Note: Descriptions are shown in the official language in which they were submitted.
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The present invention relates to a door of a coking
oven. More particularly, it relates to a coking oven door which
includes a metallic door body and a door plug mounted on the door
body and constituted of a refractory ceramic material.
Coking oven doors of the above-mentioned general type
are ~nown in the art. In a known coking oven door, a sealing
member is provided which is connected with a diaphragm and has an
edge abutting against a sealing face of a chamber frame under the
action of a pressing member. Locking means are provided in the
upper and lower regions of the coking oven door and connected
with the door body.
The sealing members for sealing metal to metal in the
coking ovens are provided in different forms such as flat iron,
L-shaped profile, Z-shaped profile and the like. They are
mounted on diaphragms. A11 these sealing members are elastic in
a greater region and brought into contact by pressing elements
such as spring-bias~ed pressing member. However, these sealing
members must be adjusted from time to time, in correspondence
with the deformation of the door body and/or chamber frame. This
i9 attained by subsequent adjustment of the pressing members or
mounting members.
It has been shown in practice that the known steps for
the above mentioned subsequent adjustment, which are required for
providing abutment of the sealing member against the ahamber
frame, are not always sufficient. This is true particularly for
coking doors having relatively great construction height. The
deformations of the door body take place because of various
temperature differences, such as, for example, in operation
during the coking time, on the one hand, or changes of throughput
capacity, on the other hand. In condition of such deformations,
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the known constructions are not always satisfactory in obtaining
reliable closure of the chamber, over a long time. Elastic
sealing members which are adjustable on the door body and brought
into abutment by the pressing elements against the chamber frame
deformed under the action of heat, allow leakage directly after
the filling coal into the open chamber. This is particularly
true after longer operational time when the deformation of the
chamber frame or the door body is so great that satisfactory
adjustment for maintaining the originally planned and designed
abutment line of the edge of the sealing member cannot be pro-
vided. In the construction wherein the diaphragm with the seal-
ing member is adjustable but in principle is firmly connected
with the door body between the adjustments, the working region of
the edge of the sealing member and the pressing force change
because of the deformations.
Accordingly, it is an object of the present invention
to provide a coking oven door which guarantees reliable sealing
relative to a chamber frame without time-consuming and labor-
consuming adjustment of a sealing member.
In keeping with these objects and with others which
will become apparent hereinafter, one feature of the present
invention resides, briefly stated, in a coking oven door in which
a diaphragm with a sealing member as well as a pressing element
are mounted on a door body, a door plug is mounted on the door
body with formation of an intermediate chamber therebetween, and
a mounting plate of the door plug and a plug holder mounted
thereon have contact faces which are kept as small as possible.
Since the door body and the door plug are arranged so
as to form the intermediate hollow space therebetween, the
temperature which reaches the door body is considerably smaller .
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than it would be in the case of direct contact of the door plug
with the door body. This means tha~ variations of the
temperature in the door body either do not take place or are
insignificant.
This guarantees that the adjusted working region of the
edge of the sealing member remains identical to the end of the
coking process with higher temperature of the refractory member
of the door plug and during subse~uent insertions with lower
temperature of the refractory member of the same.
This effect is further improved by the fact that the
membrane and the sealing member are not arranged on the door plug
as is conventional in the art, but instead are arranged on the
relatively colder door body. When these members were arranged on
the door plug, each flexure or longitudinal deformation of the
door plug results in changes in the distance to the pressing
members. In contrast, the mounting of both the diaphragm and the
pressing member on the door body results in maintaining this
distance constant. Variations on the edge of the sealing member
under the action of the temperature in the chamber frame are
thereby needed to be taken up only by the pressing members.
Since the contact faces of the mounting place of the
door plug and of the plug holder which is mounted on the mounting
plate are maintained as small as possible, the heat transition
from the heated refractory member to the mounting plate is
reduced to a minimum. In such a construction, it can be provided
that the mounting plate takes up at the refractory member side
and at the opposite side identical temperatures so as to elim-
inate deformation because of a temperature differential, which
otherwise can lead to mechanical loading of the door body.
Longitudinal deformations of the door plug because of diffusion
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of graphite or thermal post expansion can be compensated by
suitable mounting members relative to the door body.
The above-described combination of the door plug ar-
rangement with the separation of the door body and door plug as
well as with the mounting of the diaphragm and the pressing
members on the door body, can provide for reliable sealing rela-
tive to the chamber frame, in condition of adjustable varied
distance in the event of a deformed chamber frame.
In accordance with another feature of the present
invention, the door body is provided with a plurality of limiting
or stopping members which are distributed over the periphery of
the door body and spaced from one another in a circumferential
direction. When the coking door is designed in accordance with
this feature, the door can be brought by a door servicing machine
to its predetermined location relative to the chamber frame and
the locking hooks.
The novel features which are considered as character-
istic for the invention are set forth in particular in the ap-
pended claims. The invention itself, however, both as to its
construction and its method of operation, together with addi-
tional objects and advantages therefor, will be best understood
from the following description of specific embodiments when read
in connection with thé accompanying drawings.
Figure 1 is a view showing a vertical section of a
coking oven door in accordance with the present invention7
Figure 2 is a plain view of the coking oven door of
Figure 17
Figure 3 is a view showing a horizontal section of the
coking oven door of Figure 1; and
Figure 4 is a view showing section A of Figure 3.
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A door of a coking oven, in accordance with the present
invention, has a door body which is identified by reference
numeral 1 and a door plug which is identified by reference num-
eral 2. The door lock 2 is mounted on the door body 1 by screws
3. The door body 1 is generally constituted of metal. A plur-
ality of spacer members 4 are provided between the door body 1
and the door plug 2 so that an intermediate space 5 is formed
between the same.
A diaphragm 7 which may be constituted of metal is
clamped on the door body 1 by screws 7. The diaphragm 7 is cir-
cular and circumferentially closed. A sealing member 8 extends
over an outer periphery of the diaphragm 7. The sealing member 8
is a packing strip which is formed here as a flat iron.
The sealing member 8 has an edge or plate which seal-
ingly abuts against a sealing ace 9 of a chamber frame 10. A
spring-biased pressing member 11 acts upon the sealing member 8.
The sealing member 11, similarly to the diaphragm 7, is mounted
on the door body 1. Finally, a further clrcular metallic dia-
phragm 12 is clamped by the screws 6. The metallic diaphragm 12
is U-shaped and limits the intermediate space 5 between the door
body and the door plug from outside.
The door plug 2 has a mounting plate 13 and a holding
element 14 for holding a refractory member. The holding element
14 is mounted on the mounting plate 13 by screws 15, as can be
seen from Figs. 3 and 4. The contact faces of the mounting plate
and the holding member 14 are kept to a minimum.
A plurality of adjustable limiting members 16 are
further provided. One of _he limiting members is shown in Fig. 1
and identified by reference numeral 16. The limiting members are
spaced from one another over the periphery oE the door body 1 and
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serve for correct placing of the door at a predetermined distance
from the chamber frame 10.
Door locking means are further provided. The door
locking means includes door locking elements identified by
reference numberal 13 and arranged in the upper region and in the
lower region of the coking oven door, as can be seen from Figs. 1
and 2.
The sealing member formed as a flat iron has advan-
tageously a small height, for example, of 35 millimeters. Such a
sealing member can effectively abut against the sealing face of
the chamber frame in the event of deformation.
It will be understood that each of the elements des-
cribed above, or two or more together, may also find a useful
application in other types of constructions differing from the
types described above.
While the invention has been illustrated and described
as embodied iA a door of a coking oven; it i8 no-t intended to be
limited to the details shown, since various modifications and
structural changes may be made without departing in any way from
the ~p1rit of the present invention.
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