Coke oven door

The coke oven door is provided with a sealing diaphragm which has a sealing strip which comes to engagement with the frame which defines the chamber of the coke oven when the door closes, a plurality of pressure elements each including a housing and an adjustable spring to apply a force to the sealing strip to tightly seal the door in the closed position. The door has a number of radial projections that have cast bores, receiving threaded bolts extending through a common cross-piece to which the housing of the pressure elements are also secured. Counter nuts are mounted on the threaded bolts to adjustably secure the position of the cross-piece and thus the housings of the pressure elements secured thereto, and thereby adjust the force applied by the spring to the sealing strip.

BACKGROUND ON THE INVENTION 
The present invention relates to a coke oven door of the type provided with 
a sealing diaphragm. 
Coke oven doors of the type under discussion have sealing diaphrams, the 
sealing lips of which are in contact with the frame of the oven chamber by 
means of pressure elements formed by adjustable springs acting on the 
sealing lips. 
With known doors of the coke ovens, housing parts for the pressure elements 
are either directly cast to the door body or screwed to the body of the 
door. In both cases, these housing parts are non-changeable in their 
position relative to the body of the door. In order to adjust a force 
acting on the sealing strip, threaded plugs have been required, which have 
been inserted in the end portion of the housing part, facing away from the 
sealing strip. 
With cast or molded housing parts, bores must have been drilled at the 
periphery of the door body, for example, about 80 bores if the door was 6 
m heigh. These bores were provided with internal threads to receive the 
threaded plugs. The latter also had to be treated to make external threads 
thereon. 
With the housing parts, which are to be screwed on the door body, it has 
been necessary to prepare the external surface of the door body and to 
form thereon threaded holes for securing separately made housing parts for 
the pressure elements to the body of the door of the coke oven. 
Both known solutions, however, have involved considerable expenses in the 
making of the function-ready arrangement of the pressure elements. 
SUMMARY OF THE INVENTION 
It is an object of the present invention to provide an improved coke oven 
door. 
It is another object if the invention to provide a coke oven door in which 
expensive threaded plugs as well as the special treatment of the door body 
for applying thereto of the pressure elements would be omitted. 
These and other objects of the invention are attained by a coke oven door 
comprising a body; a sealing diaphragm having a sealing strip; pressure 
elements, said sealing strip coming in contact with an oven chamber frame, 
by means of said pressure elements when the door is closed, said pressure 
elements being secured to said body and each including a housing, an 
adjustable spring, and a pressure member loaded by said spring and acting 
on said sealing strip, said body having a periphery and provided at said 
periphery with a plurality of projections cast therewith, said projections 
each having a cast through bore; a plurality of threaded bolts each 
received in said through bore and secured therein; and a cross-piece which 
is penetrated by said bolts and thus connects said bolts to each other, 
said housing of each pressure element being secured to said cross-piece. 
According to a further feature of the invention the oven door may include 
counter nuts mouhted in said threaded bolts for adjusting and securing a 
position of said cross-piece with the housings of said pressure elements 
to thereby provide a desired force acting on said sealing strip by means 
of said springs arranged in said housings. 
The cross-piece may extend parallel to said sealing strip. 
The novel features which are considered as characteristic for the invention 
are set forth in particular in the appended claims. The invention itself, 
however, both as to its construction and its method of operation, together 
with additional objects and advantages thereof, will be best understood 
from the following description of specific embodiments when read in 
connection with the accompanying drawing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring now to the drawings in detail, it will be seen that reference 
numeral 1 designates a cast door body which has at its periphery a 
plurality of projections 2 molded thereon. These projections 2 each have a 
roughly cast through bore 3 in which a threaded bolt 4 is inserted and 
secured there by means of nuts 5 and 6. The bolt 4 further penetrates a 
cross-piece 7 the position of which is secured by counter nuts 8 and 9. 
Reference numeral 16 denotes a sealing diaphragm. 
As can be seen from FIG. 2, according to a preferred embodiment, 
cross-piece 7 is held by two neighboring bolts 4. In this case three 
housings 10 of pressure elements 11 are rigidly connected, for example by 
welding to the cross-piece 7. A spring 12 is inserted in each housing 10. 
This spring 12 acts via a pressure member 13 on a sealing strip 14 of the 
sealing diaphragm 16 while the latter tightly comes in contact with a 
chamber frame 15. The sealing strip 14 itself is connected with the 
diaphragm 16 in the known fashion, which diaphragm in turn is connected in 
a non-shown manner to the door body, for example in a dot-like manner. 
By the adjustment of the cross-piece 7 at the threaded bolts 4, a desired 
force can be adjusted, which is exerted on the sealing strip 14 whereupon 
this adjustment will be secured by counter nuts 8 and 9. Also, in 
operation, a new adjustment can be performed in a simple fashion. 
Threaded plugs which have been required with conventional doors for coke 
ovens can be omitted in the arrangement of this invention whereby pressure 
elements are less expensive. The treatment of the door body for the 
connection of the pressure elements can be completely omitted because the 
connection take place by means of roughly cast bores 3 provided in 
projections 2. This results in cost reductions and substantial 
simplification of the manufacture of the oven doors. 
The arrangment of FIG. 2, in which two threaded bolts correspond to three 
pressure elements is the most advantageous. This results in the reduction 
of connection points of the pressure elements at the door body. It is 
understandable that other than the aforedescribed number of the threaded 
bolts in connection with the pressure elements could be provided. 
It will be understood that each of the elements described above, or two or 
more together, may also find a useful application in other types of coke 
oven doors differing from the types described above. 
While the invention has been illustrated and described as embodied in a 
coke oven door, it is not intended to be limited to the details shown, 
since various modifications and structural changes may be made without 
departing in any way from the spirit of the present invention. 
Without further analysis, the foregoing will so fully reveal the gist of 
the present invention that others can, by applying current knowledge, 
readily adapt it for various applications without omitting features that, 
from the standpoint of prior art, fairly constitute essential 
characteristics of the generic or specific aspects of this invention.