US 3510404 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
May 5, 1970 'P. REUND DOOR STRUCTURE FOR HORIZONTAL COKE OVENS 5 Sheets-Sheet 1 Filed Aug. 21, 1967 May 5, 1970 P. FREUND ,51
DOOR STRUCTURE FOR HORIZONTAL COKE OVENS Filed Aug. 21. 1967 5 She ets-Sheet 2 Fig. 4
May 5, 1970 P. FREOND 3,510,404
DOOR STRUCTURE FOR HORIZONTAL COKE OVENS Filed Aug. 21, 1957 5 Sheets-Sheet 3 w mlllll I ll l HIIIIII l llll-llu May 5, 1970 P. FREUND 3,510,404 I DOOR STRUCTURE FOR HORIZONTAL COKE OVENS Filed Aug. 21, 19s? .5 Sheets-Sheet 4 May 5, 1970 P. FREUND DOOR STRUCTURE FOR HORIZONTAL COKE OVENS 5 Sheets-Sheet 5 Filed Aug 21, 1967 United States Patent Int. C1. C01!) 25/06 US. Cl. 202248 5 Claims ABSTRACT OF THE DISCLOSURE A door structure for use with a door frame of a horizontal coke oven, in which the door body comprises vertically spaced horizontal locking beams for respectively lockingly engaging hook means connected to the door frame and exerting sealing engagement between the door frame and the door body through sealing strip means extending around the periphery of the door body while lever means are interposed between said locking beams for equalizing the locking pressure exerted by the locking beams.
Provision of a plurality of vertically extending pressure transferring members respectively associated with the locking beams and operatively connected thereto permits having their ends respectively arranged at levels higher and lower than the respective locking beam pertaining thereto and in operative engagement with the door body for conveying thereto the pressure at which the respective locking beams act upon the respective hook means pertaining thereto.
This invention relates to a door for horizontal coke ovens with sealing means extending around the circumference of the door for self-sealing engagement with the door frame. Arranged on this door, at diiferent levels thereof are several, preferably two, horizontal locking beams adapted through the intervention of specific supporting elements to be brought into engagement with hooks provided on the door frame in such a manner that the weight of the door produces the pressure for holding the door through the sealing means in sealing engagement with the door frame. Between said supporting elements, means for equalizing the pressure exerted by the different locking beams are provided.
To bring about such equalization, connecting rods are known, each of which is connected to an intermediate lever in such a manner that the engagement of a locking beam with the associated hooks causes the intermediate lever to swivel and the other locking beam to move relatively to the associated hooks. It has also been proposed in connection with a coke oven door, to have pistons of forwardly inclined pressure medium cylinders act on said locking beams which latter with the door lifted off, loosely rest on the door frame, and which, when the door is being lowered, slide into the recesses of the hooks, said cylinders being rigidly connected to the door body, and the pressure acting in said cylinders being equalized.
With doors of this design, the pressure acts from the locking beam through a supporting element directly and only on that section of the door body and corresponding circumferential sealing means which is located at the level of the locking beam. A more even distribution of pressure could be accomplished by increasing the number of locking beams. Such an arrangement, however, would render both the construction and the operation of the door much more complex. When with ovens having a height of 6 meters or more, two locking beams only are employed, there exists the danger that the seal will 3,510,404 Patented May 5, 1970 ice not be tight, unless a degree of rigidity be imparted to the door body which would require a prohibitive amount of material and an excessive weight for the door.
It is, therefore, an object of this invention to provide a sealing door for horizontal coke ovens which will permit the use of a lesser number of locking beams, possibly not more than two, even in doors for comparatively high oven chambers.
It is another object of this invention to provide a coke oven door as set forth above which will assure a safe engagement of the sealing means on the door frame with the door throughout the height of the oven despite moderate weight of the door body.
These and other objects and advantages of the invention will appear more clearly from the following specification, in connection with the accompanying drawings, in which:
FIG. 1 is a front view of a door according to the invention mounted in an oven chamber;
FIG. 2 is a side view of the door of FIG. 1, the bottom and ceiling of the oven chamber being shown in section;
FIG. 3 is a view of a portion of FIG. 1, but on a larger scale than the latter, and more specifically shows a part of the door adjacent to the lower locking beam and to the two-arm lever of the equalizing linkage;
FIG. 4 is a side view of the arrangement shown in FIG. 3.
FIG. 4a is a horizontal section taken on the line IVa IVa of FIG. 3;
FIG. 4b is a horizontal section taken on the line IVb- IVb of FIG. 3;
FIG. 5 is a front view, similar to that of FIG. 3, of a somewhat different embodiment of the door according to the invention;
FIG. 6 is a side view of the arrangement according to FIG. 5;
FIG. 6a is a side view of the center portion of a fiat bar serving as vertical beam, with additional parts shown partly in section;
FIG. 6b is a horizontal section taken along the line VIb-VIb of FIG. 5;
FIG. 6c is a horizontal section taken along the line VIcVIc of FIG. 5.
FIG. 7 shows a slight modification of the ends of the pressure transferring members.
The door structure according to the present invention, which has sealing means around the circumference of the door and has a plurality of horizontal locking beams bearing against hooks on the door frame so that the door weight produces the sealing pressure while equalizing means are provided for equalizing the thus eifected sealing pressure, is characterized primarily by a pair of vertical beams having a sufficient moment of inertia parallel to the door back to transfer the pressure exerted by the locking beams from the supporting elements to parts of the door body located upwardly and downwardly of said beams. By definition, a sufiicient moment of inertia is one that enables the beam to overcome any resistance of the sealing means and to ensure even pressure of the same on the door frame.
In a door body having the shape of an outwardly open U in horizontal cross section, flat bars of sufiicient wall thickness may serve as vertical beams, and pins may extend through the upper and lower ends thereof and be conducted also through the side panels of the door body. If an equalizing linkage is provided, and this acts on an eye through which a pin extends which is parallel to the locking beam and connected thereto by transverse struts, such flat bars may be interconnected at the level of the locking beam by a transverse plate. This transverse plate together with fittings thereon defines a vertical guide slot for mounting the eye to the equalizing linkage. Moreover,
surfaces are provided for the rolling pressure engagement of the pin extending through the eye. The rolling pressure surfaces may be formed by plates attached to the surface of the transverse plate. Alternatively, however, it is possible to provide vertical slots for guiding the pin on both sides of the connecting crossties of the locking beam in the flat bars, the inner walls of said slots then forming the surfaces serving for the pressure engagement of the pin.
Alternatively, flat curved members open towards the door body, arranged in pairs and engaging the door body at their upper and lower ends may be employed to transfer the pressure from the supporting elements to the door body.
Referring now to the drawings in detail, reference numeral indicates the floor of the oven chamber and reference numeral 11 indicates the oven ceiling, with those parts thereof which are located adjacent to the oven head shown in FIG. 2. Reference numeral 12 indicates the approximately square sectional door frame. The sectional views 4a, 4b and 6b, 60 show the lateral confining brickwork 13 of an oven chamber adjacent to the oven head and the vertical anchoring posts 14. Provided on the door frame 12 are the hooks 15 serving to lock the door on the same.
In the door shown, the door body is formed by a uniform cast metal body of U-shaped horizontal cross section which has a front panel 16 and two side panels 17. Disposed on the door body is a fire brick door plug 18 which projects into the oven chamber. Furthermore disposed on the door body is a seal 19 extending over the entire circumference of the door and consisting, for example, of a metallic sealing blade. Said sealing blade 19 must be in tight engagement on all sides with the door and the door frame to ensure the gas-tight sealing of the oven chamber.
The parts first to be described are those required for enabling the door to be locked by its own weight, and the equalizing linkage known per se which serves to maintain equal pressure on the locking beams.
The hooks 15 of the door frame 12 are engaged by the locking beams 20-. Rigidly connected to each locking beam 20 are the two upwardly inclined struts or crossties 21, which at their other ends embrace the pin 22 extending through an eye 23. When the door is being lifted off, it is raised sufliciently for the locking beams 20 to be positioned upwardly and out of the hooks 15 so that the door can be withdrawn. When replacing the door, the beams 20 are lowered correspondingly to engage in the hooks 15, In order to ensure that both the upper beam 20 and the lower beam 20 in their end positions take up approximately equal locking pressures, the supporting elements formed by the crossties 21, the pin 22 and the eyes 23 are interconnected in the door shown by an equalizing linkage. The eye 23 is provided on a bar 24 (FIG. 4) of an approximately square cross section.
The bar 24 mrtaining to the lower locking beam 20 has its upper end pivotally connected by a pivot 25 to one end of the upper end of an adjacent rod 26, and similarly, the bar 24 pertaining to the upper locking beam 20 has its lower end pivotally connected to one end of an adjacent row 26 by a pivot 25. The two rods 26 have their other ends pivotally connected to two ends of a two-arm lever 29. Said two-arm lever 29 is pivotally supported by means of a pivot 28 in the bore of a tubular bracket 27 located centrally on the front panel 16 of the door body.
This mechanism ensures in a manner known per se that the crossties 21 of the upper and lower locking beams 20 assume identical inclined positions so that both pairs of locking hooks 15 transmit identical pressures onto the door body.
While with the doors known in the art, the supporting elements formed by the crossties 21, the pin 22 and the eye 23 transmit the pressure directly onto the door body, in the case of the door according to the invention the pressure is transmitted by the supporting elements 21, 22, 23 to the door body through intermediate links defined by vertical beams with a sufiicient moment of inertia. With the door shown, the vertical beams are formed by vertical flat bars 30. Extending through the upper end of each of the two pairs of fiat bars 30 are pins 31 and through the lower end thereof, pins 32 carrying also retaining rings 33 (FIGS. 3 and 4b) and extending on both sides through bores in the side panels 17 of the door body, which at this point are reinforced by inner linings 34.
The supporting elements 21, 22, 23 and the vertical flat bars 30 are interconnected as described below and as shown in detail in FIGS. 3, 4, 4a and 4b as well as 5, 6, 6a, 6b and 60.
At the level of the locking beams 20, the flat bars 30 are rigidly interconnected by a transverse plate 35. Said transverse plate 35 carries bars .37 and at right-angles thereto, flat bars 39 secured by pins 36 to the plate 35. In the slots 38 thereby formed, the mounting of the eye 23, that is, the square cross-sectional bar 24, can be moved up and down.
In the embodiment shown in FIGS. 3, 4 4a and 4b, abutments 37 are mounted on the outer surface of the transverse plate 35. The outer walls 40 (FIG. 4a) of Said abutments form pressure surfaces for the pin 22, which can come into rolling engagement therewith. Thus, the pressure of the locking beam 20 acts through the pin 22, the pressure surfaces 40, the transverse plate 35, the vertical flat bars 30 and the upper and lower pins 31 and 32, respectively, on the door body at points located upwardly and downwardly of the locking beam. In other words, the locking pressure is distributed over a larger area of the sealing blade 19 so that a better sealing of the oven chamber by the door is realized.
A transverse plate 35 is provided also in the embodiment according to FIGS. 5 and 6. The guide bars 39, which in this case are somewhat differently, that is, angularly shaped, are also held by pins 36 and form a slot 38 for the support bar 24 with its eye 23. In this other embodiment, the flat bars 30 are reinforced in thickness on both sides, said reinforcements 41 (FIG. 6a) extending to the slot 42. The walls facing the door body, of said slot 42, form the pressure surfaces 43 for the pin 22 extending through the eye 23. The height of the slot takes into consideration the fact that the crossties 21 can assume various inclined positions relative to the horizontal.
It is, of course, to be understood that the present invention is, by no means, limited to the specific embodiments illustrated in the drawings, but also comprises any modifications within the scope of the invention. Thus, the vertical beams with sufficient moment of inertia which transfer the locking pressure to the door body, may be constructed in many different other ways. Also, instead of connecting the pressure transferring members 30 to the portions 33 of the door body 16, 17, the ends of said members 30 may be rounded and directly engaging the fiat surface 16a of the door body as shown in FIG. 7.
What I claim is:
1. For use in connection with a door frame of a horizontal coke oven with vertically spaced hook means connected to said door frame, a door structure which includes: a door body comprising vertically spaced horizontal locking beams for respectively lockingly engaging said hook means, sealing strip means extending around the periphery of said door body for sealing engagement with said door frame, said door body being adapted by its own weight through said horizontal locking beams when the latter engage said hook means to establish sealing engagement between said door body and said frame through said sealing. strip means, lever means interposed between said vertically spaced locking beams for equalizing the locking pressure exerted by said locking beams upon said hook means, the said lever means actuating a sliding bar having mounted thereon for pivotal movement the horizontal locking beam, and a plurality of vertically extending pressure transferring members respectively associated with said locking beams on each side of the sliding bar and supporting the bar for sliding movement, the pressure transferring members having their ends respectively arranged at levels higher and lower than the respective locking beam pertaining thereto and supported on the door so that the transfer members are spaced from the door along its length and in operative engagement with said door body for conveying thereto the pressure at which the respective horizontal locking beams act upon the respective hook means pertaining thereto.
2. A door structure according to claim 1, in which said door body has a U-shaped cross section with the leg portions thereof forming the side walls of said door body, and in which said pressure transferring members are formed by flat iron elements, bolt means respectively extending through the end portions of said pressure transferring members and journalled in said side walls.
3. A door structure according to claim 2, which includes: plate means extending in the transverse direction of said door body and firmly interconnecting said flat iron elements at approximately the level of the respective locking beam pertaining thereto, strip means mounted on said plate means and defining therewith vertical guiding means, and means movably arranged in said guiding means and operatively connected to said lever means and the respective adjacent locking beam.
4. A door structure according to claim 3, in which said means movably arranged in said guiding means includes eye means, and bolt means extending through said eye means for engagement therewith, said pressure transferring members being provided with slot means adjacent the respective bolt means, each of said bolt means engaging that surface portion of the respective adjacent slot defining wall of the adjacent pressure transferring memher which faces away from the door body.
5. A door structure according to claim 1, in which said pressure transferring members have their ends provided with rounded surfaces respectively engaging the respective adjacent surfaces of said door body.
References Cited UNITED STATES PATENTS 2,759,884 8/1956 Gillott 202248 3,162,584 12/1964 Cremer et al. 202248 3,275,360 9/1966 Tucker 202248 NORMAN YUDKOFF, Primary Examiner D. EDWARDS, Assistant Examiner