US1738707A - Furnace-wall construction - Google Patents

Description

Dec; 10,1929. l... H. HossEIN FURNACE WALL CONSTRUCTION Filed Oct. 1. 1924 Patented Dec. 10, 1929 UNITED STATES PATENT OFFICE LOUIS H. HOSIBEIN, OF WINNETKA, ILLINOIS, ASSIGNOR TO M. H. DETRIGK COMPANY OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS FURNACE-WALL CONSTRUCTION Application filed October 1, 1924. Serial No. 741,053.

This invention relates to the construction of heat resisting walls, particularly walls designed to sustain very high temperatures, such as may be encountered in various furnaces.

In many types of furnace construction the present tendency is toward the use of combustion chambers of greatly increased size,

which is a factor contributing to efliciency,

particularly in instances where provision is' In some of the more advanced designs of such structures, provision has been made for the support or suspension of the refractory wall in sections or units which are associated to form a tight closure, yet retain a certain freedom of relative mobility such as to accommodate expansion and contraction in the structure. In certain recent designs moreover, provision is made for the independent support of the component units or sections in such relationship that the refractories are relieved of the necessity of carrying excessive weight. Such construction has renderedfeasible the building of refractory walls of increased height and length, and the present improvements have been devised with the particular object of taking care of the increased lineal expansion in such structures, while maintaining the integrity of the refractory closure.

One of the particular objects attained by the present invention is the provision of construction whereby tight joints may be maintained at the corners or other junctions of the refractory walls, and wherein the tendency of meeting walls to cause distortion or disalignment incident .to expansion, is greatly decreased.

Another object is the provision of construction which will involve the use of minimum material and permit duplication of parts to a most extensive degree.

Another object is the provision of struc ture which is conveniently applicable in walls of the suspended type above mentioned.

Other and further objects of the invention will be pointed out hereinafter, indicated in the appended claims, or obvious to one skilled in the art upon an understanding of the present disclosure.

.For the purpose of this application I have elected to present herein certain embodiments of the invention, but it is to be understood that thy are offered for the purpose of illustration merely, and are not to be regarded as limiting the invention which I purport to secure, short of its true and most comprehensive scope in the art.

In the drawing forming part of this specification,

Fig. 1 is a detail in the nature of a sectional elevation taken longitudinally of a portion of a furnace wall, as on the section lines 1-1 of Fig. 3.

Fig. 2 is another detail in the nature of a sectional elevation transversely through a portion of the furnace wall, as taken on lines 2-2 of Figs. 1 and 3;

Fig. 3 is a cross section of a portion of a furnace wall on a line corresponding to line 33 of Fig. 1.

Fi 4 is an illustration in perspective, of one orm of cover brick retainer. Fig. 5 is. a fragmentary detail in the nature of a cross-section of a wall portion including' another form of cover brick retainer, and

Fig. 6 is a fragmentary sectional elevation of the same.

The present invention is in the nature of improvement in certain features of the furnace wall construction described and claimed in the co-pending applications of Raymond D. Foltz, Serial Nos. 684,698 and 711,557, the

general wall structure herein shown being of the type therein disclosed. Hence, it will be understood that in the accompanying drawing the members designated by the reference characters 10 are structural members forming supports for the furnace wall or portions in horizontally rumnng series with the series the respective refractories arranged one above another. The hangers have shelf portions 12 upon each of which is carried a stack or tier of refractories 14L in the form of slot-ted tile which are retainedin position on the hanger by engagement with the retaining flanges 12 of the latter. The

hangers have the horizontal flanges 12' which support partition brick 15 arranged to extend between the sheathing wall 11 and the outer ends of the refractories 14, to subdivide the intervening space into compartments, and also the outer flanges 12, spaced from the outer faces of the refractories 14. Throughout the greater portion of the length of the wall the hangers 12 are disposed so that juxtaposed tiers of tile are in lateral abutment, so as to form a tight wall, this being thecase also at the corners or wall intersections. At suitable intervals, however, a proper space is left between the refractories on adjacent hangers to accommodate the expansion of the portions or sections-of the wall as thus subdivided, said spaces beingvdesignated by the reference character S. Inasmuch as ordinarily there is a number of horizontal series of hangers, it will be understood that in such instances there will be a number of these expansion spaces distributed along the height as well as the length of the wall. Vertical expansion in the structure is accommodatedby horizontal expansion joints as explained in the applications mentioned above. Consequently, it will be observed, the wall may be regarded as built up of a plurality of sections which are separated by expansion spaces, with each section comprising a number of independently flexibly suspended units, with in each unit susceptible of a certain amount of movement relative to the others. Due to this mobility of the individual refractories and the respective units, expansion in the plane of the wall will be accommodated by the expansion spaces so readily as to relieve the refractories and the supporting members of destructive stresses. In conjunction with the features for holding the individual refractories and composite units in alignment, the opportunity for expansion thus afforded will be effective to maintain the structure against warping andbulging. The expansion spaces perform another important function in the structure in regularities in the size of the tile.

for ir- While maintained within certain tolerances, it will be understood that it is commerically impracticable to make all of the tile of exactly the same width. Consequently, after a number of that they accommodate or compensate tiers have been placed together with their sides in abutment, itmay be found that some of the tile in the last tier will project laterally beyond others. It will be understood, of course, that the fit of the tile on the hanger flanges 12 allows sufficient clearance for the tile to adjust themselves to this condition. However, with assembly of a great number of tiers, the aggregate of these discrepancies in nary conditions this would result in a leaky wall. I prevent such a contingency by the provision of external closures for the expansion-joints. I These closures are formed by the cover bricks 16 which may be refractories of the kind ordinarily known as split brick, and they are stood end on end against the outer surfaces of the refractories 14 and covering the expansion space. They are held in place by suitable retaining members, designated 17 in Figs. 1, 2 and 3 and 17' in Figs. 5 and 6. One of the retaining members is illustrated in Fig. 4, wherein it will be seen that it is provided with lateral wings 17 a conjoined by an offset body strip 17 the recess formed the latter being subdivided vertically by the flange 17 The flange 17 .is interposed between the ends of the cover bricks so that the portion 17 b overlaps their outer sides, and the end portions 17" are interposed between the outer ends of the refractories 14 and the outer flanges 12 of the hangers. By this assembly the cover bricks are held in contact with the wall refractories so as to form a tight closure for the expansion spaces. Ordinarily the lowermost cover brick rests upon the partition bricks 15. In the absence of the partition bricks, however, the cover brick may be maintained by the hangers of the subjacent series. The retaining members 17 are held by their flanges 17 0 against sliding downward, and their movement laterally is limited by the webs of the hangers 1 2, so that they prevent displacement of the bricks 16 from over the expansion spaces.

' In the form illustrated in Figs. 5 and 6,

the retaining members 17 are straight and also limits lateral movement by contacting the hangers.

By virtue of the constructions described, the flexibility of the wall is increased and accommodation for expansion is afforded in such fashion that allowance does not have to be made at the ends of the wall for the cumulative expansion of the material in its entire length. Consequently there is not the oppor tunity for adjoining walls to force one another out of alignment and the corners may be kept tight without the use of packing. The expansion joint closures accommodate the movement ofthe Wall refractories and, unlike packing in vertical joints, are not displaced by enlargement or-contraction of the expansion spaces. The closure is permanent and is easily assembled and does not interfere in any fashion with the assembly of the wall structure as a whole or with its dismantling in part for the purpose of repair.

What I claim is:

1. In furnace wall construction, the combination with movably supported wall sec tions arranged with expansion spaces between certain sections, of refractory closures supported free of the sections and externally contacting the wall and closing the expans1on spaces.

2. In furnace wall structure, refractories movably supported to form wall sections with expansion spaces therebetween, and

' closures spanning the expansion spaces.at

the outer side of the wall and supported in sliding contactwith external surfaces ofthe' refractories on opposite sides of the expansion spaces.

3. In furnace construction, in combination, wall hangers, refractories sup orted thereon to constitute wall sections, sald sections arranged with intervening expansion spaces, and closures sustained by the hangers at the outer side of the wall in covering relationship to the expansion spaces.

4. In furnace construction, refractories arranged in juxtaposed tiers with expansion spaces therebetween, closure members covering the expansion spaces at the outer sides of the refractories, and hangers'maintaming the refractories and closure members in contact.

5. In furnace construction, the combination of refractories arranged in juxtaposed courses with intervening expansion spaces, cover brick closing said expansion spaces at the outer side of the refractories, and retaining members holding the refractories and cover brick in assembly.

6. In furnace construction, the combinetion of refractories arranged in courses with lntervemng expanslon spaces, cover brick 7. In furnace construction, refractories supported in relatively movable groups to form wall portions meeting at'a corner, certain of the groups being spaced apart to provide expansion spaces, and closures supported in sliding contact with the refractories and covering the expansion spaces externally.

8. In furnace wall construction, in combination, refractories supported in juxtaposed tiers, cover brick arranged against the outer faces of the refractories in overlapping relationship to those in separate tiers, and retainin means holding the refractories against inward displacement and the cover brick in contact with them.

9. In furnace wall construction, combination of refractories arranged in juxtaposed tlers with intervening expansion spaces, means holding the refractories in approximate alignment, cover brick closing the expanslon spaces, and retaining members engaged with said means for holding the cover brick against the refractories.

10. In furnace wall construction, in com:- bination, shiftable tile retainin members, refractories retained thereby to orm wall sections with intervening expansion space, an external closure for the expansion space, and retaining means retained by the tile retaining members for; holding the closure in position.

11. In furnace wall structure, in combination, rigid members, refractories movably retained thereon to form wall sections, cover brick overlapping the outer faces of refractories in dlflerent sections and retaining hold the cover bricks in position, said cover bricks and refractories being relatively movable to limited degree.

12. In furnace wall structure, combination of rigid members, refractories movably supported thereon to form vertical wall sections with intervening expansion space, and cover brick maintained by the rigid members in position to close to cover the outer opening of the expansion space, said brickand refractories being relatively movable in vertical planes.

13. In furnace wall structure, in combination, parallel hangers, refractories retained thereby to form wall sections, cover brick covering the joint between said wall. sections, and retaming members enga ed with the hangers for holding the cover rick against the refractories.

In testimony whereof I have hereuntQsiibscribed my name. i

covering the expansion spaces, and retaining;

members holding the refractories in approximate alignment and the cover brick in contact with their outer faces.

CERTIFICATE OF CORRECTION.

Patent No. 1,738,707: Granted December 10', 1929, to.

LOUIS H. HOSBEIN.

It is hereby certified that error appears in theprinted specification of the above numbered patent requiring correction as follows: Page 3, line 111, claim l2, strike out the words .to close"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of January, A. D. 1930.

M. J. Moore;

(Seal) Acting Commissioner of Patents. 7

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