly to arch construction and to.

anchors for supporting such arches. It is old in the art to construct arches for furnaces and the like from fire brick Whichare shaped to engage a rigid supporting structure located above the arch and outside of the fire zone of the furnace; Arches constructed in this'm'annerf are polyli'thic.- It is also old to construct such arches from a plastic material into which metallic supporting'devices are embedded to aid in'supporting the arch. This plastic' material is fused by the he'at of the furnace to form a monolithic arch. My present invention refers 7 more-particularly to amonolithic arch of this securely supported but at the same time the sup- 111 the preferred embodiment of my invention the plastic material is-supported by a plurality of spaced refractory anchorswhi'ch are embedded in the arch structure. These anchors pro- .ject above the upper surface of the arch, that is porting device is capable of movement to compensate for expansion and contraction of the arch under heating and cooling of the furnace.

The refractory anchors embedded in the mass of plastic material forming the arch are composed of the same material as the arch itself and under the heat of the furnace the anchors and arch may be fused together to form a monolithic structure. Since the material in the arch and anchors is the same, the expansion of the arch is uniform throughout and there is no tendency for the expansion and contraction of it to aid the formation of cracks. The metal is all outside the arch and its expansion will not disrupt the arch.

My invention will be best understood by reference to the accompanying drawings in which a preferred embodiment of it is shown by way of example and in which:

Fig. 1 is a perspective view of the anchor of my invention in its preferred form; 1

Fig. 2 is an isometric view of an arch built in accordance with the teachings of my invention; and

. Fig. 3 is a cross sectional view through a furnace showing the adaptation of my approved arch thereto.

Referring to the drawings now in more detall, the anchor It preferably comprises a generally pyramidal body having a substantially rec'- tangular apex H which is pierced by a transversely disposed hole 92. The anchor is formed of a plastic material and is burned to refrac tory hardness. The shape shown is by way of example only and may bevaried. The dimen sions of the anchor will of course depend upon the thickness and weight of the arch that it is designed to support. 1

In the arch shown in Fig. 2 the anchors l0 are supported upon rods or pipes l5 extending through the openings 42 in the apex portion of the anchors. Theserods rest upon the flanges l6 and ll of rigid I-beamsupports l8 and I9, re spectively. The ends of the rods i5 are not rigidly attached to the supports it and I9 but rather are permitted of limited movement with respect thereto to allow for expansion and contraction of the arch.

The archZQ' is composed of a plastic material set between the spaced anchors 10. form, not shown, is employed to support the plastic material during the setting of the arch. Preferably the material from which the arch 20 is formed is the same as that employed in the manufacture of the anchors l0. After the arch has set the supporting form is removed and the arch is subjected to a high temperature which bakes out the material 20 and may fuse it with the anchors ID to form a monolithic arch. During the heating of the arch anchors it! may move upon the supporting rod 55 and the rod I5 may move upon the supporting members I8 and H) to compensate for expansion of the arch.

In Fig. 3 I have shown the arch applied to a boiler setting. In this figure anchors [0 are supported upon supporting rods l5 which engage flanged supporting members 25. These members are themselves supported from the structural frame members 26 and 2'! of the boiler setting by suitable brackets 28 and 29, respectively, pivotally connected at their lower ends to members 25, on horizontal axes, as shown in Figure 3. Each of the members 26 and 21 conveniently comprises a pair of parallel I-beams between which the upper end ofthe bracket passes, each bracket having at its upper end an enlarged head which seats loosely upon the lower flanges of the I-beams, as in Figure 3. As the arch 30 expands anchors IE3 may move upon the supporting rods I 5 and those rods may move upon the supporting member 25, as before. Supporting member 25 is itself capable of limited movement with respect to the structural supports A suitable 26 and 2iv of the b oiler setting because of the pivotal-connections between supports25 and said forthe combustion chamber 32.

by refractory anchors' H! which are carried by rods l5. These rods are suitably supported; for

, example, by bracket 33, which is preferably a:

casting. The bracket 33is' in turn supported by" channels 34 which form a part of the face 35 f. the boiler setting. The-brackets 33. are attached to the channels in anypreferredmanner such as byrivets 36.

When the furnace is fired theheat in thecombustion chamber may fuse the plastic material of the arch 38 with the anchors I ll toform a monolithic structure, but ordinarily the temperature in the; furnace will not be high enough to fuse thematerialQ Inall instances thetemperatur'es encountered will be sufficient to thoroughlybake out and harden the plastic'material,,When so hardenedthe plastic material will form a tight 1 joint with the anchorsandthe infiltrationof air Y willbeprevented. "Having thus described my invention, -what I consider new and desire to have protected by Letters Patent is'pointed out'lin the appended claims. 1 1 f What is claimed is;

1; In combinationina'furnace arch construc t ion a refractory mass,, a pluralityj of anchors secured to and projecting above the-masmsupporting members above the mass, and cylindrical supportingrods passed looselythrough'the upper ends ofthe respectiveanchors, theend's of; the

rods resting freely; upon the supporting members I i g tially parallel to the mass and constituting rollers acc'ommodating relative movement of the anchors in either direction transversely 'of the respective rods and substan- 2. in combination in a furnace setting and an supporting members. p

4. In combination, a plurality of supporting arch construction therefor, frame members, supporting -members, -means 'pivotally and'loosely suspending the supporting members from the frame members for movement relative thereto, a refractory mass constituting the roof of the arch, a plurality of anchors secured to and projecting above the mass, and suspending rods passed through the upper ends of the anchors and resting freely upon said supporting members.

'3. In combination, a plurality of supporting :njembers disposed in substantially, parallel and I spaced relation, each of said members comprising a base flange and an upwardly extending web, a

a mass of refractory below the supporting 'm'embers,

anchors securedto and projecting above the mass and between said members, and rods passed through the anchors and resting freely upon and otherwise free from the flanges of the supporting members, the rods being confined against objec tionable'endwise movement by the Webs of said members disposed in substantially parallel and spaced relation, each of said members comprising a base flange andan upwardly extending web, a

mass of refractory below the supporting members, anchors secured to and projecting above the mass and between said members, and cylindrical rods passed loosely through theanchors and resting freely upon the fiangeof the supporting members.

5. In combination; a plurality 'of supporting members disposed in substantially parallel and spaced relation, a mass of refractory, anchors secured to and projecting above said mass and between said members, androdspassed through the anchors and resting freely upon the supporting members and otherwise free therefrom for relative movement lengthwise thereof, said supporting members being provided with upwardly extending elements disposed to:confine said rods against objectionable endwise movement.

I P JOHNELANDERSON.

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