US1446744A - Refractory brickwork for water-tube boilers - Google Patents

Description

Feb. '27,741923.

REFRACTORY BRlcKwoRK FOR wAIER-TUBE olLE's.

man APR.25.Y1919..

Feb. 27,1923. y 1,446,744.

F. GRECO.

REFRACTORY BRICKWORK FOR WATER TUBE BOILERS.

man APR.25. 1919. s SHEETS-SHEET 2.

iwf/m0 w 5% 77@ WMM@ WM ATT'y.

3 SHEETS-SHEET 3.

F. GRECO.

REFRACTORY BmcKwoRK FOR WATER TUBE Bom-IRS.

Feb. 27,"1923 Patented Feb. 27, 1923.

FRANCESCO GRECQOF TARAYNTO, ITALY.l

REFRAQTORY BRICKWORK ron WATER-TUBEBOILERS... 'i

Application filed April 25, 1919. Serial No. 292,764.

To all whom t may conca/va.' K

Be it known that I, Francesco Gniioda subject of the King of Italy, and residing at rTaranto, Italy (whose post-oiiice address is z' Via Pisanelli 7, Taranto), have invented certain new and useful Improvements in Refractory Brickwork for *Water-Tube' Boilers, of which the following is a specification.

The present invention relates to improvements inY furnace wall construction, they principal object of the invention being to provide an improved construction whereby theV brick workis secured to the metallic frame or casing in such a manner that the use of holding bolts is entirely avoided.

- A further object of the invention `is to provide a furnace wall construction in which the brickwork is insulated from the metallic casing so that the bricks are permitted to freely expandV without injury to themselves or to the casing.

With the foregoing and other objects in view, the invention consists in the novel features of construction and combination ofparts which willrbe more fully set forth hereinafter, and particularly pointed out in the claims. l

In the drawings accompanying and forining part of this specification,

Fig. 1 is'an inside end view of a furnace constructed in accordance with the present invention and adapted to accommodate a water tube boiler of the well-known Du Temple type, the brick work being shown only at one side of the furnace;

Fig. 2 is a vertical sectional View taken approximately on the line E-F of Fig. l, the side wall of the furnace being shown broken away; I

Fig. 3 is a fragmentary sectionalview, taken approximately on the line A-B of Fig. l;

Fig. 4l is a sectional plan view. taken on the line C-D of Fig. 1,' looking in the direction of the arrows, only apportion of the brickwork and the insulation being shown;

Fig. 5 is an outside end view of the furnace;

Figs. 6 and V7 are fragmentary views of the side walls of the metal casing of the furnace, illustrating the manner of securing the brick work thereto;

Fig. 8 is a sectional view, taken approximately on the line G-H of Fig. 6;

Fig. 9 is aside view of the means Vfor securing the bricks-to the side walls `'of the` L metal casing'or frame; and

` Fig. l10 is a fragment of a sectional 'view i,

similar to V'F ig.

4,' but on -ay considerably larger scale.Y

`The samecharacters of referencel desigthe different figures.

nate the same parts in of the drawings.

Referring tothe drawings, 6 designates the end wall of the metallic frame or casing of the furnace, and 6 the side wall. i A metal plate` l, preferably of sheet iron, is secured at its upper'end to the end wall 6 'of the casing and extends downwardvat an angle therefrom', as shown in Fig. 2. 'The plateV lV isl curved' transversely of the furnace, as shown inFigs. 3, 4 and l0, such curvature merging into'a straightsurface attheupper'` portion` of the plate. The side edges of the platev l are formed as shown in Fig. 2, that isto say, they are tapered and curved from the top thereof'down to the top of the side" walls of the furnace, and are preferably inclined from thetop of such side walls to- 'Y ward the bottom thereof. An angle bar 2 conforming in contour to the side edges of v the Vplate l is secured to'each of said vside edges, the purpose of which' bar is to retain Viy the bricks against transverse displacement. The brickwork 3 is built up against 'the inclined curved face of the plate l, as clearly illustrated in Figs. 2`and-'l0, the'end'bricks of each tier being cut out to receive the dovetail formed by the'angle iron bars 2.' It will 90 an inclinedposition against the solid plate l, while, as hereinbefore` stated,V they are,

thus be seen that the'bricks are built up in held against transverse displacement by the angle barsV 2. "Forpermitting the free expansion ofthe bricks without `,injury"to themselves orto the casing, a layer of insulating material, such as asbestos, designated bythe reference numeral 7, is interposed Vbetween the plate l and the brickworkB.

For securing the brickwork `to the side walls 6 I have provided a plurality of angle v irons 8 which are adapted to be arranged vertically of the side Walls and ,spaced apart a suitable distance so 'as to form an interlocking member between the ends of adjacent bricks, as shown in Fig; 8, the end walls of the bricks being provided with va correspondingly shaped recess 11 to adapt them to closely fit the angle irons 8. For securing the angle irons tothe side walls 6 l have provided pair of anchor plates 9 for veach angle iron, adapted to lie one on each side of the side walls, and a bolt l0 adapted to pass through the plates and the side walls and into the angle ironsand be secured thereto by means of a nut, `as clearly shown in Figure 9. ln order to permit movement of the bolt 'and the angle iron to correspond with the expansion' of the brick, the opening through whichfsuch bolt passes through the sidewalls 6 may be of elliptical formation, as shown at a, Fig. 6, although such openings may be circular, but of a Vdiameter larger than that of thel bolts.V The triangular space formed between the bricks andthe angle irons 8 may be filled with insulating material, such as asbestos, as shown at 12 in lling. 8.

. lny the end wall 6 of the frame or casing are formed av plurality of openings having shutters twhich are adapted to open `inwardly. YTheopenings are of sufficient size to permit passage therethrough of a workmanl for the purpose of making repairs. The `fact that the doors swing inwardly, as indicated in Fig. 2,- causes thev shutters or doors to Vact in the nature of choking shutters, the openinginovement of which varies according to the difference in pressure between the' outside atmosphere and that withinthe firebox. This manner of mounting the shutters` also serves the purpose of preventing smoke from passing from the combustion chamber to the boiler-room when a fire: is being started, because at that time there 'is `no air pressure to force the ldoors open. Moreover, f the opening of the doors inwardly serves vto protect the boiler-room from steam in case any of the water tubes become damaged, as the shutters would close under the pressure of the escaping steam. Any` suitable locking device may be applied tothe shutters to retain them in closed position when desired, as, for instance, when two or more boilers arev operating in a single room and therel are other boilers in they sameroom not being operated. By keeping the shutters of the idle boilers closed, the air pressure within the room is not wasted. In the present instance a plurality of airpassages 5 are shown passing through the plates l and the brickwork 8, such passages-serving to create a circulation Laenge/r of air through the furnace, the air taken into the furnace through these passages having been heated to a certain degreeinthespace er boX formed between the plate l and the end wall 6 of the casing or furnace frame. if; plurality of smalldoors 13 may be provided in the side walls of the furnace for permittingV the removal of cinders, etc., one of such doors being indicated in Fig. 2.

From the foregoing itwill be seen that l have provided a furnace construction in which the use of bolts for securing the brickwork to the frame -is entirely eliminated, thereby rendering it unnecessary to provide holes in the bricks for the passage of such bolts, it having been found in practice that such holes are the principal causeof breaking of the brick, and that by reason of this construction the brickwork is maintained in position in a solid and substantial manner, while ample provision is made for the eX- pansion of the brick.

lt will be understood, of course, that this construction may be adapted for furnaces using coal as well as those in which a liquid fuel is used. i

lWhile l have described in detail the structures herein illustrated, it is to be understood that l do not thereby limit my invention to theprecise features of construction shown, as l am aware that many mechanical changes and modifications may be made therein without departing from the spirit and scope of the invention as set forth in the claim appended hereto..

Having thus described my invention,what l claim is:

ln furnace constructionthe combination of a casing havingendwalls and side walls, of a curved Vplate secured within the casing at an angle to one of said end walls, brickwork within said furnace built up parallel to said curved plate and side walls, means carried by the side walls and plate for preventing displacement of the brickwork, and insulating material between the brickwork and said plate and side walls.V n

In testimony whereof l have hereunto signed my name in the presence Vof two witnesses. y Y

YFRANCESCO GRECO.

Witnesses UL. Przzocono, T. BoRToLUzZA.

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