US1738580A - Furnace arch - Google Patents

Description

Dec. 10,1929. R. J. HIMMELRIGHT 1,733,580

FURNACE ARCH Filed Aug. 15, 1924.

IN VEN TOR lug/4 1 P3 B Y A TTORNEVJ the bung brick 10. As shown,

Patented Dec. 10, 1929- UNITED STATES PATENT'OFFIClE. Y

RALEIGH J. HIMMELRIGHT, OF NEW YORK, N. Y., A SSIGNOR TO AMERICAN ARCH COMPANY, A CORPORATION OF DELAWARE FURNACE ARCH Application filed August 15,

M invention relates to furnace arches, and particularly arches of tilting furnaces, such as open hearth steel furnaces. The invention is especially concerned with the lateral support of such arches, and with obviating stresses or injury from temperature variations. How this and other advantages can be realized through my invention will appear from my description hereinafter of a selected and preferred embodiment.

In the drawings, Fig.1 is a fragmentary end view of a furnace and an arch constructed in accordance with my invention.

Fig. 2 shows a section lengthwise of the i rch, taken as indicated by the line 2-2 in I n Fig. 1 appear the side walls 5, and the arch 6. As shown, there is a charging door 3 in the left hand wall 5, and a tap opening 4 in the right hand wall. The roof 61is suspended from a suitable supporting structure,

. such as cross beams 7 resting on longitudinal beams 8 at the upper ends of uprights 9, here shown as buckstays for the furnace walls 5. The roof 6 comprises a series of transverse bungs 10 suspended from the cross beam 7 by hangers 11, and intermediate filler bungs 12 between and supported by the directly hung bungs 10. The brick of the bungs 10 have undercut heads 13 which rest on short anglebars or rails 14,-in the present instance, four brick to each rail. The rails 14 are held by pairs of grapple-like clamps 15 that hook under the rails. The edges of the brick 10 are shouldered as indicated at 16, and the corresponding edges of the filler brick 12 have shoulders 17 that rest on the shoulder 16. In the present instance, the filler brick 12 are split, and arranged in pairs between the bricks 12 bulge u ward in the middle, so as to give higher earing at their adjacent faces and so minimize the defects of gradual erosion on their security. Accordingly, the bricks 12 are considerably longer on their mating sides than on their supported sides.

The hangers 11 comprise sections 18, 19 flexibly and detachably interengaged by the hook-and-eye formation of their ends at 20, as illustrated in Figs. 1 and 2. The upper 1924. Serial No. 732,168.

taking down of the arch. As shown, there is one of the hangers 11 for each pair of the bars 14.

At the ends of the bungs 10 12 are abutments in the form of skew brick or blocks 25 resting on top of the walls 5, 5,.with an inter posed layer. of sand or the like 26 for sealing the oint. Laterally, the abutments 25 rest against longitudinal skew members or supporting channels 27. As here shown, the skew'member 27 at the left of Fig. 1 rests or engages loosely against the corresponding buckstays 9, and may, ifdesired, be suitably secured thereto. The right end skew member 27 is laterally sustained from another longitudinal channel member 28 (or series a of such members) attached to the buckstays 9. The right hand skew member 27 does not rest on the top of the wall 5 or on the brick 25 with which it isv associated, but floats free, so to speak, so as to be easily shifted laterally upon occasion. As here shown, it is suspended from the transverse members 7 by hanger rods 36 extending through its upper flange. At their upper ends, the hangers 36 are secured by capplates 21 and nuts 22, just as the hangers 11 are secured.

Having thus explained the general construction of the furnace illustrated, I will now explain the provisions for sustainin the arch laterally, even when tilted, so as to eep the arch brick tight at all times without trouble .from expansion as the furnace heats up. In stationary furnaces, for thispurpose as described in the copending application of Bradley Dobie, Serial No. 732,631, filed Aug. 18, 1924., but with a tiltingfurnace, the use of a spring sustaining device applied to the member 27 to keep the bung brick pressed tightly together and permit expansion is impracticable, since at the charging side of the furnace the prosprings may be used jection of such a device beyond the outer face of the wall would revent the chariilrllgdoor from being raise and opened, w e if it were applied at the ta ping side, thewei ht of the arch would be t rown against it w en the furnace is tilted, and to sustain this weight it would have to be so stiff as to exert excessive pressure on the arch when the furnace was not titled.

As shown in Fig. 1 the right hand member 27 is sustained from the member 28 by means of adjusting screws 40 threaded through flanged hubs 41 fastened to the longitudinal member 28. These screws 40 can be backed off to allow the roof to expand while the bottom of the furnace is being made, and it is bein fired up. After the roof is fully exan ed, the screws 40 can be ti tened up rm against the skew member 2%, so as to hold the brick of the bungs 10, 12 tightly together and to sustain the'thrust firmly when the furnace is tilted.

I claim:

1. The combination with a tilting furnace.

of a suspended arch therefor, a floating suspended abutment for the arch at the tapping side of the furnace, and a non-yielding supporting means engaging said abutment and adjustable laterally. I

2. The combination with a suspended arch of a tilting. furnace, and a floating skew structure therefor at the tapping side of the furnace, of screws for laterally sustaining said structure adjustable to. permit initial ex-.

pansion'of the arch and thereafter to afford 1tl firm lateral support when the furnace ti ts. Y

3. The combination with a suspended arch of a tilting furnace, of a movably suspended skew structure at the tapping side of the furnace, a fixed longitudinal frame member adjacent said. skew structure, and adjustable screws through said frame member engaging and laterally sustaining said skew structure.

In testimony whereof, I have hereunto signed my name.

RALEIGH J. HIMMELRIGHT.

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