US2518352A - Skew arch support - Google Patents

Description

Aug. 8, 1950 H. L. M FEATERS 2,5

SKEW ARCH SUPPORT Filed June 20, 1945 6 Sheets-Sheet 1 #7 s ATTORNEY s H. L. MCFEATERS 2,518,352

SKEW ARCH SUPPORT Filed June 20. 1945 6 Sheets-Sheet 2 Aug. 8, 1950 Filed June 20. 1945 Aug. 8, 1950 H. L. MGFEATERS ,5

SKEW ARCH SUPPORT Filed June 20. 1945 6 Sheets-Sheet 4 IIz ENTOR 41' Tusk-w W WM H l ATTORNEYS g- 1950 H. L. MOFEATERS 2,518,352

SKEW ARCH SUPPORT Filed June 20. 1945 6 Sheets-Sheet 5 x L W 7, Q 1 g t BY LZ M ATTORNEYS Aug. 8, 1950 H. MCFEATERS SKEW ARCH SUPPORT 6 Sheets-Sheet 6 Filed June 20, 1945 f I-NV NTOR #1 ATTORNEYS Patented Aug. 8, 1950 UNITED. STATES PATENT OFFICE SKEW ARCH SUPPORT Harry. L. McFeaters, New Castle, Pa.,assignor to Pennsylvania Engineering Corporation, a corporati on of Pennsylvania Application June 20, 1945,- serial No. 600,493 7 Claims. (01. 110-99) '.;'Ihis invention relates to inclined segmental arches and moreparticularly to means for supporting the inclined segmental roof arches of the ports of the hearth and uptakes of tilting open hearth furnaces.

.In tilting open hearth furnaces, the end of each hearth port is separated or spaced from the adjacent end of the cooperating port of one of the regenerator uptakes. These port ends are protected by water cooled chills which are usually hollow metal members secured to the steel framework of the hearth and regenerators respectively for protecting the outer ends of the port structures. Spaces are left between the outer faces of adjacent chills so that the furnace hearth can be freely tilted between the ports ofthe regenerator uptakes. l Prior to this invention, it has been customary to support the skew bricks for the port roof arches of tilting open hearth furnaces by heavy steel channels; the channels for the hearth ports being secured to the hearth framework immediately below and in position to support the ends of the roof arches and those for the uptake ports to the framework of the regenerators immediately below and in position to support the ends of the regenerator roof arches.

Since these roof arches are usually inclined, it has been customary to incline these channels the webs standing vertically) and to stack the skewback bricks for the different courses of the arches within the channels and on the lower flanges, with the backs of the bricks in contact with the webs of the channelsand with skewback bricks for the lowest course of each arch resting against the adjacent chill for such port end. Since the chills take the thrust due to the inclination of thearch there is a tendency for the stack of skewback bricks to slide down the inclined. channels. The chills are hollow, are usuallymade up of plate sections welded together, and do not provide satisfactory end abutments for heavy inclined arches. An object of this invention is to produce improved supports for the ends. of inclined segmental arches.

Another object is to. produce. improved sup- .ports for the ends of the inclined roof arches of the ports of tilting open hearth furnaces employing water cooled chills for the port ends.

A further object is to produce a pair of metal members for so supporting the ends of an inclined skew arch that each course of such arch is supported independently of the other courses and receives no, end thrust from the courses thereabove. V 1

A further object is to produce a pair of metal members for independently supporting the courses of an inclined skew arch.

These and other objects I attain by means of the structure described in the specification and illustrated in the drawings accompanying and forming part of this application.

In the drawings:

Figure l is an isometric perspective of a support member of this invention for supporting one end of a nine course inclined segmental arch;

; Fig. 2 is a view similar to Fig. 1, but in this view the member is adapted to support one end of an inclined segmental arch comprising seventeen courses;

Fig. 3 is a fragmentary View in side elevation ofthe port roof at one end of the hearth of a tilting open hearth furnace and the roof of the ce-operating uptake port of the furnace regenerator supported by means embodying this invention. This view by dot and dash lines shows portions of the furnace framework and one of the charging ports of the hearth, and illustrates the use of the support of Fig. 1 in supporting one hearth roof arch; the back of the support of Fig. 1- being shown. This view also illustrates the use of the support of Fig. 2 in supporting the roof of the regenerator uptake port co-operating with such hearth port; the view shows the back of the support of Fig. 2;

Fig. {l is a top plan View of the near half of the structure of Fig. 3; the furnace framework shown by dot and dash lines being on the opposite side of the furnace from that shown in Fig.

. Fig. 5 is an isometric perspective of the near half of the structure of Fig. 3 looking in the direction of the arrow from the line V-V;

Fig. 6 is a view similar to Fig. 5 of the near half .of the structure shown in Fig. 3, looking in the direction of the arrow from line VI-VI; V Fig. 7 is a more or less diagrammatic section taken on line VII-VII of Fig. 3 and illustrates the far side of the lowest course of the roof arch of the hearth port of Fig. 3;

Fig. 8 is a view similar to Fig. 7 and illustrates a portion of the far side of the lower course of the roof port of the regenerator uptake and is taken on line VIIIVIII of Fig. 3;

"Fig. 9 is a side elevational view of a modifled form of the support of Fig. 1; and Fig. 10 is an end elevation of the support of Fig. .9 showing the top and bottom courses of an arch in dash lines.

The support members of this invention are secured to the steel structure of the furnace in 3 the same manner and in the same positions as the channels of the prior art, and are diagrammatically disclosed in Figs. 3 and 4 of the drawmgs.

In Figs. 3 and 4, support members (only one being shown) for the hearth port roof arch comprising courses 2| are secured to the structural stelwork '12 of the furnace hearth im mediately below the ends of such arch. Sup ports 23 (only one being shown) for the port roof arch (comprising courses 24) of the regener= ator uptake are secured to the structural steel- Work 25 of the regenerator' immediately below the ends of such arch.

Each support member 20 is generally channel shaped, and is preferably forined as :a unitary steel casting, with the end portions 26 and extending at angles to the main or body portion thereof Within the channel and taking the plaee r the i we'r' flange or the main or body porti'on, i proi/ide' a series or steps or support su e faces 28 (in this case seven). The number of steps 61" supportsur aees' '28 c rresponds to the nurnqez "of courses -24, minus the end courses; the skew bricks for the end cou ses being su ported on the lower flanges or the angled end portions. v sup ort members so and '23 are secured in as position, as disclosed in Figs. 3, 5 and s so if at the upper faces of the steps or support f's'u ces and said -1ewer 'nahges' lie in parallel o zc'mfial planes. Steps 2'8 and flanges 2"9 arid it hind horizontal support s'urfa'ces' ffor inde .pendently supporting the skewback bricks for Each support 23 ror the roof arches of the ports of the 'i'egenerat'or uptaks is provided with If: of support surfaces 31, since there are seventeen courses in each of these roof arches;

the new bricks for the upper and lower end course being supported on thelower flanges 32 33 r the angled end portions 34 and '35,

gne end oft-he tilting hearth of an open hearth while the right-hand portions 0f Figs isclo'se epphsiie halves er the roof arch 0 Operating 'pbrt or the regnerator upfurnace for the speetiiiely r the S e tre members. Steps 3-4 take. Par't'ofthes'teel framework forthe hearth and regenerator and one of the charging ports '38 for the hearth are shown by not and flash in Fig. .3, this steel framework is shown eourse of each arch has its own horizontal "coniplementary support surfaces .for its skew bricks that i'SUICh course will produce no thrust against the next llower course. Each course oi each arch in supportes independently or the other courses the for this reason, there will be no eha thrust on the chills at the lower ends of the ports,

sliding movement in a downward direcnoh prevented by the "complementary hofl= 4 zontal steps which support each pair of skew bricks independently of the other pairs.

Each port roof arch, whether for the hearth or the regenerator uptake, may be a segment of the frustum of a cone or the segment of a, cylinder, but whichever type, the arch will be sloped-or inclined at an angle to the horizontal.

In the modified form of support member of Figs. 9 and 10, steps 39 extend horizontally. The supporting surface 40 of each such step is oblique and ilaas the same inclination as a Vskewbrick would have, if. employed. In other words, incliiied face 30 arse-e15 the end face of the end brick of thecour'se supported thereby in cooperation with the complementary surface on the support iniember for the other end of the arch. The angle or inclination of each support surface 40 differs from the angle or inclination of every other support surface 40 and such angle lifiation parallels the outer end 6f theend breach course of thearch. when the nc 7 cation of Figs. 9an'd 1-0 is employed, skew are iiriheeessary.

It will be apparent that supper-i members this invention whether designed to support skewbricks oi to function without s'levi'rbri'elc's rnay be made hollow for the purpose of being water cooled. 1

Having thus described iny invention what I 'ini as new and tissue to secure by Letters Patent is-: V

- 1911i: t ting hearth-regenerative fume-censu- 'ing each of the co 'op'erat-ing ports or the hearth and regeherators roofed by an arch having its longitudinal axis inclined to the horizontal, earnprising multiple contiguous courses extendin t ansveifsely of such and having their lower extremities stepped, means for supporting each c' oiirse of each s'uch ai'ch independently of the other courses thereof such means comprising a pair er spaced metal inerribers secured to the ffurn e structure immediately below the lower efitrem-i s of *such'aich courses; each such mem ber "comprising a unitary structure provided with a stepped series of s-upi oi't siirfaces and having its longitudinal axis inclined to the herizo'nta l, each support surface of one member of such pair "co' opefratiiig with the complementary support surface of the other member hr seen-pair in "suppo ting an arch hoarse.- r

V H :2. A -.'structureas =deii-ned=in claim 1,- in the support suireeee the horizontal.

' 3.- A *stiildtii-ie as defined iii-olaih'i 1, in which each metal member is generally channel-shaped and the support 'surfa s are horizontal.

. a. A structure as sensed "claim -1, in which th semen urfaces are inclined.

'5. structure as defined in claim '1, in which the siipportfsiirfa-ces -are inclined and arranged is p ra llel the iewer races of the end bricks oi "the arch courses to; be supported thereby.

6. Ina tilting hearthregenerativefurnacehav mg sachet the cmperating'ports of the hearth and re-generators 'iooletl by an arch having its longitudinal axis inclined to the horizontal, comprising ihju-itiple contiguous courses extending transvei" ly er "such axis and havin'g' "their lower extrem stepped, a pair of metal members secures; 0 the furnace structure immediately beloiif't'h-e' lower extremities of-each such arch, each siich member "comp-rising auniiary structure "protides with a stepped eries or support surfaces a u having its lon'giti'id'inal axis inclined to the horizontal, each support surface or one such member co-operating with the complementary support surface of the other member of each pair in supporting one course of one such arch.

7. In a tilting hearth regenerative furnace having each of the co-operating ports or the hearth and regenerators roofed by an arch having its longitudinal axis inclined to the horizontal, comprising multiple contiguous courses extending transversely of such axis and having their lower extremities stepped, a pair of metal members secured to the furnace structure immediately below the lower extremities oi each such arch, each such member comprising a unitary structure provided with a stepped series of support surfaces corresponding in number to the number of courses in the arch being supported; each support surface of one such member of a pair cooperating with the complementary support surface of the other member of such pair in supporting one course of one such arch.

HARRY L. McFEATERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 951,406 Mathes Mar. 8, 1910 1,006,111 Maxlow Oct. 17, 1911 1,019,035 Fortune Mar. 5, 1912 1,233,554 Cotton July 17, 1917 1,617,759 Jackson Feb. 15, 1927 1,683,963 Duquesne Sept. 11, 1928 2,023,174 Hoiman Dec. 3, 1935

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