US2387663A - Furnace arch or roof construction - Google Patents

Description

Oct. 23, 1945. H. HOSBEYIN ET AL 2,387,663

FURNACE ARCH OR ROOF CONSTRUCTION Original Filed Sept. 16, 1942 3 Sheets-Sheet 2 INVENTORS. IOMLS HHosbeuz Oct. '23, 1945 1.. H. HOSBEIN ET AL 2,387,563

' FURNACE ARCH OR ROOF CONSTRUCTION V Original Filed Sept. 16/1942 3 Sheets-Sheet z IN VENT ORS.

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, to decrease the quantity of metal required in the Patented Oct. 23, 1945 FURNACE ARCH OR ROOF CONSTRUCTION Louis H. Hosbein, Glencoe, Ill., and Louis Ellman, Pittsburgh, Pa., assignors to M. H. Detrick Company, Chicago, Ill., a corporation of Delaware Original application September 16, 1942, Serial Divided and this application August 9, 1943, Serial No. 498,018. In Great Britain November 28, 1942 i 11 Claims. (Cl. 110-99) This invention relates in general to furnace arch or roof constructions, and especially to refractory hanger blocks or tiles for furnace con- The invention relates particularly to furnace arch or roof constructions in which the refractory members or tile exposed to the high furnace temperatures are supported from refractory hanger members which, in turn, are supported by or suspended from the main metal support- I ing structure- Thus, in the construction of the present invention the metal members are positioned more remote from the high temperature of the furnace than in constructions in which i the main refractory members or tile are supported directly by metal members. As the refractory hanger members are able to withstand higher temperatures than the metal members previously used for this purpose, the construction of the present invention enables furnaces to be operated at higher temperatures than heretofore, or if operated at the usual temperatures, the construction of the present invention enables the furnaces to be operated for much longer periods without requiring repair and replacement. I I

Therefore, a principal object of the invention is the provision of relatively narrow, small refractory members or tile sections as hangers between the main refractory members or tile exposed to the high temperature of the furnace and the metal supporting structure, for the purpose of increasing the normal period of operas tion of the furnace and/or increasing the maximum temperature permissible in the f mace without adversely affecting the more remotely located metal supporting structure.

A further important object of the invention is supporting structure of the furnace wall of a high temperature furnace.

A further object is to reduce the cost of the furnace arch or roof construction by replacing the previously used metal supporting structure/ in part by less bers or tile. I

Another object of the invention is the provision of relatively narrow small refractory hanger costly refractory hanger mem members which can be easily installed and can L be easilyreplaced individually without disturbing any substantial portion of the furnace wall or the metal supporting structure. Another object-of the invention "is the provision eye/suspension arch or roof for high tem- 5 perature furnaces which has transfer characteristics.

A further more specific object of the invention is the provision of a furnace arch or roof construction permitting relatively complete insulation and also permitting effective control of the degree or thickness of insulation employed.

A further object of the invention is the provision of a suspension arch or roof which is easy to install and easy to repair with a minimum of f labor. I I 1 Other objects and advantages of the iriventioh will be apparent from the following detailed description, taken in conjunction with the accompanying drawings, which disclose a preferred embodiment of the-invention.

In the accompanying drawings:

Figure 1 is a vertical section showing the improved furnace arch or roof construction of the present invention.

Figure 2 is a horizontal section line 2-2 of Figure 1. I V

Figure 3 is a horizontal section line 3-3 of Figure 4. M

Figure 4 is a transverse vertical-section ofwthe improved furnace arch or roof construction of the present invention.

Figure 5 is a perspective view of the ref ractorylhanger member or tile of the present invention.

Figure 6 is a side view of the refractoryhanger) member.

Figure 7 is a end view of the refractory hanger et remely low heat v taken along taken along member.

Figure 8 is a horizontal section taken along I line 8-8 of Figure 7. p

Referirng to Figures 1 to 4 inclusive, the embodiment of the invention disclosed therein is l in respect of a furnace arch which is suspended from a series of I beams III which may rest upon the brick work forming the sides of the furnace, or may be supported in any other desired manner. Pairs of clip members,,or clamps H are provided for supporting cross beams II from the I beams ill at predetermined desired locations. Each clip II has an upper projecting edge 34 adapted to be positioned in engagement with the lower flange of the I;bam l0. Each clip H Q has lower inturned flanges l3 adapted to contact the upper flange of a cross beam l4. Each clip also has projections or lugs I2 at the lower outer portion thereof adapted to fit,into holes drilled in the cros beam I 4. I

With the use of the clip ll of the present inyerition, the size/oi the ,fiange of the I beam!!! and the. spacing'between I be In is relatively immaterial, since the holes in' the beam 14, adapted to receive the projections or lugs l2 on the clip II, can be drilled on the job to suit the particular size of the lower flange of the I beam I and the spacing thereof. This, of course, greatly simplifies the work involved in supporting the cross beams l4 from the main I beams I0 and also makes it unnecessary to have different sizes of clip castings for relatively moderate variations in the sizes of I beams In employed. It will be understood of course that when members or tile 2| from the cross beams l4. Each metal hanger member l6 has upper inturned flanges l1 adapted to seat upon the lower flange of the cross beam I4. One of the pairs of flanges H on each metal hanger member I6 has a stepped construction 20 to enable the hanger member to be easily applied over the lower flange of the beam ll by tilting the member |6 relative to the flange of the cross beam so that first one flange l1 and then the opposite flange will be moved past the lower flange of the cross beam M. The member I6 is then moved to its operative vertical position and both flanges are brought into seating engagement with the lower flange of the cross beam ll. Each metal hanger member It has a metal wall intermediate the two ends thereof for connecting the two sides of the metal hanger member. The lower edges of the side walls of the metal hanger member have inturned flanges l8 which are adapted to cooperate with grooves in the-refractory hanger member or tile 2| for supporting the tile from the metal hanger member.

Each refractory hanger member or tile'2l comprises a block having grooves 22 and 23 extending along the side walls thereof adjacent the upper edge of the tile 2|. The lower inturned flanges l8 of the metal hanger member l6 are adapted to be received in either groove 22 or 23 to support the tile therefrom. In Figure 4 of the drawings the metal hanger member I is shown supporting the tile 2| by means of the inturned flanges l8 cooperating with the grooves 22 on the two side faces of the tile 2|.

The lower portion of the tile 2| has recesses 24 in both side faces thereof for the purpose of supporting the main refractory members or tile 26 therefrom. Each main refractory member or tile 26 has grooves 28 along the side faces thereof with overlapping flanges 30 and 3| which are adapted to cooperate with the recesses 24 in the tile 2| and thus suspend the main tile members 26 from the hanger tile members 2|.

The lower faces 21 of the main refractory members or tile 26 are exposed to the high temperatures within the furnace. I

Insulation 29 is provided over the top .surfaces of the main refractory members or tile'26, and

inasmuch a the hanger tiles 2| are relatively narrow and small the insulation 29 covers substantially the entire upper surfaces of the main refractory members or tile 26.

The mainrefr'actory members or tile 26 are provided with a series of groove and tongue means 32, 33 (Figures 9 to 11) around the four sides thereof, arrangedto cooperate with corresponding groove and tongue means on adjacent main tile members. for heat sealing urp ses.

Also the adjacent rows of main tile members 26 suspended from the same hanger tile 2| are staggered with respect to each other, as shown in Figure 2, to further provide heat sealing means.

As hown in Figures 5 to 8 inclusive, the hanger.

tile 2| has four recesses 24 of equal size, two on each side wall thereof, and accordingly four main refractory members 26 are adapted to be suspended from a single hanger tile 2|. The tile 2| shown in Figures 5 to 8 inclusive is of comparatively small dimensions, in the preferred construction the dimensions being 7% inches high, 5% inches wide and 2;; inches thick. Also the grooved or recessed portions, that is, the grooves 22 and 23 and the recesses 24, are of a rather simple nature, each opening into the ends of the block. so that these can b easily formed on the hanger tile 2| with the minimum of expense. As a result, the relatively narrow and small hanger tile 2| of the present invention is very inexpensive, costing only a few cents, and is adapted to take the place of a substantial portion of the metal supporting structure (involving the use of chrome alloy castings) of the usual furnace arch construction costing much more than the tile construction of the present invention.

As will be seen from Figures 5 to 8 inclusive, the recesses 24 in the lower portion of the hanger tile 2| correspond in size on both sides of the tile so that the tile can be reversed and will be equally operative in either position. The groove 23in both sides of the tile 2| is shorter than the groove 22. The inner end of the longer groove 22 is positioned so that when the metal hanger member I6 is placed with the lower inturned flanges H! in the groove 22 and abutting the inner end of this groove, the tile 2| will be centrally suspended from the metal hanger member I6, as shown in Figure 4. The length of the shorter groove 23 is approximately one-half the width of a metal hanger member l6 so that, if desired, instead of supporting the tile from a centrally positioned metal member l6 in the groove 22, the tile could be supported by a pair of metal hanger members |6 at each end thereof, in the grooves 22 and 23. e

With the inturned flanges I8 in the groove 23, the hanger member "5 would extend only half way into this groove and the remainder of the metal hanger member l6 would be available for supporting the hanger tile next adjacent. In this way each metal hanger member I6 is adapted to cooperate with the grooves 22, 23 of a pair of er tile 2| are such that the tile is relatively narrow and small. This is important for the reason that when the insulation 29 is applied to the upper surface of the main tile members 26, such intively inexpensive tile hanger members, and prosulation covers practically the entire upper survides a furnace arch construction which is capaface of the main tile members 26 except for the bio of operating under more intense heat condi- U space occupied by the relatively narrow hanger tions for longer periods of time, while at the same 1 tile members 2|. Accordingly, the insulation ap- 5 time greatly simplifying replacement and repair plied to the construction of the furnace arch of as and when this may become necessary.

the present invention is much more effective in It will, of course, be evident to those skilled in preventing heat losses, thandnprior constructhis art that the hanger refractories or tile of tions in which relatively large blocks have been, the present invention can also be used in the employed without the use of any insulation, or same manner, as retainer refractories or tile, for so arranged that insulation, if employed, would retaining the side walls of a furnace in alignbe relatively ineffective. Moreover the present ment.

construction enables the thickness of the insula- 7 It will be apparent that various changes may tion 29 to be varied'to a considerable extent be be made in the form, construction and arrangefore the insulation approaches the lower flanges ment of the parts of this invention without dell of the metal hanger members I6. Accordingparting from the scope of the invention as here 1y, all of the metal supporting structure can be in described and without sacrificing y of its well insulated from the high temperatures withimportant advantage the form f h i v n in the furnace, and the thickness of the insulahereinbefore described being merely a preferred tion can be accurately determined, depending embodiment thereof.

upon the temperatures at which the furnace is to This application is dlvision of our oopendlng be operated. application Serial No. 458,592, filed September Attention is also directed to the fact that the 1942- use of hanger tile members 2| of the present We claim:

invention greatly increases the normal life of l. A hanger tile memberfor furnace constructhe furnace. Thus, even if the lower portion tion, comprising a refractory block having oppoof the inain tile members 26 is burned away dursitely disposed end faces, oppositely disposed side ing the operation of the furnace, the tile hanger faces, and oppositely disposed top and bottom members 2| are equally able to withstand the faces, a pair of rooves in e of d s e faces high temperatures within the furnace, and ac- 30 adjacent the upper portion of said block, the cordingly the furnace is able to continue in opergrooves of each pair lying in the same horizontal ation for some time thereafter. In prior conplane. and the block having a solid portion sepastructions in which metal hanger members were rating the adj ends of Said grooves. and employed for the purpose of supporting the main recesses in said side faces adjacent the lower portile members 26 directly therefrom, as soon as tion of said block, said rooves and recesses the main tile members 26 were in part burned municating respectively with said end faces.

away so that the higher temperatures would 2. A hanger tile member for furnace construcbe directly effective in weakening the metal memtion, comprising a refractory block having oppobers, the furnace wall had to be repaired immesitely disposed end faces, oppositely disposed side diately. In the present construction all of the faces and oppositely disposed top and bottom metal supporting structure is much farther refaces, a pair of grooves in each of the side faces moved from and remote to the high temperatures adjacent the upper portion of said block, the within the furnace and the tile hanger memooves of each pair lyin in th s m horizontal bers 2| are able to withstand the same high tem plane, one of said pair of grooves on each side peratures as the main tile members 26. Thus, the face being longer than the other groove on each tile hanger members are able to withstand temof said side faces, and recesses in said side faces peratures of approximately 2200" F. to 2500 F. adjacent the lower portion of said block, said whereas it is considered relatively unsafe to exgrooves and recesses com u c ti respectively pose the metal hanger structure to temperatures with said end faces. exceeding approximately 1500 F. It will there- A h r t l m m r f rnace on tr fore be appreciated that with the present contion, comprising a refractory block having oppostruction the furnace can be operated at much sitely disposed e faces, opp y disposed Side higher temperatures than heretofore, or, if the faces and oppositely'disposed top and bottom furnace is operated at lower temperatures, the f a p r f rooves in e ch of th side faces construction will deteriorate less rapidly than the thereof adj the upp portion d b oc prior constructions, and accordingly can remain the grooves of each pair lying in the same horiin operation for much longer periods. zontal plane, and a pair of recesses on each side In connection with the repair of the furnace, face of the block adjacent the lower portion it will be apparent that the tile hanger memthereof, all of said recesses being of equ Size,

bers 2| can be easily removed and replaced withthe block having a solid portion between the adout disturbing any substantial portion of the iacent ends of each pair of rece the recesses furnace arch or any substantial portion of the and gr v s ommuni atin p t y with metal supporting structure. In many prior consaid end faces.

structions where it becomes necessary to replace A refractory member for ce Co struchanger members, a considerable portion of the tion, comprising a refractory lock hav pp metal supporting structure must be removed to Sl y disposed end faces, oppositely disposed side permit such replacement. In the present case aces, a ppos y sp top and bottom either tile members 2| and/or tile members 26 faces. a p of grooves in each of the side faces can be simply, quickly and easily replaced with adjacent the upp r p n of Sai block. t e minimum of labor and expense and without. disoo es of ea p lying in the me o ontal turbing any substantial portion of the metal supplane, one of said pair of grooves on each side ortin tru t r face being longer than the other groove on each We have therefore provided an improved furof said side faces, said groovesbeing in line with nace arch or roof construction which eliminates each other, and recesses in said side faces adconsiderable metal, replaces such metal with relajacent the lower portion of said block, said grooves and recesses communicating respectively with said end faces.

5. A refractory member for furnace construction, comprising a refractory block having oppositely disposed end faces, oppositely disposed side faces, and oppositely disposed top and bottom faces, a pair of grooves in each of the side faces adjacent the upper portion of said block, the grooves of each pair lying in the same horizontal plane, one of said pair of grooves on each side face extending beyond the center line of the block, and recesses in said side faces adjacent the lower portion of said block, said grooves and recesses communicating respectively with said 'end faces.

6. A refractory member for furnace construction, comprising a refractory block having oppositely disposed end faces, oppositely disposed side faces, and oppositely disposed top and bottom faces, a pair of grooves in each of the side faces adjacent the upper portion of said block, the grooves of each pair lying in the same horizontal plane, one of said pair of grooves on each side face extending beyond the center line of the block, said grooves being in line with each other, and recesses in said side faces adjacent the lower portion of said block, said grooves and recesses communicating respectively with said end faces.

7. A refractory member for furnace construction, comprising a refractory block having oppositely disposed end faces, oppositely disposed side faces, and oppositely disposed top and bottom faces, a pair of grooves in each of the side faces adjacent the upper portion of said block, the grooves of each pair lying in the same horizontal :plane, one of said pair of grooves on each side face being longer than the other groove on each of said side faces: and recesses in said side faces adjacent the lower portion of said block, all of said recesses being of equal size.

8. A hanger refractory member for furnace construction, comprising a refractory block having oppositely disposed end faces, oppositely disposed side faces, and oppositely disposed top and bottom faces, and a pair of recesses in each of said side faces adjacent the lower portion of said block, the recesses of each pair lying in the same horizontal plane, said recesses being capable of interlocking cooperation with main refractories for supporting the main refractories from the hanger refractory, the adjacent ends of each pair of recesses being separated by a web portion of the block which is at least as deep as the recesses.

9. A hanger refractory member for furnace construction, comprising a refractory block having oppositely disposed end faces, oppositely disposed side faces, and oppositely disposed top and bottom faces, a pair of grooves in each of said side faces adjacent the upper portion of said block, the grooves of each pair lying in the same horizontalplane, and recesses in said side faces adjacent the lower portion of said block, said grooves being capable of interlocking cooperation with supporting or retaining members, and the block having a solid web portion separating the adjacent ends of each pair of grooves, the web portion being at least as deep as the grooves.

construction, comprising a refractory block having oppositely disposed end faces, oppositely disposed side faces, and oppositely disposed top and bottom faces, grooves in said side faces adjacent the upper portion of said block, the block having a portion of full thickness extending vertically between the grooves, said grooves being capable of interlocking cooperation with supporting or retaining members, and a pair of recesses in each of said side faces adjacent the lower portion of said block, the recesses of each pair lying in the same horizontal plane, said recesses being capable of interlocking cooperation with main refractories for supporting the main refractories from the hanger refractory.

11. A hanger tile member for a furnace construction comprising a refractory block having rectangular top and bottom faces, substantially parallel rectangular side faces and substantially parallel end faces whereby such blocks can be' stacked in close juxtaposition, said block having oppositely disposed grooves in the side faces near the top, and oppositely disposed recesses in the side faces near the bottom, said block having vertically extending portions extending from one side face to the other side face horizontallyin line with the grooves and recesses, which por tions are as thick as the width of the top and bottom faces;

LOUIS H. HOSBEIN.

LOUIS ELLMAN.

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