US2491831A

US2491831A - Coke oven doors

Info

Publication number: US2491831A
Application number: US668155A
Authority: US
Inventors: Krieger Sidney
Original assignee: ALOIS W GRAF
Current assignee: ALOIS W GRAF
Priority date: 1946-05-08
Filing date: 1946-05-08
Publication date: 1949-12-20
Anticipated expiration: 1966-12-20

Description

M. M. WLM'CZWOFF Umm @VEN DOCRS www., HW,

3 shee-mmsneet l Filed May 8, 1946 ff//A U, 1949 A. A. RACKOFF 294%831 COKE vOVEN DOORS Filed May 8, 1,946 3 vSheets-Sheet 2 COKE OVEN DOORS Filed May e, i946 3 sheets-sheet 3 IN V EN TOR.

@m MMM@ Patented Dec. 20, 1949 UTN PAT E NTV UFFICE COKE OVEN DOORS AdolphAgRackofE, deceased, late of Gary, Indaby ,Sidney Krieger, administrator, Gary, Ind., as-A .signor to Alois W. Graf Application May 8i, 1946, Serial N o. 66,1455` 5 Claims. .l

This invention relates. to an improvement in coke oven doors.

The doors used `atpresenton.coke ovens must be lifted entirely oir the .door l:traine and carried away vby a. machine called a. door extractor. ASome doors are made gasitight byi luting.. that is, packing clay around. the cracks of the door. @ther doors are self-sealing that is they have a .knife edge which bearsion. .the door frame under spring pressure. VxIlrerrIi-t"y isflesired. to open the coke oven door the extractor unlatches the door, .lifts it orf its supportgsand. thencarries it away. Since the .doors are iti requires a heavy .extracting machine. to: handle them'. On the vpusher `side of the loven! the extractor is included asf` part of .thepusher,. While on the"` disicharge side` it is an` independent machine. To make even minor repairs itis. necessary to remove` the door anclf install? another.` door in its place. These doorsare unsatisfactory becamse of the diicu'lties of maintenance and" because` of the heavy and.expensivemachinerynecessary/tto open and` close them.

It is an object off this; invention .to-provide an improved cokeiovezr door which need not be removed When the coicef-ispusliedtoutof the oven'.

It isa further object of; invention to pro*- vide an` improved colceoven. doorstrueture which isE economical to operate and; maintain'.

It. is another object .of tirate-invention. to provide a rotating door mounted. on pivots and shaped:A so that' it; willallawf a: clear passage of the coke and ramrwhenr swungt'o an: openposition.

Another object ofthis inyention i'sto: provide suche. door'which canbesil-nngthrough anan'gle of 180 to' provide.- forinspectom and repair of its refractoryface.

These and other cxbects' will bemore" apparent after referring. to theffollow-ing' specification an attached drawings. iniwhich:

Figure 14 a `frontielc-iva'tion.oibl the door in place in closed: position;

Figure 2l is a` sectional..vitaes taken: on'the line 22-2 of Figure 1.;

Figure 3 is a. top plair view'taken1-on1the line 3--3 of Figure-:2;

Figure'lt is a sectional vi'ewftekenen` the-line 4-4`of Figure 2';

Figure 5isV axsectionalv-iew takenon the line 5--52 of Figure 2;.

ligure'disaviewsmilar tirEgure but showing the door openrpositbmr Figure 7 is a lsectional.vienrtekenen?.the line 'le-J ofi Figure'. 2;.,

Figure 8 is a sectionalview taken onfthe line .8 8 of Figure 2;

Figure 9 is an enlarged horizontal sectional view of the door frame;

Figure 10 is' a front.elevation` of the top portion of the door frame;

Figure l1 is a sectional Viewv takenon the line tI--ll of Figure 9; andv Figure 12 is a plan vewof a coke oven showing. a door in various positions.-

Referring more particularly to; the drawings, the coke oven hasan'` entrance 2 into the coking chamber. It will .be understood that .the coking `chamber is of substantially the' same cross seetional shape throughoutfits length'- and that the doors at the pusher endl. and .the coke end will `be of the same type although the width of the chamber atv the pusher' end isslfightly less than that at the coke end. The refractory brick work 4 of the oven.-` has` an". embedded metallic' door frame 6. On` each side of thefopening' 2 are the conventional vertical leuckstaysj 8. As best shown in Figures 9, l0 andi 115,v the door frame" has a cylindrical. concave inner surface t0 at each side anda flat upper surface |12?. The' door frame" is fastened to the buckstays 8 in anysuitable manner. As shown, a bolt t4 passes' through a plate I5 and is fastened to` thebuckstays 8'. The plate I5 bears against the frame" 6 and holds it ihL posil tion'. The `door `loody I6 has a cylindrically shaped convex inner surface I8 which' is connected by a relatively straight outer surface 2U. The door body is made of a. reinforcing metal skeleton 2'2 which may be a single casting.' or may be fabri- 1 cated from a plurality' of parts' riveted or welded together. The. flanges 24 of the reinforcing skeleton 22` are cylindrically' shaped and have substantially the sa'm'efradius' as the cylindrical surfaces lll of the door seat; The skeleton 22 ist filled with a? refractory' material 256 which" is set back of the flanges 24 to' provide a' certain clearaifice 2S; A seal-ing" groove: 30" is out in the door` bodyilanges 24 and' extends entirely around thedoor body. The groove 31l`lia's an inlet'32 and ner. Beneath the plate 42 is a cam 44 which is fastened and keyed to the trunnion 38 by a bolt 46 and a key 41. Adjacent the cam 44 is a plate 48 which provides a surface against which the cam 44 bears. Extending outwardly below the plate 48 is a bracket 5U having a bore 52 threaded on its outer end for receiving a spring loaded screw 54. Acam follower 56 is provided in the bore 52 and a spring 58 presses it against the cam 44. Connected to the top of skeleton 22 is a top trunnion bracket 68. A trunnion pin 62 is tightly keyed to the top trunnion bracket 6D by means of a key 63 and extends upwardly through a bushing 64 which has a square outer surface. A bevel gear 66 and a cam 68 are keyed to the top of the pin 62 by means of a key 69. Meshing with the bevel gear 66 is a bevel pinion gear 10 which is mounted on a pin 12 for movement therewith. The pin 'I2 is carried in bearings 14 of a bevel gear housing 16 and has a square outer end 18 which is received in the socket 88 of the power driven wrench. On the pusher side of the coke oven the wrench may be mounted on the pusher while on the coke side the wrench is separately mounted. The square bushing 64 i'lts in a slotted hole 82 of a bracket 84 which is attached to the'coke oven in any suitable manner and has a permissible movement 86 which equals the throw of the cam 68. Similar clearance 88 is provided in the plate 42 to permit clearance between the door body and door frame during rotation of the door frame. The cam 68 also is provided with abearing plate 48, a bracket 50 having a bore 52, and a spring biassed cam follower 58, all arranged around the cam 68 in the same manner as around the cam 44 as described above. A pocket 90 is provided in the outer surface of the door for picking up and handling the doors when they are being replaced.

When it is desired to close the doors for coking, the socket 88 of the wrench is placed over the square head 78 of shaft l2. The wrench is then rotated which rotates pin 62 through bevel gears 66 and lil. After the door is rotated through an angle of about 90 from the open position shown in Figure 6 to the closed position shown in Figure 5, the rotation is stopped and the wrench removed. During this rotation the

cams

44 and 68, respectively, bear against their respective cam followers 56 to slide the door through the

distance

86 and 88, thus forcing it against its seat. The sealing solution is then pumped into the groove 38 through the inlet 32. rThis closed position of the door is shown in full lines in Figure 'i2 and is indicated as position A. When it is desired to open the door to discharge the coke from the oven, the door is rotated in like manner through an angle of 90 to either position B as shown in Figure 12. During this movement the

cams

44 and 68 bear on the surfaces of plates 48 to break the seal. The distance between the

door pivot bolts

46 and 62 and the outer door surface 2G is equal to approximately one-half of the width of the opening 2 so that when the door is rotated through an angle of about 90 from the closed position, the entire door is back of the side walls of the coke oven as shown in Figure 12. This permits the pusher ram to push the coke from the oven without interference. When it is desired to open the doors for inspection or for repairing the inner surface thereof, they are rotated 180 from the closed position. This throws the surface I8 to the outside as shown in position C in Figure 12 so that the refractory 25 can be repaired.

While one embodiment of the invention has been shown and described, it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.

What is claimed is:

l. In a coke oven the combination comprising a cylindrical door seat,; a door ,body having a cylindrically shaped inner surface, the cylindrical door seat and cylindrical inner surface having substantially the same radius, a grove in said door for providing a seal between said surface and said seat, top and bottom pins spaced outwardly from the outer surface of said door for pivotally supporting said door body, means for permitting movement of the pins toward and away from the door seat, a cam mounted on each of the pins, an inner surface against which the cam bears to break the seal when the door is opened, and an outer surface against which the cam bears to lhold the door body against the seat when the door is closed.

2. A coke oven door comprising a cylindrical concave door seat, a door body having a cylindrically shaped convex inner surface connected by a relatively straight outer surface, the cylindrical door seat and cylindrical inner surface having substantially the same radius, a groove in said door for receiving sealing material to produce a seal between said seat and said door, top and bottom pins spaced outwardly from said outer surface for pivotally supporting said door body, means for linearly moving the pins toward and awayv from the door seat, including a cam mounted on each of the pins, an inner surface against which the cam bears to break the seal when the door is opened, a spring biassed outer surface against which the cam bears to hold the door body against the seat when the door is closed, and means for rotating said door.

3. A coke oven door comprising a cylindrical door seat, a door body having a cylindrically shaped inner surface connected by a relatively straight outer surface, the cylindrical door seat and cylindrical inner surface having substantially the same radius, a groove in the inner surface of said door extending adjacent its edges for receiving sealing material to produce a seal between said door and said seat, conduits interconnecting said groove with the outer surface of said door, top and bottom pins spaced outwardly from said outer surface for pivotally supporting said door body, means for moving the pins toward and away from the door seat, including a cam mounted on each of the pins, an inner surface against which the cam bears to break the seal when the door is opened, and an outer surface against which the cam bears to hold the door body against the seat when the door is closed.

4. In a coke oven,v the combination comprising a door seat having vertical sides in the form of sections of a cylinder, a door body having a cylindrically shaped inner surface and a generally flat outer surface, said inner surface and said vertical sides of said door `seat having substantially identical radii, top and bottom pivot supports for said door spaced Voutwardly from said flat outer surface, a sealing groove provided in the inner surface of said door body adjacent the edges thereof, conduits interconnecting said groove with the outer surface of said door whereby sealing material may be supplied to said groove, a cam mounted adjacent each of said pivot supports, means for rotating said cams and said door body, inner surfaces against which said cams bear to break the door seal, and resiliently biassed outer surfaces against which said cams bear to hold the door body against said door seat.

5. In a coke oven the combination comprising a door seat having concave surfaces, a door body having inner convex surfaces generally complementary to the concave surfaces of said seat, said door body having a generally iiat outer surface, supporting means located at opposite ends of said door body, a pivotal connection formed in each support for rotating said body about an axis displaced from said outer surface, a cam connected to each pivotal connection for producing a linear horizontal movement of said connections and said body, and means for rotating said cams and said body through an arc of 90 Whereby the at outer surface of said door will be parallel to the vertical edge of said door seat and said door seat will be unobstructed.

SIDNEY KRIEGER,

Administrator of the Estate of Adolph A. Racko,

Deceased.

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

UNITED STATES PATENTS Number 20 Number Great Britain ca. Sept. 7, 1911 France Sept. 10, 1929