US1463240A - Suspended arch construction for furnaces - Google Patents

Description

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F. E. EIGELOW r SUSPENDED ARCH CONSTRUCTION FON FURNACES Filed April 'L 1920 2 SheS-Shat l F. E. BHGELQW SUSPENDED ARCH CONSTRUCTION FOR FURNACES x Filed April 9, 1920 2 ShetE-Shet 2 essere einer SUSPENDED .PECHCONSTECTQN E'R FURNTES.

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.Be it known that I, FRANK B.' BGnLow9 a, citizen of the United States, residing at Detroit, in the countj)7 of Wayne and State of Michigan, have invented certain new and useful Improvements in Suspended Arch Constructions for Furnaces, of which the following is e specification.

improved means for the support and znsintaining in position of the arches of furnaces, lot, or otherwise, such asare em- .ployed in steam power plants, constitute the Subject-matter of the present invention, its leading objects beingr the supporting4 of the bricks constituting the arch in such e 1nan ner that the supporting' ineens shell be propn erly protected from the heat of the furnace, shell permit the ready removal and the replacement of one or more or the bricks, and sheli assist in distributing some of the air -to the combustion chamber ii' required or desirable.

in order that 'the sttainlng of these and other objects by the employment or this invention may be fully understood by those skilled in this artehave illust-rated a desirehle embodiment of the sanne in the eccompeuying drawings forming a part of' this specification und throughout the various views of which like, reference characters refer to the seme parts.

In the drawings:

Figure i is a vertical cross-section through a portion of e furnace of the Murphy type with a V-shape grate end opposed fuelmagazines at its opposite sides;

Figure 2'pis a vertical section on line 2--2 of Figure l;

Figure El is a pian-view of the fiat arch and its supporting-Ineens;

Figure ei is a face view. and Figure an end view of one of the brick hangers.

l fis is usuel in furnaces of this type.` there is s pair of oppositely-facingr sidewisefeeding fuel-magazines and 2l, with the customary aching-plates 22 and Q3, coelpusliers or striking-boxes 24 and S25, and in- ,ciined rate-bars 26 and 27 forming the V- shape grate. To the. inner sides of the magazines, by means of bolts 28, two brackets 2f) and -fOere fustended and disposed lengthwise the furnace, rising above the tops of the magazines as shown in Figure l.

Resting on and riveted to ledges 3i on the inner vfaces ci3 these plates ere e plurality,

.spart y slightl (in the present instance tl'iree), o1? pairs of back to back., that is, web to web, yet spaced to receive between them the upper ends ot a number of upright,.at, sur porting bers or narrow plates 33 secured to the two bars of each pair by rivets 84 through their Webs, the lower portions of the plates extending below the bottom flanges of the bars, as shown. These plates ere arranged in straight rows lengthwise the furnace and in apertures in their lower ends e plurality o parallel pipes are supported, each pipe' extending,- into an opertured boss 36 in the furnace front-plete 375 end running back to the rear of the arch.

0n these pipes or hollow tubes the indi.- viduel bricks ere hunger supported in such :i Way that if any one or more burns out, replacement can be readily eeoted. Each brick hanger, es shown in Figures i end 5, has thickened upperpo-rtion 38 with e hole 439 therethrough by ineens of which it is supported on one or7 the pipes, the pipe extending through the hole, and, in order to permit the hanger to rock in a direction lengthy1 in opposite directions from the lower pon',

tion of the web. lt is this part which is intended to support e single brick, and for this purpose the top portion of the briclr il has un undercut groove i3 receiving such supporting 'toot and a portion of the .Web Each brick has its own separate end independent hanger.

As is shown in the various iigures, each pipe supports e number of these `hangers und their bricks9 the former heinf spaced apart on the pipe by sleeves or co lars M. The forward brick of any longitudinal row is in engagement with. the Wall or lining e5 (Figure at the front of the furnace, and the rear-most brick i6 of special shape'entending upwardly over the backend of the corresponding pipe is held from displacelil dfi@

ment by a bolt arch proper, portions of the bricks underthe arch is clearly shown in libg- 'ure l. rlihese pipes or tubes 5l may like- Wise be equipped with spacing spools or sleeves 51e and the sockets or recesses in the tops of the bricks do not extend all the way across 'the bricks7 otherwise the hangers would oe exposed to the action of the tire.

The opstanding part of each rear-most brick liti is provided with a hole 52 1n register or alignment With thel corresponding pipe, these holes being ordinarily closed by batches or plugs of tire-clay 53. Above these bricks the back portion of the furnace is closed by bricks 54 supported on a plate 55 secured to the back pair of hanger bars 32. Above the latter the furnace is closed by one or more readily-removable cover-plates 56.

rEhe space above the arcl'i-bricks et the front part oi' the furnace is divided into longitudinal sections by a pair oi partition Walls 60 and 6i (Figure 3), extending rear- Wardly of the furnace from the front-plate. Each lof 'these Walls ma" be composed con venientiy of one or more suitably-shaped sheet-metal plates. Between the partitions 50 and 617 the furnace iront-plate 37 I is apertured at 62 at one or more places, for the entrance of the outside air.

portion oit the air for combustion enters the furnace through the opening or openings 6*? and in p'assing rearwardly over the arch becomes heated. lllhen such air reaches the inner ends ot' the partition walls il() and 6l, it passes around them and enters the combustion chamber through the spaces or dues between the arch-plates and the sidebricks 48. Another portion of the air enters the front of 'the 4Furnace through apertures in register with the cold-air boxes or flucs beneath the coking- plates 22 and 23 and is more or less heated in its traverse through the conduits. lt then passes upwardlyr through passages 63. 63, (Figure l), back of the rear-Walls of the magazines. into the space above the arch7 from which itV in turn entersthe combustion chamber between the ribs on the arch-plates in the customary manner. lt should be observedfurthermore, that an additional portion ot the air enters the furnace and passes through the piuralaereo ity of pipes 35,*beiug delivered through the 'rear ends oi the pipes to the back portion of the furnace above the arch, from which place it lows in the usual manner down into the combustion chamber. Obviously. by such passage of the air, these supporting tubes or pipes are maintained cool and prevented from injury and damage by reason of excessive heat, and at the same time. air is discharged into a desirable portion of the furnace construction.

ln some instances. it may be desirable topertorate one or more ot the supportingpipcs and its spacing collars or sleeves as partly indicated at 64 in Figure 3. By proper spacingr of 'these apertures or air discharge holes an),v suitable and desirable distribution oi2 the air in the space above the arch may b e secured. and at the same time. such air will bc employed to perform the cooling 'function oi the supporting pipes themselves. ln Figure l have shown only a. feu' of the pipes as perforated, but it is to be understood that any' number of them may be so constructed andthe holes may be located and spaced as seems the best.

Assuming that one of the bricks d2 lies become damaged sufficiently to require replacement, the old brick is removed and a new one put in place in the following manner. rThe plug,T of fire-clay 53 is taken out and the retaining-pin 4T is removed. Then a follower rod of substantially thesarne caliber as the exterior of the pipe is placed in alignment with the pipe through the hole 52 and pushed forwardly., carying' the pipe with it, the pipe protruding through. the furnace front-plate as will be readily u .erstood inasmuch as the rod directly follows the end ot" the pipe all of the bricks will remain properly supported. rlhe rear end of the pipe is pushed through the apen ture of the injured brick hanger or support and then the rod is retracted slightly. leav ing a small gap between the pipe and rod. thus vfreeing the hanger of the damaged brick from the supportaud thus pernfxittinsj the removal of such brick and hanger. To facilitate in displacing the brick ivhen thus released, one or niore of the cover-or top plates 56 may be temporarilr taken off., thus giving access/to the brick and hanger from above.

As soon as the new' brick' and hanger are in place, the pipe is pushed rearwardly, carryingn the supporting or follower rod with it, thus engaging' the hanger et the new brick as well as all the other aligned hang"- ors as in the original condition of things. lhe rod ot course. passes rearwardly out through the hole 32 which may again be plugged up. The cross-pin 47 is also put in place. ln this Way any one or more bricks may be replaced, the archplute bricks being manipulatedy in much the saine Way during assenso change of bricks. The follower rod acts as a temporary support for the bricks and maintains their hangers' in register ready to again receive the supporting pipe. As is obvious, the sleeve assists in keepin the pipe and rod in alignment. The bevelmg of theV holes in the-hangers facilitates inserting of the rodor plpe as well as permitting a possible rocking movement ofthe hangers on tbe ill those skilled in this art it will be clear that many minor mechanical changes may be made in the structure described and illustrated without departure from the heart and essence of the invention' and Without the sacrifice of any of its substantial benefits and advantages. For example, the brackets, 29, 3() maybe cast on or bolted to Vthe arch-plates of the Iinner walls of the magazine and the panel-bars 324 need not be necessarily riveted or otherwise fastened -to the ledges 31.

I claim: In an arch-construction of the characterl described, the combination of a plurality 0:2

individually from said member, a back wall,

for the space above the arch apertured in register with' said member and removable means normally closing said'back Wall aperf ture, the construction permitting the remov al of any hanger and its injured brick v shifting the' member' longitudinally -su ciently through one of said apertures to, free' the hanger of the injured brick therefrom and .temporarily supporting the remainder of the bricks not susta ined by the member in its new position'by a follower introduced through the other aperture. i

' FRANK Le. BiGELoW.

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