US2571597A - Coke-oven buckstay structure - Google Patents

Description

Oct. 16, 1951 lR. K. MILLARD COKE OVEN BUCKSTAY STRUCTURE 2 SHEETS-SHEET l Filed Aug. 22, 1944 Oct. 16, 1951 R. K. MILLARD COKE OVEN BUCKSTAY STRUCTURE 2 SHEETS-SHEET 2 Filed Aug. 22, 1944 Patented Octl 16, v.1951

COKE-VEN BUCKS'IAY STRUCTURE Y Robert K. Millard, Ingomar, Pa. AppllcationAugust 22, 19,9, Serial No. 550,568-

3 Claims. l This invention relates to coke ovens or the like and, in particular, to a door therefor of such construction as to prevent leakage of gases from the interior 'of the oven.

In coke ovens as constructed heretofore, elaborate provisions have been made for sealing the space between the door and the frame surrounding it. In one'form, the sealing means comprises flexible angles extending around all sides of the door and provided with screw means for seating the free edges of the angles against the door frame. in the first cost but also in maintenance. To keep the door frame in condition for making a tight seal with the flanges of the angles, the door frame has to be cleaned periodically which is an expensive operation.

I have invented a novel form of oven door which overcomes the aforementioned objections in that it is of simple construction, requires little or no maintenance, yet aiords ample protection against the escape of the, gases generated inside the oven through the spaces between the door and the oven walls. In a preferred embodiment, the door of my invention comprises a metal backing adapted to engage a door frame at one end oi the oven, the backing having a nose of refractory material extending inwardly therefrom adapted to t closely between the side walls of the oven. One or both the adjacent surfaces of the nose and oven walls have grooves formed therein defining vertical ues which open at their upper ends to the interior of the oven. Any gas tending to leak from the interior of the oven between thedoor and the oven walls collects in these fiues and is drawn upwardly therethrough and back into the upper portion of the oven from which it flows through the normal outlet for the gases evolved in the oven.

Further novel features and advantages of ythe invention will be pointed out in the following detailed description which refers to the accompanying drawings illustrating the preferred embodiment. In the drawings,

Figure 1 is a vertical longitudinal section, partly broken away, through a coke oven or the like equipped with doors embodying my invention;

Figure 2 is a partial section through the door and oven walls on the coke side taken along the plane of line II--II of Figure 1;

Figure 3 is a similar sectionthrough the door and walls on the pusher side taken along the plane of line III-III of Figure l; and

Figure 4 is a partial vertical section taken along the plane of line IV--IV of Figure l.

This construction is expensive not only Referring in detail to the drawings, a coke oven or the like indicated generally at I0 has side walls II built up between spaced buckstays I2 provided with diaphragm plates I3. The buckstays are H-beams disposed with their webs normal to the length of the oven'. This arrange'- ment minimizes the warping which has been experienced heretofore because of the fact that the anges of the I-beam usually employed which are adjacent the wall are subject to heating therefrom while the remaining flanges are subject to atmospheric cooling, resulting in differential expansion. With the construction illustrated the H-beam has the greater portion of its surface area exposed to the atmosphere, and a minimum portion exposed to the heat flowing through the wall. Thislatter portion furthermore, has the additional protection from the oven heat aiorded by the insulation value of the brickwork between the flanges and web of the buckstay. A suflicient number of diaphragmplates may be used to increase the cooling surface to the desired extent. y

The oven has a oor I4 and a roof I5. An cutlet IB is formed in the latter through which the gases distilled from the coal heated in the oven are removed. Oitake pipes (not shown) are connected to the outlet I6 in the usual manner. The roof lI5 also has openings therein (not shown) through which coal is charged into the oven. Vertical nues I'I are formed in the walls II near the ends of the oven and crossover flues tively, of the oven. Each door is composed of a metal backing 2| adapted to engage angles 22 secured to door-frame castings 23 extending between adjacent buckstays I2. Each door frame 23 includes a sill 23a adapted to be engaged by a shoe 2 Ia on the backing 2I. A refractory nose 24 is carried on the backing 2I, being held thereon by wholly embedded bars 25 and a T 2B extending vertically thereof. The sides of the nose 24 taper toward its inner end, conforming to the shapev of the side walls of the furnace adjacent their ends and leaving a minimum clearance therebetween. Yokes 21 welded to the .backing 2l facilitate the handling of the doors Il has an auxiliary door 29 which is opened'tof permit the introduction of the leveler bar.

Fiues 3l and Il are provided by grooves 82 formed in,one or both the adjacent surfaces oi thesidewallsoftheovenandthenosesofthe doors. The grooves extend vertically from substantially the bottom cf each door` to the upper end thereof. The grooves forming the iiues 89 curve inwardly adjacent the top ci' the door Il, as indicated at 3l. and are open to the interior of the oven. 'Ihe grooves forming the nues Il in the side walls of the oven extend slightly abovethetopof thencsels'. Thelowerends of the grooves I2 are tapered as at Il.

In the coking operation, large volumes of gases aredistilledfromthecoalheatedintheoven I8 andambstantialgaspressureisbuiltuptherein. As a result. there is a tendency i'or a portion oi' the gases'to iiow outwardly through the spac between the nose portions of the doors and the bythearrows 8l. Buch portionsofthegases, when they reach the ilues Il and Il, will have afreeexitpauitherealongandwillthusbereturned to the top of the oven on flowing out of theupperendsof theiiuesandwilltheniiow through the outlet Il along with the main mass of generated gases. It will be evident that the ilues Il and li thus relieve the gaspressure on the door. thereby limiting leakage. particularly when the coking operation is started. The clearance between the nose portions of the doors and the side walls of the oven should be as small as possiblebutitisnotnecessarythatthebacking 2l have a gas-tight nt with the iianges 22 carried by the door frame 23.

'I'he iiues saand sl, by carrying away gases which would otherwise leak out around the door. eliminate the nuisance of eaping smoke and the odor of the gases. :More important, they prevent the hot gases from impinging on the metal backing and frame of the door, preserving them from over heating and warping. This permits a smaller clearance between the door and its frame than has been safe heretofore, without the danger of injury to the brickwork on the door by fouling on the door frame when the door is closed. Themetalkeyingmembers llandtlareprotectedn'cmwarplnsbyheatingsincetheyare entirely embedded as contrasted with prior constructions in which a peripheral retaining tiange forthebrickworkisexposedtocontactwithleakins eases. y

Aspreviously'stated,thei1ues llandll may be provided by grooves formed wholly in the oven wallsorwhollyinthe noseportionsof the doors. instead of as in both. as illustrated. It may also mvedesirableforthecenterlinecttheiluesto depart from the plane between thel sides of the noseportionsandthesidewallsoitheovenadjacent the top. This can be accomplished by makingthegroovesintheovenwallsofanincreasingdepthatthetopandthegroovesinthe nose portions of diminishing depth. This reduces thepoesibilitythatcoalwillbepushedintothe mieshytheoperationsofthelevelerbar. 'I'he tapering of the grooves at the bottom thereof inniresthatanycoalwhichdoesoollectintheiiues willfallcutassoonasthedoorsareremoved.

Itwillbeapparent fromtheforegoingdescription that my invention is characterised by numerous advantages over coke oven doors as previously employed, particularly in toI simplicity of construction and the provision .20 adjacent surfaces of the oven walls as indicated,

theV for 4 preventing leakage of the gases from the oi the oven. The initial oost of to my invention is much less doors previously used and the is likewise much lower since clean the outer surfaces of the door frames odicallytoinsureashtiitofthe thereagainst. This results from the This eliminates also one ascension pipe, the spray and flushing system for one main and the ero.- over bridge to the exhausting main.

Although I have illustrated and described but a preferred embodiment of the invention, it will be understood that changes in the construction disclosed may be made without departing from thespiritoftheinventionorthescopeofthe appended claims.

I claim:

1. Inacokeovenspaoedwallsdenningadktillation chamber therebetween, each wall being built up between a pair of spaced, vertically disposed, metal H-beams, the webs of the beams beingnormaltothewallandtheendsofthe walls extending between the flanges of each beam, whereby the flanges at opposite sides of the web are subject to substantially equal heating. the web is protected from the oven temperature by the insulation of the wall portion between theiianges.andwarpingofthebeamsismini mined.

2. The construction as deiined by claim 1 characterised by diaphragm plates iitted between the said flanges.

ROBERT K. HILLARD.

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

UNITED STATES PATENTS Number Name Date Re. 20,515 Van Ackeren Sept. 21. 19,37 578,510 Garland Mar. 9, 1887 914,932 Donaghy Mar. 9. 19N 1,159,827 Coppell! Nov. 9, 1915 1,320,432 Wilputte Nov. 4, 1919 1,399,594 Wilputte Dec. 6, 1921 1,404,336 Becker Jan. 24, 1922 2,038,051 Lymn Apr. 21. 1936 2,207,562 van Ackeren July 9, 1940 2,275,400 Koppers Isar. 3, 1942 FOREIGN PAI'INTB Number Country Date 583,286 Germany Har. 2, 1934 637,252 Germany Oct. 24. 1939 884,286 France Aug. 9, 1949

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